Documentation/RelNotes/2.24.0.txt

   1 Git 2.24 Release Notes
   2 ======================
   3
   4 Updates since v2.23
   5 -------------------
   6
   7 Backward compatibility note
   8
   9  * Although it is not officially deprecated, "filter-branch" is
  10    showing its age and alternatives are available.  From this release,
  11    we started to discourage its uses and hint people about
  12    filter-repo.
  13
  14 UI, Workflows & Features
  15
  16  * We now have an active interim maintainer for the Git-Gui part of
  17    the system.  Praise and thank Pratyush Yadav for volunteering.
  18
  19  * The command line parser learned "--end-of-options" notation; the
  20    standard convention for scripters to have hardcoded set of options
  21    first on the command line, and force the command to treat end-user
  22    input as non-options, has been to use "--" as the delimiter, but
  23    that would not work for commands that use "--" as a delimiter
  24    between revs and pathspec.
  25
  26  * A mechanism to affect the default setting for a (related) group of
  27    configuration variables is introduced.
  28
  29  * "git fetch" learned "--set-upstream" option to help those who first
  30    clone from their private fork they intend to push to, add the true
  31    upstream via "git remote add" and then "git fetch" from it.
  32
  33  * Device-tree files learned their own userdiff patterns.
  34    (merge 3c81760bc6 sb/userdiff-dts later to maint).
  35
  36  * "git rebase --rebase-merges" learned to drive different merge
  37    strategies and pass strategy specific options to them.
  38
  39  * A new "pre-merge-commit" hook has been introduced.
  40
  41  * Command line completion updates for "git -c var.name=val" have been
  42    added.
  43
  44  * The lazy clone machinery has been taught that there can be more
  45    than one promisor remote and consult them in order when downloading
  46    missing objects on demand.
  47
  48  * The list-objects-filter API (used to create a sparse/lazy clone)
  49    learned to take a combined filter specification.
  50
  51  * The documentation and tests for "git format-patch" have been
  52    cleaned up.
  53
  54  * On Windows, the root level of UNC share is now allowed to be used
  55    just like any other directory.
  56
  57  * The command line completion support (in contrib/) learned about the
  58    "--skip" option of "git revert" and "git cherry-pick".
  59
  60  * "git rebase --keep-base <upstream>" tries to find the original base
  61    of the topic being rebased and rebase on top of that same base,
  62    which is useful when running the "git rebase -i" (and its limited
  63    variant "git rebase -x").
  64
  65    The command also has learned to fast-forward in more cases where it
  66    can instead of replaying to recreate identical commits.
  67
  68  * A configuration variable tells "git fetch" to write the commit
  69    graph after finishing.
  70
  71
  72 Performance, Internal Implementation, Development Support etc.
  73
  74  * The code to write commit-graph over given commit object names has
  75    been made a bit more robust.
  76
  77  * The first line of verbose output from each test piece now carries
  78    the test name and number to help scanning with eyeballs.
  79
  80  * Further clean-up of the initialization code.
  81
  82  * xmalloc() used to have a mechanism to ditch memory and address
  83    space resources as the last resort upon seeing an allocation
  84    failure from the underlying malloc(), which made the code complex
  85    and thread-unsafe with dubious benefit, as major memory resource
  86    users already do limit their uses with various other mechanisms.
  87    It has been simplified away.
  88
  89  * Unnecessary full-tree diff in "git log -L" machinery has been
  90    optimized away.
  91
  92  * The http transport lacked some optimization the native transports
  93    learned to avoid unnecessary ref advertisement, which has been
  94    corrected.
  95
  96  * Preparation for SHA-256 upgrade continues in the test department.
  97    (merge 0c37c41d13 bc/hash-independent-tests-part-5 later to maint).
  98
  99  * The memory ownership model of the "git fast-import" got
 100    straightened out.
 101
 102  * Output from trace2 subsystem is formatted more prettily now.
 103
 104  * The internal code originally invented for ".gitignore" processing
 105    got reshuffled and renamed to make it less tied to "excluding" and
 106    stress more that it is about "matching", as it has been reused for
 107    things like sparse checkout specification that want to check if a
 108    path is "included".
 109
 110
 111
 112 Fixes since v2.23
 113 -----------------
 114
 115  * "git grep --recurse-submodules" that looks at the working tree
 116    files looked at the contents in the index in submodules, instead of
 117    files in the working tree.
 118    (merge 6a289d45c0 mt/grep-submodules-working-tree later to maint).
 119
 120  * Codepaths to walk tree objects have been audited for integer
 121    overflows and hardened.
 122    (merge 5aa02f9868 jk/tree-walk-overflow later to maint).
 123
 124  * "git pack-refs" can lose refs that are created while running, which
 125    is getting corrected.
 126    (merge a613d4f817 sc/pack-refs-deletion-racefix later to maint).
 127
 128  * "git checkout" and "git restore" to re-populate the index from a
 129    tree-ish (typically HEAD) did not work correctly for a path that
 130    was removed and then added again with the intent-to-add bit, when
 131    the corresponding working tree file was empty.  This has been
 132    corrected.
 133
 134  * Compilation fix.
 135    (merge 70597e8386 rs/nedalloc-fixlets later to maint).
