Merge pull request #1867 from telser/master

Simple Cabal plugin

plugins/cabal/cabal.plugin.zsh

+function _cabal_commands() {
+    local ret=1 state
+    _arguments ':subcommand:->subcommand' && ret=0
+
+    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
+
+    return ret
+}
+
+compdef _cabal_commands cabal