- 02 5月, 2013 33 次提交
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由 Michael Haggerty 提交于
Hold the ref_cache instance for the main repository in a dedicated, statically-allocated instance to avoid the need for a function call and a linked-list traversal when it is needed. Suggested by: Heiko Voigt <hvoigt@hvoigt.net> Signed-off-by: NMichael Haggerty <mhagger@alum.mit.edu> Signed-off-by: NJunio C Hamano <gitster@pobox.com>
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由 Michael Haggerty 提交于
Change the callers convert submodule names into ref_cache pointers. Signed-off-by: NMichael Haggerty <mhagger@alum.mit.edu> Signed-off-by: NJunio C Hamano <gitster@pobox.com>
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由 Michael Haggerty 提交于
Signed-off-by: NMichael Haggerty <mhagger@alum.mit.edu> Signed-off-by: NJunio C Hamano <gitster@pobox.com>
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由 Michael Haggerty 提交于
Change pack_refs() to work with a file descriptor instead of a FILE* (making the file-locking code less awkward) and use write_packed_entry() to do the writing. Signed-off-by: NMichael Haggerty <mhagger@alum.mit.edu> Signed-off-by: NJunio C Hamano <gitster@pobox.com>
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由 Michael Haggerty 提交于
Change pack_one_ref() to call peel_entry() rather than using its own code for peeling references. Aside from sharing code, this lets it take advantage of the optimization introduced by 6c4a060d. Please note that we *could* use any peeled values that happen to already be stored in the ref_entries, which would avoid some object lookups for references that were already packed. But doing so would also propagate any peeling errors across runs of "git pack-refs" and give no way to recover from such errors. And "git pack-refs" isn't run often enough that the performance cost is a problem. So instead, add a new option to peel_entry() to force the entry to be re-peeled, and call it with that option set. Signed-off-by: NMichael Haggerty <mhagger@alum.mit.edu> Signed-off-by: NJunio C Hamano <gitster@pobox.com>
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由 Michael Haggerty 提交于
Function do_not_prune() was redundantly checking REF_ISSYMREF, which was already tested at the top of pack_one_ref(), so remove that check. And the rest was trivial, so inline the function. Signed-off-by: NMichael Haggerty <mhagger@alum.mit.edu> Signed-off-by: NJunio C Hamano <gitster@pobox.com>
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由 Michael Haggerty 提交于
pack_refs() was not using any of the extra features of for_each_ref(), so change it to use do_for_each_entry(). This also gives it access to the ref_entry and in particular its peeled field, which will be taken advantage of in the next commit. Signed-off-by: NMichael Haggerty <mhagger@alum.mit.edu> Signed-off-by: NJunio C Hamano <gitster@pobox.com>
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由 Michael Haggerty 提交于
Use a single struct lock_file for both pack_refs() and repack_without_ref(). Signed-off-by: NMichael Haggerty <mhagger@alum.mit.edu> Signed-off-by: NJunio C Hamano <gitster@pobox.com>
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由 Michael Haggerty 提交于
Make this function conform to the naming convention established in 65385ef7 for the rest of the refs.c file. Signed-off-by: NMichael Haggerty <mhagger@alum.mit.edu> Signed-off-by: NJunio C Hamano <gitster@pobox.com>
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由 Michael Haggerty 提交于
pack-refs.c doesn't contain much code, and the code it does contain is closely related to reference handling. Moreover, there is some duplication between pack_refs() and repack_without_ref(). Therefore, merge pack-refs.c into refs.c and pack-refs.h into refs.h. The code duplication will be addressed in future commits. Signed-off-by: NMichael Haggerty <mhagger@alum.mit.edu> Signed-off-by: NJunio C Hamano <gitster@pobox.com>
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由 Michael Haggerty 提交于
This code is about to be moved, so name the function more distinctively. Signed-off-by: NMichael Haggerty <mhagger@alum.mit.edu> Signed-off-by: NJunio C Hamano <gitster@pobox.com>
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由 Michael Haggerty 提交于
Extract the I/O code from the "business logic" in repack_ref_fn(). Later there will be another caller for this function. Signed-off-by: NMichael Haggerty <mhagger@alum.mit.edu> Signed-off-by: NJunio C Hamano <gitster@pobox.com>
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由 Michael Haggerty 提交于
