rebase: do not crash rebasing merge with a parent having hidden successor The added test will crash with previous code. Differential Revision: https://phab.mercurial-scm.org/D640

changegroup: fix to allow empty manifest parts The current chunk reading algorithm relied on counting the number of empty chunks and comparing it to the number of chunk lists it expected (1 list of files for cg1 and cg2, and 1 list of files + 1 list of trees for cg3). This implicitly assumed that both the changelog part and the manifestlog part were never empty (since them being empty would cause it to count it as one list being done, and screw up the count). In our treemanifest code, the manifest section could be empty, so we need to handle that case. This patches refactors that code to be more explicit about how it counts the expected parts. Differential Revision: https://phab.mercurial-scm.org/D646

mq: create non-lossy patches, also with custom global diff configuration Users with custom [diff] configuration most certainly didn't intend it to make mq lose changes. It could: * git is handled perfectly fine. * nobinary could make mq leave some files out from the patches. * noprefix could make mq itself (and probably also other tools) fail to apply patches without the usual a/b prefix. * ignorews, ignorewsamount, or ignoreblanklines could create patches with missing whitespace that could fail to apply correctly. Thus, when refreshing patches, use patch.difffeatureopts, optionally with git as before, but without the config options for whitespace and format changing that most likely will cause loss or problems. (patch.diffopts is just patch.difffeatureopts with all options enabled and can be replaced with that.)

mq: test coverage of how [diff] configuration influence can break mq patches

wrapcommand: use functools.partial Like the previous patch, this helps remove noises in traceback. Practically, this removes another 6 lines in `rebase -s . -d .` traceback in my setup: .... File "hg/mercurial/util.py", line 1118, in check return func(*args, **kwargs) -File "hg/mercurial/extensions.py", line 331, in closure - return func(*(args + a), **kw) File "hg/mercurial/util.py", line 1118, in check return func(*args, **kwargs) File "fb-hgext/hgext3rd/fbhistedit.py", line 283, in _rebase return orig(ui, repo, **opts) File "hg/mercurial/util.py", line 1118, in check return func(*args, **kwargs) -File "hg/mercurial/extensions.py", line 331, in closure - return func(*(args + a), **kw) File "hg/mercurial/util.py", line 1118, in check return func(*args, **kwargs) File "remotenames.py", line 633, in exrebasecmd ret = orig(ui, repo, **opts) File "hg/mercurial/util.py", line 1118, in check return func(*args, **kwargs) -File "hg/mercurial/extensions.py", line 331, in closure - return func(*(args + a), **kw) File "hg/mercurial/util.py", line 1118, in check return func(*args, **kwargs) File "fb-hgext/hgext3rd/fbamend/__init__.py", line 453, in wraprebase return orig(ui, repo, **opts) File "hg/mercurial/util.py", line 1118, in check return func(*args, **kwargs) .... Differential Revision: https://phab.mercurial-scm.org/D633

wrapfunction: use functools.partial if possible Every `extensions.bind` call inserts a frame in traceback: ... in closure return func(*(args + a), **kw) which makes traceback noisy. The Python stdlib has a `functools.partial` which is backed by C code and does not pollute traceback. However it does not support instancemethod and sets `args` attribute which could be problematic for alias handling. This patch makes `wrapfunction` use `functools.partial` if we are wrapping a function directly exported by a module (so it's impossible to be a class or instance method), and special handles `wrapfunction` results so alias handling code could handle `args` just fine. As an example, `hg rebase -s . -d . --traceback` got 6 lines removed in my setup: File "hg/mercurial/dispatch.py", line 898, in _dispatch cmdpats, cmdoptions) -File "hg/mercurial/extensions.py", line 333, in closure - return func(*(args + a), **kw) File "hg/hgext/journal.py", line 84, in runcommand return orig(lui, repo, cmd, fullargs, *args) -File "hg/mercurial/extensions.py", line 333, in closure - return func(*(args + a), **kw) File "fb-hgext/hgext3rd/fbamend/hiddenoverride.py", line 119, in runcommand result = orig(lui, repo, cmd, fullargs, *args) File "hg/mercurial/dispatch.py", line 660, in runcommand ret = _runcommand(ui, options, cmd, d) -File "hg/mercurial/extensions.py", line 333, in closure - return func(*(args + a), **kw) File "hg/hgext/pager.py", line 69, in pagecmd return orig(ui, options, cmd, cmdfunc) .... Differential Revision: https://phab.mercurial-scm.org/D632

