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qr-repa: Library to generate QR codes from bytestrings and objects and scale image files

[ bsd3, data, library, program ] [ Propose Tags ]

Please see README.md

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  • Data
    • QRCodes
      • Data.QRCodes.Repa

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Versions [RSS] 0.1.0.0
Dependencies aeson, base (>=4.7 && <5), bytestring, cryptonite, directory, haskell-qrencode, jose-jwt, lens, qr-repa, repa, repa-devil, vector [details]
License BSD-3-Clause
Copyright Copyright: (c) 2016 Vanessa McHale
Author Vanessa McHale
Maintainer tmchale@wisc.edu
Category Data
Home page https://github.com/vmchale/QRRepa#readme
Source repo head: git clone https://github.com/vmchale/QRRepa
Uploaded by vmchale at 2016-12-15T03:57:58Z
Distributions
Executables qrpipe
Downloads 948 total (5 in the last 30 days)
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Status Docs not available [build log]
All reported builds failed as of 2016-12-15 [all 3 reports]

Readme for qr-repa-0.1.0.0

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#QR Imager Library This is a library to generate .png files from QR codes.

##Dependencies The library depends on the C library https://github.com/fukuchi/libqrencode which you will need to install separately.

##Usage The library exports main functions - createQRCode and byteStringToQR - and their secured/signed versions. The first takes any object that is an instance of ToJSON and writes an image to file, while the second takes a (strict) bytestring and writes it to file.

##Executable

###Installation For building haskell, the best tool is currently http://haskellstack.org. Install it, and then type

stack install --install-ghc

in the appropriate directory, and it will be installed on your path.

###Use

Compiling will generate an executable called QRPipe which reads from stdin and outputs a file as the second argument, e.g.

echo 'My name is:" | qrpipe "nametag.png"