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| * | | | | | | | | | | | send-pack.c: add --atomic command line argumentRonnie Sahlberg2015-01-07
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This adds support to send-pack to negotiate and use atomic pushes iff the server supports it. Atomic pushes are activated by a new command line flag --atomic. In order to do this we also need to change the semantics for send_pack() slightly. The existing send_pack() function actually doesn't send all the refs back to the server when multiple refs are involved, for example when using --all. Several of the failure modes for pushes can already be detected locally in the send_pack client based on the information from the initial server side list of all the refs as generated by receive-pack. Any such refs that we thus know would fail to push are thus pruned from the list of refs we send to the server to update. For atomic pushes, we have to deal thus with both failures that are detected locally as well as failures that are reported back from the server. In order to do so we treat all local failures as push failures too. We introduce a new status code REF_STATUS_ATOMIC_PUSH_FAILED so we can flag all refs that we would normally have tried to push to the server but we did not due to local failures. This is to improve the error message back to the end user to flag that "these refs failed to update since the atomic push operation failed." Signed-off-by: Ronnie Sahlberg <sahlberg@google.com> Signed-off-by: Stefan Beller <sbeller@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
| * | | | | | | | | | | | send-pack: rename ref_update_to_be_sent to check_to_send_updateStefan Beller2015-01-07
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This renames ref_update_to_be_sent to check_to_send_update and inverts the meaning of the return value. Having the return value inverted we can have different values for the error codes. This is useful in a later patch when we want to know if we hit the CHECK_REF_STATUS_REJECTED case. Signed-off-by: Stefan Beller <sbeller@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
| * | | | | | | | | | | | receive-pack.c: negotiate atomic push supportRonnie Sahlberg2015-01-07
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This adds the atomic protocol option to allow receive-pack to inform the client that it has atomic push capability. This commit makes the functionality introduced in the previous commits go live for the serving side. The changes in documentation reflect the protocol capabilities of the server. Signed-off-by: Stefan Beller <sbeller@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
| * | | | | | | | | | | | receive-pack.c: add execute_commands_atomic functionStefan Beller2015-01-07
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This introduces the new function execute_commands_atomic which will use one atomic transaction for all updates. The default behavior is still the old non atomic way, one ref at a time. This is to cause as little disruption as possible to existing clients. It is unknown if there are client scripts that depend on the old non-atomic behavior so we make it opt-in for now. A later patch will add the possibility to actually use the functionality added by this patch. For now use_atomic is always 0. Inspired-by: Ronnie Sahlberg <sahlberg@google.com> Helped-by: Eric Sunshine <sunshine@sunshineco.com> Signed-off-by: Stefan Beller <sbeller@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
| * | | | | | | | | | | | receive-pack.c: move transaction handling in a central placeStefan Beller2015-01-07
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This moves all code related to transactions into the execute_commands_non_atomic function. This includes beginning and committing the transaction as well as dealing with the errors which may occur during the begin and commit phase of a transaction. No functional changes intended. Helped-by: Eric Sunshine <sunshine@sunshineco.com> Signed-off-by: Stefan Beller <sbeller@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
| * | | | | | | | | | | | receive-pack.c: move iterating over all commands outside execute_commandsStefan Beller2015-01-07
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This commit allows us in a later patch to easily distinguish between the non atomic way to update the received refs and the atomic way which is introduced in a later patch. Signed-off-by: Stefan Beller <sbeller@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
| * | | | | | | | | | | | receive-pack.c: die instead of error in case of possible future bugStefan Beller2015-01-07
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Discussion on the previous patch revealed we rather want to err on the safe side. To do so we need to stop receive-pack in case of the possible future bug when connectivity is not checked on a shallow push. Also while touching that code we considered that removing the reported refs may be harmful in some situations. Sound the message more like a "This Cannot Happen, Please Investigate!" instead of giving advice to remove refs. Suggested-by: Jonathan Nieder <jrnieder@gmail.com> Signed-off-by: Stefan Beller <sbeller@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
