Validate new lines in template files

[MartinZikmund]

What would you like to be added:

unoplatform/uno#18989

Based on this report, new lines might not be consistent across all template-generated files

Why is this needed:

For which Platform:

• iOS
• Android
• WebAssembly
• WebAssembly renders for Xamarin.Forms
• Windows
• Build tasks

Anything else we need to know?

[jeromelaban]

The files in the repo are properly setup, it looks line dotnet new is mangling the contents, somehow.

May be related to dotnet/templating#1248

[MartinZikmund]

I am getting this even for MainPage.xaml even with Blank app created from the wizard

[jeromelaban]

The wizard is using dotnet new internally, the issue must be in there.

[DevTKSS]

Researched on stack overflow to this issue
https://stackoverflow.com/questions/170961/whats-the-strategy-for-handling-crlf-carriage-return-line-feed-with-git

And checked the unoapp folder in the templates repo here

And on the file ending .xaml there is none of this line ending attributes like on the xml or cs ones. On my fresh creates projects this issue is only and every time happening on xaml files, in the area of the namespaces and somewhere below but did not paied closer attention to this.

Also wondering about why there are different settings (lf and sometimes crlf) applied? Is there a reason why you choosen this instead of maybe lf for all? Windows prefers crlf and I do use it also in vs2022 but I think you might have had a reason to decide to this setting isnt it?

[MartinZikmund]

From #741 - The EOL around these lines:

      xmlns:local="using:UnoApp4.Presentation"
      xmlns:uen="using:Uno.Extensions.Navigation.UI"
      xmlns:utu="using:Uno.Toolkit.UI"
      xmlns:um="using:Uno.Material"

appear to be \n instead of \r\n like the rest of the file. Looks like a bug from this line:

uno.templates/src/Uno.Templates/content/unoapp/.template.config/template.json

Line 2347 in dfd835b

"value": "\n xmlns:utu=\"using:Uno.Toolkit.UI\""

(and similar lines)

[DevTKSS]

@MartinZikmund I would like to try out to pass a linebreak maybe in the xaml file which are having this issue, as alternative solution for this this on a forked branch, but dont know how I could set up that correctly, could you maybe help me with this?

How could I change that files in a local project and let it create a new one from that templates instead?

I compared the templates here in the repo and the lines, the CR LF Dialog is changing.
Lines to compare in the template files here:

• App.xaml ln 8: xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"$useThemesResourceNamespace$>
• MainPage.xaml ln 4: xmlns:local="using:MyExtensionsApp._1"$toolkitNamespace$$materialNamespace$$mauiNamespaces$
• Presentation\MainPage.xaml ln 4: xmlns:local="using:MyExtensionsApp._1.Presentation"$navigationNamespace$$toolkitNamespace$$materialNamespace$$mauiNamespaces$
• Presentation\SecondPage.xaml ln 6: xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"$navigationNamespace$$toolkitNamespace$$materialNamespace$
• Presentation\Shell.xaml ln 6: xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"$toolkitNamespace$

So what I am seeing is:

• Everywhere this issue is occuring we have all of those namespace placeholders in the same line as the static one which is also included in the "marked as changed" after closing the Dialog.
• In my new created app (blanc, desktop target, .net 8, mvux, di, material) I did not check toolkit and surprise: the Shell.xaml is not having that issue => the placeholder has not been used there, so did not cause an issue.