added cinst-gh.ps1

cinst-gh.ps1

@@ -0,0 +1,28 @@
+<# Installs package directly from Github repository
+   To use with your own repo: 
+     - Set the path to your packages root in $Repo
+     - Create short link to this raw github script via for example goo.gl
+     - Commit nupkg files in the repository along with the package source code
+    
+   Usage:
+     - Pass repository package name as a first argument
+     - Pass any cinst option after that (some may not work ofc. such as `version`)
+
+   Example: 
+     iwr https://goo.gl/SZ9c3m | iex; cinst-gh furmark --force
+#>
+function cinst-gh {
+    $Repo = "https://github.com/majkinetor/au-packages/tree/master" 
+
+    $name = $args[0]
+    $download_page = iwr $Repo/$name -UseBasicParsing
+    $url = $download_page.Links.href -like '*.nupkg'
+    $p = $url -split '/' | select -last 1
+    
+    $raw = $Repo -replace 'github.com', 'rawgit.com' -replace 'tree/'
+    iwr "$raw/$(($p -split '\.')[0])/$p" -Out $p
+    $a = $args | select -Skip 1
+    $cmd = "cinst $p $a"
+    Write-Host $cmd; iex $cmd
+    rm $p
+}