Where is `_init_completion` defined?

Question

I'm on Manjaro Linux.

I'm trying to customize my bash completion but most of the completions I've got (in /usr/share/bash-completion/completions/ & from github have a line like _init_completion || return. However, upon trying _<TAB>, there is no _init_completion function, and I can't find it in any of my completion files.

This _init_completion seems to be used by most bash completion scripts but doesn't seem to be defined anywhere. Googling "bash _init_completion" doesn't return a clear result with a file defining the function either.

Where can I get the _init_completion function?

Answer 1

At least on my Debian 10 system, it is defined in /usr/share/bash-completion/bash_completion, and sourced from there by /etc/profile.d/bash_completion.sh, which is in turn sourced by /etc/profile.

Those files are provided in Debian by a separate bash-completion package. Its upstream source is the very same Github repository you linked, not in the completions sub-directory but at the top level of the repository.