match: allow passing in badfn to always() and never() So that no callers are required to access the matchers themselves. Differential Revision: https://phab.mercurial-scm.org/D5926

py3: use raw strings and %d for formatting Before the string compares on Python 3 failed because we were comparing bytes to str. Using raw strings ensures we are always comparing str. While we're here, also use %d to format integers. Differential Revision: https://phab.mercurial-scm.org/D5925

diff: make --stat respect ui.relative-paths It would have been easy to make all diffs respect ui.relative-paths, but we don't want that since it makes the diff invalid. Perhaps it makes sense to do that with --noprefix since the point of that is to make paths that are easy to copy&paste, and the diff is already invalid anyway. But this patch just makes the --stat version respect the config option. The --stat view is not even close to a valid diff, so I think it makes sense to show the paths in more human-friendly form. Differential Revision: https://phab.mercurial-scm.org/D5896

match: delete unused argument "listsubrepos" from _buildmatch() Seems to have been unused since 9f9ffe5f687c (match: compose 'set:' pattern as matcher, 2018-06-10). Differential Revision: https://phab.mercurial-scm.org/D5924

match: delete unused rel() (API) Differential Revision: https://phab.mercurial-scm.org/D5923

largefiles: get cwd and relative paths from repo instead of matcher As far as I can tell, the matcher returned from matchandpats() got its cwd from the context object, which in turn got it from the repo, so this should be equivalent. Differential Revision: https://phab.mercurial-scm.org/D5922

scmutil: remove special handling of pats==("",) in matchandpats() (API) I don't know under what circumstances we used to pass that value, but we don't seem to do it now. Differential Revision: https://phab.mercurial-scm.org/D5921

scmutil: respect ui.relative-paths in default match.badfn We should probably be passing in a uipathfn here instead, so the caller can get consistent output (between match.badfn and whatever else it prints). I think we should ideally remove the badfn from the matcher completely, but that's a different story. This patch is at least not making it worse. Differential Revision: https://phab.mercurial-scm.org/D5916

cmdutil: migrate previously missed instances to uipathfn I seem to have missed these two instances in 15f63ac122ea (files: respect ui.relative-paths, 2019-01-29) and 7068c6b0114b (revert: respect ui.relative-paths, 2019-02-05). Differential Revision: https://phab.mercurial-scm.org/D5915

cat: respect ui.relative-paths for "skipping missing subrepository" Differential Revision: https://phab.mercurial-scm.org/D5914

addremove: use uipathfn instead of m.rel() for recorded similatity message When no path arguments are given to addremove, it generally prints absolute paths. However, before this patch, we would always print the "recording removal of foo as rename to bar (78% similar)" message with relative paths. Differential Revision: https://phab.mercurial-scm.org/D5913

forget: use relative paths for --interactive Seems more consistent. Differential Revision: https://phab.mercurial-scm.org/D5912

automv: respect ui.relative-paths Differential Revision: https://phab.mercurial-scm.org/D5910

debugwalk: avoid match.rel() and use repo.pathto() instead I'm about to delete match.rel() Differential Revision: https://phab.mercurial-scm.org/D5909

match: delete unused abs() (API) Differential Revision: https://phab.mercurial-scm.org/D5908

copy: respect ui.relative-paths in copy/rename Differential Revision: https://phab.mercurial-scm.org/D5907

match: delete unused uipath() and _uipathrelative (API) Differential Revision: https://phab.mercurial-scm.org/D5906

diff: respect ui.relative-paths for warning about path outside --root I set legacyrelativevalue=True rather than being based on what patterns the user passed (as the current match.uipath() does). I think it simply doesn't really matter for this message (there are not even any tests for it). Differential Revision: https://phab.mercurial-scm.org/D5905

largefiles: use uipathfn instead of match.{rel,uipath}() (API) All callers now pass in a uipathfn, so we can just use that instead of choosing the right match function. This also means that when we make add/remove respect ui.relative-paths, it will work for largefiles too. Differential Revision: https://phab.mercurial-scm.org/D5904

forget: pass around uipathfn and use instead of m.rel() (API) Differential Revision: https://phab.mercurial-scm.org/D5911

addremove: pass around uipathfn and use instead of m.uipath() (API) Differential Revision: https://phab.mercurial-scm.org/D5903

remove: pass around uipathfn and use instead of m.rel() (API) Same as previous commit, but now for remove. Differential Revision: https://phab.mercurial-scm.org/D5902

add: pass around uipathfn and use instead of m.rel() (API) For now, the uipathfn we pass around always prints relative paths just like before, so this should have no effect. Well, there's one little change: I also made the "skipping missing subrepository: %s\n" message relative. Differential Revision: https://phab.mercurial-scm.org/D5901

subrepo: (mostly) use relative path in "skipping missing subrepository" This is consistent with the other messages printed by these functions. Note that addremove is a little different and prints absolute (aka repo-relative) paths if no argument was given. Differential Revision: https://phab.mercurial-scm.org/D5900

subrepo: use relative path for "already tracked" message From 932de135041f (subrepo: warn when adding already tracked files in gitsubrepo, 2015-02-27): The file is printed with abs() to be consistent with how it is printed in workingctx, even though that is inconsistent with how added files are printed in verbose mode. However, a few year later, the same author wrote 7008f6819002 (context: name files relative to cwd in warning messages, 2017-07-11) and now it's inconsistent. This fixes that inconsistency. Differential Revision: https://phab.mercurial-scm.org/D5899

diff: make `hg diff --root=subrepo` work The root prefix is currently stripped before adding the subrepo prefix. It seems to me that if you run `hg diff --root=subrepo` and a subrepo/ path is visited (say "subrepo/foo"), then the path generated for the diff would initially be just "foo" and we then fail (if the developer warning is active) to strip the "subrepo/" from the path. It seems like we should first add the prefix in order to produce a path that's relative to the top-level repo, and then we can remove the root prefix from that. There are no tests for this, it seems, and I don't care enough to add one. Differential Revision: https://phab.mercurial-scm.org/D5895

patch: replace "prefix" and "relroot" arguments by "pathfn" (API) The two arguments serve a very similar purpose: "relroot" is stripped from the front of the path, and then "prefix" (a subrepo path) is added (also to the front). Passing in a function that does that is more generic and will make it easier to respect ui.relative-paths in later patches (don't worry, I'm not going to respect that option for regular patches, only for --stat). I'm deliberately not calling it "uipathfn", because it's generally for producing valid diffs (including when prefix is non-empty), so things like using backslash on Windows is not an option. Differential Revision: https://phab.mercurial-scm.org/D5894

test: use `printenv.py --line` in `test-static-http.t` This makes the output easier to update and read.

test: use `printenv.py --line` in `test-ssh.t` This makes the output easier to update and read.

test: use `printenv.py --line` in `test-ssh-bundle1.t` This makes the output easier to update and read.

test: use `printenv.py --line` in `test-push-http.t` This makes the output easier to update and read.

test: use `printenv.py --line` in `test-https.t` This makes the output easier to update and read.

test: use `printenv.py --line` in `test-http-bundle1.t` This makes the output easier to update and read.

test: use `printenv.py --line` in `test-hook.t` This makes the output easier to update and read.

test: use `printenv.py --line` in `test-bundle2-multiple-changegroups.t` This makes the output easier to update and read.

test: use `printenv.py --line` in `test-bundle.t` This makes the output easier to update and read.

