ci: cleanup build job, follow old release naming

.gitea/workflows/build.yml

@@ -73,6 +73,14 @@ jobs:
     runs-on: ubuntu-latest
     needs: build
     steps:
+      - name: Checkout codebase
+        uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+      - name: Setup vars
+        id: vars
+        run: |
+          echo "::set-output name=git_tag::$(git describe --tags --always)"
       - name: prepare archive
         run: |
           mkdir -p dist prepare
@@ -81,26 +89,8 @@ jobs:
         with:
           path: prepare
           pattern: um-*
-      - name: prepare archive
-        run: |
-          for exe in prepare/*/um-*.exe; do
-            zip -9 -j "dist/$(basename "$exe" .exe).zip" "$exe"
-            rm -f "$exe"
-          done
-          for exe in prepare/*/um-*; do
-            tar \
-              --sort=name --format=posix \
-              --pax-option=exthdr.name=%d/PaxHeaders/%f \
-              --pax-option=delete=atime,delete=ctime \
-              --clamp-mtime --mtime='1970-01-01T00:00:00Z' \
-              --numeric-owner --owner=0 --group=0 \
-              --mode=0755 \
-              -cv \
-              -C "$(dirname "$exe")" \
-              "$(basename "$exe")" \
-            | gzip -9 > "dist/$(basename "$exe").tar.gz"
-            rm -f "$exe"
-          done
+      - name: repack archive
+        run: ./misc/repack.sh "${{ steps.vars.outputs.git_tag }}"
       - name: Publish all-in-one archive
         uses: christopherhx/gitea-upload-artifact@v4
         with: