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185 lines
19 KiB
Markdown
185 lines
19 KiB
Markdown
# **commit-analyzer**
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[**semantic-release**](https://github.com/semantic-release/semantic-release) plugin to analyze commits with [conventional-changelog](https://github.com/conventional-changelog/conventional-changelog)
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[](https://github.com/semantic-release/commit-analyzer/actions?query=workflow%3ATest+branch%3Amaster) [](https://www.npmjs.com/package/@semantic-release/commit-analyzer)
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[](https://www.npmjs.com/package/@semantic-release/commit-analyzer)
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[](https://www.npmjs.com/package/@semantic-release/commit-analyzer)
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| Step | Description |
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|------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------|
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| `analyzeCommits` | Determine the type of release by analyzing commits with [conventional-changelog](https://github.com/conventional-changelog/conventional-changelog). |
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## Install
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```bash
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$ npm install @semantic-release/commit-analyzer -D
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```
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## Usage
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The plugin can be configured in the [**semantic-release** configuration file](https://github.com/semantic-release/semantic-release/blob/master/docs/usage/configuration.md#configuration):
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```json
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{
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"plugins": [
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["@semantic-release/commit-analyzer", {
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"preset": "angular",
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"releaseRules": [
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{"type": "docs", "scope":"README", "release": "patch"},
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{"type": "refactor", "release": "patch"},
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{"type": "style", "release": "patch"}
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],
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"parserOpts": {
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"noteKeywords": ["BREAKING CHANGE", "BREAKING CHANGES"]
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}
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}],
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"@semantic-release/release-notes-generator"
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]
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}
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```
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With this example:
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- the commits that contains `BREAKING CHANGE` or `BREAKING CHANGES` in their body will be considered breaking changes.
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- the commits with a 'docs' `type`, a 'README' `scope` will be associated with a `patch` release
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- the commits with a 'refactor' `type` will be associated with a `patch` release
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- the commits with a 'style' `type` will be associated with a `patch` release
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**Note**: Your commits must be formatted **exactly** as specified by the chosen convention. For example the [Angular Commit Message Conventions](https://github.com/angular/angular.js/blob/master/DEVELOPERS.md#-git-commit-guidelines) require the `BREAKING CHANGE` keyword to be followed by a colon (`:`) and to be in the **footer** of the commit message.
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## Configuration
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### Options
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| Option | Description | Default |
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|----------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|-----------------------------------------------------------------------------------------------------------------------------------|
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| `preset` | [conventional-changelog](https://github.com/conventional-changelog/conventional-changelog) preset (possible values: [`angular`](https://github.com/conventional-changelog/conventional-changelog/tree/master/packages/conventional-changelog-angular), [`atom`](https://github.com/conventional-changelog/conventional-changelog/tree/master/packages/conventional-changelog-atom), [`codemirror`](https://github.com/conventional-changelog/conventional-changelog/tree/master/packages/conventional-changelog-codemirror), [`ember`](https://github.com/conventional-changelog/conventional-changelog/tree/master/packages/conventional-changelog-ember), [`eslint`](https://github.com/conventional-changelog/conventional-changelog/tree/master/packages/conventional-changelog-eslint), [`express`](https://github.com/conventional-changelog/conventional-changelog/tree/master/packages/conventional-changelog-express), [`jquery`](https://github.com/conventional-changelog/conventional-changelog/tree/master/packages/conventional-changelog-jquery), [`jshint`](https://github.com/conventional-changelog/conventional-changelog/tree/master/packages/conventional-changelog-jshint), [`conventionalcommits`](https://github.com/conventional-changelog/conventional-changelog/tree/master/packages/conventional-changelog-conventionalcommits)). | [`angular`](https://github.com/conventional-changelog/conventional-changelog/tree/master/packages/conventional-changelog-angular) |
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| `config` | npm package name of a custom [conventional-changelog](https://github.com/conventional-changelog/conventional-changelog) preset. | - |
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| `parserOpts` | Additional [conventional-commits-parser](https://github.com/conventional-changelog/conventional-changelog/tree/master/packages/conventional-commits-parser#conventionalcommitsparseroptions) options that will extends the ones loaded by `preset` or `config`. This is convenient to use a [conventional-changelog](https://github.com/conventional-changelog/conventional-changelog) preset with some customizations without having to create a new module. | - |
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| `releaseRules` | An external module, a path to a module or an `Array` of rules. See [`releaseRules`](#releaserules). | See [`releaseRules`](#releaserules) |
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| `presetConfig` | Additional configuration passed to the [conventional-changelog](https://github.com/conventional-changelog/conventional-changelog) preset. Used for example with [conventional-changelog-conventionalcommits](https://github.com/conventional-changelog/conventional-changelog-config-spec/blob/master/versions/2.0.0/README.md). | - |
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**Notes**: in order to use a `preset` it must be installed (for example to use the [eslint preset](https://github.com/conventional-changelog/conventional-changelog/tree/master/packages/conventional-changelog-eslint) you must install it with `npm install conventional-changelog-eslint -D`)
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**Note**: `config` will be overwritten by the values of `preset`. You should use either `preset` or `config`, but not both.
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**Note**: Individual properties of `parserOpts` will override ones loaded with an explicitly set `preset` or `config`. If `preset` or `config` are not set, only the properties set in `parserOpts` will be used.
