✨ import enhancements done in trutificationdemo (#29)

- setting back the "cherry-pick" label for selecting backports. The
reason is that there are other parts in the repository that rely on a
pre-stablished "cherry-pick" label like for instance
https://github.com/trustification/release-tools/blob/main/pkg/config/config.yaml#L96-L99
- The problem in the past seems to be that we could not find a regex
that math the cherry-pick labels but while enhancing the
trustificationdemo org I fixed it using
```yaml
label_pattern: >-
            ^cherry-pick\/([^ ]+)$
```

- Enhancing the Title verification error, now the GH log will contain
which are the valid title prefixes.
- Introduce the create-release reusable action for generating releases
and changelogs

Author: carlosthe19916

.github/workflows/cherry-pick.yaml

@@ -23,8 +23,8 @@ jobs:
             const labels = issue.labels.map(label => label.name);
             console.log(`Labels: ${labels}`);
 
-            const branches = labels.filter(label => label.startsWith('backport '))
-              .map(label => label.substr(9));
+            const branches = labels.filter(label => label.startsWith('cherry-pick/'))
+              .map(label => label.substr(12));
             console.log(`Branches: ${branches}`);
 
             return branches
@@ -54,4 +54,6 @@ jobs:
         uses: korthout/backport-action@v3
         with:
           github_token: ${{ steps.get_workflow_token.outputs.token }}
+          label_pattern: >-
+            ^cherry-pick\/([^ ]+)$
           pull_title: '${pull_title} [Backport ${target_branch}]'

cmd/verify-pr/src/main.rs

@@ -16,6 +16,15 @@ struct PullRequestEvent {
 }
 
 fn main() -> error::Result<()> {
+    let result = verify_pr();
+    match &result {
+        Ok(_) => {}
+        Err(error) => println!("{error}"),
+    };
+    result
+}
+
+fn verify_pr() -> error::Result<()> {
     let gh_context = GitHubVariables::from_env()?;
 
     // Parse the event

create-release/action.yml

@@ -0,0 +1,85 @@
+name: Create Release
+description: Create a release in a project
+inputs:
+  github_token:
+    description: 'GitHub token'
+    required: true
+  version:
+    description: 'Semantic version of the release (eg. v1.2.3 or v1.2.3-alpha.2)'
+    required: true
+  prev_version:
+    description: 'Semantic version of the previous release (eg. v1.2.2 or v1.2.3-alpha.1)'
+    required: false
+    default: ''
+  repository:
+    description: 'The repository where the release should be created'
+    required: false
+    default: ${{ github.repository }}
+  ref:
+    description: 'The branch or SHA for the release (defaults to main)'
+    required: false
+    default: ${{ github.ref }}
+  is_prerelease:
+    description: 'Is this a pre-release?'
+    required: false
+    default: "false" 
+
+runs:
+  using: "composite"
+  steps:
+  - name: Verify tag is semver
+    shell: bash
+    run: |
+      set -x
+      if [[ ! "${{ inputs.version }}" =~ ^v[0-9]+\.[0-9]+\.[0-9]+(-[0-9A-Za-z-]+(\.[0-9A-Za-z-]+)*)?$ ]]; then
+        echo "This is not a semver compliant tag"
+        echo "Exiting"
+        exit 1
+      fi
+
+      if [[ "${{ inputs.version }}" =~ ^v[0-9]+\.[0-9]+\.[0-9]+$ ]]; then
+        echo "is_prerelease=false" >> $GITHUB_OUTPUT
+      else
+        echo "is_prerelease=true" >> $GITHUB_OUTPUT
+      fi
+
+      if [[ "${{ inputs.version }}" =~ ^v[0-9]+\.[0-9]+\.0$ ]]; then
+        echo "is_dotzero=true" >> $GITHUB_OUTPUT
+      else
+        echo "is_dotzero=false" >> $GITHUB_OUTPUT
+      fi
+
+      XY_VERSION=$(echo ${{ inputs.version }} | awk -F. '{print substr($1,2)"."$2}')
+      echo "xy_version=${XY_VERSION}" >> $GITHUB_OUTPUT
+    id: check_tag
+
+  - name: Checkout code
+    uses: actions/checkout@v4
+
+  - name: Generate Changelog
+    uses: ./.github/workflows/generate-changelog.yml
+    with:
+      version: ${{ github.event.inputs.version }}
+      prev_version: ${{ github.event.inputs.prev_version }}
+      repository: ${{ github.event.inputs.repository }}
+      ref: ${{ github.event.inputs.ref }}
+      github_token: ${{ inputs.github_token }}
+
+  - name: Download Changelog
+    uses: actions/download-artifact@v4
+    with:
+      name: changelog-artifact
+      path: .
+
+
+  - uses: ncipollo/release-action@main
+    with:
+      owner: ${{ github.repository_owner }}
+      repo: ${{ inputs.repository }}
+      tag: ${{ inputs.version }}
+      commit: ${{ github.sha }}
+      bodyFile: release.md
+      draft: false
+      prerelease: ${{ inputs.is_prerelease }}
+      skipIfReleaseExists: true
+      token: ${{ inputs.github_token }}

pkg/pr/src/error.rs

@@ -2,7 +2,9 @@ pub type Result<T> = std::result::Result<T, Error>;
 
 #[derive(Debug, PartialEq, thiserror::Error)]
 pub enum Error {
-    #[error("Invalid prefix (title {title:?}, emoji {emoji:?})")]
+    #[error(
+        "Invalid prefix (title: {title}, emoji: {emoji:#?}).\nValid prefixes are:\n:sparkles:\n:bug:\n:book:\n:seedling:\n:warning:\n:ghost:\n"
+    )]
     InvalidTitle {
         title: String,
         emoji: Option<String>,