Bug 1856347: Allow copy_contents to take an optional parameter ignore_dangling_symlinks r=gbrown

Differential Revision: https://phabricator.services.mozilla.com/D189855

python/mozbuild/mozbuild/vendor/vendor_manifest.py

@@ -470,7 +470,9 @@ class VendorManifest(MozbuildObject):
                 # GitLab puts everything down a directory; move it up.
                 if has_prefix:
                     tardir = mozpath.join(tmpextractdir.name, one_prefix)
-                    mozfile.copy_contents(tardir, tmpextractdir.name)
+                    mozfile.copy_contents(
+                        tardir, tmpextractdir.name, ignore_dangling_symlinks=True
+                    )
                     mozfile.remove(tardir)
 
                 if self.should_perform_step("include"):

testing/mozbase/mozfile/mozfile/mozfile.py

@@ -305,7 +305,7 @@ def remove(path):
         _call_with_windows_retry(shutil.rmtree, (path,))
 
 
-def copy_contents(srcdir, dstdir):
+def copy_contents(srcdir, dstdir, ignore_dangling_symlinks=False):
     """
     Copy the contents of the srcdir into the dstdir, preserving
     subdirectories.
@@ -346,7 +346,12 @@ def copy_contents(srcdir, dstdir):
         if errors:
             raise Exception(errors)
     else:
-        shutil.copytree(srcdir, dstdir, dirs_exist_ok=True)
+        shutil.copytree(
+            srcdir,
+            dstdir,
+            dirs_exist_ok=True,
+            ignore_dangling_symlinks=ignore_dangling_symlinks,
+        )
 
 
 def move(src, dst):