Mercurial > hg
view tests/autodiff.py @ 39641:aa7e312375cf
wireprotov2: let clients drive delta behavior
Previously, the "manifestdata" and "filedata" commands assumed the
receiver had all parent revisions for requested nodes. Unless the
revision had no parents, they emitted a delta instead of a fulltext.
This strategy isn't appropriate for shallow clones and for clients
that only want to access fulltext revision data for a single node
without fetching their parent revisions.
This commit adds an "haveparents" argument to the "manifestdata"
and "filedata" commands that controls delta generation behavior.
Unless "haveparents" is set, the server assumes that the client
doesn't have parent revisions unless they were previously sent
as part of the current group of revisions.
This change allows the fulltext revision data of any individual
revision to be obtained. This will facilitate shallow clones
and other data retrieval strategies that don't require all previous
revisions of an entity to be fetched.
Differential Revision: https://phab.mercurial-scm.org/D4492
author | Gregory Szorc <gregory.szorc@gmail.com> |
---|---|
date | Thu, 30 Aug 2018 14:55:34 -0700 |
parents | cdccfe20eed7 |
children | 2372284d9457 |
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# Extension dedicated to test patch.diff() upgrade modes from __future__ import absolute_import from mercurial import ( error, patch, pycompat, registrar, scmutil, ) cmdtable = {} command = registrar.command(cmdtable) @command(b'autodiff', [(b'', b'git', b'', b'git upgrade mode (yes/no/auto/warn/abort)')], b'[OPTION]... [FILE]...') def autodiff(ui, repo, *pats, **opts): opts = pycompat.byteskwargs(opts) diffopts = patch.difffeatureopts(ui, opts) git = opts.get(b'git', b'no') brokenfiles = set() losedatafn = None if git in (b'yes', b'no'): diffopts.git = git == b'yes' diffopts.upgrade = False elif git == b'auto': diffopts.git = False diffopts.upgrade = True elif git == b'warn': diffopts.git = False diffopts.upgrade = True def losedatafn(fn=None, **kwargs): brokenfiles.add(fn) return True elif git == b'abort': diffopts.git = False diffopts.upgrade = True def losedatafn(fn=None, **kwargs): raise error.Abort(b'losing data for %s' % fn) else: raise error.Abort(b'--git must be yes, no or auto') ctx1, ctx2 = scmutil.revpair(repo, []) m = scmutil.match(ctx2, pats, opts) it = patch.diff(repo, ctx1.node(), ctx2.node(), match=m, opts=diffopts, losedatafn=losedatafn) for chunk in it: ui.write(chunk) for fn in sorted(brokenfiles): ui.write((b'data lost for: %s\n' % fn))