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Taylor Blau 3f267a1128 builtin/pack-objects.c: respect 'pack.preferBitmapTips' 
When writing a new pack with a bitmap, it is sometimes convenient to
indicate some reference prefixes which should receive priority when
selecting which commits to receive bitmaps.

A truly motivated caller could accomplish this by setting
'pack.islandCore', (since all commits in the core island are similarly
marked as preferred) but this requires callers to opt into using delta
islands, which they may or may not want to do.

Introduce a new multi-valued configuration, 'pack.preferBitmapTips' to
allow callers to specify a list of reference prefixes. All references
which have a prefix contained in 'pack.preferBitmapTips' will mark their
tips as "preferred" in the same way as commits are marked as preferred
for selection by 'pack.islandCore'.

The choice of the verb "prefer" is intentional: marking the NEEDS_BITMAP
flag on an object does *not* guarantee that that object will receive a
bitmap. It merely guarantees that that commit will receive a bitmap over
any *other* commit in the same window by bitmap_writer_select_commits().

The test this patch adds reflects this quirk, too. It only tests that
a commit (which didn't receive bitmaps by default) is selected for
bitmaps after changing the value of 'pack.preferBitmapTips' to include
it. Other commits may lose their bitmaps as a byproduct of how the
selection process works (bitmap_writer_select_commits() ignores the
remainder of a window after seeing a commit with the NEEDS_BITMAP flag).

This configuration will aide in selecting important references for
multi-pack bitmaps, since they do not respect the same pack.islandCore
configuration. (They could, but doing so may be confusing, since it is
packs--not bitmaps--which are influenced by the delta-islands
configuration).

In a fork network repository (one which lists all forks of a given
repository as remotes), for example, it is useful to set
pack.preferBitmapTips to 'refs/remotes/<root>/heads' and
'refs/remotes/<root>/tags', where '<root>' is an opaque identifier
referring to the repository which is at the base of the fork chain.

Suggested-by: Jeff King <peff@peff.net>
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-03-31 23:14:03 -07:00
..
config builtin/pack-objects.c: respect 'pack.preferBitmapTips' 2021-03-31 23:14:03 -07:00
howto Merge branch 'js/pu-to-seen' 2020-07-06 22:09:16 -07:00
RelNotes The fifth batch 2021-03-30 14:35:38 -07:00
technical Merge branch 'hn/reftable-tables-doc-update' 2021-03-01 14:02:57 -08:00
.gitattributes
.gitignore
asciidoc.conf Doc: drop support for docbook-xsl before 1.72.0 2020-03-29 09:25:38 -07:00
asciidoctor-extensions.rb
blame-options.txt blame-options.txt: camelcase blame.blankBoundary 2021-02-24 15:21:25 -08:00
build-docdep.perl
cat-texi.perl
cmd-list.perl git.txt: add list of guides 2020-08-04 18:34:02 -07:00
CodingGuidelines Merge branch 'dl/python-2.7-is-the-floor-version' 2020-06-17 21:54:05 -07:00
config.txt Merge branch 'km/config-doc-typofix' 2021-03-19 15:25:38 -07:00
date-formats.txt doc: mention approxidates for git-commit --date 2021-02-23 13:33:02 -08:00
diff-format.txt doc: indent multi-line items in list 2019-12-13 12:18:07 -08:00
diff-generate-patch.txt doc/diff-generate-patch: mention new --diff-merges option 2020-12-21 13:47:32 -08:00
diff-options.txt diff: --{rotate,skip}-to=<path> 2021-02-16 09:30:42 -08:00
