[tracker] cli: Improve bash completion script

[Carlos Garnacho <carlosg src gnome org>]

commit 56569070dab3aaa2b2ab65367b7f6c2e984b2430
Author: Carlos Garnacho <carlosg gnome org>
Date:   Sun Jul 5 17:04:20 2015 +0200

    cli: Improve bash completion script
    
    We now autocomplete files where it applies (various -f/--file options,
    tracker info) and '-' prefixed switches.

 src/tracker/bash-completion/tracker |   36 ++++++++++++++++++++++++++++++++--
 1 files changed, 33 insertions(+), 3 deletions(-)
---
diff --git a/src/tracker/bash-completion/tracker b/src/tracker/bash-completion/tracker
index 8022b6a..12749cd 100644
--- a/src/tracker/bash-completion/tracker
+++ b/src/tracker/bash-completion/tracker
@@ -2,9 +2,39 @@
 
 tracker_cmds()
 {
-    possible=`tracker | egrep "   [a-z].*   " | awk '{ print ($1) }'`
-    local cur=${COMP_WORDS[COMP_CWORD]}
-    COMPREPLY=( $(compgen -W "$possible" -- $cur) )
+    local cur prev words cword
+    _init_completion -s || return
+
+    cur=${COMP_WORDS[COMP_CWORD]}
+
+    if [[ $cword == 1 ]]; then
+       possible=`tracker | egrep "   [a-z].*   " | awk '{ print ($1) }'`
+       COMPREPLY=( $(compgen -W "$possible" -- $cur) )
+       return 0;
+    fi
+
+    case $prev in
+       -h|--help)
+           return 0;
+           ;;
+       info|-f|--file)
+           if [[ $cur != -* ]]; then
+               _filedir
+               return 0;
+           fi
+           ;;
+       *)
+           ;;
+    esac
+
+    if [[ $cword -lt 2 ]]; then
+       return 0;
+    fi
+
+    if [[ -z $cur ]] || [[ $cur == -* ]]; then
+       possible=`${words[0]} ${words[1]} -h | egrep "^ *-" | sed "s/^ *//" | sed "s/  [^-].*//" | sed 
"s/,/\n/g" | sed "s/=.*//"`
+       COMPREPLY=( $(compgen -W "$possible" -- $cur) )
+    fi
 }
 
 complete -F tracker_cmds tracker