diff --git a/CHANGES b/CHANGES new file mode 100644 --- /dev/null +++ b/CHANGES @@ -0,0 +1,20 @@ +quickbench changes: + +1.0 (pending) + +- extract tools/simplebench from the hledger repo + +- stop using error, make safe for reuse + +- more robust command execution, signal handling, output, error reporting + +- switch to docopt, options must precede args for now + +- new UI: full commands are specified by arguments/file/stdin, + alternate executables can be specified with -w, flags cleanup + +- default file for test commands is ./bench.sh + +- -N/--cycles repeats the whole test suite + +- man page diff --git a/LICENSE b/LICENSE new file mode 100644 --- /dev/null +++ b/LICENSE @@ -0,0 +1,674 @@ + GNU GENERAL PUBLIC LICENSE + Version 3, 29 June 2007 + + Copyright (C) 2007 Free Software Foundation, Inc. + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The GNU General Public License is a free, copyleft license for +software and other kinds of works. + + The licenses for most software and other practical works are designed +to take away your freedom to share and change the works. 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If your program is a subroutine library, you +may consider it more useful to permit linking proprietary applications with +the library. If this is what you want to do, use the GNU Lesser General +Public License instead of this License. But first, please read +. diff --git a/README.md b/README.md new file mode 100644 --- /dev/null +++ b/README.md @@ -0,0 +1,191 @@ +# quickbench 1.0 + +Quick & easy benchmarking of command-line programs. + + [About](#about) +| [Examples](#examples) +| [Usage](#usage) +| [Related](#related-work) + + +## About + +quickbench is an update and repackaging of a little benchmarking tool I've been +using in the hledger project since 2008. +Use it like a more powerful "time" command for measuring the time taken by command-line programs, +or for creating repeatable benchmark scripts for your projects. + +quickbench produces very simple output (elapsed seconds), +as quickly as possible (running commands just once by default), +and tabulates results from multiple executables. +I find it very useful for quick and dirty, exploratory, and comparative measurements +that you can understand at a glance. + +## Examples + +Install it easily on most platforms with [stack](https://haskell-lang.org/get-started) (or cabal). +It's not yet on Hackage, so you'll need the source: + +``` +$ git clone https://github.com/simonmichael/quickbench +$ cd quickbench +$ stack install # ensure $PATH includes ~/.local/bin +``` + +You can specify test commands as arguments: +``` +$ quickbench 'sleep 1' +Running 1 tests 1 times at 2016-10-16 23:06:48.058578 UTC: + +Best times: ++---------++------+ +| || | ++=========++======+ +| sleep 1 || 1.01 | ++---------++------+ +``` + +or put them in a file and use `-f FILE`. +A file named `bench.sh` in the current directory will be used automatically: +``` +$ echo 'echo 3 * 1000000' > bench.sh +$ quickbench +Running 1 tests 1 times at 2016-10-16 23:53:04.743899 UTC: + +Best times: ++------------------++------+ +| || | ++==================++======+ +| echo 3 * 1000000 || 0.00 | ++------------------++------+ +``` + +You can compare results with different executables: +``` +$ quickbench -w echo,expr -p5 +Running 1 tests 1 times with 2 executables at 2016-10-16 23:56:40.808703 UTC: + +Best times: ++-------------++---------+---------+ +| || echo | expr | ++=============++=========+=========+ +| 3 * 1000000 || 0.00229 | 0.00195 | ++-------------++---------+---------+ +``` + +and run tests repeatedly to reduce or observe jitter. +quickbench assumes the quickest measurement is the truest one: +``` +$ quickbench -w echo,expr -p5 -n100 -N2 +Running 1 tests 100 times with 2 executables at 2016-10-16 23:57:34.387764 UTC: + +Best times 1: ++-------------++---------+---------+ +| || echo | expr | ++=============++=========+=========+ +| 3 * 1000000 || 0.00112 | 0.00135 | ++-------------++---------+---------+ + +Best times 2: ++-------------++---------+---------+ +| || echo | expr | ++=============++=========+=========+ +| 3 * 1000000 || 0.00111 | 0.00136 | ++-------------++---------+---------+ +``` + +You can turn a shell script into a benchmark suite by adding a shebang line: +``` +$ cat 410-run-time.sh +#!