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Compilation: don't warn about failure to delete missing C depfile

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If clang encountered bad imports, the depfile will not be generated. It
doesn't make sense to warn the user in this case. In fact,
`FileNotFound` is never worth warning about here; it just means that
the file we were deleting to save space isn't there in the first place!
If the missing file actually affected the compilation (e.g. another
process raced to delete it for some reason) we would already error in
the normal code path which reads these files, so we can safely omit the
warning in the `FileNotFound` case always, only warning when the file
might still exist.

To see what this fixes, create the following file...

```c
#include <nonexist>
```

...and run `zig build-obj` on it. Before this commit, you will get a
redundant warning; after this commit, that warning is gone.
This commit is contained in:
mlugg 2025-05-09 04:57:58 +01:00 • committed by Matthew Lugg
parent a5cfa3db3a
commit 787020b30b
1 changed files with 6 additions and 4 deletions
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10
src/Compilation.zig
View file

@ -5174,11 +5174,13 @@ fn updateCObject(comp: *Compilation, c_object: *CObject, c_obj_prog_node: std.Pr
}
// Just to save disk space, we delete the files that are never needed again.
defer if (out_diag_path) |diag_file_path| zig_cache_tmp_dir.deleteFile(std.fs.path.basename(diag_file_path)) catch |err| {
log.warn("failed to delete '{s}': {s}", .{ diag_file_path, @errorName(err) });
defer if (out_diag_path) |diag_file_path| zig_cache_tmp_dir.deleteFile(std.fs.path.basename(diag_file_path)) catch |err| switch (err) {
error.FileNotFound => {}, // the file wasn't created due to an error we reported
else => log.warn("failed to delete '{s}': {s}", .{ diag_file_path, @errorName(err) }),
};
defer if (out_dep_path) |dep_file_path| zig_cache_tmp_dir.deleteFile(std.fs.path.basename(dep_file_path)) catch |err| {
log.warn("failed to delete '{s}': {s}", .{ dep_file_path, @errorName(err) });
defer if (out_dep_path) |dep_file_path| zig_cache_tmp_dir.deleteFile(std.fs.path.basename(dep_file_path)) catch |err| switch (err) {
error.FileNotFound => {}, // the file wasn't created due to an error we reported
else => log.warn("failed to delete '{s}': {s}", .{ dep_file_path, @errorName(err) }),
};
if (std.process.can_spawn) {
var child = std.process.Child.init(argv.items, arena);