ci: [#450] support pre-release versions in workflow branch version extraction

Author: josecelano

.github/workflows/container.yaml

@@ -10,7 +10,7 @@
 #
 # Publishing:
 #   - Images are pushed to Docker Hub on push to main/develop/release branches (not PRs)
-#   - Release branches (releases/vX.Y.Z) publish versioned Docker tags (X.Y.Z)
+#   - Release branches (releases/vX.Y.Z or releases/vX.Y.Z-pre.N) publish versioned Docker tags
 #   - Release Docker tags use bare semver without the v prefix
 #   - Requires Docker Hub credentials in the dockerhub-torrust GitHub Environment
 
@@ -111,7 +111,7 @@ jobs:
               elif [[ "${{ github.ref }}" == "refs/heads/develop" ]]; then
                 echo "type=develop" >> $GITHUB_OUTPUT
                 echo "continue=true" >> $GITHUB_OUTPUT
-              elif [[ $(echo "${{ github.ref }}" | grep -P '^refs/heads/releases/v(0|[1-9]\d*)\.(0|[1-9]\d*)\.(0|[1-9]\d*)$') ]]; then
+              elif [[ $(echo "${{ github.ref }}" | grep -P '^refs/heads/releases/v(0|[1-9]\d*)\.(0|[1-9]\d*)\.(0|[1-9]\d*)(-[a-zA-Z0-9][a-zA-Z0-9.-]*)?$') ]]; then
                 version=$(echo "${{ github.ref }}" | sed -n -E 's/^refs\/heads\/releases\///p')
                 echo "version=$version" >> $GITHUB_OUTPUT
                 echo "type=release" >> $GITHUB_OUTPUT

.github/workflows/publish-crate.yaml

@@ -1,7 +1,7 @@
 # Crate publication workflow for Torrust Tracker Deployer SDK
 #
 # This workflow publishes the SDK crate when a release branch is pushed.
-# Trigger branch format: releases/vX.Y.Z
+# Trigger branch format: releases/vX.Y.Z or releases/vX.Y.Z-pre.N (pre-release)
 
 name: Publish Crate
 
@@ -37,12 +37,12 @@ jobs:
       - name: Extract Release Version
         id: release
         run: |
-          if [[ "${{ github.ref_name }}" =~ ^releases/v(0|[1-9][0-9]*)\.(0|[1-9][0-9]*)\.(0|[1-9][0-9]*)$ ]]; then
+          if [[ "${{ github.ref_name }}" =~ ^releases/v(0|[1-9][0-9]*)\.(0|[1-9][0-9]*)\.(0|[1-9][0-9]*)(-[a-zA-Z0-9][a-zA-Z0-9.-]*)?$ ]]; then
             version="${GITHUB_REF_NAME#releases/v}"
             echo "version=$version" >> "$GITHUB_OUTPUT"
           else
             echo "Invalid release branch name: ${{ github.ref_name }}" >&2
-            echo "Expected format: releases/vX.Y.Z" >&2
+            echo "Expected format: releases/vX.Y.Z or releases/vX.Y.Z-pre.N" >&2
             exit 1
           fi