| * | | | | | | | | | | | receive-pack.c: shorten the execute_commands loop over all commandsStefan Beller2015-01-07
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Make the main "execute_commands" loop in receive-pack easier to read by splitting out some steps into helper functions. The new helper 'should_process_cmd' checks if a ref update is unnecessary, whether due to an error having occurred or for another reason. The helper 'warn_if_skipped_connectivity_check' warns if we have forgotten to run a connectivity check on a ref which is shallow for the client which would be a bug. This will help us to duplicate less code in a later patch when we make a second copy of the "execute_commands" loop. No functional change intended. Signed-off-by: Stefan Beller <sbeller@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
* | | | | | | | | | | | | Merge branch 'mh/reflog-expire'Junio C Hamano2015-02-11
|\ \ \ \ \ \ \ \ \ \ \ \ \ | |/ / / / / / / / / / / / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Restructure "reflog expire" to fit the reflogs better with the recently updated ref API. Looked reasonable (except that some shortlog entries stood out like a sore thumb). * mh/reflog-expire: (24 commits) refs.c: let fprintf handle the formatting refs.c: don't expose the internal struct ref_lock in the header file lock_any_ref_for_update(): inline function refs.c: remove unlock_ref/close_ref/commit_ref from the refs api reflog_expire(): new function in the reference API expire_reflog(): treat the policy callback data as opaque Move newlog and last_kept_sha1 to "struct expire_reflog_cb" expire_reflog(): move rewrite to flags argument expire_reflog(): move verbose to flags argument expire_reflog(): pass flags through to expire_reflog_ent() struct expire_reflog_cb: a new callback data type Rename expire_reflog_cb to expire_reflog_policy_cb expire_reflog(): move updateref to flags argument expire_reflog(): move dry_run to flags argument expire_reflog(): add a "flags" argument expire_reflog(): extract two policy-related functions Extract function should_expire_reflog_ent() expire_reflog(): use a lock_file for rewriting the reflog file expire_reflog(): return early if the reference has no reflog expire_reflog(): rename "ref" parameter to "refname" ...
| * | | | | | | | | | | | refs.c: let fprintf handle the formattingStefan Beller2014-12-22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Instead of calculating whether to put a plus or minus sign, offload the responsibilty to the fprintf function. Signed-off-by: Stefan Beller <sbeller@google.com> Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu> Signed-off-by: Junio C Hamano <gitster@pobox.com>
| * | | | | | | | | | | | refs.c: don't expose the internal struct ref_lock in the header fileStefan Beller2014-12-22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Now the struct ref_lock is used completely internally, so let's remove it from the header file. Signed-off-by: Stefan Beller <sbeller@google.com> Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu> Signed-off-by: Junio C Hamano <gitster@pobox.com>
| * | | | | | | | | | | | lock_any_ref_for_update(): inline functionMichael Haggerty2014-12-22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Inline the function at its one remaining caller (which is within refs.c) and remove it. Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu> Signed-off-by: Junio C Hamano <gitster@pobox.com>
| * | | | | | | | | | | | refs.c: remove unlock_ref/close_ref/commit_ref from the refs apiRonnie Sahlberg2014-12-22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | unlock|close|commit_ref can be made static since there are no more external callers. Signed-off-by: Ronnie Sahlberg <sahlberg@google.com> Signed-off-by: Stefan Beller <sbeller@google.com> Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu> Signed-off-by: Junio C Hamano <gitster@pobox.com>
| * | | | | | | | | | | | reflog_expire(): new function in the reference APIMichael Haggerty2014-12-22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Move expire_reflog() into refs.c and rename it to reflog_expire(). Turn the three policy functions into function pointers that are passed into reflog_expire(). Add function prototypes and documentation to refs.h. [jc: squashed in $gmane/261582, drop "extern" in function definition] Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu> Reviewed-by: Stefan Beller <sbeller@google.com> Tweaked-by: Ramsay Jones Signed-off-by: Junio C Hamano <gitster@pobox.com>
| * | | | | | | | | | | | expire_reflog(): treat the policy callback data as opaqueMichael Haggerty2014-12-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Now that expire_reflog() doesn't actually look in the expire_reflog_policy_cb data structure, we can make it opaque: * Change the callers of expire_reflog() to pass it a pointer to an entire "struct expire_reflog_policy_cb" rather than a pointer to a "struct cmd_reflog_expire_cb". * Change expire_reflog() to accept the argument as a "void *" and simply pass it through to the policy functions. * Change the policy functions, reflog_expiry_prepare(), reflog_expiry_cleanup(), and should_expire_reflog_ent(), to accept "void *cb_data" arguments and cast them back to "struct expire_reflog_policy_cb" internally. Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu> Reviewed-by: Stefan Beller <sbeller@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
