want to move to z/d by taking the hint that the entire directory
'x' moved to 'z'. A bug causing dirty files involved in a rename
to be overwritten during merge has also been fixed as part of this
- work.
+ work. Incidentally, this also avoids updating a file in the
+ working tree after a (non-trivial) merge whose result matches what
+ our side originally had.
* "git filter-branch" learned to use a different exit code to allow
the callers to tell the case where there was no new commits to
"feature" to fetch only commits and/or trees, which nobody used.
This has been removed.
+ * The functionality of "$GIT_DIR/info/grafts" has been superseded by
+ the "refs/replace/" mechanism for some time now, but the internal
+ code had support for it in many places, which has been cleaned up
+ in order to drop support of the "grafts" mechanism.
+
+ * "git worktree add" learned to check out an existing branch.
+
+ * "git --no-pager cmd" did not have short-and-sweet single letter
+ option. Now it does as "-P".
+ (merge 7213c28818 js/no-pager-shorthand later to maint).
+
+ * "git rebase" learned "--rebase-merges" to transplant the whole
+ topology of commit graph elsewhere.
+
+ * "git status" learned to pay attention to UI related diff
+ configuration variables such as diff.renames.
+
+ * The command line completion mechanism (in contrib/) learned to load
+ custom completion file for "git $command" where $command is a
+ custom "git-$command" that the end user has on the $PATH when using
+ newer version of bash.
+
+ * "git send-email" can sometimes offer confirmation dialog "Send this
+ email?" with choices 'Yes', 'No', 'Quit', and 'All'. A new action
+ 'Edit' has been added to this dialog's choice.
+
+ * With merge.renames configuration set to false, the recursive merge
+ strategy can be told not to spend cycles trying to find renamed
+ paths and merge them accordingly.
+
+ * "git status" learned to honor a new status.renames configuration to
+ skip rename detection, which could be useful for those who want to
+ do so without disabling the default rename detection done by the
+ "git diff" command.
+
+ * Command line completion (in contrib/) learned to complete pathnames
+ for various commands better.
+
+ * "git blame" learns to unhighlight uninteresting metadata from the
+ originating commit on lines that are the same as the previous one,
+ and also paint lines in different colors depending on the age of
+ the commit.
+
+ * Transfer protocol v2 learned to support the partial clone.
+
+ * When a short hexadecimal string is used to name an object but there
+ are multiple objects that share the string as the prefix of their
+ names, the code lists these ambiguous candidates in a help message.
+ These object names are now sorted according to their types for
+ easier eyeballing.
+
+ * "git fetch $there $refspec" that talks over protocol v2 can take
+ advantage of server-side ref filtering; the code has been extended
+ so that this mechanism triggers also when fetching with configured
+ refspec.
+
+ * Our HTTP client code used to advertise that we accept gzip encoding
+ from the other side; instead, just let cURL library to advertise
+ and negotiate the best one.
+
+ * "git p4" learned to "unshelve" shelved commit from P4.
+ (merge 123f631761 ld/p4-unshelve later to maint).
+
Performance, Internal Implementation, Development Support etc.
* The code to interface to GPG has been restructured somewhat to make
it cleaner to integrate with other types of signature systems later.
+ * The code has been taught to use the duplicated information stored
+ in the commit-graph file to learn the tree object name for a commit
+ to avoid opening and parsing the commit object when it makes sense
+ to do so.
+
+ * "git gc" in a large repository takes a lot of time as it considers
+ to repack all objects into one pack by default. The command has
+ been taught to pretend as if the largest existing packfile is
+ marked with ".keep" so that it is left untouched while objects in
+ other packs and loose ones are repacked.
+
+ * The transport protocol v2 is getting updated further.
+
+ * The codepath around object-info API has been taught to take the
+ repository object (which in turn tells the API which object store
+ the objects are to be located).
+
+ * "git pack-objects" needs to allocate tons of "struct object_entry"
+ while doing its work, and shrinking its size helps the performance
+ quite a bit.
