From: Jeff Hostetler <jeffh...@microsoft.com>
This WIP is a follow up to my earlier patch series to teach
pack-objects to omit large blobs from packfiles. [1]
Like the previous version, this version builds upon a suggestion from
Peff [2] to use the traverse_commit_list() machinery to allow custom
object filtering using a filter callback. This hides the filtering
logic in list-objects.c and list-objects-filters.c and minimizes the
changes to actual commands, such as pack-objects.
This version adds that same filtering capability to rev-list allowing
filtering to be demonstrated without building a packfile. Filtered
blobs are printed with a leading "~" (along with their sizes).
$ ./git rev-list --objects HEAD~1..HEAD
74f806c70507317b8bdbcf3b08459c7c83906bee
818617707aac81ae4620239182b514f65638e37e
d21329bffeb9801682d8d6d6acedc2958d17f4e0 builtin
306c16551e548ace12c709a332bfea22adcc395f builtin/fetch.c
$ ./git rev-list --objects --filter-omit-all-blobs --filter-print-manifest
HEAD~1..HEAD
74f806c70507317b8bdbcf3b08459c7c83906bee
818617707aac81ae4620239182b514f65638e37e
d21329bffeb9801682d8d6d6acedc2958d17f4e0 builtin
~306c16551e548ace12c709a332bfea22adcc395f 40732
$ ./git rev-list --objects --filter-omit-all-blobs --filter-print-manifest
--quiet HEAD~1..HEAD
~306c16551e548ace12c709a332bfea22adcc395f 40732
This version contains 3 filters:
1. filter-omit-all-blobs to exclude all blobs (trees and commits only).
2. filter-omit-large-blobs=<n>[kmg] to exclude blobs larger than <n>
(but always including ".git*" special files).
3. filter-use-sparse=<blob-ish> to exclude blobs not needed by the
corresponding sparse-checkout.
Sparse-checkout filtering is currently limited to filtering unneeded blobs.
A later enhancement should be able to also filter unneeded tree objects.
This version updates clone, fetch, fetch-pack, and upload-pack commands
to pass the additional object-filter parameters.
As a (possibly) temporary measure, some commands have been updated to
relax missing blob errors during consistency checks. Maintining info
on missing blobs is currently being discussed in [3].
TODO
1. Incorporate with a patch series like [4] to dynamically fetch a
missing blob from the server in read_object on demand.
2. Resolve missing blob consistency check issue.
3. Store filter options from clone in config or .git/info and default
to them in subsequent fetches.
4. fsck, gc, and assorted commands.
5. testing.
[1] https://public-inbox.org/git/20170622203615.34135-1-...@jeffhostetler.com/
[2]
https://public-inbox.org/git/20170309073117.g3br5btsfwntc...@sigill.intra.peff.net/
[3] https://public-inbox.org/git/cover.1499800530.git.jonathanta...@google.com/
[4] https://public-inbox.org/git/20170505152802.6724-1-benpe...@microsoft.com/
Jeff Hostetler (19):
dir: refactor add_excludes()
oidset2: create oidset subclass with object length and pathname
list-objects: filter objects in traverse_commit_list
list-objects-filters: add omit-all-blobs filter
list-objects-filters: add omit-large-blobs filter
list-objects-filters: add use-sparse-checkout filter
object-filter: common declarations for object filtering
rev-list: add object filtering support
rev-list: add filtering help text
t6112: rev-list object filtering test
pack-objects: add object filtering support
pack-objects: add filtering help text
upload-pack: add filter-objects to protocol documentation
upload-pack: add object filtering
fetch-pack: add object filtering support
connected: add filter_allow_omitted option to API
clone: add filter arguments
index-pack: relax consistency checks for omitted objects
fetch: add object filtering to fetch
Documentation/git-pack-objects.txt | 14 +
Documentation/git-rev-list.txt | 7 +-
Documentation/rev-list-options.txt | 26 ++
Documentation/technical/pack-protocol.txt | 16 +
Documentation/technical/protocol-capabilities.txt | 7 +
Makefile | 3 +
builtin/clone.c | 28 ++
builtin/fetch-pack.c | 3 +
builtin/fetch.c | 27 +-
builtin/index-pack.c | 15 +
builtin/pack-objects.c | 33 +-
builtin/rev-list.c | 58 +++-
connected.c | 3 +
connected.h | 6 +
dir.c | 53 +++-
dir.h | 4 +
fetch-pack.c | 28 ++
fetch-pack.h | 2 +
list-objects-filters.c | 361 ++++++++++++++++++++++
list-objects-filters.h | 45 +++
list-objects.c | 66 +++-
list-objects.h | 30 ++
object-filter.c | 201 ++++++++++++
object-filter.h | 145 +++++++++
oidset2.c | 101 ++++++
oidset2.h | 56 ++++
t/t6112-rev-list-filters-objects.sh | 37 +++
transport.c | 27 ++
transport.h | 8 +
upload-pack.c | 39 ++-
30 files changed, 1425 insertions(+), 24 deletions(-)
create mode 100644 list-objects-filters.c
create mode 100644 list-objects-filters.h
create mode 100644 object-filter.c
create mode 100644 object-filter.h
create mode 100644 oidset2.c
create mode 100644 oidset2.h
create mode 100644 t/t6112-rev-list-filters-objects.sh
--
2.9.3
