# GitLab CI template for semantic-release
This project implements a GitLab CI/CD template to automate your versioning and release management with [semantic-release](https://github.com/semantic-release/semantic-release), supporting one or several of the following features:
* determine the next release version number,
* generate the changelog,
* commit any changed resource to the Git repository,
* create and push the Git tag,
* publish the packages (in [GitLab](https://docs.gitlab.com/ee/user/project/releases/index.html) or any other package repository of your choice),
* any additional custom behavior you are able to script, triggered on the [release steps](https://semantic-release.gitbook.io/semantic-release/#release-steps).
## Usage
This template can be used both as a [CI/CD component](https://docs.gitlab.com/ee/ci/components/#use-a-component-in-a-cicd-configuration) or using the legacy [`include:project`](https://docs.gitlab.com/ee/ci/yaml/index.html#includeproject) syntax.
### Use as a CI/CD component
Add the following to your `gitlab-ci.yml`:
```yaml
include:
# 1: include the component
- component: gitlab.com/to-be-continuous/semantic-release/gitlab-ci-semrel@3.9.0
# 2: set/override component inputs
inputs:
changelog-enabled: true # ⚠ this is only an example
```
### Use as a CI/CD template (legacy)
Add the following to your `gitlab-ci.yml`:
```yaml
include:
# 1: include the template
- project: 'to-be-continuous/semantic-release'
ref: '3.9.0'
file: '/templates/gitlab-ci-semrel.yml'
variables:
# 2: set/override template variables
SEMREL_CHANGELOG_ENABLED: "true" # ⚠ this is only an example
```
## Global configuration
The semantic-release template uses some global configuration used throughout all jobs.
| Input / Variable | Description | Default value |
| -------------------------------------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | --------------------------------------------- |
| `image` / `SEMREL_IMAGE` | The Docker image used to run semantic-release | `registry.hub.docker.com/library/node:latest` |
| `version` / `SEMREL_VERSION` | The [semantic-release](https://www.npmjs.com/package/semantic-release) version to use | `latest` |
| `exec-version` / `SEMREL_EXEC_VERSION` | The [@semantic-release/exec](https://www.npmjs.com/package/@semantic-release/exec) version to use | `latest` |
| :lock: `GITLAB_TOKEN` | A GitLab [project access token](https://docs.gitlab.com/ee/user/project/settings/project_access_tokens.html) or [personal access token](https://docs.gitlab.com/ce/user/profile/personal_access_tokens.html) with `api`, `read_repository` and `write repository` scopes. :warning: This variable is **mandatory** and [defined by `semantic-release`](https://github.com/semantic-release/semantic-release/blob/master/docs/usage/ci-configuration.md#push-access-to-the-remote-repository) itself. | _none_ |
| :lock: `GIT_AUTHOR_EMAIL` | A Git author email address associated with the `GITLAB_TOKEN` [bot user](https://docs.gitlab.com/ee/user/project/settings/project_access_tokens.html#bot-users-for-projects). This is [defined by `semantic-release`](https://semantic-release.gitbook.io/semantic-release/usage/configuration#git-environment-variables) itself, and **required if** the [verify-user push rules](https://docs.gitlab.com/ee/user/project/repository/push_rules.html#verify-users) enabled for the project | _none_ |
| :lock: `GIT_COMMITTER_EMAIL` | A Git committer email address associated with the `GITLAB_TOKEN` [bot user](https://docs.gitlab.com/ee/user/project/settings/project_access_tokens.html#bot-users-for-projects). This is [defined by `semantic-release`](https://semantic-release.gitbook.io/semantic-release/usage/configuration#git-environment-variables) itself, and **required if** the [verify-user push rules](https://docs.gitlab.com/ee/user/project/repository/push_rules.html#verify-users) enabled for the project | _none_ |
| `config-dir` / `SEMREL_CONFIG_DIR` | directory containing your [semantic-release configuration](https://semantic-release.gitbook.io/semantic-release/usage/configuration#configuration-file) | `.` |
| `required-plugins-file` / `SEMREL_REQUIRED_PLUGINS_FILE` | An optional file for additional npm packages to install | `semrel-required-plugins.txt` |
Jobs will extract required plugin packages from discovered configuration. If your configuration needs additional packages, add them, one per line, to `SEMREL_REQUIRED_PLUGINS_FILE` file. Each line must be a valid `npm install` package argument.
## Jobs
### `semantic-release` job
This job runs `semantic-release` in `ci` mode.
:warning: This template supports all [semantic-release configuration files](https://semantic-release.gitbook.io/semantic-release/usage/configuration#configuration-file) __except for__ `release.config.js` and custom CLI arguments.
