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emacs-bash-completion

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bash-completion for Emacs

bash-completion.el defines dynamic completion hooks for shell-modeand shell-command prompts that is based on bash completion.

Bash completion for Emacs:

is aware of bash builtins, aliases and functions
does file expansion inside of colon-separated variablesand after redirections (> or <)
escapes special characters when expanding file names
is configurable through programmable bash completion
works on remote shells, through TRAMP.

A simpler and more complete alternative to bash-completion.el is torun a bash shell in a buffer in term mode (M-x ansi-term).Unfortunately, many Emacs editing features are not available whenrunning in term mode. Also, term mode is not available inshell-command prompts.

INSTALLATION

Copy bash-completion.el into a directory that's on Emacs load-path.You can do that manually, or by installing it fromMELPA.

Shell completion

To enable bash completion in shell buffers as well as in commandprompts, such as the prompt started by compile, add the hookbash-completion-dynamic-complete toshell-dynamic-complete-functions.

For example:

(autoload 'bash-completion-dynamic-complete
          "bash-completion"
          "BASH completion hook")
        (add-hook 'shell-dynamic-complete-functions
          'bash-completion-dynamic-complete)

or simpler, but forces you to load bash-completion at startup:

(require 'bash-completion)
        (bash-completion-setup)

After that reload your .emacs (M-x eval-buffer) or restart.

When called from a bash shell buffer,bash-completion-dynamic-complete communicates with the current shellto reproduce, as closely as possible the normal bash auto-completion,available on full terminals.

When called from non-shell buffers, such as the prompt of M-x compile,bash-completion-dynamic-complete creates a separate bash processjust for doing completion. Such processes have the environmentvariable EMACS_BASH_COMPLETE set to t, to help distinguish themfrom normal shell processes.

Completion at point

Additionally, you can enable bash completion in any buffer that contains bashcommands. To do that, call

(bash-completion-dynamic-complete-nocomint COMP-START COMP-POS DYNAMIC-TABLE)

from a function added to completion-at-point-functions.

The trickiest part is setting COMP-START to where the bash command starts;It depends on the mode of the calling buffer and might, in some cases, spanmultiple lines.

COMP-POS is usually the current position of the cursor.

When calling from completion-at-point, make sure to pass a non-nil valueto the DYNAMIC-TABLE argument so it returns a function instead of a listof strings. This isn't just an optimization: returning a function insteadof a list tells Emacs it should avoids post-filtering the results andpossibly discarding useful completion from bash.

For example, here's a function to to do bash completion from aneshell buffer. To try it out, add the function below to your init fileand bind bash-completion-from-eshell to a custom shortcut.

(defun bash-completion-from-eshell ()
  (interactive)
  (let ((completion-at-point-functions
         '(bash-completion-eshell-capf)))
    (completion-at-point)))

(defun bash-completion-eshell-capf ()
  (bash-completion-dynamic-complete-nocomint
   (save-excursion (eshell-bol) (point))
   (point) t))

TROUBLESHOOTING

If completion in a bash shell doesn't behave as you think it should, checkthe following:

Does bash behave differently when run outside of Emacs? If not, checkyour shell configuration.
Did you start a new bash process, with exec bash or sudo ? If yes,call bash-completion-refresh to configure the new bash process.
Call M-x bash-completion-debug and look at the completion tableat the bottom. Does it match your expectation? If not, callM-x bash-completion-refresh to refresh the copy of the completiontable kept by Emacs, or if you're in a M-x execute or M-x compileprompt, call M-x bash-completion-reset-all, then try again.
Still on M-x bash-completion-debug, does the output-buffer sectionmatch the expected set of completion? If yes, it might be a displayproblem. Are you using a completion engine other than the default,such as ivy or helm? Try turning it off to confirm, then filea bug
If all else fails, file a bug. Please include the outputof M-x bash-completion-debug, the command you're trying to useand the function or package providing completion for that command andwhere to download it.

CONTRIBUTING

To report bugs, features or even to ask questions, please open an issue. To contribute code or documentation, please open a pull request.

See CONTRIBUTING.md for more details.

COMPATIBILITY

bash-completion.el is known to work with Bash 3, 4 and 5, on Emacs,starting with version 24.3, under Linux and OSX. It does not work onXEmacs.

使用案例

在emacs中运行shell命令

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emacs-bash-completion

bash-completion for Emacs

INSTALLATION

Shell completion

Completion at point

TROUBLESHOOTING

CONTRIBUTING

COMPATIBILITY

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