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Differential D8784

tags: adjust file node cache to have space for 32 bytes node ids
AbandonedPublic

Authored by joerg.sonnenberger on Jul 21 2020, 6:25 PM.

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marmoute

Group Reviewers

hg-reviewers

Summary

The .hgtags processing uses two different caches. The first cache is
essentially a global version of all .hgtags files and a textual format
without hard size requirements. The second cache stores the file node of
the .hgtags file for those changesets that modify it as fixed size
records. Use a new file name for this record and pad the entries to 32
bytes in preparation for replacing SHA1.

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rHG Mercurial

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joerg.sonnenberger created this revision.Jul 21 2020, 6:25 PM

Herald added a reviewer: hg-reviewers. · View Herald TranscriptJul 21 2020, 6:25 PM

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Ping?

this cache is critical for performance of some large installation. silently dropping v1 update and moving to v2 might have very base consequence in case. Should we keep v1 working and only switch for v2 for repository with 32 bites hashes?

I think it is a one time issue per repository, even when mixing old and new clients they will update incrementally?

In D8784#134124, @joerg.sonnenberger wrote:

I think it is a one time issue per repository, even when mixing old and new clients they will update incrementally?

Repository accessed by mixed version will get in troubles and even if "this just get updated" this only happens at the first write. In the mean time read only process touching that repository can get to a crawl for a undefined amount of time.

In D8784#134125, @marmoute wrote:

In D8784#134124, @joerg.sonnenberger wrote:

I think it is a one time issue per repository, even when mixing old and new clients they will update incrementally?

Repository accessed by mixed version will get in troubles and even if "this just get updated" this only happens at the first write. In the mean time read only process touching that repository can get to a crawl for a undefined amount of time.

I agree with @marmoute here as building tag cache is expensive for big repositories. We can always write the new version while keeping code to read the older version too.

(updating status to reflect the current discussion status)

This revision now requires changes to proceed.Sep 11 2020, 4:27 AM

Will be done differently.

Revision Contents
Changeset List

			Path	Packages
M			mercurial/cacheutil.py (2 lines)
M			mercurial/debugcommands.py (2 lines)
M			mercurial/tags.py (21 lines)
M			tests/test-cache-abuse.t (2 lines)
M			tests/test-debugcommands.t (2 lines)
M			tests/test-help.t (2 lines)
M			tests/test-server-view.t (2 lines)
M			tests/test-static-http.t (8 lines)
M			tests/test-tags.t (140 lines)

Commit	Parents	Author	Summary	Date
59b9ec7751f8	84aaf8a191b0	Joerg Sonnenberger		Jul 21 2020, 6:25 PM

Diff 22032

mercurial/cacheutil.py

	"""return the list of cache file valuable to copy during a clone"""			"""return the list of cache file valuable to copy during a clone"""
	# In local clones we're copying all nodes, not just served			# In local clones we're copying all nodes, not just served
	# ones. Therefore copy all branch caches over.			# ones. Therefore copy all branch caches over.
	cachefiles = [b'branch2']			cachefiles = [b'branch2']
	cachefiles += [b'branch2-%s' % f for f in repoview.filtertable]			cachefiles += [b'branch2-%s' % f for f in repoview.filtertable]
	cachefiles += [b'rbc-names-v1', b'rbc-revs-v1']			cachefiles += [b'rbc-names-v1', b'rbc-revs-v1']
	cachefiles += [b'tags2']			cachefiles += [b'tags2']
	cachefiles += [b'tags2-%s' % f for f in repoview.filtertable]			cachefiles += [b'tags2-%s' % f for f in repoview.filtertable]
	cachefiles += [b'hgtagsfnodes1']			cachefiles += [b'hgtagsfnodes2']
	return cachefiles			return cachefiles

mercurial/debugcommands.py

	for node in succsset[1:]:			for node in succsset[1:]:
	ui.write(b' ')			ui.write(b' ')
	ui.write(node2str(node))			ui.write(node2str(node))
	ui.write(b'\n')			ui.write(b'\n')


	@command(b'debugtagscache', [])			@command(b'debugtagscache', [])
	def debugtagscache(ui, repo):			def debugtagscache(ui, repo):
	"""display the contents of .hg/cache/hgtagsfnodes1"""			"""display the contents of .hg/cache/hgtagsfnodes2"""
	cache = tagsmod.hgtagsfnodescache(repo.unfiltered())			cache = tagsmod.hgtagsfnodescache(repo.unfiltered())
	for r in repo:			for r in repo:
	node = repo[r].node()			node = repo[r].node()
	tagsnode = cache.getfnode(node, computemissing=False)			tagsnode = cache.getfnode(node, computemissing=False)
	tagsnodedisplay = hex(tagsnode) if tagsnode else b'missing/invalid'			tagsnodedisplay = hex(tagsnode) if tagsnode else b'missing/invalid'
	ui.write(b'%d %s %s\n' % (r, hex(node), tagsnodedisplay))			ui.write(b'%d %s %s\n' % (r, hex(node), tagsnodedisplay))

mercurial/tags.py

	scmutil,			scmutil,
	util,			util,
	)			)
	from .utils import stringutil			from .utils import stringutil

	# Tags computation can be expensive and caches exist to make it fast in			# Tags computation can be expensive and caches exist to make it fast in
	# the common case.			# the common case.
	#			#
	# The "hgtagsfnodes1" cache file caches the .hgtags filenode values for			# The "hgtagsfnodes2" cache file caches the .hgtags filenode values for
	# each revision in the repository. The file is effectively an array of			# each revision in the repository. The file is effectively an array of
	# fixed length records. Read the docs for "hgtagsfnodescache" for technical			# fixed length records. Read the docs for "hgtagsfnodescache" for technical
	# details.			# details.
	#			#
	# The .hgtags filenode cache grows in proportion to the length of the			# The .hgtags filenode cache grows in proportion to the length of the
	# changelog. The file is truncated when the # changelog is stripped.			# changelog. The file is truncated when the # changelog is stripped.
	#			#
	# The purpose of the filenode cache is to avoid the most expensive part			# The purpose of the filenode cache is to avoid the most expensive part
	# of finding global tags, which is looking up the .hgtags filenode in the			# of finding global tags, which is looking up the .hgtags filenode in the
	# manifest for each head. This can take dozens or over 100ms for			# manifest for each head. This can take dozens or over 100ms for
	# repositories with very large manifests. Multiplied by dozens or even			# repositories with very large manifests. Multiplied by dozens or even
	# hundreds of heads and there is a significant performance concern.			# hundreds of heads and there is a significant performance concern.
	#			#
	# There also exist a separate cache file for each repository filter.			# There also exist a separate cache file for each repository filter.
	# These "tags-*" files store information about the history of tags.			# These "tags-*" files store information about the history of tags.
	#			#
	# The tags cache files consists of a cache validation line followed by			# The tags cache files consists of a cache validation line followed by
	# a history of tags.			# a history of tags.
	#			#
	# The cache validation line has the format:			# The cache validation line has the format:
	#			#
	# <tiprev> <tipnode> [<filteredhash>]			# <tiprev> <tipnode> [<filteredhash>]
	#			#
	# <tiprev> is an integer revision and <tipnode> is a 40 character hex			# <tiprev> is an integer revision and <tipnode> is a 40 or 64 character hex
	# node for that changeset. These redundantly identify the repository			# node for that changeset. These redundantly identify the repository
	# tip from the time the cache was written. In addition, <filteredhash>,			# tip from the time the cache was written. In addition, <filteredhash>,
	# if present, is a 40 character hex hash of the contents of the filtered			# if present, is a 40 or 64 character hex hash of the contents of the filtered
	# revisions for this filter. If the set of filtered revs changes, the			# revisions for this filter. If the set of filtered revs changes, the
	# hash will change and invalidate the cache.			# hash will change and invalidate the cache.
	#			#
	# The history part of the tags cache consists of lines of the form:			# The history part of the tags cache consists of lines of the form:
	#			#
	# <node> <tag>			# <node> <tag>
	#			#
	# (This format is identical to that of .hgtags files.)			# (This format is identical to that of .hgtags files.)
	#			#
	# <tag> is the tag name and <node> is the 40 character hex changeset			# <tag> is the tag name and <node> is the 40 or 64 character hex changeset
	# the tag is associated with.			# the tag is associated with.
	#			#
	# Tags are written sorted by tag name.			# Tags are written sorted by tag name.
	#			#
	# Tags associated with multiple changesets have an entry for each changeset.			# Tags associated with multiple changesets have an entry for each changeset.
	# The most recent changeset (in terms of revlog ordering for the head			# The most recent changeset (in terms of revlog ordering for the head
	# setting it) for each tag is last.			# setting it) for each tag is last.

