等于之后的Bash完成在Ubuntu上不起作用

Question

On my Ubuntu 14.04.3 machine with enabled bash completion (through . /etc/bash_completion in ~/.bashrc), I do not get directory-content completion for cmd --param=<TAB> , ie, nothing is happening when pressing . When I start a pristine bash (eg through env -i bash --norc ), it works as expected -- but then no programmable completion is available. I found Bash completion for path in argument (with equals sign present) which talks about a similar issue but 1) the respective npm script is not existing on my machine and 2) even removing all files from /etc/bash_completion.d does not fix the problem. What can I do to get proper completion?

I found one halfhearted fix by running complete -r -D which prevents bash from trying to complete new commands. This enables completion after equals again, but stops completion, for example, for killall.

Answer 1

While I do not understand what you mean by "stops completion after killall", I believe there is a workaround.

I found it here . It involves overriding a broken bash completion function. Copy-pasting here for the record. The workaround is to add the following to your .bashrc :

_completion_loader () {
  local dir=/usr/share/bash-completion/completions
  local cmd="${1##*/}"
  . "${dir}/${cmd}" &>/dev/null && return 124
  complete -o default -o bashdefault "${cmd}" &>/dev/null && return 124
}

I am uncertain whether the actual reported bug is fixed in bash: the comments in the bug report are unclear and mention a couple more problems. For the record, my bash is version 4.2.46(1)-release (Redhat EL 7) which does have this bug.