/usr/bin/env quickbench -v -p2 -n2 -w hledger-410-before,hledger-410-8bde75c -f +hledger -f 10000x1000x10.journal print +hledger -f 10000x1000x10.journal register +hledger -f 10000x1000x10.journal balance + +$ ./410-run-time.sh +Running 3 tests 2 times with 2 executables at 2016-10-16 23:42:57.349721 UTC: +1: hledger-410-before -f 10000x1000x10.journal print + [3.14s] +2: hledger-410-before -f 10000x1000x10.journal print + [2.90s] +1: hledger-410-8bde75c -f 10000x1000x10.journal print + [3.13s] +2: hledger-410-8bde75c -f 10000x1000x10.journal print + [2.92s] +1: hledger-410-before -f 10000x1000x10.journal register + [3.52s] +2: hledger-410-before -f 10000x1000x10.journal register + [3.52s] +1: hledger-410-8bde75c -f 10000x1000x10.journal register + [3.51s] +2: hledger-410-8bde75c -f 10000x1000x10.journal register + [3.66s] +1: hledger-410-before -f 10000x1000x10.journal balance + [3.38s] +2: hledger-410-before -f 10000x1000x10.journal balance + [1.93s] +1: hledger-410-8bde75c -f 10000x1000x10.journal balance + [1.93s] +2: hledger-410-8bde75c -f 10000x1000x10.journal balance + [1.80s] + +Best times: ++-----------------------------------++--------------------+---------------------+ +| || hledger-410-before | hledger-410-8bde75c | ++===================================++====================+=====================+ +| -f 10000x1000x10.journal print || 2.90 | 2.92 | +| -f 10000x1000x10.journal register || 3.52 | 3.51 | +| -f 10000x1000x10.journal balance || 1.93 | 1.80 | ++-----------------------------------++--------------------+---------------------+ +``` + +## Usage + +``` +$ quickbench -h +quickbench 1.0 +Run some test commands, possibly with different executables, once or more +and show their best execution times. +Commands are specified as one or more quote-enclosed arguments, +and/or one per line in CMDSFILE; or read from a default file [./bench.sh]. +With -w, commands' first words are replaced with a new executable +(or multiple comma-separated executables, showing times for all). +Note: tests executable files only, not shell builtins; options must precede args. + +Usage: + quickbench [options] [...] + +Options: + -f, --file CMDSFILE file containing commands, one per line (- for stdin) + -w, --with EXE[,...] replace first word of commands with these executables + -n, --iterations=N run each test this many times [default: 1] + -N, --cycles=N run the whole suite this many times [default: 1] + -p, --precision=N show times with this many decimal places [default: 2] + -v, --verbose show commands being run + -V, --more-verbose show command output + --debug show debug output for this program + -h, --help show this help +``` + +## Related + +[bench](https://github.com/Gabriel439/bench#readme) (Gabriel Gonzalez 2016) is another +command line benchmarking tool written in Haskell. +Use that one if you need detailed statistical analysis and output, or HTML reports. +Here is bench's output for the echo/expr example above: +``` +$ bench 'echo 3 * 1000000'; bench 'expr 3 \* 1000000' +benchmarking echo 3 * 1000000 +time 2.215 ms (2.173 ms .. 2.250 ms) + 0.995 R² (0.989 R² .. 0.998 R²) +mean 2.238 ms (2.203 ms .. 2.296 ms) +std dev 147.6 μs (92.84 μs .. 265.3 μs) +variance introduced by outliers: 48% (moderately inflated) + +benchmarking expr 3 \* 1000000 +time 3.484 ms (3.405 ms .. 3.556 ms) + 0.994 R² (0.987 R² .. 0.998 R²) +mean 3.564 ms (3.497 ms .. 3.684 ms) +std dev 280.3 μs (178.0 μs .. 