Cfrgtkky

Using the terminal, is it possible to clean and install the projects within a POM Project that have changes after a git merge/pull, in other words, changes since the last clean install?

EDIT

Thanks to VonC's answer, I have completed a script that does what I desired. See my answer bellow for details.

Since you can detect the list of pom.xml changes between two commits:

git diff --name-status <commit1> <commit2>

(see also "Detail change after Git pull")

, you can make a script which would, for each module, do a mvn clean install.

Thanks to VonC's answer, I have completed a script that does what I desired.

The project is a POM Project that contains sub-POM Projects that house the main projects for the application. I achieved the desired result by getting the current working branch to call git diff --name-status HEAD@{1} <current_branch>.

This got the list of the changed files within the project, which I then split into an array. Unfortunately I could not get the split to work well, so the array is organized as change type followed by file path.

Then I checked string size, skipping single character strings. The next step was to split the string into an array, delimited by /. Checked if it exists in an array if root paths, adding if it does not.

Lastly, loop over the root path array and do the maven calls.

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

#

# 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