GHA: disable build on every push. Attempt at generating download page

.github/workflows/gen-nighly-downloads.yml

@@ -0,0 +1,28 @@
+name: Wipe out temp build artifacts
+
+# configure manual trigger
+on:
+  workflow_dispatch:
+
+jobs:
+  cleanup:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Update Nightly Distro Downloads page
+        env:
+          AWS_ACCESS_KEY_ID: ${{ secrets.TOOLS_S3_ACCESS_KEY }}
+          AWS_SECRET_ACCESS_KEY: ${{ secrets.TOOLS_S3_SECRET_KEY  }}
+          AWS_DEFAULT_REGION: us-east-1
+        run: |
+          dist_path="snapshot/STS4/nightly/dist/e4.28"
+          downloads_html="sts4-nightly-e4.28.html"
+          files=`aws s3 ls s3://dist.springsource.com/${dist_path} --recursive --exclude "*" --include "spring-tool-suite-4*.zip" --include "spring-tool-suite-4*.dmg" --include "spring-tool-suite-4*.self-extracting.jar" --include "spring-tool-suite-4*.tar.gz" --exclude "*/*"`
+          echo '<ul>' >> $downloads_html
+          for file in $files
+          do
+            echo '  <li><a href="https://download.springsource.com/snapshot/STS4/nightly/dist/e4.28/'${file}'">${file}</li>' >> $downloads_html  
+          done
+          echo '</ul>' >> $downloads_html
+          cat ./$downloads_html
+
+

.github/workflows/snapshot-eclipse-ls-extensions-build.yml

@@ -4,12 +4,12 @@ concurrency:
   group: eclipse-ls-extension-snapshot
   cancel-in-progress: true
 
-#on:
-#  workflow_dispatch:
 on:
-  push:
-    branches:
-      - 'main'
+  workflow_dispatch:
+#on:
+#  push:
+#    branches:
+#      - 'main'
 
 jobs:
   eclipse-ls-extensions: