Guard uploads and release to main branch

.gitlab-ci.yml

@@ -28,7 +28,10 @@ build:
   script:
     - nix build -L ".#${ARCH}"
     - URL=$CI_API_V4_URL/projects/$CI_PROJECT_ID/packages/generic/sword-utils/$TAG/sword-${ARCH}-${TAG}.tar.xz
-    - 'curl -i --fail-with-body --header "JOB-TOKEN: $CI_JOB_TOKEN" --upload-file ./result/sword.tar.xz "${URL}"'
+    - >-
+      if [ "$CI_COMMIT_BRANCH" == "main" ]; then
+        'curl -i --fail-with-body --header "JOB-TOKEN: $CI_JOB_TOKEN" --upload-file ./sword.tar.xz "${URL}"'
+      fi
     - echo "${ARCH}_TARBALL=${URL}" > build.env
   artifacts:
     reports:
@@ -37,6 +40,9 @@ build:
 "Create release":
   stage: release
   image: registry.gitlab.com/gitlab-org/release-cli:latest
+  rules:
+    - if: $CI_COMMIT_BRANCH == "main"
+      when: always
   needs:
     - job: check
       artifacts: true