git.bzl: fall back to full clone if shallow options are not supported
The `--shallow-since` option of git was introduced only in version 2.11 of git. However,
some widely used distributions ship older versions of git. So fall back to fully cloning
or fetching a repository if the respective shallow option is not know to the ambient git
command used.
Change-Id: I8f0aa0a12e294ff9cc8325975bd9333f6bf50939
PiperOrigin-RevId: 197863797
diff --git a/tools/build_defs/repo/git.bzl b/tools/build_defs/repo/git.bzl
index 22026e8..c522956 100644
--- a/tools/build_defs/repo/git.bzl
+++ b/tools/build_defs/repo/git.bzl
@@ -46,10 +46,10 @@
( cd {working_dir} &&
if ! ( cd '{dir_link}' && [[ "$(git rev-parse --git-dir)" == '.git' ]] ) >/dev/null 2>&1; then
rm -rf '{directory}' '{dir_link}'
- git clone {shallow} '{remote}' '{directory}'
+ git clone {shallow} '{remote}' '{directory}' || git clone '{remote}' '{directory}'
fi
cd '{directory}'
- git reset --hard {ref} || (git fetch {shallow} origin {ref}:{ref} && git reset --hard {ref})
+ git reset --hard {ref} || ((git fetch {shallow} origin {ref}:{ref} || git fetch origin {ref}:{ref}) && git reset --hard {ref})
git clean -xdf )
""".format(
working_dir=ctx.path('.').dirname,
