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doc: mention zig can't use URLs if their content changes

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There's been some proliferation of dependency URLs that reference
mutable data such as links to git branches that can change.  This has
resulted in broken projects, i.e.

* 9eef9de94c/build.zig.zon
* 4b64353e9c

There's also disagreement about whether it's fine for URL's to point to
git branches, i.e.

https://github.com/Not-Nik/raylib-zig/pull/130

This updates the docs to mention that zig won't be able to use URLs if
their content changes.
This commit is contained in:
Jonathan Marler 2024-08-17 19:29:26 -06:00 committed by Andrew Kelley
parent 0ff0bdb4a7
commit 77c63ac360
2 changed files with 4 additions and 2 deletions
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3
doc/build.zig.zon.md
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@ -47,7 +47,8 @@ String.
When updating this field to a new URL, be sure to delete the corresponding When updating this field to a new URL, be sure to delete the corresponding
`hash`, otherwise you are communicating that you expect to find the old hash at `hash`, otherwise you are communicating that you expect to find the old hash at
the new URL. the new URL. If the contents of a URL change this will result in a hash mismatch
which will prevent zig from using it.
#### `hash` #### `hash`

3
lib/init/build.zig.zon
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@ -27,7 +27,8 @@
//.example = .{ //.example = .{
// // When updating this field to a new URL, be sure to delete the corresponding // // When updating this field to a new URL, be sure to delete the corresponding
// // `hash`, otherwise you are communicating that you expect to find the old hash at // // `hash`, otherwise you are communicating that you expect to find the old hash at
// // the new URL. // // the new URL. If the contents of a URL change this will result in a hash mismatch
// // which will prevent zig from using it.
// .url = "https://example.com/foo.tar.gz", // .url = "https://example.com/foo.tar.gz",
// //
// // This is computed from the file contents of the directory of files that is // // This is computed from the file contents of the directory of files that is