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diff --git a/zsh/oh-my-zsh/plugins/mix-fast/README.md b/zsh/oh-my-zsh/plugins/mix-fast/README.md
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+# mix-fast
+
+Fast mix autocompletion plugin.
+
+This script caches the output for later usage and significantly speeds it up.
+It generates a .mix_tasks cache file for current project. Currently if you want
+to update cache you should remove .mix_tasks file
+
+Inspired by and based on rake-fast zsh plugin.
+
+This is entirely based on [this pull request by Ullrich Schäfer](https://github.com/robb/.dotfiles/pull/10/), which is inspired by [this Ruby on Rails trick from 2006](https://weblog.rubyonrails.org/2006/3/9/fast-rake-task-completion-for-zsh/).
+
+
+## Installation
+
+Just add the plugin to your `.zshrc`:
+
+```bash
+plugins=(foo bar mix-fast)
+```
+
+You might consider adding `.mix_tasks` to your [global .gitignore](https://help.github.com/articles/ignoring-files#global-gitignore)
+
+## Usage
+
+`mix`, then press tab
+
+Currently maintained by [styx](https://github.com/styx/)
diff --git a/zsh/oh-my-zsh/plugins/mix-fast/mix-fast.plugin.zsh b/zsh/oh-my-zsh/plugins/mix-fast/mix-fast.plugin.zsh
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+_mix_refresh () {
+  if [ -f .mix_tasks ]; then
+    rm .mix_tasks
+  fi
+  echo "Generating .mix_tasks..." > /dev/stderr
+  _mix_generate
+  cat .mix_tasks
+}
+
+_mix_does_task_list_need_generating () {
+  [ ! -f .mix_tasks ];
+}
+
+_mix_generate () {
+  mix help | grep '^mix [^ ]' | sed -E "s/mix ([^ ]*) *# (.*)/\1:\2/" > .mix_tasks
+}
+
+_mix () {
+  if [ -f mix.exs ]; then
+    if _mix_does_task_list_need_generating; then
+      echo "\nGenerating .mix_tasks..." > /dev/stderr
+      _mix_generate
+    fi
+    local tasks=(${(f)"$(cat .mix_tasks)"})
+    _describe 'tasks' tasks
+  fi
+}
+
+compdef _mix mix
+alias mix_refresh='_mix_refresh'