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663b2b1b90
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Derrick Stolee 663b2b1b90 maintenance: add commit-graph task 
The first new task in the 'git maintenance' builtin is the
'commit-graph' task. This updates the commit-graph file
incrementally with the command

	git commit-graph write --reachable --split

By writing an incremental commit-graph file using the "--split"
option we minimize the disruption from this operation. The default
behavior is to merge layers until the new "top" layer is less than
half the size of the layer below. This provides quick writes most
of the time, with the longer writes following a power law
distribution.

Most importantly, concurrent Git processes only look at the
commit-graph-chain file for a very short amount of time, so they
will verly likely not be holding a handle to the file when we try
to replace it. (This only matters on Windows.)

If a concurrent process reads the old commit-graph-chain file, but
our job expires some of the .graph files before they can be read,
then those processes will see a warning message (but not fail).
This could be avoided by a future update to use the --expire-time
argument when writing the commit-graph.

Signed-off-by: Derrick Stolee <dstolee@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-09-17 11:30:05 -07:00
..
add.c strvec: rename struct fields 2020-07-30 19:18:06 -07:00
am.c maintenance: replace run_auto_gc() 2020-09-17 11:30:05 -07:00
annotate.c strvec: rename struct fields 2020-07-30 19:18:06 -07:00
apply.c
archive.c pack-protocol.txt: accept error packets in any context 2019-01-02 13:05:30 -08:00
bisect--helper.c Merge branch 'al/bisect-first-parent' 2020-08-17 17:02:45 -07:00
blame.c Merge branch 'dl/opt-callback-cleanup' 2020-05-05 14:54:27 -07:00
branch.c Merge branch 'es/get-worktrees-unsort' 2020-07-06 22:09:15 -07:00
bundle.c Merge branch 'bc/sha-256-part-3' 2020-08-11 18:04:11 -07:00
cat-file.c Merge branch 'cc/cat-file-usage-update' into master 2020-07-09 14:00:41 -07:00
check-attr.c cache.h: flip NO_THE_INDEX_COMPATIBILITY_MACROS switch 2019-01-24 11:55:06 -08:00
check-ignore.c check-ignore: fix documentation and implementation to match 2020-02-18 15:28:58 -08:00
check-mailmap.c
check-ref-format.c
checkout-index.c Use OPT_CALLBACK and OPT_CALLBACK_F 2020-04-28 10:47:10 -07:00
checkout.c checkout: support renormalization with checkout -m <paths> 2020-08-03 11:48:15 -07:00
clean.c clean: optimize and document cases where we recurse into subdirectories 2020-06-12 17:27:16 -07:00
clone.c Merge branch 'jk/strvec' 2020-08-10 10:23:57 -07:00
column.c builtin: consistently pass cmd_* prefix to parse_options 2019-05-13 14:22:53 +09:00
commit-graph.c Merge branch 'ds/commit-graph-bloom-updates' into master 2020-07-30 13:20:31 -07:00
commit-tree.c Use OPT_CALLBACK and OPT_CALLBACK_F 2020-04-28 10:47:10 -07:00
commit.c maintenance: replace run_auto_gc() 2020-09-17 11:30:05 -07:00
config.c worktree: drop get_worktrees() unused 'flags' argument 2020-06-22 10:31:15 -07:00
count-objects.c
credential.c
describe.c strvec: rename struct fields 2020-07-30 19:18:06 -07:00
diff-files.c diff-files: treat "i-t-a" files as "not-in-index" 2020-06-22 10:46:45 -07:00