doc-diff doc-diff: use single-colon rule in rendering Makefile 2020-02-18 13:53:30 -08:00
docbook-xsl.css
docbook.xsl
everyday.txto
fetch-options.txt fetch: implement support for atomic reference updates 2021-01-12 12:06:15 -08:00
fix-texi.perl
git-add.txt add: support the --pathspec-from-file option 2019-12-04 10:10:37 -08:00
git-am.txt i18n.txt: camel case and monospace "i18n.commitEncoding" 2021-02-24 15:21:25 -08:00
git-annotate.txt
git-apply.txt git-apply.txt: update descriptions of --cached, --index 2020-08-20 16:34:37 -07:00
git-archimport.txt
git-archive.txt archive: add --add-file 2020-09-19 15:56:06 -07:00
git-bisect-lk2009.txt git-bisect-lk2009: make continuation of list indented 2020-10-08 14:01:15 -07:00
git-bisect.txt bisect: swap command-line options in documentation 2020-08-28 14:06:06 -07:00
git-blame.txt mailmap doc: create a new "gitmailmap(5)" man page 2021-01-12 14:04:39 -08:00
git-branch.txt Merge branch 'jc/maint-column-doc-typofix' 2021-02-25 16:43:30 -08:00
git-bugreport.txt Merge branch 'es/bugreport-shell' 2020-06-08 18:06:28 -07:00
git-bundle.txt bundle: add new version for use with SHA-256 2020-07-30 09:16:48 -07:00
git-cat-file.txt git-cat-file.txt: remove references to "sha1" 2021-03-03 16:43:06 -08:00
git-check-attr.txt Documentation: fix a bunch of typos, both old and new 2019-11-07 13:42:00 +09:00
git-check-ignore.txt Merge branch 'en/check-ignore' into maint 2020-03-17 15:02:23 -07:00
git-check-mailmap.txt check-mailmap doc: note config options 2021-01-12 14:04:40 -08:00
git-check-ref-format.txt
git-checkout-index.txt
git-checkout.txt Merge branch 'dl/checkout-guess' 2020-10-27 15:09:51 -07:00
git-cherry-pick.txt Documentation: stylistically normalize references to Signed-off-by: 2020-10-20 11:57:40 -07:00
git-cherry.txt
git-citool.txt
git-clean.txt
git-clone.txt Documentation/git-clone.txt: document race with --local 2021-01-11 22:03:08 -08:00
git-column.txt
git-commit-graph.txt Merge branch 'ds/commit-graph-merging-fix' 2020-11-02 13:17:39 -08:00
git-commit-tree.txt Documentation: merge commit-tree --[no-]gpg-sign 2020-04-03 11:37:22 -07:00
git-commit.txt doc/git-commit: add documentation for fixup=[amend|reword] options 2021-03-15 14:29:36 -07:00
git-config.txt Merge branch 'ps/config-env-pairs' 2021-01-25 14:19:19 -08:00
git-count-objects.txt
git-credential-cache--daemon.txt
git-credential-cache.txt
git-credential-store.txt Merge branch 'cb/credential-store-ignore-bogus-lines' 2020-05-08 14:25:01 -07:00
git-credential.txt git-credential.txt: use list continuation 2020-05-18 13:19:33 -07:00
git-cvsexportcommit.txt
git-cvsimport.txt
git-cvsserver.txt Documentation: fix a bunch of typos, both old and new 2019-11-07 13:42:00 +09:00
git-daemon.txt
git-describe.txt
git-diff-files.txt
git-diff-index.txt builtin/diff-index: learn --merge-base 2020-09-20 21:30:26 -07:00
git-diff-tree.txt builtin/diff-tree: learn --merge-base 2020-09-21 13:37:03 -07:00
git-diff.txt builtin/diff-tree: learn --merge-base 2020-09-21 13:37:03 -07:00
git-difftool.txt difftool.c: learn a new way start at specified file 2021-02-22 13:35:49 -08:00
git-fast-export.txt fast-export: allow seeding the anonymized mapping 2020-06-25 14:19:23 -07:00
git-fast-import.txt fast-import: fix typo in documentation 2020-10-04 12:56:29 -07:00
git-fetch-pack.txt
git-fetch.txt fetch: allow refspecs specified through stdin 2020-08-18 13:25:05 -07:00
