mirror of
https://github.com/ziglang/zig.git
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08e886b8fe
Regressed in ed4ccea7bae99c1baa634716941f308d9f922985. The early exit path was only supposed to happen in case of --system mode.
1703 lines
67 KiB
Zig
1703 lines
67 KiB
Zig
//! Represents one independent job whose responsibility is to:
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//!
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//! 1. Check the global zig package cache to see if the hash already exists.
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//! If so, load, parse, and validate the build.zig.zon file therein, and
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//! goto step 8. Likewise if the location is a relative path, treat this
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//! the same as a cache hit. Otherwise, proceed.
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//! 2. Fetch and unpack a URL into a temporary directory.
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//! 3. Load, parse, and validate the build.zig.zon file therein. It is allowed
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//! for the file to be missing, in which case this fetched package is considered
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//! to be a "naked" package.
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//! 4. Apply inclusion rules of the build.zig.zon to the temporary directory by
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//! deleting excluded files. If any files had errors for files that were
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//! ultimately excluded, those errors should be ignored, such as failure to
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//! create symlinks that weren't supposed to be included anyway.
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//! 5. Compute the package hash based on the remaining files in the temporary
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//! directory.
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//! 6. Rename the temporary directory into the global zig package cache
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//! directory. If the hash already exists, delete the temporary directory and
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//! leave the zig package cache directory untouched as it may be in use by the
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//! system. This is done even if the hash is invalid, in case the package with
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//! the different hash is used in the future.
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//! 7. Validate the computed hash against the expected hash. If invalid,
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//! this job is done.
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//! 8. Spawn a new fetch job for each dependency in the manifest file. Use
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//! a mutex and a hash map so that redundant jobs do not get queued up.
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//!
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//! All of this must be done with only referring to the state inside this struct
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//! because this work will be done in a dedicated thread.
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arena: std.heap.ArenaAllocator,
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location: Location,
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location_tok: std.zig.Ast.TokenIndex,
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hash_tok: std.zig.Ast.TokenIndex,
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name_tok: std.zig.Ast.TokenIndex,
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lazy_status: LazyStatus,
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parent_package_root: Package.Path,
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parent_manifest_ast: ?*const std.zig.Ast,
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prog_node: *std.Progress.Node,
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job_queue: *JobQueue,
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/// If true, don't add an error for a missing hash. This flag is not passed
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/// down to recursive dependencies. It's intended to be used only be the CLI.
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omit_missing_hash_error: bool,
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/// If true, don't fail when a manifest file is missing the `paths` field,
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/// which specifies inclusion rules. This is intended to be true for the first
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/// fetch task and false for the recursive dependencies.
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allow_missing_paths_field: bool,
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// Above this are fields provided as inputs to `run`.
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// Below this are fields populated by `run`.
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/// This will either be relative to `global_cache`, or to the build root of
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/// the root package.
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package_root: Package.Path,
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error_bundle: ErrorBundle.Wip,
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manifest: ?Manifest,
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manifest_ast: std.zig.Ast,
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actual_hash: Manifest.Digest,
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/// Fetch logic notices whether a package has a build.zig file and sets this flag.
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has_build_zig: bool,
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/// Indicates whether the task aborted due to an out-of-memory condition.
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oom_flag: bool,
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// This field is used by the CLI only, untouched by this file.
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/// The module for this `Fetch` tasks's package, which exposes `build.zig` as
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/// the root source file.
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module: ?*Package.Module,
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pub const LazyStatus = enum {
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/// Not lazy.
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eager,
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/// Lazy, found.
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available,
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/// Lazy, not found.
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unavailable,
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};
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/// Contains shared state among all `Fetch` tasks.
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pub const JobQueue = struct {
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mutex: std.Thread.Mutex = .{},
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/// It's an array hash map so that it can be sorted before rendering the
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/// dependencies.zig source file.
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/// Protected by `mutex`.
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table: Table = .{},
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/// `table` may be missing some tasks such as ones that failed, so this
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/// field contains references to all of them.
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/// Protected by `mutex`.
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all_fetches: std.ArrayListUnmanaged(*Fetch) = .{},
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http_client: *std.http.Client,
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thread_pool: *ThreadPool,
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wait_group: WaitGroup = .{},
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global_cache: Cache.Directory,
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/// If true then, no fetching occurs, and:
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/// * The `global_cache` directory is assumed to be the direct parent
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/// directory of on-disk packages rather than having the "p/" directory
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/// prefix inside of it.
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/// * An error occurs if any non-lazy packages are not already present in
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/// the package cache directory.
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/// * Missing hash field causes an error, and no fetching occurs so it does
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/// not print the correct hash like usual.
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read_only: bool,
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recursive: bool,
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/// Dumps hash information to stdout which can be used to troubleshoot why
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/// two hashes of the same package do not match.
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/// If this is true, `recursive` must be false.
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debug_hash: bool,
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work_around_btrfs_bug: bool,
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/// Set of hashes that will be additionally fetched even if they are marked
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/// as lazy.
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unlazy_set: UnlazySet = .{},
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pub const Table = std.AutoArrayHashMapUnmanaged(Manifest.MultiHashHexDigest, *Fetch);
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pub const UnlazySet = std.AutoArrayHashMapUnmanaged(Manifest.MultiHashHexDigest, void);
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pub fn deinit(jq: *JobQueue) void {
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if (jq.all_fetches.items.len == 0) return;
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const gpa = jq.all_fetches.items[0].arena.child_allocator;
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jq.table.deinit(gpa);
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// These must be deinitialized in reverse order because subsequent
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// `Fetch` instances are allocated in prior ones' arenas.
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// Sorry, I know it's a bit weird, but it slightly simplifies the
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// critical section.
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while (jq.all_fetches.popOrNull()) |f| f.deinit();
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jq.all_fetches.deinit(gpa);
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jq.* = undefined;
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}
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/// Dumps all subsequent error bundles into the first one.
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pub fn consolidateErrors(jq: *JobQueue) !void {
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const root = &jq.all_fetches.items[0].error_bundle;
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const gpa = root.gpa;
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for (jq.all_fetches.items[1..]) |fetch| {
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if (fetch.error_bundle.root_list.items.len > 0) {
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var bundle = try fetch.error_bundle.toOwnedBundle("");
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defer bundle.deinit(gpa);
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try root.addBundleAsRoots(bundle);
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}
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}
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}
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/// Creates the dependencies.zig source code for the build runner to obtain
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/// via `@import("@dependencies")`.
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pub fn createDependenciesSource(jq: *JobQueue, buf: *std.ArrayList(u8)) Allocator.Error!void {
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const keys = jq.table.keys();
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assert(keys.len != 0); // caller should have added the first one
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if (keys.len == 1) {
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// This is the first one. It must have no dependencies.
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return createEmptyDependenciesSource(buf);
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}
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try buf.appendSlice("pub const packages = struct {\n");
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// Ensure the generated .zig file is deterministic.
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jq.table.sortUnstable(@as(struct {
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keys: []const Manifest.MultiHashHexDigest,
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pub fn lessThan(ctx: @This(), a_index: usize, b_index: usize) bool {
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return std.mem.lessThan(u8, &ctx.keys[a_index], &ctx.keys[b_index]);
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}
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}, .{ .keys = keys }));
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for (keys, jq.table.values()) |hash, fetch| {
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if (fetch == jq.all_fetches.items[0]) {
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// The first one is a dummy package for the current project.
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continue;
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}
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try buf.writer().print(
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\\ pub const {} = struct {{
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\\
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, .{std.zig.fmtId(&hash)});
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lazy: {
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switch (fetch.lazy_status) {
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.eager => break :lazy,
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.available => {
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try buf.appendSlice(
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\\ pub const available = true;
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\\
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);
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break :lazy;
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},
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.unavailable => {
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try buf.appendSlice(
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\\ pub const available = false;
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\\ };
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\\
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);
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continue;
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},
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}
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}
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try buf.writer().print(
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\\ pub const build_root = "{q}";
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\\
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, .{fetch.package_root});
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if (fetch.has_build_zig) {
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try buf.writer().print(
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\\ pub const build_zig = @import("{}");
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\\
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, .{std.zig.fmtEscapes(&hash)});
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}
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if (fetch.manifest) |*manifest| {
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try buf.appendSlice(
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\\ pub const deps: []const struct { []const u8, []const u8 } = &.{
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\\
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);
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for (manifest.dependencies.keys(), manifest.dependencies.values()) |name, dep| {
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const h = depDigest(fetch.package_root, jq.global_cache, dep) orelse continue;
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try buf.writer().print(
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" .{{ \"{}\", \"{}\" }},\n",
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.{ std.zig.fmtEscapes(name), std.zig.fmtEscapes(&h) },
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);
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}
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try buf.appendSlice(
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\\ };
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\\ };
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\\
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);
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} else {
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try buf.appendSlice(
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\\ pub const deps: []const struct { []const u8, []const u8 } = &.{};
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\\ };
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\\
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);
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}
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}
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try buf.appendSlice(
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\\};
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\\
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\\pub const root_deps: []const struct { []const u8, []const u8 } = &.{
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\\
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);
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const root_fetch = jq.all_fetches.items[0];
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const root_manifest = &root_fetch.manifest.?;
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for (root_manifest.dependencies.keys(), root_manifest.dependencies.values()) |name, dep| {
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const h = depDigest(root_fetch.package_root, jq.global_cache, dep) orelse continue;
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try buf.writer().print(
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" .{{ \"{}\", \"{}\" }},\n",
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.{ std.zig.fmtEscapes(name), std.zig.fmtEscapes(&h) },
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);
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}
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try buf.appendSlice("};\n");
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}
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pub fn createEmptyDependenciesSource(buf: *std.ArrayList(u8)) Allocator.Error!void {
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try buf.appendSlice(
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\\pub const packages = struct {};
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\\pub const root_deps: []const struct { []const u8, []const u8 } = &.{};
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\\
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);
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}
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};
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pub const Location = union(enum) {
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remote: Remote,
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/// A directory found inside the parent package.