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**Note**: For presets that expects a configuration object, such as [`conventionalcommits`](https://github.com/conventional-changelog/conventional-changelog/tree/master/packages/conventional-changelog-conventionalcommits), the `presetConfig` option **must** be set.
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#### releaseRules
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Release rules are used when deciding if the commits since the last release warrant a new release. If you define custom release rules the [default rules](lib/default-release-rules.js) will be used if nothing matched. Those rules will be matched against the commit objects resulting of [conventional-commits-parser](https://github.com/conventional-changelog/conventional-changelog/tree/master/packages/conventional-commits-parser) parsing. Each rule property can be defined as a [glob](https://github.com/micromatch/micromatch#matching-features).
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##### Rules definition
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This is an `Array` of rule objects. A rule object has a `release` property and 1 or more criteria.
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```json
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{
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"plugins": [
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["@semantic-release/commit-analyzer", {
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"preset": "angular",
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"releaseRules": [
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{"type": "docs", "scope": "README", "release": "patch"},
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{"type": "refactor", "scope": "core-*", "release": "minor"},
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{"type": "refactor", "release": "patch"},
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{"scope": "no-release", "release": false}
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]
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}],
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"@semantic-release/release-notes-generator"
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]
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}
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```
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##### Rules matching
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Each commit will be compared with each rule and when it matches, the commit will be associated with the release type in the rule's `release` property. If a commit match multiple rules, the highest release type (`major` > `minor` > `patch`) is associated with the commit.
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See [release types](lib/default-release-types.js) for the release types hierarchy.
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With the previous example:
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- Commits with `type` 'docs' and `scope` 'README' will be associated with a `patch` release.
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- Commits with `type` 'refactor' and `scope` starting with 'core-' (i.e. 'core-ui', 'core-rules', ...) will be associated with a `minor` release.
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- Other commits with `type` 'refactor' (without `scope` or with a `scope` not matching the glob `core-*`) will be associated with a `patch` release.
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- Commits with scope `no-release` will not be associated with a release type.
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##### Default rules matching
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If a commit doesn't match any rule in `releaseRules` it will be evaluated against the [default release rules](lib/default-release-rules.js).
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With the previous example:
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- Commits with a breaking change will be associated with a `major` release.
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- Commits with `type` 'feat' will be associated with a `minor` release.
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- Commits with `type` 'fix' will be associated with a `patch` release.
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- Commits with `type` 'perf' will be associated with a `patch` release.
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- Commits with scope `no-release` will not be associated with a release type even if they have a breaking change or the `type` 'feat', 'fix' or 'perf'.
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##### No rules matching
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If a commit doesn't match any rules in `releaseRules` or in [default release rules](lib/default-release-rules.js) then no release type will be associated with the commit.
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With the previous example:
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- Commits with `type` 'style' will not be associated with a release type.
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- Commits with `type` 'test' will not be associated with a release type.
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- Commits with `type` 'chore' will not be associated with a release type.
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##### Multiple commits
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If there is multiple commits that match one or more rules, the one with the highest release type will determine the global release type.
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Considering the following commits:
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- `docs(README): Add more details to the API docs`
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- `feat(API): Add a new method to the public API`
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With the previous example the release type determined by the plugin will be `minor`.
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##### Specific commit properties
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The properties to set in the rules will depends on the commit style chosen. For example [conventional-changelog-angular](https://github.com/conventional-changelog/conventional-changelog/blob/master/packages/conventional-changelog-angular) use the commit properties `type`, `scope` and `subject` but [conventional-changelog-eslint](https://github.com/conventional-changelog/conventional-changelog/blob/master/packages/conventional-changelog-eslint) uses `tag` and `message`.
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For example with `eslint` preset:
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```json
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{
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"plugins": [
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["@semantic-release/commit-analyzer", {
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"preset": "eslint",
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"releaseRules": [
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{"tag": "Docs", "message":"*README*", "release": "patch"},
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{"tag": "New", "release": "patch"}
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]
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}],
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"@semantic-release/release-notes-generator"
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]
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}
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```
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With this configuration:
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- Commits with `tag` 'Docs', that contains 'README' in their header message will be associated with a `patch` release.
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- Commits with `tag` 'New' will be associated with a `patch` release.
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- Commits with `tag` 'Breaking' will be associated with a `major` release (per [default release rules](lib/default-release-rules.js)).
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- Commits with `tag` 'Fix' will be associated with a `patch` release (per [default release rules](lib/default-release-rules.js)).
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- Commits with `tag` 'Update' will be associated with a `minor` release (per [default release rules](lib/default-release-rules.js)).
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- All other commits will not be associated with a release type.
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##### External package / file
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`releaseRules` can also reference a module, either by it's `npm` name or path:
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```json
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{
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"plugins": [
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["@semantic-release/commit-analyzer", {
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"preset": "angular",
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"releaseRules": "./config/release-rules.js"
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}],
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"@semantic-release/release-notes-generator"
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]
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}
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```
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```js
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// File: config/release-rules.js
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module.exports = [
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{type: 'docs', scope: 'README', release: 'patch'},
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{type: 'refactor', scope: 'core-*', release: 'minor'},
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{type: 'refactor', release: 'patch'},
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];
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```
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