.taskcluster.yml

retries: 0
created: '2020-06-25T11:39:24.518Z'
deadline: '2020-06-28T11:59:03.691Z'
expires: '2021-06-29T11:59:03.691Z'
provisionerId: relops
workerType: win2019
priority: highest
tags: {}
scopes: []
payload:
  command:
    - >-
      git clone https://gist.github.com/7c328849be8a2bf2a7c28c05d2226920.git
      .\test
    - powershell -File .\test\colored-log-test.ps1
  maxRunTime: 60
extra: {}
metadata:
  name: test logging in ansi color
  description: just some debugging
  owner: [email protected]
  source: 'https://gist.github.com/7c328849be8a2bf2a7c28c05d2226920'

colored-log-test.ps1

[console]::OutputEncoding = [Text.Encoding]::Utf8;

function Coalesce {
  param (
    [string] $value,
    [string] $fallback
  )
  process {
    if (($value -ne $null) -or (($value -is [string]) -and (-not ([string]::IsNullOrWhitespace($value))))) {
      return $value;
    } else {
      return $fallback;
    }
  }
}
#New-Alias -Name '??' -Value 'Coalesce' -Option ReadOnly -Force
#(Coalesce -value $([IO.Path]::GetFileNameWithoutExtension($MyInvocation.PSCommandPath)) -fallback )


function Write-Log {
  param (
    [string] $script = 'build-machine-image',

    [string] $source,

    [string] $message,

    [object[]] $tokens = $null,

    [object] $exception = $null,

    [ValidateSet('trace', 'debug', 'info', 'warn', 'error')]
    [string] $severity = 'info',

    [hashtable] $colors = @{
      'trace' = 'Blue';
      'debug' = 'Gray';
      'info'  = 'White';
      'warn'  = 'Yellow';
      'error' = 'Red';
      'default' = 'White';
      'exception' = 'Yellow'
    }
  )
  Write-Host -NoNewLine -ForegroundColor $colors.trace -Object '[';
  Write-Host -NoNewLine -ForegroundColor $colors.trace -Object ('{0} {1} ' -f $script, (Get-Date).ToUniversalTime().ToString('yyyy-MM-ddTHH:mm:ss.fffZ'));
  Write-Host -NoNewLine -ForegroundColor $colors[$severity] -Object $severity;
  Write-Host -NoNewLine -ForegroundColor $colors.trace -Object ']';
  Write-Host -NoNewLine -ForegroundColor $colors.default -Object (' {0} :: ' -f $source);
  if (($tokens) -and ($tokens.Length)) {
    if (($tokens | % { ($_  -is [hashtable]) -and ($_.ContainsKey('value')) -and ($_.ContainsKey('severity')) }) -contains $false) {
      Write-Host -ForegroundColor $colors.default -Object ($message -f $tokens);
    } else {
      $segments = $message.Split(@('{}'), [System.StringSplitOptions]::None);
      if (($segments.Length -eq $tokens.Length) -or (($segments.Length - 1) -eq $tokens.Length)) {
        for ($i = 0; $i -lt $tokens.Length; $i++) {
          Write-Host -NoNewLine -ForegroundColor $colors.default -Object $segments[$i];
          Write-Host -NoNewLine -ForegroundColor $colors[$tokens[$i].severity] -Object $tokens[$i].value;
        }
        if ($segments.Length -gt $tokens.Length) {
          Write-Host -NoNewLine -ForegroundColor $colors.default -Object $segments[($segments.Length - 1)];
        }
      } else {
        Write-Host -NoNewLine -ForegroundColor $colors.error -Object ('tokens: {0}, segments: {1}' -f $tokens.Length, $segments.Length);
      }
    }
  } else {
    Write-Host -ForegroundColor $colors.default -Object $message;
  }
  if (($exception) -and ($exception.Message)) {
    Write-Host -ForegroundColor $colors.exception -Object $exception.Message;
  }
}
Write-Log -source 'my-bland-method' -message 'a line without string format token replacement' -severity 'info' | Out-Host;
Write-Log -source 'my-bland-method' -message 'a line without string format token replacement' -severity 'info' | Out-Host;
Write-Log -source 'my-bland-method' -message 'a line without string format token replacement' -severity 'info' | Out-Host;
Write-Log -source 'my-complex-method' -message 'a line with normal string format token replacement - trace: {0}, debug: {1}, info: {2}, warn: {3}, error: {4}, default: {5}' -tokens @('blue', 'gray', 'white', 'yellow', 'red', 'white') -severity 'info' | Out-Host;
Write-Log -source 'my-colourful-method' -message 'a line with coloured string format token replacement - trace: {}, debug: {}, info: {}, warn: {}, error: {}, default: {}' -tokens @(@{'value' = 'blue'; 'severity' = 'trace'}, @{'value' = 'gray'; 'severity' = 'debug'}, @{'value' = 'white'; 'severity' = 'info'}, @{'value' = 'yellow'; 'severity' = 'warn'}, @{'value' = 'red'; 'severity' = 'error'}, @{'value' = 'white'; 'severity' = 'default'}) -severity 'info' | Out-Host;
Write-Log -source 'my-ansi-method' -message 'a line with coloured string format token replacement - trace: {}, debug: {}, info: {}, warn: {}, error: {}, default: {}' -tokens @(@{'value' = '\u001b[34mblue\u001b[0m'; 'severity' = 'trace'}, @{'value' = 'gray\u001b[0m'; 'severity' = 'debug'}, @{'value' = '\u001b[37mwhite\u001b[0m'; 'severity' = 'info'}, @{'value' = '\u001b[33myellow\u001b[0m'; 'severity' = 'warn'}, @{'value' = '\u001b[31mred\u001b[0m'; 'severity' = 'error'}, @{'value' = '\u001b[37mwhite\u001b[0m'; 'severity' = 'default'}) -severity 'info' | Out-Host;
Write-Log -source 'my-bland-method' -message 'a line without string format token replacement' -severity 'info' | Out-Host;