git-filter-branch.txt filter-branch doc: fix filter-repo typo 2020-10-20 12:22:25 -07:00
git-fmt-merge-msg.txt
git-for-each-ref.txt ref-filter: use pretty.c logic for trailers 2021-02-15 16:48:38 -08:00
git-for-each-repo.txt for-each-repo: run subcommands on configured repos 2020-09-25 10:59:44 -07:00
git-format-patch.txt format-patch: give an overview of what a "patch" message is 2021-03-24 12:14:23 -07:00
git-fsck-objects.txt
git-fsck.txt fsck doc: remove ancient out-of-date diagnostics 2021-01-20 19:10:42 -08:00
git-gc.txt docs: clarify that refs/notes/ do not keep the attached objects alive 2021-02-10 23:43:55 -08:00
git-get-tar-commit-id.txt
git-grep.txt doc: add more pointers to gitattributes(5) for userdiff 2020-11-01 15:54:14 -08:00
git-gui.txt
git-hash-object.txt
git-help.txt help: drop usage of 'common' and 'useful' for guides 2020-08-04 18:34:01 -07:00
git-http-backend.txt
git-http-fetch.txt http-fetch: allow custom index-pack args 2021-02-22 12:07:40 -08:00
git-http-push.txt
git-imap-send.txt git-imap-send.txt: add note about localized Gmail folders 2020-08-31 11:44:33 -07:00
git-index-pack.txt Merge branch 'jt/transfer-fsck-across-packs' 2021-03-01 14:02:57 -08:00
git-init-db.txt
git-init.txt init: document init.defaultBranch better 2020-12-13 15:53:50 -08:00
git-instaweb.txt
git-interpret-trailers.txt
git-log.txt Merge branch 'so/log-diff-merge' 2021-02-05 16:40:44 -08:00
git-ls-files.txt ls-files.c: add --deduplicate option 2021-01-23 11:48:20 -08:00
git-ls-remote.txt docs: adjust for the recent rename of pu to seen 2020-06-25 09:18:53 -07:00
git-ls-tree.txt doc: clarify that --abbrev=<n> is about the minimum length 2020-11-04 14:04:44 -08:00
git-mailinfo.txt i18n.txt: camel case and monospace "i18n.commitEncoding" 2021-02-24 15:21:25 -08:00
git-mailsplit.txt
git-maintenance.txt maintenance: add pack-refs task 2021-02-09 23:09:24 -08:00
git-merge-base.txt
git-merge-file.txt
git-merge-index.txt
git-merge-one-file.txt
git-merge-tree.txt
git-merge.txt Doc: reference the "stash list" in autostash docs 2020-05-05 16:07:30 -07:00
git-mergetool--lib.txt mergetool: break setup_tool out into separate initialization function 2021-02-09 14:09:16 -08:00
git-mergetool.txt doc: describe mergetool configuration in git-mergetool(1) 2021-03-13 15:34:32 -08:00
git-mktag.txt mktag: add a --[no-]strict option 2021-01-06 14:22:24 -08:00
git-mktree.txt
git-multi-pack-index.txt multi-pack-index: repack batches below --batch-size 2020-08-11 14:05:26 -07:00
git-mv.txt
git-name-rev.txt
git-notes.txt docs: improve the example that illustrates git-notes path names 2020-08-03 12:40:09 -07:00
git-p4.txt doc: fix some typos 2021-01-04 11:27:48 -08:00
git-pack-objects.txt Merge branch 'tb/geometric-repack' 2021-03-24 14:36:27 -07:00
git-pack-redundant.txt
git-pack-refs.txt
git-patch-id.txt
git-prune-packed.txt
git-prune.txt
git-pull.txt Merge branch 'dl/merge-autostash' 2020-04-29 16:15:27 -07:00
git-push.txt Documentation/git-push.txt: correct configuration typo 2021-03-13 15:41:45 -08:00
git-quiltimport.txt
git-range-diff.txt Merge branch 'js/range-diff-one-side-only' 2021-02-17 17:21:41 -08:00
git-read-tree.txt doc: --recurse-submodules mostly applies to active submodules 2020-04-06 13:42:43 -07:00
git-rebase.txt doc/git-commit: add documentation for fixup=[amend|reword] options 2021-03-15 14:29:36 -07:00
git-receive-pack.txt
git-reflog.txt
git-remote-ext.txt
git-remote-fd.txt
git-remote-helpers.txto