	)			)

	for name in names:			for name in names:
	repo.hook(b'tag', node=hex(node), tag=name, local=local)			repo.hook(b'tag', node=hex(node), tag=name, local=local)

	return tagnode			return tagnode


	_fnodescachefile = b'hgtagsfnodes1'			_fnodescachefile = b'hgtagsfnodes2'
	_fnodesrecsize = 4 + 20 # changeset fragment + filenode			_fnodesrecsize = 4 + 32 # changeset fragment + filenode
	_fnodesmissingrec = b'\xff' * 24			_fnodesmissingrec = b'\xff' * _fnodesrecsize


	class hgtagsfnodescache(object):			class hgtagsfnodescache(object):
	"""Persistent cache mapping revisions to .hgtags filenodes.			"""Persistent cache mapping revisions to .hgtags filenodes.

	The cache is an array of records. Each item in the array corresponds to			The cache is an array of records. Each item in the array corresponds to
	a changelog revision. Values in the array contain the first 4 bytes of			a changelog revision. Values in the array contain the first 4 bytes of
	the node hash and the 20 bytes .hgtags filenode for that revision.			the node hash and the 20 bytes .hgtags filenode for that revision.
	properprefix = node[0:4]			properprefix = node[0:4]

	# Validate and return existing entry.			# Validate and return existing entry.
	if record != _fnodesmissingrec:			if record != _fnodesmissingrec:
	fileprefix = record[0:4]			fileprefix = record[0:4]

	if fileprefix == properprefix:			if fileprefix == properprefix:
	self.hitcount += 1			self.hitcount += 1
	return record[4:]			return record[4 : len(node) + 4]

	# Fall through.			# Fall through.

	# If we get here, the entry is either missing or invalid.			# If we get here, the entry is either missing or invalid.

	if not computemissing:			if not computemissing:
	return None			return None

	# No .hgtags file on this revision.			# No .hgtags file on this revision.
	fnode = nullid			fnode = nullid

	self._writeentry(offset, properprefix, fnode)			self._writeentry(offset, properprefix, fnode)
	return fnode			return fnode

	def setfnode(self, node, fnode):			def setfnode(self, node, fnode):
	"""Set the .hgtags filenode for a given changeset."""			"""Set the .hgtags filenode for a given changeset."""
	assert len(fnode) == 20			assert len(fnode) in (20, 32)
	ctx = self._repo[node]			ctx = self._repo[node]

	# Do a lookup first to avoid writing if nothing has changed.			# Do a lookup first to avoid writing if nothing has changed.
	if self.getfnode(ctx.node(), computemissing=False) == fnode:			if self.getfnode(ctx.node(), computemissing=False) == fnode:
	return			return

	self._writeentry(ctx.rev() * _fnodesrecsize, node[0:4], fnode)			self._writeentry(ctx.rev() * _fnodesrecsize, node[0:4], fnode)

	def _writeentry(self, offset, prefix, fnode):			def _writeentry(self, offset, prefix, fnode):
	# Slices on array instances only accept other array.			# Slices on array instances only accept other array.
	entry = bytearray(prefix + fnode)			padding = _fnodesrecsize - len(prefix) - len(fnode)
				entry = bytearray(prefix + fnode + b'\x00' * padding)
	self._raw[offset : offset + _fnodesrecsize] = entry			self._raw[offset : offset + _fnodesrecsize] = entry
	# self._dirtyoffset could be None.			# self._dirtyoffset could be None.
	self._dirtyoffset = min(self._dirtyoffset or 0, offset or 0)			self._dirtyoffset = min(self._dirtyoffset or 0, offset or 0)

	def write(self):			def write(self):
	"""Perform all necessary writes to cache file.			"""Perform all necessary writes to cache file.

	This may no-op if no writes are needed or if a write lock could			This may no-op if no writes are needed or if a write lock could

tests/test-cache-abuse.t

	> "$RUNTESTDIR/pdiff" before after \|\| echo "*** missing corruption"			> "$RUNTESTDIR/pdiff" before after \|\| echo "*** missing corruption"
	> test -f $CACHE \|\| echo "not rebuilt"			> test -f $CACHE \|\| echo "not rebuilt"
	> }			> }

	Beat up tags caches:			Beat up tags caches:

	$ damage "tags --hidden" tags2			$ damage "tags --hidden" tags2
	$ damage tags tags2-visible			$ damage tags tags2-visible
	$ damage "tag -f t3" hgtagsfnodes1			$ damage "tag -f t3" hgtagsfnodes2
	1 new orphan changesets			1 new orphan changesets
	1 new orphan changesets			1 new orphan changesets
	1 new orphan changesets			1 new orphan changesets
	1 new orphan changesets			1 new orphan changesets
	1 new orphan changesets			1 new orphan changesets

	Beat up branch caches:			Beat up branch caches:

tests/test-debugcommands.t

	$ rm -rf .hg/cache/			$ rm -rf .hg/cache/
	$ hg debugupdatecaches --debug			$ hg debugupdatecaches --debug
	updating the branch cache			updating the branch cache
	$ ls -r .hg/cache/*			$ ls -r .hg/cache/*
	.hg/cache/tags2-served			.hg/cache/tags2-served
	.hg/cache/tags2			.hg/cache/tags2
	.hg/cache/rbc-revs-v1			.hg/cache/rbc-revs-v1
	.hg/cache/rbc-names-v1			.hg/cache/rbc-names-v1
	.hg/cache/hgtagsfnodes1			.hg/cache/hgtagsfnodes2
	.hg/cache/branch2-visible-hidden			.hg/cache/branch2-visible-hidden
	.hg/cache/branch2-visible			.hg/cache/branch2-visible
	.hg/cache/branch2-served.hidden			.hg/cache/branch2-served.hidden
	.hg/cache/branch2-served			.hg/cache/branch2-served
	.hg/cache/branch2-immutable			.hg/cache/branch2-immutable
	.hg/cache/branch2-base			.hg/cache/branch2-base

