Pre-release (rc, beta, alpha) will only extend {{version}} as tag for…

… tag-semver
docker · Nov 20, 2020 · 7cb65aa · 7cb65aa
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diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Changelog
 
+## 1.8.4 (2020/11/20)
+
+* Pre-release (rc, beta, alpha) will only extend `{{version}}` as tag for `tag-semver`
+
 ## 1.8.3 (2020/11/20)
 
 * Lowercase image name (#16)

diff --git a/README.md b/README.md
@@ -26,8 +26,8 @@ ___
   * [outputs](#outputs)
 * [Notes](#notes)
   * [Latest tag](#latest-tag)
-  * [`tag-match` examples](#tag-match-examples)
   * [Handle semver tag](#handle-semver-tag)
+  * [`tag-match` examples](#tag-match-examples)
   * [Schedule tag](#schedule-tag)
   * [Overwrite labels](#overwrite-labels)
 * [Keep up-to-date with GitHub Dependabot](#keep-up-to-date-with-github-dependabot)
@@ -250,6 +250,8 @@ Following inputs can be used as `step.with` keys
 
 > List/CSV type can be a newline or comma delimited string
 
+> `tag-semver` and `tag-match` are mutually exclusive
+
 ### outputs
 
 Following outputs are available
@@ -266,18 +268,8 @@ Following outputs are available
 
 Latest Docker tag will be generated by default on `push tag` event. If for example you push the `v1.2.3` Git tag,
 you will have at the output of this action the Docker tags `v1.2.3` and `latest`. But you can allow the latest tag to be
-generated only if the Git tag matches a regular expression with the [`tag-match` input](#tag-match-examples) or if
-`tag-semver` is valid [semver](https://semver.org/).
-
-### `tag-match` examples
-
-| Git tag                 | `tag-match`                        | `tag-match-group` | Match                | Output tags               | Output version               |
-|-------------------------|------------------------------------|-------------------|----------------------|---------------------------|------------------------------|
-| `v1.2.3`                | `\d{1,3}.\d{1,3}.\d{1,3}`          | `0`               | :white_check_mark:   | `1.2.3`, `latest`         | `1.2.3`                      |
-| `v2.0.8-beta.67`        | `v(.*)`                            | `1`               | :white_check_mark:   | `2.0.8-beta.67`, `latest` | `2.0.8-beta.67`              |
-| `v2.0.8-beta.67`        | `v(\d.\d)`                         | `1`               | :white_check_mark:   | `2.0`, `latest`           | `2.0`                        |
-| `release1`              | `\d{1,3}.\d{1,3}`                  | `0`               | :x:                  | `release1`                | `release1`                   |
-| `20200110-RC2`          | `\d+`                              | `0`               | :white_check_mark:   | `20200110`, `latest`      | `20200110`                   |
+generated only if `tag-semver` is a valid [semver](https://semver.org/) or if Git tag matches a regular expression
+with the [`tag-match` input](#tag-match-examples).
 
 ### Handle semver tag
 
@@ -293,14 +285,25 @@ If Git tag is a valid [semver](https://semver.org/) you can handle it to output
 | `v1.2.3`           | `{{minor}}`                                              | :white_check_mark: | `2`, `latest`              | `2`                          |
 | `v1.2.3`           | `{{patch}}`                                              | :white_check_mark: | `3`, `latest`              | `3`                          |
 | `v1.2.3`           | `{{major}}.{{minor}}`<br>`{{major}}.{{minor}}.{{patch}}` | :white_check_mark: | `1.2`, `1.2.3`, `latest`   | `1.2`*                       |
-| `v2.0.8-beta.67`   | `{{raw}}`                                                | :white_check_mark: | `2.0.8-beta.67`            | `2.0.8-beta.67`             |
+| `v2.0.8-beta.67`   | `{{raw}}`                                                | :white_check_mark: | `2.0.8-beta.67`**          | `2.0.8-beta.67`              |
 | `v2.0.8-beta.67`   | `{{version}}`                                            | :white_check_mark: | `2.0.8-beta.67`            | `2.0.8-beta.67`              |
 | `v2.0.8-beta.67`   | `{{major}}.{{minor}}`                                    | :white_check_mark: | `2.0.8-beta.67`**          | `2.0.8-beta.67`              |
 | `release1`         | `{{raw}}`                                                | :x:                | `release1`                 | `release1`                   |
 
 > *First occurrence of `tag-semver` will be taken as `output.version`
 
-> **Pre-release (rc, beta, alpha) will only extend `{{version}}` as tag
+> **Pre-release (rc, beta, alpha) will only extend `{{version}}` as tag because they are updated frequently,
+> and contain many breaking changes that are (by the author's design) not yet fit for public consumption.
+
+### `tag-match` examples
+
+| Git tag                 | `tag-match`                        | `tag-match-group` | Match                | Output tags               | Output version               |
+|-------------------------|------------------------------------|-------------------|----------------------|---------------------------|------------------------------|
+| `v1.2.3`                | `\d{1,3}.\d{1,3}.\d{1,3}`          | `0`               | :white_check_mark:   | `1.2.3`, `latest`         | `1.2.3`                      |
+| `v2.0.8-beta.67`        | `v(.*)`                            | `1`               | :white_check_mark:   | `2.0.8-beta.67`, `latest` | `2.0.8-beta.67`              |
+| `v2.0.8-beta.67`        | `v(\d.\d)`                         | `1`               | :white_check_mark:   | `2.0`, `latest`           | `2.0`                        |
+| `release1`              | `\d{1,3}.\d{1,3}`                  | `0`               | :x:                  | `release1`                | `release1`                   |
+| `20200110-RC2`          | `\d+`                              | `0`               | :white_check_mark:   | `20200110`, `latest`      | `20200110`                   |
 
 ### Schedule tag
 

diff --git a/__tests__/meta.test.ts b/__tests__/meta.test.ts
@@ -715,7 +715,7 @@ describe('push tag', () => {
       'event_tag_v2.0.8-beta.67.env',
       {
         images: ['org/app', 'ghcr.io/user/app'],
-        tagSemver: ['{{version}}', '{{major}}.{{minor}}', '{{major}}'],
+        tagSemver: ['{{major}}.{{minor}}', '{{major}}'],
       } as Inputs,
       {
         main: '2.0.8-beta.67',

diff --git a/dist/index.js b/dist/index.js
diff --git a/src/meta.ts b/src/meta.ts
@@ -47,9 +47,11 @@ export class Meta {
         const sver = semver.parse(version.main, {
           includePrerelease: true
         });
-        version.latest = !semver.prerelease(version.main);
-        version.main = handlebars.compile(this.inputs.tagSemver[0])(sver);
-        if (version.latest) {
+        if (semver.prerelease(version.main)) {
+          version.main = handlebars.compile('{{version}}')(sver);
+        } else {
+          version.latest = true;
+          version.main = handlebars.compile(this.inputs.tagSemver[0])(sver);
           for (const semverTpl of this.inputs.tagSemver) {
             const partial = handlebars.compile(semverTpl)(sver);
             if (partial == version.main) {