diff-index.c cache.h: flip NO_THE_INDEX_COMPATIBILITY_MACROS switch 2019-01-24 11:55:06 -08:00
diff-tree.c diff-tree.c: load notes machinery when required 2020-04-20 18:22:54 -07:00
diff.c Merge branch 'ct/diff-with-merge-base-clarification' into master 2020-07-09 14:00:43 -07:00
difftool.c strvec: rename struct fields 2020-07-30 19:18:06 -07:00
env--helper.c env--helper: mark a file-local symbol as static 2019-07-11 14:31:04 -07:00
fast-export.c fast-export: use local array to store anonymized oid 2020-06-25 14:19:23 -07:00
fetch-pack.c Merge branch 'jt/cdn-offload' 2020-06-25 12:27:47 -07:00
fetch.c maintenance: replace run_auto_gc() 2020-09-17 11:30:05 -07:00
fmt-merge-msg.c Lib-ify fmt-merge-msg 2020-03-24 15:04:43 -07:00
for-each-ref.c Merge branch 'jk/for-each-ref-multi-key-sort-fix' 2020-05-08 14:25:04 -07:00
fsck.c fsck: do not lazy fetch known non-promisor object 2020-08-06 13:01:03 -07:00
gc.c maintenance: add commit-graph task 2020-09-17 11:30:05 -07:00
get-tar-commit-id.c builtin/get-tar-commit-id: make hash size independent 2019-04-01 11:57:39 +09:00
grep.c Merge branch 'jk/strvec' 2020-08-10 10:23:57 -07:00
hash-object.c builtin: consistently pass cmd_* prefix to parse_options 2019-05-13 14:22:53 +09:00
help.c help: drop usage of 'common' and 'useful' for guides 2020-08-04 18:34:01 -07:00
index-pack.c builtin/index-pack: add option to specify hash algorithm 2020-06-19 14:04:08 -07:00
init-db.c repository: enable SHA-256 support by default 2020-07-30 09:16:49 -07:00
interpret-trailers.c Use OPT_CALLBACK and OPT_CALLBACK_F 2020-04-28 10:47:10 -07:00
log.c Merge branch 'jk/log-fp-implies-m' 2020-08-17 17:02:49 -07:00
ls-files.c Merge branch 'dl/opt-callback-cleanup' 2020-05-05 14:54:27 -07:00
ls-remote.c strvec: convert builtin/ callers away from argv_array name 2020-07-28 15:02:18 -07:00
ls-tree.c Merge branch 'nd/attr-pathspec-in-tree-walk' 2019-01-14 15:29:28 -08:00
mailinfo.c
mailsplit.c
merge-base.c rebase: --fork-point regression fix 2020-02-11 09:59:39 -08:00
merge-file.c
merge-index.c cache.h: flip NO_THE_INDEX_COMPATIBILITY_MACROS switch 2019-01-24 11:55:06 -08:00
merge-ours.c cache.h: flip NO_THE_INDEX_COMPATIBILITY_MACROS switch 2019-01-24 11:55:06 -08:00
merge-recursive.c Ensure index matches head before invoking merge machinery, round N 2019-08-19 10:08:03 -07:00
merge-tree.c Merge branch 'jk/tree-walk-overflow' 2019-08-22 12:34:10 -07:00
merge.c maintenance: replace run_auto_gc() 2020-09-17 11:30:05 -07:00
mktag.c sha1-file: allow check_object_signature() to handle any repo 2020-01-31 10:45:39 -08:00
mktree.c mktree: drop unused length parameter 2019-05-13 14:22:54 +09:00
multi-pack-index.c multi-pack-index: add [--[no-]progress] option. 2019-10-23 12:05:06 +09:00
mv.c git-mv: improve error message for conflicted file 2020-07-20 14:35:43 -07:00
name-rev.c name-rev: sort tip names before applying 2020-02-05 10:36:33 -08:00
notes.c Use OPT_CALLBACK and OPT_CALLBACK_F 2020-04-28 10:47:10 -07:00
pack-objects.c Merge branch 'jt/has_object' 2020-08-13 14:13:39 -07:00
pack-redundant.c object-store: rename and expand packed_git's sha1 member 2019-04-01 11:57:38 +09:00
pack-refs.c Honor core.precomposeUnicode in more places 2019-04-26 10:54:03 +09:00
