Tool to transform OLTP database schemas to OLAP database schemas automatically
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ringo/ringo/src/Ringo/ArgParser.hs

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4.8 KiB

{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE RecordWildCards #-}
module Ringo.ArgParser (ProgArgs(..), parseArgs) where
import qualified Data.Text as Text
import Data.List (intercalate)
import Data.Monoid ((<>))
import Options.Applicative
import System.Environment (getProgName)
import Ringo.Types
data ProgArgs = ProgArgs
{ progSettings :: Settings
, progInputFile :: FilePath
, progOutputDir :: FilePath
} deriving (Eq, Show)
textOption :: Mod OptionFields String -> Parser Text.Text
textOption o = Text.pack <$> strOption o
settingsParser :: Parser Settings
settingsParser = let Settings {..} = defSettings
in Settings
<$> textOption (long "dim-prefix"
<> short 'd'
<> value (Text.unpack settingDimPrefix)
<> showDefault
<> help "Prefix for dimension tables")
<*> textOption (long "fact-prefix"
<> short 'f'
<> value (Text.unpack settingFactPrefix)
<> showDefault
<> help "Prefix for fact tables")
<*> minorOption "fact-infix"
settingFactInfix
"Infix for fact tables"
<*> option auto (let timeunits = map show [Second ..]
in long "timeunit"
<> short 't'
<> value settingTimeUnit
<> showDefault
<> completeWith timeunits
<> help ("Time unit granularity for fact tables. Possible values: "
++ intercalate ", " timeunits))
<*> minorOption "avg-count-col-suffix"
settingAvgCountColumnSuffix
"Suffix for average count columns"
<*> minorOption "avg-sum-col-suffix"
settingAvgSumColumnSuffix
"Suffix for average sum columns"
<*> minorOption "dim-id-col-name"
settingDimTableIdColumnName
"Name of dimension table id columns"
<*> minorOption "dim-id-col-type"
settingDimTableIdColumnType
"Type of dimension table id columns"
<*> minorOption "fact-count-col-type"
settingFactCountColumnType
"Type of fact table count columns"
<*> option auto (long "fact-count-distinct-error-rate"
<> hidden
<> value settingFactCountDistinctErrorRate
<> showDefault
<> help "Error rate for count distinct calulations")
<*> minorOption "dependencies-json-file"
settingDependenciesJSONFileName
"Name of the output dependencies json file"
<*> minorOption "facts-json-file"
settingFactsJSONFileName
"Name of the output facts json file"
<*> minorOption "dimensions-json-file"
settingDimensionsJSONFileName
"Name of the output dimensions json file"
<*> option auto (long "foreign-key-id-coalesce-val"
<> hidden
<> value settingForeignKeyIdCoalesceValue
<> showDefault
<> help "Value to coalease missing foriegn key ids to, in fact tables")
<*> minorOption "tablename-suffix-template"
settingTableNameSuffixTemplate
"Suffix template for table names in SQL"
where
minorOption longDesc defValue helpTxt =
textOption (long longDesc
<> hidden
<> value (Text.unpack defValue)
<> showDefault
<> help helpTxt)
progArgsParser :: Parser ProgArgs
progArgsParser =
ProgArgs
<$> settingsParser
<*> argument str (metavar "INPUT"
<> action "file"
<> help "Input file")
<*> argument str (metavar "OUTPUT"
<> action "directory"
<> help "Output directory")
versionParser :: String -> Parser (a -> a)
versionParser progName = infoOption (progName ++ " " ++ version)
(long "version"
<> short 'v'
<> help "Print version information")
where
version = "0.1.0"
parseArgs :: IO ProgArgs
parseArgs = do
progName <- getProgName
execParser $
info (helper <*> versionParser progName <*> progArgsParser)
(fullDesc
<> progDesc "Tool to transform Postgres OLTP schemas to OLAP star schemas automatically"
<> header (progName ++ " - OLTP to OLAP schema transformer for Postgres")
<> footer "© 2015-2017 Quintype Inc, Nilenso Software LLP, Abhinav Sarkar. http://github.com/abhin4v/ringo")