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relative_path: Package.Path,
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/// Recursive Fetch tasks will never use this Location, but it may be
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/// passed in by the CLI. Indicates the file contents here should be copied
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/// into the global package cache. It may be a file relative to the cwd or
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/// absolute, in which case it should be treated exactly like a `file://`
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/// URL, or a directory, in which case it should be treated as an
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/// already-unpacked directory (but still needs to be copied into the
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/// global package cache and have inclusion rules applied).
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path_or_url: []const u8,
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pub const Remote = struct {
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url: []const u8,
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/// If this is null it means the user omitted the hash field from a dependency.
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/// It will be an error but the logic should still fetch and print the discovered hash.
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hash: ?Manifest.MultiHashHexDigest,
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};
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};
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pub const RunError = error{
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OutOfMemory,
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/// This error code is intended to be handled by inspecting the
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/// `error_bundle` field.
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FetchFailed,
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};
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pub fn run(f: *Fetch) RunError!void {
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const eb = &f.error_bundle;
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const arena = f.arena.allocator();
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const gpa = f.arena.child_allocator;
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const cache_root = f.job_queue.global_cache;
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try eb.init(gpa);
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// Check the global zig package cache to see if the hash already exists. If
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// so, load, parse, and validate the build.zig.zon file therein, and skip
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// ahead to queuing up jobs for dependencies. Likewise if the location is a
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// relative path, treat this the same as a cache hit. Otherwise, proceed.
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const remote = switch (f.location) {
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.relative_path => |pkg_root| {
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if (fs.path.isAbsolute(pkg_root.sub_path)) return f.fail(
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f.location_tok,
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try eb.addString("expected path relative to build root; found absolute path"),
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);
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if (f.hash_tok != 0) return f.fail(
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f.hash_tok,
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try eb.addString("path-based dependencies are not hashed"),
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);
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// Packages fetched by URL may not use relative paths to escape outside the
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// fetched package directory from within the package cache.
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if (pkg_root.root_dir.eql(cache_root)) {
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// `parent_package_root.sub_path` contains a path like this:
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// "p/$hash", or
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// "p/$hash/foo", with possibly more directories after "foo".
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// We want to fail unless the resolved relative path has a
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// prefix of "p/$hash/".
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const digest_len = @typeInfo(Manifest.MultiHashHexDigest).Array.len;
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const prefix_len: usize = if (f.job_queue.read_only) 0 else "p/".len;
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const expected_prefix = f.parent_package_root.sub_path[0 .. prefix_len + digest_len];
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if (!std.mem.startsWith(u8, pkg_root.sub_path, expected_prefix)) {
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return f.fail(
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f.location_tok,
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try eb.printString("dependency path outside project: '{}'", .{pkg_root}),
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);
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}
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}
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f.package_root = pkg_root;
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try loadManifest(f, pkg_root);
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if (!f.has_build_zig) try checkBuildFileExistence(f);
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if (!f.job_queue.recursive) return;
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return queueJobsForDeps(f);
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},
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.remote => |remote| remote,
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.path_or_url => |path_or_url| {
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if (fs.cwd().openDir(path_or_url, .{ .iterate = true })) |dir| {
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var resource: Resource = .{ .dir = dir };
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return runResource(f, path_or_url, &resource, null);
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} else |dir_err| {
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const file_err = if (dir_err == error.NotDir) e: {
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if (fs.cwd().openFile(path_or_url, .{})) |file| {
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var resource: Resource = .{ .file = file };
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return runResource(f, path_or_url, &resource, null);
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} else |err| break :e err;
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} else dir_err;
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const uri = std.Uri.parse(path_or_url) catch |uri_err| {
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return f.fail(0, try eb.printString(
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"'{s}' could not be recognized as a file path ({s}) or an URL ({s})",
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.{ path_or_url, @errorName(file_err), @errorName(uri_err) },
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));
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};
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var server_header_buffer: [header_buffer_size]u8 = undefined;
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var resource = try f.initResource(uri, &server_header_buffer);
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return runResource(f, uri.path, &resource, null);
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}
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},
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};
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const s = fs.path.sep_str;
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if (remote.hash) |expected_hash| {
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const prefixed_pkg_sub_path = "p" ++ s ++ expected_hash;
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const prefix_len: usize = if (f.job_queue.read_only) "p/".len else 0;
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const pkg_sub_path = prefixed_pkg_sub_path[prefix_len..];
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if (cache_root.handle.access(pkg_sub_path, .{})) |_| {
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assert(f.lazy_status != .unavailable);
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f.package_root = .{
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.root_dir = cache_root,
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.sub_path = try arena.dupe(u8, pkg_sub_path),
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};
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try loadManifest(f, f.package_root);
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try checkBuildFileExistence(f);
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if (!f.job_queue.recursive) return;
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return queueJobsForDeps(f);
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} else |err| switch (err) {
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error.FileNotFound => {
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switch (f.lazy_status) {
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.eager => {},
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.available => if (!f.job_queue.unlazy_set.contains(expected_hash)) {
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f.lazy_status = .unavailable;
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return;
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},
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.unavailable => unreachable,
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}
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if (f.job_queue.read_only) return f.fail(
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f.name_tok,
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try eb.printString("package not found at '{}{s}'", .{
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cache_root, pkg_sub_path,
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}),
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);
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},
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else => |e| {
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try eb.addRootErrorMessage(.{
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.msg = try eb.printString("unable to open global package cache directory '{}{s}': {s}", .{
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cache_root, pkg_sub_path, @errorName(e),
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}),
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});
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return error.FetchFailed;
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},
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}
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} else if (f.job_queue.read_only) {
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try eb.addRootErrorMessage(.{
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.msg = try eb.addString("dependency is missing hash field"),
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.src_loc = try f.srcLoc(f.location_tok),
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});
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return error.FetchFailed;
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}
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// Fetch and unpack the remote into a temporary directory.
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const uri = std.Uri.parse(remote.url) catch |err| return f.fail(
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f.location_tok,
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try eb.printString("invalid URI: {s}", .{@errorName(err)}),
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);
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var server_header_buffer: [header_buffer_size]u8 = undefined;
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var resource = try f.initResource(uri, &server_header_buffer);
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return runResource(f, uri.path, &resource, remote.hash);
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}
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pub fn deinit(f: *Fetch) void {
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f.error_bundle.deinit();
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f.arena.deinit();
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}
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|
|
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/// Consumes `resource`, even if an error is returned.
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|
fn runResource(
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f: *Fetch,
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uri_path: []const u8,
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resource: *Resource,
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|
remote_hash: ?Manifest.MultiHashHexDigest,
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) RunError!void {
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defer resource.deinit();
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const arena = f.arena.allocator();
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const eb = &f.error_bundle;
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const s = fs.path.sep_str;
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const cache_root = f.job_queue.global_cache;
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const rand_int = std.crypto.random.int(u64);
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const tmp_dir_sub_path = "tmp" ++ s ++ Manifest.hex64(rand_int);
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{
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const tmp_directory_path = try cache_root.join(arena, &.{tmp_dir_sub_path});
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var tmp_directory: Cache.Directory = .{
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.path = tmp_directory_path,
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.handle = handle: {
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const dir = cache_root.handle.makeOpenPath(tmp_dir_sub_path, .{
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.iterate = true,
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}) catch |err| {
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try eb.addRootErrorMessage(.{
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.msg = try eb.printString("unable to create temporary directory '{s}': {s}", .{
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tmp_directory_path, @errorName(err),
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}),
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});
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return error.FetchFailed;
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};
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break :handle dir;
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},
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};
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defer tmp_directory.handle.close();
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try unpackResource(f, resource, uri_path, tmp_directory);
|
|
|
|
// Load, parse, and validate the unpacked build.zig.zon file. It is allowed
|
|
// for the file to be missing, in which case this fetched package is
|
|
// considered to be a "naked" package.
|
|
try loadManifest(f, .{ .root_dir = tmp_directory });
|
|
|
|
// Apply the manifest's inclusion rules to the temporary directory by
|
|
// deleting excluded files. If any error occurred for files that were
|
|
// ultimately excluded, those errors should be ignored, such as failure to
|
|
// create symlinks that weren't supposed to be included anyway.
|
|
|
|
// Empty directories have already been omitted by `unpackResource`.
|
|
|
|
const filter: Filter = .{
|
|
.include_paths = if (f.manifest) |m| m.paths else .{},
|
|
};
|
|
|
|
// Compute the package hash based on the remaining files in the temporary
|
|
// directory.