| * | | | | | | | | | | | Move newlog and last_kept_sha1 to "struct expire_reflog_cb"Michael Haggerty2014-12-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | These members are not needed by the policy functions. Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu> Reviewed-by: Stefan Beller <sbeller@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
| * | | | | | | | | | | | expire_reflog(): move rewrite to flags argumentMichael Haggerty2014-12-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The policy objects don't care about "--rewrite". So move it to expire_reflog()'s flags parameter. Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu> Reviewed-by: Stefan Beller <sbeller@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
| * | | | | | | | | | | | expire_reflog(): move verbose to flags argumentMichael Haggerty2014-12-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The policy objects don't care about "--verbose". So move it to expire_reflog()'s flags parameter. Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu> Reviewed-by: Stefan Beller <sbeller@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
| * | | | | | | | | | | | expire_reflog(): pass flags through to expire_reflog_ent()Michael Haggerty2014-12-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add a flags field to "struct expire_reflog_cb", and pass the flags argument through to expire_reflog_ent(). In a moment we will start using it to pass through flags that expire_reflog_ent() needs. Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu> Reviewed-by: Stefan Beller <sbeller@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
| * | | | | | | | | | | | struct expire_reflog_cb: a new callback data typeMichael Haggerty2014-12-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add a new data type, "struct expire_reflog_cb", for holding the data that expire_reflog() passes to expire_reflog_ent() via for_each_reflog_ent(). For now it only holds a pointer to a "struct expire_reflog_policy_cb", which still contains all of the actual data. In future commits we will move some fields from the latter to the former. Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu> Reviewed-by: Stefan Beller <sbeller@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
| * | | | | | | | | | | | Rename expire_reflog_cb to expire_reflog_policy_cbMichael Haggerty2014-12-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This is the first step towards separating the data needed by the policy code from the data needed by the reflog expiration machinery. (In a moment we will add a *new* "struct expire_reflog_cb" for the use of expire_reflog() itself, then move fields selectively from expire_reflog_policy_cb to expire_reflog_cb.) Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu> Reviewed-by: Stefan Beller <sbeller@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
| * | | | | | | | | | | | expire_reflog(): move updateref to flags argumentMichael Haggerty2014-12-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The policy objects don't care about "--updateref". So move it to expire_reflog()'s flags parameter. Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu> Reviewed-by: Stefan Beller <sbeller@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
| * | | | | | | | | | | | expire_reflog(): move dry_run to flags argumentMichael Haggerty2014-12-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The policy objects don't care about "--dry-run". So move it to expire_reflog()'s flags parameter. Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu> Reviewed-by: Stefan Beller <sbeller@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
| * | | | | | | | | | | | expire_reflog(): add a "flags" argumentMichael Haggerty2014-12-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We want to separate the options relevant to the expiry machinery from the options affecting the expiration policy. So add a "flags" argument to expire_reflog() to hold the former. The argument doesn't yet do anything. Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu> Reviewed-by: Stefan Beller <sbeller@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
| * | | | | | | | | | | | expire_reflog(): extract two policy-related functionsMichael Haggerty2014-12-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Extract two functions, reflog_expiry_prepare() and reflog_expiry_cleanup(), from expire_reflog(). This is a further step towards separating the code for deciding on expiration policy from the code that manages the physical deletion of reflog entries. This change requires a couple of local variables from expire_reflog() to be turned into fields of "struct expire_reflog_cb". More reorganization of the callback data will follow in later commits. Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu> Reviewed-by: Stefan Beller <sbeller@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
