#!/bin/bash

# Copyright 2013 The Flutter Authors. All rights reserved.

# Use of this source code is governed by a BSD-style license that can be

# found in the LICENSE file.

function error() {

echo "$@" 1>&2

}

function get_branch_base_sha() {

local branch_base_sha="$(git merge-base --fork-point FETCH_HEAD HEAD || git merge-base FETCH_HEAD HEAD)"

echo "$branch_base_sha"

}

function check_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.

local packages

local branch_base_sha="$(get_branch_base_sha)"

if [[ "$branch_base_sha" != "" ]]; then

echo "Checking for changed packages from $branch_base_sha"

IFS=$'\n' packages=( $(git diff --name-only "$branch_base_sha" HEAD | grep -o "packages/[^/]*" | sed -e "s/packages\///g" | sort | uniq) )

else

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

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

return 1

fi

CHANGED_PACKAGES=""

CHANGED_PACKAGE_LIST=()

# Filter out packages that have been deleted.

for package in "${packages[@]}"; do

if [ -d "$REPO_DIR/packages/$package" ]; then

CHANGED_PACKAGES="${CHANGED_PACKAGES},$package"

CHANGED_PACKAGE_LIST=("${CHANGED_PACKAGE_LIST[@]}" "$package")

fi

done

if [[ "${#CHANGED_PACKAGE_LIST[@]}" == 0 ]]; then

echo "No changes detected in packages."

else

echo "Detected changes in the following ${#CHANGED_PACKAGE_LIST[@]} package(s):"

for package in "${CHANGED_PACKAGE_LIST[@]}"; do

echo "$package"

done

echo ""

fi

return 0

}

# Runs the plugin tools from the plugin_tools git submodule.

function plugin_tools() {

(pushd "$REPO_DIR/script/tool" && dart pub get && popd) >/dev/null

dart run "$REPO_DIR/script/tool/lib/src/main.dart" "$@"

}