| `DOCKER_PROD_PUBLISH_STRATEGY`| Defines the publish to production strategy. One of `manual` (i.e. _one-click_), `auto` or `none` (disabled). | `manual` |
| `DOCKER_RELEASE_EXTRA_TAGS_PATTERN` | Defines the image tag pattern that `$DOCKER_RELEASE_IMAGE` should match to push extra tags (supports capturing groups - [see below](#using-extra-tags)) | `^v?(?P<major>[0-9]+)\\.(?P<minor>[0-9]+)\\.(?P<patch>[0-9]+)(?P<suffix>(?P<prerelease>-[0-9A-Za-z-\\.]+)?(?P<build>\\+[0-9A-Za-z-\\.]+)?)$` _(SemVer pattern)_ |
| `DOCKER_RELEASE_EXTRA_TAGS` | Defines extra tags to publish the _release_ image (supports capturing group references from `$DOCKER_RELEASE_EXTRA_TAGS_PATTERN` - [see below](#using-extra-tags)) | _(none)_ |
| `DOCKER_SEMREL_RELEASE_DISABLED` | Set to `true` to disable [semantic-release integration](#semantic-release-integration) | _none_ (enabled) |
This job produces _output variables_ that are propagated to downstream jobs (using [dotenv artifacts](https://docs.gitlab.com/ee/ci/pipelines/job_artifacts.html#artifactsreportsdotenv)):
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@@ -439,7 +441,51 @@ This job produces _output variables_ that are propagated to downstream jobs (usi
They may be freely used in downstream jobs (for instance to deploy the upstream built Docker image, whatever the branch or tag).
### `semantic-release` integration
#### Using extra tags
When publishing the _release_ image, the Docker template might publish it again with additional tags (aliases):
* the original published image tag (extracted from `$DOCKER_RELEASE_IMAGE`) must match `$DOCKER_RELEASE_EXTRA_TAGS_PATTERN` ([semantic versioning](https://semver.org/) pattern by default),
* extra tags to publish can be defined in the `$DOCKER_RELEASE_EXTRA_TAGS` variable, each separated with a whitespace.
:information_source: the Docker template supports [group references substitution](https://learnbyexample.github.io/py_regular_expressions/groupings-and-backreferences.html) to evaluate extra tags:
*`v([0-9]+)\.([0-9]+)\.([0-9]+)` has 3 (unnamed) capturing groups, each capturing any number of digits
*`v(P<major>[0-9]+)\.(P<minor>[0-9]+)\.(P<patch>[0-9]+)` has 3 **named** capturing groups (_major_, _minor_ and _patch_), each capturing any number of digits
*`$DOCKER_RELEASE_EXTRA_TAGS` supports capturing group references from `$DOCKER_RELEASE_EXTRA_TAGS_PATTERN`:
*`\g1` is a reference to capturing group number 1
*`\g<major>` is a reference to capturing group named _major_
:information_source: the default value of `$DOCKER_RELEASE_EXTRA_TAGS_PATTERN` matches and captures all parts of a standard [semantic versioning](https://semver.org/)-compliant tag:
* the **major** group captures the major version
* the **minor** group captures the minor version
* the **patch** group captures the patch version
* the **prerelease** group captures the (optional) pre-release version (including the leading `-`)
* the **build** group captures the (optional) build version (including the leading `+`)
* the **suffix** group captures the (optional) entire suffix (including pre-release and/or build)
Example: publish latest, major.minor and major aliases for a SemVer release:
```yaml
variables:
# ⚠ don't forget to escape backslash character in yaml
If you activate the [`semantic-release-info` job from the `semantic-release` template](https://gitlab.com/to-be-continuous/semantic-release/#semantic-release-info-job), the `docker-publish` job will rely on the generated next version info.
"description":"Defines the image tag pattern that `$DOCKER_RELEASE_IMAGE` should match to push extra tags (supports capturing groups)\n\nDefaults to [SemVer](https://semver.org/) pattern.",
"description":"Defines extra tags to publish the _release_ image\n\nSupports capturing group references from `$DOCKER_RELEASE_EXTRA_TAGS_PATTERN` (ex: `latest \\g<major>.\\g<minor> \\g<major>`)",
log_warn "\\e[93mYou should consider distinguishing snapshot and release images as they do not differ. Skipping publish phase as image has already been created by previous job.\\e[0m"
