-- | This module contains Version of Ampersand
module Database.Design.Ampersand.Basics.Version (ampersandVersionStr, ampersandVersionWithoutBuildTimeStr, fatalMsg) where

import Database.Design.Ampersand.Basics.BuildInfo_Generated

-- | a function to create error message in a structured way, containing the version of Ampersand.
--   It throws an error, showing a (module)name and a number. This makes debugging pretty easy.
fatalMsg :: String -> Int -> String -> a
fatalMsg haskellModuleName lineNr msg
 = error ("!fatal "++show lineNr++" (module "++haskellModuleName++") "++ampersandVersionWithoutBuildTimeStr++"\n  "++
            let maxLen = 1500 -- This trick is to make sure the process is terminated after the error.
                              -- If the string is too long, it seems that the sentinel `hangs`.
                              -- But what is too long???
            in case drop maxLen msg of
                [] -> msg
                _  -> take maxLen msg ++"\n<The rest of error message has been cut off.>"
           )

-- | String, containing the Ampersand version, including the build timestamp.
ampersandVersionStr :: String
ampersandVersionStr = ampersandVersionWithoutBuildTimeStr ++", build time: "++buildTimeStr

-- | String, containing the Ampersand version
ampersandVersionWithoutBuildTimeStr :: String
ampersandVersionWithoutBuildTimeStr = "Ampersand v"++cabalVersionStr++"["++gitInfoStr++"]"
{-
   #1.#2.#3[$gitInfo] : #1 major version; #2 student release version; #3 production fix version (normally 0 );
   $gitInfo: "branch:SHA", followed by a '*' if the working copy was dirty: e.g. "master:0eea5e3*" 
-}