Scripts/Inject-ArmContent.ps1
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<# Possible injection instructions in ARM templates or recursively referenced files: ${ fileToInject.xml } ${ FileToInject=file.xml } ${ FileToInject = ".\Parent Directory\file.xml" } ${ FileToInject = ".\Parent Directory\file.xml", EscapeJson, ReplaceSpecialChars } ${ FileToInject = '.\Parent Directory\file.json', InjectAsJsonObject } #> param ( [string] $Path = $PSScriptRoot ) function InjectFile { param( [string] $filePath ) Write-Host "Checking file $filePath" $replaceContentDelegate = { param($match) $completeInjectionInstruction = $match.Groups[1].Value; $instructionParts = @($completeInjectionInstruction -split "," | foreach { $_.Trim() } ) $filePart = $instructionParts[0]; # Regex uses non-capturing group for 'FileToInject' part, # afterwards character classes and backreferencing to select the optional single or double quotes $fileToInjectPathRegex = [regex] "^(?:FileToInject\s*=\s*)?([`"`']?)(?<File>.*?)\1?$"; $fileMatch = $fileToInjectPathRegex.Match($filePart) if ($fileMatch.Success -ne $True){ throw "The file part '$filePart' of the injection instruction could not be parsed correctly" } $relativePathOfFileToInject = $fileMatch.Groups["File"]; $fullPathOfFileToInject = Join-Path (Split-Path $filePath -Parent) $relativePathOfFileToInject $fileToInjectIsFound = Test-Path -Path $fullPathOfFileToInject -PathType Leaf if ($false -eq $fileToInjectIsFound) { throw "No file can be found at '$fullPathofFileToInject'" } # Inject content recursively first InjectFile($fullPathOfFileToInject) Write-Host "`t Injecting content of $fullPathOfFileToInject into $filePath" $newString = Get-Content -Path $fullPathOfFileToInject -Raw # XML declaration can only appear on the first line of an XML document, so remove when injecting $newString = $newString -replace '(<\?xml).+(\?>)(\r)?(\n)?', "" # By default: retain double quotes around content-to-inject, if present $surroundContentWithDoubleQuotes = $match.Value.StartsWith('"') -and $match.Value.EndsWith('"') if ($instructionParts.Length -gt 1) { $optionParts = $instructionParts | select -Skip 1 if ($optionParts.Contains("ReplaceSpecialChars")){ Write-Host "`t Replacing special characters" # Replace newline characters with literal equivalents $newString = $newString -replace "`r`n", "\r\n" # Replace tabs with spaces $newString = $newString -replace "`t", " " # Replace " with \" $newString = $newString -replace """", "\""" } if ($optionParts.Contains("EscapeJson")) { Write-Host "`t JSON-escaping file content" # Use regex negative lookbehind to replace double quotes not preceded by a backslash with escaped quotes $newString = $newString -replace '(?<!\\)"', '\"' } if ($optionParts.Contains("InjectAsJsonObject")){ try{ # Test if content is valid JSON ConvertFrom-Json $newString $surroundContentWithDoubleQuotes = $False } catch{ Write-Error "Content to inject cannot be parsed as a JSON object!" } } } if ($surroundContentWithDoubleQuotes){ Write-Host "`t Surrounding content in double quotes" $newString = '"' + $newString + '"' } return $newString; } $rawContents = Get-Content $filePath -Raw $injectionInstructionRegex = [regex] '"?\${(.+)}\$"?'; $injectionInstructionRegex.Replace($rawContents, $replaceContentDelegate) | Set-Content $filePath -Encoding UTF8 Write-Host "Done checking file $filePath" } $psScriptFileName = $MyInvocation.MyCommand.Name $PathIsFound = Test-Path -Path $Path if ($false -eq $PathIsFound) { throw "Passed allong path '$Path' doesn't point to valid file path" } Write-Host "Starting $psScriptFileName script on path $Path" $armTemplates = Get-ChildItem -Path $Path -Recurse -Include *.json $armTemplates | ForEach-Object { InjectFile($_.FullName) } Write-Host "Finished script $psScriptFileName" |