./symfony | perl symfony_competion_generate.pl > /etc/bash_completion.d/symfony

symfony_completion_generate.pl

#!/usr/bin/perl

use strict;
use warnings;

my ($first, @cmd);
while ( <> ) {
  if ( /^([a-zA-Z0-9\-]+)/ ) {
    $first = $1;
  } elsif ( /^\s*(:[a-zA-Z0-9\-]+)/ ) {
    push @cmd, "$first$1";
  }
}

while ( <DATA> ) {
  my $cmd = join(' ', @cmd);
  $_ =~ s/__CMD/$cmd/;
  print $_;
}

#print `./symfony | perl -ne 'if( /^([a-zA-Z0-9\-]+)/ ) { $first = $1; } elsif ( /^\s*(:[a-zA-Z0-9\-]+)/ ) { print $first . $1 . "\n"; }'`

__DATA__
# Bash symfony completion
#
_symfony()
{
    local cmds cur colonprefixes

    # cmds="$( ${COMP_WORDS[0]} | perl -ne 'if( /^([a-zA-Z0-9\-]+)/ ) { $first = $1; } elsif ( /^\s*(:[a-zA-Z0-9\-]+)/ ) { print $first . $1 . "\n"; }' )"
    cmds="__CMD__"
    COMPREPLY=()
    cur=${COMP_WORDS[COMP_CWORD]}
    # Work-around bash_completion issue where bash interprets a colon as a separator.
    # Work-around borrowed from the darcs work-around for the same issue.
    colonprefixes=${cur%"${cur##*:}"}
    COMPREPLY=( $(compgen -W '$cmds'  -- $cur))
    local i=${#COMPREPLY[*]}
    while [ $((--i)) -ge 0 ]; do
        COMPREPLY[$i]=${COMPREPLY[$i]#"$colonprefixes"} 
    done

    return 0
} &&
complete -F _symfony symfony