	Test debugcolor			Test debugcolor

tests/test-help.t

	manually set the parents of the current working directory			manually set the parents of the current working directory
	debugsidedata			debugsidedata
	dump the side data for a cl/manifest/file revision			dump the side data for a cl/manifest/file revision
	debugssl test a secure connection to a server			debugssl test a secure connection to a server
	debugsub (no help text available)			debugsub (no help text available)
	debugsuccessorssets			debugsuccessorssets
	show set of successors for revision			show set of successors for revision
	debugtagscache			debugtagscache
	display the contents of .hg/cache/hgtagsfnodes1			display the contents of .hg/cache/hgtagsfnodes2
	debugtemplate			debugtemplate
	parse and apply a template			parse and apply a template
	debuguigetpass			debuguigetpass
	show prompt to type password			show prompt to type password
	debuguiprompt			debuguiprompt
	show plain prompt			show plain prompt
	debugupdatecaches			debugupdatecaches
	warm all known caches in the repository			warm all known caches in the repository

tests/test-server-view.t

	$ ls -1 test/.hg/cache/			$ ls -1 test/.hg/cache/
	branch2-base%89c45d2fa07e			branch2-base%89c45d2fa07e
	branch2-immutable%89c45d2fa07e			branch2-immutable%89c45d2fa07e
	branch2-served			branch2-served
	branch2-served%89c45d2fa07e			branch2-served%89c45d2fa07e
	branch2-served.hidden%89c45d2fa07e			branch2-served.hidden%89c45d2fa07e
	branch2-visible%89c45d2fa07e			branch2-visible%89c45d2fa07e
	branch2-visible-hidden%89c45d2fa07e			branch2-visible-hidden%89c45d2fa07e
	hgtagsfnodes1			hgtagsfnodes2
	rbc-names-v1			rbc-names-v1
	rbc-revs-v1			rbc-revs-v1
	tags2			tags2
	tags2-served%89c45d2fa07e			tags2-served%89c45d2fa07e

	cleanup			cleanup

	$ cat errors.log			$ cat errors.log
	$ killdaemons.py			$ killdaemons.py

tests/test-static-http.t


	$ killdaemons.py			$ killdaemons.py

	List of files accessed over HTTP:			List of files accessed over HTTP:

	$ cat server.log \| sed -n -e 's\|.GET $/[^ ]$.*\|\1\|p' \| sort -u			$ cat server.log \| sed -n -e 's\|.GET $/[^ ]$.*\|\1\|p' \| sort -u
	/.hg/bookmarks			/.hg/bookmarks
	/.hg/bookmarks.current			/.hg/bookmarks.current
	/.hg/cache/hgtagsfnodes1			/.hg/cache/hgtagsfnodes2
	/.hg/cache/rbc-names-v1			/.hg/cache/rbc-names-v1
	/.hg/cache/rbc-revs-v1			/.hg/cache/rbc-revs-v1
	/.hg/dirstate			/.hg/dirstate
	/.hg/requires			/.hg/requires
	/.hg/store/00changelog.i			/.hg/store/00changelog.i
	/.hg/store/00manifest.i			/.hg/store/00manifest.i
	/.hg/store/data/%7E2ehgsub.i (no-py37 !)			/.hg/store/data/%7E2ehgsub.i (no-py37 !)
	/.hg/store/data/%7E2ehgsubstate.i (no-py37 !)			/.hg/store/data/%7E2ehgsubstate.i (no-py37 !)
	/.hg/store/data/a.i			/.hg/store/data/a.i
	/.hg/store/data/~2ehgsub.i (py37 !)			/.hg/store/data/~2ehgsub.i (py37 !)
	/.hg/store/data/~2ehgsubstate.i (py37 !)			/.hg/store/data/~2ehgsubstate.i (py37 !)
	/notarepo/.hg/00changelog.i			/notarepo/.hg/00changelog.i
	/notarepo/.hg/requires			/notarepo/.hg/requires
	/remote-with-names/.hg/bookmarks			/remote-with-names/.hg/bookmarks
	/remote-with-names/.hg/bookmarks.current			/remote-with-names/.hg/bookmarks.current
	/remote-with-names/.hg/cache/branch2-served			/remote-with-names/.hg/cache/branch2-served
	/remote-with-names/.hg/cache/hgtagsfnodes1			/remote-with-names/.hg/cache/hgtagsfnodes2
	/remote-with-names/.hg/cache/rbc-names-v1			/remote-with-names/.hg/cache/rbc-names-v1
	/remote-with-names/.hg/cache/rbc-revs-v1			/remote-with-names/.hg/cache/rbc-revs-v1
	/remote-with-names/.hg/cache/tags2-served			/remote-with-names/.hg/cache/tags2-served
	/remote-with-names/.hg/dirstate			/remote-with-names/.hg/dirstate
	/remote-with-names/.hg/localtags			/remote-with-names/.hg/localtags
	/remote-with-names/.hg/requires			/remote-with-names/.hg/requires
	/remote-with-names/.hg/store/00changelog.i			/remote-with-names/.hg/store/00changelog.i
	/remote-with-names/.hg/store/00manifest.i			/remote-with-names/.hg/store/00manifest.i
	/remote-with-names/.hg/store/data/%7E2ehgtags.i (no-py37 !)			/remote-with-names/.hg/store/data/%7E2ehgtags.i (no-py37 !)
	/remote-with-names/.hg/store/data/foo.i			/remote-with-names/.hg/store/data/foo.i
	/remote-with-names/.hg/store/data/~2ehgtags.i (py37 !)			/remote-with-names/.hg/store/data/~2ehgtags.i (py37 !)
	/remote/.hg/bookmarks			/remote/.hg/bookmarks
	/remote/.hg/bookmarks.current			/remote/.hg/bookmarks.current
	/remote/.hg/cache/branch2-base			/remote/.hg/cache/branch2-base
	/remote/.hg/cache/branch2-immutable			/remote/.hg/cache/branch2-immutable
	/remote/.hg/cache/branch2-served			/remote/.hg/cache/branch2-served
	/remote/.hg/cache/hgtagsfnodes1			/remote/.hg/cache/hgtagsfnodes2
	/remote/.hg/cache/rbc-names-v1			/remote/.hg/cache/rbc-names-v1
	/remote/.hg/cache/rbc-revs-v1			/remote/.hg/cache/rbc-revs-v1
	/remote/.hg/cache/tags2-served			/remote/.hg/cache/tags2-served
	/remote/.hg/dirstate			/remote/.hg/dirstate
	/remote/.hg/localtags			/remote/.hg/localtags
	/remote/.hg/requires			/remote/.hg/requires
	/remote/.hg/store/00changelog.i			/remote/.hg/store/00changelog.i
	/remote/.hg/store/00manifest.i			/remote/.hg/store/00manifest.i
	/remote/.hg/store/data/%7E2edotfile%20with%20spaces.i (no-py37 !)			/remote/.hg/store/data/%7E2edotfile%20with%20spaces.i (no-py37 !)
	/remote/.hg/store/data/%7E2ehgtags.i (no-py37 !)			/remote/.hg/store/data/%7E2ehgtags.i (no-py37 !)
	/remote/.hg/store/data/bar.i			/remote/.hg/store/data/bar.i
	/remote/.hg/store/data/quux.i			/remote/.hg/store/data/quux.i
	/remote/.hg/store/data/~2edotfile%20with%20spaces.i (py37 !)			/remote/.hg/store/data/~2edotfile%20with%20spaces.i (py37 !)
	/remote/.hg/store/data/~2ehgtags.i (py37 !)			/remote/.hg/store/data/~2ehgtags.i (py37 !)
	/remotempty/.hg/bookmarks			/remotempty/.hg/bookmarks
	/remotempty/.hg/bookmarks.current			/remotempty/.hg/bookmarks.current
	/remotempty/.hg/dirstate			/remotempty/.hg/dirstate
	/remotempty/.hg/requires			/remotempty/.hg/requires
	/remotempty/.hg/store/00changelog.i			/remotempty/.hg/store/00changelog.i
	/remotempty/.hg/store/00manifest.i			/remotempty/.hg/store/00manifest.i
	/sub/.hg/bookmarks			/sub/.hg/bookmarks
	/sub/.hg/bookmarks.current			/sub/.hg/bookmarks.current
	/sub/.hg/cache/hgtagsfnodes1			/sub/.hg/cache/hgtagsfnodes2
	/sub/.hg/cache/rbc-names-v1			/sub/.hg/cache/rbc-names-v1
	/sub/.hg/cache/rbc-revs-v1			/sub/.hg/cache/rbc-revs-v1
	/sub/.hg/dirstate			/sub/.hg/dirstate
	/sub/.hg/requires			/sub/.hg/requires
	/sub/.hg/store/00changelog.i			/sub/.hg/store/00changelog.i
	/sub/.hg/store/00manifest.i			/sub/.hg/store/00manifest.i
	/sub/.hg/store/data/%7E2ehgtags.i (no-py37 !)			/sub/.hg/store/data/%7E2ehgtags.i (no-py37 !)
	/sub/.hg/store/data/test.i			/sub/.hg/store/data/test.i
	/sub/.hg/store/data/~2ehgtags.i (py37 !)			/sub/.hg/store/data/~2ehgtags.i (py37 !)

