quickbench (empty) → 1.0
raw patch · 10 files changed
+1369/−0 lines, 10 filesdep +basedep +containersdep +directorysetup-changed
Dependencies added: base, containers, directory, docopt, pretty-show, process, quickbench, safe, split, tabular, time
Files
- CHANGES +20/−0
- LICENSE +674/−0
- README.md +191/−0
- Setup.hs +2/−0
- app/Main.hs +7/−0
- quickbench.1 +141/−0
- quickbench.cabal +66/−0
- src/QuickBench.hs +260/−0
- stack.yaml +6/−0
- test/Spec.hs +2/−0
+ CHANGES view
@@ -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
+ LICENSE view
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Of course, your program's commands+might be different; for a GUI interface, you would use an "about box".++ You should also get your employer (if you work as a programmer) or school,+if any, to sign a "copyright disclaimer" for the program, if necessary.+For more information on this, and how to apply and follow the GNU GPL, see+<http://www.gnu.org/licenses/>.++ The GNU General Public License does not permit incorporating your program+into proprietary programs. 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+<http://www.gnu.org/philosophy/why-not-lgpl.html>.
+ README.md view
@@ -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] [<cmd>...]++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)+```
+ Setup.hs view
@@ -0,0 +1,2 @@+import Distribution.Simple+main = defaultMain
+ app/Main.hs view
@@ -0,0 +1,7 @@+module Main where++import System.Exit+import QuickBench (defaultMain)++main :: IO ()+main = defaultMain >>= maybe exitSuccess die
+ quickbench.1 view
@@ -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]\ [<cmd>...]\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 <simon@joyful.com>.
+ quickbench.cabal view
@@ -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
+ src/QuickBench.hs view
@@ -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] [<cmd>...]++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+
+ stack.yaml view
@@ -0,0 +1,6 @@+resolver: lts-7.4++packages:+- '.'++extra-deps: []
+ test/Spec.hs view
@@ -0,0 +1,2 @@+main :: IO ()+main = return ()