git-find-fetch

#!/usr/bin/env 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
        continue
    fi

    if [[ -f "$repo_dir"/../fetch.sh ]]; then
        (cd "$repo_dir"/..; sh fetch.sh)
        continue
    fi

    if [[ $mirror_only == false ]]; then
        # If this is a git-svn repo, use git svn fetch
        if grep -q '^\[svn-remote ' "$repo_dir"/config
        then
            if [[ -d "$repo_dir"/svn ]]; then
                echo git svn fetch: $repo_dir
                GIT_DIR="$repo_dir" git svn fetch
            fi

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

        fi

        echo $repo_dir
        GIT_DIR="$repo_dir" git remote update
    fi

    HG_DIR="$repo_dir"/../.git-hg
    FAST_EXPORT=$HOME/src/fast-export/hg-fast-export.sh
    if [[ -d "$HG_DIR" ]]; then
        (cd "$HG_DIR"; hg pull && hg update)
        (cd "$repo_dir"/..; PYTHON=python2.6 sh $FAST_EXPORT -r .git-hg)
    fi

    BZR_DIR="$repo_dir"/../.git-bzr
    if [[ -d "$BZR_DIR" ]]; then
        (cd "$BZR_DIR"; bzr pull)
        (cd "$repo_dir"/..; git bzr fetch upstream | cat)
    fi

    DARCS_DIR="$repo_dir"/../.git-darcs
    GIT_DARCS_IMPORT=$HOME/bin/git-darcs-import
    if [[ -d "$DARCS_DIR" && -f "$GIT_DARCS_IMPORT" ]]; then
        (cd "$DARCS_DIR"; darcs pull)
        (cd "$repo_dir"/..; $GIT_DARCS_IMPORT .git-darcs)
        (cd "$repo_dir"; git rebase git-darcs-import)
    fi

    if [[ $repack == true ]]; then
        GIT_DIR="$repo_dir" git flush
    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
done