tests/test-tags.t


	Helper functions:			Helper functions:

	$ cacheexists() {			$ cacheexists() {
	> [ -f .hg/cache/tags2-visible ] && echo "tag cache exists" \|\| echo "no tag cache"			> [ -f .hg/cache/tags2-visible ] && echo "tag cache exists" \|\| echo "no tag cache"
	> }			> }

	$ fnodescacheexists() {			$ fnodescacheexists() {
	> [ -f .hg/cache/hgtagsfnodes1 ] && echo "fnodes cache exists" \|\| echo "no fnodes cache"			> [ -f .hg/cache/hgtagsfnodes2 ] && echo "fnodes cache exists" \|\| echo "no fnodes cache"
	> }			> }

	$ dumptags() {			$ dumptags() {
	> rev=$1			> rev=$1
	> echo "rev $rev: .hgtags:"			> echo "rev $rev: .hgtags:"
	> hg cat -r$rev .hgtags			> hg cat -r$rev .hgtags
	> }			> }

	b9154636be93 tip			b9154636be93 tip

	We should have a fnodes cache now that we have a real tag			We should have a fnodes cache now that we have a real tag
	The cache should have an empty entry for rev 0 and a valid entry for rev 1.			The cache should have an empty entry for rev 0 and a valid entry for rev 1.


	$ fnodescacheexists			$ fnodescacheexists
	fnodes cache exists			fnodes cache exists
	$ f --size --hexdump .hg/cache/hgtagsfnodes1			$ f --size --hexdump .hg/cache/hgtagsfnodes2
	.hg/cache/hgtagsfnodes1: size=48			.hg/cache/hgtagsfnodes2: size=72
	0000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff \|................\|			0000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff \|................\|
	0010: ff ff ff ff ff ff ff ff b9 15 46 36 26 b7 b4 a7 \|..........F6&...\|			0010: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff \|................\|
	0020: 73 e0 9e e3 c5 2f 51 0e 19 e0 5e 1f f9 66 d8 59 \|s..../Q...^..f.Y\|			0020: ff ff ff ff b9 15 46 36 26 b7 b4 a7 73 e0 9e e3 \|......F6&...s...\|
				0030: c5 2f 51 0e 19 e0 5e 1f f9 66 d8 59 00 00 00 00 \|./Q...^..f.Y....\|
				0040: 00 00 00 00 00 00 00 00 \|........\|
	$ hg debugtagscache			$ hg debugtagscache
	0 acb14030fe0a21b60322c440ad2d20cf7685a376 missing/invalid			0 acb14030fe0a21b60322c440ad2d20cf7685a376 missing/invalid
	1 b9154636be938d3d431e75a7c906504a079bfe07 26b7b4a773e09ee3c52f510e19e05e1ff966d859			1 b9154636be938d3d431e75a7c906504a079bfe07 26b7b4a773e09ee3c52f510e19e05e1ff966d859

	Repeat with cold tag cache:			Repeat with cold tag cache:

	$ rm -f .hg/cache/tags2-visible .hg/cache/hgtagsfnodes1			$ rm -f .hg/cache/tags2-visible .hg/cache/hgtagsfnodes2
	$ hg identify			$ hg identify
	b9154636be93 tip			b9154636be93 tip

	$ fnodescacheexists			$ fnodescacheexists
	fnodes cache exists			fnodes cache exists
	$ f --size --hexdump .hg/cache/hgtagsfnodes1			$ f --size --hexdump .hg/cache/hgtagsfnodes2
	.hg/cache/hgtagsfnodes1: size=48			.hg/cache/hgtagsfnodes2: size=72
	0000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff \|................\|			0000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff \|................\|
	0010: ff ff ff ff ff ff ff ff b9 15 46 36 26 b7 b4 a7 \|..........F6&...\|			0010: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff \|................\|
	0020: 73 e0 9e e3 c5 2f 51 0e 19 e0 5e 1f f9 66 d8 59 \|s..../Q...^..f.Y\|			0020: ff ff ff ff b9 15 46 36 26 b7 b4 a7 73 e0 9e e3 \|......F6&...s...\|
				0030: c5 2f 51 0e 19 e0 5e 1f f9 66 d8 59 00 00 00 00 \|./Q...^..f.Y....\|
				0040: 00 00 00 00 00 00 00 00 \|........\|

	And again, but now unable to write tag cache or lock file:			And again, but now unable to write tag cache or lock file:

	#if unix-permissions no-fsmonitor			#if unix-permissions no-fsmonitor

	$ rm -f .hg/cache/tags2-visible .hg/cache/hgtagsfnodes1			$ rm -f .hg/cache/tags2-visible .hg/cache/hgtagsfnodes2
	$ chmod 555 .hg/cache			$ chmod 555 .hg/cache
	$ hg identify			$ hg identify
	b9154636be93 tip			b9154636be93 tip
	$ chmod 755 .hg/cache			$ chmod 755 .hg/cache

	(this block should be protected by no-fsmonitor, because "chmod 555 .hg"			(this block should be protected by no-fsmonitor, because "chmod 555 .hg"
	makes watchman fail at accessing to files under .hg)			makes watchman fail at accessing to files under .hg)

	$ chmod 555 .hg			$ chmod 555 .hg
	$ hg identify			$ hg identify
	b9154636be93 tip			b9154636be93 tip
	$ chmod 755 .hg			$ chmod 755 .hg
	#endif			#endif

	Tag cache debug info written to blackbox log			Tag cache debug info written to blackbox log

	$ rm -f .hg/cache/tags2-visible .hg/cache/hgtagsfnodes1			$ rm -f .hg/cache/tags2-visible .hg/cache/hgtagsfnodes2
	$ hg identify			$ hg identify
	b9154636be93 tip			b9154636be93 tip
	$ hg blackbox -l 6			$ hg blackbox -l 6
	1970/01/01 00:00:00 bob @b9154636be938d3d431e75a7c906504a079bfe07 (5000)> identify			1970/01/01 00:00:00 bob @b9154636be938d3d431e75a7c906504a079bfe07 (5000)> identify
	1970/01/01 00:00:00 bob @b9154636be938d3d431e75a7c906504a079bfe07 (5000)> writing 48 bytes to cache/hgtagsfnodes1			1970/01/01 00:00:00 bob @b9154636be938d3d431e75a7c906504a079bfe07 (5000)> writing 72 bytes to cache/hgtagsfnodes2
	1970/01/01 00:00:00 bob @b9154636be938d3d431e75a7c906504a079bfe07 (5000)> 0/2 cache hits/lookups in * seconds (glob)			1970/01/01 00:00:00 bob @b9154636be938d3d431e75a7c906504a079bfe07 (5000)> 0/2 cache hits/lookups in * seconds (glob)
	1970/01/01 00:00:00 bob @b9154636be938d3d431e75a7c906504a079bfe07 (5000)> writing .hg/cache/tags2-visible with 1 tags			1970/01/01 00:00:00 bob @b9154636be938d3d431e75a7c906504a079bfe07 (5000)> writing .hg/cache/tags2-visible with 1 tags
	1970/01/01 00:00:00 bob @b9154636be938d3d431e75a7c906504a079bfe07 (5000)> identify exited 0 after * seconds (glob)			1970/01/01 00:00:00 bob @b9154636be938d3d431e75a7c906504a079bfe07 (5000)> identify exited 0 after * seconds (glob)
	1970/01/01 00:00:00 bob @b9154636be938d3d431e75a7c906504a079bfe07 (5000)> blackbox -l 6			1970/01/01 00:00:00 bob @b9154636be938d3d431e75a7c906504a079bfe07 (5000)> blackbox -l 6

