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| author |  Joey Hess <joey@kitenet.net> | 2014-03-02 18:01:07 -0400 |
|---|---|---|
| committer | Joey Hess <joey@kitenet.net> | 2014-03-02 20:11:58 -0400 |
| commit | 66c4abb748f3982ef334a3320e49bfc6647e87d9 (patch) | |
| tree | 1785f2bee2250d74a01c5de2e06b8b0b65822f45 /Types/MetaData.hs | |
| parent | e916f8028ce1f90e851166b35f3bcec976aa09b3 (diff) | |
pre-commit-annex hook script to automatically extract metadata from lots of types of files
Using the extract(1) program to do the heavy lifting.
Decided to make git-annex run pre-commit-annex when committing. Since
git-annex pre-commit also runs it, it'll be run when git commit is run too,
via the pre-commit hook. This basically gives back the pre-commit hook
that git-annex took away. The implementation avoids repeatedly looking
for the hook script when the assistant is running and committing
repeatedly; only checks if the hook is available once.
To make the script simpler, made git-annex metadata -s field?=value
only set a field when it's not already got a value.
This commit was sponsored by bak.
Diffstat (limited to 'Types/MetaData.hs')
| -rw-r--r-- | Types/MetaData.hs | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/Types/MetaData.hs b/Types/MetaData.hs index 6f8a300b2..c37b31c51 100644 --- a/Types/MetaData.hs +++ b/Types/MetaData.hs @@ -219,6 +219,7 @@ data ModMeta = AddMeta MetaField MetaValue | DelMeta MetaField MetaValue | SetMeta MetaField MetaValue -- removes any existing values + | MaybeSetMeta MetaField MetaValue -- when field has no existing value {- Applies a ModMeta, generating the new MetaData. - Note that the new MetaData does not include all the @@ -229,12 +230,16 @@ modMeta _ (DelMeta f oldv) = updateMetaData f (unsetMetaValue oldv) emptyMetaDat modMeta m (SetMeta f v) = updateMetaData f v $ foldr (updateMetaData f) emptyMetaData $ map unsetMetaValue $ S.toList $ currentMetaDataValues f m +modMeta m (MaybeSetMeta f v) + | S.null (currentMetaDataValues f m) = updateMetaData f v emptyMetaData + | otherwise = emptyMetaData -{- Parses field=value, field+=value, field-=value -} +{- Parses field=value, field+=value, field-=value, field?=value -} parseModMeta :: String -> Either String ModMeta parseModMeta p = case lastMaybe f of Just '+' -> AddMeta <$> mkMetaField f' <*> v Just '-' -> DelMeta <$> mkMetaField f' <*> v + Just '?' -> MaybeSetMeta <$> mkMetaField f' <*> v _ -> SetMeta <$> mkMetaField f <*> v where (f, sv) = separate (== '=') p |