Incremental Maven Build for Modules based Maven project

git-incr-build.sh

#!/bin/bash -e

# NB: the file is named git-incr-build.sh to let Gist colorize, but you should name it git-incr-build
# Put this script in your PATH and call it this way:
#   git incr-build clean install
# Can be combined with git pull --rebase and git push to make an "fast & safe push" script

function branchName {
	git rev-parse --symbolic-full-name --abbrev-ref $1
}

currentBranch=$(branchName HEAD)

function assertHasUpstream {
	local branchName=$1
	git rev-parse ${branchName}@{u} >/dev/null 2>/dev/null || (
		echo Current branch \'$branchName\' has no upstream configured.
		echo Set one with this:
		echo git branch --set-upstream $branchName '<reference/branch>'
		exit 1
	)
}

assertHasUpstream $currentBranch

function dt {
	local branch=$1
	git diff-tree $branch@{u}..$branch
}

function rootHasBeenTouched {
	# git diff-tree list files and directories modified by a commit range
	# directories have a type of 04000000 and files something like 100644 (last 3 nibbles are chmod)
	# so -v "040000" will discard directories and -c will count the rest
	dt $1 | grep -v ":040000 040000" -c
}

function modulesTouched {
	dt $1 | grep ":040000 040000" | cut -f2 | xargs | sed 's/ /,/g'
}

if [[ $(rootHasBeenTouched $currentBranch) -eq 0 ]]
then
	options="--pl $(modulesTouched $currentBranch) --also-make-dependents"
fi

mvn $options $*

git-safe-push.sh

#!/bin/bash -e

# NB: the file is named git-safe-push.sh to let Gist colorize, but you should name it git-safe-push
# Put this script in your PATH and call it this way:
#  git safe-push
# Don't forget to configure the branch to have a upstream branch

currentBranch=$(git rev-parse --symbolic-full-name --abbrev-ref HEAD)
git pull --rebase
git incr-build clean install
git push origin $currentBranch

git safe-push script to automatize push process