debugignore: respect ui.relative-paths Not because I care about this, but I want to get rid of match.uipath() and it's easier to respect the config than not. Differential Revision: https://phab.mercurial-scm.org/D5898

annotate: respect ui.relative-paths for "binary file" message Differential Revision: https://phab.mercurial-scm.org/D5917

remotefilelog: replace matchandpats() by match() It doesn't seem like replacing "pats" was useful here. Replacing ("",) by [] doesn't seem like it would make a difference and glob-expansion only happens on Windows. It seem like we should just pass the patterns on to orig() unmodified. Differential Revision: https://phab.mercurial-scm.org/D5920

blackbox: test that track=* works to log everything Differential Revision: https://phab.mercurial-scm.org/D5784

blackbox: test that unsetting track disables blackbox logging Differential Revision: https://phab.mercurial-scm.org/D5783

subrepo: adjust subrepo prefix before calling subrepo.archive() (API) Differential Revision: https://phab.mercurial-scm.org/D5887

subrepo: adjust subrepo prefix before calling subrepo.diff() (API) Differential Revision: https://phab.mercurial-scm.org/D5886

subrepo: adjust subrepo prefix before calling subrepo.addremove() (API) Differential Revision: https://phab.mercurial-scm.org/D5885

subrepo: adjust subrepo prefix before calling subrepo.add() (API) Differential Revision: https://phab.mercurial-scm.org/D5884

subrepo: adjust subrepo prefix before calling subrepo.forget() (API) Differential Revision: https://phab.mercurial-scm.org/D5883

subrepo: adjust subrepo prefix before calling subrepo.removefiles() (API) That's what we do with the matcher so it seems more consistent. Differential Revision: https://phab.mercurial-scm.org/D5882

subrepo: avoid calculating subrepo prefix twice for cat() (API) Differential Revision: https://phab.mercurial-scm.org/D5881

py3: make sure __repr__ returns str No test fails but I found it while debugging test-commit-interactive-curses.t failure. # skip-blame because just r'' prefix Differential Revision: https://phab.mercurial-scm.org/D5878

py3: use bytes.startswith() instead of comparing with bytes[0] This is because bytes[0] will return the ascii value and comparison will fail. This makes test-commit-interactive-curses.t pass on Python 3. Differential Revision: https://phab.mercurial-scm.org/D5879

match: remove unused "exact" argument (API) It seems that all callers use match.exact() instead of match.match(exact=True). Differential Revision: https://phab.mercurial-scm.org/D5919

tests: replace match.match(exact=True) by match.exact() Differential Revision: https://phab.mercurial-scm.org/D5918

patch: accept second matcher that applies only to copy sources (API) See previous patch for motivation. Differential Revision: https://phab.mercurial-scm.org/D5893

patch: let caller pass in root-filtering matcher (API) The --root option to `hg diff` does two things: * Shows paths relative to the given root * Filters paths by the given root, including copy sources The root argument is passed through down to patch.diff(). I feel like we can make patch.diff() more generic by not passing down the root argument, but instead pass: * A function for taking a repo-relative path and printing it. I want to reuse this for showing cwd-relative paths later. This is the actual motivation for this patch. * A matcher that's already been filtered by the root argument * A second matcher that filters the copy sources This is one step towards that. Differential Revision: https://phab.mercurial-scm.org/D5892

patch: pass in context objects into diffhunks() (API) It's a pretty low-level function and having the contexts in patch.diff() makes future patches easier. Differential Revision: https://phab.mercurial-scm.org/D5891

convert: handle exec bit removal while converting to svn Subversion `putcommit` method checks original file's executablity to decide if executable property should be removed from svn. It is checked right after writing file contents. Content writing is implemented using `vfs.write` and vfs seems to remove exec bit, at least in some cases. This leads to executability checks being ineffective. If cset contains only this ignored exec bit removal, conversion stops with an error, because it fails to to compose svn commit properly. This fix moves exec bit checking so that it's performed before dumping file contents. Added test to check executable bit removal.

convert: handle empty intial commits while converting to svn Svn commit generation code skips empty commits, returning the parent. Skipping the root commit must return None instead. Added test to check skipping of empty commits.

