There is a bug in this logic of getting idea.platform.prefix and I made a solution.

[allinprogram]

Problem description

Some intellij products installing by ToolBox, use this plugin to execute runIde, will got a blocking error that users are required to manually specify the idea.platform.prefix.

Problem analysis

org.jetbrains.intellij.tasks.RunIdeBase line 127: find the idea.platform.prefix by iterating the file who name have sh, this is not robust.

I found that some intellij products installing by ToolBox do not have this file. I think this should be obtained through product-info.json, not some files named *.sh.

we can get the productCode in product-info.json, finally get the idea.platform.prefix By comparing withorg.jetbrains.idea.devkit.projectRoots.IntelliJPlatformProduct and com.intellij.util.PlatformUtils.

As a result, we can delete the misleading code (!ideBuildNumber(ideDir.get().asFile).startsWith("IU-")):

// Inadvertently misleading users, only allowing ultimate use. 
// At least it looks like that from the code.
if (prefix == null && !ideBuildNumber(ideDir.get().asFile).startsWith("IU-")) {
    throw TaskExecutionException(this, GradleException("Cannot find IDE platform prefix. Please create a bug report at https://github.com/jetbrains/gradle-intellij-plugin. " 
+ "As a workaround specify `idea.platform.prefix` system property for task `${this.name}` manually."))
}

In the end

I hope I can help solve this problem and I really want to submit a helpful pr, But limited by my code ability of kotlin.

[zolotov]

I found that some intellij products installing by ToolBox do not have this file.

Please, describe exact scenario. What IDE you're talking about? What version?

By comparing withorg.jetbrains.idea.devkit.projectRoots.IntelliJPlatformProduct and com.intellij.util.PlatformUtils.

Thank you for the suggestions. We have considered product-info.json. Unfortunately, it doesn't fit to us, because we cannot find a prefix by product code:

1. gradle-intellij-plugin doesn't have sources to match
2. these classes don't contain information about IDEs made not by JetBrains

[allinprogram]

I found that some intellij products installing by ToolBox do not have this file.

Please, describe exact scenario. What IDE you're talking about? What version?

By comparing withorg.jetbrains.idea.devkit.projectRoots.IntelliJPlatformProduct and com.intellij.util.PlatformUtils.

Thank you for the suggestions. We have considered product-info.json. Unfortunately, it doesn't fit to us, because we cannot find a prefix by product code:

1. gradle-intellij-plugin doesn't have sources to match
2. these classes don't contain information about IDEs made not by JetBrains

I found the problem in the Idea Community 2021.2 MacOS installed by Toolbox.
Infact, I reproduced the problem in the Idea Community 2021.2 WIN10 installed by Toolbox.
They will throws this exception when using the plugin to exec runIde Task, then I must add the idea.platform.prefix manully to avoid the exception.

If need more information I provided, please contact me.