cmdutil: remove redundant commitfunc parameter in amend (API) Since the redundant commit during the amend has been been removed, there is no need for commit callback function in amend now. Therefore, this commit removes the unused parameter "commmitfunc" which was being used for this purpose. Test Plan: Ensured that all the tests pass Differential Revision: https://phab.mercurial-scm.org/D635

cmdutil: remove the redundant commit during amend There was an extra commit made during the amend operation to track the changes to the working copy. However, this logic was written a long time back and newer API's make this extra commit redundant. Therefore, I am removing the extra commit. After this change, I noticed that - Execution time of the cmdutil.amend improved by over 40%. - Execution time of "hg commit --amend" improved by over 20%. Test Plan: I ensured that the all the hg tests passed after the change. I had to fix a few tests which were aware of the extra commit made during the amend. Differential Revision: https://phab.mercurial-scm.org/D636

checknlink: rename file object from 'fd' to 'fp' Make it clear that `fp` (`file` object) is different from `fd` (low-level file descriptor number). Differential Revision: https://phab.mercurial-scm.org/D642

cleanup: rename "matchfn" to "match" where obviously a matcher We usually call matchers either "match" or "m" and reserve "matchfn" for functions. Differential Revision: https://phab.mercurial-scm.org/D641

check-code: fix incorrect capitalization in camelcase regex This was found internally at Google as part of a monorepo-wide cleanup. Differential Revision: https://phab.mercurial-scm.org/D637

amend: use context manager for config override Differential Revision: https://phab.mercurial-scm.org/D639

amend: delete dead assignment to "newid" Differential Revision: https://phab.mercurial-scm.org/D638

checknlink: use a random temp file name for checking Previously, if `.hg/store/00manifest.d.hgtmp1` exists, hg will copy the entire `00manifest.d` every time when appending new manifest revisions. That could happen if Mercurial or the machine crashed when `.hgtmp1` was just created but not deleted yet. This patch changes the fixed name to a random generated name. To be consistent with D468, `~` suffix was used. Differential Revision: https://phab.mercurial-scm.org/D611

copytrace: move the default copytracing algorithm in a new function We are going to introduce a new fast heuristic based copytracing algorithm, so lets make mergecopies the function which decides which algorithm to go with and then calls the related function. While I was here, I add a line in test-copy-move-merge.t saying its a test related to the full copytracing algorithm. Differential Revision: https://phab.mercurial-scm.org/D622

copytrace: replace experimental.disablecopytrace config with copytrace (BC) This patch replaces experimental.disablecopytrace with experimental.copytrace. Since the words does not means the same, the default value is also changed. Now experimental.copytrace defaults to 'on'. The new value is not boolean value as we will be now having two different algorithms (current one and heuristics one to be imported from fbext) so we need this to be have more options than booleans. The old config option is not kept is completely replaced as that was under experimental and we don't gurantee BC to experimental things. .. bc:: The config option for copytrace `experimental.disablecopytrace` is now replaced with `experimental.copytrace` which defaults to `on`. If you need to turn off copytracing, add `[experimental] copytrace = off` to your config. Differential Revision: https://phab.mercurial-scm.org/D621

filemerge: use fctx.write() in the internal:dump tool, instead of copy This is slower but allows this tool to work with the "deferred writes" milestone of in-memory merge. The performance hit is not too noticiable since this only used for the :dump merge tool during a conflict. Differential Revision: https://phab.mercurial-scm.org/D617

largefiles: remove unused assignments from wrapfunction() The return values from wrapfunction() were never used here. Using the value is also a little tricky and wrappedfunction() should be preferred, so let's just delete the assignments. There's also a bunch of return values from wrapcommand() being assigned to a variable here, but at least that value can be (and is used after some of the assignments). Differential Revision: https://phab.mercurial-scm.org/D618

