fix: add repo mapping to tar archive

When using bzlmod, runfiles lookup will fail without it.

lib/private/tar.bzl

@@ -147,12 +147,19 @@ def _tar_impl(ctx):
  args.add(ctx.file.mtree, format = "@%s")
  inputs.append(ctx.file.mtree)
 
+ src_runfiles = []
+ for src in ctx.attr.srcs:
+ src_di = src[DefaultInfo]
+ if hasattr(src_di.files_to_run, "repo_mapping_manifest"):
+ src_runfiles.append(depset(
+ direct = [src_di.files_to_run.repo_mapping_manifest],
+ transitive = [src_di.default_runfiles.files],
+ ))
+ else:
+ src_runfiles.append(src_di.default_runfiles.files)
  ctx.actions.run(
  executable = bsdtar.tarinfo.binary,
- inputs = depset(direct = inputs, transitive = [bsdtar.default.files] + [
- src[DefaultInfo].default_runfiles.files
- for src in ctx.attr.srcs
- ]),
+ inputs = depset(direct = inputs, transitive = [bsdtar.default.files] + src_runfiles),
  outputs = [out],
  arguments = [args],
  mnemonic = "Tar",
@@ -234,6 +241,8 @@ def _mtree_impl(ctx):
  workspace_name = str(ctx.workspace_name)
 
  content.add(_mtree_line(runfiles_dir, type = "dir"))
+ if (hasattr(default_info.files_to_run, "repo_mapping_manifest")):
+ content.add(_mtree_line("{}/_repo_mapping".format(runfiles_dir), type = "file", content = default_info.files_to_run.repo_mapping_manifest.path))
  content.add_all(
  s.default_runfiles.files,
  expand_directories = True,