windows build foo

build.bat

@@ -0,0 +1 @@
+C:\MINGW\MSYS\1.0\BIN\SH.EXE standalone/windows/build-simple.sh

doc/install/Windows.mdwn

@@ -29,6 +29,7 @@ the Haskell Platform, Mingw, and Cygwin. Use Cygwin to install
 gcc, rsync, git, wget, ssh, and gnupg. To build the git-annex installer,
 you also need to install the NulSoft installer system.
 
-There is a shell script `standalone/windows/build.sh` that can be
+	cabal update
-used to build git-annex. Note that this shell script cannot be run
+	cabal unpack git-annex -d gitannex
-in Cygwin; run it with the Mingw sh.
+	cd gitannex
+	build

standalone/windows/build-simple.sh

@@ -0,0 +1,31 @@
+#!/bin/sh
+# Script to build git-annex on windows. Run by build.bat
+
+set -e
+
+# Path to the Haskell Platform.
+HP="/c/Program Files (x86)/Haskell Platform/2012.4.0.0"
+
+PATH="$HP/bin:$HP/lib/extralibs/bin:/c/Program Files (x86)/NSIS:$PATH"
+
+# Run a command with the cygwin environment available.
+# However, programs not from cygwin are preferred.
+withcyg () {
+	PATH="$PATH:/c/cygwin/bin" "$@"
+}
+
+# Install haskell dependencies.
+# cabal install is not run in cygwin, because we don't want configure scripts
+# for haskell libraries to link them with the cygwin library.
+cabal install --only-dependencies || true
+
+# Build git-annex
+withcyg cabal configure
+withcyg cabal build || true
+
+# Works around link failure https://ghc.haskell.org/trac/ghc/ticket/8596
+# using a response file.
+rm -f build.log gcc.opt
+withcyg cabal build --ghc-options='-v -keep-tmp-files' > build.log 2>&1
+grep '"dist\\build\\git-annex\\git-annex.exe"' build.log | sed -e 's/^"[^"]*" //' -e 's/\\/\//g' > gcc.opt
+"$HP/mingw/bin/gcc.exe" @gcc.opt