Before this patch, no message is shown for failure of merging at "hg
import".
In such case, merging patch is imported as a normal revision silently,
and it may confuse users.
For simplicity, this patch recommends just using "--exact", even
though importing the merging patch itself is possible without it if:
- the hash of the 1st parent in the patch is equal to one of the
patch imported just before (or the parent of the working
directory, for the 1st patch of the series), and
- the hash of the 2nd parent in the patch is known in the local
repository
When grafting something with a matching origin, it would normally be skipped:
skipping already grafted revision 123 (23 also has origin 12)
But after stripping a graft origin, graft could fail with a reference to the
origin that no longer exists:
abort: unknown revision '5c095ad7e90f871700f02dd1fa5012cb4498a2d4'!
Instead, detect that the origin is unknown and skip it anyway, like:
skipping already grafted revision 8 (2 also has unknown origin 5c095ad7e90f871700f02dd1fa5012cb4498a2d4)
Previously, there was a copy / paste error with using the current changeset's
phase information. We now look up the parent context explicitly.
The line was too long so it is stored into a variable first.
Pull would send a getbundle command where common heads were sent both as common
and head, even though there is no reason to request a common head.
The request was thus twice as big as necessary and more likely to hit HTTP
header size limits.
Instead, don't request heads that already are common.
This is fixed in bundlerepo.getremotechanges . It could perhaps also have been
fixed in discovery.findcommonincoming but that would have a bigger impact.
The value '*' currently designates that bid merge should be used. The best
way to test bid merge is to set preferancestor=* in the configuration file ...
but then it would abort with unknown revision '*' when other code paths ended
up in changectx.ancestor .
Instead, just skip and ignore the value '*' when looking for a preferred
ancestor.
Updates with uncommited changes will always only have one ancestor - the parent
revision. Updates between existing revision should (and will) always give the
same result no matter which ancestor is used. The warning is thus only relevant
when doing a "real" merge.
When a remote is not capable of the `branchmap` wireproto command, we denote
incoming heads with None. This leads to a crash in the code in charge of
displaying the list of unknown remote heads.
We now properly detect this case and display a shorter message in this case.
The reason for this `set([None])` value is now documented.
This behavior didn't make much sense and interacts badly with things
that use unbundle internally like shelve. Presumably, the original
rationale was that since bundles didn't contain bookmarks, this gave a
sense of keeping bookmarks up-to-date like would happen with a
corresponding pull. However, since it only updated the current active
bookmark, and bare update already did that anyway, this is pretty
slim.
Notably, the corresponding test actually works better without this
feature.
dirstate.normal is the method that marks files as unchanged/normal.
Rev 03dc7365e275 started caching dirstate.normal in order to improve
performance. However, there was an error in the patch: taking the wlock, under
some conditions depending on platform, can cause a new dirstate object to be
created. Caching dirstate.normal before calling wlock would then cause the
fixup calls below to be on the old dirstate object, effectively disappearing
into the ether.
On Unix and Unix-like OSes, the condition under which we create a new dirstate
object is 'the dirstate file has been modified since the last time we opened
it'. This happens pretty rarely, so the object is usually the same -- there's
little impact.
On Windows, the condition is 'always'. This means files in the lookup state are
never marked normal, so the bug has a serious performance impact since all the
files in the lookup state are re-read every time hg status is run.
When reversing a status, trading "added" and "removed" make sense.
Reversing "deleted" and "unknown" does not. We stop doing it.
The reversing is documented in place for the poor soul not even able to remember
the index of all status elements by heart.
By the magic of code movement, we ended up dropping unknown and ignored
information when comparing the working directory with a non-parent revision.
Let's stop doing it and add a test.
Changeset 83ad0e76acc0 introduced a test to validate that file were not reported
twice when both unknown and removed. This behavior change was introduced by
64d05ea3a10f alongside a bug that dropped ignored and unknown completely
(issue4321). As we are going to fix the bug, we need a proper implementation of
the behavior tested in 83ad0e76acc0.
Old behavior:
hg help x hg x -h hg help -e x hg help -c x
config topic topic (!) - cmd
showconfig cmd topic (!) - cmd
rebase cmd cmd ext cmd
New behavior:
hg help x hg x -h hg help -e x hg help -c x
config topic cmd - cmd
showconfig cmd cmd - cmd
rebase cmd cmd ext cmd
This patch makes the warning message for "patch --partial"
translatable: this message was introduced by a0ab8b02be69, and there is
no reason to prevent this from being translatable.
When using an editor path with spaces and options, you can set 'ui.editor'
to '"/path to your/editor" -opt' and it works fine but 'hg debuginstall'
is complaining about it because it simply splits the editor and
tests presence of '"/path'.
Now correctly parse 'ui.editor' string by handling quoted path.
This patch changes help text for "--edit" option of commands below:
- fetch
- qnew
- qrefresh
- qfold
- commit
- tag
This unification reduces translation cost, too.
