intellij/localconfig/localconfig.go

// Copyright 2020 The Monogon Project Authors.
//
// SPDX-License-Identifier: Apache-2.0
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

// localconfig modifies the project's IntelliJ config to include project-specific
// settings. This is usually done by checking in the .idea directory, but we do not
// want to do this: it conflicts with the Bazel plugin's way of conducting its
// workspace business, lacks backwards compatibility, and is a common source of
// spurious Git diffs, especially when the IDE/JDK/random plugins are updated and
// team members run different versions.
//
// Instead, we use the officially supported way of shipping IntelliJ Bazel project
// configs - a .bazelproject file that can be imported using the Bazel project
// import wizard, with local configs. We then use this tool to mangle the local
// configs to add additional custom configuration beyond run configurations. This
// avoids merge conflicts and allows us to intelligently handle schema changes.
package main

import (
	"log"
	"os"
	"path"

	"source.monogon.dev/intellij/localconfig/watchers"
)

func main() {
	if len(os.Args) != 2 {
		log.Fatal("usage: localconfig <project dir>")
	}

	projectDir := os.Args[1]
	if _, err := os.Stat(path.Join(projectDir, ".ijwb")); err != nil {
		log.Fatalf("invalid project dir: %v", err)
	}

	if err := watchers.RewriteConfig(projectDir); err != nil {
		log.Fatal(err)
	}
}