#!/usr/bin/env python3
# Copyright (c) 2016, the R8 project authors. Please see the AUTHORS file
# for details. All rights reserved. Use of this source code is governed by a
# BSD-style license that can be found in the LICENSE file.

# Wrapper script for running gradle.
# Will make sure we pulled down gradle before running, and will use the pulled
# down version to have a consistent developer experience.

import argparse
import os
import subprocess
import sys

import jdk
import utils

GRADLE8_SHA1 = os.path.join(utils.THIRD_PARTY, 'gradle.tar.gz.sha1')
GRADLE8_TGZ = os.path.join(utils.THIRD_PARTY, 'gradle.tar.gz')


def get_gradle():
    gradle_dir = os.path.join(utils.THIRD_PARTY, 'gradle')
    if utils.IsWindows():
        return os.path.join(gradle_dir, 'bin', 'gradle.bat')
    else:
        return os.path.join(gradle_dir, 'bin', 'gradle')


def ParseOptions():
    parser = argparse.ArgumentParser(description='Call gradle.')
    parser.add_argument('--exclude-deps',
                        '--exclude_deps',
                        help='Build without internalized dependencies.',
                        default=False,
                        action='store_true')
    parser.add_argument(
        '--no-internal',
        '--no_internal',
        help='Do not build with support for Google internal tests.',
        default=False,
        action='store_true')
    parser.add_argument('--java-home',
                        '--java_home',
                        help='Use a custom java version to run gradle.')
    parser.add_argument('--worktree',
                        help='Gradle is running in a worktree and may lock up '
                        'the gradle caches.',
                        action='store_true',
                        default=False)
    return parser.parse_known_args()


def GetJavaEnv(env):
    java_env = dict(env if env else os.environ, JAVA_HOME=jdk.GetJdkHome())
    java_env['PATH'] = java_env['PATH'] + os.pathsep + os.path.join(
        jdk.GetJdkHome(), 'bin')
    java_env['GRADLE_OPTS'] = '-Xmx1g'
    return java_env


def PrintCmd(s):
    if type(s) is list:
        s = ' '.join(s)
    print('Running: %s' % s)
    # I know this will hit os on windows eventually if we don't do this.
    sys.stdout.flush()


def EnsureGradle():
    utils.EnsureDepFromGoogleCloudStorage(get_gradle(), GRADLE8_TGZ,
                                          GRADLE8_SHA1, 'Gradle binary')


def EnsureJdk():
    # Gradle in the new setup will use the jdks in the evaluation - fetch
    # all beforehand.
    for root in jdk.GetAllJdkDirs():
        jdkTgz = root + '.tar.gz'
        jdkSha1 = jdkTgz + '.sha1'
        utils.EnsureDepFromGoogleCloudStorage(root, jdkTgz, jdkSha1, root)


def EnsureDeps():
    EnsureGradle()
    EnsureJdk()


def RunGradleIn(gradleCmd, args, cwd, throw_on_failure=True, env=None):
    EnsureDeps()
    cmd = [gradleCmd]
    args.extend(['--offline', '-c=d8_r8/settings.gradle.kts'])
    cmd.extend(args)
    utils.PrintCmd(cmd)
    with utils.ChangedWorkingDirectory(cwd):
        return_value = subprocess.call(cmd, env=GetJavaEnv(env))
        if throw_on_failure and return_value != 0:
            raise Exception('Failed to execute gradle')
        return return_value


def RunGradleWrapperIn(args, cwd, throw_on_failure=True, env=None):
    return RunGradleIn('./gradlew', args, cwd, throw_on_failure, env=env)


def RunGradle(args, throw_on_failure=True, env=None):
    return RunGradleIn(get_gradle(),
                       args,
                       utils.REPO_ROOT,
                       throw_on_failure,
                       env=env)


def RunGradleExcludeDeps(args, throw_on_failure=True, env=None):
    EnsureDeps()
    args.append('-Pexclude_deps')
    return RunGradle(args, throw_on_failure, env=env)


def RunGradleInGetOutput(gradleCmd, args, cwd, env=None):
    EnsureDeps()
    cmd = [gradleCmd]
    cmd.extend(args)
    utils.PrintCmd(cmd)
    with utils.ChangedWorkingDirectory(cwd):
        return subprocess.check_output(cmd, env=GetJavaEnv(env)).decode('utf-8')


def RunGradleWrapperInGetOutput(args, cwd, env=None):
    return RunGradleInGetOutput('./gradlew', args, cwd, env=env)


def RunGradleGetOutput(args, env=None):
    return RunGradleInGetOutput(get_gradle(), args, utils.REPO_ROOT, env=env)


def Main():
    (options, args) = ParseOptions()
    if options.java_home:
        args.append('-Dorg.gradle.java.home=' + options.java_home)
    if options.no_internal:
        args.append('-Pno_internal')
    if options.exclude_deps:
        args.append('-Pexclude_deps')
    if options.worktree:
        args.append('-g=' + os.path.join(utils.REPO_ROOT, ".gradle_user_home"))
    return RunGradle(args)


if __name__ == '__main__':
    sys.exit(Main())