upstream/mercurial-mirror Files · tests/readlink.py

wireprotov2: define and implement "manifestdata" command...

wireprotov2: define and implement "manifestdata" command The added command can be used for obtaining manifest data. Given a manifest path and set of manifest nodes, data about manifests can be retrieved. Unlike changeset data, we wish to emit deltas to describe manifest revisions. So the command uses the relatively new API for building delta requests and emitting them. The code calls into deltaparent(), which I'm not very keen of. There's still work to be done in delta generation land so implementation details of storage (e.g. exactly one delta is stored/available) don't creep into higher levels. But we can worry about this later (there is already a TODO on imanifestorage tracking this). On the subject of parent deltas, the server assumes parent revisions exist on the receiving end. This is obviously wrong for shallow clone. I've added TODOs to add a mechanism to the command to allow clients to specify desired behavior. This shouldn't be too difficult to implement. Another big change is that the client must explicitly request manifest nodes to retrieve. This is a major departure from "getbundle," where the server derives relevant manifests as it iterates changesets and sends them automatically. As implemented, the client must transmit each requested node to the server. At 20 bytes per node, we're looking at 2 MB per 100,000 nodes. Plus wire encoding overhead. This isn't ideal for clients with limited upload bandwidth. I plan to address this in the future by allowing alternate mechanisms for defining the revisions to retrieve. One idea is to define a range of changeset revisions whose manifest revisions to retrieve (similar to how "changesetdata" works). We almost certainly want an API to look up an individual manifest by node. And that's where I've chosen to start with the implementation. Again, a theme of this early exchangev2 work is I want to start by building primitives for accessing raw repository data first and see how far we can get with those before we need more complexity. Differential Revision: https://phab.mercurial-scm.org/D4488

Pulkit Goyal - - Load All Authors

File last commit:

r29485:6a98f940 default


                r39673:c7a7c7e8

default

Download file

             readlink.py
        
                    17 lines
            
             | 324 B
            
                | text/x-python
            
             |
                PythonLexer
            
             / tests / readlink.py
          
                    History
                
                 |
                  Source
                 | Raw
                 |Copy content
                 |Copy permalink

        Thomas Arendsen Hein
    
Use common readlink.py instead of own implementations per test script.

              r5683
            
      #!/usr/bin/env python

        Pulkit Goyal
    
py3: make files use absolute_import and print_function...

              r29485
            
      from __future__ import absolute_import, print_function

        timeless
    
readlink: use print_function

              r29175
            
        Pulkit Goyal
    
py3: make files use absolute_import and print_function...

              r29485
            
      import errno

      import os

      import sys

        Thomas Arendsen Hein
    
Use common readlink.py instead of own implementations per test script.

              r5683
            
      for f in sys.argv[1:]:

          try:

        timeless
    
readlink: use print_function

              r29175
            
              print(f, '->', os.readlink(f))

        Gregory Szorc
    
global: mass rewrite to use modern exception syntax...

              r25660
            
          except OSError as err:

        Matt Mackall
    
many, many trivial check-code fixups

              r10282
            
              if err.errno != errno.EINVAL:

                  raise

        timeless
    
readlink: use print_function

              r29175
            
              print(f, '->', f, 'not a symlink')

        Thomas Arendsen Hein
    
Use common readlink.py instead of own implementations per test script.

              r5683
            
      sys.exit(0)

	Site-wide shortcuts
/	Use quick search box
g h	Goto home page
g g	Goto my private gists page
g G	Goto my public gists page
g 0-9	Goto bookmarked items from 0-9
n r	New repository page
n g	New gist page

	Repositories
g s	Goto summary page
g c	Goto changelog page
g f	Goto files page
g F	Goto files page with file search activated
g p	Goto pull requests page
g o	Goto repository settings
g O	Goto repository access permissions settings
t s	Toggle sidebar on some pages

Thomas Arendsen Hein Use common readlink.py instead of own implementations per test script.	r5683	#!/usr/bin/env python

Pulkit Goyal py3: make files use absolute_import and print_function...	r29485	from __future__ import absolute_import, print_function
timeless readlink: use print_function	r29175
Pulkit Goyal py3: make files use absolute_import and print_function...	r29485	import errno
		import os
		import sys
Thomas Arendsen Hein Use common readlink.py instead of own implementations per test script.	r5683
		for f in sys.argv[1:]:
		try:
timeless readlink: use print_function	r29175	print(f, '->', os.readlink(f))
Gregory Szorc global: mass rewrite to use modern exception syntax...	r25660	except OSError as err:
Matt Mackall many, many trivial check-code fixups	r10282	if err.errno != errno.EINVAL:
		raise
timeless readlink: use print_function	r29175	print(f, '->', f, 'not a symlink')
Thomas Arendsen Hein Use common readlink.py instead of own implementations per test script.	r5683
		sys.exit(0)