2019-01-01 19:39:45 +00:00
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{- git-annex uuid log
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2011-03-27 20:55:43 +00:00
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-
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2011-10-06 19:31:25 +00:00
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- uuid.log stores a list of known uuids, and their descriptions.
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-
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2019-01-09 18:00:35 +00:00
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- Copyright 2010-2019 Joey Hess <id@joeyh.name>
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2010-10-27 20:53:54 +00:00
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-
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2019-03-13 19:48:14 +00:00
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- Licensed under the GNU AGPL version 3 or higher.
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2010-10-12 17:10:07 +00:00
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-}
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2011-10-15 20:21:08 +00:00
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module Logs.UUID (
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add ConfigMonitor thread
Monitors git-annex branch for changes, which are noticed by the Merger
thread whenever the branch ref is changed (either due to an incoming push,
or a local change), and refreshes cached config values for modified config
files.
Rate limited to run no more often than once per minute. This is important
because frequent git-annex branch changes happen when files are being
added, or transferred, etc.
A primary use case is that, when preferred content changes are made,
and get pushed to remotes, the remotes start honoring those settings.
Other use cases include propigating repository description and trust
changes to remotes, and learning when a remote has added a new special
remote, so the webapp can present the GUI to enable that special remote
locally.
Also added a uuid.log cache. All other config files already had caches.
2012-10-20 20:37:06 +00:00
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uuidLog,
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2010-10-16 20:15:31 +00:00
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describeUUID,
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2019-01-01 19:39:45 +00:00
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uuidDescMap,
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uuidDescMapLoad
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2010-10-12 17:10:07 +00:00
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) where
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add ConfigMonitor thread
Monitors git-annex branch for changes, which are noticed by the Merger
thread whenever the branch ref is changed (either due to an incoming push,
or a local change), and refreshes cached config values for modified config
files.
Rate limited to run no more often than once per minute. This is important
because frequent git-annex branch changes happen when files are being
added, or transferred, etc.
A primary use case is that, when preferred content changes are made,
and get pushed to remotes, the remotes start honoring those settings.
Other use cases include propigating repository description and trust
changes to remotes, and learning when a remote has added a new special
remote, so the webapp can present the GUI to enable that special remote
locally.
Also added a uuid.log cache. All other config files already had caches.
2012-10-20 20:37:06 +00:00
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import Types.UUID
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2016-01-20 20:36:33 +00:00
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import Annex.Common
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2017-08-14 17:55:38 +00:00
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import Annex.VectorClock
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add ConfigMonitor thread
Monitors git-annex branch for changes, which are noticed by the Merger
thread whenever the branch ref is changed (either due to an incoming push,
or a local change), and refreshes cached config values for modified config
files.
Rate limited to run no more often than once per minute. This is important
because frequent git-annex branch changes happen when files are being
added, or transferred, etc.
A primary use case is that, when preferred content changes are made,
and get pushed to remotes, the remotes start honoring those settings.
Other use cases include propigating repository description and trust
changes to remotes, and learning when a remote has added a new special
remote, so the webapp can present the GUI to enable that special remote
locally.
Also added a uuid.log cache. All other config files already had caches.
2012-10-20 20:37:06 +00:00
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import qualified Annex
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2011-10-04 04:40:47 +00:00
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import qualified Annex.Branch
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2013-08-29 22:51:22 +00:00
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import Logs
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2011-10-15 20:21:08 +00:00
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import Logs.UUIDBased
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2011-10-28 23:49:01 +00:00
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import qualified Annex.UUID
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2010-10-12 19:48:00 +00:00
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2018-04-22 17:28:31 +00:00
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import qualified Data.Map.Strict as M
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convert old uuid-based log parsers to attoparsec
This preserves the workaround for the old bug that caused NoUUID items
to be stored in the log, prefixing log lines with " ". It's now handled
implicitly, by using takeWhile1 (/= ' ') to get the uuid.
