#!/bin/bash

saveIFS="$IFS"
IFS=$'\n'
LINES=($(<~/.git_repos))
IFS="$saveIFS"

# Set defaults to user's homedir and no group (e.g., subdir)
WORKSPACE=$HOME
GRP=""
for LINE in "${LINES[@]}"; do
    if [ ${LINE:0:1} = '#' ] || [ -z $LINE ]; then
        # Comment or empty line encountered, skip
        continue
    fi

    if [ ${LINE:0:1} = 'workspace=' ]; then
        # TODO: strip 'workspace=' from LINE
        #WORKSPACE="$HOME/workspace/projects"
        WORKSPACE="$HOME/$LINE"

        if [ ! -e $WORKSPACE ]; then
            mkdir -p $WORKSPACE
        fi
    fi

    if [ ${LINE:0:1} = '[' ]; then
        echo 'group: $GRP'
        # TODO: strip [ and ] from LINE
        GRP=$LINE
    fi

    if [ ! -e $WORKSPACE/$GRP ]; then
        mkdir $WORKSPACE/$GRP
    elif [ -f $WORKSPACE/$GRP ]; then
        echo -e "[\e[31mX\e[0m] Group directory already exists as file: $WORKSPACE/$GRP"
        exit 1
    fi

    if [ -e ~/.git_group_$GRP ]; then
        saveIFS="$IFS"
        IFS=$'\n'
        REPOS=($(<~/.git_group_$GRP))
        IFS="$saveIFS"

        for REPO in "${REPOS[@]}"; do
            cd $WORKSPACE/$GRP
            REPODIR=$(basename "$REPO")
            #extension="${filename##*.}"
            REPODIR="${REPODIR%.*}"
            if [ -e $REPODIR ]; then
                cd $REPODIR
                if ! git diff --quiet; then
                    echo -e "[\e[31mX\e[0m] $GRP/$REPODIR changed - $WORKSPACE/$GRP/$REPODIR"
                else
                    echo -e "[\e[32mU\e[0m] $GRP/$REPODIR"
                    git pull --quiet
                    git push --quiet
                fi
            else
                echo -e "[\e[33mC\e[0m] $GRP/$REPODIR"
                git clone --quiet $REPO
            fi
        done
    else
        echo -e "[\e[31mX\e[0m] Group config file ~/.git_group_$GRP not found"
    fi
done