Gregory Szorc 2afb6aff3e extensions: refuse to load extensions if minimum hg version not met ... As the author of several 3rd party extensions, I frequently see bug reports from users attempting to run my extension with an old version of Mercurial that I no longer support in my extension. Oftentimes, the extension will import just fine. But as soon as we run extsetup(), reposetup(), or get into the guts of a wrapped function, we encounter an exception and abort. Today, Mercurial will print a message about extensions that don't have a "testedwith" declaring explicit compatibility with the current version. The existing mechanism is a good start. But it isn't as robust as I would like. Specifically, Mercurial assumes compatibility by default. This means extension authors must perform compatibility checking in their extsetup() or we wait and see if we encounter an abort at runtime. And, compatibility checking can involve a lot of code and lots of error checking. It's a lot of effort for extension authors. Oftentimes, extension authors know which versions of Mercurial there extension works on and more importantly where it is broken. This patch introduces a magic "minimumhgversion" attribute in extensions. When found, the extension loading mechanism will compare the declared version against the current Mercurial version. If the extension explicitly states we require a newer Mercurial version, a warning is printed and the extension isn't loaded beyond importing the Python module. This causes a graceful failure while alerting the user of the compatibility issue. I would be receptive to the idea of making the failure more fatal. However, care would need to be taken to not criple every hg command. e.g. the user may use `hg config` to fix the hgrc and if we aborted trying to run that, the user would effectively be locked out of `hg`! A potential future improvement to this functionality would be to catch ImportError for the extension/module and parse the source code for "minimumhgversion = 'XXX'" and do similar checking. This way we could give more information about why the extension failed to load.		2015-11-24 15:16:25 -08:00
..
default.d	mergetools.rc: find OSX FileMerge in the new location inside Xcode 4.3	2015-10-16 11:37:34 +02:00
help	format: create new repository as 'generaldelta' by default	2015-11-02 17:33:18 +00:00
hgweb	hgweb: extract factory function of httpservice object	2015-10-31 22:15:16 +09:00
httpclient	global: mass rewrite to use modern exception syntax	2015-06-23 22:20:08 -07:00
pure	osutil: remove Python 2.4 errno conversion workaround	2015-06-22 10:11:31 -07:00
templates	paper: show current revision on file log page	2015-11-13 18:31:58 +08:00
__init__.py
ancestor.py	ancestor: use absolute_import	2015-08-07 19:45:48 -07:00
archival.py	error: get Abort from 'error' instead of 'util'	2015-10-08 12:55:45 -07:00
base85.c	base85: clean up function definition style	2015-11-11 19:10:45 -05:00
bdiff.c	bdiff: avoid a memory error on malloc failure	2013-10-30 16:03:42 -05:00
bookmarks.py	bookmarks: use repo._bookmarks.recordchange instead of repo._bookmarks.write	2015-11-17 12:49:57 -08:00
branchmap.py	error: get Abort from 'error' instead of 'util'	2015-10-08 12:55:45 -07:00
bundle2.py	bundle2: attribute remote failures to remote (issue4788)	2015-10-24 00:39:22 +01:00
bundlerepo.py	bundlerepo: properly extract compressed changegroup from bundle2	2015-10-19 16:01:55 +02:00
byterange.py	global: mass rewrite to use modern exception syntax	2015-06-23 22:20:08 -07:00
changegroup.py	changegroup: back code change of b5988e1d3dcb out	2015-11-06 13:01:15 -05:00
changelog.py	reachableroots: construct and sort baseset in revset module	2015-08-28 11:14:24 +09:00
cmdutil.py	ui: remove labeled argument from popbuffer	2015-11-24 11:23:10 -08:00
commands.py	serve: unify cmdutil.service() calls of commandserver and hgweb	2015-10-31 22:17:05 +09:00
commandserver.py	error: get Abort from 'error' instead of 'util'	2015-10-08 12:55:45 -07:00
config.py	config: use absolute_import	2015-08-08 00:28:53 -07:00