| * | | | | | | | | | | | Extract function should_expire_reflog_ent()Michael Haggerty2014-12-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Extract from expire_reflog_ent() a function that is solely responsible for deciding whether a reflog entry should be expired. By separating this "business logic" from the mechanics of actually expiring entries, we are working towards the goal of encapsulating reflog expiry within the refs API, with policy decided by a callback function passed to it by its caller. Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu> Signed-off-by: Junio C Hamano <gitster@pobox.com>
| * | | | | | | | | | | | expire_reflog(): use a lock_file for rewriting the reflog fileMichael Haggerty2014-12-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We don't actually need the locking functionality, because we already hold the lock on the reference itself, which is how the reflog file is locked. But the lock_file code can do some of the bookkeeping for us, and it is more careful than the old code here was. For example: * It correctly handles the case that the reflog lock file already exists for some reason or cannot be opened. * It correctly cleans up the lockfile if the program dies. Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu> Signed-off-by: Junio C Hamano <gitster@pobox.com>
| * | | | | | | | | | | | expire_reflog(): return early if the reference has no reflogMichael Haggerty2014-12-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There is very little cleanup needed if the reference has no reflog. If we move the initialization of log_file down a bit, there's even less. So instead of jumping to the cleanup code at the end of the function, just do the cleanup and return inline. Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu> Reviewed-by: Jonathan Nieder <jrnieder@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
| * | | | | | | | | | | | expire_reflog(): rename "ref" parameter to "refname"Michael Haggerty2014-12-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This is our usual convention. Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu> Reviewed-by: Jonathan Nieder <jrnieder@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
| * | | | | | | | | | | | expire_reflog(): it's not an each_ref_fn anymoreMichael Haggerty2014-12-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Prior to v1.5.4~14, expire_reflog() had to be an each_ref_fn because it was passed to for_each_reflog(). Since then, there has been no reason for it to implement the each_ref_fn interface. So... * Remove the "unused" parameter (which took the place of "flags", but was really unused). * Declare the last parameter to be (struct cmd_reflog_expire_cb *) rather than (void *). Helped-by: Jonathan Nieder <jrnieder@gmail.com> Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu> Signed-off-by: Junio C Hamano <gitster@pobox.com>
| * | | | | | | | | | | | refs.c: add a function to append a reflog entry to a fdRonnie Sahlberg2014-12-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Break out the code to create the string and writing it to the file descriptor from log_ref_write and add it into a dedicated function log_ref_write_fd. It is a nice unit of work. For now this is only used from log_ref_write, but in the future it might have other callers. Signed-off-by: Ronnie Sahlberg <sahlberg@google.com> Signed-off-by: Stefan Beller <sbeller@google.com> Reviewed-by: Jonathan Nieder <jrnieder@gmail.com> Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu> Signed-off-by: Junio C Hamano <gitster@pobox.com>
| * | | | | | | | | | | | refs.c: make ref_transaction_delete a wrapper for ref_transaction_updateRonnie Sahlberg2014-12-04
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Signed-off-by: Ronnie Sahlberg <sahlberg@google.com> Signed-off-by: Stefan Beller <sbeller@google.com> Reviewed-by: Michael Haggerty <mhagger@alum.mit.edu> Reviewed-by: Jonathan Nieder <jrnieder@gmail.com> Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu> Signed-off-by: Junio C Hamano <gitster@pobox.com>
| * | | | | | | | | | | | refs.c: make ref_transaction_create a wrapper for ref_transaction_updateRonnie Sahlberg2014-12-04
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The ref_transaction_update function can already be used to create refs by passing null_sha1 as the old_sha1 parameter. Simplify by replacing transaction_create with a thin wrapper. Signed-off-by: Ronnie Sahlberg <sahlberg@google.com> Signed-off-by: Stefan Beller <sbeller@google.com> Reviewed-by: Michael Haggerty <mhagger@alum.mit.edu> Reviewed-by: Jonathan Nieder <jrnieder@gmail.com> Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu> Signed-off-by: Junio C Hamano <gitster@pobox.com>
* | | | | | | | | | | | | Merge branch 'cj/log-invert-grep'Junio C Hamano2015-02-11
|\ \ \ \ \ \ \ \ \ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | "git log --invert-grep --grep=WIP" will show only commits that do not have the string "WIP" in their messages. * cj/log-invert-grep: log: teach --invert-grep option
