[PATCH 1/2] upload-pack: send refs' objects despite "filter"
- From
- Jonathan Tan <jonathantanmy@google.com>
- Date
- Jul 6, 2018, 19:34 UTC
- Message-ID
- <e122c58f6febf265f9eadbfbac34a2f5729dffe2.1530905323.git.jonathantanmy@google.com>
- In-Reply-To
- <cover.1530905323.git.jonathantanmy@google.com>
A filter line in a request to upload-pack filters out objects regardless of whether they are directly referenced by a "want" line or not. This means that cloning with "--filter=blob:none" (or another filter that excludes blobs) from a repository with at least one ref pointing to a blob (for example, the Git repository itself) results in output like the following:
error: missing object referenced by 'refs/tags/junio-gpg-pub'
and if that particular blob is not referenced by a fetched tree, the resulting clone fails fsck because there is no object from the remote to vouch that the missing object is a promisor object.
Update both the protocol and the upload-pack implementation to include all explicitly specified "want" objects in the packfile regardless of the filter specification.
Signed-off-by: Jonathan Tan <jonathantanmy@google.com> --- Documentation/technical/pack-protocol.txt | 4 +++- list-objects.c | 6 +++--- object.h | 2 +- revision.c | 1 + revision.h | 3 ++- t/t5317-pack-objects-filter-objects.sh | 16 ++++++++++++++++ t/t5616-partial-clone.sh | 16 ++++++++++++++++ 7 files changed, 42 insertions(+), 6 deletions(-)
diff --git a/Documentation/technical/pack-protocol.txt b/Documentation/technical/pack-protocol.txt index 7fee6b780a..508a344cf1 100644 --- a/Documentation/technical/pack-protocol.txt +++ b/Documentation/technical/pack-protocol.txt @@ -284,7 +284,9 @@ information is sent back to the client in the next step. The client can optionally request that pack-objects omit various objects from the packfile using one of several filtering techniques. These are intended for use with partial clone and partial fetch -operations. See `rev-list` for possible "filter-spec" values. +operations. An object that does not meet a filter-spec value is +omitted unless explicitly requested in a 'want' line. See `rev-list` +for possible filter-spec values. Once all the 'want's and 'shallow's (and optional 'deepen') are transferred, clients MUST send a flush-pkt, to tell the server side diff --git a/list-objects.c b/list-objects.c index 3eec510357..be4118889a 100644 --- a/list-objects.c +++ b/list-objects.c @@ -47,7 +47,7 @@ static void process_blob(struct rev_info *revs, pathlen = path->len; strbuf_addstr(path, name); - if (filter_fn) + if (!(obj->flags & USER_GIVEN) && filter_fn) r = filter_fn(LOFS_BLOB, obj, path->buf, &path->buf[pathlen], filter_data); @@ -132,7 +132,7 @@ static void process_tree(struct rev_info *revs, } strbuf_addstr(base, name); - if (filter_fn) + if (!(obj->flags & USER_GIVEN) && filter_fn) r = filter_fn(LOFS_BEGIN_TREE, obj, base->buf, &base->buf[baselen], filter_data); @@ -171,7 +171,7 @@ static void process_tree(struct rev_info *revs, cb_data, filter_fn, filter_data); } - if (filter_fn) { + if (!(obj->flags & USER_GIVEN) && filter_fn) { r = filter_fn(LOFS_END_TREE, obj, base->buf, &base->buf[baselen], filter_data); diff --git a/object.h b/object.h index 5c13955000..cf8da6ba83 100644 --- a/object.h +++ b/object.h @@ -27,7 +27,7 @@ struct object_array { /* * object flag allocation: - * revision.h: 0---------10 26 + * revision.h: 0---------10 2526 * fetch-pack.c: 0----5 * walker.c: 0-2 * upload-pack.c: 4 11----------------19 diff --git a/revision.c b/revision.c index 40fd91ff2b..1b37da988d 100644 --- a/revision.c +++ b/revision.c @@ -172,6 +172,7 @@ static void add_pending_object_with_path(struct rev_info *revs, strbuf_release(&buf); return; /* do not add the commit itself */ } + obj->flags |= USER_GIVEN; add_object_array_with_path(obj, name, &revs->pending, mode, path); } diff --git a/revision.h b/revision.h index b8c47b98e2..dc8f96366e 100644 --- a/revision.h +++ b/revision.h @@ -19,8 +19,9 @@ #define SYMMETRIC_LEFT (1u<<8) #define PATCHSAME (1u<<9) #define BOTTOM (1u<<10) +#define USER_GIVEN (1u<<25) /* given directly by the user */ #define TRACK_LINEAR (1u<<26) -#define ALL_REV_FLAGS (((1u<<11)-1) | TRACK_LINEAR) +#define ALL_REV_FLAGS (((1u<<11)-1) | USER_GIVEN | TRACK_LINEAR) #define DECORATE_SHORT_REFS 1 #define DECORATE_FULL_REFS 2 diff --git a/t/t5317-pack-objects-filter-objects.sh b/t/t5317-pack-objects-filter-objects.sh index 1b0acc383b..6710c8bc8c 100755 --- a/t/t5317-pack-objects-filter-objects.sh +++ b/t/t5317-pack-objects-filter-objects.sh @@ -160,6 +160,22 @@ test_expect_success 'verify blob:limit=1k' ' test_cmp observed expected ' +test_expect_success 'verify explicitly specifying oversized blob in input' ' + git -C r2 ls-files -s large.1000 large.10000 \ + | awk -f print_2.awk \ + | sort >expected && + git -C r2 pack-objects --rev --stdout --filter=blob:limit=1k >filter.pack <<-EOF && + HEAD + $(git -C r2 rev-parse HEAD:large.10000) + EOF + git -C r2 index-pack ../filter.pack && + git -C r2 verify-pack -v ../filter.pack \ + | grep blob \ + | awk -f print_1.awk \ + | sort >observed && + test_cmp observed expected +' + test_expect_success 'verify blob:limit=1m' ' git -C r2 ls-files -s large.1000 large.10000 \ | awk -f print_2.awk \ diff --git a/t/t5616-partial-clone.sh b/t/t5616-partial-clone.sh index cee5565367..8a2bf86491 100755 --- a/t/t5616-partial-clone.sh +++ b/t/t5616-partial-clone.sh @@ -154,4 +154,20 @@ test_expect_success 'partial clone with transfer.fsckobjects=1 uses index-pack - grep "git index-pack.*--fsck-objects" trace ' +test_expect_success 'partial clone fetches blobs pointed to by refs even if normally filtered out' ' + rm -rf src dst && + git init src && + test_commit -C src x && + test_config -C src uploadpack.allowfilter 1 && + test_config -C src uploadpack.allowanysha1inwant 1 && + + # Create a tag pointing to a blob. + BLOB=$(echo blob-contents | git -C src hash-object --stdin -w) && + git -C src tag myblob "$BLOB" && + + git clone --filter="blob:none" "file://$(pwd)/src" dst 2>err && + ! grep "does not point to a valid object" err && + git -C dst fsck +' + test_done
-- 2.18.0.203.gfac676dfb9-goog