Build: Read rev-id from file.

heiher · Apr 20, 2024 · bd35100 · bd35100
1 parent 0c8b645
commit bd35100
Showing 1 changed file with 13 additions and 1 deletion.
diff --git a/build.mk b/build.mk
@@ -5,4 +5,16 @@ rwildcard=$(foreach d,$(wildcard $1*), \
           $(filter $(subst *,%,$2),$d))
 
 SRCFILES=$(call rwildcard,$(SRCDIR)/,*.c *.S)
-VERSION_CFLAGS=-DCOMMIT_ID=\"$(shell git -C $(SRCDIR) rev-parse --short HEAD)\"
+
+ifeq ($(REV_ID),)
+  ifneq (,$(wildcard .rev-id))
+    REV_ID=$(shell cat .rev-id)
+  endif
+  ifeq ($(REV_ID),)
+    REV_ID=$(shell git -C $(SRCDIR) rev-parse --short HEAD)
+  endif
+  ifeq ($(REV_ID),)
+    REV_ID=unknown
+  endif
+endif
+VERSION_CFLAGS=-DCOMMIT_ID=\"$(REV_ID)\"