Avoid unnecessary terraform plans for closed (unmerged) PRs (#2294)

* Avoid unnecessary terraform plans for closed (unmerged) PRs

* fix: also update templates copied to avoid Windows symlink problems.

---------

Co-authored-by: Ludovico Magnocavallo <ludomagno@google.com>

fast/assets/templates/workflow-github.yaml

@@ -34,6 +34,12 @@ env:
 
 jobs:
   fast-pr:
+    # Skip PRs which are closed without being merged.
+    if: >-
+      github.event.action == 'closed' && 
+      github.event.pull_request.merged == true ||
+      github.event.action == 'opened' ||
+      github.event.action == 'synchronize'
     permissions:
       contents: read
       id-token: write

fast/stages/0-bootstrap/templates/workflow-github.yaml

@@ -34,6 +34,12 @@ env:
 
 jobs:
   fast-pr:
+    # Skip PRs which are closed without being merged.
+    if: >-
+      github.event.action == 'closed' && 
+      github.event.pull_request.merged == true ||
+      github.event.action == 'opened' ||
+      github.event.action == 'synchronize'  
     permissions:
       contents: read
       id-token: write

fast/stages/1-resman/templates/workflow-github.yaml

@@ -34,6 +34,12 @@ env:
 
 jobs:
   fast-pr:
+    # Skip PRs which are closed without being merged.
+    if: >-
+      github.event.action == 'closed' && 
+      github.event.pull_request.merged == true ||
+      github.event.action == 'opened' ||
+      github.event.action == 'synchronize'
     permissions:
       contents: read
       id-token: write

fast/stages/1-tenant-factory/templates/workflow-github.yaml

@@ -34,6 +34,12 @@ env:
 
 jobs:
   fast-pr:
+    # Skip PRs which are closed without being merged.
+    if: >-
+      github.event.action == 'closed' && 
+      github.event.pull_request.merged == true ||
+      github.event.action == 'opened' ||
+      github.event.action == 'synchronize'  
     permissions:
       contents: read
       id-token: write