Restrict workflows to subfolders.

Only run code checks when code/ is touched; latex when talk/ is touched.

Author: hageboeck

.github/workflows/build-exercises.yml

@@ -1,5 +1,12 @@
 name: Build exercises
-on: [ push, pull_request ]
+on:
+  push:
+    paths:
+      - 'code/**'
+  pull_request:
+    paths:
+      - 'code/**'
+      - '.github/workflows/**'
 
 # Cancel running jobs on force-push
 concurrency:

.github/workflows/build-slides.yml

@@ -1,5 +1,12 @@
 name: Build LaTeX slides
-on: [push,pull_request]
+on:
+  push:
+    paths:
+      - 'talk/**'
+  pull_request:
+    paths:
+      - 'talk/**'
+      - '.github/workflows/**'
 
 # Cancel running jobs on force-push
 concurrency:

.github/workflows/publish-slides.yml

@@ -1,6 +1,8 @@
 name: Publish LaTeX slides
 on:
   push:
+    paths:
+      - 'talk/**'
     branches:
       - master