echo the sha in the output

.forgejo/workflows/integration.yml

@@ -10,6 +10,7 @@ jobs:
           ./forgejo.sh setup root admin1234 codeberg.org/forgejo/forgejo:1.19
           ./forgejo-runner.sh setup
           export FORGEJO_RUNNER_LOGS=forgejo-runner.log
-          ./forgejo-test-helper.sh run_workflow testdata/demo http://root:admin1234@$(cat forgejo-ip):3000 root demo setup-forgejo
+          ./forgejo-test-helper.sh run_workflow testdata/demo http://root:admin1234@$(cat forgejo-ip):3000 root demo setup-forgejo > /tmp/output
+          grep '^sha=' /tmp/output
           ./forgejo-test-helper.sh push_self_action http://root:admin1234@$(cat forgejo-ip):3000 root setup-forgejo vTest
           ./forgejo-test-helper.sh run_workflow testdata/sanity-checks http://root:admin1234@$(cat forgejo-ip):3000 root sanity-check setup-forgejo

action.yml

@@ -18,7 +18,8 @@ description: |
     `testrepo/.forgejo/workflows/*.yml` are replaced with `$forgejo/root/myaction`.
   * `forgejo-test-helper.sh push testrepo $forgejo root testrepo`
     Create the repository `$forgejo/root/testrepo` and populate it with the
-    content of the `testrepo` directory.
+    content of the `testrepo` directory. The SHA of the tip of the repository
+    is in the output, starting with `sha=`.
 
   The combination of `push_self_action` and `run_workflow` allows to
   run Forgejo Actions workflows from `testrepo` that use the action

forgejo-test-helper.sh

@@ -63,7 +63,9 @@ function push() {
 	git commit -m 'initial commit'
 	git remote add origin $url/$owner/$project
 	git push --force -u origin main
-	git rev-parse HEAD > SHA
+	sha=$(git rev-parse HEAD)
+	echo $sha > SHA
+	echo sha=$sha
     )
 }