494.9 μs) +variance introduced by outliers: 52% (severely inflated) +``` diff --git a/Setup.hs b/Setup.hs new file mode 100644 --- /dev/null +++ b/Setup.hs @@ -0,0 +1,2 @@ +import Distribution.Simple +main = defaultMain diff --git a/app/Main.hs b/app/Main.hs new file mode 100644 --- /dev/null +++ b/app/Main.hs @@ -0,0 +1,7 @@ +module Main where + +import System.Exit +import QuickBench (defaultMain) + +main :: IO () +main = defaultMain >>= maybe exitSuccess die diff --git a/quickbench.1 b/quickbench.1 new file mode 100644 --- /dev/null +++ b/quickbench.1 @@ -0,0 +1,141 @@ +.\" Automatically generated by Pandoc 1.17.1 +.\" +.TH "quickbench" "1" "Oct 2016" "quickbench 1.0" "" +.hy +.SH NAME +.PP +quickbench \- quick & easy benchmarking of command\-line programs +.SH SYNOPSIS +.PP +\f[C]quickbench\ [options]\ [...]\f[] +.SH DESCRIPTION +.PP +quickbench runs some test commands, possibly with different executables, +once or more and shows their best execution times in tabular format. +.PP +It produces very simple output (elapsed seconds), as quickly as possible +(running commands just once by default), and tabulates results from +multiple executables. +I find it useful for quick and dirty, exploratory, and comparative +.PD 0 +.P +.PD +measurements that you (and others) can understand at a glance. +.PP +Commands are specified as one or more quote\-enclosed arguments, and/or +one per line in CMDSFILE; or read from a default file [./bench.sh]. +.PP +With \-w, commands\[aq] first words are replaced with a new executable +(or multiple comma\-separated executables, showing times for all). +.SH OPTIONS +.TP +.B \f[C]\-f,\ \-\-file\ CMDSFILE\f[] +file containing commands, one per line (\- for stdin) +.RS +.RE +.TP +.B \f[C]\-w,\ \-\-with\ EXE[,...]\f[] +replace first word of commands with these executables +.RS +.RE +.TP +.B \f[C]\-n,\ \-\-iterations=N\f[] +run each test this many times [default: 1] +.RS +.RE +.TP +.B \f[C]\-N,\ \-\-cycles=N\f[] +run the whole suite this many times [default: 1] +.RS +.RE +.TP +.B \f[C]\-p,\ \-\-precision=N\f[] +show times with this many decimal places [default: 2] +.RS +.RE +.TP +.B \f[C]\-v,\ \-\-verbose\f[] +show commands being run +.RS +.RE +.TP +.B \f[C]\-V,\ \-\-more\-verbose\f[] +show command output +.RS +.RE +.TP +.B \f[C]\-\-debug\f[] +show debug output for this program +.RS +.RE +.TP +.B \f[C]\-h,\ \-\-help\f[] +show this help +.RS +.RE +.SH EXAMPLES +.IP +.nf +\f[C] +$\ quickbench\ \[aq]sleep\ 1\[aq] +Running\ 1\ tests\ 1\ times\ at\ 2016\-10\-16\ 23:06:48.058578\ UTC: + +Best\ times: ++\-\-\-\-\-\-\-\-\-++\-\-\-\-\-\-+ +|\ \ \ \ \ \ \ \ \ ||\ \ \ \ \ \ | ++=========++======+ +|\ sleep\ 1\ ||\ 1.01\ | ++\-\-\-\-\-\-\-\-\-++\-\-\-\-\-\-+ +\f[] +.fi +.IP +.nf +\f[C] +$\ echo\ \[aq]echo\ 3\ *\ 1000000\[aq]\ >\ bench.sh +$\ quickbench\ \-w\ echo,expr\ \-p5\ \-n100\ \-N2 +Running\ 1\ tests\ 100\ times\ with\ 2\ executables\ at\ 2016\-10\-16\ 23:57:34.387764\ UTC: + +Best\ times\ 1: ++\-\-\-\-\-\-\-\-\-\-\-\-\-++\-\-\-\-\-\-\-\-\-+\-\-\-\-\-\-\-\-\-+ +|\ \ \ \ \ \ \ \ \ \ \ \ \ ||\ \ \ \ echo\ |\ \ \ \ expr\ | ++=============++=========+=========+ +|\ 3\ *\ 1000000\ ||\ 0.00112\ |\ 0.00135\ | ++\-\-\-\-\-\-\-\-\-\-\-\-\-++\-\-\-\-\-\-\-\-\-+\-\-\-\-\-\-\-\-\-+ + +Best\ times\ 2: ++\-\-\-\-\-\-\-\-\-\-\-\-\-++\-\-\-\-\-\-\-\-\-+\-\-\-\-\-\-\-\-\-+ +|\ \ \ \ \ \ \ \ \ \ \ \ \ ||\ \ \ \ echo\ |\ \ \ \ expr\ | ++=============++=========+=========+ +|\ 3\ *\ 1000000\ ||\ 0.00111\ |\ 0.00136\ | ++\-\-\-\-\-\-\-\-\-\-\-\-\-++\-\-\-\-\-\-\-\-\-+\-\-\-\-\-\-\-\-\-+ +\f[] +.fi +.SH FILES +.PP +quickbench looks for tests in \f[C]\&./bench.sh\f[] if no command +arguments or \f[C]\-\-file\f[] option are provided. +.SH LIMITATIONS +.PP +quickbench tests executable files on disk only, not shell builtins or +aliases. +.PP +Options must precede arguments on the command line. +.PP +\f[C]\-V\f[] will become \f[C]\-vv\f[] when implementing that becomes +easier. +.SH BUG REPORTS +.PP +https://github.com/simonmichael/quickbench/issues +.SH SEE ALSO +.PP +Home page: https://github.com/simonmichael/quickbench +.PP +bench(1): https://github.com/Gabriel439/bench +.PP +time(1) +.SH COPYRIGHT +.PP +Copyright (C) 2008\-2016 Simon Michael. +Released under GNU GPL v3+ +.SH AUTHORS +Simon Michael . diff --git a/quickbench.cabal b/quickbench.cabal new file mode 100644 --- /dev/null +++ b/quickbench.cabal @@ -0,0 +1,66 @@ +name: quickbench +version: 1.0 +synopsis: quick & easy benchmarking of command-line programs +description: + quickbench produces very simple output (elapsed seconds), + as quickly as possible (running commands just once by default), + and tabulates results from multiple executables. + I find it very useful for quick and dirty, exploratory, and comparative measurements + that you can understand at a glance. + Please see the readme for more. +homepage: https://github.com/simonmichael/quickbench#readme +license: GPL +license-file: LICENSE +author: Simon Michael +maintainer: simon@joyful.com +copyright: Copyright: (c) 2008-2016 Simon Michael +category: Development +build-type: Simple +cabal-version: >=1.10 +tested-with: GHC==8.0 + +extra-source-files: + README.md + CHANGES + stack.yaml + quickbench.1 + +library + hs-source-dirs: src + exposed-modules: QuickBench + build-depends: + base >= 4.7 && < 5 + ,containers + ,directory + ,docopt >= 0.7.0.4 + ,pretty-show + ,process + ,safe + ,split + ,tabular + ,time + default-language: Haskell2010 + ghc-options: -Wall + +executable quickbench + hs-source-dirs: app + main-is: Main.hs + build-depends: + quickbench == 1.0 + ,base + ,process + default-language: Haskell2010 + ghc-options: -Wall + +test-suite quickbench-test + type: exitcode-stdio-1.0 + hs-source-dirs: test + main-is: Spec.hs + build-depends: base + , quickbench + ghc-options: -Wall + default-language: Haskell2010 + +source-repository head + type: git + location: https://github.com/simonmichael/quickbench diff --git a/src/QuickBench.hs b/src/QuickBench.hs new file mode 100644 --- /dev/null +++ b/src/QuickBench.hs @@ -0,0 +1,260 @@ +{-# LANGUAGE ScopedTypeVariables, QuasiQuotes #-} + +module QuickBench ( + defaultMain +) +where + +import Control.Exception +import Control.Monad +import Data.List +import Data.List.Split (splitOn) +import Data.Maybe +import Data.Time.Clock +import Data.Time.Format +import Data.Time.LocalTime +import Safe +import System.Console.Docopt +import System.Directory +import System.Environment +import System.Exit +import System.IO +import System.Process +import Text.Show.Pretty +import Text.Printf +import Text.Tabular +import qualified Text.Tabular.AsciiArt as TA + +---------------------------------------80---------------------------------------- +docoptpatterns :: Docopt +docoptpatterns = [docopt|quickbench 1.0 +Run some test commands, possibly with different executables, once or more +and show their best execution times. +Commands are specified as one or more quote-enclosed arguments, +and/or one per line in CMDSFILE; or read from a default file [./bench.sh]. +With -w, commands' first words are replaced with a new executable +(or multiple comma-separated executables, showing times for all). +Note: tests executable files only, not shell builtins; options must precede args. + +Usage: + quickbench [options] [...] + +Options: + -f, --file CMDSFILE file containing commands, one per line (- for stdin) + -w, --with EXE[,...] replace first word of commands with these executables + -n, --iterations=N run each test this many times [default: 1] + -N, --cycles=N run the whole suite this many times [default: 1] + -p, --precision=N show times with this many decimal places [default: 2] + -v, --verbose show commands being run + -V, --more-verbose show command output + --debug show