context.py	context: avoid extra parents lookups	2015-11-21 19:21:01 -08:00
copies.py	spelling: trivial spell checking	2015-10-17 00:58:46 +02:00
crecord.py	spelling: trivial spell checking	2015-10-17 00:58:46 +02:00
dagparser.py	error: get Abort from 'error' instead of 'util'	2015-10-08 12:55:45 -07:00
dagutil.py	dagutil: use absolute_import	2015-08-08 19:04:09 -07:00
demandimport.py	demandimport: don't enable when running under PyPy	2015-11-21 22:28:01 -08:00
destutil.py	destmerge: extract logic based on branch heads in its own function	2015-10-15 03:15:54 +01:00
diffhelpers.c	diffhelpers: fix botched return statement from e48d70075d8a	2015-01-28 13:34:20 -05:00
dirs.c	dirs._addpath: reinstate use of Py_CLEAR	2015-04-07 20:43:04 -07:00
dirstate.py	util: drop statmtimesec	2015-11-19 13:15:17 -06:00
discovery.py	discovery: pass pushop to _nowarnheads	2015-11-10 11:16:25 -08:00
dispatch.py	dispatch: use versiontuple()	2015-11-24 14:23:46 -08:00
dummycert.pem	ssl: on OS X, use a dummy cert to trick Python/OpenSSL to use system CA certs	2014-09-26 02:19:48 +02:00
encoding.py	encoding: extend test cases for utf8b	2015-11-02 17:17:33 -06:00
error.py	error: add a structured exception for unsupported merge records	2015-11-17 14:10:12 -08:00
exchange.py	exchange: do not attempt clone bundle if local repo is non-empty (issue4932)	2015-11-03 12:16:54 -08:00
exewrapper.c	exewrapper: add comments about PYTHONHOME	2015-10-14 12:23:49 +02:00
extensions.py	extensions: refuse to load extensions if minimum hg version not met	2015-11-24 15:16:25 -08:00
fancyopts.py	error: get Abort from 'error' instead of 'util'	2015-10-08 12:55:45 -07:00
filelog.py	filelog: use absolute_import	2015-08-08 19:11:42 -07:00
filemerge.py	filemerge: in ':prompt', use ':fail' tool rather than returning directly	2015-11-24 10:58:35 -08:00
fileset.py	fileset: add missing() predicate (issue4925)	2015-11-18 20:55:32 +01:00
formatter.py	error: get Abort from 'error' instead of 'util'	2015-10-08 12:55:45 -07:00
graphmod.py	graphmod: compute slow revset query once prior to reachableroots (issue4782)	2015-09-08 23:00:44 +09:00
hbisect.py	error: get Abort from 'error' instead of 'util'	2015-10-08 12:55:45 -07:00
help.py	help: replace some str.split() calls by str.partition() or str.rpartition()	2015-11-02 23:37:14 +08:00
hg.py	spelling: trivial spell checking	2015-10-17 00:58:46 +02:00
hook.py	hooks: back e7b51de6e8eb out	2015-11-06 11:08:11 -05:00
httpconnection.py	httpconnection: remove a mutable default argument	2015-09-24 00:54:30 -07:00
httppeer.py	error: get Abort from 'error' instead of 'util'	2015-10-08 12:55:45 -07:00
i18n.py	i18n: use absolute_import	2015-08-08 19:28:49 -07:00
keepalive.py	global: mass rewrite to use modern exception syntax	2015-06-23 22:20:08 -07:00
localrepo.py	localrepo: improve docstring for revset methods	2015-11-21 11:07:30 -08:00
lock.py	lock: add a way to prevent locks from being inherited	2015-10-06 13:13:31 -07:00
lsprof.py	lsprof: support PyPy (issue4573)	2015-11-21 23:26:22 -08:00
lsprofcalltree.py
mail.py	mail: drop python 2.5 self.sock.read workaround	2015-10-15 17:24:42 -04:00
manifest.c	lazymanifest: prevent leak when updating an entry more than once	2015-04-11 11:56:21 -04:00
manifest.py	manifest: skip fastdelta if the change is large	2015-11-05 18:56:40 -08:00
match.py	spelling: trivial spell checking	2015-10-17 00:58:46 +02:00
mdiff.py	error: get Abort from 'error' instead of 'util'	2015-10-08 12:55:45 -07:00
merge.py	merge: move almost all change/delete conflicts to resolve phase (BC) (API)	2015-11-25 14:25:33 -08:00
minirst.py	spelling: trivial spell checking	2015-10-17 00:58:46 +02:00
mpatch.c	mpatch: rewrite pointer overflow checks	2013-12-11 18:33:42 -06:00
namespaces.py	namespaces: use absolute_import	2015-08-08 19:42:58 -07:00
node.py	node: add 'nullhex', hex-encoded nullid	2015-11-16 11:23:32 -08:00
obsolete.py	obsstore: make the readonly attribute accessible	2015-10-15 12:45:34 +01:00
osutil.c	osutil: make statfiles check for interrupts periodically	2015-11-17 13:47:14 -08:00
