check-code: allow old style class with special comments The following chgserver change will use an old style class to comply with SocketServer's code style. This patch made it possible to pass check-code.

merge with stable

revset: use smartset minus operator Previously, revsets like 'X - Y' were translated to be 'X and not Y'. This can be expensive, since if Y is a single commit then 'not Y' becomes a huge set and sometimes the query optimizer doesn't account for it well. This patch changes revsets to use the built in smartset minus operator, which is often smarter than 'X and not Y'. On a large repo this saves 2.2 seconds on rebase and histedit because "X:: - X" becomes almost instant. Relevant performance numbers from revsetbenchmark.py revset #13: roots((tip~100::) - (tip~100::tip)) plain min max first last reverse rev..rst rev..ast sort sor..rst sor..ast 0) 0.001080 0.001107 0.001102 0.001118 0.001121 0.001114 0.001141 0.001123 0.001099 0.001123 0.001137 1) 0.000708 65% 0.000738 66% 0.000735 66% 0.000739 66% 0.000784 69% 0.000780 70% 0.000807 70% 0.000756 67% 0.000727 66% 0.000759 67% 0.000808 71% revset #14: roots((0::) - (0::tip)) plain min max first last reverse rev..rst rev..ast sort sor..rst sor..ast 0) 0.131304 0.079168 0.133129 0.076560 0.048179 0.133349 0.049153 0.077097 0.129689 0.076212 0.048543 1) 0.065066 49% 0.036941 46% 0.066063 49% 0.034755 45% 0.048558 0.071091 53% 0.047679 0.034984 45% 0.064572 49% 0.035680 46% 0.048508 revset #22: (not public() - obsolete()) plain min max first last reverse rev..rst rev..ast sort sor..rst sor..ast 0) 0.000139 0.000133 0.000133 0.000138 0.000134 0.000155 0.000157 0.000152 0.000157 0.000156 0.000153 1) 0.000108 77% 0.000129 0.000129 0.000134 0.000132 0.000127 81% 0.000151 0.000147 0.000127 80% 0.000152 0.000149 revset #25: (20000::) - (20000) plain min max first last reverse rev..rst rev..ast sort sor..rst sor..ast 0) 0.050560 0.045513 0.022593 0.043588 0.021909 0.045517 0.021822 0.044660 0.049740 0.044227 0.021819 1) 0.018614 36% 0.000171 0% 0.019659 87% 0.000168 0% 0.015543 70% 0.021069 46% 0.015623 71% 0.000180 0% 0.018658 37% 0.000186 0% 0.015750 72%

histedit: make histedit aware of obsolescense not stored in state (issue4800) Before this change, when histedit exited to interactive session (during edit command for example), user could introduce obsolescence markers that would not be known to histedit. For example, user could've amended one of the commits. The fact of this amendment would not be stored in histedit's state file and later, when histedit would try to process all the replacements, one of the final successors (in histedit's opinion) would turn out to be hidden. This behavior is described in issue4800. This commit fixes it.

treemanifest: allow setting flag to 't' When using treemanifests, an on-disk manifest entry with the 't' flag set means that that entry is a directory and not a file. When read into memory, these become instances of the treemanifest class. The 't' flag should therefore never be visible to outside of manifest.py, so setflag() checks that it is not called with the 't' flag. However, it turns out that it will be useful for the narrowhg extension to expose the 't' flag to the user (see below), so let's drop the assertion. The narrowhg extension allows cloning only a given set of files and directories. Filelogs and dirlogs that don't match that set will not be included in the clone. The extension currently doesn't work with treemanifests. I plan on changing it so directories outside the narrow clone appear in the manifest. For example, if a directory 'outside/' is not part of the narrow clone, it will look like a file 'outside' with the 't' flag set. That will make e.g. manifestmerge() just work in most cases (and make it well prepared to handle the other cases).

treemanifest: use "cp xyz/." instead of "cp xyz/*" This is more similar to cp -T because it covers hidden files.

