Parse YAML file in Powershell

Question

I want to parse an YAML file from IBM API Connect in a PowerShell file. I won't be able to put third party packages or DLLs since security review won't agree with it.

---
product: "1.0.0"
info:
  name: "api2product"
  title: "API2product"
  version: "1.0.0"
visibility:
  view:
    enabled: true
    type: "public"
    tags: []
    orgs: []
  subscribe:
    enabled: true
    type: "authenticated"
    tags: []
    orgs: []
apis:
  api1:
    $ref: "api1_1.0.0.yaml"
  api2:
    $ref: "api2_1.0.0.yaml"
  api3:
    $ref: "api3_1.0.0.yaml"
  api4:
    $ref: "api4_1.0.0.yaml"
  api5:
    $ref: "api5_1.0.0.yaml"
plans:
  default:
    title: "Default Plan"
    description: "Default Plan"
    approval: false
    rate-limit:
      hard-limit: false
      value: "100/hour"

I am interested to get only the API YAML files associated with it for which I have googled and developed a sample PowerShell code which is actually running.

$text = Get-Content -Path "C:\Users\abhi\Desktop\projects\TRYG\GitLab\APIPOC\test.yaml"
$regex = '(?ms)apis:(.+?)plans:'
$text = $text -join "`n"
$OutputText = [regex]::Matches($text, $regex) |
              foreach {$_.Groups[1].Value -split $regex}
$OutputText = $OutputText.Replace("`$ref:", "")
$OutputText = $OutputText.Replace(":", "=")
$OutputText = $OutputText.Replace("=`n", "=")
$OutputText = $OutputText.Replace("`"", "")
$AppProps = ConvertFrom-StringData ($OutputText)
$AppProps.GetEnumerator() | ForEach-Object {$_.Value}
[string[]]$l_array = $AppProps.Values | Out-String -Stream

Is there any simple way to achieve this instead of multiple replacements in the string?

Answer 1

I suggest you fork an open licensed module like the Phil-Factor/PSYaml as this isn't a trivial task.

Then you can keep an isolated version that you maintain your self.