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

patch: support diff data loss detection and upgrade...

patch: support diff data loss detection and upgrade In worst case, generating diff in upgrade mode can be two times more expensive than generating it in git mode directly: we may have to regenerate the whole diff again whenever a git feature is detected. Also, the first diff attempt is completely buffered instead of being streamed. That said, even without having profiled it yet, I am convinced we can fast-path the upgrade mode if necessary were it to be used in regular diff commands, and not only in mq where avoiding data loss is worth the price.

Patrick Mezard - - Load All Authors

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      # Extension dedicated to test patch.diff() upgrade modes

      #

      #

      from mercurial import cmdutil, patch, util

      def autodiff(ui, repo, *pats, **opts):

          diffopts = patch.diffopts(ui, opts)

          git = opts.get('git', 'no')

          brokenfiles = set()

          losedatafn = None

          if git in ('yes', 'no'):

              diffopts.git = git == 'yes'

              diffopts.upgrade = False

          elif git == 'auto':

              diffopts.git = False

              diffopts.upgrade = True

          elif git == 'warn':

              diffopts.git = False

              diffopts.upgrade = True

              def losedatafn(fn=None, **kwargs):

                  brokenfiles.add(fn)

                  return True

          elif git == 'abort':

              diffopts.git = False

              diffopts.upgrade = True

              def losedatafn(fn=None, **kwargs):

                  raise util.Abort('losing data for %s' % fn)

          else:

              raise util.Abort('--git must be yes, no or auto')

          node1, node2 = cmdutil.revpair(repo, [])

          m = cmdutil.match(repo, pats, opts)

          it = patch.diff(repo, node1, node2, match=m, opts=diffopts,

                          losedatafn=losedatafn)

          for chunk in it:

              ui.write(chunk)

          for fn in sorted(brokenfiles):

              ui.write('data lost for: %s\n' % fn)

      cmdtable = {

          "autodiff":

              (autodiff,

               [('', 'git', '', 'git upgrade mode (yes/no/auto/warn/abort)'),

                ],

               '[OPTION]... [FILE]...'),

      }

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				# Extension dedicated to test patch.diff() upgrade modes
				#
				#
				from mercurial import cmdutil, patch, util

				def autodiff(ui, repo, pats, *opts):
				diffopts = patch.diffopts(ui, opts)
				git = opts.get('git', 'no')
				brokenfiles = set()
				losedatafn = None
				if git in ('yes', 'no'):
				diffopts.git = git == 'yes'
				diffopts.upgrade = False
				elif git == 'auto':
				diffopts.git = False
				diffopts.upgrade = True
				elif git == 'warn':
				diffopts.git = False
				diffopts.upgrade = True
				def losedatafn(fn=None, **kwargs):
				brokenfiles.add(fn)
				return True
				elif git == 'abort':
				diffopts.git = False
				diffopts.upgrade = True
				def losedatafn(fn=None, **kwargs):
				raise util.Abort('losing data for %s' % fn)
				else:
				raise util.Abort('--git must be yes, no or auto')

				node1, node2 = cmdutil.revpair(repo, [])
				m = cmdutil.match(repo, pats, opts)
				it = patch.diff(repo, node1, node2, match=m, opts=diffopts,
				losedatafn=losedatafn)
				for chunk in it:
				ui.write(chunk)
				for fn in sorted(brokenfiles):
				ui.write('data lost for: %s\n' % fn)

				cmdtable = {
				"autodiff":
				(autodiff,
				[('', 'git', '', 'git upgrade mode (yes/no/auto/warn/abort)'),
				],
				'[OPTION]... [FILE]...'),
				}