shellmet: Out of the shell solution for scripting in Haskell

[ command-line, library, mpl, program, shell ] [ Propose Tags ]

Shellmet provides easy and convenient way to call shell commands from Haskell programs


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Versions [faq] 0.0.0, 0.0.1, 0.0.2.0, 0.0.3.0, 0.0.3.1
Change log CHANGELOG.md
Dependencies base (>=4.10.1.0 && <4.15), process (>=1.6.1 && <1.7), shellmet, text (>=1.2.3 && <1.3) [details]
License MPL-2.0
Copyright 2019-2020 Kowainik
Author Dmitrii Kovanikov
Maintainer Kowainik <xrom.xkov@gmail.com>
Category Shell, Command Line
Home page https://github.com/kowainik/shellmet
Bug tracker https://github.com/kowainik/shellmet/issues
Source repo head: git clone https://github.com/kowainik/shellmet.git
Uploaded by shersh at 2020-05-07T17:14:40Z
Distributions Arch:0.0.3.1, NixOS:0.0.3.1, Stackage:0.0.1
Executables readme
Downloads 1667 total (102 in the last 30 days)
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Status Hackage Matrix CI
Docs uploaded by user
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Readme for shellmet-0.0.3.1

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shellmet

GitHub CI Hackage Stackage Lts Stackage Nightly MPL-2.0 license

Out of the shell solution for scripting in Haskell. Shellmet provides an easy and convenient way to call shell commands from Haskell programs.

Usage example

This README contains the usage example of the shellmet library. The example is runnable. You can build and execute with the following command:

cabal run readme

Setting up

Since this tutorial is written using Literate Haskell, first, let's write all necessary pragmas and imports.

{-# LANGUAGE OverloadedStrings #-}

import Data.Semigroup ((<>))
import Shellmet (($|))

import qualified Data.Text as T

Simple scripting example

Below you can see how easy it is to interact with shell commands in Haskell:

main :: IO ()
main = do
    "echo" ["Starting shellmet readme..."]
    text <- "cat" $| ["README.md"]
    let cnt = T.pack $ show $ length $ T.lines text
    "echo" ["Number of lines in this README: " <> cnt]

And the output is:

⚙  echo 'Starting shellmet readme...'
Starting shellmet readme...
⚙  echo 'Number of lines in this README: 54'
Number of lines in this README: 54