branchmap: encapsulate cache updating in the map itself Rather than have a repository update the cache, move handling of cache updates into the branchmap module, in the form of a custom mapping class. This makes later performance improvements easier to handle too. Differential Revision: https://phab.mercurial-scm.org/D5638

context: replace repeated "self._repo.dirstate" by "ds" variable Differential Revision: https://phab.mercurial-scm.org/D5889

context: delete unused undelete() Maybe it's been unused since c8e2a5ea7062 (mq: avoid data loss upon qfold + qmv (issue3058), 2011-10-20), maybe not. Differential Revision: https://phab.mercurial-scm.org/D5888

diffordiffstat: avoid looking up contexts twice I'm not worried about performance; this is just simpler. Differential Revision: https://phab.mercurial-scm.org/D5890

fsmonitor: rename new verbose config knob The config knob was introduced in this release cycle under the old extension name, rename it before it is part of a release. Differential Revision: https://phab.mercurial-scm.org/D5880

tests: stabilize test-extdiff.t on Windows The test harness only wanted to drop the (windows !) lines, which also means the actual output matched the (no-windows !) lines. So drop those annotations too. I suspect if the output of the affected tests was actually collected on Windows, things were quoted because TEMPDIR contained a `~` in MSYS. Typically that happens when the username is 9 (8?) or more characters. I explicitly set TEMP and TMP to something short like "C:\temp" to avoid this, because otherwise there are a bunch of failures like this in other tests.

lfs: disable all authentication except Basic for HTTP(S) connections I ran into a problem pushing to an old Apache server- the normal outgoing traffic occurred, the Batch API request and response occurred, and then things suddenly halted. 5 minutes later, a 500 was returned, and the server log had a timeout reading 32K from `self._req.bodyfh` in hgweb.request.sendresponse(). Watching in WireShark, the Batch API got a 401, retried properly, then proceeded to PUT the blob (without authentication headers). This got a 401, but the client never retried with authentication. Worse, the blob was sent over the wire in the failed attempt. This kills digests for both the Batch API and the Transfer API. While in theory we could have the Batch API provide external URLs to a place that supports Basic Authentication, the LFS spec actually calls out using Basic Authentication[1]. It's not clear to me if they've been able to shoehorn in other methods. But let's keep it simple until somebody needs it. If we only had to support python2, we could just not add the handler for digest authentication. However in python3, AbstractBasicAuthHandler raises ValueError if it sees a scheme other than Basic. So we need to intercept all other schemes before it gets to that point. # no-check-commit because of urllib2.OpenerDirector foo_bar calling conventions [1] https://github.com/git-lfs/git-lfs/blob/master/docs/api/authentication.md

locate: respect ui.relative-paths Differential Revision: https://phab.mercurial-scm.org/D5875

revert: respect ui.relative-paths Differential Revision: https://phab.mercurial-scm.org/D5874

scmutil: delete now-unused origpath() (API) It has been replaced by backuppath(). Differential Revision: https://phab.mercurial-scm.org/D5860

subrepo: migrate to scmutil.backuppath() This has a test impact. It seems to me to be for the better. Differential Revision: https://phab.mercurial-scm.org/D5859

resolve: migrate to scmutil.backuppath() Differential Revision: https://phab.mercurial-scm.org/D5858

merge: migrate to scmutil.backuppath() Differential Revision: https://phab.mercurial-scm.org/D5857

filemerge: migrate to scmutil.backuppath() Differential Revision: https://phab.mercurial-scm.org/D5856

mq: migrate to scmutil.backuppath() Differential Revision: https://phab.mercurial-scm.org/D5855

largefiles: migrate to scmutil.backuppath() It seems unnecessary to convert the paths here back to repo-relative paths, but I'll leave that for someone else to clean up. Differential Revision: https://phab.mercurial-scm.org/D5854

revert: migrate to scmutil.backuppath() Differential Revision: https://phab.mercurial-scm.org/D5853

shelve: fix broken backup of conflicting untracked file Differential Revision: https://phab.mercurial-scm.org/D5852

