[build] Settings.gradle's logic to handle different buildFile name could result in phantom subproject

[guesshe]

Expected Behavior
Regardless of the buildFile names, no phantom subprojects should be created.

If a subproject has a default buildFile name like build.grade, the build setup should NOT create a phantom subproject.

Current Behavior
If a new subproject is added in with structure like this spring-security-foo/spring-security-foo-bar, using a default buildFile name build.gradle under spring-security-foo-bar will result in the creation of a phantom subproject spring-security-foo.

No phantom subproject should be created due to the name change of the buildFile.

Context
Settings.gradle should be updated to give a consistent behavior for different buildFile names.
The issue is described here in gradle's documentation. https://docs.gradle.org/8.12/userguide/multi_project_builds.html. It will happen when creating a new sub-project if this settings.gradle file is used for both default buildFile name and custom buildFile name.

Code snippet to fix

buildFiles.each { File buildFile ->

    boolean isDefaultName = 'build.gradle' == buildFile.name
    if (isDefaultName) {
        String buildFilePath = buildFile.parentFile.absolutePath
        String projectName = buildFilePath.tokenize(File.separator)[-1]
        configureProject(':' + projectName, projectName, buildFile)
    } else {
        String projectName = buildFile.name.replace('.gradle', '')
        configureProject(':' + projectName, projectName, buildFile)
    }
}

def configureProject(String projectPath, String projectName, File buildFile) {
    include(projectPath)

    def project = findProject(projectPath)
    project.name = projectName
    project.projectDir = buildFile.parentFile
    project.buildFileName = buildFile.name
}

[sjohnr]

Closing as a duplicate of gh-16322