创建制表符完成脚本。在一种情况下，我想使用完成另一个命令（例如git），是否可能？

Question

So I have some commands I am scripting up:

all-build.sh all-git.sh

These run commands on multiple folders and spawn output windows (running tail -f on logs) and all sorts of other things.

However I they each take different commands and I want tab completion

So I read a tutorial on tab completion and I have the all-completion.bash script as shown here:

#!/usr/bin/env bash

complete -W "param1 param2 param3" all-build.sh
complete -W "status log push pull" all-git.sh

As you can see the all-build auto complete params are my own custom ones and I am happy with that. However the git ones are a repeat of some of the actual git parameters. So really what I want is something like:

complete <use git completion> all-git.sh

So that when I do all-git submodule upd<tab> it auto completes to all-git submodule update using git's auto complete.

Is that possible?

Answer 1

We might use _completion_loader , (which is used to define completions on the fly ) in order to load git completions.

Then we might observe in official git-completion.sh file, that function used to complete git "submodules" is called _git , so we can simply pass it to complete via -F <function> option, see complete documentation .

So by writing

source /usr/share/bash-completion/bash_completion
_completion_loader git

complete -F _git all-git.sh

we can achieve desired behaviour (if I got your issue correctly).

Note : That bash_completion script, might be located on your machine in different folder. I've tested it on Ubuntu 16.04 with bash 4.3.48 .

EDIT : In case this doesn't fully solve your issue, I believe this is the way you want to go :). You can pretty much bend the solution for your needs.

EDIT-2 : I've also assumed, you have already installed and working git completions.

EDIT-3 : I've found a few interesting links, which are not solving your particular issue, but can give some light and deeper knowledge:

• Accessing tab-completion programmatically in Bash
• Perform tab-completion for aliases in Bash
• Accessing bash completions for specific commands programmatically

Answer 2

It's very simple:

source /usr/share/bash-completion/completions/git
__git_complete all-git.sh __git_main

The __git_complete() function is a helper to create Git completions, it's used by Git itself like this: __git_complete git __git_main . You can use it for specific commands, like __git_complete all-submodule.sh _git_submodule .

It's specifically designed for this, so no need to complicate it more.