Version build dependency on STM, and allow building without it, which disables the watch command.

GitAnnex.hs

@@ -5,6 +5,8 @@
  - Licensed under the GNU GPL version 3 or higher.
  -}
 
+{-# LANGUAGE CPP #-}
+
 module GitAnnex where
 
 import System.Console.GetOpt
@@ -58,7 +60,9 @@ import qualified Command.Import
 import qualified Command.Map
 import qualified Command.Upgrade
 import qualified Command.Version
+#ifdef WITH_ASSISTANT
 import qualified Command.Watch
+#endif
 
 cmds :: [Command]
 cmds = concat
@@ -100,7 +104,9 @@ cmds = concat
 	, Command.Map.def
 	, Command.Upgrade.def
 	, Command.Version.def
+#ifdef WITH_ASSISTANT
 	, Command.Watch.def
+#endif
 	]
 
 options :: [Option]

Makefile

@@ -14,7 +14,7 @@ endif
 
 PREFIX=/usr
 IGNORE=-ignore-package monads-fd -ignore-package monads-tf
-BASEFLAGS=-Wall $(IGNORE) -outputdir tmp -IUtility -DWITH_S3 $(BASEFLAGS_OPTS)
+BASEFLAGS=-Wall $(IGNORE) -outputdir tmp -IUtility -DWITH_ASSISTANT -DWITH_S3 $(BASEFLAGS_OPTS)
 GHCFLAGS=-O2 $(BASEFLAGS)
 CFLAGS=-Wall
 

debian/changelog

@@ -1,6 +1,8 @@
 git-annex (3.20120625) UNRELEASED; urgency=low
 
   * cabal: Only try to use inotify on Linux.
+  * Version build dependency on STM, and allow building without it,
+    which disables the watch command.
 
  -- Joey Hess <joeyh@debian.org>  Mon, 25 Jun 2012 11:38:12 -0400
 

debian/control

@@ -21,7 +21,7 @@ Build-Depends:
 	libghc-bloomfilter-dev,
 	libghc-edit-distance-dev,
 	libghc-hinotify-dev [linux-any],
-	libghc-stm-dev,
+	libghc-stm-dev (>= 2.3),
 	ikiwiki,
 	perlmagick,
 	git,

doc/bugs/error_building_git-annex_3.20120624_using_cabal.mdwn

@@ -152,3 +152,8 @@ I am trying to install git-annex 3.20120624 using cabal.  My currently installed
     ExitFailure 1
 
 This is using haskell-platform 2012.1.0.0~debian1 on Ubuntu 12.04.
+
+> Turns out it needs version 2.3 of the STM library. (libghc-stm-dev
+> package). I've made cabal detect an older version and skip building
+> the new `git annex watch` command, so you'll be able to build the next
+> release. [[done]] --[[Joey]]

doc/install.mdwn

@@ -37,12 +37,13 @@ To build and use git-annex, you will need:
   * [TestPack](http://hackage.haskell.org/cgi-bin/hackage-scripts/package/testpack)
   * [QuickCheck 2](http://hackage.haskell.org/package/QuickCheck)
   * [HTTP](http://hackage.haskell.org/package/HTTP)
-  * [hS3](http://hackage.haskell.org/package/hS3) (optional)
   * [json](http://hackage.haskell.org/package/json)
   * [IfElse](http://hackage.haskell.org/package/IfElse)
   * [bloomfilter](http://hackage.haskell.org/package/bloomfilter)
   * [edit-distance](http://hackage.haskell.org/package/edit-distance)
+  * [hS3](http://hackage.haskell.org/package/hS3) (optional)
   * [stm](http://hackage.haskell.org/package/stm)
+    (optional; version 2.3 or newer)
   * [hinotify](http://hackage.haskell.org/package/hinotify)
     (optional; Linux only)
 * Shell commands

git-annex.cabal

@@ -1,5 +1,5 @@
 Name: git-annex
-Version: 3.20120624
+Version: 3.20120625
 Cabal-Version: >= 1.8
 License: GPL
 Maintainer: Joey Hess <joey@kitenet.net>
@@ -31,13 +31,16 @@ Flag S3
 Flag Inotify
   Description: Enable inotify support
 
+Flag Assistant
+  Description: Enable git-annex assistant and watch command
+
 Executable git-annex
   Main-Is: git-annex.hs
   Build-Depends: MissingH, hslogger, directory, filepath,
    unix, containers, utf8-string, network, mtl, bytestring, old-locale, time,
    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, stm
+   IfElse, text, QuickCheck >= 2.1, bloomfilter, edit-distance
   -- Need to list this because it's generated from a .hsc file.
   Other-Modules: Utility.Touch
   C-Sources: Utility/libdiskfree.c
@@ -47,6 +50,10 @@ Executable git-annex
     Build-Depends: hS3
     CPP-Options: -DWITH_S3
 
+  if flag(Assistant)
+    Build-Depends: stm >= 2.3
+    CPP-Options: -DWITH_ASSISTANT
+
   if os(linux) && flag(Inotify)
     Build-Depends: hinotify
     CPP-Options: -DWITH_INOTIFY
@@ -58,7 +65,7 @@ Test-Suite test
    unix, containers, utf8-string, network, mtl, bytestring, old-locale, time,
    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, stm
+   IfElse, text, QuickCheck >= 2.1, bloomfilter, edit-distance
   Other-Modules: Utility.Touch
   C-Sources: Utility/libdiskfree.c
   Extensions: CPP