- 11 12月, 2013 5 次提交
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由 Nguyễn Thái Ngọc Duy 提交于
When "fetch --depth=N" where N exceeds the longest chain of history in the source repo, usually we just send an "unshallow" line to the client so full history is obtained. When the source repo is shallow we need to make sure to "unshallow" the current shallow point _and_ "shallow" again when the commit reaches its shallow bottom in the source repo. This should fix both cases: large <N> and --unshallow. Signed-off-by: NNguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: NJunio C Hamano <gitster@pobox.com>
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由 Nguyễn Thái Ngọc Duy 提交于
Signed-off-by: NNguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: NJunio C Hamano <gitster@pobox.com>
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由 Nguyễn Thái Ngọc Duy 提交于
Suppose a fetch or push is requested between two shallow repositories (with no history deepening or shortening). A pack that contains necessary objects is transferred over together with .git/shallow of the sender. The receiver has to determine whether it needs to update .git/shallow if new refs needs new shallow comits. The rule here is avoid updating .git/shallow by default. But we don't want to waste the received pack. If the pack contains two refs, one needs new shallow commits installed in .git/shallow and one does not, we keep the latter and reject/warn about the former. Even if .git/shallow update is allowed, we only add shallow commits strictly necessary for the former ref (remember the sender can send more shallow commits than necessary) and pay attention not to accidentally cut the receiver history short (no history shortening is asked for) So the steps to figure out what ref need what new shallow commits are: 1. Split the sender shallow commit list into "ours" and "theirs" list by has_sha1_file. Those that exist in current repo in "ours", the remaining in "theirs". 2. Check the receiver .git/shallow, remove from "ours" the ones that also exist in .git/shallow. 3. Fetch the new pack. Either install or unpack it. 4. Do has_sha1_file on "theirs" list again. Drop the ones that fail has_sha1_file. Obviously the new pack does not need them. 5. If the pack is kept, remove from "ours" the ones that do not exist in the new pack. 6. Walk the new refs to answer the question "what shallow commits, both ours and theirs, are required in .git/shallow in order to add this ref?". Shallow commits not associated to any refs are removed from their respective list. 7. (*) Check reachability (from the current refs) of all remaining commits in "ours". Those reachable are removed. We do not want to cut any part of our (reachable) history. We only check up commits. True reachability test is done by check_everything_connected() at the end as usual. 8. Combine the final "ours" and "theirs" and add them all to .git/shallow. Install new refs. The case where some hook rejects some refs on a push is explained in more detail in the push patches. Of these steps, #6 and #7 are expensive. Both require walking through some commits, or in the worst case all commits. And we rather avoid them in at least common case, where the transferred pack does not contain any shallow commits that the sender advertises. Let's look at each scenario: 1) the sender has longer history than the receiver All shallow commits from the sender will be put into "theirs" list at step 1 because none of them exists in current repo. In the common case, "theirs" becomes empty at step 4 and exit early. 2) the sender has shorter history than the receiver All shallow commits from the sender are likely in "ours" list at step 1. In the common case, if the new pack is kept, we could empty "ours" and exit early at step 5. If the pack is not kept, we hit the expensive step 6 then exit after "ours" is emptied. There'll be only a handful of objects to walk in fast-forward case. If it's forced update, we may need to walk to the bottom. 3) the sender has same .git/shallow as the receiver This is similar to case 2 except that "ours" should be emptied at step 2 and exit early. A fetch after "clone --depth=X" is case 1. A fetch after "clone" (from a shallow repo) is case 3. Luckily they're cheap for the common case. A push from "clone --depth=X" falls into case 2, which is expensive. Some more work may be done at the sender/client side to avoid more work on the server side: if the transferred pack does not contain any shallow commits, send-pack should not send any shallow commits to the receive-pack, effectively turning it into a normal push and avoid all steps. This patch implements all steps except #3, already handled by fetch-pack and receive-pack, #6 and #7, which has their own patch due to their size. (*) in previous versions step 7 was put before step 3. I reorder it so that the common case that keeps the pack does not need to walk commits at all. In future if we implement faster commit reachability check (maybe with the help of pack bitmaps or commit cache), step 7 could become cheap and be moved up before 6 again. Signed-off-by: NNguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: NJunio C Hamano <gitster@pobox.com>
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由 Nguyễn Thái Ngọc Duy 提交于
Signed-off-by: NNguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: NJunio C Hamano <gitster@pobox.com>
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由 Nguyễn Thái Ngọc Duy 提交于
If either receive-pack or upload-pack is called on a shallow repository, shallow commits (*) will be sent after the ref advertisement (but before the packet flush), so that the receiver has the full "shape" of the sender's commit graph. This will be needed for the receiver to update its .git/shallow if necessary. This breaks the protocol for all clients trying to push to a shallow repo, or fetch from one. Which is basically the same end result as today's "is_repository_shallow() && die()" in receive-pack and upload-pack. New clients will be made aware of shallow upstream and can make use of this information. The sender must send all shallow commits that are sent in the following pack. It may send more shallow commits than necessary. upload-pack for example may choose to advertise no shallow commits if it knows in advance that the pack it's going to send contains no shallow commits. But upload-pack is the server, so we choose the cheaper way, send full .git/shallow and let the client deal with it. Smart HTTP is not affected by this patch. Shallow support on smart-http comes later separately. (*) A shallow commit is a commit that terminates the revision walker. It is usually put in .git/shallow in order to keep the revision walker from going out of bound because there is no guarantee that objects behind this commit is available. Signed-off-by: NNguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: NJunio C Hamano <gitster@pobox.com>