templatefilters: drop old jsonescape() function It's been superseded by encoding.jsonescape(paranoid=True).

templatefilters: make json filter be byte-transparent (BC) (issue4926) This is necessary to preserve filename encoding over JSON. Instead, this patch inserts "|utf8" where non-ascii local-encoding texts can be passed to "|json". See also the commit that introduced "utf8" filter.

hgweb: add option to convert encoding of graphdata() Because future patches will change "|json" filter to handle input bytes transparently, i.e. use UTF-8b encoding, "{jsdata}" must keep data in UTF-8 bytes, whereas "{nodes}" are text. This patch inserts encodestr() where localstr is likely to survive.

hgweb: remove unused argument from graphdata() factory As graphdata() is wrapped by lambda, there's no reason to pass unused arguments to it.

templatefilters: add "utf8" to get utf-8 bytes from local-encoding text This will be applied prior to "|json" filter. This sounds like odd, but it is necessary to handle local-encoding text as well as raw filename bytes. Because filenames are bytes in Mercurial and Unix world, {filename|json} should preserve the original byte sequence, which implies {x|json} -> '"' toutf8b(x) '"' On the other hand, most template strings are in local encoding. Because "|json" filter have to be byte-transparent to filenames, we need something to annotate an input as a local string, that's what "|utf8" will do. {x|utf8|json} -> '"' toutf8b(fromlocal(x)) '"' "|utf8" is an explicit call, so aborts if input bytes can't be converted to UTF-8.

templatefilters: drop broken "jsonescape" from filters table (BC) It's been unused, undocumented and flawed in that it expects a unicode input, never works correctly if an input has non-ascii character. We should use "json" filter instead.

treemanifest: rewrite text() using iterentries() This simplifies a bit. Note that the function is only used when manually testing with _treeinmem=True.

treemanifest: implement iterentries() To make tests pass with _treeinmem manually set to True, we need to implement the recently added iterentries() on the treemanifest class too.

verify: show progress while verifying dirlogs In repos with treemanifests, the non-root-directory dirlogs often have many more total revisions than the root manifest log has. This change adds progress out to that part of 'hg verify'. Since the verification is recursive along the directory tree, we don't know how many total revisions there are at the beginning of the command, so instead we report progress in units of directories, much like we report progress for verification of files today. I'm not very happy with passing both 'storefiles' and 'progress' into the recursive calls. I tried passing in just a 'visitdir(dir)' callback, but the results did not seem better overall. I'm happy to update if anyone has better ideas.

verify: check for orphaned dirlogs We already report orphaned filelogs, i.e. revlogs for files that are not mentioned in any manifest. This change adds checking for orphaned dirlogs, i.e. revlogs that are not mentioned in any parent-directory dirlog. Note that, for fncachestore, only files mentioned in the fncache are considered, there's not check for files in .hg/store/meta that are not mentioned in the fncache. This is no different from the current situation for filelogs.

verify: check directory manifests In repos with treemanifests, there is no specific verification of directory manifest revlogs. It simply collects all file nodes by reading each manifest delta. With treemanifests, that's means calling the manifest._slowreaddelta(). If there are missing revlog entries in a subdirectory revlog, 'hg verify' will simply report the exception that occurred while trying to read the root manifest: manifest@0: reading delta 1700e2e92882: meta/b/00manifest.i@67688a370455: no node This patch changes the verify code to load only the root manifest at first and verify all revisions of it, then verify all revisions of each direct subdirectory, and so on, recursively. The above message becomes b/@0: parent-directory manifest refers to unknown revision 67688a370455 Since the new algorithm reads a single revlog at a time and in order, 'hg verify' on a treemanifest version of the hg core repo goes from ~50s to ~14s. As expected, there is no significant difference on a repo with flat manifests.

