added drone/GiteaComposerPackage template

drone/GiteaComposerPackage.yml

@@ -0,0 +1,48 @@
+.GiteaComposerPackage: &GiteaComposerPackage
+  name: GiteaComposerPackage
+  image: composer:2
+  
+  environment:
+    VERSION_COMMIT_ENABLE: "true"
+    VERSION_REF_NORMALIZED_ENABLE: "true"
+  commands:
+    # drone does not support expanding vars in environment values, set defaults via bash
+    - if [[ -z "$COMPOSER_PACKAGE_DIR" ]]; then COMPOSER_PACKAGE_DIR=$DRONE_WORKSPACE_BASE; fi
+    - TEMP_DIR=$(mktemp -d)
+    - COMPOSER_PACKAGE_FILE=$TEMP_DIR/package.zip
+
+    # unset ".version" in composer.json as it interfers with setting version via GET param ?version=
+    - |
+      apk add --no-cache jq
+      jq 'del(.version)' $COMPOSER_PACKAGE_DIR/composer.json > $COMPOSER_PACKAGE_DIR/composer.json.tmp
+      mv $COMPOSER_PACKAGE_DIR/composer.json.tmp $COMPOSER_PACKAGE_DIR/composer.json
+
+    # create zip
+    - zip -r $COMPOSER_PACKAGE_FILE $COMPOSER_PACKAGE_DIR
+    
+    # prepare upload helper function
+    - |
+      function upload_composer_package() {
+        VERSION=$1
+        echo "# uploading package to $GITEA_PACKAGES_API/$CI_PROJECT_NAMESPACE/composer?version=$VERSION"
+        curl --user "$CI_REGISTRY_USER:$CI_REGISTRY_PASSWORD" \
+          --upload-file $COMPOSER_PACKAGE_FILE \
+          $GITEA_PACKAGES_API/$CI_PROJECT_NAMESPACE/composer?version=$VERSION
+      }
+
+    # add tag for reference if available using normalization
+    # - attempt to build tag first
+    # - attempt to build branch if not a PR (if not PR for extra security, variable description on drone unclear)
+    - |
+      if [[ "$VERSION_REF_NORMALIZED_ENABLE" == "true" ]] && [[ ! -z $DRONE_TAG ]]; then
+        REF_TAG_NORMALIZED=$(echo $DRONE_TAG | sed s:/:-:g | sed -e "s/^v//")
+        upload_composer_package "$REF_TAG_NORMALIZED"
+      elif [[ "$VERSION_REF_NORMALIZED_ENABLE" == "true" ]] && [[ -z "$DRONE_PULL_REQUEST" ]] && [[ ! -z $DRONE_BRANCH ]]; then
+        REF_TAG_NORMALIZED=$(echo $DRONE_BRANCH | sed s:/:-:g)
+        upload_composer_package "0.0.0-dev-$REF_TAG_NORMALIZED"
+
+        # version based on commit
+        if [[ "$VERSION_COMMIT_ENABLE" == "true" ]]; then
+          upload_composer_package "0.0.0-dev-$REF_TAG_NORMALIZED-commit-$CI_COMMIT_SHA"
+        fi
+      fi