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- 29 8月, 2013 2 次提交
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由 Nguyễn Thái Ngọc Duy 提交于
This function is like setup_alternate_shallow() except that it does not lock $GIT_DIR/shallow. It is supposed to be used when a program generates temporary shallow for use by another program, then throw the shallow file away. Signed-off-by: NNguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: NJunio C Hamano <gitster@pobox.com>
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由 Nguyễn Thái Ngọc Duy 提交于
for_each_commit_graft() goes through all graft points, and shallow boundaries are just one special kind of grafting. If $GIT_DIR/shallow and $GIT_DIR/info/grafts are both present, write_shallow_commits() may catch both sets, accidentally turning some graft points to shallow boundaries. Don't do that. Signed-off-by: NNguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: NJunio C Hamano <gitster@pobox.com>
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- 19 8月, 2013 1 次提交
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由 Nguyễn Thái Ngọc Duy 提交于
Signed-off-by: NNguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: NJunio C Hamano <gitster@pobox.com>
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- 16 7月, 2013 1 次提交
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由 Matthijs Kooijman 提交于
Commit 682c7d2f (upload-pack: fix off-by-one depth calculation in shallow clone) introduced a new check in get_shallow_commits to decide when to stop traversing the history and mark the current commit as a shallow root. With this new check in place, the old check can no longer be true, since the first check always fires first. This commit removes that check, making the code a bit more simple again. Signed-off-by: NMatthijs Kooijman <matthijs@stdin.nl> Acked-by: NDuy Nguyen <pclouds@gmail.com> Signed-off-by: NJunio C Hamano <gitster@pobox.com>
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- 28 5月, 2013 1 次提交
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由 Nguyễn Thái Ngọc Duy 提交于
index-pack --strict looks up and follows parent commits. If shallow information is not ready by the time index-pack is run, index-pack may be led to non-existent objects. Make fetch-pack save shallow file to disk before invoking index-pack. git learns new global option --shallow-file to pass on the alternate shallow file path. Undocumented (and not even support --shallow-file= syntax) because it's unlikely to be used again elsewhere. Signed-off-by: NNguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: NJunio C Hamano <gitster@pobox.com>
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- 12 1月, 2013 1 次提交
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由 Nguyễn Thái Ngọc Duy 提交于
get_shallow_commits() is used to determine the cut points at a given depth (i.e. the number of commits in a chain that the user likes to get). However we count current depth up to the commit "commit" but we do the cutting at its parents (i.e. current depth + 1). This makes upload-pack always return one commit more than requested. This patch fixes it. Signed-off-by: NNguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: NJunio C Hamano <gitster@pobox.com>
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- 30 8月, 2010 1 次提交
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由 Thiago Farina 提交于
Signed-off-by: NThiago Farina <tfransosi@gmail.com> Signed-off-by: NJunio C Hamano <gitster@pobox.com>
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- 19 2月, 2008 1 次提交
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由 Martin Koegler 提交于
Signed-off-by: NMartin Koegler <mkoegler@auto.tuwien.ac.at> Signed-off-by: NJunio C Hamano <gitster@pobox.com>
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- 18 2月, 2008 1 次提交
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由 Martin Koegler 提交于
Signed-off-by: NMartin Koegler <mkoegler@auto.tuwien.ac.at> Signed-off-by: NJunio C Hamano <gitster@pobox.com>
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- 07 6月, 2007 1 次提交
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由 Junio C Hamano 提交于
This uses "git-apply --whitespace=strip" to fix whitespace errors that have crept in to our source files over time. There are a few files that need to have trailing whitespaces (most notably, test vectors). The results still passes the test, and build result in Documentation/ area is unchanged. Signed-off-by: NJunio C Hamano <gitster@pobox.com>
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- 22 1月, 2007 1 次提交
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由 Junio C Hamano 提交于
Signed-off-by: NJunio C Hamano <junkio@cox.net>
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- 25 11月, 2006 4 次提交
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由 Alexandre Julliard 提交于
Signed-off-by: NAlexandre Julliard <julliard@winehq.org> Signed-off-by: NJunio C Hamano <junkio@cox.net>
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由 Alexandre Julliard 提交于
Tags should be considered when truncating the commit list. The patch below fixes it, and fetches the right number of commits for each tag. However the correct fix is probably to not fetch historical tags at all. Signed-off-by: NJunio C Hamano <junkio@cox.net>
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由 Johannes Schindelin 提交于
Now, by saying "git fetch -depth <n> <repo>" you can deepen a shallow repository. Signed-off-by: NJohannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: NJunio C Hamano <junkio@cox.net>
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由 Johannes Schindelin 提交于
A shallow commit is a commit which has parents, which in turn are "grafted away", i.e. the commit appears as if it were a root. Since these shallow commits should not be edited by the user, but only by core git, they are recorded in the file $GIT_DIR/shallow. A repository containing shallow commits is called shallow. The advantage of a shallow repository is that even if the upstream contains lots of history, your local (shallow) repository needs not occupy much disk space. The disadvantage is that you might miss a merge base when pulling some remote branch. Signed-off-by: NJohannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: NJunio C Hamano <junkio@cox.net>
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