completion for cask

import from github.com/cask/cask, discussed in PR cask/cask#244

src/_cask

@@ -0,0 +1,80 @@
+#compdef cask
+# ------------------------------------------------------------------------------
+# Copyright (c) 2014 Github zsh-users - http://github.com/zsh-users
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are met:
+# * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+# * Redistributions in binary form must reproduce the above copyright
+# notice, this list of conditions and the following disclaimer in the
+# documentation and/or other materials provided with the distribution.
+# * Neither the name of the zsh-users nor the
+# names of its contributors may be used to endorse or promote products
+# derived from this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+# DISCLAIMED. IN NO EVENT SHALL ZSH-USERS BE LIABLE FOR ANY
+# DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+# ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+# ------------------------------------------------------------------------------
+# Description
+# -----------
+#
+# Completion script for cask (http://cask.readthedocs.org)
+#
+# ------------------------------------------------------------------------------
+# Authors
+# -------
+#
+# * ptrv <mail@petervasil.net>
+# * Johan Andersson <johan.rejeep@gmail.com>
+# * Sebastien Duthil <duthils@free.fr>
+#
+# ------------------------------------------------------------------------------
+
+function _cask() {
+    local ret=1 state
+    _arguments \
+        ':subcommand:->subcommand' \
+        '*:: :->subcmds' && ret=0
+
+    case $state in
+        subcommand)
+            subcommands=(
+                "path:Print Emacs exec-path (including package bin path)"
+                "load-path:Print Emacs load-path (including package dependencies)"
+                "help:Display this help message"
+                "info:Show info about this project"
+                "list:List dependencies"
+                "version:Show the package version"
+                "init:Create basic Cask file"
+                "exec:Execute command with correct dependencies"
+                "update:Update dependencies"
+                "install:Install dependencies"
+                "package:Create -pkg.el file"
+                "package-directory:Print package installation directory"
+            )
+            _describe -t subcommands 'cask subcommands' subcommands && ret=0
+    esac
+
+    case "$words[1]" in
+        init)
+            _arguments \
+                '(--dev)--dev[Run in dev mode]' && ret=0 ;;
+        exec)
+            _generic
+            ;;
+    esac
+
+    return ret
+}
+
+_cask "$@"