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nixpkgs/nixos/modules/installer/tools/get-version-suffix
2013-10-10 13:28:22 +02:00

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