find_git_repo

#!/bin/bash

find_git_repo(){
    # Parameters
    ITER=0

    # Functions
    helpFunction(){
        echo ""
        echo "Usage: find_git_repo <path>"
        echo ""
        echo -e "  -h/--help   \tHelp"
        echo -e "  <path>      \tGive the path as base dir to start searching,"
        echo -e "              \tabsolute or relative paths are both ok."
        exit 1
    }

    findGitRepo(){
        local SEARCH_BASE=$1
        for sub in $(ls ${SEARCH_BASE}); do
            if (test -d ${SEARCH_BASE}/${sub}) ; then
                SUCCESSOR_DIR=$( cd ${SEARCH_BASE}/${sub} && pwd)
                if (isGitRepo ${SUCCESSOR_DIR}); then
                    echo "${SUCCESSOR_DIR} is a git repository."
                    GIT_REPO_DIR[ITER]=${SUCCESSOR_DIR}
                    ITER=$[ ${ITER} + 1 ] # ITER=${ITER}+1 is also Okay.
                else
                    # echo "${SUCCESSOR_DIR} is a normal folder."
                    findGitRepo ${SUCCESSOR_DIR}
                fi
            fi
        done
    }

    isGitRepo(){
        CANDIDATE_DIR=$1
        if [ $(ls -al ${CANDIDATE_DIR} | grep "^d" | grep -w ".git" | wc -l) -eq 1 ]; then
            return 0 # true
        else
            return 1 # false
        fi
    }

    main(){
        if [ $# -eq 0 ] || [ $# -gt 1 ] || [ $1 = "-h" ] || [ $1 = "--help" ] ; then
            helpFunction
        else
            BASE_DIR=$(cd $1 && pwd)
            echo -e "\033[36mcurrent dir is: ${BASE_DIR} \033[0m"
            findGitRepo ${BASE_DIR}
            export GIT_REPO_DIR
            echo "Found Git repositories: ${#GIT_REPO_DIR[*]}"
        fi
    }

    # Entry
    main $@
}

find_git_repo $@