|
|
|
|
if (builtin.os.tag == .linux and f.job_queue.work_around_btrfs_bug) {
|
|
// https://github.com/ziglang/zig/issues/17095
|
|
tmp_directory.handle.close();
|
|
tmp_directory.handle = cache_root.handle.makeOpenPath(tmp_dir_sub_path, .{
|
|
.iterate = true,
|
|
}) catch @panic("btrfs workaround failed");
|
|
}
|
|
|
|
f.actual_hash = try computeHash(f, tmp_directory, filter);
|
|
}
|
|
|
|
// Rename the temporary directory into the global zig package cache
|
|
// directory. If the hash already exists, delete the temporary directory
|
|
// and leave the zig package cache directory untouched as it may be in use
|
|
// by the system. This is done even if the hash is invalid, in case the
|
|
// package with the different hash is used in the future.
|
|
|
|
f.package_root = .{
|
|
.root_dir = cache_root,
|
|
.sub_path = try arena.dupe(u8, "p" ++ s ++ Manifest.hexDigest(f.actual_hash)),
|
|
};
|
|
renameTmpIntoCache(cache_root.handle, tmp_dir_sub_path, f.package_root.sub_path) catch |err| {
|
|
const src = try cache_root.join(arena, &.{tmp_dir_sub_path});
|
|
const dest = try cache_root.join(arena, &.{f.package_root.sub_path});
|
|
try eb.addRootErrorMessage(.{ .msg = try eb.printString(
|
|
"unable to rename temporary directory '{s}' into package cache directory '{s}': {s}",
|
|
.{ src, dest, @errorName(err) },
|
|
) });
|
|
return error.FetchFailed;
|
|
};
|
|
|
|
// Validate the computed hash against the expected hash. If invalid, this
|
|
// job is done.
|
|
|
|
const actual_hex = Manifest.hexDigest(f.actual_hash);
|
|
if (remote_hash) |declared_hash| {
|
|
if (!std.mem.eql(u8, &declared_hash, &actual_hex)) {
|
|
return f.fail(f.hash_tok, try eb.printString(
|
|
"hash mismatch: manifest declares {s} but the fetched package has {s}",
|
|
.{ declared_hash, actual_hex },
|
|
));
|
|
}
|
|
} else if (!f.omit_missing_hash_error) {
|
|
const notes_len = 1;
|
|
try eb.addRootErrorMessage(.{
|
|
.msg = try eb.addString("dependency is missing hash field"),
|
|
.src_loc = try f.srcLoc(f.location_tok),
|
|
.notes_len = notes_len,
|
|
});
|
|
const notes_start = try eb.reserveNotes(notes_len);
|
|
eb.extra.items[notes_start] = @intFromEnum(try eb.addErrorMessage(.{
|
|
.msg = try eb.printString("expected .hash = \"{s}\",", .{&actual_hex}),
|
|
}));
|
|
return error.FetchFailed;
|
|
}
|
|
|
|
// Spawn a new fetch job for each dependency in the manifest file. Use
|
|
// a mutex and a hash map so that redundant jobs do not get queued up.
|
|
if (!f.job_queue.recursive) return;
|
|
return queueJobsForDeps(f);
|
|
}
|
|
|
|
/// `computeHash` gets a free check for the existence of `build.zig`, but when
|
|
/// not computing a hash, we need to do a syscall to check for it.
|
|
fn checkBuildFileExistence(f: *Fetch) RunError!void {
|
|
const eb = &f.error_bundle;
|
|
if (f.package_root.access(Package.build_zig_basename, .{})) |_| {
|
|
f.has_build_zig = true;
|
|
} else |err| switch (err) {
|
|
error.FileNotFound => {},
|
|
else => |e| {
|
|
try eb.addRootErrorMessage(.{
|
|
.msg = try eb.printString("unable to access '{}{s}': {s}", .{
|
|
f.package_root, Package.build_zig_basename, @errorName(e),
|
|
}),
|
|
});
|
|
return error.FetchFailed;
|
|
},
|
|
}
|
|
}
|
|
|
|
/// This function populates `f.manifest` or leaves it `null`.
|
|
fn loadManifest(f: *Fetch, pkg_root: Package.Path) RunError!void {
|
|
const eb = &f.error_bundle;
|
|
const arena = f.arena.allocator();
|
|
const manifest_bytes = pkg_root.root_dir.handle.readFileAllocOptions(
|
|
arena,
|
|
try fs.path.join(arena, &.{ pkg_root.sub_path, Manifest.basename }),
|
|
Manifest.max_bytes,
|
|
null,
|
|
1,
|
|
0,
|
|
) catch |err| switch (err) {
|
|
error.FileNotFound => return,
|
|
else => |e| {
|
|
const file_path = try pkg_root.join(arena, Manifest.basename);
|
|
try eb.addRootErrorMessage(.{
|
|
.msg = try eb.printString("unable to load package manifest '{}': {s}", .{
|
|
file_path, @errorName(e),
|
|
}),
|
|
});
|
|
return error.FetchFailed;
|
|
},
|
|
};
|
|
|
|
const ast = &f.manifest_ast;
|
|
ast.* = try std.zig.Ast.parse(arena, manifest_bytes, .zon);
|
|
|
|
if (ast.errors.len > 0) {
|
|
const file_path = try std.fmt.allocPrint(arena, "{}" ++ Manifest.basename, .{pkg_root});
|
|
try main.putAstErrorsIntoBundle(arena, ast.*, file_path, eb);
|
|
return error.FetchFailed;
|
|
}
|
|
|
|
f.manifest = try Manifest.parse(arena, ast.*, .{
|
|
.allow_missing_paths_field = f.allow_missing_paths_field,
|
|
});
|
|
const manifest = &f.manifest.?;
|
|
|
|
if (manifest.errors.len > 0) {
|
|
const src_path = try eb.printString("{}{s}", .{ pkg_root, Manifest.basename });
|
|
try manifest.copyErrorsIntoBundle(ast.*, src_path, eb);
|
|
return error.FetchFailed;
|
|
}
|
|
}
|
|
|
|
fn queueJobsForDeps(f: *Fetch) RunError!void {
|
|
assert(f.job_queue.recursive);
|
|
|
|
// If the package does not have a build.zig.zon file then there are no dependencies.
|
|
const manifest = f.manifest orelse return;
|
|
|
|
const new_fetches, const prog_names = nf: {
|
|
const parent_arena = f.arena.allocator();
|
|
const gpa = f.arena.child_allocator;
|
|
const cache_root = f.job_queue.global_cache;
|
|
const dep_names = manifest.dependencies.keys();
|
|
const deps = manifest.dependencies.values();
|
|
// Grab the new tasks into a temporary buffer so we can unlock that mutex
|
|
// as fast as possible.
|
|
// This overallocates any fetches that get skipped by the `continue` in the
|
|
// loop below.
|
|
const new_fetches = try parent_arena.alloc(Fetch, deps.len);
|
|
const prog_names = try parent_arena.alloc([]const u8, deps.len);
|
|
var new_fetch_index: usize = 0;
|
|
|
|
f.job_queue.mutex.lock();
|
|
defer f.job_queue.mutex.unlock();
|
|
|
|
try f.job_queue.all_fetches.ensureUnusedCapacity(gpa, new_fetches.len);
|
|
try f.job_queue.table.ensureUnusedCapacity(gpa, @intCast(new_fetches.len));
|
|
|
|
// There are four cases here:
|
|
// * Correct hash is provided by manifest.
|
|
// - Hash map already has the entry, no need to add it again.
|
|
// * Incorrect hash is provided by manifest.
|
|
// - Hash mismatch error emitted; `queueJobsForDeps` is not called.
|
|
// * Hash is not provided by manifest.
|
|
// - Hash missing error emitted; `queueJobsForDeps` is not called.
|
|
// * path-based location is used without a hash.
|
|
// - Hash is added to the table based on the path alone before
|
|
// calling run(); no need to add it again.
|
|
|
|
for (dep_names, deps) |dep_name, dep| {
|
|
const new_fetch = &new_fetches[new_fetch_index];
|
|
const location: Location = switch (dep.location) {
|
|
.url => |url| .{ .remote = .{
|
|
.url = url,
|
|
.hash = h: {
|
|
const h = dep.hash orelse break :h null;
|
|
const digest_len = @typeInfo(Manifest.MultiHashHexDigest).Array.len;
|
|
const multihash_digest = h[0..digest_len].*;
|
|
const gop = f.job_queue.table.getOrPutAssumeCapacity(multihash_digest);
|
|
if (gop.found_existing) continue;
|
|
gop.value_ptr.* = new_fetch;
|
|
break :h multihash_digest;
|
|
},
|
|
} },
|
|
.path => |rel_path| l: {
|
|
// This might produce an invalid path, which is checked for
|
|
// at the beginning of run().