scmutil: introduce a new backuppath() to replace origpath() Unlike most functions in our codebase, origpath() takes a path that is relative to cwd. This commit introduces a replacement for origpath(). The new function takes a path that is relative to the repo root. There is a lot of duplication between the two, but I intend to remove origpath() within the next few commits, so it won't be a maintenance burden. origpath() is also a little weird in that it returns either a a cwd-relative path or an absolute path. It needs to be able to return a path outside the repo, so it makes sense that it can return an absolute path. However, it would be simpler to always return an absolute path. The new function does that. Differential Revision: https://phab.mercurial-scm.org/D5851

tests: demonstrate broken unshelve when backing up untracked file Differential Revision: https://phab.mercurial-scm.org/D5850

subrepo: always show relative path to .orig backup Same as previous commit, but for subrepo. Differential Revision: https://phab.mercurial-scm.org/D5873

mq: always show relative path to .orig backup Same as previous commit, but for mq (I would have folded them, but test-check-commit doesn't like "revert/mq" as a topic and I couldn't think of a better one). Differential Revision: https://phab.mercurial-scm.org/D5872

revert: always show relative path to .orig backup This helps make some future patches easier when I replace origpath() by another function that works with repo-relative paths (origpath() works with cwd-relative paths). Always showing a relative path seems a little more user-friendly and is more consistent between configured ui.origbackuppath and not. OTOH, it's annoying if ui.origbackuppath is far outside the repo. This is just --verbose output, so I don't think it's worth spending much time on (I've already wasted too many hours on it). Differential Revision: https://phab.mercurial-scm.org/D5871

py3: ensure the HTTP password manager returns strings, not bytes The digest handler calls into the password manager on its own, and it apparently expects strings. Perhaps the Basic authentication handler didn't hit this because of its manual password fetch and format in retry_http_basic_auth(). The `pycompat.bytesurl()` on the user and password just above the first url.py diff seems unnecessary, because the password proxy in ui is converting to bytes IIUC.

tests: enable HTTP digest testing I suppose we could spin the client side extension off to a *.py file if it gets more use. I was basically just looking to avoid killing the server and relaunching it just to change authentication schemes, because that doesn't always work on Windows. The test changes capture the problem with py3.

wsgiheaders: make sure __repr__() returns a string When printing `req.headers` on the server side to debug, it complained that '%b' needed to take a string, not bytes. Changing '%s' to '%r' caused it to complain that __repr__ didn't return a string.

tests: add code to handle HTTP digests on the server side It's not hooked up yet. Mostly this was cargoculted and simplified from some python.org code[1]. It's not trying to test the security as much as it is trying to make sure that clients are sending out the right data when challenged. (And they aren't on py3.) [1] http://svn.python.org/projects/sandbox/trunk/digestauth/digestauth.py

run-tests: allow spaces in the --view tool Most tools on Windows are in Program Files, and not necessarily on PATH.

tests: extract the http server authentication extension to a single module We had 4 copy/pastes of this, and no coverage for http digests (which are currently broken on py3).

extdiff: support tools that can be run simultaneously

largefiles: use wrappedfunction() in overriderevert() Differential Revision: https://phab.mercurial-scm.org/D5869

largefiles: use wrappedfunction() for "normal files match" in overridecopy() Differential Revision: https://phab.mercurial-scm.org/D5868

largefiles: use wrappedfunction() for match() override in overridecopy() This reduced the time that the override is in place, but I that it's correct this way (only for the duration of the orig() call). Differential Revision: https://phab.mercurial-scm.org/D5867

largefiles: use wrappedfunction() for util.copyfile() override Differential Revision: https://phab.mercurial-scm.org/D5866

largefiles: use wrappedfunction() for matchandpats() override in overridelog() Differential Revision: https://phab.mercurial-scm.org/D5865

