303 lines
13 KiB
Markdown
303 lines
13 KiB
Markdown
# Semantic Version Annotation Processor
|
|
|
|
[](http://opensource.org/licenses/BSD-3-Clause) [](https://github.com/ethauvin/semver/releases/latest) [](https://maven-badges.herokuapp.com/maven-central/net.thauvin.erik/semver) [  ](https://bintray.com/ethauvin/maven/SemVer/_latestVersion)
|
|
[](https://snyk.io/test/github/ethauvin/semver?targetFile=build.gradle) [](https://sonarcloud.io/dashboard?id=ethauvin_semver) [](https://travis-ci.org/ethauvin/semver) [](https://ci.appveyor.com/project/ethauvin/semver) [](https://circleci.com/gh/ethauvin/semver/tree/master)
|
|
|
|
An [annotation processor](https://docs.oracle.com/javase/8/docs/api/javax/annotation/processing/Processor.html) that automatically generates a `GeneratedVersion` class based on a [Mustache](https://mustache.github.io/) template and containing the [semantic version](http://semver.org/) (major, minor, patch, etc.) that is read from a `Properties` file or defined in the [annotation](https://docs.oracle.com/javase/tutorial/java/annotations/basics.html).
|
|
|
|
This processor was inspired by Cédric Beust's [version-processor](https://github.com/cbeust/version-processor) and works well in conjunction with the [__Semantic Version Plugin for Gradle__](https://github.com/ethauvin/semver-gradle).
|
|
|
|
## Table of Contents
|
|
- [Examples](#examples)
|
|
- [Template](#template)
|
|
- [Default Template](#default-template)
|
|
- [Custom Template](#custom-template)
|
|
- [Elements & Properties](#elements--properties)
|
|
- [Usage with Maven, Gradle, Kotlin and Kobalt](#usage-with-maven-gradle-kotlin-and-kobalt)
|
|
- [Maven](#maven)
|
|
- [Gradle](#gradle)
|
|
- [Class Generation](#class-generation)
|
|
- [Class & Source Generation](#class--source-generation)
|
|
- [Java 12](#java-12)
|
|
- [Kotlin](#kotlin)
|
|
- [Kotlin & Gradle](#kotlin--gradle)
|
|
- [Kobalt](#kobalt)
|
|
- [Auto-Increment](#auto-increment)
|
|
|
|
## Examples
|
|
|
|
* Using annotation elements:
|
|
|
|
```java
|
|
import net.thauvin.erik.semver.Version;
|
|
|
|
@Version(major = 1, minor = 0, patch = 0, preRelease = "beta")
|
|
public class A {
|
|
// ...
|
|
```
|
|
|
|
* Or using a [properties](https://docs.oracle.com/javase/tutorial/essential/environment/properties.html) file:
|
|
|
|
```java
|
|
import net.thauvin.erik.semver.Version;
|
|
|
|
@Version(properties = "version.properties")
|
|
public class A {
|
|
// ...
|
|
```
|
|
|
|
```ini
|
|
# version.properties
|
|
version.major=1
|
|
version.minor=0
|
|
version.patch=0
|
|
version.prerelease=beta
|
|
```
|
|
|
|
[View Example](https://github.com/ethauvin/semver/tree/master/examples)
|
|
|
|
## Template
|
|
|
|
Upon running the annotation processor, a source file [`GeneratedVersion.java`](https://github.com/ethauvin/semver/blob/master/examples/java/src/generated/java/com/example/GeneratedVersion.java) is automatically generated with static methods to access the semantic version data. The source is based on a fully customizable [Mustache](https://mustache.github.io/) template.
|
|
|
|
To use your own template, simply create a `version.mustache` file in the project's root directory. The processor will automatically look for it.
|
|
|
|
To specify your own template name, use:
|
|
|
|
```java
|
|
@Version(template = "version.mustache")
|
|
public class A {
|
|
// ...
|
|
```
|
|
|
|
### Default Template
|
|
|
|
The [default template](https://github.com/ethauvin/semver/blob/master/src/main/resources/semver.mustache ) implements the following static variables:
|
|
|
|
Field | Description | Example
|
|
:------------------|:---------------------------------|:-----------------
|
|
`PROJECT` | The project name, if any. | `MyProject`
|
|
`BUILDDATE` | The build date. | [`java.util.Date`](https://docs.oracle.com/javase/8/docs/api/java/util/Date.html)
|
|
`VERSION` | The full version string. | `1.2.3-alpha+001`
|
|
`MAJOR` | The major version. | `1`
|
|
`MINOR` | The minor version. | `2`
|
|
`PATCH` | The patch version. | `3`
|
|
`PRERELEASE` | The pre-release version, if any. | `alpha`
|
|
`PRERELASE_PREFIX` | The pre-release prefix | `-`
|
|
`BUILDMETA` | The build metadata, if any. | `001`
|
|
`BUILDMETA_PREFIX` | The metadata prefix. | `+`
|
|
`SEPARATOR` | The version separator. | `.`
|
|
|
|
### Custom Template
|
|
|
|
A very simple custom template might look something like:
|
|
|
|
```java
|
|
/* version.mustache */
|
|
package {{packageName}};
|
|
|
|
import java.util.Date;
|
|
|
|
public final class {{className}} {
|
|
public final static String PROJECT = "{{project}}";
|
|
public final static Date DATE = new Date({{epoch}}L);
|
|
public final static String VERSION = "{{semver}}";
|
|
}
|
|
```
|
|
|
|
The mustache variables automatically filled in by the processor are:
|
|
|
|
Variable | Description | Type
|
|
:-----------------------------|:----------------------------|:--------
|
|
`{{packageName}}` | The package name. | `String`
|
|
`{{className}}` | The class name. | `String`
|
|
`{{project}}` | The project name. | `String`
|
|
`{{epoch}}` | The build epoch/unix time. | `long`
|
|
`{{major}}` | The major version. | `int`
|
|
`{{minor}}` | The minor version. | `int`
|
|
`{{patch}}` | The patch version. | `int`
|
|
`{{preRelease}}` | The pre-release version. | `String`
|
|
`{{preReleasePrefix}}` | The pre-release prefix. | `String`
|
|
`{{buildMeta}}` | The build metadata version. | `String`
|
|
`{{buildMetaPrefix}}` | The metadata prefix. | `String`
|
|
`{{separator}}` | The version separator. | `String`
|
|
`{{semver}}` or `{{version}}` | The full semantic version. | `String`
|
|
|
|
Please also look at this [example](https://github.com/ethauvin/mobibot/blob/master/version.mustache) using [`java.time`](https://docs.oracle.com/javase/8/docs/api/java/time/package-summary.html)
|
|
|
|
## Elements & Properties
|
|
|
|
The following annotation elements and properties are available:
|
|
|
|
Element | Property | Description | Default
|
|
:------------------|:----------------------------|:----------------------------------|:-------------------------
|
|
`project` | `version.project` | The project name. |
|
|
`major` | `version.major` | The major version number. | `1`
|
|
`minor` | `version.major` | The minor version number. | `0`
|
|
`patch` | `version.patch` | The patch version number. | `0`
|
|
`preRelease` | `version.prerelease` | The pre-release version. |
|
|
`preReleasePrefix` | `version.prerelease.prefix` | The pre-release prefix. | `-`
|
|
`buildMeta` | `version.buildmeta` | The build metadata version. |
|
|
`buildMetaPrefix` | `version.buildmeta.prefix` | The metadata prefix. | `+`
|
|
`separator` | `version.separator` | The version separator. | `.`
|
|
`packageName` | | The package name. | _Same as annotated class_
|
|
`className` | | The name of the generated class. | `GeneratedVersion`
|
|
`properties` | | The properties file. |
|
|
`template` | | The template file. | `version.mustache`
|
|
`type` | | Either `java` or `kt` for Kotlin. | `java`
|
|
`keysPrefix` | | The prefix for all property keys. | `version.`
|
|
|
|
In order to easily incorporate with existing projects, the property keys may be assigned custom values:
|
|
|
|
```java
|
|
@Version(
|
|
properties = "example.properties",
|
|
keysPrefix = "example."
|
|
majorKey = "maj",
|
|
minorKey = "min",
|
|
patchKey = "build",
|
|
preReleaseKey = "rel",
|
|
buildMetaKey = "meta",
|
|
projectKey = "project"
|
|
)
|
|
public class Example {
|
|
// ...
|
|
```
|
|
|
|
```ini
|
|
# example.properties
|
|
example.project=Example
|
|
example.maj=1
|
|
example.min=0
|
|
example.build=0
|
|
example.rel=beta
|
|
example.meta=
|
|
# ...
|
|
```
|
|
|
|
> :warning: `keysPrefix` is a new element staring in `1.1.0` and may break older versions when using custom property keys.
|
|
> :zap: A quick fix is to include `keysPrefix=""` in the annotation to remove the default `version.` prefix.
|
|
|
|
## Usage with Maven, Gradle, Kotlin and Kobalt
|
|
|
|
### Maven
|
|
|
|
To install and run from [Maven](https://maven.apache.org/), configure an artifact as follows:
|
|
|
|
```xml
|
|
<dependency>
|
|
<groupId>net.thauvin.erik</groupId>
|
|
<artifactId>semver</artifactId>
|
|
<version>1.2.0</version>
|
|
</dependency>
|
|
```
|
|
|
|
Please look at [pom.xml](https://github.com/ethauvin/semver/blob/master/examples/java/pom.xml) in the [Java example](https://github.com/ethauvin/semver/tree/master/examples/java) directory for a sample:
|
|
|
|
```bash
|
|
mvn verify
|
|
```
|
|
|
|
### Gradle
|
|
|
|
#### Class Generation
|
|
|
|
To install and run from [Gradle](https://gradle.org/), add the following to `build.gradle`:
|
|
|
|
```gradle
|
|
dependencies {
|
|
annotationProcessor 'net.thauvin.erik:semver:1.2.0'
|
|
implementation 'net.thauvin.erik:semver:1.2.0'
|
|
}
|
|
```
|
|
|
|
The `GeneratedVersion` class will be automatically created in the `build/generated` directory upon compiling.
|
|
|
|
#### Class & Source Generation
|
|
|
|
In order to also incorporate the generated source code into the `source tree`, add the following to the very top of `build.gradle`:
|
|
|
|
```gradle
|
|
compileJava.options.annotationProcessorGeneratedSourcesDirectory = file("${projectDir}/src/generated/java")
|
|
```
|
|
|
|
The `GeneratedVersion.java` file will now be located in `src/generated`.
|
|
|
|
|
|
#### Java 12
|
|
|
|
When using properties file (`version.properties`) under Java 12+ and Gradle 5.4.1+, the directory containing the properties file must be specified using the `semver.project.dir` processor argument.
|
|
|
|
For example, if the properties file is in the Gradle project directory:
|
|
|
|
```gradle
|
|
tasks.withType(JavaCompile) {
|
|
options.compilerArgs += [ "-Asemver.project.dir=$projectDir" ]
|
|
}
|
|
```
|
|
|
|
Please look at [build.gradle](https://github.com/ethauvin/semver/blob/master/examples/java/build.gradle) in the [Java example](https://github.com/ethauvin/semver/tree/master/examples/java) directory for a sample.
|
|
|
|
### Kotlin
|
|
|
|
The annotation processor also supports [Kotlin](https://kotlinlang.org/).
|
|
|
|
To generate a Kotlin version file, simply specify the `type` as follows:
|
|
|
|
```kotlin
|
|
import net.thauvin.erik.semver.Version
|
|
|
|
@Version(properties = "version.properties", type="kt")
|
|
open class Main {
|
|
// ...
|
|
```
|
|
The [Kotlin default template](https://github.com/ethauvin/semver/blob/master/src/main/resources/semver-kt.mustache) implements the same static fields and functions as the [Java template](#default-template).
|
|
|
|
#### Kotlin & Gradle
|
|
|
|
To install and run from [Gradle](https://gradle.org/), add the following to `build.gradle.kts`:
|
|
|
|
```kotlin
|
|
var semverProcessor = "net.thauvin.erik:semver:1.2.0"
|
|
|
|
dependencies {
|
|
kapt(semverProcessor)
|
|
implementation (semverProcessor)
|
|
}
|
|
|
|
kapt {
|
|
arguments {
|
|
arg("semver.project.dir", projectDir)
|
|
}
|
|
}
|
|
```
|
|
|
|
The arguments block is not required if `kapt` is configured to use the Gradle Worker API in `gradle.properties`:
|
|
|
|
```ini
|
|
kapt.use.worker.api=true
|
|
```
|
|
|
|
This option will likely be enabled by default in the future, but is currently not working under Java 10+ see [KT-26203](https://youtrack.jetbrains.net/issue/KT-26203).
|
|
|
|
Please look at the [Kotlin example](https://github.com/ethauvin/semver/tree/master/examples/kotlin) project for a [build.gradle.kts](https://github.com/ethauvin/semver/blob/master/examples/kotlin/build.gradle.kts) sample.
|
|
|
|
### Kobalt
|
|
|
|
To install and run from [Kobalt](https://beust.com/kobalt/), add the following to `Build.kt`:
|
|
|
|
```gradle
|
|
dependencies {
|
|
apt("net.thauvin.erik:semver:1.2.0")
|
|
compileOnly("net.thauvin.erik:semver:1.2.0")
|
|
}
|
|
```
|
|
|
|
Please look at [Build.kt](https://github.com/ethauvin/semver/blob/master/examples/java/kobalt/src/Build.kt) in the [Java example](https://github.com/ethauvin/semver/tree/master/examples/java) directory for a sample.
|
|
|
|
|
|
## Auto-Increment
|
|
|
|
Incrementing the version is best left to your favorite build system. For a solution using Gradle, please have a look at the [__Semver Version Plugin for Gradle__](https://github.com/ethauvin/semver-gradle).
|
|
|
|
There are also full [examples](https://github.com/ethauvin/semver-gradle/tree/master/examples/annotation-processor) in both [Java](https://github.com/ethauvin/semver-gradle/tree/master/examples/annotation-processor/java) and [Kotlin](https://github.com/ethauvin/semver-gradle/tree/master/examples/annotation-processor/kotlin) showing how to use both the plugin and annotation processor concurrently.
|