branches: correctly show inactive multiheaded branches Issue being fixed here: `hg branches` incorrectly renders inactive multiheaded branches as active if they have closed heads. Example: ``` $ hg log --template '{rev}:{node|short} "{desc}" ({branch}) [parents: {parents}]\n' 4:2e2fa7af8357 "merge" (default) [parents: 0:c94e548c8c7d 3:7be622ae5832 ] 3:7be622ae5832 "2" (somebranch) [parents: 1:81c1d9458987 ] 2:be82cf30409c "close" (somebranch) [parents: ] 1:81c1d9458987 "1" (somebranch) [parents: ] 0:c94e548c8c7d "initial" (default) [parents: ] $ hg branches default 4:2e2fa7af8357 somebranch 3:7be622ae5832 ``` Branch `somebranch` have two heads, the 1st one being closed (rev 2) and the other one being merged into default (rev 3). This branch should be shown as inactive one. This happens because we intersect branch heads with repo heads to check branch activity. In this case intersection in a set with one node (rev 2). This head is closed but the branch is marked as active nevertheless. Fix is to check branch activity by intersecting only open heads set. Fixed output: ``` $ hg branches default 4:2e2fa7af8357 somebranch 3:7be622ae5832 (inactive) ``` Relevant tests for multihead branches added to test-branches suite. Implentation note about adding `iteropen` method: At first I have tried to modify `iterbranches` is such a way that it would filter out closed heads itself. For example it could have `closed=False` parameter. But in this case we would have to filter closed tips as well. Reasoning in terms of `hg branches` we actually are not allowed to do this. Also, we need to do heads filtering only if tip is not closed itself. But if it is - we are ok to skip filtering, because branch is already known to be inactive. So we can't implement heads filtering in `iterbranches` in elegant way, because we will end up with something like `closed_heads=False` or even `closed_heads_is_tip_is_open`. Finally I decided to move this logic to the `branches` function, adding `iteropen` helper method. Differential Revision: https://phab.mercurial-scm.org/D583

parser: stabilize output of prettyformat() by using byte-safe repr() The format of leaf nodes is slightly changed so they look more similar to internal nodes.

py3: fix repr(util.url) to return system string This is required on Python 3.

py3: use bytes[n:n + 1] to get bytes in templater._parsetemplate()

py3: fix type of attribute name in smartset.py

py3: fix mixed bytes/unicode in revsetlang._aliassyminitletters

py3: fix type of regex literals in subrepo.py

py3: replace bytes[n] with bytes[n:n + 1] in patch.py where needed

py3: fix type of regex literals in patch.py

revset: optimize "draft() & ::x" pattern The `draft() & ::x` type query could be common for selecting one or more draft feature branches being worked on. Before this patch, `::x` may travel through the changelog DAG for a long distance until it gets a smaller revision number than `min(draft())`. It could be very slow on long changelog with distant (in terms of revision numbers) drafts. This patch adds a fast path for this situation, and will stop traveling the changelog DAG once `::x` hits a non-draft revision. The fast path also works for `secret()` and `not public()`. To measure the performance difference, I used drawdag to create a repo that emulates distant drafts: DRAFT4 | DRAFT3 # draft / PUBLIC9999 # public | PUBLIC9998 | . DRAFT2 . | . DRAFT1 # draft | / PUBLIC0001 # public And measured the performance using the repo: (BEFORE) $ hg perfrevset 'draft() & ::(DRAFT2+DRAFT4)' ! wall 0.017132 comb 0.010000 user 0.010000 sys 0.000000 (best of 156) $ hg perfrevset 'draft() & ::(all())' ! wall 0.024221 comb 0.030000 user 0.030000 sys 0.000000 (best of 113) (AFTER) $ hg perfrevset 'draft() & ::(DRAFT2+DRAFT4)' ! wall 0.000243 comb 0.000000 user 0.000000 sys 0.000000 (best of 9303) $ hg perfrevset 'draft() & ::(all())' ! wall 0.004319 comb 0.000000 user 0.000000 sys 0.000000 (best of 655) Differential Revision: https://phab.mercurial-scm.org/D441

