cvs.sourceforge-to-git

sf-cvs2git.sh

#!/usr/bin/env bash
#
# Convert a Sourceforge's CVS repo to Git.

# depends
type -p rsync >/dev/null || exit 3
type -p cvs2git >/dev/null || exit 3

# trap SIGINT
trap 'trap - INT; kill -s INT "$$"' INT

PROJ=$1         # project name
RSD=$1-cvs      # rsync destination
SRC=${RSD}      # cvs2git source (cvs repo)
MOD=${PROJ}     # cvs module
DST=$1-git      # cvs2git destination (git repo)

# cvs2git options file
OPTFILE=cvs2git.options
# set to empty value to use the following
# cvs2git options
TMP=/tmp/cvs2git-tmp
BLOB=git-blob.dat
DUMP=git-dump.dat
USER=cvs2git

backup-sf-cvs() {
    rsync -av rsync://${PROJ}.cvs.sourceforge.net/cvsroot/${PROJ}/\* ${RSD}
}

set-options() {
    local path_to_cvs_repo=$(readlink -f ${SRC}/${MOD})
    cp /usr/share/doc/cvs2svn/examples/cvs2git-example.options ${OPTFILE}
    sed -i "s~cvs2svn <admin@example.com>~${USER} <admin@example.com>~" ${OPTFILE}
    sed -i "s~cvs2svn-tmp~${TMP}~" ${OPTFILE}
    sed -i "s~cvs2svn-tmp/git-blob.dat~${TMP}/${BLOB}~" ${OPTFILE}
    sed -i "s~git-dump.dat~${DUMP}~" ${OPTFILE}
    sed -i "s~test-data/main-cvsrepos~${path_to_cvs_repo}~" ${OPTFILE}
    vi ${OPTFILE} # extra edits like author_transforms
}

cvs2git-wrap() {
    if [[ ! -z ${OPTFILE} ]]; then
        cvs2git --options=${OPTFILE}
    else
        cvs2git \
            --tmpdir=${TMP} \
            --blobfile=${TMP}/${BLOB} \
            --dumpfile=${TMP}/${DUMP} \
            --username=${USER} \
            ${SRC}
    fi
}

git-wrap() {
    cd ${DST}
    git init
    cat ${TMP}/${BLOB} ${TMP}/${DUMP} | git fast-import
    git checkout
    git gc --prune=now
    git repack -adf
}

usage() {
    echo "Usage: $(basename $0) [project name]"
    exit 1
}

main() {
    mkdir -p ${TMP} ${DST}
    backup-sf-cvs
    [[ ! -z ${OPTFILE} ]] && set-options
    cvs2git-wrap
    git-wrap
    rm -r ${TMP}
}

[[ -z "${PROJ}" ]] && usage || main