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std.Build.Step.Run: convert relative paths to be relative to child cwd

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Because any `LazyPath` might be resolved to a relative path, it's
incorrect to pass that directly to a child process whose cwd might
differ. Instead, if the child has an overriden cwd, we need to convert
such paths to be relative to the child cwd using `std.fs.path.relative`.
This commit is contained in:
mlugg 2025-06-05 13:23:20 +01:00
parent 5c8b92db7f
commit 14e033ed95
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GPG key ID: 3F5B7DCCBF4AF02E
1 changed files with 46 additions and 22 deletions
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68
lib/std/Build/Step/Run.zig
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@ -622,6 +622,18 @@ fn checksContainStderr(checks: []const StdIo.Check) bool {
return false;
}
/// If `path` is cwd-relative, make it relative to the cwd of the child instead.
///
/// Whenever a path is included in the argv of a child, it should be put through this function first
/// to make sure the child doesn't see paths relative to a cwd other than its own.
fn convertPathArg(run: *Run, path: Build.Cache.Path) []const u8 {
const b = run.step.owner;
const path_str = path.toString(b.graph.arena) catch @panic("OOM");
const child_lazy_cwd = run.cwd orelse return path_str;
const child_cwd = child_lazy_cwd.getPath3(b, &run.step).toString(b.graph.arena) catch @panic("OOM");
return std.fs.path.relative(b.graph.arena, child_cwd, path_str) catch @panic("OOM");
}
const IndexedOutput = struct {
index: usize,
tag: @typeInfo(Arg).@"union".tag_type.?,
@ -676,14 +688,14 @@ fn make(step: *Step, options: Step.MakeOptions) !void {
man.hash.addBytes(bytes);
},
.lazy_path => |file| {
const file_path = file.lazy_path.getPath2(b, step);
try argv_list.append(b.fmt("{s}{s}", .{ file.prefix, file_path }));
const file_path = file.lazy_path.getPath3(b, step);
try argv_list.append(b.fmt("{s}{s}", .{ file.prefix, run.convertPathArg(file_path) }));
man.hash.addBytes(file.prefix);
_ = try man.addFile(file_path, null);
_ = try man.addFilePath(file_path, null);
},
.decorated_directory => |dd| {
const file_path = dd.lazy_path.getPath3(b, step);
const resolved_arg = b.fmt("{s}{}{s}", .{ dd.prefix, file_path, dd.suffix });
const resolved_arg = b.fmt("{s}{s}{s}", .{ dd.prefix, run.convertPathArg(file_path), dd.suffix });
try argv_list.append(resolved_arg);
man.hash.addBytes(resolved_arg);
},
@ -696,7 +708,10 @@ fn make(step: *Step, options: Step.MakeOptions) !void {
}
const file_path = artifact.installed_path orelse artifact.generated_bin.?.path.?;
try argv_list.append(b.fmt("{s}{s}", .{ pa.prefix, file_path }));
try argv_list.append(b.fmt("{s}{s}", .{
pa.prefix,
run.convertPathArg(.{ .root_dir = .cwd(), .sub_path = file_path }),
}));
_ = try man.addFile(file_path, null);
},
@ -787,11 +802,14 @@ fn make(step: *Step, options: Step.MakeOptions) !void {
b.cache_root, output_sub_dir_path, @errorName(err),
});
};
const output_path = placeholder.output.generated_file.path.?;
const arg_output_path = run.convertPathArg(.{
.root_dir = .cwd(),
.sub_path = placeholder.output.generated_file.getPath(),
});
argv_list.items[placeholder.index] = if (placeholder.output.prefix.len == 0)
output_path
arg_output_path
else
b.fmt("{s}{s}", .{ placeholder.output.prefix, output_path });
b.fmt("{s}{s}", .{ placeholder.output.prefix, arg_output_path });
}
try runCommand(run, argv_list.items, has_side_effects, output_dir_path, prog_node, null);
@ -816,12 +834,15 @@ fn make(step: *Step, options: Step.MakeOptions) !void {
b.cache_root, output_sub_dir_path, @errorName(err),
});
};
const output_path = try b.cache_root.join(arena, &output_components);
placeholder.output.generated_file.path = output_path;
argv_list.items[placeholder.index] = if (placeholder.output.prefix.len == 0)
output_path
else
b.fmt("{s}{s}", .{ placeholder.output.prefix, output_path });
const raw_output_path: Build.Cache.Path = .{
.root_dir = b.cache_root,
.sub_path = b.pathJoin(&output_components),
};
placeholder.output.generated_file.path = raw_output_path.toString(b.graph.arena) catch @panic("OOM");
argv_list.items[placeholder.index] = b.fmt("{s}{s}", .{
placeholder.output.prefix,
run.convertPathArg(raw_output_path),
});
}
try runCommand(run, argv_list.items, has_side_effects, tmp_dir_path, prog_node, null);
@ -899,20 +920,23 @@ pub fn rerunInFuzzMode(
try argv_list.append(arena, bytes);
},
.lazy_path => |file| {
const file_path = file.lazy_path.getPath2(b, step);
try argv_list.append(arena, b.fmt("{s}{s}", .{ file.prefix, file_path }));
const file_path = file.lazy_path.getPath3(b, step);
try argv_list.append(arena, b.fmt("{s}{s}", .{ file.prefix, run.convertPathArg(file_path) }));
},
.decorated_directory => |dd| {
const file_path = dd.lazy_path.getPath3(b, step);
try argv_list.append(arena, b.fmt("{s}{}{s}", .{ dd.prefix, file_path, dd.suffix }));
try argv_list.append(arena, b.fmt("{s}{s}{s}", .{ dd.prefix, run.convertPathArg(file_path), dd.suffix }));
},
.artifact => |pa| {
const artifact = pa.artifact;
const file_path = if (artifact == run.producer.?)
b.fmt("{}", .{run.rebuilt_executable.?})
else
(artifact.installed_path orelse artifact.generated_bin.?.path.?);
try argv_list.append(arena, b.fmt("{s}{s}", .{ pa.prefix, file_path }));
const file_path: []const u8 = p: {
if (artifact == run.producer.?) break :p b.fmt("{}", .{run.rebuilt_executable.?});
break :p artifact.installed_path orelse artifact.generated_bin.?.path.?;
};
try argv_list.append(arena, b.fmt("{s}{s}", .{
pa.prefix,
run.convertPathArg(.{ .root_dir = .cwd(), .sub_path = file_path }),
}));
},
.output_file, .output_directory => unreachable,
}