Bash script for downloading directories from GIT repositories, without cloning the repository.

dl-git-dir

#!/usr/bin/env bash
#
# Bash script for downloading directories from GIT repositories, without cloning the repository.
# Requires the SVN client to be installed and available in PATH.
#
# Author: [email protected]
# Date: 05/06/2020

PROGRAM_NAME=$(basename $0)
URL="$1"
DEST_DIR="$2"

function usage {
    echo "usage: $PROGRAM_NAME <URL> [OUTPUT_DIR]"
    echo ""
    echo "downloads single directory from GIT repository"
    echo "requires svn client to be installed"
    exit 1
}

if [[ -z "$URL" ]]; then
    usage
fi

set -eu

# check if valid git url by checking for /tree/ in path
if [[ ! $URL =~ ^.*?\/tree\/.*?$ ]]; then
    echo "NOT VALID GIT URL"
fi

# check if url is on master branch
# if master rename /tree/master/ > /trunk/
# else rename /tree/$branch-name/ > /branches/$branch-name/
if [[ $URL =~ ^.*?\/tree\/master\/.*?$ ]]; then    
    SVN_URL=$(sed -E "s|\/tree\/master\/|\/trunk\/|g" <<< "$URL")
else
    SVN_URL=$(sed -E "s|\/tree\/(.*?)\/|\/branches\/\1\/|g" <<< "$URL")
fi

if [[ -z "$DEST_DIR" ]]; then
    svn checkout "$SVN_URL"
    DEST_DIR=$(dirname $SVN_URL)
else
    svn checkout "$SVN_URL" "$DEST_DIR"
fi

# rm .svn directory
rm -rf "$DEST_DIR/.svn"