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Add the CACHEDIR.TAG file to the cache directory #14875

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Add the CACHEDIR.TAG file to the cache directory #14875

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e5dce8a
Add the CACHEDIR.TAG file to the cache directory
perillo Mar 10, 2023
f8f4d53
Merge branch 'master' into tag-cache-directory
perillo Mar 23, 2023
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17 changes: 17 additions & 0 deletions src/main.zig
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Original file line number Diff line number Diff line change
Expand Up @@ -680,6 +680,21 @@ const Listen = union(enum) {
stdio,
};

/// Add the CACHEDIR.TAG file to the cache directory.
/// See http://www.brynosaurus.com/cachedir/.
fn tagCacheDirectory(dir: fs.Dir) !void {
const bytes =
\\Signature: 8a477f597d28d172789f06886806bc55
\\# This file is a cache directory tag created by Zig.
\\# For information about cache directory tags, see:
\\# http://www.brynosaurus.com/cachedir/
;
const file = try dir.createFile("CACHEDIR.TAG", .{});
defer file.close();

try file.writeAll(bytes);
}

fn buildOutputType(
gpa: Allocator,
arena: Allocator,
Expand Down Expand Up @@ -3062,6 +3077,7 @@ fn buildOutputType(
};
};
defer global_cache_directory.handle.close();
try tagCacheDirectory(global_cache_directory.handle);

var cleanup_local_cache_dir: ?fs.Dir = null;
defer if (cleanup_local_cache_dir) |*dir| dir.close();
Expand Down Expand Up @@ -3106,6 +3122,7 @@ fn buildOutputType(
// so we utilize the global one.
break :l global_cache_directory;
};
try tagCacheDirectory(local_cache_directory.handle);

if (build_options.have_llvm and emit_asm != .no) {
// LLVM has no way to set this non-globally.
Expand Down