Re: git-archive and submodules

[CJ van den Berg <cj@vdbonline.com>]

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On Sat, Mar 29, 2008 at 09:52:02AM -0400, Shawn O. Pearce wrote:
> Whit Armstrong <armstrong.whit@gmail.com> wrote:
> > Is there a way to ask git-archive to archive the submodules of the
> > project as well?
> > 
> > I have a project that needs it's submoduels distributed with it.
> 
> No.
> 
> Patches welcome.  :-)
>  
> We've talked about supporting it, and wouldn't mind having the
> tool do it for exactly the reason you mention, but thus far a
> patch has not been written to implement that.

Here's a script I use at work that calls git-archive recursively for
submodules and builds a single tarball for everything. If there is
interest in having something like this in git proper I could put some
work into cleaning it up for general use. Perhaps something like this
should be integrated into git-archive directly. Comments and suggestions
are welcome.

-- 
CJ van den Berg

mailto:cj@vdbonline.com
  xmpp:cj@vdbonline.com

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#!/bin/bash

set -e

TMP_DIR=$(mktemp -t -d $(basename $0).$USER.XXXXX)
GITMODULES_FILE=${TMP_DIR}/gitmodules
THIS_TAR=${TMP_DIR}/this.tar
SUBMODULE_TAR=${TMP_DIR}/submodule.tar

function cleanup() {
        rm -rf $TMP_DIR
}

function die() {
        cleanup
                exit 1
}

trap die SIGINT
trap die SIGHUP
trap die SIGTERM
trap die SIGQUIT
trap die ERR
trap cleanup EXIT

function usage() {
    echo "Build an archive of a repository and all submodules." >&2
    echo "" >&2
    echo "usage: $(basename $0) [-r n] repo treeish [prefix]" >&2
    echo "  repo      Repository path or URL." >&2
    echo "  treeish   Version to archive." >&2
    echo "  -r n      Maximum recursion level. Default is 1." >&2
    echo "  -h        Show this message." >&2
    echo "" >&2
    exit 1
}

while [ "${1:0:1}" == "-" ]
do
    if [ "$1" == "-h" ] ; then
        usage
    fi
    if [ "$1" == "-r" ] ; then
        LEVEL=$2
        shift
        if [ -z "$LEVEL" ] ; then
            usage
        fi
        if [ ! $LEVEL -lt 0 ] ; then
            echo -n "" >&2
        else
            usage
        fi
    fi
    shift
done

if [ $# -lt 2 -o $# -gt 3 ] ; then
    usage
fi

export GIT_DIR=$1
REV="$2"
PREFIX="$3"
if [ -z "$LEVEL" ] ; then
    LEVEL=1
fi

if echo $GIT_DIR | grep -q ":"
then
    REMOTE_HOST=$(echo $GIT_DIR | cut -d ":" -f 1)
    REMOTE_PATH=$(echo $GIT_DIR | cut -d ":" -f 2)
    if [ "$REMOTE_HOST" == "$(hostname)" ] ; then
        export GIT_DIR=${REMOTE_PATH}
    else
        exec ssh -n $REMOTE_HOST $(basename $0) -r $LEVEL $REMOTE_PATH $REV $PREFIX
    fi
fi

if [ "${GIT_DIR:0:2}" == "~/" ] ; then
    export GIT_DIR=/home/${USER}/${GIT_DIR#\~/}
elif [ "${GIT_DIR:0:1}" == "~" ] ; then
    export GIT_DIR=/home/${GIT_DIR#\~}
fi

REV_NAME=$(git describe ${REV} 2> /dev/null || true)
if [ -z "$REV_NAME" ] ; then
    REV_NAME=$(git rev-parse ${REV})
fi

if [ -z "$PREFIX" ] ; then
    PREFIX=$REV_NAME
fi

echo >&2 ${PREFIX} from $(git-make-repo-url) \(${REV_NAME}\)
git archive --prefix=${PREFIX}/ $REV > $THIS_TAR

mkdir -p $TMP_DIR/$PREFIX
echo ${REV_NAME}> $TMP_DIR/$PREFIX/GITVERSION
echo $(git-make-repo-url)> $TMP_DIR/$PREFIX/GITSOURCE
(
    cd $TMP_DIR
    tar -rf $THIS_TAR $PREFIX
)

if [ $LEVEL -gt 0 ]
then
    if git show $REV:.gitmodules > $GITMODULES_FILE 2> /dev/null
    then
        LEVEL=$(($LEVEL - 1))
        git ls-tree -r "$REV" | grep '^160000 ' |
        while read mode type sha1 path
        do
            (
            submodule_name=$(git config --file $GITMODULES_FILE --list | \
                              grep "^submodule\..*\.path=$path" | cut -d . -f 2)
            if [ -z "$submodule_name" ] ; then
                echo >&2 -n "fatal: No submodule mapping found in .gitmodules "
                echo >&2    "for path '$path'"
                exit 1
            fi
            url=$(git config --file $GITMODULES_FILE \
                            submodule."$submodule_name".url || exit 1)
            $(basename $0) -r $LEVEL $url $sha1 $PREFIX/$path > $SUBMODULE_TAR || exit 1
            tar --concatenate --file=$THIS_TAR $SUBMODULE_TAR || exit 1
            ) < /dev/null
        done
    fi
fi
cat $THIS_TAR

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