Configurable CheckReturnValue

Configurable Lint and Error-Prone alternative checkers for @CheckReturnValue.

Integration

Lint

(For Gradle)

For Android Java/Kotlin projects, the lint should automatically be included just by using the lintChecks configuration For plain Java/Kotlin projects, you'll need to apply the com.android.lint plugin first

// Only if not an Android project
apply plugin: 'com.android.lint'

dependencies {
  lintChecks 'io.sweers.configurablecheckreturnvalue:lint:x.y.z'
}

By default, a common set of known CheckReturnValue-esque annotations will be used to match the standard Lint CheckReturn detector. To configure a custom set, you can define them with a :-delimited string of fully qualified class names or simple names via configurableCheckReturnValue.customAnnotations property in the root gradle.properties file. These override the default set.

If you want to use the standard set but just exclude some, you can define them as a :-delimited string of fully qualified class names via configurableCheckReturnValue.excludeAnnotations.

# gradle.properties
configurableCheckReturnValue.customAnnotations=my.custom.annotation.CheckReturn:another.annotation.CheckReturnTwo
configurableCheckReturnValue.excludeAnnotations=some.excluded.CheckReturnAnnotation

Error Prone

Gradle, using net.ltgt.errorprone plugin:

dependencies {
  errorprone 'io.sweers.configurablecheckreturnvalue:error-prone:x.y.z'
}

By default, a common set of known CheckReturnValue-esque annotations will be used to match the standard Error-Prone CheckReturnValue checker, as well as fuzzy matching on any annotation with simple name CheckReturnValue. To configure a custom set, you can define them with a :-delimited string of fully qualified class names or simple names via CustomAnnotations. These override the default set.

If you want to use the standard set but just exclude some, you can define them as a :-delimited string of fully qualified class names or simple names via ExcludeAnnotations.

For Java projects:

import net.ltgt.gradle.errorprone.CheckSeverity

def customAnnotations = [
    "my.custom.annotation.CheckReturn"
]
def excludeAnnotations = [
    "some.excluded.CheckReturnAnnotation"
]
tasks.withType(JavaCompile).configure {
  check("ConfigurableCheckReturnValue", CheckSeverity.ERROR)
  options.errorprone.option("ConfigurableCheckReturnValue:CustomAnnotations", customAnnotations.join(":"))
  options.errorprone.option("ConfigurableCheckReturnValue:ExcludeAnnotations", excludeAnnotations.join(":"))
}

For Android projects:

import net.ltgt.gradle.errorprone.CheckSeverity

def customAnnotations = [
  "my.custom.annotation.CheckReturn"
]
def excludeAnnotations = [
  "some.excluded.CheckReturnAnnotation"
]
// Use `libraryVariants` for com.android.library, `applicationVariants` for com.android.application
android.(libraryVariants|applicationVariants).all { variant ->
  variant.javaCompileProvider.configure {
    options.errorprone {
      check("ConfigurableCheckReturnValue", CheckSeverity.ERROR)
      options.errorprone.option("ConfigurableCheckReturnValue:CustomAnnotations", customAnnotations.join(":"))
      options.errorprone.option("ConfigurableCheckReturnValue:ExcludeAnnotations", excludeAnnotations.join(":"))
    }
  }
}

Snapshots of the development version are available in Sonatype's snapshots repository.

License

Copyright (C) 2018 Zac Sweers

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.