#!/usr/bin/env bash

# Exit immediately on any error.

set -euo pipefail

# Locate the script file. Cross symlinks if necessary.

loc="$0"

while [ -h "$loc" ]; do

ls=`ls -ld "$loc"`

link=`expr "$ls" : '.*-> \(.*\)$'`

if expr "$link" : '/.*' > /dev/null; then

loc="$link" # Absolute link

else

loc="`dirname "$loc"`/$link" # Relative link

fi

done

# Move to the location of the script

base_dir=`dirname "$loc"`

cd $base_dir

# Save the current branch name.

branch=`git rev-parse --abbrev-ref HEAD`

# Checkout master, update the suprepos and generate source files.

git checkout master

git submodule sync

git submodule update --init

./gradlew cleanGenerateBabelSources generateBabelSources

# Save these source files ia temp directory.

temp_dir="$(mktemp -d -t diff-generated-sources.XXXXXX)" # Weird usage, but works on Linux and Mac OS

function finish() {

[[ ! -e "$temp_dir" ]] || rm -r "$temp_dir"

}

trap finish EXIT

cp -r build/generated-sources/ $temp_dir

# Switch back to the original branch, update the suprepos and generate source files.

git checkout $branch

git submodule sync

git submodule update --init

./gradlew cleanGenerateBabelSources generateBabelSources

# Create the diff and open the page to submit to Phabricator.

# The diff command uses its return command to signal whether there was any

# difference, so we disable exiting on non-zero return codes for this command.

set +e

raw_diff=`diff -uNr ${temp_dir}/babel/ build/generated-sources/babel/`

diff_status=$?

set -e

if [ $diff_status -eq 1 ]; then

echo "$raw_diff" | grep -v "diff -uNr" | pbcopy

echo "Diff copied to the clipboard."

open "https://tails.corp.dropbox.com/differential/diff/create/"

elif [ $diff_status -eq 0 ]; then

>&2 echo "No difference found!"

else

exit $diff_status

fi