gsclone

#!/bin/sh

if [ "$#" != 2 ] || [ "$1" == "--help" ]; then
	echo "  gsclone -- Create a subtree from a remote repository."
	echo "  Usage: gsclone [subdir] [address]" 
    echo "  Run this script from the root directory of the containing repo."
    echo "  [subdir] is a subdirectory to clone the subtree into."
    echo "  [address] is the URL of the repository to be cloned."
	echo "  e.g. gsclone mylib http://github.com/terriblememory/mylib.git"
    echo "  Note that [subdir] is used as the name for the subdirectory and the remote"
    echo "  origin for the subtree, so it has to be suitable for both uses. This means"
    echo "  that this script does not support nested subdirectories. So, for example"
    echo "  'mylib' is ok but 'libs/mylib' is not."
    echo "  Use gspull to get updates from the subtree's origin."
    echo "  Use gspush to update the subtree origin with your changes."
	exit 1
fi

SUBDIR=$1
ADDRESS=$2

if [ -d $SUBDIR ]; then
    echo "ERROR: '$SUBDIR' already exists."
    exit 1
fi

if !(git remote add $SUBDIR $ADDRESS); then
    echo "ERROR: 'git remote add' failed."
    exit 1
fi

if !(git subtree add --prefix=$SUBDIR --squash $SUBDIR master); then
    echo "ERROR: Unable to clone subtree."
    exit 1
fi

echo "Done."