|
|
const new_root = try f.package_root.resolvePosix(parent_arena, rel_path);
|
|
const multihash_digest = relativePathDigest(new_root, cache_root);
|
|
const gop = f.job_queue.table.getOrPutAssumeCapacity(multihash_digest);
|
|
if (gop.found_existing) continue;
|
|
gop.value_ptr.* = new_fetch;
|
|
break :l .{ .relative_path = new_root };
|
|
},
|
|
};
|
|
prog_names[new_fetch_index] = dep_name;
|
|
new_fetch_index += 1;
|
|
f.job_queue.all_fetches.appendAssumeCapacity(new_fetch);
|
|
new_fetch.* = .{
|
|
.arena = std.heap.ArenaAllocator.init(gpa),
|
|
.location = location,
|
|
.location_tok = dep.location_tok,
|
|
.hash_tok = dep.hash_tok,
|
|
.name_tok = dep.name_tok,
|
|
.lazy_status = if (dep.lazy) .available else .eager,
|
|
.parent_package_root = f.package_root,
|
|
.parent_manifest_ast = &f.manifest_ast,
|
|
.prog_node = f.prog_node,
|
|
.job_queue = f.job_queue,
|
|
.omit_missing_hash_error = false,
|
|
.allow_missing_paths_field = true,
|
|
|
|
.package_root = undefined,
|
|
.error_bundle = undefined,
|
|
.manifest = null,
|
|
.manifest_ast = undefined,
|
|
.actual_hash = undefined,
|
|
.has_build_zig = false,
|
|
.oom_flag = false,
|
|
|
|
.module = null,
|
|
};
|
|
}
|
|
|
|
// job_queue mutex is locked so this is OK.
|
|
f.prog_node.unprotected_estimated_total_items += new_fetch_index;
|
|
|
|
break :nf .{ new_fetches[0..new_fetch_index], prog_names[0..new_fetch_index] };
|
|
};
|
|
|
|
// Now it's time to give tasks to the thread pool.
|
|
const thread_pool = f.job_queue.thread_pool;
|
|
|
|
for (new_fetches, prog_names) |*new_fetch, prog_name| {
|
|
f.job_queue.wait_group.start();
|
|
thread_pool.spawn(workerRun, .{ new_fetch, prog_name }) catch |err| switch (err) {
|
|
error.OutOfMemory => {
|
|
new_fetch.oom_flag = true;
|
|
f.job_queue.wait_group.finish();
|
|
continue;
|
|
},
|
|
};
|
|
}
|
|
}
|
|
|
|
pub fn relativePathDigest(
|
|
pkg_root: Package.Path,
|
|
cache_root: Cache.Directory,
|
|
) Manifest.MultiHashHexDigest {
|
|
var hasher = Manifest.Hash.init(.{});
|
|
// This hash is a tuple of:
|
|
// * whether it relative to the global cache directory or to the root package
|
|
// * the relative file path from there to the build root of the package
|
|
hasher.update(if (pkg_root.root_dir.eql(cache_root))
|
|
&package_hash_prefix_cached
|
|
else
|
|
&package_hash_prefix_project);
|
|
hasher.update(pkg_root.sub_path);
|
|
return Manifest.hexDigest(hasher.finalResult());
|
|
}
|
|
|
|
pub fn workerRun(f: *Fetch, prog_name: []const u8) void {
|
|
defer f.job_queue.wait_group.finish();
|
|
|
|
var prog_node = f.prog_node.start(prog_name, 0);
|
|
defer prog_node.end();
|
|
prog_node.activate();
|
|
|
|
run(f) catch |err| switch (err) {
|
|
error.OutOfMemory => f.oom_flag = true,
|
|
error.FetchFailed => {
|
|
// Nothing to do because the errors are already reported in `error_bundle`,
|
|
// and a reference is kept to the `Fetch` task inside `all_fetches`.
|
|
},
|
|
};
|
|
}
|
|
|
|
fn srcLoc(
|
|
f: *Fetch,
|
|
tok: std.zig.Ast.TokenIndex,
|
|
) Allocator.Error!ErrorBundle.SourceLocationIndex {
|
|
const ast = f.parent_manifest_ast orelse return .none;
|
|
const eb = &f.error_bundle;
|
|
const token_starts = ast.tokens.items(.start);
|
|
const start_loc = ast.tokenLocation(0, tok);
|
|
const src_path = try eb.printString("{}" ++ Manifest.basename, .{f.parent_package_root});
|
|
const msg_off = 0;
|
|
return eb.addSourceLocation(.{
|
|
.src_path = src_path,
|
|
.span_start = token_starts[tok],
|
|
.span_end = @intCast(token_starts[tok] + ast.tokenSlice(tok).len),
|
|
.span_main = token_starts[tok] + msg_off,
|
|
.line = @intCast(start_loc.line),
|
|
.column = @intCast(start_loc.column),
|
|
.source_line = try eb.addString(ast.source[start_loc.line_start..start_loc.line_end]),
|
|
});
|
|
}
|
|
|
|
fn fail(f: *Fetch, msg_tok: std.zig.Ast.TokenIndex, msg_str: u32) RunError {
|
|
const eb = &f.error_bundle;
|
|
try eb.addRootErrorMessage(.{
|
|
.msg = msg_str,
|
|
.src_loc = try f.srcLoc(msg_tok),
|
|
});
|
|
return error.FetchFailed;
|
|
}
|
|
|
|
const Resource = union(enum) {
|
|
file: fs.File,
|
|
http_request: std.http.Client.Request,
|
|
git: Git,
|
|
dir: fs.Dir,
|
|
|
|
const Git = struct {
|
|
fetch_stream: git.Session.FetchStream,
|
|
want_oid: [git.oid_length]u8,
|
|
};
|
|
|
|
fn deinit(resource: *Resource) void {
|
|
switch (resource.*) {
|
|
.file => |*file| file.close(),
|
|
.http_request => |*req| req.deinit(),
|
|
.git => |*git_resource| git_resource.fetch_stream.deinit(),
|
|
.dir => |*dir| dir.close(),
|
|
}
|
|
resource.* = undefined;
|
|
}
|
|
|
|
fn reader(resource: *Resource) std.io.AnyReader {
|
|
return .{
|
|
.context = resource,
|
|
.readFn = read,
|
|
};
|
|
}
|
|
|
|
fn read(context: *const anyopaque, buffer: []u8) anyerror!usize {
|
|
const resource: *Resource = @constCast(@ptrCast(@alignCast(context)));
|
|
switch (resource.*) {
|
|
.file => |*f| return f.read(buffer),
|
|
.http_request => |*r| return r.read(buffer),
|
|
.git => |*g| return g.fetch_stream.read(buffer),
|
|
.dir => unreachable,
|
|
}
|
|
}
|
|
};
|
|
|
|
const FileType = enum {
|
|
tar,
|
|
@"tar.gz",
|
|
@"tar.xz",
|
|
@"tar.zst",
|
|
git_pack,
|
|
|
|
fn fromPath(file_path: []const u8) ?FileType {
|
|
if (ascii.endsWithIgnoreCase(file_path, ".tar")) return .tar;
|
|
if (ascii.endsWithIgnoreCase(file_path, ".tgz")) return .@"tar.gz";
|
|
if (ascii.endsWithIgnoreCase(file_path, ".tar.gz")) return .@"tar.gz";
|
|
if (ascii.endsWithIgnoreCase(file_path, ".txz")) return .@"tar.xz";
|
|
if (ascii.endsWithIgnoreCase(file_path, ".tar.xz")) return .@"tar.xz";
|
|
if (ascii.endsWithIgnoreCase(file_path, ".tzst")) return .@"tar.zst";
|
|
if (ascii.endsWithIgnoreCase(file_path, ".tar.zst")) return .@"tar.zst";
|
|
return null;
|
|
}
|
|
|
|
/// Parameter is a content-disposition header value.