patch-id.c patch-id: use oid_to_hex() to print multiple object IDs 2019-12-09 12:26:40 -08:00
prune-packed.c Lib-ify prune-packed 2020-03-24 15:04:44 -07:00
prune.c Merge branch 'tb/shallow-cleanup' 2020-05-13 12:19:18 -07:00
pull.c strvec: rename struct fields 2020-07-30 19:18:06 -07:00
push.c Merge branch 'dl/push-recurse-submodules-fix' 2020-05-05 14:54:28 -07:00
range-diff.c strvec: convert builtin/ callers away from argv_array name 2020-07-28 15:02:18 -07:00
read-tree.c Use OPT_CALLBACK and OPT_CALLBACK_F 2020-04-28 10:47:10 -07:00
rebase.c maintenance: replace run_auto_gc() 2020-09-17 11:30:05 -07:00
receive-pack.c strvec: rename struct fields 2020-07-30 19:18:06 -07:00
reflog.c Merge branch 'es/get-worktrees-unsort' 2020-07-06 22:09:15 -07:00
remote-ext.c strvec: convert builtin/ callers away from argv_array name 2020-07-28 15:02:18 -07:00
remote-fd.c
remote.c strvec: rename struct fields 2020-07-30 19:18:06 -07:00
repack.c strvec: fix indentation in renamed calls 2020-07-28 15:02:18 -07:00
replace.c strvec: rename struct fields 2020-07-30 19:18:06 -07:00
rerere.c Merge branch 'nd/the-index' into md/list-objects-filter-by-depth 2019-01-15 15:38:29 -08:00
reset.c Use OPT_CALLBACK and OPT_CALLBACK_F 2020-04-28 10:47:10 -07:00
rev-list.c bisect: combine args passed to find_bisection() 2020-08-07 15:13:03 -07:00
rev-parse.c Merge branch 'tb/shallow-cleanup' 2020-05-13 12:19:18 -07:00
revert.c Merge branch 'ra/cherry-pick-revert-skip' 2019-07-19 11:30:21 -07:00
rm.c rm: support the --pathspec-from-file option 2020-02-19 10:56:49 -08:00
send-pack.c Use OPT_CALLBACK and OPT_CALLBACK_F 2020-04-28 10:47:10 -07:00
shortlog.c Use OPT_CALLBACK and OPT_CALLBACK_F 2020-04-28 10:47:10 -07:00
show-branch.c strvec: rename struct fields 2020-07-30 19:18:06 -07:00
show-index.c builtin/show-index: provide options to determine hash algo 2020-05-27 10:07:07 -07:00
show-ref.c Use OPT_CALLBACK and OPT_CALLBACK_F 2020-04-28 10:47:10 -07:00
sparse-checkout.c Merge branch 'xl/upgrade-repo-format' 2020-06-29 14:17:24 -07:00
stash.c strvec: rename struct fields 2020-07-30 19:18:06 -07:00
stripspace.c stripspace: allow -s/-c outside git repository 2018-12-26 15:41:47 -08:00
submodule--helper.c strvec: rename struct fields 2020-07-30 19:18:06 -07:00
symbolic-ref.c
tag.c Merge branch 'jk/for-each-ref-multi-key-sort-fix' 2020-05-08 14:25:04 -07:00
unpack-file.c
unpack-objects.c sha1-file: pass git_hash_algo to hash_object_file() 2020-01-31 10:45:39 -08:00
update-index.c Use OPT_CALLBACK and OPT_CALLBACK_F 2020-04-28 10:47:10 -07:00
update-ref.c strvec: rename files from argv-array to strvec 2020-07-28 15:02:17 -07:00
update-server-info.c
upload-archive.c strvec: rename struct fields 2020-07-30 19:18:06 -07:00
upload-pack.c builtin: consistently pass cmd_* prefix to parse_options 2019-05-13 14:22:53 +09:00
var.c
verify-commit.c Merge branch 'jk/no-system-includes-in-dot-c' 2019-07-31 14:38:56 -07:00
verify-pack.c Merge branch 'bc/sha-256-part-3' 2020-08-11 18:04:11 -07:00
verify-tag.c verify-tag: drop signal.h include 2019-06-19 08:19:21 -07:00
worktree.c strvec: rename struct fields 2020-07-30 19:18:06 -07:00
write-tree.c cmd_{read,write}_tree: rename "unused" variable that is used 2019-05-13 14:22:53 +09:00