record date field

src/Niv/Git/Cmd.hs

@@ -118,11 +118,13 @@ describeGit =
           Opts.<$$> "  niv add git --repo /my/custom/repo --name custom --ref foobar"
     ]
 
+data CommitInfo = CommitInfo { revision :: T.Text, date :: T.Text }
+
 gitUpdate ::
   -- | latest rev
-  (T.Text -> T.Text -> IO T.Text) ->
+  (T.Text -> T.Text -> IO CommitInfo) ->
   -- | latest rev and default ref
-  (T.Text -> IO (T.Text, T.Text)) ->
+  (T.Text -> IO (T.Text, CommitInfo)) ->
   Update () ()
 gitUpdate latestRev' defaultRefAndHEAD' = proc () -> do
   useOrSet "type" -< ("git" :: Box T.Text)
@@ -132,20 +134,22 @@ gitUpdate latestRev' defaultRefAndHEAD' = proc () -> do
     discoverRefAndRev = proc repository -> do
       refAndRev <- run defaultRefAndHEAD' -< repository
       update "ref" -< fst <$> refAndRev
-      update "rev" -< snd <$> refAndRev
+      update "rev" -< (revision . snd) <$> refAndRev
+      update "date" -< (date . snd) <$> refAndRev
       returnA -< ()
     discoverRev = proc repository -> do
       ref <- load "ref" -< ()
       rev <- run' (uncurry latestRev') -< (,) <$> repository <*> ref
-      update "rev" -< rev
+      update "rev" -< revision <$> rev
+      update "date" -< date <$> rev
       returnA -< ()
 
 -- | The "real" (IO) update
 gitUpdate' :: Update () ()
 gitUpdate' = gitUpdate latestRev defaultRefAndHEAD
 
 -- TODO: document the git operations
-latestRevInfo :: T.Text -> Maybe T.Text -> IO (T.Text, T.Text)
+latestRevInfo :: T.Text -> Maybe T.Text -> IO (T.Text, CommitInfo)
 latestRevInfo repo mref = runGits $ \git -> do
   void $ git ["init"]
   void $ git ["remote", "add", "origin", repo]
@@ -154,10 +158,10 @@ latestRevInfo repo mref = runGits $ \git -> do
   void $ git ["checkout", ref]
   git ["show", "--quiet", "--format=%H%n%aD", ref] >>= \case
     [] -> abort "Git did not produce enough output while reading commit information"
-    [rev, _date] -> do
+    [rev, dte] -> do
       unless (isRev rev) $ do
         abort $ "The revision retrieved from git does not look like a revision: '" <> rev <> "'."
-      pure (ref, rev)
+      pure (ref, CommitInfo { revision = rev, date = dte } )
     output ->
       abort $ T.unlines $
         ["Git produced too much output while reading commit information:"] <> output
@@ -166,14 +170,14 @@ latestRevInfo repo mref = runGits $ \git -> do
       Just l -> pure (T.strip l)
       Nothing -> abort $ T.unlines $ ["could not parse default ref: "] <> ls
 
-latestRev :: T.Text -> T.Text -> IO T.Text
+latestRev :: T.Text -> T.Text -> IO CommitInfo
 latestRev repo ref = snd <$> latestRevInfo repo (Just ref)
 
 -- TODO: test this
 defaultRefAndHEAD ::
   -- | the repository
   T.Text ->
-  IO (T.Text, T.Text)
+  IO (T.Text, CommitInfo)
 defaultRefAndHEAD repo = latestRevInfo repo Nothing
 
 abortNoRev :: [T.Text] -> T.Text -> IO a

src/Niv/Git/Test.hs

@@ -65,8 +65,10 @@ test_gitUpdateRev = do
     $ error
     $ "State mismatch: " <> show actualState
   where
-    latestRev' _ _ = pure "some-other-rev"
-    defaultRefAndHEAD' _ = pure ("some-ref", "some-rev")
+    latestRev' _ _ = pure someOtherCommit
+    someCommit = CommitInfo { revision = "some-rev", date = "some-date" }
+    someOtherCommit = CommitInfo { revision = "some-other-rev", date = "some-other-date" }
+    defaultRefAndHEAD' _ = pure ("some-ref", someCommit)
     initialState =
       HMS.fromList
         [("repo", (Free, "git@github.com:nmattia/niv"))]
@@ -75,6 +77,7 @@ test_gitUpdateRev = do
         [ ("repo", "git@github.com:nmattia/niv"),
           ("ref", "some-ref"),
           ("rev", "some-other-rev"),
+          ("date", "some-other-date"),
           ("type", "git")
         ]
 
@@ -115,8 +118,10 @@ test_gitCalledOnce = do
     $ error
     $ "State mismatch: " <> show actualState
   where
-    latestRev' _ _ = pure "some-other-rev"
-    defaultRefAndHEAD' _ = pure ("some-ref", "some-rev")
+    latestRev' _ _ = pure someOtherCommit
+    someCommit = CommitInfo { revision = "some-rev", date = "some-date" }
+    someOtherCommit = CommitInfo { revision = "some-other-rev", date = "some-other-date" }
+    defaultRefAndHEAD' _ = pure ("some-ref", someCommit)
     initialState =
       HMS.fromList
         [("repo", (Free, "git@github.com:nmattia/niv"))]
@@ -125,5 +130,6 @@ test_gitCalledOnce = do
         [ ("repo", "git@github.com:nmattia/niv"),
           ("ref", "some-ref"),
           ("rev", "some-other-rev"),
+          ("date", "some-other-date"),
           ("type", "git")
         ]