When a reference that existed in the packed-refs file is deleted, the packed-refs file must be rewritten. Previously, the file was rewritten without any peeled refs, even if the file contained peeled refs when it was read. This was not a bug, because the packed-refs file header didn't claim that the file contained peeled values. But it had a performance cost, because the repository would lose the benefit of having precomputed peeled references until pack-refs was run again. Teach repack_without_ref() to write peeled refs to the packed-refs file (regardless of whether they were present in the old version of the file). This means that if the old version of the packed-refs file was not fully peeled, then repack_without_ref() will have to peel references. To avoid the expense of reading lots of loose references, we take two shortcuts relative to pack-refs: * If the peeled value of a reference is already known (i.e., because it was read from the old version of the packed-refs file), then output that peeled value again without any checks. This is the usual code path and should avoid any noticeable overhead. (This is different than pack-refs, which always re-peels references.) * We don't verify that the packed ref is still current. It could be that a packed references is overridden by a loose reference, in which case the packed ref is no longer needed and might even refer to an object that has been garbage collected. But we don't check; instead, we just try to peel all references. If peeling is successful, the peeled value is written out (even though it might not be needed any more); if not, then the reference is silently omitted from the output. The extra overhead of peeling references in repack_without_ref() should only be incurred the first time the packed-refs file is written by a version of Git that knows about the "fully-peeled" attribute. Signed-off-by: NMichael Haggerty <mhagger@alum.mit.edu> Signed-off-by: NJunio C Hamano <gitster@pobox.com>
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由 Michael Haggerty 提交于
Add a test that demonstrates that the peeled values recorded in packed-refs are lost if a packed ref is deleted. (The code in repack_without_ref() doesn't even attempt to write peeled refs.) This will be fixed in a moment. Signed-off-by: NMichael Haggerty <mhagger@alum.mit.edu> Signed-off-by: NJunio C Hamano <gitster@pobox.com>
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由 Michael Haggerty 提交于
Add a function remove_ref(), which removes a single entry from a reference cache. Use this function to reimplement repack_without_ref(). The old version iterated over all refs, packing all of them except for the one to be deleted, then discarded the entire packed reference cache. The new version deletes the doomed reference from the cache *before* iterating. This has two advantages: * the code for writing packed-refs becomes simpler, because it doesn't have to exclude one of the references. * it is no longer necessary to discard the packed refs cache after deleting a reference: symbolic refs cannot be packed, so packed references cannot depend on each other, so the rest of the packed refs cache remains valid after a reference is deleted. Signed-off-by: NMichael Haggerty <mhagger@alum.mit.edu> Signed-off-by: NJunio C Hamano <gitster@pobox.com>
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由 Michael Haggerty 提交于
Change search_ref_dir() to return the index of the sought entry (or -1 on error) rather than a pointer to the entry. This will make it more natural to use the function for removing an entry from the list. Signed-off-by: NMichael Haggerty <mhagger@alum.mit.edu> Signed-off-by: NJunio C Hamano <gitster@pobox.com>
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由 Michael Haggerty 提交于
Stop emitting an error message when deleting a packed reference if we find another dangling packed reference that is overridden by a loose reference. See the previous commit for a longer explanation of the issue. We have to be careful to make sure that the invalid packed reference really *is* overridden by a loose reference; otherwise what we have found is repository corruption, which we *should* report. Please note that this approach is vulnerable to a race condition similar to the race conditions already known to affect packed references [1]: * Process 1 tries to peel packed reference X as part of deleting another packed reference. It discovers that X does not refer to a valid object (because the object that it referred to has been garbage collected). * Process 2 tries to delete reference X. It starts by deleting the loose reference X. * Process 1 checks whether there is a loose reference X. There is not (it has just been deleted by process 2), so process 1 reports a spurious error "X does not point to a valid object!" The worst case seems relatively harmless, and the fix is identical to the fix that will be needed for the other race conditions (namely holding a lock on the packed-refs file during *all* reference deletions), so we leave the cleaning up of all of them as a future project. [1] http://thread.gmane.org/gmane.comp.version-control.git/211956Signed-off-by: NMichael Haggerty <mhagger@alum.mit.edu> Signed-off-by: NJunio C Hamano <gitster@pobox.com>
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由 Michael Haggerty 提交于
A packed reference can be overridden by a loose reference, in which case the packed reference is obsolete and is never used. The object pointed to by such a reference can be garbage collected. Since d66da478, this could lead to the emission of a spurious error message: error: refs/heads/master does not point to a valid object! The error is generated by repack_without_ref() if there is an obsolete dangling packed reference in packed-refs when the packed-refs file has to be rewritten due to the deletion of another packed reference. Add a failing test demonstrating this problem and some passing tests of related scenarios. Signed-off-by: NMichael Haggerty <mhagger@alum.mit.edu> Signed-off-by: NJunio C Hamano <gitster@pobox.com>