status: if ui.relative-paths=no, don't use relative paths even with patterns Without ui.relative-paths or command.status.relative set, you get this behavior: hgext$ hg st M hgext/narrow/narrowrepo.py hgext$ hg st . M narrow/narrowrepo.py hgext$ hg st narrow M narrow/narrowrepo.py I think it's surprising that some of those produce relative paths. I suspect it works that way because "hg st ." was an easy way of getting relative paths. Perhaps not much thought was given to how it should behave when the pattern was not ".". It also feels wrong to conflate the request for relative patterns with matching of of patterns. Since we can now start fresh and define the behavior of ui.relative-paths as we want, I suggest we make ui.relative-paths=no consistently not give relative paths. So that's what this paths starts doing for `hg status`. Differential Revision: https://phab.mercurial-scm.org/D5802

files: respect ui.relative-paths Differential Revision: https://phab.mercurial-scm.org/D5801

config: introduce a new value for ui.relative-paths getting old behavior The few places I've modified so far to respect ui.relative-paths have traditionally defaulted showing the path from the repo root. However, some commands (at least `hg files`) default to showing paths relative to the cwd. Let's allow a special value for ui.relative-paths to preserve the old behavior, so we can use that as default value for it. I don't expect that anyone would want to set this value, so perhaps we could have relied on it being unset, but I don't really like behaviors that can only be achieved by a unset config option. Differential Revision: https://phab.mercurial-scm.org/D5800

py3: use pycompat.bytestr() on extra values because it can be int One such example is {'close': 1} which marks a branch as closed. This makes test-convert-mtn.t pass on Python 3. Differential Revision: https://phab.mercurial-scm.org/D5864

py3: add some b'' prefixes in hgext/convert/monotone.py # skip-blame because just b'' prefixes Differential Revision: https://phab.mercurial-scm.org/D5863

py3: use '%d' for integers instead of '%s' I think this is the last of these occurences because I have got the test passing on python3 in a later patch. Differential Revision: https://phab.mercurial-scm.org/D5862

py3: add 1 new passing test found by buildbot This will make py3 buildbot green again. Differential Revision: https://phab.mercurial-scm.org/D5861

merge: don't unnecessarily calculate absolute path I think this also makes the code clearer (and prepares for a later patch that replaces origpath()). Differential Revision: https://phab.mercurial-scm.org/D5849

merge: don't unnecessarily calculate backup path Differential Revision: https://phab.mercurial-scm.org/D5848

largefiles: drop "rel" prefix from filename variables The prefixes were meant to indicate that these paths are repo-relative as opposed to absolute. However, that's what the majority of paths in our code base are, so "rel" made me think they were instead cwd-relative. Let's just drop the prefixes. Differential Revision: https://phab.mercurial-scm.org/D5847

branchmap: add some clarifications and clean up flow - Remove indentation where it is not needed. - Swap the subset test branches to follow along logically and put the 'empty' case last. Differential Revision: https://phab.mercurial-scm.org/D5637

branchmap: updating triggers a write Rather than separate updating and writing, create a subclass that doesn't write on update. This minimises chances we forget to write out updates somewhere. This also makes refactoring and improving the branchmap functionality easier. Differential Revision: https://phab.mercurial-scm.org/D5636

branchmap: make branchcache responsible for reading Encapsulate reading in a classmethod, to make it clear what kind of object is being handled. This is part of a stack of refactoring changes to help performance improvements down the line. Differential Revision: https://phab.mercurial-scm.org/D5635

attr: make some docstrings raw strings This avoids a SyntaxWarning in Python 3.8 due to invalid \ escapes. Differential Revision: https://phab.mercurial-scm.org/D5817

revset: leverage getintrange() helper in relation-subscript operation (API) Now a range expression is parsed by a relation function itself since the upper layer have no knowledge about the default first/last bounds.

revset: allow to parse single integer as a range Even though this wouldn't be any useful in followlines(), it helps to unify range processing.

revset: extract a helper to parse integer range It's getting common. As a first step, this patch adds getintrange() and makes followlines() use it. I wanted to unify the error messages to make the function interface simple, but I failed to phrase it briefly.