git-remote.txt remote: add meaningful exit code on missing/existing 2020-10-27 11:40:33 -07:00
git-repack.txt Merge branch 'tb/geometric-repack' 2021-03-24 14:36:27 -07:00
git-replace.txt
git-request-pull.txt
git-rerere.txt
git-reset.txt doc: document --recurse-submodules for reset and restore 2020-04-06 13:42:43 -07:00
git-restore.txt Doc: document "A...B" form for <tree-ish> in checkout and switch 2020-10-07 09:49:05 -07:00
git-rev-list.txt docs/rev-list: add some examples of --disk-usage 2021-02-17 16:25:29 -08:00
git-rev-parse.txt rev-parse: add option for absolute or relative path formatting 2020-12-12 23:35:51 -08:00
git-revert.txt Documentation: stylistically normalize references to Signed-off-by: 2020-10-20 11:57:40 -07:00
git-rm.txt rm: support the --pathspec-from-file option 2020-02-19 10:56:49 -08:00
git-send-email.txt Merge branch 'vv/send-email-with-less-secure-apps-access' into maint 2021-02-05 16:31:25 -08:00
git-send-pack.txt
git-sh-i18n--envsubst.txt
git-sh-i18n.txt
git-sh-setup.txt
git-shell.txt
git-shortlog.txt mailmap: only look for .mailmap in work tree 2021-02-10 13:34:51 -08:00
git-show-branch.txt
git-show-index.txt Documentation: mark --object-format=sha256 as experimental 2020-08-17 10:50:14 -07:00
git-show-ref.txt
git-show.txt doc/git-show: include --diff-merges description 2020-12-21 13:47:32 -08:00
git-sparse-checkout.txt Merge branch 'en/sparse-with-submodule-doc' 2020-06-22 15:55:03 -07:00
git-stage.txt
git-stash.txt stash show: learn stash.showIncludeUntracked 2021-03-05 14:31:27 -08:00
git-status.txt Documentation: typofix --column description 2021-02-19 19:36:47 -08:00
git-stripspace.txt
git-submodule.txt submodule: fall back to remote's HEAD for missing remote.<name>.branch 2020-06-24 09:14:21 -07:00
git-svn.txt Documentation: stylistically normalize references to Signed-off-by: 2020-10-20 11:57:40 -07:00
git-switch.txt checkout: learn to respect checkout.guess 2020-10-08 09:25:29 -07:00
git-symbolic-ref.txt
git-tag.txt Documentation: typofix --column description 2021-02-19 19:36:47 -08:00
git-tools.txt
git-unpack-file.txt
git-unpack-objects.txt
git-update-index.txt doc: remove "directory cache" from man pages 2021-01-09 22:57:24 -08:00
git-update-ref.txt update-ref: allow creation of multiple transactions 2020-11-16 13:44:01 -08:00
git-update-server-info.txt
git-upload-archive.txt
git-upload-pack.txt
git-var.txt
git-verify-commit.txt
git-verify-pack.txt
git-verify-tag.txt
git-web--browse.txt
git-whatchanged.txt
git-worktree.txt worktree: teach list verbose mode 2021-01-30 09:57:40 -08:00
git-write-tree.txt
git.txt git.txt: fix monospace rendering 2021-02-18 10:53:33 -08:00
gitattributes.txt archive: expand only a single %(describe) per archive 2021-03-11 13:22:44 -08:00
gitcli.txt Merge branch 'jc/doc-single-h-is-for-help' into maint 2020-03-17 15:02:24 -07:00
gitcore-tutorial.txt doc/gitcore-tutorial: fix prose to match example command 2020-01-08 08:56:40 -08:00
gitcredentials.txt command-list.txt: add missing 'gitcredentials' and 'gitremote-helpers' 2020-08-04 18:34:01 -07:00
gitcvs-migration.txt
gitdiffcore.txt Merge branch 'en/ort-perf-batch-8' 2021-03-22 14:00:24 -07:00
giteveryday.txt docs: adjust for the recent rename of pu to seen 2020-06-25 09:18:53 -07:00
gitfaq.txt docs: explain how to deal with files that are always modified 2020-09-20 21:29:02 -07:00
gitglossary.txt
githooks.txt githooks.txt: clarify documentation on reference-transaction hook 2021-03-01 09:02:01 -08:00
