add format check

.github/workflows/main.yml

@@ -3,6 +3,16 @@ name: ESP-IDF
 on: [push, pull_request]
 
 jobs:
+  format-check:
+    runs-on: ubuntu-latest
+    container:
+      image: "espressif/idf:release-v5.2"
+    steps:
+      - uses: actions/checkout@v4
+      - run: apt update
+      - run: apt install clang-format
+      - run: make format-check
+
   build:
     runs-on: ubuntu-latest
     strategy:
@@ -11,6 +21,7 @@ jobs:
         version:
           - release-v4.4
           - release-v5.1
+          - release-v5.2
         example:
           - calibration_helper
           - demo

Makefile

@@ -8,6 +8,13 @@ EXPORTED_MODES ?= 1,2,5,16,17
 # Generate waveforms in room temperature range
 EXPORT_TEMPERATURE_RANGE ?= 15,35
 
+FORMATTED_FILES := $(shell find ./ -regex '.*\.\(c\|cpp\|h\|ino\)$$' \
+		-not -regex '.*/\(.ccls-cache\|.cache\|waveforms\|\components\|build\)/.*' \
+		-not -regex '.*/img_.*.h' \
+		-not -regex '.*/build.*' \
+		-not -regex '.*/\(firasans_.*.h\|opensans.*.h\|amiri.h\|alexandria.h\|dragon.h\)' \
+		-not -regex '.*E[DS][0-9]*[A-Za-z]*[0-9].h')
+
 # the default headers that should come with the distribution
 default: \
 	$(patsubst %,src/waveforms/epdiy_%.h,$(SUPPORTRED_DISPLAYS))
@@ -17,12 +24,11 @@ clean:
 	rm src/waveforms/eink_*.h
 
 format: 
-	clang-format --style=file -i $(shell find ./ -regex '.*\.\(c\|cpp\|h\|ino\)$$' \
-		-not -regex '.*/\(.ccls-cache\|.cache\|waveforms\|\components\|build\)/.*' \
-		-not -regex '.*/img_.*.h' \
-		-not -regex '.*/build.*' \
-		-not -regex '.*/\(firasans_.*.h\|opensans.*.h\|amiri.h\|alexandria.h\|dragon.h\)' \
-		-not -regex '.*E[DS][0-9]*[A-Za-z]*[0-9].h')
+	clang-format --style=file -i $(FORMATTED_FILES)
+
+format-check:
+	clang-format --style=file --dry-run -Werror $(FORMATTED_FILES)
+
 
 src/waveforms/epdiy_%.h: src/waveforms/epdiy_%.json
 	python3 scripts/waveform_hdrgen.py \