If no configuration is found, the template will generate one with the following options:
* `debug`: `true` if the `$TRACE` variable is set, `false` otherwise
* `dryRun`: `true` if the `$SEMREL_DRY_RUN` variable is set, `false` otherwise
* `tagFormat`: see `$SEMREL_TAG_FORMAT` variable
* `plugins`:
* [@semantic-release/commit-analyzer](https://github.com/semantic-release/commit-analyzer)
* [@semantic-release/release-notes-generator](https://github.com/semantic-release/release-notes-generator)
* [@semantic-release/gitlab](https://github.com/semantic-release/gitlab)
* [@semantic-release/git](https://github.com/semantic-release/git)
* optional [@semantic-release/changelog](https://github.com/semantic-release/changelog) if `SEMREL_CHANGELOG_ENABLED` is set to `true`
* optional [@semantic-release/exec](https://github.com/semantic-release/exec) if any hook script is found (see [hook scripts](#hook_scripts))
* `branches`: `master`
#### Variables
As specified in the previous chapter, these variables are only used to generated a `.releaserc` when no configuration is found in the repository.
| Input / Variable | Description | Default value |
| ------------------------------------------------------ | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------- |
| `changelog-enabled` / `SEMREL_CHANGELOG_ENABLED` | Add the [@semantic-release/changelog](https://github.com/semantic-release/changelog) plugin which will commit a changelog file in the repository if set to `true`. | _none_ |
| `changelog-file` / `SEMREL_CHANGELOG_FILE` | [changelogFile @semantic-release/changelog option](https://github.com/semantic-release/changelog#options). | _none_ (use the plugin default value which is `CHANGELOG.md`). |
| `changelog-title` / `SEMREL_CHANGELOG_TITLE` | [changelogTitle @semantic-release/changelog option](https://github.com/semantic-release/changelog#options). You might want to use markdown format (for example `# MyApp Changelog`). | _none_ |
| `dry-run` / `SEMREL_DRY_RUN` | Activate the [dryRun semantic-release option](https://github.com/semantic-release/semantic-release/blob/master/docs/usage/configuration.md#dryrun) if present. | _none_ |
| `auto-release-enabled` / `SEMREL_AUTO_RELEASE_ENABLED` | When set to `true` the job start automatically. When not set (default), the job is manual. | _none_ |
| `branches-ref` / `SEMREL_BRANCHES_REF` | Regular expression pattern matching branches from which releases should happen (should match your [semantic-release configuration](https://semantic-release.gitbook.io/semantic-release/usage/configuration#branches)) | `$PROD_REF` ([global _to be continuous_ variable](https://to-be-continuous.gitlab.io/doc/usage/#production-and-integration-branches)) |
| `tag-format` / `SEMREL_TAG_FORMAT` | [tagFormat semantic-release option](https://github.com/semantic-release/semantic-release/blob/master/docs/usage/configuration.md#tagformat). :warning: don't forget to double the `$` character so it is not interpreted by GitLab. | `$${version}` |
| `hooks-dir` / `SEMREL_HOOKS_DIR` | [Hook scripts](#hook_scripts) folder. | `.` |
| `commit-message` / `SEMREL_COMMIT_MESSAGE` | Add a custom commit message based on [semantic-release/git option](https://github.com/semantic-release/git#message). | _none_ (uses semantic-release default commit message) |
| `release-disabled` / `SEMREL_RELEASE_DISABLED` | Disable this job. | _none_ |
| `semantic-release-job-tags` / `DOCKER_SEMANTIC_RELEASE_JOB_TAGS` | Tags to be used for selecting runners for the job | `[]` |
#### Hook scripts
The generated `.releaserc` will include the [@semantic-release/exec](https://github.com/semantic-release/exec) plugin if any of the following scripts is found in the `$SEMREL_HOOKS_DIR` folder:
##### verify-conditions.sh
See [exec verifyConditionsCmd](https://github.com/semantic-release/exec#verifyconditionscmd).
Parameters: _none_
##### verify-release.sh
See [exec verifyReleaseCmd](https://github.com/semantic-release/exec#verifyreleasecmd).
Parameters:
1. Last release version
2. next release version
3. next release type
##### prepare.sh
See [exec prepareCmd](https://github.com/semantic-release/exec#preparecmd).
Parameters:
1. Last release version
2. next release version
3. next release type
##### publish.sh
See [exec publishCmd](https://github.com/semantic-release/exec#publishcmd).
Parameters:
1. Last release version
2. next release version
3. release branch
4. commits count
5. current date
##### success.sh
See [exec successCmd](https://github.com/semantic-release/exec#successcmd).
Parameters:
1. Last release version
2. next release version
##### fail.sh
See [exec failcmd](https://github.com/semantic-release/exec#failcmd).
Parameters:
1. Last release version
2. next release version
#### Signing release commits with GPG
For an introduction on commit signing, see [GitLab documentation](https://docs.gitlab.com/ee/user/project/repository/gpg_signed_commits/).
