Refactor subcommand handling

GitTabExpansion.ps1

@@ -5,15 +5,15 @@ $global:GitTabSettings = New-Object PSObject -Property @{
     AllCommands = $false
 }
 
-$global:ops = @{
-    reflog = 'expire','delete','show'
-    remote = 'add','rename','rm','set-head','show','prune','update'
-    stash = 'list','show','drop','pop','apply','branch','save','clear','create'
-    svn = 'init', 'fetch', 'clone', 'rebase', 'dcommit', 'branch', 'tag', 'log', 'blame', 'find-rev', 'set-tree', 'create-ignore', 'show-ignore', 'mkdirs', 'commit-diff', 'info', 'proplist', 'propget', 'show-externals', 'gc', 'reset'
+$subcommands = @{
+    reflog = 'expire delete show'
+    remote = 'add rename rm set-head show prune update'
+    stash = 'list show drop pop apply branch save clear create'
+    svn = 'init fetch clone rebase dcommit branch tag log blame find-rev set-tree create-ignore show-ignore mkdirs commit-diff info proplist propget show-externals gc reset'
 }
 
 function script:gitCmdOperations($command, $filter) {
-    $ops.$command |
+    $subcommands.$command -split ' ' |
         where { $_ -like "$filter*" }
 }
 
@@ -121,7 +121,7 @@ function GitTabExpansion($lastBlock) {
         # Handles git remote <op>
         # Handles git stash <op>
         # Handles git svn <op>
-        "^(?<cmd>reflog|remote|stash|svn)\s+(?<op>\S*)$" {
+        "^(?<cmd>$($subcommands.Keys -join '|'))\s+(?<op>\S*)$" {
             gitCmdOperations $matches['cmd'] $matches['op']
         }