largefiles: extract 'orig' method in reposetup.status

largefiles: extract 'orig' method in lfilesctx.filectx

largefiles: extract 'orig' method in lfilesmanifestdict.__contains__

largefiles: reduce indentation by dropping 'else' block after 'return'

largefiles: remove dead assignment left over from change 1ff42ee98446

match: simplify brittle predicate construction In match.__init__(), we create the matchfn predicate by and-ing together the individual predicates for includes, excludes (negated) and patterns. Instead of the current set of nested if/else blocks, we can simplify by adding the predicates to a list and defining the overall predicate in a generic way based on the components. We can still optimize it for the 0-length and 1-length cases. This way, there is no combinatorial explosion to deal with if new component predicates are added, and there is less risk of getting the overall predicate wrong.

convert: change default for git rename detection to 50% This default mirrors the default for 'git diff'. Other commands have slightly different defaults -- for example, the move/copy detection for 'git blame' assumes that a hunk is moved if more than 40 alphanumeric characters are the same, or copied if more than 20 alphanumeric characters are the same. 50% seems to be the most common default, though.

convert: simplify git.similarity parsing

revset: fast implementation for fullreposet.__and__ "And" operation with something that contains the whole repo should be super cheap. Check method docstring for details. This provide massive boost to simple revset that use `subset & xxx` revset #0: p1(20000) 0) wall 0.002447 comb 0.010000 user 0.010000 sys 0.000000 (best of 767) 1) wall 0.000529 comb 0.000000 user 0.000000 sys 0.000000 (best of 3947) revset #1: p2(10000) 0) wall 0.002464 comb 0.000000 user 0.000000 sys 0.000000 (best of 913) 1) wall 0.000530 comb 0.000000 user 0.000000 sys 0.000000 (best of 4226) No other regression spotted. More performance improvements are expected in the future as more revset predicate are converted to use `subset & xxx` The relaxed way `fullreposet` handles "&" operation may cause some trouble for people comparing smartset from different filter levels. I'm not sure such people exist and we can improve that aspect in later patches.

revset: turn spanset into a factory function We rename the `spanset` class to `_spanset`. `spanset` is now a function that builds either a `fullreposet` or a `_spanset` according to the argument passed. At some point, we may force people to explicitly use the `fullreposet` constructor, but the current approach makes it easier to ensure we use the new class whenever possible and focus on the benefits of this class.

revert: add a fullreposet class Every revset evaluation starts from `subset = spanset(repo)` and a lot of revset predicates build a `spansetrepo` for their internal needs. `spanset` is a generic class that can handle any situation. As a result a lot of operation between spanset result in an `orderedlazyset`, a safe object but suboptimal in may situation. So we introduce a `fullreposet` class where some of the operation will be overwritten to produce more interesting results.

obsolete: ensure that `getrevs` always return a set When a set of revisions was empty, we were using an empty tuple. We now return an empty frozenset to ensure the object could be used in an operation that requires a set.

hgweb: fail if an invalid command was supplied in url path (issue4071) Traditionally, the way to specify a command for hgweb was to use url query arguments (e.g. "?cmd=batch"). If the command is unknown to hgweb, it gives an error (e.g. "400 no such method: badcmd"). But there's also another way to specify a command: as a url path fragment (e.g. "/graph"). Before, hgweb was made forgiving (looks like it was made in 44c5157474e7) and user could put any unknown command in the url. If hgweb couldn't understand it, it would just silently fall back to the default command, which depends on the actual style (e.g. for paper it's shortlog, for monoblue it's summary). This was inconsistent and was breaking some tools that rely on http status codes (as noted in the issue4071). So this patch changes that behavior to the more consistent one, i.e. hgweb will now return "400 no such method: badcmd". So if some tool was relying on having an invalid command return http status code 200 and also have some information, then it will stop working. That is, if somebody typed foobar when they really meant shortlog (and the user was lucky enough to choose a style where the default command is shortlog too), that fact will now be revealed. Code-wise, the changed if block is only relevant when there's no "?cmd" query parameter (i.e. only when command is specified as a url path fragment), and looks like the removed else branch was there only for falling back to default command. With that removed, the rest of the code works as expected: it looks at the command, and if it's not known, raises a proper ErrorResponse exception with an appropriate message. Evidently, there were no tests that required the old behavior. But, frankly, I don't know any way to tell if anyone actually exploited such forgiving behavior in some in-house tool.

keepalive: fix how md5 is used The code in keepalive dates from when it was importing the md5 module directly and uses md5.new. Since then, what 'md5' means has been changed from an import of the md5 module to being a function using the right module between hashlib and md5, so the md5.new idiom doesn't work anymore.

merge with stable

revset: add an optimised baseset.__contains__ (issue4371) The baseset class is based on a python list. This means that base.__contains__ was absolutely as crappy as list.__contains__. We now rely on __contains__ from the underlying set. This will avoid having to explicitly convert the baseset to a set (using baseset.set()) whenever one want fast membership test. Apparently there is already code that forgot to do such conversions since we observe a massive speedup in some test. revset #25: roots((0::) - (0::tip)) 0) wall 2.079454 comb 2.080000 user 2.080000 sys 0.000000 (best of 5) 1) wall 0.132970 comb 0.130000 user 0.130000 sys 0.000000 (best of 65) No regression is observed in benchmarks. This change improve the issue4371 back to acceptable situation (but are still slower than manual substraction)

merge with stable

commands: deprecate the parents commands It's replaced by 'hg summary' or hg log -r 'parents(foo)' and doesn't need to take up space in our command list anymore.

revset: remove nullrev from the bookmark computation Same as for other revset we sanitize the content of the set to be able to rely on it more.

revset: unify code flow in `bookmark` We refactor the code of the bookmark revset to have a single return. This will allow us to sanitize the content of the set.

revset: remove invalid value in the origin set Same as the parents related revsets, origin had some invalid value in the computed set. We remove them.

revset: remove nullrev from set computed in parents() The old code relied on the subset contents to get rid of invalid values. We would like to be able to rely more on the computation in parents() so we filter out the invalid value.

revset: refactor parents() into a single return point Both paths are doing similar thing in the end. We refactor the function so that the `ps` set is commonly used at the end. This will end excluding `nullrev` from this set in a future patch

revset: remove nullrev from set computed in p1() and p2() The old code relied on the subset contents to get rid of invalid values. We would like to be able to rely more on the computation in p1() and p2() so we filter out the invalid value

revset: document the choice made in __generatorset.__iter__ The method code looks a bit ugly but has good reasons to. We document them to prevent naive refactoring in the future.

help: mention mode in hg log --removed help (issue4381)

commit: catch changed exec bit on files from p1 (issue4382)

revert: add a `drop` action This prevents the need for a try except in the `_performrevert` code.

revert: explicitly track added but deleted file Added + deleted file are files that need to be untracked from the dirstate but that are already missing on disk. The current `_performrevert` code is handling that with exception catching. We will be able to do better with a dedicated set.

revert: have an explicit action for "forget" The distinction between "remove" and "forget" used to be in special logic checking for the state of the file in the dirstate. Now that we have dedicated filtering, we can stop relying on this logic and have two distinct actions.

revert: split between newly added file and file added in other changeset These two kinds of files are handled differently. One is deleted and the other is just forgotten (the file is untracked but left in place). The distinction is done in the `_performrevert` code itself and we would like to get ride of this.

revset: stop using a baseset instead of a plain list in _revsbetween The function internal code needs a list. Lets use a list.