Improve automatic documentation generation

This removes the need to edit the copyright year before generating
  the documentation (every year, in several files) and adds some
  technical information (doxygen generation date, doxygen version,
  and FLTK Git revision) in both HTML and PDF docs.

- auto-generate copyright year (current year) used in several places
- include FLTK Git revision in HTML and PDF docs
- include generation date and doxygen version
- replace special html footer which didn't work well with default footer

1 files changed, 30 insertions, 9 deletions

diff --git a/documentation/Makefile b/documentation/Makefile
index 8fc0ca77c..3ecd63700 100644
--- a/documentation/Makefile
+++ b/documentation/Makefile
@@ -1,7 +1,7 @@
 #
 # Makefile for the Fast Light Tool Kit (FLTK) documentation.
 #
-# Copyright 1998-2020 by Bill Spitzak and others.
+# Copyright 1998-2022 by Bill Spitzak and others.
 #
 # This library is free software. Distribution and use rights are outlined in
 # the file "COPYING" which should have been included with this file.  If this
@@ -67,6 +67,7 @@ dist:	docs
 
 clean:
 	$(RM) Doxyfile Doxybook
+	$(RM) copyright.dox generated.dox
 	$(RM) fltk.pdf refman.pdf src/fltk-book.tex src/fltk-book.tex.in
 	$(RMDIR) html latex
 	$(RM) *~ *.bck *.bak *.log
@@ -131,24 +132,26 @@ uninstall-linux uninstall-osx:
 # Both files are generated from the common source file Doxyfile.in.
 # Note that Doxyfile.in is shared with CMake to configure these files.
 
-Doxyfile: Doxyfile.in
+Doxyfile: Doxyfile.in generated.dox copyright.dox
 	echo "Generating Doxyfile ..."
 	sed -e's,@FLTK_VERSION@,$(FLTK_VERSION),' \
 	    -e's,@GENERATE_HTML@,YES,' \
 	    -e's,@GENERATE_LATEX@,NO,' \
 	    -e's, @LATEX_HEADER@,,' \
-	    -e's,@CMAKE_CURRENT_SOURCE_DIR@/,,' \
-	    -e's,@FLTK_SOURCE_DIR@/,../,' \
+	    -e's,@CMAKE_CURRENT_SOURCE_DIR@,.,' \
+	    -e's,@CMAKE_CURRENT_BINARY_DIR@,,' \
+	    -e's,@FLTK_SOURCE_DIR@,..,' \
 	    < $< > $@
 
-Doxybook: Doxyfile.in
+Doxybook: Doxyfile.in generated.dox copyright.dox
 	echo "Generating Doxybook ..."
 	sed -e's,@FLTK_VERSION@,$(FLTK_VERSION),' \
 	    -e's,@GENERATE_HTML@,NO,' \
 	    -e's,@GENERATE_LATEX@,YES,' \
 	    -e's,@LATEX_HEADER@,src/fltk-book.tex,' \
-	    -e's,@CMAKE_CURRENT_SOURCE_DIR@/,,' \
-	    -e's,@FLTK_SOURCE_DIR@/,../,' \
+	    -e's,@CMAKE_CURRENT_SOURCE_DIR@,.,' \
+	    -e's,@CMAKE_CURRENT_BINARY_DIR@,,' \
+	    -e's,@FLTK_SOURCE_DIR@,..,' \
 	    < $< > $@
 
 # The HTML files are generated using doxygen, and this needs
@@ -164,7 +167,6 @@ html:	$(HTMLFILES) Doxyfile
 	if test "x$(DOXYDOC)" = "x" ; then \
 	  echo "Sorry - doxygen not found. Please install doxygen and run configure."; \
 	fi
-	test -d html && cp src/tiny.png html/
 
 # The PDF documentation (fltk.pdf) is generated using doxygen and LaTeX, and
 # this needs installed Doxygen and LaTeX programs and may take some time, so
@@ -191,4 +193,23 @@ src/fltk-book.tex: src/fltk-book.tex.in
 
 src/fltk-book.tex.in: src/fltk-title.tex.in
 	echo "Generating $@ ..."
-	./make_header src/fltk-title.tex.in src/fltk-book.tex.in
+	GIT_REVISION=`git rev-parse --short=10 HEAD`; \
+	./make_header $< $@; \
+	sed -i -e"s/@GIT_REVISION@/$$GIT_REVISION/g" $@
+
+
+generated.dox: generated.dox.in
+	echo "Generating $@ ..."
+	CURRENT_DATE=`date "+%b %d, %Y"`; \
+	GIT_REVISION=`git rev-parse --short=10 HEAD`; \
+	DOXYGEN_VERSION_SHORT=`$(DOXYDOC) --version|cut -f1 -d' '`; \
+	sed -e"s/@CURRENT_DATE@/$$CURRENT_DATE/g" \
+	    -e"s/@GIT_REVISION@/$$GIT_REVISION/g" \
+	    -e"s/@DOXYGEN_VERSION_SHORT@/$$DOXYGEN_VERSION_SHORT/g" \
+	    < $< > $@
+
+copyright.dox: copyright.dox.in
+	echo "Generating $@ ..."
+	YEAR=`date +%Y`; \
+	sed -e"s/@YEAR@/$$YEAR/g" \
+	    < $< > $@