Updated cabal completion to leverage standard bash approach. Updated sandbox info.

plugins/cabal/cabal.plugin.zsh

@@ -2,46 +2,37 @@ function cabal_sandbox_info() {
     cabal_files=(*.cabal(N))
     if [ $#cabal_files -gt 0 ]; then
         if [ -f cabal.sandbox.config ]; then
-            echo "%{$fg[green]%}sandboxed%{$reset_color%}"
+            echo "%{$fg[green]%}[sandboxed] %{$reset_color%}"
         else
-            echo "%{$fg[red]%}not sandboxed%{$reset_color%}"
+            echo "%{$fg[red]%}[not sandboxed] %{$reset_color%}"
         fi
     fi
 }
 
-function _cabal_commands() {
-    local ret=1 state
-    _arguments ':subcommand:->subcommand' && ret=0
+autoload bashcompinit
+bashcompinit
 
-    case $state in
-      subcommand)
-        subcommands=(
-          "bench:Run the benchmark, if any (configure with UserHooks)"
-          "build:Make this package ready for installation"
-          "check:Check the package for common mistakes"
-          "clean:Clean up after a build"
-          "copy:Copy teh files into the install locations"
-          "configure:Prepare to build the package"
-          "fetch:Downloads packages for later installation"
-          "haddock:Generate HAddock HTML documentation"
-          "help:Help about commands"
-          "hscolour:Generate HsColour colourised code, in HTML format"
-          "info:Display detailed information about a particular package"
-          "init:Interactively create a .cabal file"
-          "install:Installs a list of packages"
-          "list:List packages matching a search string"
-          "register:Register this package with the compiler"
-          "report:Upload build reports to a remote server"
-          "sdist:Generate a source distribution file (.tar.gz)"
-          "test:Run the test suite, if any (configure with UserHooks)"
-          "unpack:Unpacks packages for user inspection"
-          "update:Updates list of known packages"
-          "upload:Uploads source packages to Hackage"
-        )
-        _describe -t subcommands 'cabal subcommands' subcommands && ret=0
-    esac
+# cabal command line completion
+# Copyright 2007-2008 "Lennart Kolmodin" <kolmodin@gentoo.org>
+#                     "Duncan Coutts"     <dcoutts@gentoo.org>
+#
 
-    return ret
+_cabal()
+{
+    # get the word currently being completed
+    local cur
+    cur=${COMP_WORDS[$COMP_CWORD]}
+
+    # create a command line to run
+    local cmd
+    # copy all words the user has entered
+    cmd=( ${COMP_WORDS[@]} )
+
+    # replace the current word with --list-options
+    cmd[${COMP_CWORD}]="--list-options"
+
+    # the resulting completions should be put into this array
+    COMPREPLY=( $( compgen -W "$( ${cmd[@]} )" -- $cur ) )
 }
 
-compdef _cabal_commands cabal
+complete -F _cabal -o default cabal