This tool is a standard cabal package with an executable named ud and can be built and installed using standard cabal procedures:
Build dependencies:
$ cabal update
$ cabal build --enable-tests --only-dependenciesBuild everything:
$ cabal build --enable-testsTest the library (including property tests):
$ cabal test --test-show-details=direct
Running 1 test suites...
Test suite uptime-dick-tests: RUNNING...
Dick conversion
Simple int example [✔]
Universal properties of dick
Always starts with balls [✔]
+++ OK, passed 100 tests.
...Directly run the executable:
$ cabal run ud
8======D$ cabal install
$ ud
8===========DThis project may seem slightly over-engineered, and indeed it is. This minimalist approach, directly executable, would also suffice:
#!/usr/bin/env cabal
{- cabal:
build-depends: base, sysinfo
-}
import System.SysInfo
main :: IO ()
main = do
uts <- either (const 42) uptime <$> sysInfo
let utd = fromIntegral $ uts `div` (60*60*24)
putStrLn $ "8" ++ replicate utd '=' ++ "D"However, this project also provides a comprehensive template for a Haskell library and executable, complete with automated builds and property tests.
(c) 2025 Mirko Westermeier.
Released under the MIT license. See LICENSE for details.