+
+ * The implementation of "git rebase -i --root" has been updated to use
+ the sequencer machinery more.
+
+ * Developer support update, by using BUG() macro instead of die() to
+ mark codepaths that should not happen more clearly.
+
+ * Developer support. Use newer GCC on one of the builds done at
+ TravisCI.org to get more warnings and errors diagnosed.
+
+ * Conversion from uchar[20] to struct object_id continues.
+
+ * By code restructuring of submodule merge in merge-recursive,
+ informational messages from the codepath are now given using the
+ same mechanism as other output, and honor the merge.verbosity
+ configuration. The code also learned to give a few new messages
+ when a submodule three-way merge resolves cleanly when one side
+ records a descendant of the commit chosen by the other side.
+
+ * Avoid unchecked snprintf() to make future code auditing easier.
+ (merge ac4896f007 jk/snprintf-truncation later to maint).
+
+ * Many tests hardcode the raw object names, which would change once
+ we migrate away from SHA-1. While some of them must test against
+ exact object names, most of them do not have to use hardcoded
+ constants in the test. The latter kind of tests have been updated
+ to test the moral equivalent of the original without hardcoding the
+ actual object names.
+
+ * The list of commands with their various attributes were spread
+ across a few places in the build procedure, but it now is getting a
+ bit more consolidated to allow more automation.
+
+ * Quite a many tests assumed that newly created refs are made as
+ loose refs using the files backend, which have been updated to use
+ proper plumbing like rev-parse and update-ref, to avoid breakage
+ once we start using different ref backends.
+
Also contains various documentation updates and code clean-ups.
some merge commits in certain cases, which has been corrected.
(merge be011bbe00 ma/fast-export-skip-merge-fix later to maint).
+ * The code did not propagate the terminal width to subprocesses via
+ COLUMNS environment variable, which it now does. This caused
+ trouble to "git column" helper subprocess when "git tag --column=row"
+ tried to list the existing tags on a display with non-default width.
+ (merge b5d5a567fb nd/term-columns later to maint).
+
+ * We learned that our source files with ".pl" and ".py" extensions
+ are Perl and Python files respectively and changes to them are
+ better viewed as such with appropriate diff drivers.
+ (merge 7818b619e2 ab/perl-python-attrs later to maint).
+
+ * "git rebase -i" sometimes left intermediate "# This is a
+ combination of N commits" message meant for the human consumption
+ inside an editor in the final result in certain corner cases, which
+ has been fixed.
+ (merge 15ef69314d js/rebase-i-clean-msg-after-fixup-continue later to maint).
+
+ * A test to see if the filesystem normalizes UTF-8 filename has been
+ updated to check what we need to know in a more direct way, i.e. a
+ path created in NFC form can be accessed with NFD form (or vice
+ versa) to cope with APFS as well as HFS.
+ (merge 742ae10e35 tb/test-apfs-utf8-normalization later to maint).
+
+ * "git format-patch --cover --attach" created a broken MIME multipart
+ message for the cover letter, which has been fixed by keeping the
+ cover letter as plain text file.
+ (merge 50cd54ef4e bc/format-patch-cover-no-attach later to maint).
+
+ * The split-index feature had a long-standing and dormant bug in
+ certain use of the in-core merge machinery, which has been fixed.
+ (merge 7db118303a en/unpack-trees-split-index-fix later to maint).
+
+ * Asciidoctor gives a reasonable imitation for AsciiDoc, but does not
+ render illustration in a literal block correctly when indented with
+ HT by default. The problem is fixed by forcing 8-space tabs.
+ (merge 379805051d bc/asciidoctor-tab-width later to maint).
+
+ * Code clean-up to adjust to a more recent lockfile API convention that
+ allows lockfile instances kept on the stack.
+ (merge 0fa5a2ed8d ma/lockfile-cleanup later to maint).
+
+ * the_repository->index is not a allocated piece of memory but
+ repo_clear() indiscriminately attempted to free(3) it, which has
+ been corrected.
+ (merge 74373b5f10 nd/repo-clear-keep-the-index later to maint).
