+// Used for detecting system arch from package download url, for example:
+//
+// https://git.com/org/foo/releases/v0.7.9/foo-aarch64-linux-musl.tar.gz
+// https://git.com/org/foo/releases/v0.7.9/foo-arm-linux-musleabihf.tar.gz
+// https://git.com/org/foo/releases/v0.7.9/foo-armv7-linux-musleabihf.tar.gz
+// https://git.com/org/foo/releases/v0.7.9/foo-x86_64-linux-musl.tar.gz
+//