git-find-fetch

#!/bin/bash

# usage: git-find-fetch [--mirror] [--repack] DIRS...
#
# by John Wiegley <johnw@newartisans.com>
#
# The purpose of this script is to walk recursively through a set of
# directories, fetching updates for any and all Git repositories found
# therein.
#
# The script is smart about using git-svn or gc-utils, if those are needed to
# get updates.  Further, it calls "git remote update" for each repository, to
# ensure all its remotes are also updated.
#
# Lastly, if you have a remote called "mirror" in any repository, all its refs
# will be "push --mirror"'d to that remote under the assumption that you want
# the mirror to receive all the updates you just fetch'd.
#
# Options:
#
#   --mirror   Only push to your mirrors, do not fetch.
#   --repack   Repack and prune repositories after updating them.

mirror_only=false
if [[ "$1" == --mirror ]]; then
    mirror_only=true
    shift 1
fi

repack=false
if [[ "$1" == --repack ]]; then
    repack=true
    shift 1
fi

find "$@" \( -name .git -o -name '*.git' \) -type d | \
    while read repo_dir
    do
	if [[ -f "$repo_dir"/config ]]
	then
	    if [[ $mirror_only == false ]]; then
		# If this is a git-svn repo, use git svn fetch
		if grep -q '^\[svn-remote ' "$repo_dir"/config
		then
		    echo git svn fetch: $repo_dir
		    GIT_DIR="$repo_dir" git svn fetch

		# If this is a gc-utils repo, use gc-utils update
		elif grep -q '^\[gc-utils\]' "$repo_dir"/config
		then
		    echo gc-utils update: $repo_dir
		    (cd "$repo_dir"; gc-utils update)

		fi

		GIT_DIR="$repo_dir" git remote update
	    fi

	    for remote in $(GIT_DIR="$repo_dir" git remote)
	    do
		if [[ $remote == mirror ]]; then
		    echo git push: $repo_dir -- $remote
		    GIT_DIR="$repo_dir" git push -f --mirror $remote
		fi
	    done

	    if [[ $repack == true ]]; then
		GIT_DIR="$repo_dir" git fsck --full && \
		    GIT_DIR="$repo_dir" git repack -a -d -f --window=200 --depth=50 && \
		    GIT_DIR="$repo_dir" git prune
	    fi
	fi
    done