There is a behavior change from the old parser, which split the value
into words and then recombined it. That meant that "foo bar" and "foo\tbar"
came out as "foo bar". That behavior was not documented, and seems
surprising; it meant that after a git-annex describe here "foo bar",
you wouldn't get that same string back out when git-annex displayed repo
descriptions.
Otoh, some other parsers relied on the old behavior, and the attoparsec
rewrites had to deal with the issue themselves...
For group.log, there are some edge cases around the user providing a
group name with a leading or trailing space. The old parser would ignore
such excess whitespace. The new parser does too, because the alternative
is to refuse to parse something like " group1 group2 " due to excess
whitespace, which would be even more confusing behavior.
The only git-annex branch log file that is not converted to attoparsec
and bytestring-builder now is transitions.log.
2019-01-10 18:39:36 +00:00
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import qualified Data.ByteString.Lazy as L
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import qualified Data.Attoparsec.ByteString.Lazy as A
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2017-08-14 17:55:38 +00:00
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2011-10-06 19:31:25 +00:00
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{- Records a description for a uuid in the log. -}
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2019-01-01 19:39:45 +00:00
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describeUUID :: UUID -> UUIDDesc -> Annex ()
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2011-10-06 19:31:25 +00:00
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describeUUID uuid desc = do
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2017-08-14 17:55:38 +00:00
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c <- liftIO currentVectorClock
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add ConfigMonitor thread
Monitors git-annex branch for changes, which are noticed by the Merger
thread whenever the branch ref is changed (either due to an incoming push,
or a local change), and refreshes cached config values for modified config
files.
Rate limited to run no more often than once per minute. This is important
because frequent git-annex branch changes happen when files are being
added, or transferred, etc.
A primary use case is that, when preferred content changes are made,
and get pushed to remotes, the remotes start honoring those settings.
Other use cases include propigating repository description and trust
changes to remotes, and learning when a remote has added a new special
remote, so the webapp can present the GUI to enable that special remote
locally.
Also added a uuid.log cache. All other config files already had caches.
2012-10-20 20:37:06 +00:00
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Annex.Branch.change uuidLog $
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2019-02-21 17:43:21 +00:00
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buildLogOld buildUUIDDesc . changeLog c uuid desc . parseUUIDLog
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2010-10-14 03:18:58 +00:00
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add ConfigMonitor thread
Monitors git-annex branch for changes, which are noticed by the Merger
thread whenever the branch ref is changed (either due to an incoming push,
or a local change), and refreshes cached config values for modified config
files.
Rate limited to run no more often than once per minute. This is important
because frequent git-annex branch changes happen when files are being
added, or transferred, etc.
A primary use case is that, when preferred content changes are made,
and get pushed to remotes, the remotes start honoring those settings.
Other use cases include propigating repository description and trust
changes to remotes, and learning when a remote has added a new special
remote, so the webapp can present the GUI to enable that special remote
locally.
Also added a uuid.log cache. All other config files already had caches.
2012-10-20 20:37:06 +00:00
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{- The map is cached for speed. -}
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2019-01-01 19:39:45 +00:00
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uuidDescMap :: Annex UUIDDescMap
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uuidDescMap = maybe uuidDescMapLoad return =<< Annex.getState Annex.uuiddescmap
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add ConfigMonitor thread
Monitors git-annex branch for changes, which are noticed by the Merger
thread whenever the branch ref is changed (either due to an incoming push,
or a local change), and refreshes cached config values for modified config
files.
Rate limited to run no more often than once per minute. This is important
because frequent git-annex branch changes happen when files are being
added, or transferred, etc.
A primary use case is that, when preferred content changes are made,
and get pushed to remotes, the remotes start honoring those settings.
Other use cases include propigating repository description and trust
changes to remotes, and learning when a remote has added a new special
remote, so the webapp can present the GUI to enable that special remote
locally.
Also added a uuid.log cache. All other config files already had caches.
