fun getDefaultTargetTriple()

in plugin/src/main/kotlin/com/nishtahir/CargoBuildTask.kt [252:279]

• 23 lines of code
• 3 McCabe index (conditional complexity)

fun getDefaultTargetTriple(project: Project, rustc: String): String? {
    val stdout = ByteArrayOutputStream()
    val result = project.exec { spec ->
        spec.standardOutput = stdout
        spec.commandLine = listOf(rustc, "--version", "--verbose")
    }
    if (result.exitValue != 0) {
        project.logger.warn(
            "Failed to get default target triple from rustc (exit code: ${result.exitValue})")
        return null
    }
    val output = stdout.toString()

    // The `rustc --version --verbose` output contains a number of lines like `key: value`.
    // We're only interested in `host: `, which corresponds to the default target triple.
    val triplePrefix = "host: "

    val triple = output.split("\n")
        .find { it.startsWith(triplePrefix) }
        ?.let { it.substring(triplePrefix.length).trim() }

    if (triple == null) {
        project.logger.warn("Failed to parse `rustc -Vv` output! (Please report a rust-android-gradle bug)")
    } else {
        project.logger.info("Default rust target triple: $triple")
    }
    return triple
}