From 438a173a61e0b6b62a5dbdda881e9c920df17165 Mon Sep 17 00:00:00 2001
From: Holger Schemel <info@artsoft.org>
Date: Sat, 19 Sep 2020 03:05:28 +0200
Subject: [PATCH] added showing commit hash on version page of info screen

---
 .gitignore    |  1 +
 Makefile      |  3 +++
 src/Makefile  | 15 ++++++++++++++-
 src/config.c  |  6 ++++++
 src/config.h  |  1 +
 src/screens.c |  4 ++++
 6 files changed, 29 insertions(+), 1 deletion(-)

diff --git a/.gitignore b/.gitignore
index e884cfc1..f0268317 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,6 +5,7 @@
 
 # ignore automatically generated files
 src/conftime.h
+src/confhash.h
 src/conf_gfx.h
 src/conf_snd.h
 src/conf_mus.h
diff --git a/Makefile b/Makefile
index 15e686a6..3e5877f0 100644
--- a/Makefile
+++ b/Makefile
@@ -102,6 +102,9 @@ auto-conf:
 conf-time:
 	@$(MAKE_CMD) conf-time
 
+conf-hash:
+	@$(MAKE_CMD) conf-hash
+
 run: all
 	@$(MAKE_CMD) run
 
diff --git a/src/Makefile b/src/Makefile
index 8f18fa76..0c8a9acd 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -192,6 +192,12 @@ SOURCE_DATE_EPOCH ?= $(shell test -d ../.git && test `git ls-files -m | wc -l` -
 # get source date string from either GNU / Linux or BSD / Mac OS X style "date"
 SOURCE_DATE_STRING := $(shell date -u -d "@$(SOURCE_DATE_EPOCH)" "+$(TIMESTAMP_FORMAT)"  2>/dev/null || date -u -r "$(SOURCE_DATE_EPOCH)" "+$(TIMESTAMP_FORMAT)" 2>/dev/null || date -u "+$(TIMESTAMP_FORMAT)")
 
+COMMIT_HASH_FILE = confhash.h
+COMMIT_HASH_NONE = "[changed files]"
+
+# get last Git commit hash, if no files were changed
+SOURCE_HASH_STRING ?= $(shell test -d ../.git && test `git ls-files -m | wc -l` -eq 0 && git show -s --format=%h || echo "$(COMMIT_HASH_NONE)")
+
 LIBGAME_DIR = libgame
 LIBGAME = $(LIBGAME_DIR)/libgame.a
 
@@ -224,7 +230,7 @@ GRAPHICS_DIR = ../graphics
 
 all: $(AUTOCONF) libgame_dir game_em_dir game_sp_dir game_mm_dir $(PROGNAME) graphics_dir
 
-$(PROGNAME): $(RNDLIBS) $(TIMESTAMP_FILE) $(OBJS) $(ICON)
+$(PROGNAME): $(RNDLIBS) $(TIMESTAMP_FILE) $(COMMIT_HASH_FILE) $(OBJS) $(ICON)
 	$(CC) $(PROFILING) $(OBJS) $(ICON) $(RNDLIBS) $(LDFLAGS) -o $(PROGNAME)
 ifdef BUILD_DIST
 	strip $(PROGNAME)
@@ -275,9 +281,16 @@ conf-time:
 	@echo '#define SOURCE_DATE_STRING "$(SOURCE_DATE_STRING)"' \
 	> $(TIMESTAMP_FILE)
 
+conf-hash:
+	@echo '#define SOURCE_HASH_STRING "$(SOURCE_HASH_STRING)"' \
+	> $(COMMIT_HASH_FILE)
+
 $(TIMESTAMP_FILE): $(SRCS) $(RNDLIBS)
 	@$(MAKE) conf-time
 
+$(COMMIT_HASH_FILE): $(SRCS) $(RNDLIBS)
+	@$(MAKE) conf-hash
+
 $(ICON):
 #	$(CONVERT) $(ICON32X32) $(CONVERT_ICON_ARGS) $(ICONBASE).ico
 	$(CONVERT) $(ICON_PATH)/*.png $(CONVERT_ICON_ARGS) $(ICONBASE).ico
diff --git a/src/config.c b/src/config.c
index 8f3bd084..d50ba684 100644
--- a/src/config.c
+++ b/src/config.c
@@ -13,6 +13,7 @@
 
 #include "config.h"
 #include "conftime.h"
+#include "confhash.h"
 
 
 char *getSourceDateString(void)
@@ -20,6 +21,11 @@ char *getSourceDateString(void)
   return SOURCE_DATE_STRING;
 }
 
+char *getSourceHashString(void)
+{
+  return SOURCE_HASH_STRING;
+}
+
 char *getProgramTitleString(void)
 {
   return program.program_title;
diff --git a/src/config.h b/src/config.h
index 4b1a0e71..06ae39e6 100644
--- a/src/config.h
+++ b/src/config.h
@@ -15,6 +15,7 @@
 #include "main.h"
 
 char *getSourceDateString(void);
+char *getSourceHashString(void);
 char *getProgramTitleString(void);
 char *getProgramRealVersionString(void);
 char *getProgramVersionString(void);
diff --git a/src/screens.c b/src/screens.c
index 41292512..6838dc95 100644
--- a/src/screens.c
+++ b/src/screens.c
@@ -3692,6 +3692,10 @@ static void DrawInfoScreen_Version(void)
 
   DrawTextF(xstart1, ystart, font_head, "Source date");
   DrawTextF(xstart2, ystart, font_text, getSourceDateString());
+  ystart += ystep_line;
+
+  DrawTextF(xstart1, ystart, font_head, "Commit hash");
+  DrawTextF(xstart2, ystart, font_text, getSourceHashString());
   ystart += ystep_para;
 
   DrawTextF(xstart1, ystart, font_head, "Library");
-- 
2.34.1