Possibility of "if" in templates?

[buehler]

Hey @tmrts

I'm really tempted to use boilr, but one critical feature is missing. I need the possibility to create a condition in the questions. Nothing very complicated, but still. I had the idea of implementing it on my own, but there are so many libraries and tools out there, I didn't want to make "just another templater".

So I found your boilr.

Do you think it would be possible to add an if condition to the project.json?

Like:

{
    "AppName": "Demo",
    "ExpertMode": [
        true,
        false
    ],
    "FolderName": {
        "value": "Demo",
        "condition": "ExpertMode"
    }
}

Only ask the question about the FolderName if the answer to ExpertMode is evaluated truthly.

Cheers
Chris

[tmrts]

Chris thank you for trying out boilr.

What you need is already implemented and can be used as such:

{
    "ExpertMode": false,
}

Default value of ExpertMode will be false and the user will see a boolean prompt for true/false.

In template usage:

{{ If ExpertMode }}
....
{{ end }}

For more information please take a look at the wiki pages.
It explains the templating features of boilr.

For creating templates check this page.

[buehler]

There is a little misunderstanding 😉

I don't want to use {{ If ExpertMode }} in the templates. Its the initial questioning of the user that I'm interested in.

So if I define my condition stuff, the user gets asked about this question only if the condition is true.

project.json:

{
    "AppName": "Demo",
    "ExpertMode": false,
    "FolderName": {
        "value": "Demo",
        "condition": "ExpertMode"
    }
}

Example workflows:
1.)

• boilr template use demo .
• User gets asked: Please choose a value for "AppName"
• User gets asked: Please choose a value for "ExpertMode"
• User selects "false".
• Template engine does its magic.

2.)

• boilr template use demo .
• User gets asked: Please choose a value for "AppName"
• User gets asked: Please choose a value for "ExpertMode"
• User selects "true".
• User gets asked: Please choose a value for "FolderName"
• Template engine does its magic.

Cheers

[tmrts]

Gotcha I see what you mean 👍

I can make an enhancement as such:

{
    "AppName": "Demo",
    "ExpertMode": {
        "FolderName": "Demo",
        "RepoNumber: 5,
    }
}

The workflow:

1. Prompt for AppName
2. Confirmation prompt for ExpertMode
3. If ExpertMode enabled, Prompt for the fields inside. Else, use default values of those.

I'll stew on this a bit more to get a good idea of pros/cons, but the feature is a good one and I'll work on it. Final usage might be a bit different

Thanks for bringing this up, I was thinking about this earlier, but got sidetracked and forgot.

[buehler]

Cool! 👍
Yea that's exactly what I meant. This would be awesome!

And to be a little "challenging": in the same changes, would it be possible to add variables to the default values? i.e. run the default variables through go-templates first.

Like:

"AppName": "Demo",
"FolderName": "{{AppName}}"

If this is possible (and easy) too, it would be as awesome as any other template engine! 😉

Well, maybe I'll find the time to implement this one on my own and send you a PR, we'll see.

[tmrts]

Thanks for another good suggestion. I'll see what I can do, but It'd be a good idea to move this suggestion to a new issue just so it doesn't get lost.

I welcome any contribution, however at this stage adoption and feedback is more important to me. So, you are already making big contributions thank you 👍 .

[hoangmirs]

Hi @tmrts
After the changes in 7b973fc, can I use the following project configuration?

{
    "AppName": "Demo",
    "ExpertMode": {
        "FolderName": "Demo",
        "RepoNumber: 5,
    }
}

I tried but it did not work, could you tell me how to use it?
Thank you