	Failure to acquire lock results in no write			Failure to acquire lock results in no write

	$ rm -f .hg/cache/tags2-visible .hg/cache/hgtagsfnodes1			$ rm -f .hg/cache/tags2-visible .hg/cache/hgtagsfnodes2
	$ echo 'foo:1' > .hg/wlock			$ echo 'foo:1' > .hg/wlock
	$ hg identify			$ hg identify
	b9154636be93 tip			b9154636be93 tip
	$ hg blackbox -l 6			$ hg blackbox -l 6
	1970/01/01 00:00:00 bob @b9154636be938d3d431e75a7c906504a079bfe07 (5000)> identify			1970/01/01 00:00:00 bob @b9154636be938d3d431e75a7c906504a079bfe07 (5000)> identify
	1970/01/01 00:00:00 bob @b9154636be938d3d431e75a7c906504a079bfe07 (5000)> not writing .hg/cache/hgtagsfnodes1 because lock cannot be acquired			1970/01/01 00:00:00 bob @b9154636be938d3d431e75a7c906504a079bfe07 (5000)> not writing .hg/cache/hgtagsfnodes2 because lock cannot be acquired
	1970/01/01 00:00:00 bob @b9154636be938d3d431e75a7c906504a079bfe07 (5000)> 0/2 cache hits/lookups in * seconds (glob)			1970/01/01 00:00:00 bob @b9154636be938d3d431e75a7c906504a079bfe07 (5000)> 0/2 cache hits/lookups in * seconds (glob)
	1970/01/01 00:00:00 bob @b9154636be938d3d431e75a7c906504a079bfe07 (5000)> writing .hg/cache/tags2-visible with 1 tags			1970/01/01 00:00:00 bob @b9154636be938d3d431e75a7c906504a079bfe07 (5000)> writing .hg/cache/tags2-visible with 1 tags
	1970/01/01 00:00:00 bob @b9154636be938d3d431e75a7c906504a079bfe07 (5000)> identify exited 0 after * seconds (glob)			1970/01/01 00:00:00 bob @b9154636be938d3d431e75a7c906504a079bfe07 (5000)> identify exited 0 after * seconds (glob)
	1970/01/01 00:00:00 bob @b9154636be938d3d431e75a7c906504a079bfe07 (5000)> blackbox -l 6			1970/01/01 00:00:00 bob @b9154636be938d3d431e75a7c906504a079bfe07 (5000)> blackbox -l 6

	$ fnodescacheexists			$ fnodescacheexists
	no fnodes cache			no fnodes cache

	$ rm .hg/wlock			$ rm .hg/wlock

	$ rm -f .hg/cache/tags2-visible .hg/cache/hgtagsfnodes1			$ rm -f .hg/cache/tags2-visible .hg/cache/hgtagsfnodes2
	$ hg identify			$ hg identify
	b9154636be93 tip			b9154636be93 tip

	Create a branch:			Create a branch:

	$ echo bb > a			$ echo bb > a
	$ hg status			$ hg status
	M a			M a
	$ echo 1 > b			$ echo 1 > b
	$ hg add b			$ hg add b
	$ hg commit -m "branch"			$ hg commit -m "branch"
	created new head			created new head

	Creating a new commit shouldn't append the .hgtags fnodes cache until			Creating a new commit shouldn't append the .hgtags fnodes cache until
	tags info is accessed			tags info is accessed

	$ f --size --hexdump .hg/cache/hgtagsfnodes1			$ f --size --hexdump .hg/cache/hgtagsfnodes2
	.hg/cache/hgtagsfnodes1: size=48			.hg/cache/hgtagsfnodes2: size=72
	0000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff \|................\|			0000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff \|................\|
	0010: ff ff ff ff ff ff ff ff b9 15 46 36 26 b7 b4 a7 \|..........F6&...\|			0010: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff \|................\|
	0020: 73 e0 9e e3 c5 2f 51 0e 19 e0 5e 1f f9 66 d8 59 \|s..../Q...^..f.Y\|			0020: ff ff ff ff b9 15 46 36 26 b7 b4 a7 73 e0 9e e3 \|......F6&...s...\|
				0030: c5 2f 51 0e 19 e0 5e 1f f9 66 d8 59 00 00 00 00 \|./Q...^..f.Y....\|
				0040: 00 00 00 00 00 00 00 00 \|........\|

	$ hg id			$ hg id
	c8edf04160c7 tip			c8edf04160c7 tip

	First 4 bytes of record 3 are changeset fragment			First 4 bytes of record 3 are changeset fragment

	$ f --size --hexdump .hg/cache/hgtagsfnodes1			$ f --size --hexdump .hg/cache/hgtagsfnodes2
	.hg/cache/hgtagsfnodes1: size=72			.hg/cache/hgtagsfnodes2: size=108
	0000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff \|................\|			0000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff \|................\|
	0010: ff ff ff ff ff ff ff ff b9 15 46 36 26 b7 b4 a7 \|..........F6&...\|			0010: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff \|................\|
	0020: 73 e0 9e e3 c5 2f 51 0e 19 e0 5e 1f f9 66 d8 59 \|s..../Q...^..f.Y\|			0020: ff ff ff ff b9 15 46 36 26 b7 b4 a7 73 e0 9e e3 \|......F6&...s...\|
	0030: c8 ed f0 41 00 00 00 00 00 00 00 00 00 00 00 00 \|...A............\|			0030: c5 2f 51 0e 19 e0 5e 1f f9 66 d8 59 00 00 00 00 \|./Q...^..f.Y....\|
	0040: 00 00 00 00 00 00 00 00 \|........\|			0040: 00 00 00 00 00 00 00 00 c8 ed f0 41 00 00 00 00 \|...........A....\|
				0050: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 \|................\|
				0060: 00 00 00 00 00 00 00 00 00 00 00 00 \|............\|

	Merge the two heads:			Merge the two heads:

	$ hg merge 1			$ hg merge 1
	1 files updated, 0 files merged, 0 files removed, 0 files unresolved			1 files updated, 0 files merged, 0 files removed, 0 files unresolved
	(branch merge, don't forget to commit)			(branch merge, don't forget to commit)
	$ hg blackbox -l3			$ hg blackbox -l3
	1970/01/01 00:00:00 bob @c8edf04160c7f731e4589d66ab3ab3486a64ac28 (5000)> merge 1			1970/01/01 00:00:00 bob @c8edf04160c7f731e4589d66ab3ab3486a64ac28 (5000)> merge 1
	Dump cache:			Dump cache:

	$ cat .hg/cache/tags2-visible			$ cat .hg/cache/tags2-visible
	4 0c192d7d5e6b78a714de54a2e9627952a877e25a			4 0c192d7d5e6b78a714de54a2e9627952a877e25a
	bbd179dfa0a71671c253b3ae0aa1513b60d199fa bar			bbd179dfa0a71671c253b3ae0aa1513b60d199fa bar
	bbd179dfa0a71671c253b3ae0aa1513b60d199fa bar			bbd179dfa0a71671c253b3ae0aa1513b60d199fa bar
	78391a272241d70354aa14c874552cad6b51bb42 bar			78391a272241d70354aa14c874552cad6b51bb42 bar

