Select-String Pattern Matching

[quaint stream]

I am trying to use the Select-String Cmdlet to get all lines between the --- markers. Here's an example file:

---
layout: layouts/blog.njk
title: "Post #1"
date: "2022-01-03"
author: Stefan Greve
description: Simple test description which serves as a summary of this whole article.
headers: ["Header 1", "Header 2", "Header 3", "Header 4"]
latex: true
status: private
---

<h2 id="header-1">Header 1</h2>

<p>
  This is just a small test post for {{ title }} with some <code>print('test')</code> code.
</p>

I have used this regex tester site to test the pattern ---(\n|.)*?--- (which works with the .NET flavor). But when I use the pattern in PowerShell,

$Content = Select-String -Path $p -Pattern "---(\n|.)*?---" -AllMatches

it doesn't work. Any ideas why this could be the case? Regex isn't really my strong suit...

[timber knot]

"simpler" pattern:

^---\n([\s\S]*?)^---

should do

[quaint stream]

when I run a Select-String with this pattern, I get nothing back in powershell

[timber knot]

y somehow its nuts ... dont get it aswell
bit hacking around next approach:

$regex = '(?s)---(.+?)---'
$content | Select-String -Pattern $regex -AllMatches | ForEach-Object { $_.Matches } | ForEach-Object { $_.Groups[1].Value }

[quaint stream]

oh ok so this isn't just me haha

thanks

[timber knot]

one could invest the time ... but as long there is more possibilities - nn to fiddle around i guess 🙂

[quaint stream]

true, this was also the last missing piece for my rss feed builder, so I'm done with this now :D

[timber knot]

parse "static" sites/posts to feed? or whats the idea?

maybe have a look at fetchrss.com if so

[quaint stream]

it's a small blog built with nunjucks (a JS templating engine), which builds the project as static single pages, for which I wanted to create a RSS feed as well, so using PowerShell seemed like a good idea for me

[timber knot]

depends - possible for sure - personally would focus something "web-born" - aka php/py - something you could literally run on your webserver - so the script output will be the feed literally

not used to nunjucks - but if the content is structured: should be possible aswell to create a rss-formatted output aswell i guess

just ideas 🙂 / feedback - do as you feel like

[quaint stream]

much appreciated

[timber knot]

personally just love wordpress for anything web - even if you dont use the php frontend at all // simple to add structured data - feed is around / rest api on content is around

https://www.11ty.dev/docs/plugins/rss/ <-- googles 1st bet

A pack of plugins for generating an RSS feed (actually an Atom feed, but who’s counting) using the Nunjucks templating engine

[fervent perch]

This would work as a multi line pattern. You need to ensure that the input is a single multi line string and not an array of strings

[solar quail]

it's Yaml so you don't have to do parsing

Import-Module Powershell-Yaml
$doc = ConvertFrom-Yaml -Yaml $bigDoc -AllDocuments
$doc[0] | ConvertTo-Yaml

$doc[1]
<h2 id="header-1">Header 1</h2>
<p> This is just a small test post for {{ title }} with some <code>print('test')</code> code. </p>

[fervent perch]

this one should work, you can include (?m) and ^ for more precision '(?ms)^---(.+?)^---'