|
|
fn fromContentDisposition(cd_header: []const u8) ?FileType {
|
|
const attach_end = ascii.indexOfIgnoreCase(cd_header, "attachment;") orelse
|
|
return null;
|
|
|
|
var value_start = ascii.indexOfIgnoreCasePos(cd_header, attach_end + 1, "filename") orelse
|
|
return null;
|
|
value_start += "filename".len;
|
|
if (cd_header[value_start] == '*') {
|
|
value_start += 1;
|
|
}
|
|
if (cd_header[value_start] != '=') return null;
|
|
value_start += 1;
|
|
|
|
var value_end = std.mem.indexOfPos(u8, cd_header, value_start, ";") orelse cd_header.len;
|
|
if (cd_header[value_end - 1] == '\"') {
|
|
value_end -= 1;
|
|
}
|
|
return fromPath(cd_header[value_start..value_end]);
|
|
}
|
|
|
|
test fromContentDisposition {
|
|
try std.testing.expectEqual(@as(?FileType, .@"tar.gz"), fromContentDisposition("attaChment; FILENAME=\"stuff.tar.gz\"; size=42"));
|
|
try std.testing.expectEqual(@as(?FileType, .@"tar.gz"), fromContentDisposition("attachment; filename*=\"stuff.tar.gz\""));
|
|
try std.testing.expectEqual(@as(?FileType, .@"tar.xz"), fromContentDisposition("ATTACHMENT; filename=\"stuff.tar.xz\""));
|
|
try std.testing.expectEqual(@as(?FileType, .@"tar.xz"), fromContentDisposition("attachment; FileName=\"stuff.tar.xz\""));
|
|
try std.testing.expectEqual(@as(?FileType, .@"tar.gz"), fromContentDisposition("attachment; FileName*=UTF-8\'\'xyz%2Fstuff.tar.gz"));
|
|
|
|
try std.testing.expect(fromContentDisposition("attachment FileName=\"stuff.tar.gz\"") == null);
|
|
try std.testing.expect(fromContentDisposition("attachment; FileName=\"stuff.tar\"") == null);
|
|
try std.testing.expect(fromContentDisposition("attachment; FileName\"stuff.gz\"") == null);
|
|
try std.testing.expect(fromContentDisposition("attachment; size=42") == null);
|
|
try std.testing.expect(fromContentDisposition("inline; size=42") == null);
|
|
try std.testing.expect(fromContentDisposition("FileName=\"stuff.tar.gz\"; attachment;") == null);
|
|
try std.testing.expect(fromContentDisposition("FileName=\"stuff.tar.gz\";") == null);
|
|
}
|
|
};
|
|
|
|
const header_buffer_size = 16 * 1024;
|
|
|
|
fn initResource(f: *Fetch, uri: std.Uri, server_header_buffer: []u8) RunError!Resource {
|
|
const gpa = f.arena.child_allocator;
|
|
const arena = f.arena.allocator();
|
|
const eb = &f.error_bundle;
|
|
|
|
if (ascii.eqlIgnoreCase(uri.scheme, "file")) return .{
|
|
.file = f.parent_package_root.openFile(uri.path, .{}) catch |err| {
|
|
return f.fail(f.location_tok, try eb.printString("unable to open '{}{s}': {s}", .{
|
|
f.parent_package_root, uri.path, @errorName(err),
|
|
}));
|
|
},
|
|
};
|
|
|
|
const http_client = f.job_queue.http_client;
|
|
|
|
if (ascii.eqlIgnoreCase(uri.scheme, "http") or
|
|
ascii.eqlIgnoreCase(uri.scheme, "https"))
|
|
{
|
|
var req = http_client.open(.GET, uri, .{
|
|
.server_header_buffer = server_header_buffer,
|
|
}) catch |err| {
|
|
return f.fail(f.location_tok, try eb.printString(
|
|
"unable to connect to server: {s}",
|
|
.{@errorName(err)},
|
|
));
|
|
};
|
|
errdefer req.deinit(); // releases more than memory
|
|
|
|
req.send(.{}) catch |err| {
|
|
return f.fail(f.location_tok, try eb.printString(
|
|
"HTTP request failed: {s}",
|
|
.{@errorName(err)},
|
|
));
|
|
};
|
|
req.wait() catch |err| {
|
|
return f.fail(f.location_tok, try eb.printString(
|
|
"invalid HTTP response: {s}",
|
|
.{@errorName(err)},
|
|
));
|
|
};
|
|
|
|
if (req.response.status != .ok) {
|
|
return f.fail(f.location_tok, try eb.printString(
|
|
"bad HTTP response code: '{d} {s}'",
|
|
.{ @intFromEnum(req.response.status), req.response.status.phrase() orelse "" },
|
|
));
|
|
}
|
|
|
|
return .{ .http_request = req };
|
|
}
|
|
|
|
if (ascii.eqlIgnoreCase(uri.scheme, "git+http") or
|
|
ascii.eqlIgnoreCase(uri.scheme, "git+https"))
|
|
{
|
|
var transport_uri = uri;
|
|
transport_uri.scheme = uri.scheme["git+".len..];
|
|
var redirect_uri: []u8 = undefined;
|
|
var session: git.Session = .{ .transport = http_client, .uri = transport_uri };
|
|
session.discoverCapabilities(gpa, &redirect_uri, server_header_buffer) catch |err| switch (err) {
|
|
error.Redirected => {
|
|
defer gpa.free(redirect_uri);
|
|
return f.fail(f.location_tok, try eb.printString(
|
|
"repository moved to {s}",
|
|
.{redirect_uri},
|
|
));
|
|
},
|
|
else => |e| {
|
|
return f.fail(f.location_tok, try eb.printString(
|
|
"unable to discover remote git server capabilities: {s}",
|
|
.{@errorName(e)},
|
|
));
|
|
},
|
|
};
|
|
|
|
const want_oid = want_oid: {
|
|
const want_ref = uri.fragment orelse "HEAD";
|
|
if (git.parseOid(want_ref)) |oid| break :want_oid oid else |_| {}
|
|
|
|
const want_ref_head = try std.fmt.allocPrint(arena, "refs/heads/{s}", .{want_ref});
|
|
const want_ref_tag = try std.fmt.allocPrint(arena, "refs/tags/{s}", .{want_ref});
|
|
|
|
var ref_iterator = session.listRefs(gpa, .{
|
|
.ref_prefixes = &.{ want_ref, want_ref_head, want_ref_tag },
|
|
.include_peeled = true,
|
|
.server_header_buffer = server_header_buffer,
|
|
}) catch |err| {
|
|
return f.fail(f.location_tok, try eb.printString(
|
|
"unable to list refs: {s}",
|
|
.{@errorName(err)},
|
|
));
|
|
};
|
|
defer ref_iterator.deinit();
|
|
while (ref_iterator.next() catch |err| {
|
|
return f.fail(f.location_tok, try eb.printString(
|
|
"unable to iterate refs: {s}",
|
|
.{@errorName(err)},
|
|
));
|
|
}) |ref| {
|
|
if (std.mem.eql(u8, ref.name, want_ref) or
|
|
std.mem.eql(u8, ref.name, want_ref_head) or
|
|
std.mem.eql(u8, ref.name, want_ref_tag))
|
|
{
|
|
break :want_oid ref.peeled orelse ref.oid;
|
|
}
|
|
}
|
|
return f.fail(f.location_tok, try eb.printString("ref not found: {s}", .{want_ref}));
|
|
};
|
|
if (uri.fragment == null) {
|
|
const notes_len = 1;
|
|
try eb.addRootErrorMessage(.{
|
|
.msg = try eb.addString("url field is missing an explicit ref"),
|
|
.src_loc = try f.srcLoc(f.location_tok),
|
|
.notes_len = notes_len,
|
|
});
|
|
const notes_start = try eb.reserveNotes(notes_len);
|
|
eb.extra.items[notes_start] = @intFromEnum(try eb.addErrorMessage(.{
|
|
.msg = try eb.printString("try .url = \"{;+/}#{}\",", .{
|
|
uri, std.fmt.fmtSliceHexLower(&want_oid),
|
|
}),
|
|
}));
|
|
return error.FetchFailed;
|
|
}
|
|
|
|
var want_oid_buf: [git.fmt_oid_length]u8 = undefined;
|
|
_ = std.fmt.bufPrint(&want_oid_buf, "{}", .{
|
|
std.fmt.fmtSliceHexLower(&want_oid),
|
|
}) catch unreachable;
|
|
var fetch_stream = session.fetch(gpa, &.{&want_oid_buf}, server_header_buffer) catch |err| {
|
|
return f.fail(f.location_tok, try eb.printString(
|
|
"unable to create fetch stream: {s}",
|
|
.{@errorName(err)},
|
|
));
|
|
};
|
|
errdefer fetch_stream.deinit();
|
|
|
|
return .{ .git = .{
|
|
.fetch_stream = fetch_stream,
|
|
.want_oid = want_oid,
|
|
} };
|
|
}
|
|
|
|
return f.fail(f.location_tok, try eb.printString(
|
|
"unsupported URL scheme: {s}",
|
|
.{uri.scheme},
|
|
));
|
|
}
|
|
|
|
fn unpackResource(
|
|
f: *Fetch,
|
|
resource: *Resource,
|
|
uri_path: []const u8,
|
|
tmp_directory: Cache.Directory,
|
|
) RunError!void {
|
|
const eb = &f.error_bundle;
|
|
const file_type = switch (resource.*) {
|
|
.file => FileType.fromPath(uri_path) orelse
|
|
return f.fail(f.location_tok, try eb.printString("unknown file type: '{s}'", .{uri_path})),
|
|
|
|
.http_request => |req| ft: {
|
|
// Content-Type takes first precedence.
|
|
const content_type = req.response.content_type orelse
|
|
return f.fail(f.location_tok, try eb.addString("missing 'Content-Type' header"));
|
|
|
|
// Extract the MIME type, ignoring charset and boundary directives
|
|
const mime_type_end = std.mem.indexOf(u8, content_type, ";") orelse content_type.len;
|
|
const mime_type = content_type[0..mime_type_end];
|
|
|
|
if (ascii.eqlIgnoreCase(mime_type, "application/x-tar"))
|
|
break :ft .tar;
|
|
|
|
if (ascii.eqlIgnoreCase(mime_type, "application/gzip") or
|
|
ascii.eqlIgnoreCase(mime_type, "application/x-gzip") or
|
|
ascii.eqlIgnoreCase(mime_type, "application/tar+gzip"))
|
|
{
|
|
break :ft .@"tar.gz";
|
|
}
|
|
|
|
if (ascii.eqlIgnoreCase(mime_type, "application/x-xz"))
|
|
break :ft .@"tar.xz";
|
|
|
|
if (ascii.eqlIgnoreCase(mime_type, "application/zstd"))
|
|
break :ft .@"tar.zst";
|
|
|
|
if (!ascii.eqlIgnoreCase(mime_type, "application/octet-stream") and
|
|
!ascii.eqlIgnoreCase(mime_type, "application/x-compressed"))
|
|
{
|
|
return f.fail(f.location_tok, try eb.printString(
|
|
"unrecognized 'Content-Type' header: '{s}'",
|
|
.{content_type},
|
|
));
|
|
}
|
|
|
|
// Next, the filename from 'content-disposition: attachment' takes precedence.
