https://github.com/juhp/simple-cmd

Simple Haskell shell command process wrapper library
https://github.com/juhp/simple-cmd

Last synced: 8 days ago
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Simple Haskell shell command process wrapper library

• Host: GitHub
• URL: https://github.com/juhp/simple-cmd
• Owner: juhp
• License: bsd-3-clause
• Created: 2017-04-14T10:33:01.000Z (over 7 years ago)
• Default Branch: main
• Last Pushed: 2022-09-17T08:50:24.000Z (about 2 years ago)
• Last Synced: 2024-04-25T23:31:19.089Z (7 months ago)
• Language: Haskell
• Size: 115 KB
• Stars: 4
• Watchers: 4
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • Changelog: ChangeLog.md
  • License: LICENSE

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# simple-cmd

Some simple String wrappers of `readProcess`, `readProcessWithExitCode`,

`rawSystem` from the Haskell `process` library.

## Usage

```haskell

import SimpleCmd

```

```haskell

cmd_ :: String -> [String] -> IO ()

```

outputs to stdout. For example

```haskell

cmd_ "echo" ["Hello"]

cmd_ "git" ["clone", url]

```

This can shortened to `git_ "clone" [url]`.

```haskell

cmd :: String -> [String] -> IO String

```

returns stdout as a `String`. eg

```haskell

date <- cmd "date" []

```

There are also `cmdBool`, `cmdMaybe`, `cmdList`, `shell`, and others.

Simple pipes are also supported:

```haskell

pipe_ ("echo",["hello"]) ("grep",["ello"])

```

`pipeBool` returns True if both commands succeed.

Other examples:

```haskell

gitBranch :: IO String

grep_ pat file :: IO Bool

sudo_ c args :: IO ()

timeIO :: IO a -> IO a

```

See the library documentation for more details.