thefuck/README.md

# The Fuck [![Build Status](https://travis-ci.org/nvbn/thefuck.svg)](https://travis-ci.org/nvbn/thefuck) 

**Aliases changed in 1.34.**

Magnificent app which corrects your previous console command,
inspired by a [@liamosaur](https://twitter.com/liamosaur/)
[tweet](https://twitter.com/liamosaur/status/506975850596536320).

![gif with examples](https://raw.githubusercontent.com/nvbn/thefuck/master/example.gif)

Few more examples:

```bash
➜ apt-get install vim
E: Could not open lock file /var/lib/dpkg/lock - open (13: Permission denied)
E: Unable to lock the administration directory (/var/lib/dpkg/), are you root?

➜ fuck
sudo apt-get install vim
[sudo] password for nvbn:
Reading package lists... Done
...
```

```bash
➜ git push
fatal: The current branch master has no upstream branch.
To push the current branch and set the remote as upstream, use

    git push --set-upstream origin master


➜ fuck
git push --set-upstream origin master
Counting objects: 9, done.
...
```

```bash
➜ puthon
No command 'puthon' found, did you mean:
 Command 'python' from package 'python-minimal' (main)
 Command 'python' from package 'python3' (main)
zsh: command not found: puthon

➜ fuck
python
Python 3.4.2 (default, Oct  8 2014, 13:08:17)
...
```

```bash
➜ git brnch
git: 'brnch' is not a git command. See 'git --help'.

Did you mean this?
	branch

➜ fuck
git branch
* master
```

```bash
➜ lein rpl
'rpl' is not a task. See 'lein help'.

Did you mean this?
         repl

➜ fuck
lein repl
nREPL server started on port 54848 on host 127.0.0.1 - nrepl://127.0.0.1:54848
REPL-y 0.3.1
...
```

If you are scared to blindly run the changed command, there is a `require_confirmation`
[settings](#settings) option:

```bash
➜ apt-get install vim
E: Could not open lock file /var/lib/dpkg/lock - open (13: Permission denied)
E: Unable to lock the administration directory (/var/lib/dpkg/), are you root?

➜ fuck
sudo apt-get install vim [Enter/Ctrl+C]
[sudo] password for nvbn:
Reading package lists... Done
...
```

## Requirements

- python (2.7+ or 3.3+)
- pip
- python-dev

## Installation

Install `The Fuck` with `pip`:

```bash
sudo pip install thefuck
```

[Or using an OS package manager (OS X, Ubuntu, Arch).](https://github.com/nvbn/thefuck/wiki/Installation)

And add to the `.bashrc` or `.bash_profile`(for OSX):

```bash
alias fuck='eval $(thefuck $(fc -ln -1)); history -r'
# You can use whatever you want as an alias, like for Mondays:
alias FUCK='fuck'
```

Or in your `.zshrc`:

```bash
alias fuck='eval $(thefuck $(fc -ln -1 | tail -n 1)); fc -R'
```

If you are using `tcsh`:
```tcsh
alias fuck 'set fucked_cmd=`history -h 2 | head -n 1` && eval `thefuck ${fucked_cmd}`'
```

Alternatively, you can redirect the output of `thefuck-alias`:

```bash
thefuck-alias >> ~/.bashrc
```

[Or in your shell config (Bash, Zsh, Fish, Powershell).](https://github.com/nvbn/thefuck/wiki/Shell-aliases)

Changes will be available only in a new shell session.
To make them available immediately, run `source ~/.bashrc` (or your shell config file like `.zshrc`).


## Update

```bash
sudo pip install thefuck --upgrade
```

## How it works

The Fuck tries to match a rule for the previous command, creates a new command
using the matched rule and runs it. Rules enabled by default are as follows:

* `cargo` – runs `cargo build` instead of `cargo`;
* `cargo_no_command` – fixes wrongs commands like `cargo buid`;
* `cd_correction` – spellchecks and correct failed cd commands;
* `cd_mkdir` – creates directories before cd'ing into them;
* `cd_parent` – changes `cd..` to `cd ..`;
* `composer_not_command` – fixes composer command name;
* `cp_omitting_directory` – adds `-a` when you `cp` directory;
* `cpp11` – add missing `-std=c++11` to `g++` or `clang++`;
* `django_south_ghost` – adds `--delete-ghost-migrations` to failed because ghosts django south migration;
* `django_south_merge` – adds `--merge` to inconsistent django south migration;
* `dry` – fix repetitions like "git git push";
* `fix_alt_space` – replaces Alt+Space with Space character;
* `git_add` – fix *"Did you forget to 'git add'?"*;
* `git_branch_delete` – changes `git branch -d` to `git branch -D`;
* `git_branch_list` – catches `git branch list` in place of `git branch` and removes created branch;
* `git_checkout` – fixes branch name or creates new branch;
* `git_diff_staged` – adds `--staged` to previous `git diff` with unexpected output;
* `git_no_command` – fixes wrong git commands like `git brnch`;
* `git_pull` – sets upstream before executing previous `git pull`;
* `git_pull_clone` – clones instead of pulling when the repo does not exist;
* `git_push` – adds `--set-upstream origin $branch` to previous failed `git push`;
* `git_push_force` – adds `--force` to a `git push`;
* `git_stash` – stashes you local modifications before rebasing or switching branch;
* `go_run` – appends `.go` extension when compiling/running Go programs
* `grep_recursive` – adds `-r` when you trying to grep directory;
* `has_exists_script` – prepends `./` when script/binary exists;
* `history` – tries to replace command with most similar command from history;
* `java` – removes `.java` extension when running Java programs;
* `javac` – appends missing `.java` when compiling Java files;
* `lein_not_task` – fixes wrong `lein` tasks like `lein rpl`;
* `ls_lah` – adds -lah to ls;
* `man` – change manual section;
* `man_no_space` – fixes man commands without spaces, for example `mandiff`;
* `mercurial` – fixes wrong `hg` commands;
* `mkdir_p` – adds `-p` when you trying to create directory without parent;
* `no_command` – fixes wrong console commands, for example `vom/vim`;
* `no_such_file` – creates missing directories with `mv` and `cp` commands;
* `open` – prepends `http` to address passed to `open`;
* `pip_unknown_command` – fixes wrong pip commands, for example `pip instatl/pip install`;
* `python_command` – prepends `python` when you trying to run not executable/without `./` python script;
* `python_execute` – appends missing `.py` when executing Python files;
* `quotation_marks` – fixes uneven usage of `'` and `"` when containing args'
* `rm_dir` – adds `-rf` when you trying to remove directory;
* `sed_unterminated_s` – adds missing '/' to `sed`'s `s` commands;
* `sl_ls` – changes `sl` to `ls`;
* `ssh_known_hosts` – removes host from `known_hosts` on warning;
* `sudo` – prepends `sudo` to previous command if it failed because of permissions;
* `switch_layout` – switches command from your local layout to en;
* `systemctl` – correctly orders parameters of confusing systemctl;
* `test.py` – runs `py.test` instead of `test.py`;
* `tmux` – fixes tmux commands;
* `whois` – fixes `whois` command.

Enabled by default only on specific platforms:

* `apt_get` – installs app from apt if it not installed;
* `brew_install` – fixes formula name for `brew install`;
* `brew_unknown_command` – fixes wrong brew commands, for example `brew docto/brew doctor`;
* `brew_upgrade` – appends `--all` to `brew upgrade` as per Homebrew's new behaviour
* `pacman` – installs app with `pacman` or `yaourt` if it is not installed.

Bundled, but not enabled by default:

* `rm_root` – adds `--no-preserve-root` to `rm -rf /` command.

## Creating your own rules

For adding your own rule you should create `your-rule-name.py`
in `~/.thefuck/rules`. Rule should contain two functions:
`match(command: Command, settings: Settings) -> bool`
and `get_new_command(command: Command, settings: Settings) -> str`.
Also the rule can contain optional function
`side_effect(command: Command, settings: Settings) -> None` and
optional boolean `enabled_by_default`.

`Command` has three attributes: `script`, `stdout` and `stderr`.

`Settings` is a special object filled with `~/.thefuck/settings.py` and values from env, [more](#settings).

Simple example of the rule for running script with `sudo`:

```python
def match(command, settings):
    return ('permission denied' in command.stderr.lower()
            or 'EACCES' in command.stderr)


def get_new_command(command, settings):
    return 'sudo {}'.format(command.script)

# Optional:
enabled_by_default = True

def side_effect(command, settings):
    subprocess.call('chmod 777 .', shell=True)

priority = 1000  # Lower first, default is 1000
```

[More examples of rules](https://github.com/nvbn/thefuck/tree/master/thefuck/rules),
[utility functions for rules](https://github.com/nvbn/thefuck/tree/master/thefuck/utils.py).

## Settings

The Fuck has a few settings parameters which can be changed in `~/.thefuck/settings.py`:

* `rules` – list of enabled rules, by default `thefuck.conf.DEFAULT_RULES`;
* `require_confirmation` – requires confirmation before running new command, by default `True`;
* `wait_command` – max amount of time in seconds for getting previous command output;
* `no_colors` – disable colored output;
* `priority` – dict with rules priorities, rule with lower `priority` will be matched first;
* `debug` – enables debug output, by default `False`;

Example of `settings.py`:

```python
rules = ['sudo', 'no_command']
require_confirmation = True
wait_command = 10
no_colors = False
priority = {'sudo': 100, 'no_command': 9999}
debug = False
```

Or via environment variables:

* `THEFUCK_RULES` – list of enabled rules, like `DEFAULT_RULES:rm_root` or `sudo:no_command`;
* `THEFUCK_REQUIRE_CONFIRMATION` – require confirmation before running new command, `true/false`;
* `THEFUCK_WAIT_COMMAND` – max amount of time in seconds for getting previous command output;
* `THEFUCK_NO_COLORS` – disable colored output, `true/false`;
* `THEFUCK_PRIORITY` – priority of the rules, like `no_command=9999:apt_get=100`,
rule with lower `priority` will be matched first;
* `THEFUCK_DEBUG` – enables debug output, `true/false`.

For example:

```bash
export THEFUCK_RULES='sudo:no_command'
export THEFUCK_REQUIRE_CONFIRMATION='true'
export THEFUCK_WAIT_COMMAND=10
export THEFUCK_NO_COLORS='false'
export THEFUCK_PRIORITY='no_command=9999:apt_get=100'
```

## Developing

Install `The Fuck` for development:

```bash
pip install -r requirements.txt
python setup.py develop
```

Run tests:

```bash
py.test
```

## License MIT
Project License can be found [here](LICENSE.md).