	$ f --size --hexdump .hg/cache/hgtagsfnodes1			$ f --size --hexdump .hg/cache/hgtagsfnodes2
	.hg/cache/hgtagsfnodes1: size=120			.hg/cache/hgtagsfnodes2: size=180
	0000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff \|................\|			0000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff \|................\|
	0010: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff \|................\|			0010: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff \|................\|
	0020: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff \|................\|			0020: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff \|................\|
	0030: 7a 94 12 77 0c 04 f2 a8 af 31 de 17 fa b7 42 28 \|z..w.....1....B(\|			0030: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff \|................\|
	0040: 78 ee 5a 2d ad bc 94 3d 6f a4 50 21 7d 3b 71 8c \|x.Z-...=o.P!};q.\|			0040: ff ff ff ff ff ff ff ff 7a 94 12 77 0c 04 f2 a8 \|........z..w....\|
	0050: 96 4e f3 7b 89 e5 50 eb da fd 57 89 e7 6c e1 b0 \|.N.{..P...W..l..\|			0050: af 31 de 17 fa b7 42 28 78 ee 5a 2d ad bc 94 3d \|.1....B(x.Z-...=\|
	0060: 0c 19 2d 7d 0c 04 f2 a8 af 31 de 17 fa b7 42 28 \|..-}.....1....B(\|			0060: 00 00 00 00 00 00 00 00 00 00 00 00 6f a4 50 21 \|............o.P!\|
	0070: 78 ee 5a 2d ad bc 94 3d \|x.Z-...=\|			0070: 7d 3b 71 8c 96 4e f3 7b 89 e5 50 eb da fd 57 89 \|};q..N.{..P...W.\|
				0080: e7 6c e1 b0 00 00 00 00 00 00 00 00 00 00 00 00 \|.l..............\|
				0090: 0c 19 2d 7d 0c 04 f2 a8 af 31 de 17 fa b7 42 28 \|..-}.....1....B(\|
				00a0: 78 ee 5a 2d ad bc 94 3d 00 00 00 00 00 00 00 00 \|x.Z-...=........\|
				00b0: 00 00 00 00 \|....\|

	Corrupt the .hgtags fnodes cache			Corrupt the .hgtags fnodes cache
	Extra junk data at the end should get overwritten on next cache update			Extra junk data at the end should get overwritten on next cache update

	$ echo extra >> .hg/cache/hgtagsfnodes1			$ echo extra >> .hg/cache/hgtagsfnodes2
	$ echo dummy1 > foo			$ echo dummy1 > foo
	$ hg commit -m throwaway1			$ hg commit -m throwaway1

	$ hg tags			$ hg tags
	tip 5:8dbfe60eff30			tip 5:8dbfe60eff30
	bar 1:78391a272241			bar 1:78391a272241

	$ hg blackbox -l 6			$ hg blackbox -l 6
	1970/01/01 00:00:00 bob @8dbfe60eff306a54259cfe007db9e330e7ecf866 (5000)> tags			1970/01/01 00:00:00 bob @8dbfe60eff306a54259cfe007db9e330e7ecf866 (5000)> tags
	1970/01/01 00:00:00 bob @8dbfe60eff306a54259cfe007db9e330e7ecf866 (5000)> writing 24 bytes to cache/hgtagsfnodes1			1970/01/01 00:00:00 bob @8dbfe60eff306a54259cfe007db9e330e7ecf866 (5000)> writing 36 bytes to cache/hgtagsfnodes2
	1970/01/01 00:00:00 bob @8dbfe60eff306a54259cfe007db9e330e7ecf866 (5000)> 3/4 cache hits/lookups in * seconds (glob)			1970/01/01 00:00:00 bob @8dbfe60eff306a54259cfe007db9e330e7ecf866 (5000)> 3/4 cache hits/lookups in * seconds (glob)
	1970/01/01 00:00:00 bob @8dbfe60eff306a54259cfe007db9e330e7ecf866 (5000)> writing .hg/cache/tags2-visible with 1 tags			1970/01/01 00:00:00 bob @8dbfe60eff306a54259cfe007db9e330e7ecf866 (5000)> writing .hg/cache/tags2-visible with 1 tags
	1970/01/01 00:00:00 bob @8dbfe60eff306a54259cfe007db9e330e7ecf866 (5000)> tags exited 0 after * seconds (glob)			1970/01/01 00:00:00 bob @8dbfe60eff306a54259cfe007db9e330e7ecf866 (5000)> tags exited 0 after * seconds (glob)
	1970/01/01 00:00:00 bob @8dbfe60eff306a54259cfe007db9e330e7ecf866 (5000)> blackbox -l 6			1970/01/01 00:00:00 bob @8dbfe60eff306a54259cfe007db9e330e7ecf866 (5000)> blackbox -l 6

	On junk data + missing cache entries, hg also overwrites the junk.			On junk data + missing cache entries, hg also overwrites the junk.

	$ rm -f .hg/cache/tags2-visible			$ rm -f .hg/cache/tags2-visible
	>>> import os			>>> import os
	>>> with open(".hg/cache/hgtagsfnodes1", "ab+") as fp:			>>> with open(".hg/cache/hgtagsfnodes2", "ab+") as fp:
	... fp.seek(-10, os.SEEK_END) and None			... fp.seek(-10, os.SEEK_END) and None
	... fp.truncate() and None			... fp.truncate() and None

	$ hg debugtagscache \| tail -2			$ hg debugtagscache \| tail -2
	4 0c192d7d5e6b78a714de54a2e9627952a877e25a 0c04f2a8af31de17fab7422878ee5a2dadbc943d			4 0c192d7d5e6b78a714de54a2e9627952a877e25a 0c04f2a8af31de17fab7422878ee5a2dadbc943d
	5 8dbfe60eff306a54259cfe007db9e330e7ecf866 missing/invalid			5 8dbfe60eff306a54259cfe007db9e330e7ecf866 missing/invalid
	$ hg tags			$ hg tags
	tip 5:8dbfe60eff30			tip 5:8dbfe60eff30
	bar 1:78391a272241			bar 1:78391a272241
	$ hg debugtagscache \| tail -2			$ hg debugtagscache \| tail -2
	4 0c192d7d5e6b78a714de54a2e9627952a877e25a 0c04f2a8af31de17fab7422878ee5a2dadbc943d			4 0c192d7d5e6b78a714de54a2e9627952a877e25a 0c04f2a8af31de17fab7422878ee5a2dadbc943d
	5 8dbfe60eff306a54259cfe007db9e330e7ecf866 0c04f2a8af31de17fab7422878ee5a2dadbc943d			5 8dbfe60eff306a54259cfe007db9e330e7ecf866 0c04f2a8af31de17fab7422878ee5a2dadbc943d

	#if unix-permissions no-root			#if unix-permissions no-root
	Errors writing to .hgtags fnodes cache are silently ignored			Errors writing to .hgtags fnodes cache are silently ignored

	$ echo dummy2 > foo			$ echo dummy2 > foo
	$ hg commit -m throwaway2			$ hg commit -m throwaway2

	$ chmod a-w .hg/cache/hgtagsfnodes1			$ chmod a-w .hg/cache/hgtagsfnodes2
	$ rm -f .hg/cache/tags2-visible			$ rm -f .hg/cache/tags2-visible

	$ hg tags			$ hg tags
	tip 6:b968051b5cf3			tip 6:b968051b5cf3
	bar 1:78391a272241			bar 1:78391a272241

