Run git grep for all repositories under the current directory

git-grep-all

#!/bin/sh
#
# Grep all git repos under the current directory.
#
# Usage: git-grep-all <exp>
#
# Examples:
#
#   git-grep-all Foo
#
#   git-grep-all -i foo
#
#   git-grep-all -l bar
#


# How long in days before refreshing the cached git repo list
CACHE_EXPIRY=10

# How deep to go when looking for git repos
DEPTH=10

# File to store a cache of git repos 
GIT_REPO_CACHE=.git-grep-all-repo-list


current_branch () {
  git rev-parse --abbrev-ref HEAD
}

msg () {
  BOLD_START='\033[1m'
  BOLD_END='\033[0m'
  if [ -t 1 ] ; then
      echo "${BOLD_START}[$*]${BOLD_END}"
  else 
      echo "[$*]"
  fi
}

if [ ! -f "${GIT_REPO_CACHE}" -o  "`find ${GIT_REPO_CACHE} -mtime +${CACHE_EXPIRY} -print 2>/dev/null`" = "${GIT_REPO_CACHE}" ] ; then
  msg "searching for git repos"
  find . -type d -name .git -exec dirname {} \; -depth ${DEPTH} > "${GIT_REPO_CACHE}"
  r=`cat ${GIT_REPO_CACHE} | wc -l | sed -e 's/ //g'`
  msg "found ${r} git repos; cached in ${GIT_REPO_CACHE}"
fi

TMP_GREP=/tmp/grep$$.txt

for i in `cat ${GIT_REPO_CACHE}` ; do 
    if [ -d "${i}" ] ; then 
	(cd $i; git grep "$@" > ${TMP_GREP})
	if [ -s ${TMP_GREP} ]; then
            branch=`cd $i; current_branch`
	    msg repository: $i, branch: $branch
	    cat ${TMP_GREP} | sed -e "s#^#$i/#"
	fi
	rm -f ${TMP_GREP}
    else 
        msg "cannot find directory ${i}; skipping and deleting repo cache"
	rm -f "${GIT_REPO_CACHE}"
    fi
done