Much richer set of Darcs rev TH splices

src/Data/Revision/Local.hs

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+{- This file is part of Vervis.
+ -
+ - Written in 2016 by fr33domlover <fr33domlover@riseup.net>.
+ -
+ - ♡ Copying is an act of love. Please copy, reuse and share.
+ -
+ - The author(s) have dedicated all copyright and related and neighboring
+ - rights to this software to the public domain worldwide. This software is
+ - distributed without any warranty.
+ -
+ - You should have received a copy of the CC0 Public Domain Dedication along
+ - with this software. If not, see
+ - <http://creativecommons.org/publicdomain/zero/1.0/>.
+ -}
+
+module Data.Revision.Local
+    ( Change (..)
+    , Revision (..)
+    , Version (..)
+    )
+where
+
+import Prelude
+
+import Data.Text (Text)
+import Data.Time.Clock (UTCTime)
+
+-- | A recorded patch or tag.
+data Change = Change
+    { -- | When it was recorded.
+      cgTime  :: UTCTime
+      -- | Lowercase hex representation of its SHA1 info hash.
+    , cgHash  :: Text
+      -- | Single-line title.
+    , cgTitle :: Text
+    }
+
+-- | Given a non-empty repo, this refers to a point in its history.
+data Revision
+    -- | The last change is a tag.
+    = RevTag Change
+    -- | The last change isn't a tag, but a tag exists earlier in the history.
+    -- Specifies details of the last tag, the number of patches after that tag,
+    -- and details of the last patch.
+    | RevTagPlus Change Int Change
+    -- | There are no recorded tags. Specifies the last patch.
+    | RevPatch Change
+
+data Version = Version
+    { verSharer   :: Text
+    , verRepo     :: Text
+    , verChanges  :: Int
+    , verRevision :: Revision
+    }