How can I determine which Operating System I use programmatically? I want to create a database file ...

# multiplatform

[Fyodor Danilov]

How can I determine which Operating System I use programmatically? I want to create a database file that will be stored in different places depending if the machine runs Windows or Linux.

[Jhaman das]

you want to determine platform? Like Android, iOS, Web ??

[Fyodor Danilov]

I want to determine OS for Desktop. Like Linux or Windows

[Jhaman das]

You can run javascript to get OS details. I am not web developer guy might you could find something on stackoverflow.

https://stackoverflow.com/questions/9514179/how-to-find-the-operating-system-details-using-javascript

[Fyodor Danilov]

I am writing for Desktop (jvmMain), so I don't have access to JavaScript. Only Kotlin and Java

[hallvard]

What do you get from System.getProperty("os.name")?

[krzysztof]

I want to create a database file that will be stored in different places depending if the machine runs Windows or Linux.

sounds like expect/actual case?

[hallvard]

Should hardly think so, Krzysztof, since in both cases this will run on the JVM.

[krzysztof]

Yeah, but you can have per-platform case even there, right?

like with targets:

common:
expect fun getDbPath(): String

macos:
expect fun getDbPath(): String

mingw: 
expect fun getDbPath(): String

linux:
expect fun getDbPath(): String

[hallvard]

Or just stuff them all into the JVM platform and do a simple if/then when picking the path?
fun getDbPath(os: String) = if os.contains("linux") "linux-path" else "windows-path"

[krzysztof]

of course, it's just that it's more error prone to do it that way

[chr]

https://mvnrepository.com/artifact/org.apache.commons/commons-lang3/

SystemUtils has several utilities for this:
• IS_OS_WINDOWS
• IS_OS_LINUX
• …etc

[Henri Gourvest]

private val isWindows = (FileSystems.getDefault().separator == "\\")