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Diffstat (limited to 'exporters/darcs/git-darcs')
| -rwxr-xr-x | exporters/darcs/git-darcs | 264 |
1 files changed, 264 insertions, 0 deletions
diff --git a/exporters/darcs/git-darcs b/exporters/darcs/git-darcs new file mode 100755 index 0000000..eb70338 --- /dev/null +++ b/exporters/darcs/git-darcs @@ -0,0 +1,264 @@ +#!/bin/bash +# +# git-darcs - bidirectional operation between a darcs repo and git +# +# Copyright (c) 2008 by Miklos Vajna <vmiklos@frugalware.org> +# +# Based on git-bzr, which is +# +# Copyright (c) 2008 Pieter de Bie <pdebie@ai.rug.nl> +# +# This program is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 2 of the License, or +# (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program; if not, write to the Free Software +# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, +# USA. +# + +add() +{ + name="$1" + shift + location="$1" + shift + if ! [ -n "$name" -a -n "$location" ]; then + echo "Usage: git darcs add name location [darcs-fast-export options]" + exit + fi + if git remote show |grep -q $name; then + echo "There is already a remote with that name" + exit + fi + if [ -n "$(git config git-darcs.$name.location)" ]; then + echo "There is already a darcs repo with that name" + exit + fi + if [ ! -d $location/_darcs ]; then + echo "Remote is not a darcs repository" + exit + fi + git config git-darcs.$name.location $location + git config git-darcs.$name.darcs-fast-export-options "$*" + echo "Darcs repo $name added. You can fetch it with 'git darcs fetch $name'" + if ! [ -z "$*" ]; then + echo "darcs-fast-export will get options: $*" + fi +} + +get_location() +{ + l=$(git config git-darcs.$remote.location) + if [ -z "$l" ]; then + echo "Cannot find darcs remote with name '$remote'." >&2 + exit + fi + echo $l +} + +fetch() +{ + remote="$1" + shift + if ! [ -n "$remote" -a -z "$*" ]; then + echo "Usage: git darcs fetch reponame" + exit + fi + location=$(get_location $remote) + git_map=$git_dir/darcs-git/$remote-git-map + darcs_map=$git_dir/darcs-git/$remote-darcs-map + common_opts="--working $git_dir/darcs-git/repo --logfile $git_dir/darcs-git/fetch.log --git-branch=darcs/$remote" + dfe_opts=$(git config git-darcs.$remote.darcs-fast-export-options) + if [ ! -f $git_map -a ! -f $darcs_map ]; then + echo "There doesn't seem to be an existing refmap." + echo "Doing an initial import" + mkdir -p $git_dir/darcs-git + darcs-fast-export --export-marks=$darcs_map $common_opts $dfe_opts $location | \ + git fast-import --export-marks=$git_map + elif [ -f $git_map -a -f $darcs_map ]; then + echo "Updating remote $remote" + old_rev=$(git rev-parse darcs/$remote) + darcs-fast-export --import-marks=$darcs_map --export-marks=$darcs_map $common_opts $dfe_opts $location | \ + git fast-import --quiet --import-marks=$git_map --export-marks=$git_map + new_rev=$(git rev-parse darcs/$remote) + if [ "$old_rev" != "$new_rev" ]; then + echo "Fetched the following updates:" + git shortlog $old_rev..$new_rev + else + echo "Nothing fetched." + exit + fi + else + echo "One of the mapfiles is missing! Something went wrong!" + exit + fi +} + +pull() +{ + remote="$1" + shift + if ! [ -n "$remote" -a -z "$*" ]; then + echo "Usage: git darcs pull reponame" + exit + fi + fetch $remote + # see if we need to merge or rebase + branch=$(git symbolic-ref HEAD|sed 's|.