.github/ actions: replace travis

.checkpatch.conf

@@ -0,0 +1,6 @@
+--codespell
+--codespellfile scripts/spelling.txt
+--ignore C99_COMMENT_TOLERANCE
+--no-tree
+--strict
+-g

.github/workflows/build.yml

@@ -0,0 +1,25 @@
+---
+# Basic build test
+
+name: build
+
+# yamllint disable-line rule:truthy
+on: [pull_request, push, workflow_dispatch]
+
+env:
+  CMAKE_C_FLAGS: "-Werror -Wall -Wmissing-prototypes\
+    -Wimplicit-fallthrough=3 -Wpointer-arith"
+
+jobs:
+  build-test:
+    runs-on: ubuntu-22.04
+    steps:
+      - uses: actions/checkout@v3
+        with: {fetch-depth: 50, submodules: recursive}
+
+      - name: install tools
+        run: sudo apt update && sudo apt install -y ninja-build
+
+      - name: build
+        run: cmake -B build/ -G Ninja
+      - run: cmake --build build/

.github/workflows/pull-request.yml

@@ -9,17 +9,34 @@
 # github.com also has a powerful web editor that can be used without
 # committing.
 
-name: checkpatch
+name: codestyle
 
 # yamllint disable-line rule:truthy
 on: [pull_request]
 
 jobs:
   yamllint:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     steps:
       - uses: actions/checkout@v2
-        with: {fetch-depth: 50, submodules: recursive}
+        with:
+          fetch-depth: 50
+          submodules: recursive
 
       - name: run yamllint
         run: yamllint .github/workflows/*.yml
+  checkpatch:
+    runs-on: ubuntu-22.04
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          ref: ${{ github.event.pull_request.head.sha }}
+          fetch-depth: ${{ env.PR_FETCH_DEPTH }}
+
+      - name: install codespell
+        run: sudo apt update && sudo apt install -y codespell
+
+      - name: checkpatch.pl PR review
+        uses: webispy/checkpatch-action@v9
+        env:
+          CHECKPATCH_COMMAND: ./scripts/checkpatch.pl