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diff --git a/oh-my-zsh/plugins/cask/README.md b/oh-my-zsh/plugins/cask/README.md
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+++ b/oh-my-zsh/plugins/cask/README.md
@@ -0,0 +1,15 @@
+# Cask plugin
+
+[Cask](https://github.com/cask/cask) is a project management tool for Emacs that helps
+automate the package development cycle; development, dependencies, testing, building,
+packaging and more.
+
+This plugin loads `cask` completion from non-standard locations, such as if installed
+via Homebrew or others. To enable it, add `cask` to your plugins array:
+
+```zsh
+plugins=(... cask)
+```
+
+Make sure you have the `cask` directory in your `$PATH` before loading Oh My Zsh,
+otherwise you'll get a "command not found" error.
diff --git a/oh-my-zsh/plugins/cask/cask.plugin.zsh b/oh-my-zsh/plugins/cask/cask.plugin.zsh
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+++ b/oh-my-zsh/plugins/cask/cask.plugin.zsh
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+() {
+  emulate -L zsh
+
+  if ! (( $+commands[cask] )); then
+    print "zsh cask plugin: cask command not found" >&2
+    return
+  fi
+
+  cask_base=${commands[cask]:h:h}
+
+  # Plain cask installation location (for Cask 0.7.2 and earlier)
+  comp_files=($cask_base/etc/cask_completion.zsh)
+
+  # Mac Homebrew installs the completion in a different location
+  if (( $+commands[brew] )); then
+    comp_files+=($(brew --prefix)/share/zsh/site-functions/cask_completion.zsh)
+  fi
+
+  # Load first found file
+  for f in $comp_files; do
+    if [[ -f "$f" ]]; then
+      source "$f"
+      break
+    fi
+  done
+}