#!/bin/sh
#
# Take first subdir (or a subdir specified in a file) and consider
# it a git repo dir.  Get its origin, exchange the last bit for
# other project name and clone the other repo
#
# This is useful if you have a local dir where you store repos
# for various projects from a common namespace that differ only
# in last part of the remote URI.  Now all you need to do to
# clone new one is "git sibling aproject".  The script will
# do the rest for you including sniffing the URI.
#
# The script simply takes the first subdir.  In case this is not
# OK for you (e.g. the dir id likely to be empty or contain
# come "non-compliant" repos, you can specify path to the
# other "template" repo in .gittum-sibling file.
#
# Hint: regarding the "template" repo, you can easily create
# a "fake" repo that would sit elsewhere, e.g.:
#     $ mkdir .some/hidden/dir
#     $ cd .some/hidden/dir
#     $ git init
#     $ git remote add origin ssh://our_server/projects/FAKE


## cfgz
#

origin_name="origin"
sibling_conf=".gittum-sibling"


## funz
#

rewrite_uri_to () {
    # create a new remote URI based on current one
    git remote -v \
        | grep "^$origin_name" \
        | grep "(fetch)$" \
        | cut -f 2 \
        | cut -d" " -f 1 \
        | perl -pe "s|[^/]+$|$1|;"
}


## initz
#

project=$1

if [ -f $sibling_conf ];
then
    sibling=$(cat $sibling_conf);
else
    sibling=$(find -maxdepth 1 -type d -name "[^.]*" | sort | head -1)
fi

if [ -z "$sibling" ];
then
    echo "could not find older sibling" 1>&2
    exit 1
fi


## body
#

pushd "$sibling" >/dev/null
new_remote=$(rewrite_uri_to $project)
popd >/dev/null

echo \'git clone $new_remote\'
git clone $new_remote