run a command for every commit in a branch

git-for-each

#!/usr/bin/env sh
branch=$1
cmd=$2

usage() {
  echo "git-for-each [-h] branch command"
  echo "  => run a command for each commit in branch (off master)";
}

for_each() {
  for commit in $(git log --pretty=oneline --no-merges master..$branch | awk '{ print $1 }')
  do
    git checkout $commit > /dev/null 2>&1

    if [ "$?" -gt 0 ]; then
      echo "git checkout $commit failed (aborting)."
      echo "do you have diffs preventing a clean checkout?"
      exit 1
    fi

    echo "starting: $commit"

    eval $cmd > /dev/null 2>&1

    status=$?

    git checkout $branch > /dev/null 2>&1

    if [ "$?" -gt 0 ]; then
      echo "git checkout $branch failed (aborting)."
      exit 1
    fi

    if [ "$status" -gt 0 ]; then
      echo "failed"
    else
      echo "succeeded"
    fi
  done
}

run() {
  if [ "$branch" = "--help" ] || [ "$branch" = "-h" ] ; then
    usage; exit;
  fi

  if [ -z "${branch}" ]; then
    echo "branch is empty\n"; usage; exit 1;
  fi

  if [ -z "${cmd}" ]; then
    echo "command is empty\n"; usage; exit 1;
  fi

  for_each
}

run

Example:

~/src/some_project(some_branch)$ git-for-each some_branch "grunt dev:test"
starting: 36df9df75a9221ef87cf2ee4424567680b6be149
succeeded
starting: 11e95fb860a2a38e9dc7649e5e1ee39463801b54
failed
starting: 9a815f51623064b099ce74b24e77a6ead36a7655
failed