 136
 137  * "git gui" learned to call the clean-up procedure before exiting.
 138    (merge 0d88f3d2c5 py/git-gui-do-quit later to maint).
 139
 140  * We promoted the "indent heuristics" that decides where to split
 141    diff hunks from experimental to the default a few years ago, but
 142    some stale documentation still marked it as experimental, which has
 143    been corrected.
 144    (merge 64e5e1fba1 sg/diff-indent-heuristic-non-experimental later to maint).
 145
 146  * Fix a mismerge that happened in 2.22 timeframe.
 147    (merge acb7da05ac en/checkout-mismerge-fix later to maint).
 148
 149  * "git archive" recorded incorrect length in extended pax header in
 150    some corner cases, which has been corrected.
 151    (merge 71d41ff651 rs/pax-extended-header-length-fix later to maint).
 152
 153  * On-demand object fetching in lazy clone incorrectly tried to fetch
 154    commits from submodule projects, while still working in the
 155    superproject, which has been corrected.
 156    (merge a63694f523 jt/diff-lazy-fetch-submodule-fix later to maint).
 157
 158  * Prepare get_short_oid() codepath to be thread-safe.
 159    (merge 7cfcb16b0e rs/sort-oid-array-thread-safe later to maint).
 160
 161  * "for-each-ref" and friends that show refs did not protect themselves
 162    against ancient tags that did not record tagger names when asked to
 163    show "%(taggername)", which have been corrected.
 164    (merge 8b3f33ef11 mp/for-each-ref-missing-name-or-email later to maint).
 165
 166  * The "git am" based backend of "git rebase" ignored the result of
 167    updating ".gitattributes" done in one step when replaying
 168    subsequent steps.
 169    (merge 2c65d90f75 bc/reread-attributes-during-rebase later to maint).
 170
 171  * Tell cURL library to use the same malloc() implementation, with the
 172    xmalloc() wrapper, as the rest of the system, for consistency.
 173    (merge 93b980e58f cb/curl-use-xmalloc later to maint).
 174
 175  * Build fix to adjust .gitignore to unignore a path that we started to track.
 176    (merge aac6ff7b5b js/visual-studio later to maint).
 177
 178  * A few implementation fixes in the notes API.
 179    (merge 60fe477a0b mh/notes-duplicate-entries later to maint).
 180
 181  * Fix an earlier regression to "git push --all" which should have
 182    been forbidden when the target remote repository is set to be a
 183    mirror.
 184    (merge 8e4c8af058 tg/push-all-in-mirror-forbidden later to maint).
 185
 186  * Fix an earlier regression in the test suite, which mistakenly
 187    stopped running HTTPD tests.
 188    (merge 3960290675 sg/git-test-boolean later to maint).
 189
 190  * "git rebase --autostash <upstream> <branch>", when <branch> is
 191    different from the current branch, incorrectly moved the tip of the
 192    current branch, which has been corrected.
 193    (merge bf1e28e0ad bw/rebase-autostash-keep-current-branch later to maint).
 194
 195  * Update support for Asciidoctor documentation toolchain.
 196    (merge 83b0b8953e ma/asciidoctor-refmiscinfo later to maint).
 197
 198  * Start using DocBook 5 (instead of DocBook 4.5) as Asciidoctor 2.0
 199    no longer works with the older one.
 200    (merge f6461b82b9 bc/doc-use-docbook-5 later to maint).
 201
 202  * The markup used in user-manual has been updated to work better with
 203    asciidoctor.
 204    (merge c4d2f6143a ma/user-manual-markup-update later to maint).
 205
 206  * Make sure the grep machinery does not abort when seeing a payload
 207    that is not UTF-8 even when JIT is not in use with PCRE1.
 208    (merge ad7c543e3b cb/skip-utf8-check-with-pcre1 later to maint).
 209
 210  * Other code cleanup, docfix, build fix, etc.
 211    (merge d1387d3895 en/fast-import-merge-doc later to maint).
 212    (merge 1c24a54ea4 bm/repository-layout-typofix later to maint).
 213    (merge 415b770b88 ds/midx-expire-repack later to maint).
 214    (merge 19800bdc3f nd/diff-parseopt later to maint).
 215    (merge 58166c2e9d tg/t0021-racefix later to maint).
 216    (merge 7027f508c7 dl/compat-cleanup later to maint).
 217    (merge e770fbfeff jc/test-cleanup later to maint).
 218    (merge 1fd881d404 rs/trace2-dst-warning later to maint).
 219    (merge 7e92756751 mh/http-urlmatch-cleanup later to maint).
 220    (merge 9784f97321 mh/release-commit-memory-fix later to maint).
 221    (merge 60d198d022 tb/banned-vsprintf-namefix later to maint).
 222    (merge 80e3658647 rs/help-unknown-ref-does-not-return later to maint).
 223    (merge 0a8bc7068f dt/remote-helper-doc-re-lock-option later to maint).
 224    (merge 27fd1e4ea7 en/merge-options-ff-and-friends later to maint).
 225    (merge 502c386ff9 sg/clean-nested-repo-with-ignored later to maint).
 226    (merge 26e3d1cbea am/mailmap-andrey-mazo later to maint).