Refactor generation of git-annex.cabal and incorporate man pages.

The existing `sed | find | perl` hack in the Makefile was not
including the man pages in the generated git-annex.cabal.  I couldn't
figure out why it didn't work; running the `find | perl` part of the
command *did* list the man pages ...

So, I set up a new hack. It produces a cleaner .cabal file and
includes the man pages in the sdist.  I changed git-annex.cabal and
its generation as follows:

- git-annex.cabal is now generated by a here document in
  git-annex.cabal.template.sh.  The here document has inline file list
  insertion, whereas before the file lists were inserted with sed.

- The 'Extra-Source-Files:' field now only includes the non-source
  files: the man pages, plain text documentation, and license.

- The source dependencies are now listed in 'Other-Modules' sections
  in the 'Executable' and 'Test-Suite' sections.  The list of
  dependencies is generated by `gen-other-modules.sh`.

- The ./debian and ./doc are no longer included in the sdist package.
  These were not installed anywhere by `cabal install`.  A user that
  wants them could clone the git repo.

Running the tests with cabal is not yet working, i.e.

  cabal configure --enable-tests && cabal build && cabal test

and

  cabal install --enable-tests

fail to find Utility.Touch.  However, I did not break this: it doesn't
work for the git-annex package on Hackage either.  Next step is to
figure out how to deal with HSC in cabal ... or not bother, because
`make test` works.  I'm worried this is a cabal bug.

To test building from sdist, I've been running

  cd ../.. ; cabal sdist ; cd dist ; tar xf git-annex-3.20120605.tar.gz && cd git-annex-3.20120605 && rm -fr /tmp/git-annex && cabal install --prefix=/tmp/git-annex && tree -A /tmp/git-annex

in the dist directory.  Using `cabal-dev install` is a better test,
but is very slow.

.gitignore

@@ -3,6 +3,7 @@ test
 configure
 Build/SysConfig.hs
 git-annex
+git-annex.cabal
 git-annex.1
 git-annex-shell.1
 git-union-merge.1

Makefile

@@ -98,16 +98,20 @@ docs: $(mans)
 
 clean:
 	rm -rf tmp $(bins) $(mans) test configure  *.tix .hpc $(sources) \
-		doc/.ikiwiki html dist $(clibs)
+		doc/.ikiwiki html dist $(clibs) git-annex.cabal
 
 # Workaround for cabal sdist not running Setup hooks, so I cannot
 # generate a file list there.
-sdist: clean
-	@make $(mans)
-	@if [ ! -e git-annex.cabal.orig ]; then cp git-annex.cabal git-annex.cabal.orig; fi
-	@sed -e "s!\(Extra-Source-Files: \).*!\1$(shell find . -name .git -prune -or -not -name \\*.orig -not -type d -print | perl -ne 'print unless length >= 100')!i" < git-annex.cabal.orig > git-annex.cabal
-	@cabal sdist
-	@mv git-annex.cabal.orig git-annex.cabal
+sdist: clean $(mans)
+  # Could make this a .PHONY, but it needs to be rerun each time,
+  # unless we want to list a *lot* of dependencies.
+	./git-annex.cabal.template.sh > git-annex.cabal
+  # Complains about not running 'configure' first, but adding
+  #
+  #   cabal configure
+  #
+  # does not help.
+	cabal sdist
 
 # Upload to hackage.
 hackage: sdist

gen-other-modules.sh

@@ -0,0 +1,32 @@
+#!/bin/bash
+
+# Generate module list for 'Other-Modules:' field in git-annex.cabal.
+# This would be simpler if the code were under ./src.
+
+find Annex Annex.hs \
+     Backend Backend.hs \
+     Build \
+     Checks.hs \
+     CmdLine.hs \
+     Command Command.hs \
+     Common Common.hs \
+     Config.hs \
+     Crypto.hs \
+     Git Git.hs \
+     GitAnnex.hs \
+     GitAnnexShell.hs \
+     Init.hs \
+     Limit.hs \
+     Locations.hs \
+     Logs \
+     Messages Messages.hs \
+     Option.hs \
+     Remote Remote.hs \
+     Seek.hs \
+     Setup.hs \
+     Types Types.hs \
+     Upgrade Upgrade.hs \
+     Usage.hs \
+     Utility \
+     -name '*.hs' \
+| sed -r -e 's!.hs!!' -e 's!/!.!g'

git-annex.cabal.template.sh

@@ -1,3 +1,9 @@
+#!/bin/bash
+
+# Template for git-annex.cabal: the 'Other-Module:' fields are
+# dynamically generated.
+
+cat <<EOF
 Name: git-annex
 Version: 3.20120605
 Cabal-Version: >= 1.8
@@ -7,7 +13,6 @@ Author: Joey Hess
 Stability: Stable
 Copyright: 2010-2012 Joey Hess
 License-File: GPL
-Extra-Source-Files: use-make-sdist-instead
 Homepage: http://git-annex.branchable.com/
 Build-type: Custom
 Category: Utility
@@ -25,6 +30,9 @@ Description:
  versioned files, which is convenient for maintaining documents, Makefiles,
  etc that are associated with annexed files but that benefit from full
  revision control.
+Extra-Source-Files:
+  git-annex.1 git-annex-shell.1
+  INSTALL README CHANGELOG NEWS GPL
 
 Flag S3
   Description: Enable S3 support
@@ -36,7 +44,10 @@ Executable git-annex
    pcre-light, extensible-exceptions, dataenc, SHA, process, json, HTTP,
    base == 4.5.*, monad-control, transformers-base, lifted-base,
    IfElse, text, QuickCheck >= 2.1, bloomfilter, edit-distance
-  Other-Modules: Utility.Touch
+  Other-Modules:
+   Utility.Touch
+   -- Auto-generated list of all Haskell modules:
+`./gen-other-modules.sh | xargs -n1 -i echo '   '{}`
   C-Sources: Utility/libdiskfree.c
   Extensions: CPP
 
@@ -53,8 +64,13 @@ Test-Suite test
    base == 4.5.*, monad-control, transformers-base, lifted-base,
    IfElse, text, QuickCheck >= 2.1, bloomfilter, edit-distance
   C-Sources: Utility/libdiskfree.c
+  Other-Modules:
+   Utility.Touch
+   -- Auto-generated list of all Haskell modules:
+`./gen-other-modules.sh | xargs -n1 -i echo '   '{}`
   Extensions: CPP
 
 source-repository head
   type: git
   location: git://git-annex.branchable.com/
+EOF