	$ hg blackbox -l 6			$ hg blackbox -l 6
	1970/01/01 00:00:00 bob @b968051b5cf3f624b771779c6d5f84f1d4c3fb5d (5000)> tags			1970/01/01 00:00:00 bob @b968051b5cf3f624b771779c6d5f84f1d4c3fb5d (5000)> tags
	1970/01/01 00:00:00 bob @b968051b5cf3f624b771779c6d5f84f1d4c3fb5d (5000)> couldn't write cache/hgtagsfnodes1: [Errno ] (glob)			1970/01/01 00:00:00 bob @b968051b5cf3f624b771779c6d5f84f1d4c3fb5d (5000)> couldn't write cache/hgtagsfnodes2: [Errno ] (glob)
	1970/01/01 00:00:00 bob @b968051b5cf3f624b771779c6d5f84f1d4c3fb5d (5000)> 3/4 cache hits/lookups in * seconds (glob)			1970/01/01 00:00:00 bob @b968051b5cf3f624b771779c6d5f84f1d4c3fb5d (5000)> 3/4 cache hits/lookups in * seconds (glob)
	1970/01/01 00:00:00 bob @b968051b5cf3f624b771779c6d5f84f1d4c3fb5d (5000)> writing .hg/cache/tags2-visible with 1 tags			1970/01/01 00:00:00 bob @b968051b5cf3f624b771779c6d5f84f1d4c3fb5d (5000)> writing .hg/cache/tags2-visible with 1 tags
	1970/01/01 00:00:00 bob @b968051b5cf3f624b771779c6d5f84f1d4c3fb5d (5000)> tags exited 0 after * seconds (glob)			1970/01/01 00:00:00 bob @b968051b5cf3f624b771779c6d5f84f1d4c3fb5d (5000)> tags exited 0 after * seconds (glob)
	1970/01/01 00:00:00 bob @b968051b5cf3f624b771779c6d5f84f1d4c3fb5d (5000)> blackbox -l 6			1970/01/01 00:00:00 bob @b968051b5cf3f624b771779c6d5f84f1d4c3fb5d (5000)> blackbox -l 6

	$ chmod a+w .hg/cache/hgtagsfnodes1			$ chmod a+w .hg/cache/hgtagsfnodes2

	$ rm -f .hg/cache/tags2-visible			$ rm -f .hg/cache/tags2-visible
	$ hg tags			$ hg tags
	tip 6:b968051b5cf3			tip 6:b968051b5cf3
	bar 1:78391a272241			bar 1:78391a272241

	$ hg blackbox -l 6			$ hg blackbox -l 6
	1970/01/01 00:00:00 bob @b968051b5cf3f624b771779c6d5f84f1d4c3fb5d (5000)> tags			1970/01/01 00:00:00 bob @b968051b5cf3f624b771779c6d5f84f1d4c3fb5d (5000)> tags
	1970/01/01 00:00:00 bob @b968051b5cf3f624b771779c6d5f84f1d4c3fb5d (5000)> writing 24 bytes to cache/hgtagsfnodes1			1970/01/01 00:00:00 bob @b968051b5cf3f624b771779c6d5f84f1d4c3fb5d (5000)> writing 36 bytes to cache/hgtagsfnodes2
	1970/01/01 00:00:00 bob @b968051b5cf3f624b771779c6d5f84f1d4c3fb5d (5000)> 3/4 cache hits/lookups in * seconds (glob)			1970/01/01 00:00:00 bob @b968051b5cf3f624b771779c6d5f84f1d4c3fb5d (5000)> 3/4 cache hits/lookups in * seconds (glob)
	1970/01/01 00:00:00 bob @b968051b5cf3f624b771779c6d5f84f1d4c3fb5d (5000)> writing .hg/cache/tags2-visible with 1 tags			1970/01/01 00:00:00 bob @b968051b5cf3f624b771779c6d5f84f1d4c3fb5d (5000)> writing .hg/cache/tags2-visible with 1 tags
	1970/01/01 00:00:00 bob @b968051b5cf3f624b771779c6d5f84f1d4c3fb5d (5000)> tags exited 0 after * seconds (glob)			1970/01/01 00:00:00 bob @b968051b5cf3f624b771779c6d5f84f1d4c3fb5d (5000)> tags exited 0 after * seconds (glob)
	1970/01/01 00:00:00 bob @b968051b5cf3f624b771779c6d5f84f1d4c3fb5d (5000)> blackbox -l 6			1970/01/01 00:00:00 bob @b968051b5cf3f624b771779c6d5f84f1d4c3fb5d (5000)> blackbox -l 6

	$ f --size .hg/cache/hgtagsfnodes1			$ f --size .hg/cache/hgtagsfnodes2
	.hg/cache/hgtagsfnodes1: size=168			.hg/cache/hgtagsfnodes2: size=252

	$ hg -q --config extensions.strip= strip -r 6 --no-backup			$ hg -q --config extensions.strip= strip -r 6 --no-backup
	#endif			#endif

	Stripping doesn't truncate the tags cache until new data is available			Stripping doesn't truncate the tags cache until new data is available

	$ rm -f .hg/cache/hgtagsfnodes1 .hg/cache/tags2-visible			$ rm -f .hg/cache/hgtagsfnodes2 .hg/cache/tags2-visible
	$ hg tags			$ hg tags
	tip 5:8dbfe60eff30			tip 5:8dbfe60eff30
	bar 1:78391a272241			bar 1:78391a272241

	$ f --size .hg/cache/hgtagsfnodes1			$ f --size .hg/cache/hgtagsfnodes2
	.hg/cache/hgtagsfnodes1: size=144			.hg/cache/hgtagsfnodes2: size=216

	$ hg -q --config extensions.strip= strip -r 5 --no-backup			$ hg -q --config extensions.strip= strip -r 5 --no-backup
	$ hg tags			$ hg tags
	tip 4:0c192d7d5e6b			tip 4:0c192d7d5e6b
	bar 1:78391a272241			bar 1:78391a272241

	$ hg blackbox -l 5			$ hg blackbox -l 5
	1970/01/01 00:00:00 bob @0c192d7d5e6b78a714de54a2e9627952a877e25a (5000)> writing 24 bytes to cache/hgtagsfnodes1			1970/01/01 00:00:00 bob @0c192d7d5e6b78a714de54a2e9627952a877e25a (5000)> writing 36 bytes to cache/hgtagsfnodes2
	1970/01/01 00:00:00 bob @0c192d7d5e6b78a714de54a2e9627952a877e25a (5000)> 2/4 cache hits/lookups in * seconds (glob)			1970/01/01 00:00:00 bob @0c192d7d5e6b78a714de54a2e9627952a877e25a (5000)> 2/4 cache hits/lookups in * seconds (glob)
	1970/01/01 00:00:00 bob @0c192d7d5e6b78a714de54a2e9627952a877e25a (5000)> writing .hg/cache/tags2-visible with 1 tags			1970/01/01 00:00:00 bob @0c192d7d5e6b78a714de54a2e9627952a877e25a (5000)> writing .hg/cache/tags2-visible with 1 tags
	1970/01/01 00:00:00 bob @0c192d7d5e6b78a714de54a2e9627952a877e25a (5000)> tags exited 0 after * seconds (glob)			1970/01/01 00:00:00 bob @0c192d7d5e6b78a714de54a2e9627952a877e25a (5000)> tags exited 0 after * seconds (glob)
	1970/01/01 00:00:00 bob @0c192d7d5e6b78a714de54a2e9627952a877e25a (5000)> blackbox -l 5			1970/01/01 00:00:00 bob @0c192d7d5e6b78a714de54a2e9627952a877e25a (5000)> blackbox -l 5

	$ f --size .hg/cache/hgtagsfnodes1			$ f --size .hg/cache/hgtagsfnodes2
	.hg/cache/hgtagsfnodes1: size=120			.hg/cache/hgtagsfnodes2: size=180

