Switch to using Halibut's new direct .CHM generation.

This allows me to remove HTML Help Workshop completely from my build
dependencies, and good riddance!

Buildscr

@@ -51,14 +51,10 @@ enddelegate
 
 # Build the Windows binaries and installer, and the CHM file.
 in puzzles do make -f Makefile.doc clean
-in puzzles do make -f Makefile.doc chm
-in puzzles do make -f Makefile.doc # build help file for installer
+in puzzles do make -f Makefile.doc # build help files for installer
 in puzzles do mason.pl --args '{"version":"$(Version)","descfile":"gamedesc.txt"}' winwix.mc > puzzles.wxs
 in puzzles do perl winiss.pl $(Version) gamedesc.txt > puzzles.iss
 delegate windows
-  # Ignore the poorly controlled return value from HHC, and instead
-  # just test that the output file was generated.
-  in puzzles with htmlhelp do/win hhc puzzles.hhp & type puzzles.chm >nul
   # FIXME: Cygwin alternative?
   in puzzles with visualstudio do/win nmake -f Makefile.vc clean
   in puzzles with visualstudio do/win nmake -f Makefile.vc VER=-DVER=$(Version)
@@ -72,7 +68,6 @@ delegate windows
   in puzzles with wix do/win candle puzzles.wxs && light -ext WixUIExtension -sval puzzles.wixobj
   in puzzles with innosetup do/win iscc puzzles.iss
   ifneq "$(winsigncode)" "" in puzzles do $(winsigncode) -i https://www.chiark.greenend.org.uk/~sgtatham/puzzles/ -n "Simon Tatham's Portable Puzzle Collection Installer" puzzles.msi Output/installer.exe
-  return puzzles/puzzles.chm
   return puzzles/*.exe
   return puzzles/Output/installer.exe
   return puzzles/puzzles.msi
@@ -114,9 +109,7 @@ in puzzles do chmod +x *.exe
 #  return puzzles/puzzles.armv4.cab
 #enddelegate
 
-# Build the help file and the HTML docs.
-in puzzles do make -f Makefile.doc clean # remove CHM-target HTML
-in puzzles do make -f Makefile.doc # and rebuild help file...
+# Build the HTML docs.
 in puzzles do mkdir doc
 in puzzles do mkdir devel
 in puzzles/doc do halibut --html -Chtml-contents-filename:index.html -Chtml-index-filename:indexpage.html -Chtml-template-filename:%k.html -Chtml-template-fragment:%k ../puzzles.but

Makefile.doc

@@ -1,17 +1,17 @@
-all: puzzles.hlp puzzles.txt HACKING
+all: puzzles.chm puzzles.hlp puzzles.txt HACKING
 
 preprocessed.but: puzzles.but
 	sed 's/PREFIX-/$(BINPREFIX)/g' puzzles.but > preprocessed.but
 
-puzzles.hlp puzzles.txt: preprocessed.but
-	halibut --winhelp=puzzles.hlp --text=puzzles.txt preprocessed.but
+puzzles.chm: preprocessed.but
+	halibut --chm=puzzles.chm preprocessed.but
+puzzles.hlp: preprocessed.but
+	halibut --winhelp=puzzles.hlp preprocessed.but
+puzzles.txt: preprocessed.but
+	halibut --text=puzzles.txt preprocessed.but
 
 HACKING: devel.but
 	halibut --text=HACKING devel.but
 
-chm: puzzles.hhp
-puzzles.hhp: puzzles.but chm.but
-	halibut --html puzzles.but chm.but
-
 clean:
 	rm -f puzzles.hlp puzzles.txt preprocessed.but HACKING *.html *.hh[pck]

chm.but

@@ -1,21 +0,0 @@
-\# File containing the magic HTML configuration directives to create
-\# an MS HTML Help project. We put this on the end of the Puzzles
-\# docs build command line to build the HHP and friends.
-
-\cfg{html-leaf-level}{infinite}
-\cfg{html-leaf-contains-contents}{false}
-\cfg{html-suppress-navlinks}{true}
-\cfg{html-suppress-address}{true}
-
-\cfg{html-contents-filename}{index.html}
-\cfg{html-template-filename}{%k.html}
-\cfg{html-template-fragment}{%k}
-
-\cfg{html-mshtmlhelp-chm}{puzzles.chm}
-\cfg{html-mshtmlhelp-project}{puzzles.hhp}
-\cfg{html-mshtmlhelp-contents}{puzzles.hhc}
-\cfg{html-mshtmlhelp-index}{puzzles.hhk}
-
-\cfg{html-body-end}{}
-
-\cfg{html-head-end}{<link rel="stylesheet" type="text/css" href="chm.css">}

puzzles.but

@@ -13,6 +13,12 @@
 \cfg{html-contents-depth-1}{2}
 \cfg{html-leaf-contains-contents}{true}
 
+\cfg{chm-filename}{puzzles.chm}
+\cfg{chm-contents-filename}{index.html}
+\cfg{chm-template-filename}{%k.html}
+\cfg{chm-head-end}{<link rel="stylesheet" type="text/css" href="chm.css">}
+\cfg{chm-extra-file}{chm.css}
+
 \cfg{info-filename}{puzzles.info}
 
 \cfg{ps-filename}{puzzles.ps}