| * | | | | | | | | | | | | log: teach --invert-grep optionChristoph Junghans2015-01-13
| | |_|_|_|_|_|/ / / / / / | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | "git log --grep=<string>" shows only commits with messages that match the given string, but sometimes it is useful to be able to show only commits that do *not* have certain messages (e.g. "show me ones that are not FIXUP commits"). Originally, we had the invert-grep flag in grep_opt, but because "git grep --invert-grep" does not make sense except in conjunction with "--files-with-matches", which is already covered by "--files-without-matches", it was moved it to revisions structure. To have the flag there expresses the function to the feature better. When the newly inserted two tests run, the history would have commits with messages "initial", "second", "third", "fourth", "fifth", "sixth" and "Second", committed in this order. The commits that does not match either "th" or "Sec" is "second" and "initial". For the case insensitive case only "initial" matches. Signed-off-by: Christoph Junghans <ottxor@gentoo.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
* | | | | | | | | | | | | Merge branch 'km/gettext-n'Junio C Hamano2015-02-11
|\ \ \ \ \ \ \ \ \ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * km/gettext-n: gettext.h: add parentheses around N_ expansion if supported
| * | | | | | | | | | | | | gettext.h: add parentheses around N_ expansion if supportedKyle J. McKay2015-01-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The gettext N_ macro is used to mark strings for translation without actually translating them. At runtime the string is expected to be passed to the gettext API for translation. If two N_ macro invocations appear next to each other with only whitespace (or nothing at all) between them, the two separate strings will be marked for translation, but the preprocessor will then silently combine the strings into one and at runtime the string passed to gettext will not match the strings that were translated so no translation will actually occur. Avoid this by adding parentheses around the expansion of the N_ macro so that instead of ending up with two adjacent strings that are then combined by the preprocessor, two adjacent strings surrounded by parentheses result instead which causes a compile error so the mistake can be quickly found and corrected. However, since these string literals are typically assigned to static variables and not all compilers support parenthesized string literal assignments, allow this to be controlled by the Makefile with the default only enabled when the compiler is known to support the syntax. For now only __GNUC__ enables this by default which covers both gcc and clang which should result in early detection of any adjacent N_ macros. Although the necessary tests make the affected files a bit less elegant, the benefit of avoiding propagation of a translation- marking error to all the translation teams thus creating extra work for them when the error is eventually detected and fixed would seem to outweigh the minor inelegance the additional configuration tests introduce. Helped-by: Junio C Hamano <gitster@pobox.com> Signed-off-by: Kyle J. McKay <mackyle@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
* | | | | | | | | | | | | | Merge branch 'bc/http-fallback-to-password-after-krb-fails'Junio C Hamano2015-02-11
|\ \ \ \ \ \ \ \ \ \ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | After attempting and failing a password-less authentication (e.g. kerberos), libcURL refuses to fall back to password based Basic authentication without a bit of help/encouragement. * bc/http-fallback-to-password-after-krb-fails: remote-curl: fall back to Basic auth if Negotiate fails
| * | | | | | | | | | | | | | remote-curl: fall back to Basic auth if Negotiate failsbrian m. carlson2015-01-07
| |/ / / / / / / / / / / / / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Apache servers using mod_auth_kerb can be configured to allow the user to authenticate either using Negotiate (using the Kerberos ticket) or Basic authentication (using the Kerberos password). Often, one will want to use Negotiate authentication if it is available, but fall back to Basic authentication if the ticket is missing or expired. However, libcurl will try very hard to use something other than Basic auth, even over HTTPS. If Basic and something else are offered, libcurl will never attempt to use Basic, even if the other option fails. Teach the HTTP client code to stop trying authentication mechanisms that don't use a password (currently Negotiate) after the first failure, since if they failed the first time, they will never succeed. Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net> Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
* | | | | | | | | | | | | | Merge branch 'dk/format-patch-ignore-diff-submodule'Junio C Hamano2015-02-11
|\ \ \ \ \ \ \ \ \ \ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Setting diff.submodule to 'log' made "git format-patch" produce broken patches. * dk/format-patch-ignore-diff-submodule: format-patch: ignore diff.submodule setting t4255: test am submodule with diff.submodule