phabricator: add a config to use curl for communication Not sure why, but I got `phabsend` hang on work network pretty frequently. The traceback indicates it hangs at `_sslobj.do_handshake()`: File "mercurial/sslutil.py", line 404, in wrapsocket sslsocket = sslcontext.wrap_socket(sock, server_hostname=serverhostname) File "/usr/lib/python2.7/ssl.py", line 363, in wrap_socket _context=self) File "/usr/lib/python2.7/ssl.py", line 611, in __init__ self.do_handshake() File "/usr/lib/python2.7/ssl.py", line 840, in do_handshake self._sslobj.do_handshake() I had tried adding `timeout` in various places but they seem not effective. It seems easier to just allow shelling out to `curl` with retry and timeout flags. This could also be helpful for people with an older Python installed without modern security (SNI). Differential Revision: https://phab.mercurial-scm.org/D605

phabricator: standardize colors Previously, the `--confirm` text could have colors but the main `phabsend` does not. This patch adjusts the main command so it also has colors. A default color table was added so the colors are visible by default. Differential Revision: https://phab.mercurial-scm.org/D515

wireproto: do not abort after successful lookup As far as I can tell, this interface originally used 'return' here, so the "fallthrough" to self._abort made sense. When it was switched to 'yield' this didn't make sense, but doesn't impact most uses because the 'plain' wrapper in peer.py's 'batchable' decorator only attempts to yield two items (args and value). When using iterbatch, however, it attempts to verify that the @batchable generators only emit 2 results, by expecting a StopIteration when attempting to access a third. Differential Revision: https://phab.mercurial-scm.org/D608

check-code: forbid "\S" in egrep regular expression BSD `egrep` does not like it. So let's forbid it. Differential Revision: https://phab.mercurial-scm.org/D610

check-code: forbid using bash in shebang Some platforms (ex. FreeBSD) do not have `bash` by default. Therefore it should not be used in test scripts. Differential Revision: https://phab.mercurial-scm.org/D609

amend: add tests for amending only some files from commit to be amended We do not have robust enough tests for scenarios where only some files in a changeset are amended. This presents an interesting scenario because the working copy could have modified versions of the remaining files in the pre-amend changeset. Therefore, I have added some tests to ensure that amend behaves as expected in these scenarios. Test Plan: Ensured that the test "test-commit-amend.t" passes. Differential Revision: https://phab.mercurial-scm.org/D596

test-editor-filename: fix portability of fake editor command - /bin/bash doesn't exist on FreeBSD - edit is executed by cmd.exe on Windows

amend: moving first assignment of newid closer to its use newid was needlessly further away from where its intended to be used leading to bad readability. This commit moves it to address the same. The end goal is to remove the redundant commit in the amend code path and this commit takes care of cleaning up some unrelated code before that change. Test Plan: ran the test suite Differential Revision: https://phab.mercurial-scm.org/D597

amend: rectify comment Comment was ambiguous as there can be two parents of a changeset in mercurial. This commit fixes the comment to clarify that the first parent is being considered. Test Plan: ran the test suite Differential Revision: https://phab.mercurial-scm.org/D595

amend: removing redundant if condition There is needless checking for the new commit hash not being equal to the old commit hash. This condition will always be true at this point in the code path and thus, can be removed safely. This commit removes the redundant condition. Test Plan: ran the test suite. Differential Revision: https://phab.mercurial-scm.org/D594

editor: file created for diff action should have .diff suffix This is a follow-up to https://phab.mercurial-scm.org/D464 (6e6452bc441d) that introduced the new file extension behavior. It erroneously changed `.diff` to `.diff.hg.txt`. Test Plan: Verified `make tests` passes, particularly `test-editor-filename.t`. Differential Revision: https://phab.mercurial-scm.org/D607

test-amend: match output using conditional test case name D466 (6cc8f848b4c3) allows output to be conditionally matched by test name. This patch changes test-amend.t to use that feature, instead of duplicating `hg amend` command or use `-q` to silence its output. Differential Revision: https://phab.mercurial-scm.org/D601

util: use set for reserved Windows filenames Previously, we were performing membership testing against a list. Change it to a set for a minor perf win. While we're at it, explode the assignment in place so less work is needed at module import time. Differential Revision: https://phab.mercurial-scm.org/D600

context: add arbitraryfilectx, which can represent files outside the workdir Move it from contrib/simplemerge so it can be re-used in the future. Differential Revision: https://phab.mercurial-scm.org/D604