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由 Michael Haggerty 提交于
Establish an internal API for iterating over references, which gives the callback functions direct access to the ref_entry structure describing the reference. (Do not change the iteration API that is exposed outside of the module.) Define a new internal callback signature int each_ref_entry_fn(struct ref_entry *entry, void *cb_data) Change do_for_each_ref_in_dir() and do_for_each_ref_in_dirs() to accept each_ref_entry_fn callbacks, and rename them to do_for_each_entry_in_dir() and do_for_each_entry_in_dirs(), respectively. Adapt their callers accordingly. Add a new function do_for_each_entry() analogous to do_for_each_ref() but using the new callback style. Change do_one_ref() into an each_ref_entry_fn that does some bookkeeping and then calls a wrapped each_ref_fn. Reimplement do_for_each_ref() in terms of do_for_each_entry(), using do_one_ref() as an adapter. Please note that the responsibility for setting current_ref remains in do_one_ref(), which means that current_ref is *not* set when iterating over references via the new internal API. This is not a disadvantage, because current_ref is not needed by callers of the internal API (they receive a pointer to the current ref_entry anyway). But more importantly, this change prevents peel_ref() from returning invalid results in the following scenario: When iterating via the external API, the iteration always includes both packed and loose references, and in particular never presents a packed ref if there is a loose ref with the same name. The internal API, on the other hand, gives the option to iterate over only the packed references. During such an iteration, there is no check whether the packed ref might be hidden by a loose ref of the same name. But until now the packed ref was recorded in current_ref during the iteration. So if peel_ref() were called with the reference name corresponding to current ref, it would return the peeled version of the packed ref even though there might be a loose ref that peels to a different value. This scenario doesn't currently occur in the code, but fix it to prevent things from breaking in a very confusing way in the future. Signed-off-by: NMichael Haggerty <mhagger@alum.mit.edu> Signed-off-by: NJunio C Hamano <gitster@pobox.com>
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由 Michael Haggerty 提交于
Peel the entry, and as a side effect store the peeled value in the entry. Use this function from two places in peel_ref(); a third caller will be added soon. Please note that this change can lead to ref_entries for unpacked refs being peeled. This has no practical benefit but is harmless. Signed-off-by: NMichael Haggerty <mhagger@alum.mit.edu> Signed-off-by: NJunio C Hamano <gitster@pobox.com>
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由 Michael Haggerty 提交于
The old version was inconsistent: when a reference was REF_KNOWS_PEELED but with a null peeled value, it returned non-zero for the current reference but zero for other references. Change the behavior for non-current references to match that of current_ref, which is what callers expect. Document the behavior. Current callers only call peel_ref() from within a for_each_ref-style iteration and only for the current ref; therefore, the buggy code path was never reached. Signed-off-by: NMichael Haggerty <mhagger@alum.mit.edu> Signed-off-by: NJunio C Hamano <gitster@pobox.com>
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由 Michael Haggerty 提交于
Instead of just returning a success/failure bit, return an enumeration value that explains the reason for any failure. This will come in handy shortly. Signed-off-by: NMichael Haggerty <mhagger@alum.mit.edu> Signed-off-by: NJunio C Hamano <gitster@pobox.com>
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由 Michael Haggerty 提交于
It is a nice, logical unit of work, and putting it in a function removes the need to use a goto in peel_ref(). Soon it will also have other uses. The algorithm is unchanged. Signed-off-by: NMichael Haggerty <mhagger@alum.mit.edu> Signed-off-by: NJunio C Hamano <gitster@pobox.com>
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由 Michael Haggerty 提交于
It is a nice unit of work and soon will be needed from multiple locations. Signed-off-by: NMichael Haggerty <mhagger@alum.mit.edu> Signed-off-by: NJunio C Hamano <gitster@pobox.com>
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由 Michael Haggerty 提交于
Signed-off-by: NMichael Haggerty <mhagger@alum.mit.edu> Signed-off-by: NJunio C Hamano <gitster@pobox.com>
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由 Michael Haggerty 提交于
Signed-off-by: NMichael Haggerty <mhagger@alum.mit.edu> Signed-off-by: NJunio C Hamano <gitster@pobox.com>
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由 Michael Haggerty 提交于
Instead of copying the reference's SHA1 into a caller-supplied variable, just return the ref_entry itself (or NULL if there is no such entry). This change will allow the function to be used from elsewhere. Signed-off-by: NMichael Haggerty <mhagger@alum.mit.edu> Signed-off-by: NJunio C Hamano <gitster@pobox.com>
