Add synopsis and generate usage print from README

.gitignore

@@ -43,3 +43,6 @@
 
 # ilclient
 /libs
+
+# generated header
+help.h

Makefile

@@ -9,8 +9,16 @@ CFLAGS+=-DVERSION=${BUILDVERSION} -DLCURL_NAME=$(LIBCURL_NAME)
 
 include Makefile.include
 
-$(BIN): $(OBJS)
+$(BIN): help.h $(OBJS)
 	$(CC) -o $@ $(OBJS) $(LDFLAGS)
+
+clean:: 
+	@rm -f help.h
+
+help.h: README.md
+	echo -n "static void printUsage(){printf(\"" > help.h
+	sed -n -e '/\#\# Synopsis/,/\#\# / p' README.md | sed -e '1d;$$d' | sed ':a;N;$$!ba;s/\n/\\n/g' | tr '\n' ' ' >> help.h
+	echo "\\\\n\");}" >> help.h
 
 ilclient:
 	mkdir -p libs

Makefile.include

@@ -14,7 +14,7 @@ all: $(BIN) $(LIB)
 %.a: $(OBJS)
 	$(AR) r $@ $^
 
-clean:
+clean::
 	for i in $(OBJS); do (if test -e "$$i"; then ( rm $$i ); fi ); done
 	@rm -f $(BIN) $(LIB)
 

README.md

@@ -14,6 +14,46 @@ And install with:
 
     sudo make install
 
+## Synopsis
+
+USAGE: 
+
+    omxiv [OPTIONS] image1 [image2] ...
+    omxiv [OPTIONS] directory
+
+    Without any input it will cycle through all
+    supported images in the current directory.
+
+OPTIONS:
+
+    -h  --help                   Print this help
+    -v  --version                Show version info
+    -t                  n        Time in s between 2 images in a slide show
+    -b  --blank                  Set background to black
+    -T  --transition   type      type: none(default), blend
+        --duration      n        Transition duration in ms
+        --win     'x1 y1 x2 y2'  Position of image window
+        --win      x1,y1,x2,y2   Position of image window
+    -m  --mirror                 Mirror image
+    -a  --aspect       type      type: letterbox(default), fill, center
+    -o  --orientation   n        Orientation of the image (0, 90, 180, 270)
+    -l  --layer         n        Render layer number
+    -d  --display       n        Display number
+    -i  --info                   Print some additional infos
+    -k  --no-keys                Disable keyboard input
+    -s  --soft                   Force software decoding
+        --ignore-exif            Ignore exif orientation
+
+KEY CONFIGURATION:
+
+    ESC, q  :   Quit
+    LEFT    :   Previous image
+    RIGHT   :   Next image
+    UP      :   Rotate right
+    DOWN    :   Rotate left
+    m       :   Mirror image
+    p       :   Pause slide show
+
 ## Supported images
 
 * **JPEGs**

omxiv.c

@@ -15,6 +15,7 @@
 #include "omx_image.h"
 #include "soft_image.h"
 #include "bcm_host.h"
+#include "help.h"
 
 #ifndef VERSION
 #define VERSION "UNKNOWN"
@@ -133,42 +134,6 @@ static int getImageFilesInDir(char ***list, const char* path){
 	return imageNum;
 }
 
-
-void printUsage(const char *progr){
-	printf("\n");
-	printf("USAGE: %s [OPTIONS] image1 [image2] ...\n", progr);
-	printf("       %s [OPTIONS] directory\n\n", progr);
-	printf("    Without any input it will cycle through all\n");
-	printf("    supported images in the current directory.\n\n");
-	printf("OPTIONS:\n\n");
-	printf("    -h  --help                   Print this help\n");
-	printf("    -v  --version                Show version info\n");
-	printf("    -t                  n        Time in s between 2 images in a slide show\n");
-	printf("    -b  --blank                  Set background to black\n");
-	printf("    -T  --transition   type      type: none(default), blend\n");
-	printf("        --duration      n        Transition duration in ms\n");
-	printf("        --win     'x1 y1 x2 y2'  Position of image window\n");
-	printf("        --win      x1,y1,x2,y2   Position of image window\n");
-	printf("    -m  --mirror                 Mirror image\n");
-	printf("    -a  --aspect       type      type: letterbox(default), fill, center\n");
-	printf("    -o  --orientation   n        Orientation of the image (0, 90, 180, 270)\n");
-	printf("    -l  --layer         n        Render layer number\n");
-	printf("    -d  --display       n        Display number\n");
-	printf("    -i  --info                   Print some additional infos\n");
-	printf("    -k  --no-keys                Disable keyboard input\n");
-	printf("    -s  --soft                   Force software decoding\n");
-	printf("        --ignore-exif            Ignore exif orientation\n\n");
-	printf("KEY CONFIGURATION:\n\n");
-	printf("    ESC, q  :   Quit\n");
-	printf("    LEFT    :   Previous image\n");
-	printf("    RIGHT   :   Next image\n");
-	printf("    UP      :   Rotate right\n");
-	printf("    DOWN    :   Rotate left\n");
-	printf("    m       :   Mirror image\n");
-	printf("    p       :   Pause slide show\n");
-	printf("\n");
-}
-
 // http://stackoverflow.com/a/912796
 static char getch(const int timeout) {
 	char buf = 0;
@@ -417,7 +382,7 @@ int main(int argc, char *argv[]){
 
 		switch(opt){
 			case 'h':
-				printUsage(argv[0]);
+				printUsage();
 				return 0;
 			case 'v':
 				printVersion();