git/Documentation/git-pack-objects.txt, branch v2.18.2

Merge branch 'nd/pack-unreachable-objects-doc'

2018-05-23T05:38:24Z

Doc update. * nd/pack-unreachable-objects-doc: pack-objects: validation and documentation about unreachable options

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

pack-objects: validation and documentation about unreachable options

2018-05-06T09:49:32Z

These options are added in [1] [2] [3]. All these depend on running rev-list internally which is normally true since they are always used with "--all --objects" which implies --revs. But let's keep this dependency explicit. While at there, add documentation for them. These are mostly used internally by git-repack. But it's still good to not chase down the right commit message to know how they work. [1] ca11b212eb (let pack-objects do the writing of unreachable objects as loose objects - 2008-05-14) [2] 08cdfb1337 (pack-objects --keep-unreachable - 2007-09-16) [3] e26a8c4721 (repack: extend --keep-unreachable to loose objects - 2016-06-13) Signed-off-by: Nguyễn Thái Ngọc Duy Reviewed-by: Jeff King Signed-off-by: Junio C Hamano

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

gc: do not repack promisor packfiles

2017-12-08T17:52:42Z

Teach gc to stop traversal at promisor objects, and to leave promisor packfiles alone. This has the effect of only repacking non-promisor packfiles, and preserves the distinction between promisor packfiles and non-promisor packfiles. Signed-off-by: Jonathan Tan Signed-off-by: Jeff Hostetler Signed-off-by: Junio C Hamano

list-objects-filter-options: support --no-filter

2017-12-05T17:44:36Z

Teach opt_parse_list_objects_filter() to take --no-filter option and to free the contents of struct filter_options. This command line argument will be automatically inherited by commands using OPT_PARSE_LIST_OBJECTS_FILTER(); this includes pack-objects. Signed-off-by: Jeff Hostetler Signed-off-by: Junio C Hamano

pack-objects: add list-objects filtering

2017-11-22T05:11:57Z

Teach pack-objects to use the filtering provided by the traverse_commit_list_filtered() interface to omit unwanted objects from the resulting packfile. Filtering requires the use of the "--stdout" option. Add t5317 test. In the future, we will introduce a "partial clone" mechanism wherein an object in a repo, obtained from a remote, may reference a missing object that can be dynamically fetched from that remote once needed. This "partial clone" mechanism will have a way, sometimes slow, of determining if a missing link is one of the links expected to be produced by this mechanism. This patch introduces handling of missing objects to help debugging and development of the "partial clone" mechanism, and once the mechanism is implemented, for a power user to perform operations that are missing-object aware without incurring the cost of checking if a missing link is expected. Signed-off-by: Jeff Hostetler Reviewed-by: Jonathan Tan Signed-off-by: Junio C Hamano

Doc: clarify that pack-objects makes packs, plural

2017-08-23T17:39:41Z

The documentation for pack-objects describes that it creates "a packed archive of objects", which is confusing because it may create multiple packs if --max-pack-size is set. Update the documentation to clarify this, and explaining in which cases such a feature would be useful. Signed-off-by: Jonathan Tan Signed-off-by: Junio C Hamano

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