bash completion for ./yii command options

contrib/completion/bash/yii

@@ -12,21 +12,47 @@
 
 _yii()
 {
-    local cur opts yii
+    local cur opts yii command
     COMPREPLY=()
     cur="${COMP_WORDS[COMP_CWORD]}"
     yii="${COMP_WORDS[0]}"
 
-    # only complete first argument
-    if [[ COMP_CWORD -eq 1 ]] ; then
-        # fetch available commands from ./yii help/list command
-        opts=$($yii help/list)
-        # generate completion suggestions
-        COMPREPLY=( $(compgen -W "${opts}" -- ${cur}) )
-        return 0
-    fi
+    # exit if ./yii does not exist
+    test -f $yii || return 0
+
+    # lookup for command
+    for word in ${COMP_WORDS[@]:1}; do
+        if [[ $word != -* ]]; then
+            command=$word
+            break
+        fi
+    done
+
+    [[ $cur == $command ]] && state="command"
+    [[ $cur != $command ]] && state="option"
+    [[ $cur = *=* ]] && state="value"
+
+    case $state in
+        command)
+            # complete command/route if not given
+            # fetch available commands from ./yii help/list command
+            opts=$($yii help/list 2> /dev/null)
+        ;;
+        option)
+            # fetch available options from ./yii help/list-action-options command
+            opts=$($yii help/list-action-options $command 2> /dev/null | grep -o '^--[a-zA-Z0-9]*')
+        ;;
+        value)
+            # TODO allow normal file completion after an option, e.g. --migrationPath=...
+        ;;
+    esac
+
+    # generate completion suggestions
+    COMPREPLY=( $(compgen -W "${opts}" -- ${cur}) )
+    return 0
+
 }
 
 # register completion for the ./yii command
 # you may adjust this line if your command file is named differently
-complete -F _yii ./yii
+complete -F _yii ./yii yii