added Set-DescriptionFromReadme

AU/Public/Set-DescriptionFromReadme.ps1

@@ -0,0 +1,35 @@
+<#
+.SYNOPSIS
+  Updates nuspec file description from README.md
+
+.DESCRIPTION
+  This script should be called in au_AfterUpdate to put the text in the README.md
+  into description tag of the Nuspec file. The current description will be replaced.
+  Function will throw an error if README.md is not found.
+
+.PARAMETER SkipFirst
+  Number of start lines to skip from the README.md, by default 0.
+
+
+.PARAMETER SkipLast
+  Number of end lines to skip from the README.md, by default 0.
+
+.EXAMPLE
+  function global:au_AfterUpdate  { Set-DescriptionFromReadme -SkipFirst 2 }
+#>
+function Set-DescriptionFromReadme([int]$SkipFirst=0, [int]$SkipLast=0) {
+    if (!(Test-Path README.md)) { throw 'Set-DescriptionFromReadme: README.md not found' }
+
+    Write-Host 'Setting README.md to Nuspec description tag'
+    $description = gc README.md -Encoding UTF8
+    $endIdx = $description.Length - $SkipLast
+    $description = $description | select -Index ($SkipFirst..$endIdx) | Out-String
+
+    $nuspecFileName = $Latest.PackageName + ".nuspec"
+    $nu = gc $nuspecFileName -Raw -Encoding UTF8
+    $nu = $nu -replace "(?smi)(\<description\>).*?(\</description\>)", "`${1}$($description)`$2"
+
+    $Utf8NoBomEncoding = New-Object System.Text.UTF8Encoding($False)
+    $NuPath = (Resolve-Path $NuspecFileName)
+    [System.IO.File]::WriteAllText($NuPath, $nu, $Utf8NoBomEncoding)
+}

CHANGELOG.md

@@ -1,5 +1,9 @@
 # AU Project Changelog
 
+## Next
+
+- Added new function `Set-DescriptionFromReadme`.
+
 ## 2017.8.30
 
 - `Update-AUPackages` 

README.md

@@ -14,6 +14,7 @@ To see AU in action see [video tutorial](https://www.youtube.com/watch?v=m2XpV2L
 - Use only PowerShell to create automatic update script for given package.
 - Automatically downloads installers and provides/verifies checksums for x32 and x64 versions.
 - Verifies URLs, nuspec versions, remote repository existence etc.
+- Keep nuspec descriptions in README.md files.
 - Can use global variables to change functionality.
 - Sugar functions for Chocolatey package maintainers.
 - Update single package or any subset of previously created AU packages with a single command.