[Bug 1394920] [NEW] Filename completion not working if current directory does not match with COMPREPLY array

[hakon]

Public bug reported:

I am trying to ignore certain directory names when using bash
completion. For example to ignore "backup" directories I use

$ cat setup.sh
_compTest() {
    local curdir cur words val name
    cur="${COMP_WORDS[$COMP_CWORD]}"
    baseFolder="."
    curdir=$PWD
    cd "$baseFolder"
    words=( $(compgen -f "$cur") )
    COMPREPLY=()
    for val in "${words[@]}" ; do
        name=$(basename "$val")
        if [[ $name == "backup" ]] ; then
            continue
        fi
        COMPREPLY+=( "$val" )
    done
    cd "$curdir"
}
complete -o filenames -F _compTest aaa


After sourcing this:

$ . setup.sh

I can type

$ aaa <tab><tab>

and it works fine. However if I use another baseFolder, for example
setting

baseFolder="$HOME/base"

in the above script (setup.sh) (where $HOME/base is different from the
current directory) the completion list is no longer what I would expect.
That is:

* slashes are missing at the end of directory names, and
* a space is added after each completed directory name, instead of a slash ("/")


$ lsb_release -rd
Description:	Ubuntu 14.04.1 LTS
Release:	14.04


$ apt-cache policy bash-completion
bash-completion:
  Installed: 1:2.1-4
  Candidate: 1:2.1-4
  Version table:
 *** 1:2.1-4 0
        500 http://no.archive.ubuntu.com/ubuntu/ trusty/main i386 Packages
        100 /var/lib/dpkg/status

** Affects: bash-completion (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1394920

Title:
  Filename completion not working if current directory does not match
  with COMPREPLY array

Status in “bash-completion” package in Ubuntu:
  New

Bug description:
  I am trying to ignore certain directory names when using bash
  completion. For example to ignore "backup" directories I use

  $ cat setup.sh
  _compTest() {
      local curdir cur words val name
      cur="${COMP_WORDS[$COMP_CWORD]}"
      baseFolder="."
      curdir=$PWD
      cd "$baseFolder"
      words=( $(compgen -f "$cur") )
      COMPREPLY=()
      for val in "${words[@]}" ; do
          name=$(basename "$val")
          if [[ $name == "backup" ]] ; then
              continue
          fi
          COMPREPLY+=( "$val" )
      done
      cd "$curdir"
  }
  complete -o filenames -F _compTest aaa

  
  After sourcing this:

  $ . setup.sh

  I can type

  $ aaa <tab><tab>

  and it works fine. However if I use another baseFolder, for example
  setting

  baseFolder="$HOME/base"

  in the above script (setup.sh) (where $HOME/base is different from the
  current directory) the completion list is no longer what I would
  expect. That is:

  * slashes are missing at the end of directory names, and
  * a space is added after each completed directory name, instead of a slash ("/")

  
  $ lsb_release -rd
  Description:	Ubuntu 14.04.1 LTS
  Release:	14.04

  
  $ apt-cache policy bash-completion
  bash-completion:
    Installed: 1:2.1-4
    Candidate: 1:2.1-4
    Version table:
   *** 1:2.1-4 0
          500 http://no.archive.ubuntu.com/ubuntu/ trusty/main i386 Packages
          100 /var/lib/dpkg/status

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