clang/utils/bash-autocomplete.sh

   1 # Please add "source /path/to/bash-autocomplete.sh" to your .bashrc to use this.
   2
   3 _clang_filedir()
   4 {
   5   # _filedir function provided by recent versions of bash-completion package is
   6   # better than "compgen -f" because the former honors spaces in pathnames while
   7   # the latter doesn't. So we use compgen only when _filedir is not provided.
   8   _filedir 2> /dev/null || COMPREPLY=( $( compgen -f ) )
   9 }
  10
  11 _clang()
  12 {
  13   local cur prev words cword arg flags w1 w2
  14   # If latest bash-completion is not supported just initialize COMPREPLY and
  15   # initialize variables by setting manually.
  16   _init_completion -n 2> /dev/null
  17   if [[ "$?" != 0 ]]; then
  18     COMPREPLY=()
  19     cword=$COMP_CWORD
  20     cur="${COMP_WORDS[$cword]}"
  21   fi
  22
  23   w1="${COMP_WORDS[$cword - 1]}"
  24   if [[ $cword > 1 ]]; then
  25     w2="${COMP_WORDS[$cword - 2]}"
  26   fi
  27
  28   # Pass all the current command-line flags to clang, so that clang can handle
  29   # these internally.
  30   # '=' is separated differently by bash, so we have to concat them without ','
  31   for i in `seq 1 $cword`; do
  32     if [[ $i == $cword || "${COMP_WORDS[$(($i+1))]}" == '=' ]]; then
  33       arg="$arg${COMP_WORDS[$i]}"
  34     else
  35       arg="$arg${COMP_WORDS[$i]},"
  36     fi
  37   done
  38
  39   # expand ~ to $HOME
  40   eval local path=${COMP_WORDS[0]}
  41   # Use $'\t' so that bash expands the \t for older versions of sed.
  42   flags=$( "$path" --autocomplete="$arg" 2>/dev/null | sed -e $'s/\t.*//' )
  43   # If clang is old that it does not support --autocomplete,
  44   # fall back to the filename completion.
  45   if [[ "$?" != 0 ]]; then
  46     _clang_filedir
  47     return
  48   fi
  49
  50   # When clang does not emit any possible autocompletion, or user pushed tab after " ",
  51   # just autocomplete files.
  52   if [[ "$flags" == "$(echo -e '\n')" ]]; then
  53     # If -foo=<tab> and there was no possible values, autocomplete files.
  54     [[ "$cur" == '=' || "$cur" == -*= ]] && cur=""
  55     _clang_filedir
  56   elif [[ "$cur" == '=' ]]; then
  57     COMPREPLY=( $( compgen -W "$flags" -- "") )
  58   else
  59     # Bash automatically appends a space after '=' by default.
  60     # Disable it so that it works nicely for options in the form of -foo=bar.
  61     [[ "${flags: -1}" == '=' ]] && compopt -o nospace 2> /dev/null
  62     COMPREPLY=( $( compgen -W "$flags" -- "$cur" ) )
  63   fi
  64 }
  65 complete -F _clang clang