Execute a command for all commits in a git repository.

git-foreach.sh

#!/bin/bash

if ! [ -d ".git" ]; then
  echo "Script must be run from within a git repository"
  exit 1
fi

if [ $# -ne 1 ]; then
  echo "Please specify a script to execute for each commit"
  echo "Script will recieve <repo_dir> <commit ref> as arguments"
  echo "where repo_dir will already be checked out to the appropriate commit"
  exit 1
fi

SCRIPT=$1
TMP=$(mktemp -d -q)
REPO=$(pwd)

# clone the git repository
pushd $TMP > /dev/null 2>&1
git clone $REPO 2> /dev/null 1>&2
cd $(basename $REPO)

# get all
for F in $(git log --children | grep commit\   | sed "s;commit ;;" | tac | xargs echo); do
   git checkout $F 2> /dev/null 1>&2
   bash $SCRIPT $F
done

popd > /dev/null

rm -rf $TMP