set -ev

BRANCH_NAME=$(git rev-parse --abbrev-ref HEAD)

if [ "${BRANCH_NAME}" = "master" ]; then

echo "Running for all packages"

pub global run flutter_plugin_tools "$@" $PLUGIN_SHARDING

# Make sure there is up-to-date master.

git fetch origin master

FLUTTER_CHANGED_GLOBAL=0

FLUTTER_CHANGED_PACKAGES=""

# Try get a merge base for the branch and calculate affected packages.

# We need this check because some CIs can do a single branch clones with a limited history of commits.

if BRANCH_BASE_SHA=$(git merge-base --fork-point FETCH_HEAD HEAD); then

echo "Checking changes from $BRANCH_BASE_SHA..."

FLUTTER_CHANGED_GLOBAL=`git diff --name-only $BRANCH_BASE_SHA HEAD | grep -v packages | wc -l`

FLUTTER_CHANGED_PACKAGES=`git diff --name-only $BRANCH_BASE_SHA HEAD | grep -o "packages/[^/]*" | sed -e "s/packages\///g" | sort | uniq | paste -s -d, -`

else

echo "Cannot find a merge base for the current branch to run an incremental build..."

echo "Please rebase your branch onto the latest master!"

fi

if [ "${FLUTTER_CHANGED_PACKAGES}" = "" ] || [ $FLUTTER_CHANGED_GLOBAL -gt 0 ]; then

echo "Running for all packages"

pub global run flutter_plugin_tools "$@" $PLUGIN_SHARDING

else

echo "Running only for $FLUTTER_CHANGED_PACKAGES"

pub global run flutter_plugin_tools "$@" --plugins=$FLUTTER_CHANGED_PACKAGES

fi