simplemerge: remove unused `filtereddata` parameter Differential Revision: https://phab.mercurial-scm.org/D603

simplemerge: remove unused `repo` parameter This is now no longer used or needed thanks to the `decodeddata()` context function. Differential Revision: https://phab.mercurial-scm.org/D602

extensions: prohibit unicode defaults If the default value of an option is a unicode string (something than happen easily when using a 'from __future__ import unicode_literals'), any value passed on the command line will be ignored because the fancyopts module only checks for byte strings and not unicode strings. Changing fancyopts behavior is easy but would make assumptions on how the python3 port should be done, which is outside the scope of this patch. The chosen approach is to stop an extension from being loaded when a unicode default value is detected, with a hint for the developer.

revsetlang: remove unused functions Superseded by the _match() function.

revsetlang: match tree by helper function on optimize This should make optimize() more readable and less error-prone, but it doubles the parsing cost. (original) $ python -m timeit -n10000 -s 'from mercurial import revsetlang as L' \ 'L.optimize(L.analyze(L.parse("ancestors(x) and not ancestors(y)")))' 10000 loops, best of 3: 79.3 usec per loop (this patch) $ python -m timeit -n10000 -s 'from mercurial import revsetlang as L' \ 'L._treecache.clear(); \ L.optimize(L.analyze(L.parse("ancestors(x) and not ancestors(y)")))' 10000 loops, best of 3: 201 usec per loop

parser: add helper function to test if pattern matches parsed tree This function will be used as follows: match('ancestors(_) and not ancestors(_)', x) See the next patch for details.

revsetlang: build optimized tree by helper function This should make optimize() more readable, but it doubles the parsing cost. (original) $ python -m timeit -n10000 -s 'from mercurial import revsetlang as L' \ 'L.optimize(L.analyze(L.parse("::tip")))' 10000 loops, best of 3: 18.1 usec per loop (this patch) $ python -m timeit -n10000 -s 'from mercurial import revsetlang as L' \ 'L._treecache.clear(); L.optimize(L.analyze(L.parse("::tip")))' 10000 loops, best of 3: 48.4 usec per loop 30usec isn't dominant compared to the revset evaluation, but that is a cost. That's why a parsed tree is cached, which can benefit in hgweb or chg server.

parser: add helper function that constructs parsed tree from template This function will be used as follows: build('only(_, _)', x, y) See the next patch for details.

patch: take messages out of the function so that extensions can add entries Extensions will want to have interactive thing for more operations or particulary want to show more verbs. So this patch takes out the message thing from the function so that extensions can add verbs to this. The curses one is also not in any function so extensions can add more actions and verbs there. Differential Revision: https://phab.mercurial-scm.org/D567

run-tests: allow bisecting a different repo Add `--bisect-repo` flag which accepts a different repo to bisect. 3rd party extensions may reuse `run-tests.py` from core to run tests. Test failure could be caused by either a core hg change or the 3rd party extension code itself. Having a way to specify which repo to bisect is useful. Differential Revision: https://phab.mercurial-scm.org/D578

run-tests: extract prefix of bisect commands to a variable This does not change any logic. Differential Revision: https://phab.mercurial-scm.org/D577

run-tests: pass --with-hg to run-tests.py command used by bisect This makes `run-tests.py -l test-run-tests.t` 23 seconds faster on my laptop. Inside the test, `$ rt --known-good-rev=0 test-bisect.t` took 24.9 seconds before, and 1.2 seconds after. Differential Revision: https://phab.mercurial-scm.org/D576

import-checker: allow relative import a module being checked This would make the checker more friendly for 3rd-party code. For example, In remotefilelog/x.py, it may have: from . import shallowutils That could trigger "relative import of stdlib module" if "remotefilelog" was installed in the system. If the module being checked conflicts with the system module, it makes sense to not treat that module as system module. This patch makes it so. Differential Revision: https://phab.mercurial-scm.org/D552

merge: move some of the logic in batchget() to workingfilectx We will use this logic in two places with in-memory merge. Differential Revision: https://phab.mercurial-scm.org/D444

filemerge: add _restorebackup Differential Revision: https://phab.mercurial-scm.org/D404

