Cron Job like git hook, to inform the Jenkins|Hudson ScriptTrigger Plugin to do a build. - by Samuel Maciel Sampaio

check_git_remote_changes.sh

#!/bin/bash#
#
# check_git_remote_changes.sh
# By: Samuel Maciel Sampaio <20140115>
# 
# Cron Job like git hook, to inform the Jenkins|Hudson
# ScriptTrigger Plugin to do a build.
# Plugin: https://wiki.jenkins-ci.org/display/JENKINS/ScriptTrigger+Plugin

GIT_REPO_FOLDER=$1
if [ -z "$GIT_REPO_FOLDER" ]; then
    echo "usage: $0 <GIT_REPO_FOLDER>";
    exit 1;
fi

fetch_output=$(
    git --git-dir "$GIT_REPO_FOLDER/.git" \
        --work-tree "$GIT_REPO_FOLDER" \
        fetch --dry-run 2>&1
    )

echo $fetch_output | grep "^From"
grep_exit_code=$?

if [ "$grep_exit_code" -eq "0" ]; then
    git --git-dir "$GIT_REPO_FOLDER/.git"\
        --work-tree "$GIT_REPO_FOLDER" \
        fetch

    git --git-dir "$GIT_REPO_FOLDER/.git"\
        --work-tree "$GIT_REPO_FOLDER" \
        fetch --tags

    exit 0
else
    exit 2
fi