Add support for creating tasks to format script files (#337)

[Roggstars]

🚀 Description

Following #337, I have added two tasks on the project level: ktfmtCheckScript and ktfmtFormatScript. These tasks will evaluate the formatting of top-level script (*.kts) files, like build.gradle.kts.

📄 Motivation and Context

Currently, script files are ignored by the plugin. Having a consistent formatting between those and source files would be great.

🧪 How Has This Been Tested?

I have added (and adjusted) some integration and unit tests. The old tests actually had some formatting issues in the script files that were used to set up the project in a temp directory. I have separated those changes into separate commits for better legibility during review. I will happily squash them into the primary feature commit, if necessary and desired by you.

I have also published the plugin to my local maven and applied it to

• an Android project
• a JVM project
• a multi-module KMP project (with limitations, see below)

Limitations
As documented in the README, ktfmt is not supposed to be applied to the top-level build.gradle.kts. Therefore, the top-level script files are currently not formatted. Is this a limitation of the plugin itself? Do we want to be able to apply the plugin on the top-level (might be useful now that we actually want to format files that are there).

📦 Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

✅ Checklist

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.

[simonhauck]

Thanks for this amazing PR, i will have definitely a look at it later.

There is still one test failing. Could you have a look @Roggstars ?

[Roggstars]

I'll check it out, thought I had run the preMerge task locally...

[cortinico]

Thanks for sending this over!

You still have a failing test though:

KtfmtCheckTaskIntegrationTest > check task should detect the source and test files in a flattened project structure() FAILED
    org.gradle.testkit.runner.UnexpectedBuildFailure at KtfmtCheckTaskIntegrationTest.kt:312

[cortinico]

nit: I'm wondering if those tasks should be pluralized instead:

Suggested change

	val checkTaskName = "${TASK_NAME_CHECK}Script"
	val formatTaskName = "${TASK_NAME_FORMAT}Script"
	val checkTaskName = "${TASK_NAME_CHECK}Scripts"
	val formatTaskName = "${TASK_NAME_FORMAT}Scripts"

[Roggstars]

Agreed and resolved in 4bd1fa6

[Roggstars]

I am still not 100% sure why the Windows machine keeps complaining about that single test. It fails because the build.gradle.kts file the test creates and appends is malformatted. I suspect this might have to do with different line separators on the different operating systems, but I am not 100% sure yet. I will check this out on my Windows machine and push a fix.

Edit: also, sorry for my force-pushes. Wasn't aware of all the messages this would create on the original issue. Will continue working on a branch in my fork now and only push to main when resolved. :)

[cortinico]

Edit: also, sorry for my force-pushes. Wasn't aware of all the messages this would create on the original issue. Will continue working on a branch in my fork now and only push to main when resolved. :)

No problem at all 👍 I'll mark this as draft and please change it back to ready-for-review when you're done