git-changelog-gradle-plugin

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git-changelog-gradle-plugin

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Automate changelog and versioning with conventional commits and Git.

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# Git Changelog Gradle Plugin

This is a Gradle plugin for [Git Changelog Lib](https://github.com/tomasbjerre/git-changelog-lib).

Published to [plugins.gradle.org](https://plugins.gradle.org/plugin/se.bjurr.gitchangelog.git-changelog-gradle-plugin).

| Version                  | Java Version |
| ------------------------ | ------------ |
| version < 2.0.0          | 8            |
| 2.0.0 <= version < 2.2.0 | 11           |
| 2.2.0 <= version         | 17           |

## Usage

There is a complete running example [here](/git-changelog-gradle-plugin-example) and also with Kotlin DSL [here](/git-changelog-gradle-plugin-example-kotlin).

There are some more examples in the [build.gradle](https://github.com/tomasbjerre/git-changelog-gradle-plugin/blob/master/git-changelog-gradle-plugin-example/build.gradle).

More documentation can be found in the [Git Changelog Lib](https://github.com/tomasbjerre/git-changelog-lib).

It will use `HEAD` branch by default, you can change that with something like `toRevision = "main"`.

### Default tasks

These tasks are configured when plugin is applied, no further configuration needed to use them.

- `gitChangelogSemanticVersion` - Will set version in `gradle.properties` from [conventional commits](https://www.conventionalcommits.org/en/v1.0.0/).
- `gitChangelog` - Will update `CHANGELOG.md` using [conventional commits](https://www.conventionalcommits.org/en/v1.0.0/).

You can also set the property `setVersionConventional=true` that will trigger the `project.version` to be updated. The `gitChangelogSemanticVersion` will update the version to late if you are also publishing in the same invocation. Triggering the versioning with the property will set the version earlier so that it is correct in the publications. The properties that can be set are:

```properties
# Needs to be set
setVersionConventional=true

# These can also be set, but they have defaults
suffixSnapshot=...
suffixSnapshotIfNotTagged=...
majorVersionPattern=...
minorVersionPattern=...
patchVersionPattern=...
ignoreTagsIfNameMatches=...
```

### `build.gradle`

```groovy
plugin {
  id 'se.bjurr.gitchangelog.git-changelog-gradle-plugin' version 'X'
}

// Optional config if you want to configure the changelog
task gitChangelogTask(type: se.bjurr.gitchangelog.plugin.gradle.GitChangelogTask) {
 templateContent.set("""
  // Template here!
 """);
}

// Optional config if you want to configure versioning
task gitChangelogVersionTask(type: se.bjurr.gitchangelog.plugin.gradle.GitChangelogSemanticVersionTask) {
 suffixSnapshot.set(true);
 majorVersionPattern.set("^[Bb]reaking")
 minorVersionPattern.set("[Ff]eature")
 patchVersionPattern.set("[Ff]ix")
}
```

### Template - Simple

```hbs
Changelog of ${projectDisplayName}.

{{#tags}}
## {{name}}
 {{#issues}}
  {{#hasIssue}}
   {{#hasLink}}
### {{name}} [{{issue}}]({{link}}) {{title}} {{#hasIssueType}} *{{issueType}}* {{/hasIssueType}} {{#hasLabels}} {{#labels}} *{{.}}* {{/labels}} {{/hasLabels}}
   {{/hasLink}}
   {{^hasLink}}
### {{name}} {{issue}} {{title}} {{#hasIssueType}} *{{issueType}}* {{/hasIssueType}} {{#hasLabels}} {{#labels}} *{{.}}* {{/labels}} {{/hasLabels}}
   {{/hasLink}}
  {{/hasIssue}}
  {{^hasIssue}}
### {{name}}
  {{/hasIssue}}

{{#commits}}
**{{{messageTitle}}}**

{{#messageBodyItems}}
 * {{.}}
{{/messageBodyItems}}

[{{hash}}](https://github.com/{{ownerName}}/{{repoName}}/commit/{{hash}}) {{authorName}} *{{commitTime}}*

{{/issues}}
{{/tags}}
```

