jekyll.ps1

function Add-Post {
  param (
    [parameter(Mandatory=$true, Position=0)][string]$post,
    [parameter(Mandatory=$false, Position=1)][switch]$draft
  )
 
  if(!(Assert-IsGitRepo)) {
    throw 'you are currently not in a git repository.'
  }   
  
  push-location "$(git rev-parse --show-toplevel)"
 
  $current_datetime = get-date
  $current_date = $current_datetime.ToString("yyyy-MM-dd")
  $current_time = $current_datetime.ToString("HH:mm:ss")
  $url_title = parameterize($post)
  $filename = "{0}-{1}.md" -f $current_date, $url_title
   
  # the target dir is either _drafts or _posts based on the $draft flag set by the user.
  $dir = if($draft.IsPresent){ "_drafts" } else { "_posts" }
 
  # Jekyll and Pretzel stores posts in a _posts directory,
  # therefore we have to make sure this directory exists.
  if (-not (test-path $dir)) {
    new-item -itemtype directory $dir
  }
   
  $path = "$dir/{0}" -f $filename
   
  # Add the default YAML Front Matter at the top of the file.
@"
--- 
layout: post
title: $post 
date: $current_date $current_time
categories: []
tags: []
---
"@ > $path
 
  # Force UTF-8 Encoding
  $MyFile = Get-Content $path
  $Utf8NoBomEncoding = New-Object System.Text.UTF8Encoding($False)
  [System.IO.File]::WriteAllLines($path, $MyFile, $Utf8NoBomEncoding)
 
  pop-location
}
Set-Alias post Add-Post
 
function parameterize($title) {
  $parameterized_title = $title.ToLower()
  $words = $parameterized_title.Split()
  $normalized_words = @()
  
  foreach ($word in $words) {
    # Convert a Unicode string into its ASCII counterpart, e.g. māja -> maja.
    $normalized_word = $word.Normalize([Text.NormalizationForm]::FormD)
    
    # Normalize method returns ASCII letters together with a symbol that "matches"
    # the diacritical mark used in the Unicode. These symbols have to be removed
    # in order to get a valid string.
    $normalized_words += $normalized_word -replace "[^a-z0-9]", [String]::Empty
  }
  
  $normalized_words -join "-"
}
 
function Assert-IsGitRepo {
  try {
    git status
    return $true
  } catch {
    return $false
  }
}

personal.psm1

if (Get-Module personal) { return }

Push-Location $psScriptRoot

. .\jekyll.ps1

Pop-Location

Export-ModuleMember `
    -Alias @(
        '*') `
    -Function @('Add-Post')