Diff maven module libs between two branches.

maven-lib-diff

#!/bin/sh

module=$1
branch_a=$2
branch_b=$3
lib_a="${module}_a.lib"
lib_b="${module}_b.lib"
info=$4

usage="usage: maven-lib-diff <maven module> <branch a> <branch b> [--info]"

if [ -z "$module" ]; then
    echo $usage
    echo
    echo "maven module is empty"
    exit 0
fi

if [ -z "$branch_a" ]; then
    echo $usage
    echo
    echo "branch a is empty"
    exit 0
fi

if [ -z "$branch_b" ]; then
    echo $usage
    echo
    echo "branch b is empty"
    exit 0
fi

is_quiet=""
if [ "$info" != "--info" ]; then
    is_quiet="--quiet"
fi

echo "=== diff module ==="
echo
echo $module
echo
echo "=== diff branches ==="
echo
echo "branch a: $branch_a"
echo "branch b: $branch_b"
echo

git checkout $is_quiet $branch_a && \
echo
mvn -DskipTests=true $is_quiet install && \
mvn dependency:resolve -pl $module | grep ":compile" | awk '{ print $2 }' | sort > $lib_a
echo

git checkout $is_quiet $branch_b && \
echo
mvn -DskipTests=true $is_quiet install && \
mvn dependency:resolve -pl $module | grep ":compile" | awk '{ print $2 }' | sort > $lib_b
echo

echo "=== diff result ==="
echo

diff -u $lib_a $lib_b | diff-so-fancy
rm -r $lib_a $lib_b