### Template - Semantic versioning from conventional commits

If you are using [conventional commits](https://www.conventionalcommits.org/en/v1.0.0/):

```shell
<type>[optional scope]: <description>

[optional body]

[optional footer(s)]
```

A changelog can be rendered (using [Helpers](https://github.com/tomasbjerre/git-changelog-lib#Helpers)) like this:

```hbs
# Changelog

{{#tags}}
{{#ifReleaseTag .}}
## [{{name}}](https://gitlab.com/html-validate/html-validate/compare/{{name}}) ({{tagDate .}})

{{#ifContainsType commits type='feat'}}
### Features

{{#commits}}
      {{#ifCommitType . type='feat'}}
 - {{#eachCommitScope .}} **{{.}}** {{/eachCommitScope}} {{{commitDescription .}}} ([{{hash}}](https://gitlab.com/html-validate/html-validate/commit/{{hashFull}}))
      {{/ifCommitType}}
    {{/commits}}
  {{/ifContainsType}}

{{#ifContainsType commits type='fix'}}
### Bug Fixes

{{#commits}}
      {{#ifCommitType . type='fix'}}
 - {{#eachCommitScope .}} **{{.}}** {{/eachCommitScope}} {{{commitDescription .}}} ([{{hash}}](https://gitlab.com/html-validate/html-validate/commit/{{hashFull}}))
      {{/ifCommitType}}
    {{/commits}}
  {{/ifContainsType}}

{{/ifReleaseTag}}
{{/tags}}
```

### Example - custom helpers

You can add your own helpers and use them in the template. There are also [built in Helpers](https://github.com/tomasbjerre/git-changelog-lib#Helpers).

```groovy
apply plugin: "se.bjurr.gitchangelog.git-changelog-gradle-plugin"

import se.bjurr.gitchangelog.plugin.gradle.HelperParam;
import com.github.jknack.handlebars.Helper;
import com.github.jknack.handlebars.Options;

task gitChangelogTask(type: se.bjurr.gitchangelog.plugin.gradle.GitChangelogTask) {
  file.set(new File("CHANGELOG.md"));
  handlebarsHelpers.set([
    new HelperParam("startsWith", new Helper<String>() {
      public Object apply(String from, Options options) throws IOException {
        def s = options.hash['s']
        if (from.matches("^" + s + ".*")) {
          return options.fn(this);
        } else {
          return options.inverse(this);
        }
      }
    }),
    new HelperParam("firstLetters", new Helper<String>() {
      public Object apply(String from, Options options) throws IOException {
        def number = new Integer(options.hash['number'])
        return from.substring(0,number);
      }
    })
  ])
  templateContent.set("""
  {{#commits}}
    {{#startsWith messageTitle s='feat'}}
      Starts with feat: "{{messageTitle}}"
      first 10 letters of hash is: {{firstLetters hash number='10'}}
    {{/startsWith}}
  {{/commits}}
  """);
}
```

### Get next release

It can also be used to get the next semantic version based on commits.

```groovy
buildscript {
 repositories {
  mavenCentral()
  mavenLocal()
 }
 dependencies {
  classpath 'se.bjurr.gitchangelog:git-changelog-lib:1.+'
 }
}

def nextVersion = se.bjurr.gitchangelog.api.GitChangelogApi.gitChangelogApiBuilder()
  .withSemanticMajorVersionPattern("^[Bb]reaking")
  .withSemanticMinorVersionPattern("[Ff]eature")
  .getNextSemanticVersion();

println "Next version:" + nextVersion.toString();
println " Major:" + nextVersion.getMajor();
println " Minor:" + nextVersion.getMinor();
println " Patch:" + nextVersion.getPatch();
```

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