+
+ * Code clean-up to avoid non-standard-conformant pointer arithmetic.
+ (merge c112084af9 rs/no-null-ptr-arith-in-fast-export later to maint).
+
+ * Code clean-up to turn history traversal more robust in a
+ semi-corrupt repository.
+ (merge 8702b30fd7 jk/unavailable-can-be-missing later to maint).
+
+ * "git update-ref A B" is supposed to ensure that ref A does not yet
+ exist when B is a NULL OID, but this check was not done correctly
+ for pseudo-refs outside refs/ hierarchy, e.g. MERGE_HEAD.
+
+ * "git submodule update" and "git submodule add" supported the
+ "--reference" option to borrow objects from a neighbouring local
+ repository like "git clone" does, but lacked the more recent
+ invention "--dissociate". Also "git submodule add" has been taught
+ to take the "--progress" option.
+ (merge a0ef29341a cf/submodule-progress-dissociate later to maint).
+
+ * Update credential-netrc helper (in contrib/) to allow customizing
+ the GPG used to decrypt the encrypted .netrc file.
+ (merge 786ef50a23 lm/credential-netrc later to maint).
+
+ * "git submodule update" attempts two different kinds of "git fetch"
+ against the upstream repository to grab a commit bound at the
+ submodule's path, but it incorrectly gave up if the first kind
+ (i.e. a normal fetch) failed, making the second "last resort" one
+ (i.e. fetching an exact commit object by object name) ineffective.
+ This has been corrected.
+ (merge e30d833671 sb/submodule-update-try-harder later to maint).
+
+ * Error behaviour of "git grep" when it cannot read the index was
+ inconsistent with other commands that uses the index, which has
+ been corrected to error out early.
+ (merge b2aa84c789 sb/grep-die-on-unreadable-index later to maint).
+
+ * We used to call regfree() after regcomp() failed in some codepaths,
+ which have been corrected.
+ (merge 17154b1576 ma/regex-no-regfree-after-comp-fail later to maint).
+
+ * The import-tars script (in contrib/) has been taught to handle
+ tarballs with overly long paths that use PAX extended headers.
+ (merge 12ecea46e3 pa/import-tars-long-names later to maint).
+
+ * "git rev-parse Y..." etc. misbehaved when given endpoints were
+ not committishes.
+ (merge 0ed556d38f en/rev-parse-invalid-range later to maint).
+
* Other minor doc, test and build updates and code cleanups.
(merge 248f66ed8e nd/trace-with-env later to maint).
(merge 14ced5562c ys/bisect-object-id-missing-conversion-fix later to maint).
(merge adc887221f tq/t1510 later to maint).
(merge bed21a8ad6 sg/doc-gc-quote-mismatch-fix later to maint).
(merge 73364e4f10 tz/doc-git-urls-reference later to maint).
+ (merge cd1e606bad bc/mailmap-self later to maint).
+ (merge f7997e3682 ao/config-api-doc later to maint).
+ (merge ee930754d8 jk/apply-p-doc later to maint).
+ (merge 011b648646 nd/pack-format-doc later to maint).
+ (merge 87a6bb701a sg/t5310-jgit-bitmap-test later to maint).
+ (merge f6b82970aa sg/t5516-fixes later to maint).
+ (merge 4362da078e sg/t7005-spaces-in-filenames-cleanup later to maint).
+ (merge 7d0ee47c11 js/test-unset-prereq later to maint).
+ (merge 5356a3c354 ah/misc-doc-updates later to maint).
+ (merge 92c4a7a129 nd/completion-aliasfiletype-typofix later to maint).
+ (merge 58bd77b66a nd/pack-unreachable-objects-doc later to maint).
+ (merge 4ed79d5203 sg/t6500-no-redirect-of-stdin later to maint).
+ (merge 17b8a2d6cd jk/config-blob-sans-repo later to maint).
+ (merge 590551ca2c rd/tag-doc-lightweight later to maint).
+ (merge 44f560fc16 rd/init-typo later to maint).