*/||') + if [ "$(git config branch.$branch.rebase)" = "true" ]; then + git rebase darcs/$remote + else + git merge darcs/$remote + fi +} + +push() +{ + remote="$1" + shift + if ! [ -n "$remote" -a -z "$*" ]; then + echo "Usage: git darcs push reponame" + exit + fi + location=$(get_location $remote) + if [ -n "$(git rev-list --left-right HEAD...darcs/$remote | sed -n '/^>/ p')" ]; then + echo "HEAD is not a strict child of $remote, cannot push. Merge first" + exit + fi + if [ -z "$(git rev-list --left-right HEAD...darcs/$remote | sed -n '/^</ p')" ]; then + echo "Nothing to push. Commit something first" + exit + fi + git_map=$git_dir/darcs-git/$remote-git-map + darcs_map=$git_dir/darcs-git/$remote-darcs-map + if [ ! -f $git_map -o ! -f $darcs_map ]; then + echo "We do not have refmapping yet. Then how can I push?" + exit + fi + echo "Pushing the following updates:" + git shortlog darcs/$remote.. + git fast-export --import-marks=$git_map --export-marks=$git_map HEAD | \ + (cd $location; darcs-fast-import --import-marks=$darcs_map --export-marks=$darcs_map \ + --logfile $git_dir/darcs-git/push.log) + if [ $? == 0 ]; then + git update-ref darcs/$remote HEAD + fi +} + +# List the darcs remotes +list() +{ + if [ -z "$*" ] + then + git config -l | sed -n -e '/git-darcs\..*/ {s/git-darcs\.//; s/\.location=.*//p}' + exit + elif [ "$#" -eq 1 ] + then + case $1 in + -v|--verbose) + git config -l | sed -n -e '/git-darcs\..*/ {s/git-darcs\.//; s/\.location=/\t/p}' + exit + ;; + esac + fi + echo "Usage: git darcs list [-v|--verbose]" + exit 1 +} + +# Find the darcs commit(s) supporting a git SHA1 prefix +find_darcs() +{ + sha1="$1" + shift + if [ -z "$sha1" -o -n "$*" ] + then + echo "Usage: git darcs find-darcs <sha1-prefix>" + exit 1 + fi + for remote in $git_dir/darcs/* + do + remote=`basename $remote` + git_map=$git_dir/darcs-git/$remote-git-map + darcs_map=$git_dir/darcs-git/$remote-darcs-map + if [ ! -f $git_map -o ! -f $darcs_map ] + then + echo "Missing mappings for remote $remote" + exit 1 + fi + for row in `sed -n -e "/:.* $sha1.*/ s/[^ ]*/&/p" $git_map` + do + sed -n -e "/$row / {s/[^ ]*//; s/.*/$remote\t&/p}" $darcs_map + done + done +} + +# Find the git commit(s) supporting a darcs patch prefix +find_git() +{ + patch="$1" + shift + if [ -z "$patch" -o -n "$*" ] + then + echo "Usage: git darcs find-git <patch-prefix>" + exit 1 + fi + for remote in $git_dir/darcs/* + do + remote=`basename $remote` + git_map=$git_dir/darcs-git/$remote-git-map + darcs_map=$git_dir/darcs-git/$remote-darcs-map + if [ ! -f $git_map -o ! -f $darcs_map ] + then + echo "Missing mappings for remote $remote" + exit 1 + fi + for row in `sed -n -e "/:.* $patch.*/ s/[^ ]*/&/p" $darcs_map` + do + sed -n -e "/$row / {s/[^ ]* \(.*\)/$remote\t\1/p}" $git_map + done + done +} + +git rev-parse 2> /dev/null +if [ $? != 0 ]; then + echo "Must be inside a git repository to work" + exit +fi + +git_dir=$(git rev-parse --git-dir) +# make it absolute +cd $git_dir +git_dir=$(pwd) +cd - >/dev/null +command="$1" +shift + +case $command in + add|push|fetch|pull|list) + ;; + find-darcs) + command=find_darcs + ;; + find-git) + command=find_git + ;; + *) + echo "Usage: git darcs [COMMAND] [OPTIONS]" + echo "Commands: add, push, fetch, pull, list, find-darcs, find-git" + exit + ;; +esac + + +up=$(git rev-parse --show-cdup) +[ -z "$up" ] && up="." +cd $up +$command "$@" |