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}
65complete -F _clang clang
66