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inotify: server: new data structure to keep track of changes....
inotify: server: new data structure to keep track of changes. == Rationale for the new structure == Current structure was a dictionary tree. One directory was tracked as a dictionary: - keys: file/subdir name - values: - for a file, the status (a/r/m/...) - for a subdir, the directory representing the subdir It allowed efficient lookups, no matter of the type of the terminal leaf: for part in path.split('/'): tree = tree[part] However, there is no way to represent a directory and a file with the same name because keys are conflicting in the dictionary. Concrete example: Initial state: root dir |- foo (file) |- bar (file) # data state is: {'foo': 'n', 'bar': 'n'} Remove foo: root dir |- bar (file) # Data becomes {'foo': 'r'} until next commit. Add foo, as a directory, and foo/barbar file: root dir |- bar (file) |-> foo (dir) |- barbar (file) # New state should be represented as: {'foo': {'barbar': 'a'}, 'bar': 'n'} however, the key "foo" is already used and represents the old file. The dirstate: D foo A foo/barbar cannot be represented, hence the need for a new structure. == The new structure == 'directory' class. Represents one directory level. * Notable attributes: Two dictionaries: - 'files' Maps filename -> status for the current dir. - 'dirs' Maps subdir's name -> directory object representing the subdir * methods - walk(), formerly server.walk - lookup(), old server.lookup - dir(), old server.dir This new class allows embedding all the tree walks/lookups in its own class, instead of having everything mixed together in server. Incidently, since files and directories are not stored in the same dictionaries, we are solving the previous key conflict problem. The small drawback is that lookup operation is a bit more complex: for a path a/b/c/d/e we have to check twice the leaf, if e is a directory or a file.
Benoit Boissinot - - Load All Authors

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test-http-proxy.out
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adding a
%% url for proxy, stream
streaming all changes
XXX files to transfer, XXX bytes of data
transferred XXX bytes in XXX seconds (XXX XB/sec)
updating working directory
XXX files updated, XXX files merged, XXX files removed, XXX files unresolved
checking changesets
checking manifests
crosschecking files in changesets and manifests
checking files
1 files, 1 changesets, 1 total revisions
%% url for proxy, pull
requesting all changes
adding changesets
adding manifests
adding file changes
added 1 changesets with 1 changes to 1 files
updating working directory
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
checking changesets
checking manifests
crosschecking files in changesets and manifests
checking files
1 files, 1 changesets, 1 total revisions
%% host:port for proxy
requesting all changes
adding changesets
adding manifests
adding file changes
added 1 changesets with 1 changes to 1 files
updating working directory
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
%% proxy url with user name and password
requesting all changes
adding changesets
adding manifests
adding file changes
added 1 changesets with 1 changes to 1 files
updating working directory
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
%% url with user name and password
requesting all changes
adding changesets
adding manifests
adding file changes
added 1 changesets with 1 changes to 1 files
updating working directory
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
%% bad host:port for proxy
abort: error: Connection refused
%% do not use the proxy if it is in the no list
requesting all changes
adding changesets
adding manifests
adding file changes
added 1 changesets with 1 changes to 1 files
updating working directory
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
XXX "GET http://localhost:/?pairs=0000000000000000000000000000000000000000-0000000000000000000000000000000000000000&cmd=between HTTP/1.1" - -
XXX "GET http://localhost:/?cmd=capabilities HTTP/1.1" - -
XXX "GET http://localhost:/?cmd=stream_out HTTP/1.1" - -
XXX "GET http://localhost:/?pairs=0000000000000000000000000000000000000000-0000000000000000000000000000000000000000&cmd=between HTTP/1.1" - -
XXX "GET http://localhost:/?cmd=heads HTTP/1.1" - -
XXX "GET http://localhost:/?cmd=capabilities HTTP/1.1" - -
XXX "GET http://localhost:/?bases=0000000000000000000000000000000000000000&cmd=changegroupsubset&heads=83180e7845de420a1bb46896fd5fe05294f8d629 HTTP/1.1" - -
XXX "GET http://localhost:/?pairs=0000000000000000000000000000000000000000-0000000000000000000000000000000000000000&cmd=between HTTP/1.1" - -
XXX "GET http://localhost:/?cmd=heads HTTP/1.1" - -
XXX "GET http://localhost:/?cmd=capabilities HTTP/1.1" - -
XXX "GET http://localhost:/?bases=0000000000000000000000000000000000000000&cmd=changegroupsubset&heads=83180e7845de420a1bb46896fd5fe05294f8d629 HTTP/1.1" - -
XXX "GET http://localhost:/?pairs=0000000000000000000000000000000000000000-0000000000000000000000000000000000000000&cmd=between HTTP/1.1" - -
XXX "GET http://localhost:/?cmd=heads HTTP/1.1" - -
XXX "GET http://localhost:/?cmd=capabilities HTTP/1.1" - -
XXX "GET http://localhost:/?bases=0000000000000000000000000000000000000000&cmd=changegroupsubset&heads=83180e7845de420a1bb46896fd5fe05294f8d629 HTTP/1.1" - -
XXX "GET http://localhost:/?pairs=0000000000000000000000000000000000000000-0000000000000000000000000000000000000000&cmd=between HTTP/1.1" - -
XXX "GET http://localhost:/?cmd=heads HTTP/1.1" - -
XXX "GET http://localhost:/?cmd=capabilities HTTP/1.1" - -
XXX "GET http://localhost:/?bases=0000000000000000000000000000000000000000&cmd=changegroupsubset&heads=83180e7845de420a1bb46896fd5fe05294f8d629 HTTP/1.1" - -