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#!/bin/sh # # USAGE # # bzr2git SOURCE [DEST] # # SUMMARY # # Converts bzr branch at SOURCE to git repo at DEST. # # DEST will be created and must not exist prior to calling. # If no DEST is provided, assume basename of SOURCE. # # SYNOPSIS # # Convert local bzr branch at ~/bzr/some-project to new git repo # at ~/git/some-project: # # $ mkdir ~/git # $ cd ~/git # $ bzr2git ~/bzr/some-project # # You can also specify the name of the new git directory: # # $ mkdir ~/git # $ bzr2git ~/bzr/some-project ~/git/some-project # # NOTES # # I whipped this together in about 15 minutes so don't get your hopes # up. It should work fine for most simple cases but there's a variety # of issues that make it suboptimal: it's slow, doesn't track renames # properly, and won't bring in branches or tags properly. It works well # enough for bringing history on a single master branch, though. # # You will need recent version of bzr and git as well as rsync. # # Copyright (c) 2008, Ryan Tomayko <rtomayko@gmail.com> # # Please let me know if you make improvements to this script. # bail on errors set -e # we need somewhere to do work... WORK_DIR="/tmp/bzr2git-$$" L="/tmp/bzr-log-$$" # remove work stuff on exit trap "rm -rf $WORK_DIR $L" 0 # exit with usage message bail() { echo "usage: $0 SOURCE [DEST]" exit 1 } # grab source and dest arguments SOURCE="$1" DEST="$2" # bail if no source given if [ -z "$SOURCE" ] ; then echo >&2 "must specify source bzr repository and dest git tree" bail fi # default DEST to basename of source [ -z "$DEST" ] && DEST=`basename $SOURCE` # bail if DEST already exists if [ -d "$DEST" ] ; then echo >&2 "$DEST already exists" exit 1 fi ORIG_DIR=`pwd` # create our work directory mkdir -p $WORK_DIR # initialize empty git repo mkdir $WORK_DIR/git cd $WORK_DIR/git git init >/dev/null # grab bzr branch at changeset 1 rev=1 cd $WORK_DIR bzr branch -r$rev "$SOURCE" bzr >/dev/null 2>&1 # figure out how many changesets we have in our bzr branch last_rev=`bzr version-info --custom --template='{revno}' $SOURCE` # loop over each changeset number while true do echo "===> Importing changeset $rev of $last_rev..." # grab meta data cd $WORK_DIR/bzr bzr log -r $rev > $L AUTHOR=`cat $L | grep ^committer: | cut -c12-` DATE=`cat $L | grep ^timestamp: | cut -c12-` # update git work dir rsync -ar --delete --exclude=.bzr/ --exclude=.git/ $WORK_DIR/bzr/ $WORK_DIR/git/ # perform commit GIT_AUTHOR_DATE="$DATE" GIT_COMMITTER_DATE="$DATE" export GIT_AUTHOR_DATE GIT_COMMITTER_DATE cd $WORK_DIR/git git add . [ "$AUTHOR" = "rtomayko" ] && AUTHOR="Ryan Tomayko <rtomayko@gmail>" echo $AUTHOR cat $L | tail -n +7 cat $L | tail -n +7 | cut -c3- | git commit -q -a --author "$AUTHOR" -F - || true # grab next rev rev=`echo $rev + 1 | bc` [ $rev -gt $last_rev ] && break cd $WORK_DIR/bzr bzr pull -r $rev --overwrite >/dev/null 2>&1 done cd "$ORIG_DIR" mv "$WORK_DIR/git" "$DEST" cd $DEST git gc --prune --aggressive echo "New git repo ready in $DEST"

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