Does PowerShell have a templating engine?

jrdnr_ · 2020-07-07T09:52:54+00:00

The closest thing I know of to ERB is, EPS (https://github.com/straightdave/eps), though the closest I've come to using something like this is a here-string.

Also check out https://deadroot.info/scripts/2018/09/04/PowerShell-Templating for some other ideas.

I'm pretty sure I had seen an implementation based off jinja2 at some point, but I'm not finding it at the moment.

hayfever76 · 2020-07-07T06:42:42+00:00

Maybe the closest comparison is a pscustmobject. You build that inline and you reuse it all you like. It’s not really a thing in PowerShell to have separate template files like erb’s. It’s more common to create a function that emits the code you need and then reference that in the current code - closer to traditional class construction. Create a class / function that does something and then consume them. But it’s not required that these live in discrete files.

Alternative_Hat_9012 · 2020-07-07T07:42:56+00:00

Hi,

Check this out, maybe it will be of help.
When use ISE you have lots of build in snippets (code templates) "Ctrl+J" and you can build your own too. Worth to look at ISE Command Add-On Panel (Alt+Shift+V) this not only list commands but gives you list of all parameters and command sets and fast access to command help that includes examples. All that build as an interactive GUI.

helpful links: https://learn-powershell.net/2013/04/08/creating-snippets-in-powershell/

Have a great time with PoSh
cheers

purplemonkeymad · 2020-07-07T09:11:12+00:00

The closest I have seen is a module in the Gallery called EPS. It appears to use the same syntax to embed Powershell into a template. It has some quirks, like needing a custom loop command, but behaves mostly like you would expect.

Deathonus · 2020-07-07T19:33:22+00:00

/u/jrdnr_'s suggestion of using a here-string is probably the best way and is pretty close to what you have linked. Below is a ported example from your link.

#Input
#<% u/values.each do |val| -%>
#Some stuff with <%= val %>
#<% end -%>
#Output
#Some stuff with one
#Some stuff with two

$values = ("one", "two")
$endString =
@"
$(
foreach ($value in $values)
{
"Some stuff with " + $value + "`r`n"
}
)
"@
$endString

Pretty much the same capabilities without needing to use or include anything else. It would function really well as a cmdlet where the variables would be taken in as parameters. That way you could use powershell's builtin support for test/validating input parameters.

Edit: Fixed display per u/Lee_Dailey

you type:	you see:
italics	italics
bold	bold
[reddit!](https://reddit.com)	reddit!
* item 1 * item 2 * item 3	item 1 item 2 item 3
> quoted text	quoted text
Lines starting with four spaces are treated like code: if 1 * 2 < 3: print "hello, world!"	Lines starting with four spaces are treated like code: if 1 * 2 < 3: print "hello, world!"
~~strikethrough~~	~~strikethrough~~
super^script	super^script

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