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11 KiB
Markdown
256 lines
No EOL
11 KiB
Markdown
# Semantic Version Annotation Processor
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[](http://opensource.org/licenses/BSD-3-Clause) [](https://www.versioneye.com/user/projects/56a680101b78fd00390001d2) [](https://travis-ci.org/ethauvin/semver) [](https://ci.appveyor.com/project/ethauvin/semver) [](https://maven-badges.herokuapp.com/maven-central/net.thauvin.erik/semver) [  ](https://bintray.com/ethauvin/maven/SemVer/_latestVersion)
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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).
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This processor was inspired by Cédric Beust's [version-processor](https://github.com/cbeust/version-processor).
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## Examples
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* Using annotation elements:
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```java
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import net.thauvin.erik.semver.Version;
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@Version(major = 1, minor = 0, patch = 0, preRelease = "beta")
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public class A {
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// ...
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```
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* Or using a [properties](https://docs.oracle.com/javase/tutorial/essential/environment/properties.html) file:
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```java
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import net.thauvin.erik.semver.Version;
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@Version(properties = "version.properties")
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public class A {
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// ...
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```
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```ini
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# version.properties
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version.major=1
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version.minor=0
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version.patch=0
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version.prerelease=beta
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```
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[View Example](https://github.com/ethauvin/semver/tree/master/example)
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## Template
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Upon running the annotation processor, a source file [`GeneratedVersion.java`](https://github.com/ethauvin/semver/blob/master/example/src/generated/java/net/thauvin/erik/semver/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.
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To use your own template, simply create a `version.mustache` file. The processor will automatically look for it.
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To specify your own template name, use:
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```java
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@Version(template = "version.mustache")
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public class A {
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// ...
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```
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### Default Template
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The [default template](https://github.com/ethauvin/semver/blob/master/src/main/resources/semver.mustache) implements the following static fields:
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Field | Description | Example
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:--------------|:---------------------------------|:-----------------
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`PROJECT` | The project name, if any. | `MyProject`
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`BUILDDATE` | The build date. | [`java.util.Date`](https://docs.oracle.com/javase/8/docs/api/java/util/Date.html)
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`VERSION` | The full version string. | `1.0.0-alpha+001`
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`MAJOR` | The major version. | `1`
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`MINOR` | The minor version. | `0`
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`PATCH` | The patch version. | `0`
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`PRERELEASE` | The pre-release version, if any. | `alpha`
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`BUILDMETA` | The build metadata, if any. | `001`
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And the following methods/functions:
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Method | Description | Example
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:------------------------|:----------------------------------------------------------|:--------
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`preReleaseWithPrefix()` | Returns the pre-release with a prefix, `-` by default. | `-alpha`
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`buildMetaWithPrefix()` | Returns the build metadata with a prefix, `+` by default. | `+001`
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### Custom Template
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A very simple custom template might look something like:
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```java
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/* version.mustache */
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package {{packageName}}
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import java.util.Date;
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public final class {{className}} {
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public final static String PROJECT = "{{project}}";
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public final static Date DATE = new Date({{epoch}}L);
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public final static int MAJOR = {{major}};
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public final static int MINOR = {{minor}};
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public final static int PATCH = {{patch}};
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public final static String PRERELEASE = "{{preRelease}}";
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public final static String BUILDMETA = "{{buildMeta}}";
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}
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```
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The mustache variables automatically filled in by the processor are:
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Variable | Description | Type
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:-----------------|:----------------------------|:--------
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`{{packageName}}` | The package name. | `String`
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`{{className}}` | The class name. | `String`
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`{{project}}` | The project name. | `String`
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`{{epoch}}` | The build epoch/unix time. | `long`
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`{{major}}` | The major version. | `int`
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`{{minor}}` | The minor version. | `int`
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`{{patch}}` | The patch version. | `int`
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`{{preRelease}}` | The pre/release version. | `String`
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`{{buildMeta}}` | The build metadata version. | `String`
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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)
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## Elements & Properties
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The following annotation elements and properties are available:
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Element | Property | Description | Default
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:-------------|:---------------------|:----------------------------------|:-------------------------
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`project` | `version.project` | The project name. |
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`major` | `version.major` | The major version number. | `1`
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`minor` | `version.major` | The minor version number. | `0`
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`patch` | `version.patch` | The patch version number. | `0`
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`preRelease` | `version.prerelease` | The pre-release version. |
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`buildMeta` | `version.buildmeta` | The build metadata version. |
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`packageName` | | The package name. | _Same as annotated class_
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`className` | | The name of the generated class. | `GeneratedVersion`
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`properties` | | The properties file. |
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`template` | | The template file. | `version.mustache`
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`type` | | Either `java` or `kt` for Kotlin. | `java`
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In order to easily incorporate with existing projects, the property keys may be assigned custom values:
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```java
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@Version(
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properties = "example.properties",
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majorKey = "example.major",
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minorKey = "example.minor",
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patchKey = "example.patch",
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preReleaseKey = "example.prerelease",
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buildMetaKey = "example.buildmeta",
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projectKey = "example.project"
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)
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public class Example {
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// ...