This patch chooses not "further edit commit message already specified"
(of "hg commit") but "invoke editor on commit messages" as unified
help text for "--edit" option, because the latter is much older than
the former.
This patch changes help text for "--message" option of commands below
for unification.
- sign (of gpg)
- tag
This unification reduces translation cost, too.
This patch doesn't change the description for "--message" of "hg
rebase" below, because this should contain "collapse" word to explain
its purpose (only for "--collapse") clearly.
use text as collapse commit message
We used to have --style nosuch to list templates, but --style is now
merged with --template/-T where random strings are acceptable
templates. So we reserve 'list' to allow listing templates.
When a bundle2 parts generator returns a non callable value, it should not be
used as a reply handler. The changegroup part generator is already having this
case of behavior when there is no changegroup to push. This changeset prevent a
crash for user of the experimentable bundle2 feature.
With this change resolve and revert produce consistent output when run with no
arguments:
$ hg resolve
abort: no files or directories specified
(use --all to remerge all files)
$ hg revert
abort: no files or directories specified
(use --all to revert all files)
f5a63a5506d2 regressed performance of baseset.__sub__ by introducing
a lazyset. This patch restores that lost performance by eagerly
evaluating baseset.__sub__ if the other set is a baseset.
revsetbenchmark.py results impacted by this change:
revset #6: roots(0::tip)
0) wall 2.923473 comb 2.920000 user 2.920000 sys 0.000000 (best of 4)
1) wall 0.077614 comb 0.080000 user 0.080000 sys 0.000000 (best of 100)
revset #23: roots((0:tip)::)
0) wall 2.875178 comb 2.880000 user 2.880000 sys 0.000000 (best of 4)
1) wall 0.154519 comb 0.150000 user 0.150000 sys 0.000000 (best of 61)
On the author's machine, this slowdown manifested during evaluation of
'roots(%ln::)' in phases.retractboundary after unbundling the Firefox
repository. Using `time hg unbundle firefox.hg` as a benchmark:
Before: 8:00
After: 4:28
Delta: -3:32
For reference, the subset and cs baseset instances impacted by this
change were of lengths 193634 and 193627, respectively.
Explicit test coverage of roots(%ln::), while similar to the existing
roots(0::tip) benchmark, has been added.
Setting substate to None was an oversight in 5b3c9729fe09 and this patch
corrects it by setting substate to an empty dictionary which matches what
subrepo code expects.
Even though "dirstate.write()" is invoked explicitly after "normal"
invocations, timestamp field of entries may be still "unset" in the
"dirstate" file itself , because "pack_dirstate" drops it when it is
equal to the timestamp of "dirstate" file itself.
This can avoid overlooking modification of files, which are updated at
same time in the second. But on the other hand, this may hide timing
critical problems.
For example, incorrect "normal"-ing (or lack of "normallookup"-ing on
the already "normal"-ed entry) is visible only when:
- the target file is modified in the working directory at T1, and
- "dirstate" file is written out at T2 (!= T1)
Otherwise, T1 is dropped by "pack_dirstate" in "dirstate.write()"
invocation, and "unset" is stored into "dirstate" file.
It often fails to reproduce problems from incorrect "normal"-ing by
Mercurial testset, because automated actions in the small repository
almost always causes that T1 and T2 are same.
This patch adds the debug feature to delay writing out to ensure
timestamp of each entries explicitly.
This feature is used to make timing critical "dirstate" problems
reproducable in subsequent patches.
This previously died in _revdescendants() taking the min() of the first set to
only(), when it was empty. An empty second set already worked. Likewise,
descendants() already handled an empty set.
This patch makes commit message shown in text editor customizable by
template. For example, this can advertise:
- sample commit messages for routine works,
- points to call attention before commit,
- message of the day, and so on
To show commit message correctly even in problematic encoding, this
patch chooses the latter below:
- replace "buildcommittext" with "buildcommittemplate" completely
- invoke "buildcommittemplate" only if '[committemplate] changeset'
is configured explicitly
For example, if multibyte character ending with backslash (0x5c) is
followed by ASCII character 'n' in the customized template, sequence
of backslash and 'n' is treated as line-feed unexpectedly (and
multibyte character is broken, too).
This corruption occurs in 'decode("string-escape")' while parsing
template string.
Add a new internal:tagmerge merge tool which implements an automatic merge
algorithm for mercurial's tag files
The tagmerge algorithm is able to resolve most merge conflicts that
currently would trigger a .hgtags merge conflict. The only case that
it does not (and cannot) handle is that in which two tags point to
different revisions on each merge parent _and_ their corresponding tag
histories have the same rank (i.e. the same length). In all other
cases the merge algorithm will choose the revision belonging to the
parent with the highest ranked tag history. The merged tag history is
the combination of both tag histories (special care is taken to try to
combine common tag histories where possible).
