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{-
Copyright (C) 2022 Yuchen Pei.
This file is part of fsd.
fsd is free software: you can redistribute it and/or modify it under
the terms of the GNU Affero General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
fsd is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero General
Public License for more details.
You should have received a copy of the GNU Affero General Public
License along with fsd. If not, see <https://www.gnu.org/licenses/>.
-}
{-# LANGUAGE ImportQualifiedPost #-}
module FSD.ChangeLog where
import Data.Generics
import Data.Time
import Data.Text qualified as T
import Debian.Changes
import Debian.Version
import Text.Regex.TDFA
import FSD.Types
readChangeLog :: String -> Maybe ChangeLogEntry
readChangeLog raw = case parseEntry raw of
Left _ -> Nothing
Right (entry, _) -> Just entry
-- Debian version is an abstract type with no constructor, hence the ugly hack.
getVersion :: DebianVersion -> Maybe String
getVersion v =
let match = show v =~ ("\".*\"" :: String)
in if null match then Nothing else Just $ init $ tail match
convertChangeLogEntry :: ChangeLogEntry -> Maybe FSDChangeLogEntry
convertChangeLogEntry entry = do
version <- getVersion $ logVersion entry
time <- parseTime' $ logDate entry
return $
FSDChangeLogEntry
(T.pack $ logPackage entry)
(T.pack version)
(T.pack $ logWho entry)
time
where
parseTime' raw =
orElse
(parseTimeM False defaultTimeLocale "%a, %d %b %Y %T %Z" raw)
(parseTimeM False defaultTimeLocale "%a, %e %b %Y %T %Z" raw)
getChangeLogEntry :: String -> Maybe FSDChangeLogEntry
getChangeLogEntry raw = readChangeLog raw >>= convertChangeLogEntry
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