|
|
if (req.response.content_disposition) |cd_header| {
|
|
break :ft FileType.fromContentDisposition(cd_header) orelse {
|
|
return f.fail(f.location_tok, try eb.printString(
|
|
"unsupported Content-Disposition header value: '{s}' for Content-Type=application/octet-stream",
|
|
.{cd_header},
|
|
));
|
|
};
|
|
}
|
|
|
|
// Finally, the path from the URI is used.
|
|
break :ft FileType.fromPath(uri_path) orelse {
|
|
return f.fail(f.location_tok, try eb.printString(
|
|
"unknown file type: '{s}'",
|
|
.{uri_path},
|
|
));
|
|
};
|
|
},
|
|
|
|
.git => .git_pack,
|
|
|
|
.dir => |dir| return f.recursiveDirectoryCopy(dir, tmp_directory.handle) catch |err| {
|
|
return f.fail(f.location_tok, try eb.printString(
|
|
"unable to copy directory '{s}': {s}",
|
|
.{ uri_path, @errorName(err) },
|
|
));
|
|
},
|
|
};
|
|
|
|
switch (file_type) {
|
|
.tar => try unpackTarball(f, tmp_directory.handle, resource.reader()),
|
|
.@"tar.gz" => {
|
|
const reader = resource.reader();
|
|
var br = std.io.bufferedReaderSize(std.crypto.tls.max_ciphertext_record_len, reader);
|
|
var dcp = std.compress.gzip.decompressor(br.reader());
|
|
try unpackTarball(f, tmp_directory.handle, dcp.reader());
|
|
},
|
|
.@"tar.xz" => {
|
|
const gpa = f.arena.child_allocator;
|
|
const reader = resource.reader();
|
|
var br = std.io.bufferedReaderSize(std.crypto.tls.max_ciphertext_record_len, reader);
|
|
var dcp = std.compress.xz.decompress(gpa, br.reader()) catch |err| {
|
|
return f.fail(f.location_tok, try eb.printString(
|
|
"unable to decompress tarball: {s}",
|
|
.{@errorName(err)},
|
|
));
|
|
};
|
|
defer dcp.deinit();
|
|
try unpackTarball(f, tmp_directory.handle, dcp.reader());
|
|
},
|
|
.@"tar.zst" => {
|
|
const window_size = std.compress.zstd.DecompressorOptions.default_window_buffer_len;
|
|
const window_buffer = try f.arena.allocator().create([window_size]u8);
|
|
const reader = resource.reader();
|
|
var br = std.io.bufferedReaderSize(std.crypto.tls.max_ciphertext_record_len, reader);
|
|
var dcp = std.compress.zstd.decompressor(br.reader(), .{
|
|
.window_buffer = window_buffer,
|
|
});
|
|
return unpackTarball(f, tmp_directory.handle, dcp.reader());
|
|
},
|
|
.git_pack => unpackGitPack(f, tmp_directory.handle, resource) catch |err| switch (err) {
|
|
error.FetchFailed => return error.FetchFailed,
|
|
error.OutOfMemory => return error.OutOfMemory,
|
|
else => |e| return f.fail(f.location_tok, try eb.printString(
|
|
"unable to unpack git files: {s}",
|
|
.{@errorName(e)},
|
|
)),
|
|
},
|
|
}
|
|
}
|
|
|
|
fn unpackTarball(f: *Fetch, out_dir: fs.Dir, reader: anytype) RunError!void {
|
|
const eb = &f.error_bundle;
|
|
const gpa = f.arena.child_allocator;
|
|
|
|
var diagnostics: std.tar.Options.Diagnostics = .{ .allocator = gpa };
|
|
defer diagnostics.deinit();
|
|
|
|
std.tar.pipeToFileSystem(out_dir, reader, .{
|
|
.diagnostics = &diagnostics,
|
|
.strip_components = 1,
|
|
// TODO: we would like to set this to executable_bit_only, but two
|
|
// things need to happen before that:
|
|
// 1. the tar implementation needs to support it
|
|
// 2. the hashing algorithm here needs to support detecting the is_executable
|
|
// bit on Windows from the ACLs (see the isExecutable function).
|
|
.mode_mode = .ignore,
|
|
.exclude_empty_directories = true,
|
|
}) catch |err| return f.fail(f.location_tok, try eb.printString(
|
|
"unable to unpack tarball to temporary directory: {s}",
|
|
.{@errorName(err)},
|
|
));
|
|
|
|
if (diagnostics.errors.items.len > 0) {
|
|
const notes_len: u32 = @intCast(diagnostics.errors.items.len);
|
|
try eb.addRootErrorMessage(.{
|
|
.msg = try eb.addString("unable to unpack tarball"),
|
|
.src_loc = try f.srcLoc(f.location_tok),
|
|
.notes_len = notes_len,
|
|
});
|
|
const notes_start = try eb.reserveNotes(notes_len);
|
|
for (diagnostics.errors.items, notes_start..) |item, note_i| {
|
|
switch (item) {
|
|
.unable_to_create_sym_link => |info| {
|
|
eb.extra.items[note_i] = @intFromEnum(try eb.addErrorMessage(.{
|
|
.msg = try eb.printString("unable to create symlink from '{s}' to '{s}': {s}", .{
|
|
info.file_name, info.link_name, @errorName(info.code),
|
|
}),
|
|
}));
|
|
},
|
|
.unable_to_create_file => |info| {
|
|
eb.extra.items[note_i] = @intFromEnum(try eb.addErrorMessage(.{
|
|
.msg = try eb.printString("unable to create file '{s}': {s}", .{
|
|
info.file_name, @errorName(info.code),
|
|
}),
|
|
}));
|
|
},
|
|
.unsupported_file_type => |info| {
|
|
eb.extra.items[note_i] = @intFromEnum(try eb.addErrorMessage(.{
|
|
.msg = try eb.printString("file '{s}' has unsupported type '{c}'", .{
|
|
info.file_name, @intFromEnum(info.file_type),
|
|
}),
|
|
}));
|
|
},
|
|
}
|
|
}
|
|
return error.FetchFailed;
|
|
}
|
|
}
|
|
|
|
fn unpackGitPack(f: *Fetch, out_dir: fs.Dir, resource: *Resource) anyerror!void {
|
|
const eb = &f.error_bundle;
|
|
const gpa = f.arena.child_allocator;
|
|
const want_oid = resource.git.want_oid;
|
|
const reader = resource.git.fetch_stream.reader();
|
|
// The .git directory is used to store the packfile and associated index, but
|
|
// we do not attempt to replicate the exact structure of a real .git
|
|
// directory, since that isn't relevant for fetching a package.
|
|
{
|
|
var pack_dir = try out_dir.makeOpenPath(".git", .{});
|
|
defer pack_dir.close();
|
|
var pack_file = try pack_dir.createFile("pkg.pack", .{ .read = true });
|
|
defer pack_file.close();
|
|
var fifo = std.fifo.LinearFifo(u8, .{ .Static = 4096 }).init();
|
|
try fifo.pump(reader, pack_file.writer());
|
|
try pack_file.sync();
|
|
|
|
var index_file = try pack_dir.createFile("pkg.idx", .{ .read = true });
|
|
defer index_file.close();
|
|
{
|
|
var index_prog_node = f.prog_node.start("Index pack", 0);
|
|
defer index_prog_node.end();
|
|
index_prog_node.activate();
|
|
var index_buffered_writer = std.io.bufferedWriter(index_file.writer());
|
|
try git.indexPack(gpa, pack_file, index_buffered_writer.writer());
|
|
try index_buffered_writer.flush();
|
|
try index_file.sync();
|
|
}
|
|
|
|
{
|
|
var checkout_prog_node = f.prog_node.start("Checkout", 0);
|
|
defer checkout_prog_node.end();
|
|
checkout_prog_node.activate();
|
|
var repository = try git.Repository.init(gpa, pack_file, index_file);
|
|
defer repository.deinit();
|
|
var diagnostics: git.Diagnostics = .{ .allocator = gpa };
|
|
defer diagnostics.deinit();
|
|
try repository.checkout(out_dir, want_oid, &diagnostics);
|
|
|
|
if (diagnostics.errors.items.len > 0) {
|
|
const notes_len: u32 = @intCast(diagnostics.errors.items.len);
|
|
try eb.addRootErrorMessage(.{
|
|
.msg = try eb.addString("unable to unpack packfile"),
|
|
.src_loc = try f.srcLoc(f.location_tok),
|
|
.notes_len = notes_len,
|
|
});
|
|
const notes_start = try eb.reserveNotes(notes_len);
|
|
for (diagnostics.errors.items, notes_start..) |item, note_i| {
|
|
switch (item) {
|
|
.unable_to_create_sym_link => |info| {
|
|
eb.extra.items[note_i] = @intFromEnum(try eb.addErrorMessage(.{
|
|
.msg = try eb.printString("unable to create symlink from '{s}' to '{s}': {s}", .{
|
|
info.file_name, info.link_name, @errorName(info.code),
|
|
}),
|
|
}));
|
|
},
|
|
}
|
|
}
|
|
return error.InvalidGitPack;
|
|
}
|
|
}
|
|
}
|
|
|
|
try out_dir.deleteTree(".git");
|
|
}
|
|
|
|
fn recursiveDirectoryCopy(f: *Fetch, dir: fs.Dir, tmp_dir: fs.Dir) anyerror!void {
|
|
const gpa = f.arena.child_allocator;
|
|
// Recursive directory copy.