commit: if interactive, look elsewhere for whitespace settings (BC) Previously, when doing `commit -i`, we respected `diff.ignorews` and other whitespace-related settings, which is probably unexpected. The primary reason for this is to support hgext.record's commandline options, it's probably accidental that the `[diff]` settings were also considered. See comments on issue6042 and D5490. This can cause problems (issue5839, issue6042). It is assumed by the author that the `[diff]` section is primarily for *viewing* diffs, and that it is unlikely what people intend when attempting to commit or revert. With this change, if a user wants the behavior, they can clone their `[diff]` settings to `commands.commit.interactive.<setting>`. This is thus a mild BC change, but one I suspect is not going to be relied on by anyone. Note: while doing a partial commit/revert, we do not know what command the user is actually running. This means that the split extension, which ends up calling into this code, will respect the `commands.commit.interactive.<setting>` settings, and not a hypothetical `commands.split.interactive.<setting>`. This *also* means that setting `commands.commit.interactive.ignoreblanklines`, for example, will still cause issue5839. Considering the highly unlikely chance that a user actually sets `commands.commit.interactive.<setting>`, the author deems this risk acceptable. Differential Revision: https://phab.mercurial-scm.org/D5834

diff: when looking for diff configs, support a configurable prefix In a future commit, I want to make it possible to have the diff options pulled from (as an example) `commands.commit.interactive.ignorews`; previously we only supported this for customizable sections (so this would have needed a `commit-interactive` section and been named `commit-interactive.ignorews`, which felt a bit weird. Differential Revision: https://phab.mercurial-scm.org/D5833

config: extract diff-related coreconfigitem()s to a helper method We already have 'annotate' and 'diff' that use the same set of options, and I want to add more in a followup commit, so I'm attempting to reduce maintenance burden and duplication by making it possible to register all of them at once. Differential Revision: https://phab.mercurial-scm.org/D5832

commit: ignore diff whitespace settings when doing `commit -i` (issue5839) Previously, we respected options like `diff.ignoreblanklines` and `diff.ignorews`. This can cause problems when the user is attempting to actually commit the blank line change. Specifically, the split extension can get into an infinite loop because it detects that the working copy is not clean, but when we get the diff we don't see the changes, so it just skips popping up the chunk selection flow, saying there's no changes to record. These options are primarily meant for viewing diffs; it is highly unlikely that someone is actually intending to add extraneous whitespace and have it ignored if they attempt to interactively commit (but *not* ignored if they non-interactively commit). Differential Revision: https://phab.mercurial-scm.org/D5744

tests: add syntax warnings on Python 3.8 in python-zstandard These are warnings from upstream test code. Let's just acknowledge them for now. These should go away in a future python-zstandard release :) Differential Revision: https://phab.mercurial-scm.org/D5846

check-py3-compat: manually format and print warnings The warnings mechanism may print to stderr on Python 3. Independent buffering of stdout and stderr can lead to warnings output not being printed properly. This commit traps warnings when executing individual files and prints warnings to stdout so output is deterministic. Differential Revision: https://phab.mercurial-scm.org/D5845

check-py3-compat: provide filename to ast.parse() This ensures any warning/error messages print a valid filename instead of potentially '<unknown>'. Differential Revision: https://phab.mercurial-scm.org/D5844

doc: escape backslash This avoids a SyntaxWarning on Python 3.8 due to invalid \ escape. Differential Revision: https://phab.mercurial-scm.org/D5843

testparseutil: escape backslash in docstring This is funky. This inline Python code is part of a docstring, which means the string is interpreted first. So any backslashes need double escaping. So even though this is already a br'', we still need to escape. Differential Revision: https://phab.mercurial-scm.org/D5842

tests: use raw strings in test-help.t This avoids SyntaxWarning on Python 3.8 due to invalid \ escapes. Differential Revision: https://phab.mercurial-scm.org/D5841

tests: escape backslash in makepatch.py inline file This avoids some SyntaxWarning on Python 3.8 due to unescaped \. Differential Revision: https://phab.mercurial-scm.org/D5840