hg: perform update after pulling during clone with share (issue5103) When pooled storage is enabled, `hg clone` will initialize a repo from a local repo using the store sharing mechanism then pull from the originally requested repo. Before this patch, the working directory update occurred between these steps. This meant that we would only update to revisions that were already present in the local pooled storage. This patch moves the update to after we pull from the originally requested repository so we may check out a revision that didn't yet exist locally. In other words, it makes the behavior like normal `hg clone`.

hg: extract post share update logic into own function A future patch will introduce a new caller that needs to perform an update. Extract the code so we don't duplicate it.

merge: perform background file closing in batchget As 2fdbf22a1b63 demonstrated with stream clones, closing files on background threads on Windows can yield a significant speedup because closing files that have been created/appended to is slow on Windows/NTFS. Working directory updates can write thousands of files. Therefore it is susceptible to excessive slowness on Windows due to slow file closes. This patch enables background file closing when performing working directory file writes. The impact when performing an `hg up tip` on mozilla-central (136,357 files) from an empty working directory is significant: Before: 535s (8:55) After: 133s (2:13) Delta: -402s (6:42) That's a 4x speedup! By comparison, that same machine can perform the same operation in ~15s on Linux. So Windows went from ~35x to ~9x slower. Not bad but there's still work to do. As a reminder, background file closing is only activated on Windows because it is only beneficial on that platform. So this patch shouldn't change non-Windows behavior at all. It's worth noting that non-Windows systems perform working directory updates with multiple processes. Unfortunately, worker.py doesn't yet support Windows. So, there is still plenty of room for making working directory updates faster on Windows. Even if multiple processes are used on Windows, I believe background file closing will still provide a benefit, as individual processes will still be slowed down by the file close bottleneck (assuming the I/O system isn't saturated).

merge: indent code in batchget() To make the next patch easier to read.

localrepo: support background closing for wwrite() So working copy update can pass it in.

scmutil: support background closing for write() Upcoming patches will add background file closer support to working copy update. This patch adds some plumbing to prepare for that.

chg: hold a lock file before connected to server This is a part of the one server per config series. In multiple-server setup, multiple clients may try to start different servers (on demand) at the same time. The old lock will not guarantee a client to connect to the server it just started, and is not crash friendly. This patch addressed above issues by using flock and does not release the lock until the client actually connects to the server or times out.

serve: allow --daemon-postexec to be 'unlink:path' or 'none' This patch changes the format of value of --daemon-postexec. Now it can be either to unlink a file, or a no-op. The following patch will make chg to use the no-op option.

serve: rename --daemon-pipefds to --daemon-postexec (BC) Initially we use --daemon-pipefds to pass file descriptors for synchronization. Later, in order to support Windows, --daemon-pipefds is changed to accept a file path to unlink instead. The name is outdated since then. chg client is designed to use flock, which will be held before starting a server and until the client actually connects to the server it started. The unlink synchronization approach is not so helpful in this case. To address the issues, this patch renames pipefds to postexec and the following patch will allow the value of --daemon-postexec to be things like 'unlink:/path/to/file' or 'none'.

largefiles: don't explicitly list optional parameters that are not used This makes it easier for changes to the API.

revert: properly revert to ancestor of p2 during merge (issue5052) During merge, added (from one perspective) file can be reported as "modified". To work around that, revert was testing if modified file were present in the parent manifest and marking them as "added" in this case. However, we should be checking against the target revision manifest instead. Otherwise see file as "newly added" even if they exist in the target revision. That revert behavior regressed in 06fbd9518bc5.

help: hg.intevation.de is new primary name of hg.intevation.de (and new cert) Adjust the examples (prefix and hostfingerprints) in help/config.txt https://hg.intevation.de/ is now served with a new certificate that is signed by a commercial CA, so all nearly all browsers will accept it automatically. Listing both names, hg.intevation.de and hg.intevation.org, in the section [hostfingerprints] allows using both without configuring web.cacerts and without changing existing https URLs in the [paths] section.

rebase: explicitly test abort from ambiguous destination We want to explicitly test the next behavior. We add this test in its own changeset to make the test change from the behavior change as clean as possible.