Create auto-updater

.gitlab-ci.yml

@@ -1,10 +1,63 @@
 stages:
   - check
+  - update
   - build
   - release
 
+version_update:
+  stage: update
+  tags:
+    - nix
+  rules:
+    - if: '$CI_PIPELINE_SOURCE == "manual"'
+  artifacts:
+    reports:
+      dotenv: update.env
+  script:
+    - nix run ".#update" > update.env
+    - |-
+      if git diff --quiet; then
+        echo "Found changes to make"
+        git checkout -b "sword-rev/$CI_PIPELINE_IID"
+        echo "BRANCH=sword-rev/$CI_PIPELINE_IID" >> update.env
+        git stage .
+        git commit -m "Automatic update #$CI_PIPELINE_IID"
+        git push "https://${GITLAB_USER_LOGIN}:${CI_GIT_TOKEN}@${CI_REPOSITORY_URL#*@}" HEAD
+      fi
+
+create_pr:
+  stage: update
+  needs:
+    - version_update
+  dependencies:
+    - version_update
+  variables:
+    GIT_STRATEGY: none
+    GITLAB_PRIVATE_TOKEN: $CI_GIT_TOKEN
+  rules:
+    - if: '$CI_PIPELINE_SOURCE == "manual"'
+  script:
+    - test -z ${DO_UPDATE} && { echo "No updates required. Not crating PR"; exit 0; }
+    - >-
+      CREATE_MR=$(gitlab project-merge-request create
+      --remove-source-branch true
+      --project-id ${CI_PROJECT_ID}
+      --source-branch "${BRANCfh}"
+      --target-branch "main"
+      --title "Update sword to r$NEW_REV")
+    - IID=${CREATE_MR#* }
+    - >-
+      gitlab project-merge-request merge \
+      --project-id ${CI_PROJECT_ID} \
+      --iid ${IID} \
+      --merge-when-pipeline-succeeds true
+    - echo "PR set to auto-merge if build succeeds"
+
 check:
   stage: check
+  rules:
+    - if: '$CI_PIPELINE_SOURCE == "manual"'
+      when: never
   tags:
     - nix
   script:
@@ -25,6 +78,9 @@ build:
       - ARCH: [x86, ucrt]
   tags:
     - nix
+  rules:
+    - if: '$CI_PIPELINE_SOURCE == "manual"'
+      when: never
   script:
     - nix run -L ".#${ARCH}"
     - ls -l
@@ -46,6 +102,8 @@ build:
   rules:
     - if: $CI_COMMIT_BRANCH == "main"
       when: always
+    - if: '$CI_PIPELINE_SOURCE == "manual"'
+      when: never
   needs:
     - job: check
       artifacts: true