To make semantic-release sign its commits, use the following variable.
| Input / Variable | Description | Default value |
| --------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------- |
| :lock: `SEMREL_GPG_SIGNKEY` | Path to the GPG signkey exported with `gpg --armor --export-secret-key`<br/>:warning: Declare as a masked [project variable of File type](https://docs.gitlab.com/ee/ci/variables/#cicd-variable-types). | _none_ |
### `semantic-release-info` job
This job (disabled by default) runs `semantic-release` with `dry-run` mode in `.pre` stage to save the following variables as [dotenv artifact](https://docs.gitlab.com/ee/ci/pipelines/job_artifacts.html#artifactsreportsdotenv) making them available for the next pipeline stages:
* `SEMREL_INFO_LAST_VERSION`: latest released version
* `SEMREL_INFO_NEXT_VERSION`: next release version (based on actual commits and comments)
* `SEMREL_INFO_NEXT_VERSION_TYPE`: next release type (`major`|`minor`|`patch`)
:warning: `SEMREL_INFO_NEXT_VERSION` and `SEMREL_INFO_NEXT_VERSION_TYPE` **wont** be available when semantic-release commits analysis determine that no release will be performed.
This job can be enabled by defining the `SEMREL_INFO_ON` variable:
* `prod` to enable on production branch only (`main` or `master` by default with `PROD_REF` environment variable)
* `branches-ref` to enable on branches associated with `branches-ref` component configuration or `SEMREL_BRANCHES_REF` environment variable (`main` or `master` by default as it fallbacks on `PROD_REF` environment variable).
* `protected` to enable on protected references
* `all` to enable on all Git references. :warning: Beware that this job requires the `GITLAB_TOKEN` variable so you must unprotect it (this will make privilege escalation possible from developer to maintainer).
## Secrets management
Here are some advices about your **secrets** (variables marked with a :lock:):
1. Manage them as [project or group CI/CD variables](https://docs.gitlab.com/ee/ci/variables/#add-a-cicd-variable-to-a-project):
* [**masked**](https://docs.gitlab.com/ee/ci/variables/#mask-a-cicd-variable) to prevent them from being inadvertently
displayed in your job logs,
* [**protected**](https://docs.gitlab.com/ee/ci/variables/#protected-cicd-variables) if you want to secure some secrets
you don't want everyone in the project to have access to (for instance production secrets).
2. In case a secret contains [characters that prevent it from being masked](https://docs.gitlab.com/ee/ci/variables/#mask-a-cicd-variable),
simply define its value as the [Base64](https://en.wikipedia.org/wiki/Base64) encoded value prefixed with `@b64@`:
it will then be possible to mask it and the template will automatically decode it prior to using it.
3. Don't forget to escape special characters (ex: `$` -> `$$`).
4. You can also manage secrets using Vault variant
## Variants
The Docker template can be used in conjunction with template variants to cover specific cases.
### Vault variant
This variant allows delegating your secrets management to a [Vault](https://www.vaultproject.io/) server.
#### Configuration
In order to be able to communicate with the Vault server, the variant requires the additional configuration parameters:
| Input / Variable | Description | Default value |
| ----------------------------------- | ------------------------------------------------------------------------------------------------------------------------------- | -------------------------------------------------------------------------- |
| `TBC_VAULT_IMAGE` | The [Vault Secrets Provider](https://gitlab.com/to-be-continuous/tools/vault-secrets-provider) image to use (can be overridden) | `registry.gitlab.com/to-be-continuous/tools/vault-secrets-provider:latest` |
| `vault-base-url` / `VAULT_BASE_URL` | The Vault server base API url | _none_ |
| `vault-oidc-aud` / `VAULT_OIDC_AUD` | The `aud` claim for the JWT | `$CI_SERVER_URL` |
| :lock: `VAULT_ROLE_ID` | The [AppRole](https://www.vaultproject.io/docs/auth/approle) RoleID | **must be defined** |
| :lock: `VAULT_SECRET_ID` | The [AppRole](https://www.vaultproject.io/docs/auth/approle) SecretID | **must be defined** |
#### Usage
Then you may retrieve any of your secret(s) from Vault using the following syntax:
```text
@url@http://vault-secrets-provider/api/secrets/{secret_path}?field={field}
```
With:
| Parameter | Description |
| -------------------------------- | --------------------------------------------------------------------- |
| `secret_path` (_path parameter_) | this is your secret location in the Vault server |
| `field` (_query parameter_) | parameter to access a single basic field from the secret JSON payload |
#### Example
```yaml
include:
# main template
- component: gitlab.com/to-be-continuous/semantic-release/gitlab-ci-semrel@3.9.0
# Vault variant
- component: gitlab.com/to-be-continuous/semantic-release/gitlab-ci-semrel-vault@3.9.0
inputs:
vault-base-url: "https://vault.acme.host/v1"
# audience claim for JWT
vault-oidc-aud: "https://vault.acme.host"
variables:
# Secrets managed by Vault
GITLAB_TOKEN: "@url@http://vault-secrets-provider/api/secrets/b7ecb6ebabc231/semantic-release/token?field=group-access-token"
# $VAULT_ROLE_ID and $VAULT_SECRET_ID defined as a secret CI/CD variable
```