git/Documentation/git-repack.txt, branch v2.22.2

Merge branch 'cc/delta-islands'

2018-09-17T20:53:55Z

Lift code from GitHub to restrict delta computation so that an object that exists in one fork is not made into a delta against another object that does not appear in the same forked repository. * cc/delta-islands: pack-objects: move 'layer' into 'struct packing_data' pack-objects: move tree_depth into 'struct packing_data' t5320: tests for delta islands repack: add delta-islands support pack-objects: add delta-islands support pack-objects: refactor code into compute_layer_order() Add delta-islands.{c,h}

repack: add delta-islands support

2018-08-16T17:51:17Z

Implement simple support for --delta-islands option and repack.useDeltaIslands config variable in git repack. This allows users to setup delta islands in their config and get the benefit of less disk usage while cloning and fetching is still quite fast and not much more CPU intensive. Signed-off-by: Jeff King Signed-off-by: Christian Couder Signed-off-by: Junio C Hamano

repack: repack promisor objects if -a or -A is set

2018-08-09T16:17:39Z

Currently, repack does not touch promisor packfiles at all, potentially causing the performance of repositories that have many such packfiles to drop. Therefore, repack all promisor objects if invoked with -a or -A. This is done by an additional invocation of pack-objects on all promisor objects individually given, which takes care of deduplication and allows the resulting packfiles to respect flags such as --max-pack-size. Signed-off-by: Jonathan Tan Signed-off-by: Junio C Hamano

Merge branch 'nd/pack-objects-pack-struct'

2018-05-23T05:38:19Z

"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. * nd/pack-objects-pack-struct: ci: exercise the whole test suite with uncommon code in pack-objects pack-objects: reorder members to shrink struct object_entry pack-objects: shrink delta_size field in struct object_entry pack-objects: shrink size field in struct object_entry pack-objects: clarify the use of object_entry::size pack-objects: don't check size when the object is bad pack-objects: shrink z_delta_size field in struct object_entry pack-objects: refer to delta objects by index instead of pointer pack-objects: move in_pack out of struct object_entry pack-objects: move in_pack_pos out of struct object_entry pack-objects: use bitfield for object_entry::depth pack-objects: use bitfield for object_entry::dfs_state pack-objects: turn type and in_pack_type to bitfields pack-objects: a bit of document about struct object_entry read-cache.c: make $GIT_TEST_SPLIT_INDEX boolean

repack: add --keep-pack option

2018-04-16T04:52:29Z

We allow to keep existing packs by having companion .keep files. This is helpful when a pack is permanently kept. In the next patch, git-gc just wants to keep a pack temporarily, for one pack-objects run. git-gc can use --keep-pack for this use case. A note about why the pack_keep field cannot be reused and pack_keep_in_core has to be added. This is about the case when --keep-pack is specified together with either --keep-unreachable or --unpack-unreachable, but --honor-pack-keep is NOT specified. In this case, we want to exclude objects from the packs specified on command line, not from ones with .keep files. If only one bit flag is used, we have to clear pack_keep on pack files with the .keep file. But we can't make any assumption about unreachable objects in .keep packs. If "pack_keep" field is false for .keep packs, we could potentially pull lots of unreachable objects into the new pack, or unpack them loose. The safer approach is ignore all packs with either .keep file or --keep-pack. Signed-off-by: Nguyễn Thái Ngọc Duy Signed-off-by: Junio C Hamano

pack-objects: use bitfield for object_entry::depth

2018-04-16T03:38:58Z

Because of struct packing from now on we can only handle max depth 4095 (or even lower when new booleans are added in this struct). This should be ok since long delta chain will cause significant slow down anyway. Signed-off-by: Nguyễn Thái Ngọc Duy Signed-off-by: Junio C Hamano

repack: accept --threads= and pass it down to pack-objects

2017-04-26T23:09:25Z

We already do so for --window= and --depth=; this will help when the user wants to force --threads=1 for reproducible testing without getting affected by racing multiple threads. Signed-off-by: Junio C Hamano

Merge branch 'ms/document-pack-window-memory-is-per-thread'

2016-08-12T16:47:35Z

* ms/document-pack-window-memory-is-per-thread: document git-repack interaction of pack.threads and pack.windowMemory

document git-repack interaction of pack.threads and pack.windowMemory

2016-08-10T17:55:13Z

Signed-off-by: Michael Stahl Signed-off-by: Junio C Hamano

Merge branch 'mm/doc-tt'

2016-07-13T18:24:14Z

More mark-up updates to typeset strings that are expected to literally typed by the end user in fixed-width font. * mm/doc-tt: doc: typeset HEAD and variants as literal CodingGuidelines: formatting HEAD in documentation doc: typeset long options with argument as literal doc: typeset '--' as literal doc: typeset long command-line options as literal doc: typeset short command-line options as literal Documentation/git-mv.txt: fix whitespace indentation