filemerge: reduce creation of tempfiles until needed This restricts the creation of temporary files to just `_xmerge`, when we call an external tool. Differential Revision: https://phab.mercurial-scm.org/D403

filemerge: add `_workingpath` This reduces any reliance on `a`. Differential Revision: https://phab.mercurial-scm.org/D401

filemerge: move a util copy call to filectx.write This way a future in-memory-merge context can intercept them. Differential Revision: https://phab.mercurial-scm.org/D400

filemerge: eliminate most uses of tempfiles Emphasize that they're unused so we can more easily remove them later. Differential Revision: https://phab.mercurial-scm.org/D399

filemerge: extract _maketemp and _makebackup These functions will be modified by in-memory merge, so let's extract them first and add some comments. This also shortens `_filemerge` a bit. Differential Revision: https://phab.mercurial-scm.org/D388

encoding: check overflow while calculating size of JSON escape buffer The minimum input size to exploit is ~682MB (= INT_MAX / len('\\u0000') * 2) on 32bit system, which isn't easy to achieve using Python str in 2GB process address space, but probably doable.

editor: use an unambiguous path suffix for editor files Changes the API of `ui.edit()` to take an optional `action` argument, which is used when constructing the suffix of the temp file. Previously, it was possible to set the suffix by specifying a `suffix` to the optional `extra` dict that was passed to `ui.edit()`, but the goal is to drop support for `extra.suffix` and make `action` a required argument. To this end, `ui.edit()` now yields a `develwarn()` if `action` is not set or if `extra.suffix` is set. I updated all calls to `ui.edit()` I could find in `hg-crew` to specify the appropriate `action`. This means that when creating a commit, instead of the path to the editor file being something like: `/tmp/hg-editor-XXXXXX.txt` it is now something like: `/tmp/hg-editor-XXXXXX.commit.hg.txt` Some editors (such as Atom) make it possible to statically define a [TextMate] grammar for files with a particular suffix. For example, because Git reliably uses `.git/COMMIT_EDITMSG` and `.git/MERGE_MSG` as the paths for commit-type messages, it is trivial to define a grammar that is applied when files of either name are opened in Atom: https://github.com/atom/language-git/blob/v0.19.1/grammars/git%20commit%20message.cson#L4-L5 Because Hg historically used a generic `.txt` suffix, it was much harder to disambiguate whether a file was an arbitrary text file as opposed to one created for the specific purpose of authoring an Hg commit message. This also makes it easier to add special support for `histedit`, as it has its own suffix that is distinct from a commit: `/tmp/hg-histedit-XXXXXX.histedit.hg.txt` Test Plan: Added an integration test: `test-editor-filename.t`. Manually tested: ran `hg ci --amend` for this change and saw that it used `/tmp/hg-editor-ZZjcz0.commit.hg.txt` as the path instead of `/tmp/hg-editor-ZZjcz0.txt` as the path. Verified `make tests` passes. Differential Revision: https://phab.mercurial-scm.org/D464

revlog: move check for wdir from changelog to revlog Yuya said he preferred this (to keep them in one place, I think). Differential Revision: https://phab.mercurial-scm.org/D569

debugssl: allow a URL to be specified without a local repository This was the original intent, but I bungled the logic. Otherwise if there is a certificate chain issue, the repository can't be cloned in order for there to be a repo object. I think I missed this case because I was inside of a Mercurial clone as I was originally developing and testing this.

revlog: use pycompat.bytestr() to reliably have a %s-able value

debugcommands: stabilize output of debugbundle by having a custom repr We handle all dict-like things the same, and don't worry about it actually being a repr.

python3: whitelist another 5 passing tests found with the ratchet script

python3: replace sorted(<dict>.iterkeys()) with sorted(<dict>)

python3: wrap all uses of <exception>.strerror with strtolocal Our string literals are bytes, and we mostly want to %-format a strerror into a one of those literals, so this fixes a ton of issues.

