depot/third_party/nixpkgs/nixos/modules/installer/tools/get-version-suffix
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GitOrigin-RevId: 4a01ca36d6bfc133bc617e661916a81327c9bbc8
2022-07-14 08:49:19 -04:00

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getVersion() {
local dir="$1"
rev=
gitDir="$dir/.git"
if [ -e "$gitDir" ]; then
if [ -z "$(type -P git)" ]; then
echo "warning: Git not found; cannot figure out revision of $dir" >&2
return
fi
cd "$dir"
rev=$(git --git-dir="$gitDir" rev-parse --short HEAD)
if git --git-dir="$gitDir" describe --always --dirty | grep -q dirty; then
rev+=M
fi
fi
}
if nixpkgs=$(nix-instantiate --find-file nixpkgs "$@"); then
getVersion $nixpkgs
if [ -n "$rev" ]; then
echo ".git.$rev"
fi
fi