runCommand: git: repository: branch:
import (runCommand "head-revision"
{ buildInputs = [ git ];
dummy = builtins.currentTime;
}
''
rev=$(git ls-remote ${repository} | grep "refs/${branch}$" | awk '{ print $1 }')
echo "[ \"$rev\" ]" > $out
echo Latest revision in ${branch} is $rev
'')