The algorithm also handles cases in which tags have been manually
removed from the .hgtags file and other similar corner cases.
In addition to actually merging the tags from two parents, taking into
account the base, the algorithm also tries to minimize the difference
between the merged tag file and the first parent's tag file (i.e. it
tries to make the merged tag order as as similar as possible to the
first parent's tag file order).
The algorithm works as follows:
1. read the tags from p1, p2 and the base
- when reading the p1 tags, also get the line numbers associated to each
tag node (these will be used to sort the merged tags in a way that
minimizes the diff to p1). Ignore the file numbers when reading p2 and
the base
2. recover the "lost tags" (i.e. those that are found in the base but not on p1
or p2) and add them back to p1 and/or p2
- at this point the only tags that are on p1 but not on p2 are those new
tags that were introduced in p1. Same thing for the tags that are on p2
but not on p2
3. take all tags that are only on p1 or only on p2 (but not on the base)
- Note that these are the tags that were introduced between base and p1 and
between base and p2, possibly on separate clones
4. for each tag found both on p1 and p2 perform the following merge algorithm:
- the tags conflict if their tag "histories" have the same "rank" (i.e.
length) _AND_ the last (current) tag is _NOT_ the same
- for non conflicting tags:
- choose which are the high and the low ranking nodes
- the high ranking list of nodes is the one that is longer.
In case of draw favor p1
- the merged node list is made of 3 parts:
- first the nodes that are common to the beginning of both the
low and the high ranking nodes
- second the non common low ranking nodes
- finally the non common high ranking nodes (with the last one
being the merged tag node)
- note that this is equivalent to putting the whole low ranking node
list first, followed by the non common high ranking nodes
- note that during the merge we keep the "node line numbers", which will
be used when writing the merged tags to the tag file
5. write the merged tags taking into account to their positions in the first
parent (i.e. try to keep the relative ordering of the nodes that come
from p1). This minimizes the diff between the merged and the p1 tag files
This is done by using the following algorithm
- group the nodes for a given tag that must be written next to each other
- A: nodes that come from consecutive lines on p1
- B: nodes that come from p2 (i.e. whose associated line number is None)
and are next to one of the a nodes in A
- each group is associated with a line number coming from p1
- generate a "tag block" for each of the groups
- a tag block is a set of consecutive "node tag" lines belonging to the
same tag and which will be written next to each other on the merged
tags file
- sort the "tag blocks" according to their associated number line
- put blocks whose nodes come all from p2 first
- write the tag blocks in the sorted order
Notes:
- A few tests have been added to test-tag.t. These tests are very specific to
the new internal:tagmerge tool, so perhaps they should be moved to their own
test file.
- The merge algorithm was discussed in a thread on the mercurial mailing list.
In http://markmail.org/message/anqaxldup4tmgyrx a slightly different algorithm
was suggested. In it the p1 and p2 tags would have been interleaved instead of
put one before the other. It would be possible to implement that but my tests
suggest that the merge result would be more confusing and harder to understand.
As extensively detailed by Pierre-Yves[1], simplemerge's minimal
markers can result in hopeless confusion for many common merges. As it
happens, we accidentally inherited this behavior when we borrowed
simplemerge from bzr; it is not the behavior used by RCS's merge(1),
Since merge(1) (and not bzr) is what we aim to emulate when emulating
RCS's merge markers, we simply turn this feature off. This brings us
in line with the behavior of CVS, SVN, and Git as a bonus.
(NB: using conflict markers with Mercurial is discouraged.)
[1] http://markmail.org/message/wj5mh3lc46czlvld
convert glob tessa
Before this patch, 'detailed' is used as the default of '[ui]
mergemarkers'. This embeds non-ASCII characters in tags, branches,
bookmarks, author and/or commit descriptions into merged files in the
encoding specified by '--encoding' global option, 'HGENCODING' or
other locale setting environment variables.
But, if files to be merged use another encoding, this behavior breaks
consistency of encoding in merged files.
For example, ISO-2022-JP or EUC-JP are sometimes used as the file
encoding for Japanese characters, because of historical and/or
environmental reasons, even though UTF-8 or Shift-JIS are ordinarily
used as the terminal encoding.
This can't be resolved automatically, because Mercurial doesn't aware
encoding of managed files.
This patch uses 'basic' as the default of '[ui] mergemarkers' to avoid
embedding encoding sensitive characters for safety.
This patch puts '[ui] mergemarkers = detailed' into default hgrc file
for tests, to reduce changes for tests in this patch.
For a pathological .hgignore with over 2500 glob lines and over 200000 calls to
re.escape, and with re2 available, this speeds up parsing the .hgignore from
0.75 seconds to 0.20 seconds. This causes e.g. 'hg status' with hgwatchman
enabled to go from 1.02 seconds to 0.47 seconds.
