Move snapshot generation to different workflow

Only run snapshot generation on push events to master.

.github/workflows/ci-push.yml

@@ -619,41 +619,3 @@ jobs:
       with:
         name: scanbuild-cs-${{ github.sha }}
         path: racketcs-report-${{ github.sha }}.tar.bz2
-
-  create-installer:
-    runs-on: ubuntu-18.04
-
-    steps:
-    - uses: actions/checkout@v1
-    - run: |
-        git checkout -b github_actions_build_branch___ # have to be on a branch
-
-    - name: Install pkg dependencies
-      run: |
-        sudo apt update
-        sudo apt install -y libffi-dev unzip python libxml2-dev libfindbin-libs-perl make gcc g++ git uuid-dev
-    - uses: Bogdanp/setup-racket@v0.7
-      with:
-          architecture: 'x64'
-          distribution: 'full'
-          variant: 'regular'
-          version: 'current'
-
-    - name: Install s3-sync
-      run: |
-        sudo raco pkg install -i --auto s3-sync
-
-    - name: Building
-      env:
-        DISTRO_BUILD_SITE_DEST: "${{ runner.temp }}/site-dest/"
-      run: |
-        export cpus=$(grep -c ^processor /proc/cpuinfo)
-        make snapshot-site PLAIN_RACKET=/usr/bin/racket CONFIG=".github/workflows/site-small.rkt" -j $((cpus+1))
-
-    - name: S3 Sync
-      env:
-        AWS_ACCESS_KEY_ID: ${{ secrets.AWSAccessKeyID }}
-        AWS_SECRET_ACCESS_KEY: ${{ secrets.AWSSecretKey }}
-      run: |
-        ls -l ${{ runner.temp }}/site-dest/ci-snapshots/
-        raco s3-sync --acl public-read --web --redirect-links ${{ runner.temp }}/site-dest/ci-snapshots/ s3://snapshot.racket-lang.org/ci-snapshots/

.github/workflows/ci-snapshot.yml

@@ -0,0 +1,45 @@
+name: Snapshot Generation
+
+on:
+  push:
+    branches:
+      - master
+
+jobs:
+  create-installer:
+    runs-on: ubuntu-18.04
+
+    steps:
+    - uses: actions/checkout@v1
+    - run: |
+        git checkout -b github_actions_build_branch___ # have to be on a branch
+
+    - name: Install pkg dependencies
+      run: |
+        sudo apt update
+        sudo apt install -y libffi-dev unzip python libxml2-dev libfindbin-libs-perl make gcc g++ git uuid-dev
+    - uses: Bogdanp/setup-racket@v0.7
+      with:
+          architecture: 'x64'
+          distribution: 'full'
+          variant: 'regular'
+          version: 'current'
+
+    - name: Install s3-sync
+      run: |
+        sudo raco pkg install -i --auto s3-sync
+
+    - name: Building
+      env:
+        DISTRO_BUILD_SITE_DEST: "${{ runner.temp }}/site-dest/"
+      run: |
+        export cpus=$(grep -c ^processor /proc/cpuinfo)
+        make snapshot-site PLAIN_RACKET=/usr/bin/racket CONFIG=".github/workflows/site-small.rkt" -j $((cpus+1))
+
+    - name: S3 Sync
+      env:
+        AWS_ACCESS_KEY_ID: ${{ secrets.AWSAccessKeyID }}
+        AWS_SECRET_ACCESS_KEY: ${{ secrets.AWSSecretKey }}
+      run: |
+        ls -l ${{ runner.temp }}/site-dest/ci-snapshots/
+        raco s3-sync --acl public-read --web --redirect-links ${{ runner.temp }}/site-dest/ci-snapshots/ s3://snapshot.racket-lang.org/ci-snapshots/