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```
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```ini
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# example.properties
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example.project=Example
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example.major=1
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example.minor=0
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example.patch=0
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# ...
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```
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## Usage with Maven, Grail, Kobalt and Kotlin
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### Maven
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To install and run from [Maven](http://maven.apache.org/), configure an artifact as follows:
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```xml
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<dependency>
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<groupId>net.thauvin.erik</groupId>
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<artifactId>semver</artifactId>
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<version>1.0</version>
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</dependency>
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```
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### Gradle
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#### Class Generation
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To install and run from [Gradle](https://gradle.org/), add the following to the `build.gradle` file:
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```gradle
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dependencies {
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compileOnly 'net.thauvin.erik:semver:1.0.0'
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}
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```
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The `GeneratedVersion` class will be automatically created in the `build/generated` directory upon compiling.
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#### Class & Source Generation
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In order to also incorporate the generated source code into the `source tree`, use the [EWERK Annotation Processor Plugin](https://github.com/ewerk/gradle-plugins/tree/master/annotation-processor-plugin). Start by adding the following to the very top of the `build.gradle` file:
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```gradle
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plugins {
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id "com.ewerk.gradle.plugins.annotation-processor" version "1.0.4"
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}
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```
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Then add the following to the `build.gradle` file:
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```gradle
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dependencies {
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compileOnly 'net.thauvin.erik:semver:1.0.0'
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}
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annotationProcessor {
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library 'net.thauvin.erik:semver:1.0.0'
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processor 'net.thauvin.erik.semver.VersionProcessor'
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// sourcesDir 'src/generated/java'
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}
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compileJava {
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// Disable the classpath processor
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options.compilerArgs << '-proc:none'
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}
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```
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The plugin implements a separate compile task that only runs the annotation processor and is executed during the build phase.
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Please look at the [build.gradle](https://github.com/ethauvin/semver/blob/master/example/build.gradle) file in the [example](https://github.com/ethauvin/semver/tree/master/example) module directory for a sample.
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### Kobalt
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To install and run from [Kobalt](http://beust.com/kobalt/), add the following to the `Build.kt` file:
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```gradle
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dependencies {
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apt("net.thauvin.erik:semver:1.0.0")
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compileOnly("net.thauvin.erik:semver:1.0.0")
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}
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```
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Please look at the [Build.kt](https://github.com/ethauvin/semver/blob/master/example/kobalt/src/Build.kt) file in the [example](https://github.com/ethauvin/semver/tree/master/example) module directory for a sample.
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### Kotlin
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The annotation processor also supports [Kotlin](https://kotlinlang.org/).
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To generate a Kotlin version file, simply specify the `type` as follows:
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```kotlin
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import net.thauvin.erik.semver.Version
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@Version(properties = "version.properties", type="kt")
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open class Main {
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// ...
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```
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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).
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Please look at the [Example for Kotlin](https://github.com/ethauvin/semver-example-kotlin) project for samples on using Gradle ([build.gradle](https://github.com/ethauvin/semver-example-kotlin/blob/master/build.gradle)) and Kobalt ([Build.kt](https://github.com/ethauvin/semver-example-kotlin/blob/master/kobalt/src/Build.kt)).
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### Auto-Increment
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Incrementing the version is best left to your favorite build system.
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For a solution using [Gradle](https://gradle.org/), please have a look at the [build.gradle](https://github.com/ethauvin/semver/blob/master/example/build.gradle) file in the [example](https://github.com/ethauvin/semver/tree/master/example) module directory. To run the example with patch version auto-incrementing, issue the following command:
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```
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gradle release run
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```
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For a solution using [Kobalt](http://beust.com/kobalt/) look at my [Property File Editor](https://github.com/ethauvin/kobalt-property-file) plug-in. |