Krdytkyu

I had searched for a solution to mvn clean install on my changed projects after a git pull. I even asked a question over at SO about the same thing. The answer I got pointed me into creating my own script to achieve what I wanted to accomplish. So I went, I saw, and I conquered the script that I wanted. However, it is probably not efficient, and could use refactoring. I am new to bash scripting and learned a bit while doing this.

The structure I was targeting is a Maven POM Project. That project contains several sub-POM Projects, which in turn contain Maven Java Projects.

Example Structure:

-Parent

|-Sub_Parent_A

 |-Child_1

 |-Child_2

|-Sub_Parent_B

 |-Child_3

 |-Child_4

I wanted to only call mvn clean install if a project had files that changed in the child projects. This would reduce time on going to each project by hand and calling the command or by just calling the command on the parent project.

The code can also be found on GitHub

################################################################################

#

# License:.....GNU General Public License v3.0

# Author:......CodeMonkey

# Date:........14 November 2018

# Title:.......GitMavenCleanInstall.sh

# Description: This script is designed to cd to a set Maven POM Project,

#   perform a git remote update and pull, and clean install the changed

#   files projects.

# Notice:......The project structure this script was originally set to target

#   is structured as a Maven POM Project that contains several sub-POM Projects.

#   The sub-POM Projects contain Maven Java Application projects. The targets

#   should be easy to change, and allow for others to target other structures.

#

################################################################################

#

# Change History: N/A

#

################################################################################



#!/bin/bash

#Function to check if array has element

containsElement () {

    local e match="$1"

    shift

    for e; do [[ "$e" == "$match" ]] && return 0; done

    return 1

}



#Navigate to the POM Project

cd PATH/TO/POM/PROJECT

#Remote update

git remote update -p

#Pull

git pull



#Get the current working branch

CURRENT_BRANCH="$(git branch | sed -n -e 's/^* (.*)/1/p')"

#Get the output of the command git diff

GIT_DIFF_OUTPUT="$(git diff --name-status HEAD@{1} ${CURRENT_BRANCH})"



#Split the diff output into an array

read -a GIT_DIFF_OUTPUT_ARY <<< $GIT_DIF_OUTPUT

#Declare empty array for root path

declare -a GIT_DIFF_OUTPUT_ARY_ROOT_PATH=()

FORWARD='/'

#Loop diff output array

for i in "$GIT_DIFF_OUTPUT_ARY[@]}"

do

    #Check that the string is not 1 Character

    if [[ "$(echo -n $1 | wc -m)" != 1 ]]

    then

        #Split the file path by /

        IFS='/' read -ra SPLIT <<< $i

        #Concatenate first path + / + second path

        path=${SPLIT[0]}$FORWARD${SPLIT[1]}

        #Call function to see if it already exists in the root path array

        containsElement "$path" "${GIT_DIFF_OUTPUT_ARY_ROOT_PATH[@]}"

        if [[ $? != 0 ]]

        then

            #Add the path since it was not found

            GIT_DIFF_OUTPUT_ARY_ROOT_PATH+=($path)

        fi

    fi

done



#Loop root path array

for val in ${GIT_DIFF_OUTPUT_ARY_ROOT_PATH[@]}

do

    #CD into root path

    cd $val

    #Maven call to clean install

    mvn -DskipTests=true --errors -T 8 -e clean install

    #CD back up before next project

    cd ../../

done