	$ echo dummy > foo			$ echo dummy > foo
	$ hg commit -m throwaway3			$ hg commit -m throwaway3

	$ hg tags			$ hg tags
	tip 5:035f65efb448			tip 5:035f65efb448
	bar 1:78391a272241			bar 1:78391a272241

	$ hg blackbox -l 6			$ hg blackbox -l 6
	1970/01/01 00:00:00 bob @035f65efb448350f4772141702a81ab1df48c465 (5000)> tags			1970/01/01 00:00:00 bob @035f65efb448350f4772141702a81ab1df48c465 (5000)> tags
	1970/01/01 00:00:00 bob @035f65efb448350f4772141702a81ab1df48c465 (5000)> writing 24 bytes to cache/hgtagsfnodes1			1970/01/01 00:00:00 bob @035f65efb448350f4772141702a81ab1df48c465 (5000)> writing 36 bytes to cache/hgtagsfnodes2
	1970/01/01 00:00:00 bob @035f65efb448350f4772141702a81ab1df48c465 (5000)> 3/4 cache hits/lookups in * seconds (glob)			1970/01/01 00:00:00 bob @035f65efb448350f4772141702a81ab1df48c465 (5000)> 3/4 cache hits/lookups in * seconds (glob)
	1970/01/01 00:00:00 bob @035f65efb448350f4772141702a81ab1df48c465 (5000)> writing .hg/cache/tags2-visible with 1 tags			1970/01/01 00:00:00 bob @035f65efb448350f4772141702a81ab1df48c465 (5000)> writing .hg/cache/tags2-visible with 1 tags
	1970/01/01 00:00:00 bob @035f65efb448350f4772141702a81ab1df48c465 (5000)> tags exited 0 after * seconds (glob)			1970/01/01 00:00:00 bob @035f65efb448350f4772141702a81ab1df48c465 (5000)> tags exited 0 after * seconds (glob)
	1970/01/01 00:00:00 bob @035f65efb448350f4772141702a81ab1df48c465 (5000)> blackbox -l 6			1970/01/01 00:00:00 bob @035f65efb448350f4772141702a81ab1df48c465 (5000)> blackbox -l 6
	$ f --size .hg/cache/hgtagsfnodes1			$ f --size .hg/cache/hgtagsfnodes2
	.hg/cache/hgtagsfnodes1: size=144			.hg/cache/hgtagsfnodes2: size=216

	$ hg -q --config extensions.strip= strip -r 5 --no-backup			$ hg -q --config extensions.strip= strip -r 5 --no-backup

	Test tag removal:			Test tag removal:

	$ hg tag --remove bar # rev 5			$ hg tag --remove bar # rev 5
	$ hg tip -vp			$ hg tip -vp
	changeset: 5:5f6e8655b1c7			changeset: 5:5f6e8655b1c7
	new changesets 96ee1d7354c4:40f0358cb314			new changesets 96ee1d7354c4:40f0358cb314
	updating to branch default			updating to branch default
	2 files updated, 0 files merged, 0 files removed, 0 files unresolved			2 files updated, 0 files merged, 0 files removed, 0 files unresolved

	Missing tags2* files means the cache wasn't written through the normal mechanism.			Missing tags2* files means the cache wasn't written through the normal mechanism.

	$ ls tagsclient/.hg/cache			$ ls tagsclient/.hg/cache
	branch2-base			branch2-base
	hgtagsfnodes1			hgtagsfnodes2
	rbc-names-v1			rbc-names-v1
	rbc-revs-v1			rbc-revs-v1

	Cache should contain the head only, even though other nodes have tags data			Cache should contain the head only, even though other nodes have tags data

	$ f --size --hexdump tagsclient/.hg/cache/hgtagsfnodes1			$ f --size --hexdump tagsclient/.hg/cache/hgtagsfnodes2
	tagsclient/.hg/cache/hgtagsfnodes1: size=96			tagsclient/.hg/cache/hgtagsfnodes2: size=144
	0000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff \|................\|			0000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff \|................\|
	0010: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff \|................\|			0010: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff \|................\|
	0020: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff \|................\|			0020: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff \|................\|
	0030: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff \|................\|			0030: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff \|................\|
	0040: ff ff ff ff ff ff ff ff 40 f0 35 8c 19 e0 a7 d3 \|........@.5.....\|			0040: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff \|................\|
	0050: 8a 5c 6a 82 4d cf fb a5 87 d0 2f a3 1e 4f 2f 8a \|.\j.M...../..O/.\|			0050: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff \|................\|
				0060: ff ff ff ff ff ff ff ff ff ff ff ff 40 f0 35 8c \|............@.5.\|
				0070: 19 e0 a7 d3 8a 5c 6a 82 4d cf fb a5 87 d0 2f a3 \|.....\j.M...../.\|
				0080: 1e 4f 2f 8a 00 00 00 00 00 00 00 00 00 00 00 00 \|.O/.............\|

	Running hg tags should produce tags2* file and not change cache			Running hg tags should produce tags2* file and not change cache

	$ hg -R tagsclient tags			$ hg -R tagsclient tags
	tip 3:40f0358cb314			tip 3:40f0358cb314
	0.2 2:f63cc8fe54e4			0.2 2:f63cc8fe54e4
	0.1 0:96ee1d7354c4			0.1 0:96ee1d7354c4

	$ ls tagsclient/.hg/cache			$ ls tagsclient/.hg/cache
	branch2-base			branch2-base
	hgtagsfnodes1			hgtagsfnodes2
	rbc-names-v1			rbc-names-v1
	rbc-revs-v1			rbc-revs-v1
	tags2-visible			tags2-visible

	$ f --size --hexdump tagsclient/.hg/cache/hgtagsfnodes1			$ f --size --hexdump tagsclient/.hg/cache/hgtagsfnodes2
	tagsclient/.hg/cache/hgtagsfnodes1: size=96			tagsclient/.hg/cache/hgtagsfnodes2: size=144
	0000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff \|................\|			0000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff \|................\|
	0010: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff \|................\|			0010: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff \|................\|
	0020: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff \|................\|			0020: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff \|................\|
	0030: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff \|................\|			0030: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff \|................\|
	0040: ff ff ff ff ff ff ff ff 40 f0 35 8c 19 e0 a7 d3 \|........@.5.....\|			0040: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff \|................\|
	0050: 8a 5c 6a 82 4d cf fb a5 87 d0 2f a3 1e 4f 2f 8a \|.\j.M...../..O/.\|			0050: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff \|................\|
				0060: ff ff ff ff ff ff ff ff ff ff ff ff 40 f0 35 8c \|............@.5.\|
				0070: 19 e0 a7 d3 8a 5c 6a 82 4d cf fb a5 87 d0 2f a3 \|.....\j.M...../.\|
				0080: 1e 4f 2f 8a 00 00 00 00 00 00 00 00 00 00 00 00 \|.O/.............\|

	Check that the bundle includes cache data			Check that the bundle includes cache data

	$ hg -R tagsclient bundle --all ./test-cache-in-bundle-all-rev.hg			$ hg -R tagsclient bundle --all ./test-cache-in-bundle-all-rev.hg
	4 changesets found			4 changesets found
	$ hg debugbundle ./test-cache-in-bundle-all-rev.hg			$ hg debugbundle ./test-cache-in-bundle-all-rev.hg
	Stream params: {Compression: BZ}			Stream params: {Compression: BZ}
	changegroup -- {nbchanges: 4, version: 02} (mandatory: True)			changegroup -- {nbchanges: 4, version: 02} (mandatory: True)

Diff	ID	Base	Description	Created	Lint	Unit
Base			Base
Diff 1	22032			Jul 21 2020, 6:25 PM	★	★