gitignore.txt doc: .gitignore documentation typofix 2021-03-03 17:16:48 -08:00
gitk.txt doc: log, gitk: move '-L' description to 'line-range-options.txt' 2020-11-01 15:54:14 -08:00
gitmailmap.txt gitmailmap.txt: fix rendering of e-mail addresses 2021-02-18 10:53:33 -08:00
gitmodules.txt gitmodules.txt: fix 'GIT_WORK_TREE' variable name 2021-01-04 11:29:36 -08:00
gitnamespaces.txt
gitremote-helpers.txt Merge branch 'bc/sha-256-part-2' 2020-07-06 22:09:13 -07:00
gitrepository-layout.txt Merge branch 'sg/dir-trie-fixes' 2019-11-10 18:02:14 +09:00
gitrevisions.txt
gitsubmodules.txt gitsubmodules doc: invoke 'ls-files' with '--recurse-submodules' 2020-10-04 12:54:07 -07:00
gittutorial-2.txt
gittutorial.txt
gitweb.conf.txt
gitweb.txt
gitworkflows.txt gitworkflows.txt: fix broken subsection underline 2020-07-18 13:43:34 -07:00
glossary-content.txt glossary: improve "branch" definition 2020-12-02 14:53:42 -08:00
howto-index.sh
i18n.txt i18n.txt: camel case and monospace "i18n.commitEncoding" 2021-02-24 15:21:25 -08:00
install-doc-quick.sh
install-webdoc.sh
line-range-format.txt doc: add more pointers to gitattributes(5) for userdiff 2020-11-01 15:54:14 -08:00
line-range-options.txt blame-options.txt: also mention 'funcname' in '-L' description 2020-11-01 15:54:14 -08:00
lint-gitlink.perl
Makefile mailmap doc: create a new "gitmailmap(5)" man page 2021-01-12 14:04:39 -08:00
manpage-base-url.xsl.in
manpage-bold-literal.xsl manpage-bold-literal.xsl: stop using git.docbook.backslash 2020-03-29 09:25:38 -07:00
manpage-normal.xsl manpage-normal.xsl: fold in manpage-base.xsl 2020-03-29 09:25:38 -07:00
manpage-quote-apos.xsl Quote ' as \(aq in manpages 2009-10-22 12:59:50 -07:00
manpage.xsl
merge-options.txt doc: preparatory clean-up of description on the sign-off option 2020-10-20 11:57:35 -07:00
merge-strategies.txt merge-strategies: fix typo "reflected to" to "reflected in" 2019-11-11 11:04:46 +09:00
MyFirstContribution.txt tests: remove support for GIT_TEST_GETTEXT_POISON 2021-01-21 15:50:01 -08:00
MyFirstObjectWalk.txt MyFirstObjectWalk: drop init_walken_defaults() 2020-11-30 13:55:54 -08:00
object-format-disclaimer.txt Documentation: mark --object-format=sha256 as experimental 2020-08-17 10:50:14 -07:00
pretty-formats.txt pretty: document multiple %(describe) being inconsistent 2021-03-01 09:50:27 -08:00
pretty-options.txt doc: clarify that --abbrev=<n> is about the minimum length 2020-11-04 14:04:44 -08:00
pull-fetch-param.txt refspec: add support for negative refspecs 2020-09-30 14:52:00 -07:00
ref-reachability-filters.txt Doc: prefer more specific file name 2020-09-18 15:41:56 -07:00
rev-list-description.txt git-log.txt: include rev-list-description.txt 2020-07-08 22:08:54 -07:00
rev-list-options.txt Merge branch 'ma/doc-markup-fix' 2021-02-25 16:43:30 -08:00
revisions.txt revisions.txt: describe 'rev1 rev2 ...' meaning for ranges 2020-07-08 22:08:53 -07:00
sequencer.txt
signoff-option.txt Documentation: stylistically normalize references to Signed-off-by: 2020-10-20 11:57:40 -07:00
SubmittingPatches SubmittingPatches: tighten wording on "sign-off" procedure 2021-01-07 15:41:36 -08:00
texi.xsl
trace2-target-values.txt
transfer-data-leaks.txt
urls-remotes.txt
urls.txt Doc: Bundle file usage 2019-10-21 12:02:39 +09:00
user-manual.conf user-manual.conf: don't specify [listingblock] 2020-03-31 16:08:02 -07:00
user-manual.txt docs: adjust for the recent rename of pu to seen 2020-06-25 09:18:53 -07:00