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|
{- git data types
-
- Copyright 2010-2012 Joey Hess <joey@kitenet.net>
-
- Licensed under the GNU GPL version 3 or higher.
-}
module Git.Types where
import Network.URI
import qualified Data.Map as M
{- Support repositories on local disk, and repositories accessed via an URL.
-
- Repos on local disk have a git directory, and unless bare, a worktree.
-
- A local repo may not have had its config read yet, in which case all
- that's known about it is its path.
-
- Finally, an Unknown repository may be known to exist, but nothing
- else known about it.
-}
data RepoLocation
= Local { gitdir :: FilePath, worktree :: Maybe FilePath }
| LocalUnknown FilePath
| Url URI
| Unknown
deriving (Show, Eq)
data Repo = Repo
{ location :: RepoLocation
, config :: M.Map String String
-- a given git config key can actually have multiple values
, fullconfig :: M.Map String [String]
, remotes :: [Repo]
-- remoteName holds the name used for this repo in remotes
, remoteName :: Maybe String
-- alternate environment to use when running git commands
, gitEnv :: Maybe [(String, String)]
} deriving (Show, Eq)
{- A git ref. Can be a sha1, or a branch or tag name. -}
newtype Ref = Ref String
deriving (Eq)
instance Show Ref where
show (Ref v) = v
{- Aliases for Ref. -}
type Branch = Ref
type Sha = Ref
type Tag = Ref
{- Types of objects that can be stored in git. -}
data ObjectType = BlobObject | CommitObject | TreeObject
deriving (Eq)
instance Show ObjectType where
show BlobObject = "blob"
show CommitObject = "commit"
show TreeObject = "tree"
readObjectType :: String -> Maybe ObjectType
readObjectType "blob" = Just BlobObject
readObjectType "commit" = Just CommitObject
readObjectType "tree" = Just TreeObject
readObjectType _ = Nothing
{- Types of blobs. -}
data BlobType = FileBlob | ExecutableBlob | SymlinkBlob
deriving (Eq)
{- Git uses magic numbers to denote the type of a blob. -}
instance Show BlobType where
show FileBlob = "100644"
show ExecutableBlob = "100755"
show SymlinkBlob = "120000"
readBlobType :: String -> Maybe BlobType
readBlobType "100644" = Just FileBlob
readBlobType "100755" = Just ExecutableBlob
readBlobType "120000" = Just SymlinkBlob
readBlobType _ = Nothing
|
