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slack-lints

This repository contains a collection of custom Android/Kotlin lint checks we use in our Android and Kotlin code bases at Slack.

While we do publish artifacts to Maven Central, some of the lints checks may only really be relevant to Slack's codebase. We develop these in the open to knowledge-share with the community.

Installation

Add the dependency to the lintChecks configuration. Note for non-android projects, you must apply the com.android.lint Gradle plugin to use this.

Maven Central

dependencies {
  lintChecks("com.slack.lint:slack-lint-checks:<version>")
}

Overview

Do Not Mock

The slack.lint.mocking package contains several detectors and utilities for detecting mocking of types that should not be mocked. This is similar to ErrorProne's DoNotMockChecker and acts as an enforcement layer to APIs and classes annotated with @DoNotMock. This also detects common types that should never be mocked, such as Kotlin data classes or AutoValue classes.

Inclusivity

In order to write more inclusive code, we have an InclusiveNamingChecker tool to check for a configurable list of non-inclusive names.

Moshi

MoshiUsageDetector contains a wealth of checks for common programmer errors when writing classes for use with Moshi and MoshiX.

Misc

  • JavaOnlyDetector - detects use of Java-only APIs from Kotlin. Based on the original unreleased implementation in uber/lint-checks.
  • DaggerKotlinIssuesDetector - detects some known issues when using Dagger in Kotlin code.
  • RetrofitUsageDetector - detects some common issues when using Retrofit.
  • DenyListedApi – detects use of APIs that just shouldn't be used.
  • MustUseNamedParams – can be used on functions that should always use named parameters. Useful for APIs that have a lot of parameters and/or may change their order and you want to keep changes source-compatible.
  • ...and a plethora of others!

License

Copyright 2021 Slack Technologies, LLC

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.