[Bug 1394920] Re: complete -o filename can't be used with filenames relative to another directory to handle space vs. trailing /

[hakon]

Hi Peter, you were completely right! Now I have got some help at
stackoverflow, and it seems that helped solve this issue. There are four
things that seems must be in place to solve it:

1. compopt -o nospace
2. compopt -o filenames
3. Running compgen -f with an absolute path
4. Then postprocessing the results of compgen
  a) removing absoulte path prefix
  b) adding slashes after filenames

So here is minimal example (not handling quoting and spaces in file
names):

_compTest() {
    local cur tmp val
    cur="${COMP_WORDS[$COMP_CWORD]}"
    tmp=~/tmp/
    tmp_escaped=${tmp//\//\\\/}
    cur="$tmp$cur"    
    COMPREPLY=( $(compgen -f "$cur") )
    for ((i=0 ; i<${#COMPREPLY[@]}; i++ )) ; do
        val="${COMPREPLY[$i]}"
        [[ -d "$val" ]] && val="$val/"
        COMPREPLY[$i]="${val/$tmp_escaped/}"
    done    
}
complete -o filenames -o nospace -F _compTest aaa

Thanks again for excellent help!

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

Title:
  complete -o filename can't be used with filenames relative to another
  directory to handle  space vs. trailing /

Status in bash-completion package in Ubuntu:
  Opinion

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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