pw_build: Fall back to copying if linking fails
Fall back to copying in mirror_tree if hard linking fails.
Change-Id: I2023f29a7576141a93fdebea81042b259e06d05f
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/42440
Pigweed-Auto-Submit: Rob Mohr <mohrr@google.com>
Commit-Queue: Auto-Submit <auto-submit@pigweed.google.com.iam.gserviceaccount.com>
Reviewed-by: (☞ﾟ∀ﾟ)☞ Tennessee Carmel-Veilleux <tennessee@google.com>
diff --git a/pw_build/py/pw_build/mirror_tree.py b/pw_build/py/pw_build/mirror_tree.py
index ef7e455..a1a74b2 100644
--- a/pw_build/py/pw_build/mirror_tree.py
+++ b/pw_build/py/pw_build/mirror_tree.py
@@ -16,6 +16,7 @@
import argparse
import os
from pathlib import Path
+import shutil
from typing import Iterable, Iterator, List
@@ -54,9 +55,20 @@
# Use a hard link to avoid unnecessary copies. Resolve the source before
# linking in case it is a symlink.
- os.link(source.resolve(), dest)
+ source = source.resolve()
+ try:
+ os.link(source, dest)
+ yield dest
- yield dest
+ # If the link failed try copying. If copying fails re-raise the
+ # original exception.
+ except OSError:
+ try:
+ shutil.copy(source, dest)
+ yield dest
+ except OSError:
+ pass
+ raise
def _link_files_or_dirs(paths: Iterable[Path],