| * | | | | | | | | | | | | | format-patch: ignore diff.submodule settingDoug Kelly2015-01-07
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | diff.submodule when set to log produces output which git-am cannot handle. Ignore this setting when generating patch output. Signed-off-by: Doug Kelly <dougk.ff7@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
| * | | | | | | | | | | | | | t4255: test am submodule with diff.submoduleDoug Kelly2015-01-07
| |/ / / / / / / / / / / / / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git am will break when using diff.submodule=log; add some test cases to illustrate this breakage as simply as possible. There are currently two ways this can fail: * With errors ("unrecognized input"), if only change * Silently (no submodule change), if other files change Test for both conditions and ensure without diff.submodule this works. Helped-by: Eric Sunshine <sunshine@sunshineco.com> Helped-by: Junio C Hamano <gitster@pobox.com> Signed-off-by: Doug Kelly <dougk.ff7@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
* | | | | | | | | | | | | | Merge branch 'jn/rerere-fail-on-auto-update-failure'Junio C Hamano2015-02-11
|\ \ \ \ \ \ \ \ \ \ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | "git rerere" (invoked internally from many mergy operations) did not correctly signal errors when told to update the working tree files and failed to do so for whatever reason. * jn/rerere-fail-on-auto-update-failure: rerere: error out on autoupdate failure
| * | | | | | | | | | | | | | rerere: error out on autoupdate failureJonathan Nieder2015-01-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We have been silently tolerating errors by returning early with an error that the caller ignores since rerere.autoupdate was introduced in v1.6.0-rc0~120^2 (2008-06-22). So on error (for example if the index is already locked), rerere can return success silently without updating the index or with only some items in the index updated. Better to treat such failures as a fatal error so the operator can figure out what is wrong and fix it. Signed-off-by: Jonathan Nieder <jrnieder@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
* | | | | | | | | | | | | | | Merge branch 'jk/blame-commit-label'Junio C Hamano2015-02-11
|\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | "git blame HEAD -- missing" failed to correctly say "HEAD" when it tried to say "No such path 'missing' in HEAD". * jk/blame-commit-label: blame.c: fix garbled error message use xstrdup_or_null to replace ternary conditionals builtin/commit.c: use xstrdup_or_null instead of envdup builtin/apply.c: use xstrdup_or_null instead of null_strdup git-compat-util: add xstrdup_or_null helper
| * | | | | | | | | | | | | | | blame.c: fix garbled error messageLukas Fleischer2015-01-13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The helper functions prepare_final() and prepare_initial() return a pointer to a string that is a member of an object in the revs->pending array. This array is later rebuilt when running prepare_revision_walk() which potentially transforms the pointer target into a bogus string. Fix this by maintaining a copy of the original string. Signed-off-by: Lukas Fleischer <git@cryptocrack.de> Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
| * | | | | | | | | | | | | | | use xstrdup_or_null to replace ternary conditionalsJeff King2015-01-13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This replaces "x ? xstrdup(x) : NULL" with xstrdup_or_null(x). The change is fairly mechanical, with the exception of resolve_refdup, which can eliminate a temporary variable. There are still a few hits grepping for "?.*xstrdup", but these are of slightly different forms and cannot be converted (e.g., "x ? xstrdup(x->foo) : NULL"). Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
| * | | | | | | | | | | | | | | builtin/commit.c: use xstrdup_or_null instead of envdupJeff King2015-01-13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The only reason for envdup to be its own function is that we have to save the result in a temporary string. With xstrdup_or_null, we can feed the result of getenv() directly. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
| * | | | | | | | | | | | | | | builtin/apply.c: use xstrdup_or_null instead of null_strdupJeff King2015-01-13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This file had its own identical helper that predates xstrdup_or_null. Let's use the global one to avoid repetition. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
| * | | | | | | | | | | | | | | git-compat-util: add xstrdup_or_null helperJeff King2015-01-13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | It's a common idiom to duplicate a string if it is non-NULL, or pass a literal NULL through. This is already a one-liner in C, but you do have to repeat the name of the string twice. So if there's a function call, you must write: const char *x = some_fun(...); return x ? xstrdup(x) : NULL; instead of (with this patch) just: return xstrdup_or_null(some_fun(...)); Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>