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https://github.com/mbrubeck/compleat

Generate command-line completions using a simple DSL.
https://github.com/mbrubeck/compleat

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Generate command-line completions using a simple DSL.

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Compleat

========



Generate tab completion for any shell command by specifying its usage in a

familiar manpage-like format.  For example, a usage specification for

`top(1)`:



    top [-b | -c | -H | -i | -s | -S | -d  | -n  | -p  ...] ... ;

    top (-h|-v)



Supported shells are `bash`, `fish`, and `zsh`.



Installation

------------



Get the source code: `git clone git://github.com/mbrubeck/compleat.git`



Next, install [Stack][stack].



To install Compleat in your system, run:



    make install



This will install the `compleat` binary into `~/.local/bin` and the

`compleat_setup` script into `$BASH_COMPLETION_USER_DIR` (defaults to

`$XDG_DATA_HOME/bash-completion/completions` or

`~/.local/share/bash-completion/completions`):



### bash



To enable compleat in bash, add the following line to your `.bashrc`.

(Adjust the path if you configured with a custom prefix.)



    source ${BASH_COMPLETION_USER_DIR}/compleat_setup



and install your .usage files in a directory named `/etc/compleat.d` or

`~/.compleat`:



    mkdir ~/compleat

    cp examples/* ~/compleat



Restart your shell to begin using completions:



    exec bash



### zsh



zsh support requires zsh >= 4.2.1, and currently uses zsh's bash-compatibility

mode rather than taking advantage of zsh's extended completion features.



To enable compleat in zsh, make the following change to your `.zshrc`.

(Adjust the path if you configured with a custom prefix.)



If you used the zsh wizard (zsh-newuser-install) to set up your `zshrc`, it should contain lines

like the following (if they don't exist, simply add the lines in the change below):



    autoload -Uz compinit

    compinit



Change these to:



    autoload -Uz compinit bashcompinit

    compinit

    bashcompinit



    source ~/.bash_completion.d/compleat_setup



and install your .usage files in a directory named `/etc/compleat.d` or

`~/.compleat`:



    sudo mkdir /etc/compleat.d

    sudo cp examples/* /etc/compleat.d



Restart your shell to begin using completions:



    exec zsh



### fish



To install the fish completion file, run:



    make install-fish



To enable compleat in fish, add the following line to your `~/.config/fish/config.fish`.



    source ~/.config/fish/compleat_setup.fish



and install your .usage files in a directory named `/etc/compleat.d` or

`~/.compleat`:



    mkdir ~/compleat

    cp examples/* ~/compleat



Restart your shell to begin using completions:



    exec fish



### Testing



Type `top` and then press Tab a few times to see the example files in action.



Syntax

------



A usage file contains commands and definitions, separated by semicolons.



A *command* consists of a *command name* followed by a *pattern*.  The command

name can be any atom.  If there is more than one command in the file, compleat

will attempt to match each of them against the input line.



An *atom* consists of letters, numbers, and any of the characters `-_/@=+.,:`,

or any string enclosed in double quotes with C/Java-style backslash escapes.



The following are valid patterns:



* Any atom matches itself: `foo` matches the string `foo`.  `"x\\y"` matches

  the string `x\y`.

* `a b` matches `a` followed by `b`.

* `a b | c` matches either `a b` or `c`.

* `[a]` matches zero or one occurrences of `a`.

* `a ...` matches one or more occurrences of `a`.

* `[a] ...` matches zero or more occurrences of `a`.



Use parentheses to group patterns:



* `a (b | c)` matches `a` followed by either `b` or `c`.

* `(a | b) ...` matches `a` or `b` followed by any number of additional

  `a` or `b`.



Patterns may also include *variables*:



* `name = value;` defines a new variable.  The name can be any atom,

  and the value can be any pattern.  Then `` in a pattern refers to the

  value as a sub-pattern.



* `name = !command;` defines a variable that uses a shell command to

  generate suggested completions.  The shell command should print one

  suggested completion per line.  The `$COMP_LINE` and `$COMP_CWORD`

  environment will contain the input line and the current word being

  completed.



* If no value is defined for `name`, then the pattern `` will match any

  word.



Copyright

---------



Copyright (c) 2009 Matt Brubeck



Permission is hereby granted, free of charge, to any person

obtaining a copy of this software and associated documentation

files (the "Software"), to deal in the Software without

restriction, including without limitation the rights to use,

copy, modify, merge, publish, distribute, sublicense, and/or sell

copies of the Software, and to permit persons to whom the

Software is furnished to do so, subject to the following

conditions:



The above copyright notice and this permission notice shall be

included in all copies or substantial portions of the Software.



THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,

EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES

OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND

NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT

HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,

WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING

FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR

OTHER DEALINGS IN THE SOFTWARE.



[stack]: https://docs.haskellstack.org/en/stable/README/#how-to-install