In a Scala/SBT project, figure out what dependencies are added or removed in a branch

sbt-deps-changes

#!/bin/bash

# Find dependency changes in a branch in a scala project using sbt.
# You have to have the https://github.com/jrudolph/sbt-dependency-graph plugin installed.

# the standard `sed` on Mac OS X won't work, so make sure to install GNU sed via brew.


branch="$1"


function is_git_clean() {
  [[ $(git status 2> /dev/null | tail -n1) =~ "nothing to commit" ]]
}

if ! is_git_clean; then
    echo "your git repo has changes. Commit them first";
    exit 1;
fi


git checkout master
sbt dependencyList > /tmp/deps-master

git checkout "$branch"  # your branch
sbt dependencyList > /tmp/deps-branch

# sbt outputs ANSI colors, always. Strip them away
gsed -r "s/\x1B\[([0-9]{1,2}(;[0-9]{1,2})?)?[mGK]//g" /tmp/deps-master > /tmp/deps-master-plain
gsed -r "s/\x1B\[([0-9]{1,2}(;[0-9]{1,2})?)?[mGK]//g" /tmp/deps-branch > /tmp/deps-branch-plain

# get just the package names
perl -wlne '/([\w-]+(\.[\w-]+)*:)+\d+(\.\d+)+/ and print $&' /tmp/deps-master-plain | sort | uniq > /tmp/deps-master-plain-uniq
perl -wlne '/([\w-]+(\.[\w-]+)*:)+\d+(\.\d+)+/ and print $&' /tmp/deps-branch-plain | sort | uniq > /tmp/deps-branch-plain-uniq

# and diff them
diff /tmp/deps-{master,branch}-plain-uniq