|
|
var it = try dir.walk(gpa);
|
|
defer it.deinit();
|
|
while (try it.next()) |entry| {
|
|
switch (entry.kind) {
|
|
.directory => {}, // omit empty directories
|
|
.file => {
|
|
dir.copyFile(
|
|
entry.path,
|
|
tmp_dir,
|
|
entry.path,
|
|
.{},
|
|
) catch |err| switch (err) {
|
|
error.FileNotFound => {
|
|
if (fs.path.dirname(entry.path)) |dirname| try tmp_dir.makePath(dirname);
|
|
try dir.copyFile(entry.path, tmp_dir, entry.path, .{});
|
|
},
|
|
else => |e| return e,
|
|
};
|
|
},
|
|
.sym_link => {
|
|
var buf: [fs.MAX_PATH_BYTES]u8 = undefined;
|
|
const link_name = try dir.readLink(entry.path, &buf);
|
|
// TODO: if this would create a symlink to outside
|
|
// the destination directory, fail with an error instead.
|
|
tmp_dir.symLink(link_name, entry.path, .{}) catch |err| switch (err) {
|
|
error.FileNotFound => {
|
|
if (fs.path.dirname(entry.path)) |dirname| try tmp_dir.makePath(dirname);
|
|
try tmp_dir.symLink(link_name, entry.path, .{});
|
|
},
|
|
else => |e| return e,
|
|
};
|
|
},
|
|
else => return error.IllegalFileTypeInPackage,
|
|
}
|
|
}
|
|
}
|
|
|
|
pub fn renameTmpIntoCache(
|
|
cache_dir: fs.Dir,
|
|
tmp_dir_sub_path: []const u8,
|
|
dest_dir_sub_path: []const u8,
|
|
) !void {
|
|
assert(dest_dir_sub_path[1] == fs.path.sep);
|
|
var handled_missing_dir = false;
|
|
while (true) {
|
|
cache_dir.rename(tmp_dir_sub_path, dest_dir_sub_path) catch |err| switch (err) {
|
|
error.FileNotFound => {
|
|
if (handled_missing_dir) return err;
|
|
cache_dir.makeDir(dest_dir_sub_path[0..1]) catch |mkd_err| switch (mkd_err) {
|
|
error.PathAlreadyExists => handled_missing_dir = true,
|
|
else => |e| return e,
|
|
};
|
|
continue;
|
|
},
|
|
error.PathAlreadyExists, error.AccessDenied => {
|
|
// Package has been already downloaded and may already be in use on the system.
|
|
cache_dir.deleteTree(tmp_dir_sub_path) catch {
|
|
// Garbage files leftover in zig-cache/tmp/ is, as they say
|
|
// on Star Trek, "operating within normal parameters".
|
|
};
|
|
},
|
|
else => |e| return e,
|
|
};
|
|
break;
|
|
}
|
|
}
|
|
|
|
/// Assumes that files not included in the package have already been filtered
|
|
/// prior to calling this function. This ensures that files not protected by
|
|
/// the hash are not present on the file system. Empty directories are *not
|
|
/// hashed* and must not be present on the file system when calling this
|
|
/// function.
|
|
fn computeHash(
|
|
f: *Fetch,
|
|
tmp_directory: Cache.Directory,
|
|
filter: Filter,
|
|
) RunError!Manifest.Digest {
|
|
// All the path name strings need to be in memory for sorting.
|
|
const arena = f.arena.allocator();
|
|
const gpa = f.arena.child_allocator;
|
|
const eb = &f.error_bundle;
|
|
const thread_pool = f.job_queue.thread_pool;
|
|
|
|
// Collect all files, recursively, then sort.
|
|
var all_files = std.ArrayList(*HashedFile).init(gpa);
|
|
defer all_files.deinit();
|
|
|
|
var deleted_files = std.ArrayList(*DeletedFile).init(gpa);
|
|
defer deleted_files.deinit();
|
|
|
|
// Track directories which had any files deleted from them so that empty directories
|
|
// can be deleted.
|
|
var sus_dirs: std.StringArrayHashMapUnmanaged(void) = .{};
|
|
defer sus_dirs.deinit(gpa);
|
|
|
|
var walker = try tmp_directory.handle.walk(gpa);
|
|
defer walker.deinit();
|
|
|
|
{
|
|
// The final hash will be a hash of each file hashed independently. This
|
|
// allows hashing in parallel.
|
|
var wait_group: WaitGroup = .{};
|
|
// `computeHash` is called from a worker thread so there must not be
|
|
// any waiting without working or a deadlock could occur.
|
|
defer thread_pool.waitAndWork(&wait_group);
|
|
|
|
while (walker.next() catch |err| {
|
|
try eb.addRootErrorMessage(.{ .msg = try eb.printString(
|
|
"unable to walk temporary directory '{}': {s}",
|
|
.{ tmp_directory, @errorName(err) },
|
|
) });
|
|
return error.FetchFailed;
|
|
}) |entry| {
|
|
if (entry.kind == .directory) continue;
|
|
|
|
if (!filter.includePath(entry.path)) {
|
|
// Delete instead of including in hash calculation.
|
|
const fs_path = try arena.dupe(u8, entry.path);
|
|
|
|
// Also track the parent directory in case it becomes empty.
|
|
if (fs.path.dirname(fs_path)) |parent|
|
|
try sus_dirs.put(gpa, parent, {});
|
|
|
|
const deleted_file = try arena.create(DeletedFile);
|
|
deleted_file.* = .{
|
|
.fs_path = fs_path,
|
|
.failure = undefined, // to be populated by the worker
|
|
};
|
|
wait_group.start();
|
|
try thread_pool.spawn(workerDeleteFile, .{
|
|
tmp_directory.handle, deleted_file, &wait_group,
|
|
});
|
|
try deleted_files.append(deleted_file);
|
|
continue;
|
|
}
|
|
|
|
const kind: HashedFile.Kind = switch (entry.kind) {
|
|
.directory => unreachable,
|
|
.file => .file,
|
|
.sym_link => .link,
|
|
else => return f.fail(f.location_tok, try eb.printString(
|
|
"package contains '{s}' which has illegal file type '{s}'",
|
|
.{ entry.path, @tagName(entry.kind) },
|
|
)),
|
|
};
|
|
|
|
if (std.mem.eql(u8, entry.path, Package.build_zig_basename))
|
|
f.has_build_zig = true;
|
|
|
|
const fs_path = try arena.dupe(u8, entry.path);
|
|
const hashed_file = try arena.create(HashedFile);
|
|
hashed_file.* = .{
|
|
.fs_path = fs_path,
|
|
.normalized_path = try normalizePathAlloc(arena, fs_path),
|
|
.kind = kind,
|
|
.hash = undefined, // to be populated by the worker
|
|
.failure = undefined, // to be populated by the worker
|
|
};
|
|
wait_group.start();
|
|
try thread_pool.spawn(workerHashFile, .{
|
|
tmp_directory.handle, hashed_file, &wait_group,
|
|
});
|
|
try all_files.append(hashed_file);
|
|
}
|
|
}
|
|
|
|
{
|
|
// Sort by length, descending, so that child directories get removed first.
|
|
sus_dirs.sortUnstable(@as(struct {
|
|
keys: []const []const u8,
|
|
pub fn lessThan(ctx: @This(), a_index: usize, b_index: usize) bool {
|
|
return ctx.keys[b_index].len < ctx.keys[a_index].len;
|
|
}
|
|
}, .{ .keys = sus_dirs.keys() }));
|
|
|
|
// During this loop, more entries will be added, so we must loop by index.
|
|
var i: usize = 0;
|
|
while (i < sus_dirs.count()) : (i += 1) {
|
|
const sus_dir = sus_dirs.keys()[i];
|
|
tmp_directory.handle.deleteDir(sus_dir) catch |err| switch (err) {
|
|
error.DirNotEmpty => continue,
|
|
error.FileNotFound => continue,
|
|
else => |e| {
|
|
try eb.addRootErrorMessage(.{ .msg = try eb.printString(
|
|
"unable to delete empty directory '{s}': {s}",
|
|
.{ sus_dir, @errorName(e) },
|
|
) });
|
|
return error.FetchFailed;
|
|
},
|
|
};
|
|
if (fs.path.dirname(sus_dir)) |parent| {
|
|
try sus_dirs.put(gpa, parent, {});
|
|
}
|
|
}
|
|
}
|
|
|
|
std.mem.sortUnstable(*HashedFile, all_files.items, {}, HashedFile.lessThan);
|
|
|
|
var hasher = Manifest.Hash.init(.{});
|
|
var any_failures = false;
|
|
for (all_files.items) |hashed_file| {
|
|
hashed_file.failure catch |err| {
|
|
any_failures = true;
|
|
try eb.addRootErrorMessage(.{
|
|
.msg = try eb.printString("unable to hash '{s}': {s}", .{
|
|
hashed_file.fs_path, @errorName(err),
|
|
}),
|
|
});
|
|
};
|
|
hasher.update(&hashed_file.hash);
|
|
}
|
|
for (deleted_files.items) |deleted_file| {
|
|
deleted_file.failure catch |err| {
|
|
any_failures = true;
|
|
try eb.addRootErrorMessage(.{
|
|
.msg = try eb.printString("failed to delete excluded path '{s}' from package: {s}", .{
|
|
deleted_file.fs_path, @errorName(err),
|
|
}),
|
|
});
|
|
};
|
|
}
|
|
|
|
if (any_failures) return error.FetchFailed;
|
|
|
|
if (f.job_queue.debug_hash) {
|
|
assert(!f.job_queue.recursive);
|
|
// Print something to stdout that can be text diffed to figure out why
|
|
// the package hash is different.
