How to invoke bash or shell scripts from a haskell program?

Question

I'm writing some shell scripts with haskell, which I'm running in gitbash, but there are a few other existing scripts I'd like to be able to use from those scripts. For example, I'd like to run maven goals or do a git pull, but without having to integrate specifically with those tools. Is there a way to do this?

Accepted Answer

You can use `System.Process`. For example, executing `seq 1 10` shell command:

```
> import System.Process

> readProcess "seq" ["1", "10"] ""
"1
2
3
4
5
6
7
8
9
10
"
it :: String

> readProcessWithExitCode  "seq" ["1", "10"] ""
(ExitSuccess,"1
2
3
4
5
6
7
8
9
10
","")
it :: (GHC.IO.Exception.ExitCode, String, String)
```

How to invoke bash or shell scripts from a haskell program?

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