pager: do not start pager if `ui` has been `pushbuffer`-ed The `pushbuffer`, `popbuffer` APIs are intended to capture internal output. They will prevent `ui.write` from writing to the actual `ui.fout`. So a pager won't receive the output and do the right thing. In general, it does not make sense to start a pager if ui is in the "pushbuffer" mode. Differential Revision: https://phab.mercurial-scm.org/D574

revset: do not flip "and" arguments when optimizing Rewrite `flipand(y, x)` to `andsmally(x, y)` so the AST order is unchanged, which could be more friendly to developers. Differential Revision: https://phab.mercurial-scm.org/D579

revset: make match function follow given subset if specified (API) This should be sensible default since mfunc(subset) is roughly equivalent to 'subset & mfunc'. The order argument is still there so we can specify 'anyorder' if the order doesn't really matter.

revset: move order argument to run-time match function We no longer need the order flag to build a parsed tree.

revset: fix example describing how ordering is determined It was 'X & !Y' before.

revset: move order constants from revsetlang Thanks to the recent refactor, the ordering rule is fully processed at runtime.

tag: use filtered repo when creating new tags (issue5539) When pruning a changeset that added a tag and then adding another tag, the "pruned" tag gets restored. This is because the tag creation step (tags._tag() call in tags.tag()) is currently done on the unfiltered repo. This behavior has been there from 7977d35df13b which backs out b08af8f0ac01 with no clear reason but caution on unthought situations at that time. In this changeset, we pass the filtered repo to tags._tag(), preventing "pruned" tags to reappear. This somehow restores b08af8f0ac01, though now we arguably have a valid use case for.

extensions: add wrappedfunction() context manager Several extensions exist that temporarily want to wrap a function (at least narrowhg, any many of the extensions in hg-experimental). That's why we have the unwrapfunction() that was introduced in 19578bb84731 (extensions: add unwrapfunction to undo wrapfunction, 2016-08-10). This patch adds a simple wrappedfunction() that returns a context manager. Differential Revision: https://phab.mercurial-scm.org/D472

mdiff: add a --ignore-space-at-eol option Add an option that only ignores whitespaces at EOL. The name of the option is the same as Git. .. feature:: Added `--ignore-space-at-eol` diff option to ignore whitespace differences at line endings. Differential Revision: https://phab.mercurial-scm.org/D422

revset: improve documentation about ordering handling The old documentation is a bit confusing. Namely, it's unclear whether `define` means "I should ALWAYS define a new order", or "I should SOMETIMES define a new order", and if it's the latter, what's the difference between `define` and `any`? This patch clarifies that and adds more examples. Differential Revision: https://phab.mercurial-scm.org/D523

revset: remove order information from tree (API) Keeping `order` in tree makes AST operation harder. And there could be invalid cases if trees could be generated and compounded freely, like: SetA(order=define) & SetB(order=define) ^^^^^^ couldn't be satisfied This patch changes the code to calculate order on the fly, during tree traversal. Optimization of reordering `and` arguments is preserved by introducing a new internal operation `flipand`. .. api:: revset.stringset() now takes 'order' as the last argument. Differential Revision: https://phab.mercurial-scm.org/D451

revset: drop optimization about reordering "or" set elements The reordering optimization is more important for "and" than "or", given the implementation details about "addset" and "filteredset" - reordering "or" may help "__contains__" test but not iteration, reordering "and" could help both. We are going to simplify the tree to remove ordering information. Removing "or" reordering optimization would make things simpler. This effectively reverts c63cb2d10d6d. It tracks back to the "orset" function added by the initial commit of revset (c9ce8ecd6). In the future, we might consider optimization at runtime (ex. do reordering and rewrites inside "orset"). Differential Revision: https://phab.mercurial-scm.org/D561

rebase: use _ctxdesc in one more place This simplifies the code. Differential Revision: https://phab.mercurial-scm.org/D566

rebase: move working parent and bookmark for obsoleted revs (BC) Previously, obsoleted revs with successors in destination are completely ignored. That caused some inconvenience when working copy is obsoleted. Most commands avoid working copy being obsoleted, but `hg pull` is an exception. This patch makes rebase able to move bookmarks or working parent for those obsoleted revs. It does so by keeping the obsoleted revs in `state` and marking them as "skipped, rebased to desired destination" during run-time. This reverts part of the behavior change of 3b7cb3d17137 and D24. Differential Revision: https://phab.mercurial-scm.org/D527