|
|
dumpHashInfo(all_files.items) catch |err| {
|
|
std.debug.print("unable to write to stdout: {s}\n", .{@errorName(err)});
|
|
std.process.exit(1);
|
|
};
|
|
}
|
|
|
|
return hasher.finalResult();
|
|
}
|
|
|
|
fn dumpHashInfo(all_files: []const *const HashedFile) !void {
|
|
const stdout = std.io.getStdOut();
|
|
var bw = std.io.bufferedWriter(stdout.writer());
|
|
const w = bw.writer();
|
|
|
|
for (all_files) |hashed_file| {
|
|
try w.print("{s}: {s}: {s}\n", .{
|
|
@tagName(hashed_file.kind),
|
|
std.fmt.fmtSliceHexLower(&hashed_file.hash),
|
|
hashed_file.normalized_path,
|
|
});
|
|
}
|
|
|
|
try bw.flush();
|
|
}
|
|
|
|
fn workerHashFile(dir: fs.Dir, hashed_file: *HashedFile, wg: *WaitGroup) void {
|
|
defer wg.finish();
|
|
hashed_file.failure = hashFileFallible(dir, hashed_file);
|
|
}
|
|
|
|
fn workerDeleteFile(dir: fs.Dir, deleted_file: *DeletedFile, wg: *WaitGroup) void {
|
|
defer wg.finish();
|
|
deleted_file.failure = deleteFileFallible(dir, deleted_file);
|
|
}
|
|
|
|
fn hashFileFallible(dir: fs.Dir, hashed_file: *HashedFile) HashedFile.Error!void {
|
|
var buf: [8000]u8 = undefined;
|
|
var hasher = Manifest.Hash.init(.{});
|
|
hasher.update(hashed_file.normalized_path);
|
|
switch (hashed_file.kind) {
|
|
.file => {
|
|
var file = try dir.openFile(hashed_file.fs_path, .{});
|
|
defer file.close();
|
|
hasher.update(&.{ 0, @intFromBool(try isExecutable(file)) });
|
|
while (true) {
|
|
const bytes_read = try file.read(&buf);
|
|
if (bytes_read == 0) break;
|
|
hasher.update(buf[0..bytes_read]);
|
|
}
|
|
},
|
|
.link => {
|
|
const link_name = try dir.readLink(hashed_file.fs_path, &buf);
|
|
if (fs.path.sep != canonical_sep) {
|
|
// Package hashes are intended to be consistent across
|
|
// platforms which means we must normalize path separators
|
|
// inside symlinks.
|
|
normalizePath(link_name);
|
|
}
|
|
hasher.update(link_name);
|
|
},
|
|
}
|
|
hasher.final(&hashed_file.hash);
|
|
}
|
|
|
|
fn deleteFileFallible(dir: fs.Dir, deleted_file: *DeletedFile) DeletedFile.Error!void {
|
|
try dir.deleteFile(deleted_file.fs_path);
|
|
}
|
|
|
|
fn isExecutable(file: fs.File) !bool {
|
|
if (builtin.os.tag == .windows) {
|
|
// TODO check the ACL on Windows.
|
|
// Until this is implemented, this could be a false negative on
|
|
// Windows, which is why we do not yet set executable_bit_only above
|
|
// when unpacking the tarball.
|
|
return false;
|
|
} else {
|
|
const stat = try file.stat();
|
|
return (stat.mode & std.os.S.IXUSR) != 0;
|
|
}
|
|
}
|
|
|
|
const DeletedFile = struct {
|
|
fs_path: []const u8,
|
|
failure: Error!void,
|
|
|
|
const Error =
|
|
fs.Dir.DeleteFileError ||
|
|
fs.Dir.DeleteDirError;
|
|
};
|
|
|
|
const HashedFile = struct {
|
|
fs_path: []const u8,
|
|
normalized_path: []const u8,
|
|
hash: Manifest.Digest,
|
|
failure: Error!void,
|
|
kind: Kind,
|
|
|
|
const Error =
|
|
fs.File.OpenError ||
|
|
fs.File.ReadError ||
|
|
fs.File.StatError ||
|
|
fs.Dir.ReadLinkError;
|
|
|
|
const Kind = enum { file, link };
|
|
|
|
fn lessThan(context: void, lhs: *const HashedFile, rhs: *const HashedFile) bool {
|
|
_ = context;
|
|
return std.mem.lessThan(u8, lhs.normalized_path, rhs.normalized_path);
|
|
}
|
|
};
|
|
|
|
/// Make a file system path identical independently of operating system path inconsistencies.
|
|
/// This converts backslashes into forward slashes.
|
|
fn normalizePathAlloc(arena: Allocator, fs_path: []const u8) ![]const u8 {
|
|
if (fs.path.sep == canonical_sep) return fs_path;
|
|
const normalized = try arena.dupe(u8, fs_path);
|
|
normalizePath(normalized);
|
|
return normalized;
|
|
}
|
|
|
|
const canonical_sep = fs.path.sep_posix;
|
|
|
|
fn normalizePath(bytes: []u8) void {
|
|
assert(fs.path.sep != canonical_sep);
|
|
std.mem.replaceScalar(u8, bytes, fs.path.sep, canonical_sep);
|
|
}
|
|
|
|
const Filter = struct {
|
|
include_paths: std.StringArrayHashMapUnmanaged(void) = .{},
|
|
|
|
/// sub_path is relative to the package root.
|
|
pub fn includePath(self: Filter, sub_path: []const u8) bool {
|
|
if (self.include_paths.count() == 0) return true;
|
|
if (self.include_paths.contains("")) return true;
|
|
if (self.include_paths.contains(".")) return true;
|
|
if (self.include_paths.contains(sub_path)) return true;
|
|
|
|
// Check if any included paths are parent directories of sub_path.
|
|
var dirname = sub_path;
|
|
while (std.fs.path.dirname(dirname)) |next_dirname| {
|
|
if (self.include_paths.contains(next_dirname)) return true;
|
|
dirname = next_dirname;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
test includePath {
|
|
const gpa = std.testing.allocator;
|
|
var filter: Filter = .{};
|
|
defer filter.include_paths.deinit(gpa);
|
|
|
|
try filter.include_paths.put(gpa, "src", {});
|
|
try std.testing.expect(filter.includePath("src/core/unix/SDL_poll.c"));
|
|
try std.testing.expect(!filter.includePath(".gitignore"));
|
|
}
|
|
};
|
|
|
|
pub fn depDigest(
|
|
pkg_root: Package.Path,
|
|
cache_root: Cache.Directory,
|
|
dep: Manifest.Dependency,
|
|
) ?Manifest.MultiHashHexDigest {
|
|
if (dep.hash) |h| return h[0..Manifest.multihash_hex_digest_len].*;
|
|
|
|
switch (dep.location) {
|
|
.url => return null,
|
|
.path => |rel_path| {
|
|
var buf: [fs.MAX_PATH_BYTES]u8 = undefined;
|
|
var fba = std.heap.FixedBufferAllocator.init(&buf);
|
|
const new_root = pkg_root.resolvePosix(fba.allocator(), rel_path) catch
|
|
return null;
|
|
return relativePathDigest(new_root, cache_root);
|
|
},
|
|
}
|
|
}
|
|
|
|
// These are random bytes.
|
|
const package_hash_prefix_cached = [8]u8{ 0x53, 0x7e, 0xfa, 0x94, 0x65, 0xe9, 0xf8, 0x73 };
|
|
const package_hash_prefix_project = [8]u8{ 0xe1, 0x25, 0xee, 0xfa, 0xa6, 0x17, 0x38, 0xcc };
|
|
|
|
const builtin = @import("builtin");
|
|
const std = @import("std");
|
|
const fs = std.fs;
|
|
const assert = std.debug.assert;
|
|
const ascii = std.ascii;
|
|
const Allocator = std.mem.Allocator;
|
|
const Cache = std.Build.Cache;
|
|
const ThreadPool = std.Thread.Pool;
|
|
const WaitGroup = std.Thread.WaitGroup;
|
|
const Fetch = @This();
|
|
const main = @import("../main.zig");
|
|
const git = @import("Fetch/git.zig");
|
|
const Package = @import("../Package.zig");
|
|
const Manifest = Package.Manifest;
|
|
const ErrorBundle = std.zig.ErrorBundle;
|
|
|
|
test {
|
|
_ = Filter;
|
|
_ = FileType;
|
|
}
|