d2576e5f1a
For NotifyChanges and also for the fallthrough case where git-annex-shell passes a command off to git-shell, proxying is currently ignored. So every remote that is accessed via a proxy will be treated as the same git repository. Every other command listed in cmdsMap will need to check if Annex.proxyremote is set, and if so handle the proxying appropriately. Probably only P2PStdio will need to support proxying. For now, everything else refuses to work when proxying. The part of that I don't like is that there's the possibility a command later gets added to the list that doesn't check proxying. When proxying is not enabled, it's important that git-annex-shell not leak information that it would not have exposed before. Such as the names or uuids of remotes. I decided that, in the case where a repository used to have proxying enabled, but no longer supports any proxies, it's ok to give the user a clear error message indicating that proxying is not configured, rather than a confusing uuid mismatch message. Similarly, if a repository has proxying enabled, but not for the requested repository, give a clear error message. A tricky thing here is how to handle the case where there is more than one remote, with proxying enabled, with the specified uuid. One way to handle that would be to plumb the proxyRemoteName all the way through from the remote git-annex to git-annex-shell, eg as a field, and use only a remote with the same name. That would be very intrusive though. Instead, I decided to let the proxy pick which remote it uses to access a given Remote. And so it picks the least expensive one. The client after all doesn't necessarily know any details about the proxy's configuration. This does mean though, that if the least expensive remote is not accessible, but another remote would have worked, an access via the proxy will fail.
146 lines
4.8 KiB
Haskell
146 lines
4.8 KiB
Haskell
{- git-annex command data types
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-
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- Copyright 2010-2021 Joey Hess <id@joeyh.name>
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-
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- Licensed under the GNU AGPL version 3 or higher.
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-}
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{-# LANGUAGE RankNTypes #-}
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module Types.Command where
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import Data.Ord
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import Options.Applicative.Types (Parser)
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import Options.Applicative.Builder (InfoMod)
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import Types
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import Types.DeferredParse
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import Types.ActionItem
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{- A command runs in these stages.
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-
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- a. The parser stage parses the command line and generates a CommandSeek
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- action. -}
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type CommandParser = Parser CommandSeek
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{- b. The check stage runs checks, that error out if
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- anything prevents the command from running. -}
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data CommandCheck = CommandCheck { idCheck :: CommandCheckId, runCheck :: Annex () }
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{- c. The seek stage is passed input from the parser, looks through
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- the repo to find things to act on (ie, new files to add), and
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- runs commandAction to handle all necessary actions. -}
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type CommandSeek = Annex ()
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{- d. The start stage is run before anything is output, is passed some
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- value from the seek stage, and can check if anything needs to be
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- done, and early abort if not. It should run quickly and should
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- not modify Annex state or output anything. -}
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type CommandStart = Annex (Maybe (StartMessage, CommandPerform))
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{- e. The perform stage is run after a message is printed about the command
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- being run, and it should be where the bulk of the work happens. -}
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type CommandPerform = Annex (Maybe CommandCleanup)
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{- f. The cleanup stage is run only if the perform stage succeeds, and it
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- returns the overall success/fail of the command. -}
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type CommandCleanup = Annex Bool
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{- Input that was seeked on to make an ActionItem. Eg, the input filename,
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- or directory name. -}
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newtype SeekInput = SeekInput { fromSeekInput :: [String] }
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deriving (Show)
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{- Message that is displayed when starting to perform an action on
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- something. The String is typically the name of the command or action
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- being performed.
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-}
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data StartMessage
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= StartMessage String ActionItem SeekInput
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| StartUsualMessages String ActionItem SeekInput
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-- ^ Like StartMessage, but makes sure to enable usual message
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-- display in case it was disabled by cmdnomessages.
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| StartNoMessage ActionItem
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-- ^ Starts, without displaying any message but also without
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-- disabling display of any of the usual messages.
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| CustomOutput ActionItem
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-- ^ Prevents any start, end, or other usual messages from
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-- being displayed, letting a command output its own custom format.
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deriving (Show)
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instance MkActionItem StartMessage where
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mkActionItem (StartMessage _ ai _) = ai
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mkActionItem (StartUsualMessages _ ai _) = ai
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mkActionItem (StartNoMessage ai) = ai
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mkActionItem (CustomOutput ai) = ai
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{- A command is defined by specifying these things. -}
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data Command = Command
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{ cmdcheck :: [CommandCheck]
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-- ^ check stage
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, cmdnocommit :: Bool
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-- ^ don't commit journalled state changes
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, cmdnomessages :: Bool
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-- ^ don't output normal messages
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, cmdname :: String
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, cmdparamdesc :: CmdParamsDesc
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-- ^ description of params for usage
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, cmdsection :: CommandSection
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, cmddesc :: String
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-- ^ description of command for usage
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, cmdparser :: CommandParser
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-- ^ command line parser
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, cmdinfomod :: forall a. InfoMod a
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-- ^ command-specific modifier for ParserInfo
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, cmdannexoptions :: [AnnexOption]
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-- ^ additional options not parsed by the CommandParser
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, cmdnorepo :: Maybe (Parser (IO ()))
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-- ^used when not in a repo
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}
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{- Command-line parameters, after the command is selected and options
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- are parsed. -}
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type CmdParams = [String]
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type CmdParamsDesc = String
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{- CommandCheck functions can be compared using their unique id. -}
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instance Eq CommandCheck where
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a == b = idCheck a == idCheck b
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instance Eq Command where
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a == b = cmdname a == cmdname b
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{- Order commands by name. -}
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instance Ord Command where
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compare = comparing cmdname
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{- The same sections are listed in doc/git-annex.mdwn -}
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data CommandSection
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= SectionCommon
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| SectionSetup
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| SectionMaintenance
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| SectionQuery
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| SectionMetaData
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| SectionUtility
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| SectionPlumbing
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| SectionTesting
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| SectionAddOn
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deriving (Eq, Ord, Enum, Bounded)
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descSection :: CommandSection -> String
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descSection SectionCommon = "Commonly used commands"
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descSection SectionSetup = "Repository setup commands"
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descSection SectionMaintenance = "Repository maintenance commands"
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descSection SectionQuery = "Query commands"
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descSection SectionMetaData = "Metadata commands"
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descSection SectionUtility = "Utility commands"
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descSection SectionPlumbing = "Plumbing commands"
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descSection SectionTesting = "Testing commands"
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descSection SectionAddOn = "Addon commands"
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newtype DryRun = DryRun Bool
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deriving (Show)
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data CommandCheckId
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= CheckNotBareRepo
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| RepoExists
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| NoDaemonRunning
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| GitAnnexShellOk
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| GitAnnexShellNotProxyable
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deriving (Show, Ord, Eq)
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