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由 Michael Haggerty 提交于
There is no way to drop out of the while loop. This code has been dead since 432ad41e. Signed-off-by: NMichael Haggerty <mhagger@alum.mit.edu> Signed-off-by: NJunio C Hamano <gitster@pobox.com>
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由 Michael Haggerty 提交于
Signed-off-by: NMichael Haggerty <mhagger@alum.mit.edu> Signed-off-by: NJunio C Hamano <gitster@pobox.com>
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由 Michael Haggerty 提交于
Signed-off-by: NMichael Haggerty <mhagger@alum.mit.edu> Signed-off-by: NJunio C Hamano <gitster@pobox.com>
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由 Michael Haggerty 提交于
Signed-off-by: NMichael Haggerty <mhagger@alum.mit.edu> Signed-off-by: NJunio C Hamano <gitster@pobox.com>
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由 Michael Haggerty 提交于
Signed-off-by: NMichael Haggerty <mhagger@alum.mit.edu> Signed-off-by: NJunio C Hamano <gitster@pobox.com>
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由 Michael Haggerty 提交于
Document the bits that can appear in the "flags" parameter passed to an each_ref_function and/or in the ref_entry::flag field. Signed-off-by: NMichael Haggerty <mhagger@alum.mit.edu> Signed-off-by: NJunio C Hamano <gitster@pobox.com>
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- 26 4月, 2013 1 次提交
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由 Junio C Hamano 提交于
Earlier we added support for --expire=all (or --expire=now) that considers all crufts, regardless of their age, as eligible for garbage collection by turning command argument parsers that use approxidate() to use parse_expiry_date(), but "git prune" used a built-in parse-options facility OPT_DATE() and did not benefit from the new function. Signed-off-by: NJunio C Hamano <gitster@pobox.com>
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- 19 4月, 2013 2 次提交
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由 Michael Haggerty 提交于
Document that the "no-" prefix can also be used for non-boolean options. Signed-off-by: NMichael Haggerty <mhagger@alum.mit.edu> Signed-off-by: NJunio C Hamano <gitster@pobox.com>
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由 Michael Haggerty 提交于
Document the new values that can be used for expiry values where their use makes sense: * git reflog expire --expire=[all|never] * git reflog expire --expire-unreachable=[all|never] * git gc --prune=all Other combinations aren't useful and therefore no documentation is added (even though they are allowed): * git gc --prune=never is redundant with "git gc --no-prune" * git prune --expire=all is equivalent to providing no --expire option * git prune --expire=never is a NOP Signed-off-by: NMichael Haggerty <mhagger@alum.mit.edu> Signed-off-by: NJunio C Hamano <gitster@pobox.com>
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- 18 4月, 2013 1 次提交
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由 Junio C Hamano 提交于
"git reflog --expire=all" tries to expire reflog entries up to the current second, because the approxidate() parser gives the current timestamp for anything it does not understand (and it does not know what time "all" means). When the user tells us to expire "all" (or set the expiration time to "now"), the user wants to remove all the reflog entries (no reflog entry should record future time). Just set it to ULONG_MAX and to let everything that is older that timestamp expire. While at it, allow "now" to be treated the same way for callers that parse expiry date timestamp with this function. Also use an error reporting version of approxidate() to report misspelled date. When the user says e.g. "--expire=mnoday" to delete entries two days or older on Wednesday, we wouldn't want the "unknown, default to now" logic to kick in. Signed-off-by: NJunio C Hamano <gitster@pobox.com>
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- 13 4月, 2013 2 次提交
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由 Paul Price 提交于
The --signed-tags argument is plural, while error messages referred to --signed-tag (singular). Tweak error messages to correspond to the argument. Signed-off-by: NPaul Price <price@astro.princeton.edu> Signed-off-by: NJunio C Hamano <gitster@pobox.com>
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由 Stefan Saasen 提交于
eb32d236 introduced the OBJ_OFS_DELTA object that uses a relative offset to identify the base object instead of the 20-byte SHA1 reference. The pack file documentation only mentions the SHA1 based reference in its description of the deltified object entry. Update the pack format documentation to clarify that the deltified object representation refers to its base using either a relative negative offset or the absolute SHA1 identifier. Signed-off-by: NStefan Saasen <ssaasen@atlassian.com> Signed-off-by: NJunio C Hamano <gitster@pobox.com>
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- 07 4月, 2013 1 次提交
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由 Junio C Hamano 提交于
Signed-off-by: NJunio C Hamano <gitster@pobox.com>
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