Merge branch 'trunk' into DurvalMenezes-undef_USE_MANUAL_MEMORY_fix

* trunk:
  removed test branch from action triggers (the action works and seems ready to merge)
  test: is apt-get any faster than apt?
  github actions: cache the Atmel DFP files between runs
  fixed intentional error, because CI build-fail test worked correctly
  help CI detect build failures
  initial test to fix branch names and see if actions work
  make clean: don't remove files in arch/dfp/
  docs: added info on contributing, fixed minor formatting issues
  basic compile workflow publishing artifacts to test

1 files changed, 49 insertions, 0 deletions

diff --git a/.github/workflows/compile.yml b/.github/workflows/compile.yml
new file mode 100644
index 0000000..fabcf31
--- /dev/null
+++ b/.github/workflows/compile.yml
@@ -0,0 +1,49 @@
+name: build all
+
+on:
+  push:
+    branches: [ "trunk" ]
+  pull_request:
+    branches: [ "trunk" ]
+
+jobs:
+  compile:
+    runs-on: ubuntu-latest
+
+    steps:
+
+    - name: Checkout
+      uses: actions/checkout@master
+
+    - name: Requirements
+      run: |
+        sudo apt-get -qqy update
+        sudo apt-get -qqy install avr-libc binutils-avr gcc-avr unzip wget
+
+    - name: Cache Atmel DFPs
+      id: cache-dfp
+      uses: actions/cache@v3
+      env:
+        cache-name: cache-dfp-files
+      with:
+        path: arch/dfp
+        # new cache whenever the dfp-install script changes
+        key: ${{ runner.os }}-${{ env.cache-name }}-${{ hashFiles('bin/dfp-install.sh') }}
+
+    - name: Install Atmel DFPs
+      if: steps.cache-dfp.outputs.cache-hit != 'true'
+      run: |
+        ./make dfp
+
+    - name: Compile All
+      run: |
+        ./make
+        echo "ARTIFACT_NAME=${GITHUB_WORKFLOW}-${GITHUB_REF_NAME}-$(git rev-parse --short ${GITHUB_SHA})-${GITHUB_RUN_NUMBER}" >> "${GITHUB_ENV}"
+
+    - name: Store Artifacts
+      uses: actions/upload-artifact@v3
+      with:
+        name: ${{ env.ARTIFACT_NAME }}
+        if-no-files-found: error
+        path: |
+          hex/*.hex