From d4be89c487a60e6f8426c6465692727baebd1a05 Mon Sep 17 00:00:00 2001
From: Vanessa Freudenberg <vanessa@codefrau.net>
Date: Tue, 5 Mar 2024 18:58:48 -0800
Subject: [PATCH] Notify slack about build failures

---
 .github/workflows/deploy-to-pages.yml | 11 ++++++-----
 scripts/build-pages.sh                | 17 +++++++++++++++++
 2 files changed, 23 insertions(+), 5 deletions(-)

diff --git a/.github/workflows/deploy-to-pages.yml b/.github/workflows/deploy-to-pages.yml
index 8d996a75..e9326d56 100644
--- a/.github/workflows/deploy-to-pages.yml
+++ b/.github/workflows/deploy-to-pages.yml
@@ -1,7 +1,7 @@
-# Workflow to build a GitHub Pages site for multiple branches simultaneously
+# Workflow to build a GitHub Pages site for all examples and tutorials
+# and deploy it to https://croquet.github.io/worldcore/
 
-# NOTE: to make this work, in GitHub Settings under Pages – Build and Deployment
-# change Source from "Deploy from a branch" to "GitHub Actions"!
+# The actual work is done in scripts/build-pages.sh
 
 # NOTE: to make this work, in GitHub Settings under Pages – Build and Deployment
 # change Source from "Deploy from a branch" to "GitHub Actions"!
@@ -27,7 +27,8 @@ concurrency:
 
 jobs:
   deploy:
-    # only run on main repo
+    # only run on main repo and not forks
+    # (change this in your fork if you want it there)
     if: github.repository == 'croquet/worldcore'
     environment:
       name: github-pages
@@ -39,7 +40,7 @@ jobs:
         with:
           fetch-depth: 0          # fetch full history
 
-      - name: Setup Pages
+      - name: Configure pages
         uses: actions/configure-pages@v4
 
       - name: Use Node.js 18
diff --git a/scripts/build-pages.sh b/scripts/build-pages.sh
index ffe62eed..62800ae2 100755
--- a/scripts/build-pages.sh
+++ b/scripts/build-pages.sh
@@ -11,6 +11,7 @@ npx lerna bootstrap || exit 1
 rm -rf _site
 mkdir _site
 LINKS=()
+FAILED=()
 TOP=$(git rev-parse --show-toplevel)
 for DIR in tutorials examples ; do
     cd $TOP
@@ -36,6 +37,7 @@ for DIR in tutorials examples ; do
             cat build.log >> ../../_site/$APP/index.html
             echo "</pre>" >> ../../_site/$APP/index.html
             LINKS+=("<p>${DATE} <b>${APP} BUILD FAILED</b> (<a href=\"${APP}/build.log\">log</a>)</p>")
+            FAILED+=($APP)
         fi
         mv -v build.log ../../_site/$APP/
     done
@@ -75,3 +77,18 @@ cat > _site/index.html <<EOF
 </body>
 </html>
 EOF
+
+NUM_FAILED=${#FAILED[@]}
+if [ $NUM_FAILED -gt 0 ] ; then
+    if [ -n "$SLACK_HOOK_URL" ] ; then
+        echo
+        echo "=== Sending slack message ==="
+        URL="https://croquet.github.io/worldcore/"
+        APPS=$(printf -- "- %s\\\\n" "${FAILED[@]}")
+        JSON="{\"text\": \"🤖 *Worldcore build failed for ${NUM_FAILED} apps* 🤖\n${URL}\n${APPS}\""
+        echo curl -X POST -H 'Content-type: application/json' --data "${JSON}\"}" $SLACK_HOOK_URL
+    else
+        echo
+        echo "=== No SLACK_HOOK_URL set, not sending slack message ==="
+    fi
+fi