Modifying environment variable for a process with scala.sys.process?

Question

I want to run my process from scala, with several environment variables modified. For example:

Seq("bash","echo $asdf") !

and $asdf set to some value. Is there a way to do this from scala?

EDIT:

The closest I got to it so far:

val pb = new java.lang.ProcessBuilder("bash","echo $asdf")
pb.environment.put("asdf","value") }
val p = pb.start()
io.Source.fromInputStream(p.getInputStream).getLines.toList.foreach(println)
p.waitFor()

But this is ugly.

BTW, You can do it just like you do in Java: `import java.util._` `Runtime.getRuntime().exec("echo $PATH")` — om-nom-nom, Feb 25 '12 at 10:51
@om-nom-nom You can omit parens. In fact, see `sys.runtime`. — som-snytt, Aug 24 '13 at 05:02

score 19 · Accepted Answer · edited Sep 19 '13 at 19:40

19

Process(Seq("bash", "-c", "echo $asdf"), None, "asdf" -> "Hello, world!").!

See Process.

edited Sep 19 '13 at 19:40

Elias Dorneles

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answered Feb 25 '12 at 13:26

Daniel C. Sobral

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1

For the first time ever, my answer is longer than the Sobral answer it duplicates. Ironically, this answer more precisely answers what the duplicate question was probably trying to ask. http://stackoverflow.com/a/18411947/1296806 – som-snytt Aug 24 '13 at 05:00
@som-snytt This was a rather poor answer of mine. Shame on me! :) – Daniel C. Sobral Aug 24 '13 at 06:08
I tried this and it doesn't work, it tries to interpret "echo $asdf" as an executable -- gives `bash: echo $asdf: No such file or directory`. – Elias Dorneles Sep 19 '13 at 19:37
1

I got it working adding a -c: `Process(Seq("bash", "-c", "echo $asdf"), None, "asdf" -> "Hello, world!").!` – Elias Dorneles Sep 19 '13 at 19:39

Modifying environment variable for a process with scala.sys.process?

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