parser.py	parser: move unescape helper from templater	2015-09-10 23:25:10 +09:00
parsers.c	parsers: fix width of datalen variable in fm1readmarkers	2015-11-07 17:43:20 +09:00
patch.py	spelling: trivial spell checking	2015-10-17 00:58:46 +02:00
pathencode.c	pathencode: check result of .digest() method in sha1hash	2015-08-18 16:32:41 -04:00
pathutil.py	error: get Abort from 'error' instead of 'util'	2015-10-08 12:55:45 -07:00
peer.py	peer: use absolute_import	2015-08-08 19:45:45 -07:00
phases.py	phase: improve retractboundary perf	2015-11-07 16:11:49 -08:00
posix.py	posix: fix test-permissions regression	2015-11-09 15:53:11 -06:00
progress.py	spelling: trivial spell checking	2015-10-17 00:58:46 +02:00
pushkey.py	pushkey: use absolute_import	2015-08-08 19:57:27 -07:00
pvec.py	pvec: replace 'ctx._repo' with 'ctx.repo()'	2015-03-12 23:18:20 -04:00
py3kcompat.py	py3kcompat: drop unused export	2014-05-13 15:22:36 -05:00
repair.py	strip: pass source and url to bundle2 processing	2015-10-20 16:01:33 +02:00
repoview.py	repoview: use absolute_import	2015-08-08 19:58:05 -07:00
revlog.py	revlog: improve documentation	2015-11-22 16:23:20 -08:00
revset.py	revset: speed up '_matchfiles'	2015-11-18 23:23:03 -08:00
scmposix.py	config: don't read the same config file twice	2014-09-04 21:36:35 +02:00
scmutil.py	format: create new repository as 'generaldelta' by default	2015-11-02 17:33:18 +00:00
scmwindows.py	windows: read all global config files, not just the first (issue4491) (BC)	2015-10-12 20:13:12 +02:00
setdiscovery.py	error: get Abort from 'error' instead of 'util'	2015-10-08 12:55:45 -07:00
similar.py	cleanup: eradicate long lines	2012-05-12 15:54:54 +02:00
simplemerge.py	simplemerge: move conflict warning message to filemerge	2015-10-09 13:54:52 -07:00
sshpeer.py	spelling: trivial spell checking	2015-10-17 00:58:46 +02:00
sshserver.py	error: get Abort from 'error' instead of 'util'	2015-10-08 12:55:45 -07:00
sslutil.py	error: get Abort from 'error' instead of 'util'	2015-10-08 12:55:45 -07:00
statichttprepo.py	error: get Abort from 'error' instead of 'util'	2015-10-08 12:55:45 -07:00
store.py	l10n: use %d instead of %s for numbers	2015-10-14 22:29:03 -04:00
streamclone.py	streamclone: support for producing and consuming stream clone bundles	2015-10-17 11:14:52 -07:00
strutil.py	strutil: use absolute_import	2015-08-08 20:01:40 -07:00
subrepo.py	git-subrepos: revert respects specified location to save .orig files	2015-11-10 14:29:13 -08:00
tagmerge.py	tagmerge: use absolute_import	2015-08-08 20:10:46 -07:00
tags.py	tags: create new sortdict for performance reasons	2015-11-12 13:16:04 -08:00
templatefilters.py	templatefilters: try round-trip utf-8 conversion by json filter (issue4933)	2015-11-04 23:48:15 +09:00
templatekw.py	templatekw: add {changes}, {distance} and {tag} to the {latesttag} keyword	2015-08-24 23:30:17 -04:00
templater.py	error: get Abort from 'error' instead of 'util'	2015-10-08 12:55:45 -07:00
transaction.py	spelling: fix typo in transaction error messages	2015-10-17 15:28:02 -05:00
treediscovery.py	error: get Abort from 'error' instead of 'util'	2015-10-08 12:55:45 -07:00
ui.py	ui: remove labeled argument from popbuffer	2015-11-24 11:23:10 -08:00
unionrepo.py	error: get Abort from 'error' instead of 'util'	2015-10-08 12:55:45 -07:00
url.py	url: drop support for python2.5	2015-10-15 17:21:08 -04:00
util.h	util: fix the check for non-C99 compilers (issue4605)	2015-04-20 22:21:57 -05:00
util.py	util: add versiontuple() for returning parsed version information	2015-11-24 14:23:51 -08:00
verify.py	verify: add a hook that can let extensions manipulate file lists	2015-11-04 12:14:18 -05:00
win32.py	win32: use absolute_import	2015-08-08 18:52:59 -07:00
windows.py	windows: insert file positioning call between reads and writes	2015-09-27 18:46:53 -07:00
wireproto.py	wireproto: move clonebundles command from extension (issue4931)	2015-11-03 12:31:33 -08:00
worker.py	error: get Abort from 'error' instead of 'util'	2015-10-08 12:55:45 -07:00