debug output for this program + -h, --help show this help +|] +-- CLI help. When changing this, remember to sync: +-- quickbench.cabal +-- README.md +-- quickbench.1.md +-- unknown option checking below +-- Just assumptions below, if changing [default] annotations. +-- Try to avoid writing the same thing different ways in all of these places. + +defaultFile :: FilePath +defaultFile = "bench.sh" + +data Opts = Opts { + file :: Maybe FilePath + ,executables :: [String] + ,iterations :: Int + ,cycles :: Int + ,precision :: Int + ,verbose :: Bool + ,moreVerbose :: Bool + ,debug :: Bool + ,help :: Bool + ,clicmds :: [String] +} deriving (Show) + +getOpts :: IO Opts +getOpts = do + dopts <- parseArgsOrExit docoptpatterns =<< getArgs + let + flag f = dopts `isPresent` longOption f + option f = dopts `getArg` longOption f + readint s = + case readMay s of + Just a -> return a + Nothing -> fail $ "could not read " ++ show s ++ " as an integer" + (lateflags,args) = partition ("-" `isPrefixOf`) $ dopts `getAllArgs` (argument "cmd") + iterations' <- readint $ fromJust $ option "iterations" -- fromJust safe because of [default:] above + cycles' <- readint $ fromJust $ option "cycles" + precision' <- readint $ fromJust $ option "precision" + let + opts = Opts { + file = option "file" + ,executables = maybe [] (splitOn ",") $ option "with" + ,iterations = iterations' + ,cycles = cycles' + ,precision = precision' + ,verbose = flag "verbose" + ,moreVerbose = flag "more-verbose" + ,debug = flag "debug" + ,help = flag "help" + ,clicmds = args + } + when (debug opts || "--debug" `elem` lateflags) $ do + err $ "docopts: " ++ ppShow dopts ++ "\n" ++ ppShow opts ++ "\n" + when (help opts) $ putStrLn (usage docoptpatterns) >> exitSuccess + -- try to report some errors docopts misses + case (lateflags, args) of + -- unknown option + -- quickbench a -fk user error (unknown option: "fk") + -- (f:_,[]) | not $ elem f [ + -- "file","f" + -- ,"with","w" + -- ,"iterations","n" + -- ,"cycles","N" + -- ,"precision","p" + -- ,"verbose","v" + -- ,"more-verbose","V" + -- ] -> fail $ printf "unknown option: %s" (show f) + -- option value missing + (f:_,[]) -> fail $ printf "option %s needs a value or is unknown" (show f) + -- option following arguments + (f:_,a:_) -> fail $ printf "option %s should appear before argument %s or is unknown" (show f) (show a) + _ -> return () + return opts + +-- | Run the quickbench program, returning an error message if there was a problem. +defaultMain :: IO (Maybe String) +defaultMain = + (runSuite >> return Nothing) + `catch` \(e :: SomeException) -> return $ + if fromException e == Just ExitSuccess + then Nothing + else Just $ show e + where + runSuite = do + opts <- getOpts + filecmds <- + (filter istest . lines) <$> + (case (file opts, clicmds opts) of + (Just "-", _) -> getContents + (Just f, _) -> readFile f + (Nothing, []) -> doesFileExist defaultFile >>= + \yes -> if yes then readFile defaultFile else return "" + (Nothing, _) -> return []) + let cmds = filecmds ++ clicmds opts + when (null cmds) $ do + out opts "No test commands found; provide some as arguments, with -f, or in ./bench.sh\n" + exitSuccess + now <- getCurrentZonedTime + out opts $ printf "Running %d tests %d times%s at %s:\n" + (length cmds) + (iterations opts) + (case executables opts of + [] -> "" + es -> printf " with %d executables" (length es)) + (formatTime defaultTimeLocale "%Y-%m-%d %T %Z" now) + let + exes = case executables opts of + [] -> [""] + es -> es + hSetBuffering stdout NoBuffering + forM_ [1..cycles opts] $ \cyc -> do + results <- mapM (runTestWithExes opts exes) cmds + printSummary opts cmds exes cyc results + +getCurrentZonedTime :: IO ZonedTime +getCurrentZonedTime = do + t <- getCurrentTime + tz <- getCurrentTimeZone + return $ utcToZonedTime tz t + +runTestWithExes :: Opts -> [String] -> String -> IO [[Float]] +runTestWithExes opts exes cmd = mapM (runTestWithExe opts cmd) exes + +runTestWithExe :: Opts -> String -> String -> IO [Float] +runTestWithExe opts cmd exe = mapM (runTestOnce opts cmd exe) [1..iterations opts] + +runTestOnce :: Opts -> String -> String -> Int -> IO Float +runTestOnce opts cmd exe iteration = do + let (cmd',exe',args) = replaceExecutable exe cmd + dbg opts $ printf "replaceExecutable: %s -> %s\n" (show (cmd,exe)) (show (cmd',exe',args)) + outv opts (show iteration ++ ": " ++ cmd' ++ "\n") + t <- time opts exe' args + outv opts $ printf "\t[%ss]\n" (showtime opts t) + return t + +-- | Replace a command's first word with the specified executable. +-- If the executable is empty, the command remains unchanged. +-- If the command is empty, the executable becomes the command. +-- Return the new command string, executable, and arguments. +replaceExecutable :: String -> String -> (String,String,[String]) +replaceExecutable exe "" = (exe, exe, []) +replaceExecutable "" cmd = (cmd, w, ws) where w:ws = words $ clean cmd +replaceExecutable exe cmd = (unwords (exe:args), exe, args) where args = drop 1 $ words $ clean cmd + -- XXX might display wrong quoting here + +time :: Opts -> String -> [String] -> IO Float +time opts exe args = do + t1 <- getCurrentTime + (c, o, e) <- readProcessWithExitCode' exe args "" + t2 <- getCurrentTime + when (not $ null o) $ outvv opts $ (if verbose opts then "\n" else "") ++ o + unless (c == ExitSuccess) $ out opts $ " (error: " ++ clean e ++ ") " + return $ realToFrac $ diffUTCTime t2 t1 + +-- ^ This variant also returns a failure when the executable is missing. +readProcessWithExitCode' :: FilePath -> [String] -> String -> IO (ExitCode, String, String) +readProcessWithExitCode' exe args inp = + readProcessWithExitCode exe args inp + `catch` \(e :: IOException) -> return (ExitFailure 1, "", show e) + +printSummary :: Opts -> [String] -> [String] -> Int -> [[[Float]]] -> IO () +printSummary opts cmds exes cyc results = do + out opts $ printf "\nBest times%s:\n" (if cycles opts > 1 then " "++show cyc else "") + let t = maketable opts cmds' exes results + out opts $ TA.render id id id t + -- let outname = "benchresults" + -- writeFile (outname <.> "txt") $ TA.render id id id t + -- writeFile (outname <.> "html") $ renderHtml $ TH.css TH.defaultCss +++ TH.render stringToHtml stringToHtml stringToHtml t + where + cmds' = + case executables opts of + [] -> cmds + [e] -> [c | (c,_,_) <- map (replaceExecutable e) cmds] + _ -> map (unwords . drop 1 . words) cmds + +maketable :: Opts -> [String] -> [String] -> [[[Float]]] -> Table String String String +maketable opts rownames colnames results = Table rowhdrs colhdrs rows + where + rowhdrs = Group NoLine $ map Header $ padright rownames + colhdrs = Group SingleLine $ map Header colnames + rows = map (map (showtime opts . minimum)) results + padright ss = map (printf (printf "%%-%ds" w)) ss + where w = maximum $ map length ss + +showtime :: Opts -> (Float -> String) +showtime opts = printf $ "%." ++ show (precision opts) ++ "f" + +istest :: String -> Bool +istest s = not (null s' || ("#" `isPrefixOf` s')) where s' = clean s + +clean :: String -> String +clean = unwords . words + +out :: Opts -> String -> IO () +out _ = putStr + +outv :: Opts -> String -> IO () +outv opts s = when (verbose opts || moreVerbose opts) $ putStr s + +outvv :: Opts -> String -> IO () +outvv opts s = when (moreVerbose opts) $ putStr s + +err :: String -> IO () +err = hPutStr stderr + +dbg :: Opts -> String -> IO () +dbg opts s = when (debug opts) $ err s + diff --git a/stack.yaml b/stack.yaml new file mode 100644 --- /dev/null +++ b/stack.yaml @@ -0,0 +1,6 @@ +resolver: lts-7.4 + +packages: +- '.' + +extra-deps: [] diff --git a/test/Spec.hs b/test/Spec.hs new file mode 100644 --- /dev/null +++ b/test/Spec.hs @@ -0,0 +1,2 @@ +main :: IO () +main = return ()