McFly replaces your default ctrl-r shell history search with an intelligent search engine that takes into account your working directory and the context of recently executed commands. McFly's suggestions are prioritized in real time with a small neural network.

TL;DR: an upgraded ctrl-r where history results make sense for what you're working on right now.

• Rebinds ctrl-r to bring up a full-screen reverse history search prioritized with a small neural network.
• Augments your shell history to track command exit status, timestamp, and execution directory in a SQLite database.
• Maintains your normal shell history file as well so that you can stop using McFly whenever you want.
• Unicode support throughout.
• Includes a simple action to scrub any history item from the McFly database and your shell history files.
• Designed to be extensible for other shells in the future.
• Written in Rust, so it's fast and safe.

The key feature of McFly is smart command prioritization powered by a small neural network that runs in real time. The goal is for the command you want to run to always be one of the top suggestions.

When suggesting a command, McFly takes into consideration:

• The directory where you ran the command. You're likely to run that command in the same directory in the future.
• What commands you typed before the command (e.g., the command's execution context).
• How often you run the command.
• When you last ran the command.
• If you've selected the command in McFly before.
• The command's historical exit status. You probably don't want to run old failed commands.

1. Install the tap:

   brew tap cantino/mcfly https://github.com/cantino/mcfly

2. Install mcfly:

   brew install mcfly

3. Add the following to the end of your ~/.bashrc, ~/.zshrc, or ~/.config/fish/config.fish file, as appropriate, changing /usr/local to your brew --prefix if needed:

   Bash:

   eval "$(mcfly init bash)"

   Zsh:

   eval "$(mcfly init zsh)"

   Fish:

   mcfly init fish | source

4. Run . ~/.bashrc / . ~/.zshrc / source ~/.config/fish/config.fish or restart your terminal emulator.

1. Remove mcfly:

   brew uninstall mcfly

2. Remove the tap:

   brew untap cantino/mcfly

3. Remove the lines you added to ~/.bashrc / ~/.zshrc / ~/.config/fish/config.fish.

1. Update the ports tree

   sudo port selfupdate

2. Install mcfly:

   sudo port install mcfly

3. Add the following to the end of your ~/.bashrc, ~/.zshrc, or ~/.config/fish/config.fish file, as appropriate:

   Bash:

   eval "$(mcfly init bash)"

   Zsh:

   eval "$(mcfly init zsh)"

   Fish:

   mcfly init fish | source

4. Run . ~/.bashrc / . ~/.zshrc / source ~/.config/fish/config.fish or restart your terminal emulator.

1. Remove mcfly:

   sudo port uninstall mcfly

2. Remove the lines you added to ~/.bashrc / ~/.zshrc / ~/.config/fish/config.fish.

1. Download the latest release from GitHub.

2. Install to a location in your $PATH. (For example, you could create a directory at ~/bin, copy mcfly to this location, and add export PATH="$PATH:$HOME/bin" to your .bashrc / .zshrc, or run set -Ua fish_user_paths "$HOME/bin" for fish.)

3. Add the following to the end of your ~/.bashrc, ~/.zshrc, or ~/.config/fish/config.fish file, respectively:

   Bash:

   eval "$(mcfly init bash)"

   Zsh:

   eval "$(mcfly init zsh)"

   Fish:

   mcfly init fish | source

4. Run . ~/.bashrc / . ~/.zshrc / source ~/.config/fish/config.fish or restart your terminal emulator.

1. Install Rust 1.40 or later

2. Run git clone https://github.com/cantino/mcfly and cd mcfly

3. Run cargo install --path .

4. Ensure ~/.cargo/bin is in your $PATH.

5. Add the following to the end of your ~/.bashrc, ~/.zshrc, or ~/.config/fish/config.fish file, respectively:

   Bash:

   eval "$(mcfly init bash)"

   Zsh:

   eval "$(mcfly init zsh)"

   Fish:

   mcfly init fish | source

6. Run . ~/.bashrc / . ~/.zshrc / source ~/.config/fish/config.fish or restart your terminal emulator.

To avoid McFly's UI messing up your scrollback history in iTerm2, make sure this option is unchecked:

A number of settings can be set via environment variables. To set a setting you should add the following snippets to your ~/.bashrc / ~/.zshrc / ~/.config/fish/config.fish.

To swap the color scheme for use in a light terminal, set the environment variable MCFLY_LIGHT.

bash / zsh:

export MCFLY_LIGHT=TRUE

fish:

set -gx MCFLY_LIGHT TRUE

By default Mcfly uses an emacs inspired key scheme. If you would like to switch to the vim inspired key scheme, set the environment variable MCFLY_KEY_SCHEME.

bash / zsh:

export MCFLY_KEY_SCHEME=vim

fish:

set -gx MCFLY_KEY_SCHEME vim

To enable fuzzy searching, set MCFLY_FUZZY.

bash / zsh:

export MCFLY_FUZZY=true

fish:

set -gx MCFLY_FUZZY true

If you have a very large history database and you notice that McFly launches slowly, you can set MCFLY_HISTORY_LIMIT to something like 10000 to limit how many records are considered when searching. In this example, McFly would search only the latest 10,000 entries.

• Add a screencast to README.
• Learn common command options and autocomplete them in the suggestion UI?
• Sort command line args when coming up with the template matching string.
• Possible prioritization improvements:
  • Cross validation & explicit training set selection.
  • Learn command embeddings

cargo test

1. Edit Cargo.toml and bump the version.
2. Edit CHANGELOG.txt
3. Recompile (cargo build).
4. git add -p
5. git ci -m 'Bumping to vx.x.x'
6. git tag vx.x.x
7. git push origin head --tags
8. Let the build finish.
9. Edit the new Release on Github.
10. Edit pkg/brew/mcfly.rb and update the version and SHAs. (shasum -a 256 ...)
11. git push
12. cargo publish