More Pandoc HTML fixes (#717)

- Make html manpages build with old pandoc versions
- Add building of html docs to CMake

Author: ktmf01

CMakeLists.txt

@@ -300,7 +300,15 @@ if(INSTALL_MANPAGES)
             OUTPUT man/metaflac.1
             COMMAND pandoc --standalone --to man "${CMAKE_SOURCE_DIR}/man/metaflac.md" > man/metaflac.1
             )
-               add_custom_target(man ALL DEPENDS man/flac.1 man/metaflac.1)
+        add_custom_command(
+            OUTPUT man/flac.html
+            COMMAND pandoc --standalone --embed-resources --to html "${CMAKE_SOURCE_DIR}/man/flac.md" > man/flac.html || pandoc --self-contained --to html "${CMAKE_SOURCE_DIR}/man/flac.md" > man/flac.html
+            )
+        add_custom_command(
+            OUTPUT man/metaflac.html
+            COMMAND pandoc --standalone --embed-resources --to html "${CMAKE_SOURCE_DIR}/man/metaflac.md" > man/metaflac.html || pandoc --self-contained --to html "${CMAKE_SOURCE_DIR}/man/metaflac.md" > man/metaflac.html
+            )
+        add_custom_target(man ALL DEPENDS man/flac.1 man/metaflac.1 man/flac.html man/metaflac.html)
         install(FILES "${CMAKE_BINARY_DIR}/man/flac.1" "${CMAKE_BINARY_DIR}/man/metaflac.1" DESTINATION "${CMAKE_INSTALL_MANDIR}/man1")
     else()
         if(EXISTS "${CMAKE_SOURCE_DIR}/man/flac.1" AND EXISTS "${CMAKE_SOURCE_DIR}/man/metaflac.1")

man/Makefile.am

@@ -22,12 +22,12 @@ flac.1: flac.md
 
 metaflac.1: metaflac.md
 	pandoc --standalone --to man $? > $@
-	
+
 flac.html: flac.md
-	pandoc --standalone --to html --css style.css -B header.inc -A footer.inc --embed-resources $? > $@
+	pandoc --standalone --to html --css style.css -B header.inc -A footer.inc --embed-resources $? > $@ || pandoc --self-contained --to html --css style.css -B header.inc -A footer.inc $? > $@
 
 metaflac.html: metaflac.md
-	pandoc --standalone --to html --css style.css -B header.inc -A footer.inc --embed-resources $? > $@
+	pandoc --standalone --to html --css style.css -B header.inc -A footer.inc --embed-resources $? > $@ ||  pandoc --self-contained --to html --css style.css -B header.inc -A footer.inc $? > $@
 
 man_MANS = flac.1 metaflac.1
 doc_DATA = flac.html metaflac.html