2012-10-20 20:37:06 +00:00
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2011-10-28 23:49:01 +00:00
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{- Read the uuidLog into a simple Map.
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-
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- The UUID of the current repository is included explicitly, since
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2019-01-01 19:39:45 +00:00
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- it may not have been described and otherwise would not appear. -}
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uuidDescMapLoad :: Annex UUIDDescMap
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uuidDescMapLoad = do
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convert old uuid-based log parsers to attoparsec
This preserves the workaround for the old bug that caused NoUUID items
to be stored in the log, prefixing log lines with " ". It's now handled
implicitly, by using takeWhile1 (/= ' ') to get the uuid.
There is a behavior change from the old parser, which split the value
into words and then recombined it. That meant that "foo bar" and "foo\tbar"
came out as "foo bar". That behavior was not documented, and seems
surprising; it meant that after a git-annex describe here "foo bar",
you wouldn't get that same string back out when git-annex displayed repo
descriptions.
Otoh, some other parsers relied on the old behavior, and the attoparsec
rewrites had to deal with the issue themselves...
For group.log, there are some edge cases around the user providing a
group name with a leading or trailing space. The old parser would ignore
such excess whitespace. The new parser does too, because the alternative
is to refuse to parse something like " group1 group2 " due to excess
whitespace, which would be even more confusing behavior.
The only git-annex branch log file that is not converted to attoparsec
and bytestring-builder now is transitions.log.
2019-01-10 18:39:36 +00:00
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m <- simpleMap . parseUUIDLog <$> Annex.Branch.get uuidLog
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2011-10-28 23:49:01 +00:00
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u <- Annex.UUID.getUUID
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2019-01-01 19:39:45 +00:00
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let m' = M.insertWith preferold u mempty m
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Annex.changeState $ \s -> s { Annex.uuiddescmap = Just m' }
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add ConfigMonitor thread
Monitors git-annex branch for changes, which are noticed by the Merger
thread whenever the branch ref is changed (either due to an incoming push,
or a local change), and refreshes cached config values for modified config
files.
Rate limited to run no more often than once per minute. This is important
because frequent git-annex branch changes happen when files are being
added, or transferred, etc.
A primary use case is that, when preferred content changes are made,
and get pushed to remotes, the remotes start honoring those settings.
Other use cases include propigating repository description and trust
changes to remotes, and learning when a remote has added a new special
remote, so the webapp can present the GUI to enable that special remote
locally.
Also added a uuid.log cache. All other config files already had caches.
2012-10-20 20:37:06 +00:00
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return m'
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2012-11-11 04:51:07 +00:00
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where
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preferold = flip const
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convert old uuid-based log parsers to attoparsec
This preserves the workaround for the old bug that caused NoUUID items
to be stored in the log, prefixing log lines with " ". It's now handled
implicitly, by using takeWhile1 (/= ' ') to get the uuid.
There is a behavior change from the old parser, which split the value
into words and then recombined it. That meant that "foo bar" and "foo\tbar"
came out as "foo bar". That behavior was not documented, and seems
surprising; it meant that after a git-annex describe here "foo bar",
you wouldn't get that same string back out when git-annex displayed repo
descriptions.
Otoh, some other parsers relied on the old behavior, and the attoparsec
rewrites had to deal with the issue themselves...
For group.log, there are some edge cases around the user providing a
group name with a leading or trailing space. The old parser would ignore
such excess whitespace. The new parser does too, because the alternative
is to refuse to parse something like " group1 group2 " due to excess
whitespace, which would be even more confusing behavior.
The only git-annex branch log file that is not converted to attoparsec
and bytestring-builder now is transitions.log.
2019-01-10 18:39:36 +00:00
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parseUUIDLog :: L.ByteString -> Log UUIDDesc
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2019-02-21 17:43:21 +00:00
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parseUUIDLog = parseLogOld (UUIDDesc <$> A.takeByteString)
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