From 876ab99f5c462e93296ef0b2f642ac2243acb31c Mon Sep 17 00:00:00 2001
From: Andrew Kelley <andrew@ziglang.org>
Date: Tue, 10 Jan 2023 11:15:09 -0700
Subject: [PATCH] disable package manager code when bootstrapping

This makes building from source go faster and avoids tripping over
unimplemented things in the C backend.
---
 build.zig            |  1 +
 src/main.zig         | 22 ++++++++++++----------
 stage1/config.zig.in |  1 +
 3 files changed, 14 insertions(+), 10 deletions(-)

diff --git a/build.zig b/build.zig
index f37b44aa96..71741a0136 100644
--- a/build.zig
+++ b/build.zig
@@ -185,6 +185,7 @@ pub fn build(b: *Builder) !void {
     exe_options.addOption(bool, "llvm_has_arc", llvm_has_arc);
     exe_options.addOption(bool, "force_gpa", force_gpa);
     exe_options.addOption(bool, "only_c", only_c);
+    exe_options.addOption(bool, "omit_pkg_fetching_code", false);
 
     if (link_libc) {
         exe.linkLibC();
diff --git a/src/main.zig b/src/main.zig
index 8741b4441c..d0052b518b 100644
--- a/src/main.zig
+++ b/src/main.zig
@@ -4083,17 +4083,19 @@ pub fn cmdBuild(gpa: Allocator, arena: Allocator, args: []const []const u8) !voi
         try thread_pool.init(gpa);
         defer thread_pool.deinit();
 
-        var http_client: std.http.Client = .{ .allocator = gpa };
-        defer http_client.deinit();
-        try http_client.rescanRootCertificates();
+        if (!build_options.omit_pkg_fetching_code) {
+            var http_client: std.http.Client = .{ .allocator = gpa };
+            defer http_client.deinit();
+            try http_client.rescanRootCertificates();
 
-        try main_pkg.fetchAndAddDependencies(
-            &thread_pool,
-            &http_client,
-            build_directory,
-            global_cache_directory,
-            local_cache_directory,
-        );
+            try main_pkg.fetchAndAddDependencies(
+                &thread_pool,
+                &http_client,
+                build_directory,
+                global_cache_directory,
+                local_cache_directory,
+            );
+        }
 
         const comp = Compilation.create(gpa, .{
             .zig_lib_directory = zig_lib_directory,
diff --git a/stage1/config.zig.in b/stage1/config.zig.in
index 68d09f159b..ab55defd70 100644
--- a/stage1/config.zig.in
+++ b/stage1/config.zig.in
@@ -12,3 +12,4 @@ pub const have_stage1 = false;
 pub const skip_non_native = false;
 pub const only_c = false;
 pub const force_gpa = false;
+pub const omit_pkg_fetching_code = true;