show target version, date, commit hash and branch (#221)

applications/irukagotchi/irukagotchi.c

@@ -20,10 +20,12 @@ void irukagotchi_draw_callback(CanvasApi* canvas, void* context) {
 
     canvas->clear(canvas);
     canvas->set_color(canvas, ColorBlack);
-    canvas->set_font(canvas, FontPrimary);
-    canvas->draw_icon(canvas, 0, 0, irukagotchi->icon);
-    canvas->draw_str(canvas, 80, 30, "111001");
-    canvas->draw_str(canvas, 80, 42, "011010");
+    canvas->draw_icon(canvas, 128 - 80, 0, irukagotchi->icon);
+    canvas->set_font(canvas, FontSecondary);
+    canvas->draw_str(canvas, 2, 10, TARGET " " BUILD_DATE);
+    canvas->draw_str(canvas, 2, 22, GIT_BRANCH);
+    canvas->draw_str(canvas, 2, 34, GIT_BRANCH_NUM);
+    canvas->draw_str(canvas, 2, 46, GIT_COMMIT);
 }
 
 void irukagotchi_input_callback(InputEvent* event, void* context) {

bootloader/Makefile

@@ -12,5 +12,6 @@ TARGET			?= f2
 TARGET_DIR		= targets/$(TARGET)
 include			$(TARGET_DIR)/target.mk
 
+include			$(PROJECT_ROOT)/make/git.mk
 include			$(PROJECT_ROOT)/make/toolchain.mk
 include			$(PROJECT_ROOT)/make/rules.mk

firmware/Makefile

@@ -14,5 +14,6 @@ TARGET			?= f2
 TARGET_DIR		= targets/$(TARGET)
 include			$(TARGET_DIR)/target.mk
 
+include			$(PROJECT_ROOT)/make/git.mk
 include			$(PROJECT_ROOT)/make/toolchain.mk
 include			$(PROJECT_ROOT)/make/rules.mk

make/git.mk

@@ -0,0 +1,7 @@
+GIT_COMMIT		= $(shell git describe --always  --exclude '*' || echo 'unknown')
+GIT_BRANCH		= $(shell git rev-parse --abbrev-ref HEAD || echo 'unknown')
+GIT_BRANCH_NUM	= $(shell git rev-list --count $(GIT_BRANCH) || echo 'nan')
+BUILD_DATE		= $(shell date '+%d-%m-%Y' || echo 'unknown')
+
+CFLAGS			+= -DGIT_COMMIT="\"$(GIT_COMMIT)\"" -DGIT_BRANCH="\"$(GIT_BRANCH)\"" -DGIT_BRANCH_NUM="\"$(GIT_BRANCH_NUM)\""
+CFLAGS			+= -DBUILD_DATE="\"$(BUILD_DATE)\"" -DTARGET="\"$(TARGET)\""