rebase: remove an unnecessary adjustdest in clearrebased `rev` being "skipped" could currently be caused by moving `rev` does not create a new commit. In this case, `state[rev]` is already changed to `p1`, and is a sane destination for bookmark or working parent movement. Therefore an additional destination adjustment is unnecessary. Differential Revision: https://phab.mercurial-scm.org/D565

rebase: sort destmap topologically Previously rebase source and destination could not overlap. But with the multi-destination support, source and destination could reasonably partially overlap. That requires another topological sort on `{sourcerev: destrev}` graph (destmap). This patch implements that. If a revision's destination is itself, the error message gets changed from "source is ancestor of destination" to "source and destination form a cycle". Not marking as BC since automation should depend on exit code, not error message. Differential Revision: https://phab.mercurial-scm.org/D470

rebase: initial support for multiple destinations This patch defines `SRC` (a single source revision) and `ALLSRC` (all source revisions) to be valid names in `--dest` revset if `--src` or `--rev` is used. So destination could be defined differently according to source revisions. The names are capitalized to make it clear they are "dynamically defined", distinguishable from normal revsets (Thanks Augie for the suggestion). This is useful, for example, `-r 'orphan()' -d 'calc-dest(SRC)'` to solve instability, which seems to be a highly wanted feature. The feature is not completed, namely if `-d` overlaps with `-r`, things could go wrong. A later patch will handle that case. The feature is also gated by `experimental.rebase.multidest` config option which is default off. Differential Revision: https://phab.mercurial-scm.org/D469

rebase: change internal format to support destination map A later patch will add multiple destination support. This patch changes internal state and the rebase state file format to support that. But the external interface still only supports single destination. A test was added to make sure rebase still supports legacy state file. The new state file is incompatible with old clients. We had done similar state file format change before: 5eac7ab, 92409f8, and 72412af. The state file is transient, so the impact of incompatibility is limited. Besides, the old client won't support multiple destinations anyway so it does not really make sense to make the file format compatible with them. Differential Revision: https://phab.mercurial-scm.org/D348

rebase: rewrite _computeobsoletenotrebased The old code stores successors of all related nodes together, which works fine if destination is unique. A future patch would make destination non-unique so let's change the implementation to test successors for rebaseset separately. Differential Revision: https://phab.mercurial-scm.org/D347

util: use ~ as a suffix for a temp file in the same directory as a source file Tools like Buck have patterns to ignore the creation of files (in the working copy) that match certain patterns: https://github.com/facebook/buck/blob/39278a4f0701c5239eae148968dc1ed4cc8661f7/src/com/facebook/buck/cli/Main.java#L259-L299 When Buck sees a new source file (as reported by Watchman), it has to invalidate a number of caches associated with the directory that contains the file. Using a standard suffix, such as `~`, would make it easier for Buck and others to filter out these types of file creation events. The other uses of `tempfile.mkstemp()` in Hg do not appear to be problematic because they (generally speaking) do not specify the `dir` parameter, so the new file is created in the system-appropriate temp directory, which is outside the working copy. Test Plan: `make tests` Differential Revision: https://phab.mercurial-scm.org/D468

morestatus: simplify check for unresolved merge conflicts Differential Revision: https://phab.mercurial-scm.org/D546

tests: rename test-terse-status.t to test-status-terse.t When looking for status tests, most people would probably look for "test-status*", so it would be nice if they could find it there. This also let's them run (most) status tests with "run-tests.py test-status*". Differential Revision: https://phab.mercurial-scm.org/D547

metadataonlyctx: don't crash when reusing the manifest with deletions This was originally fixed by Mateusz Kwapich for the `metaedit` command in fb-hgext with a test for the `metaedit` command. It didn't get upstreamed because `metaedit` was not in core. This patch fixes the crash and adds a test about `metadataonlyctx` to avoid future regressions. Differential Revision: https://phab.mercurial-scm.org/D550

context: make parents and text optional in metadataonlyctx The metadataonlyctx is to copy an existing context with some minor metadata changes. If the caller only wants to change "extra", or "user", ideally it does not have to read and pass "parents" and "text" information. This patch makes "parents" and "text" optionally to convenient callers. Differential Revision: https://phab.mercurial-scm.org/D548

test: add more obsmarker tests for pruning scenarios The obsfate output in cases of pruning is not ideal right now, add some tests so have these scenarios around.