nixos / scripts / for-each-ref.rcsh

#!/usr/bin/env rc

flag e +

current_ref=`{
  git symbolic-ref --short -q HEAD \
    || git describe --tags --exact-match >[2]/dev/null \
    || git rev-parse --short HEAD
}

root=`{git rev-parse --show-toplevel}

fn log {
    echo $"* >[1=2] #"
}

log Preserving current symbolic ref to return to later: $current_ref

rev_range=$1
shift

revlist=`{git rev-list $rev_range --reverse}

for (rev in $revlist) {
    echo Checking out $rev
    # Checkout the ref
    git checkout $rev
    # Execute the argument
    for (command in $*) {
        eval $command
    }
    git restore $root
}

log Done!
git checkout $current_ref