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2015-03-17Merge branch 'rs/deflate-init-cleanup'Libravatar Junio C Hamano1-3/+0
Code simplification. * rs/deflate-init-cleanup: zlib: initialize git_zstream in git_deflate_init{,_gzip,_raw}
2015-03-05zlib: initialize git_zstream in git_deflate_init{,_gzip,_raw}Libravatar René Scharfe1-3/+0
Clear the git_zstream variable at the start of git_deflate_init() etc. so that callers don't have to do that. Signed-off-by: Rene Scharfe <l.s.r@web.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-03-05Merge branch 'mh/refs-have-new'Libravatar Junio C Hamano1-3/+3
Simplify the ref transaction API around how "the ref should be pointing at this object" is specified. * mh/refs-have-new: refs.h: remove duplication in function docstrings update_ref(): improve documentation ref_transaction_verify(): new function to check a reference's value ref_transaction_delete(): check that old_sha1 is not null_sha1 ref_transaction_create(): check that new_sha1 is valid commit: avoid race when creating orphan commits commit: add tests of commit races ref_transaction_delete(): remove "have_old" parameter ref_transaction_update(): remove "have_old" parameter struct ref_update: move "have_old" into "flags" refs.c: change some "flags" to "unsigned int" refs: remove the gap in the REF_* constant values refs: move REF_DELETING to refs.c
2015-02-25Merge branch 'jk/fast-import-die-nicely-fix'Libravatar Junio C Hamano1-1/+5
"git fast-import" used to crash when it could not close and conclude the resulting packfile cleanly. * jk/fast-import-die-nicely-fix: fast-import: avoid running end_packfile recursively
2015-02-17ref_transaction_update(): remove "have_old" parameterLibravatar Michael Haggerty1-3/+3
Instead, verify the reference's old value if and only if old_sha1 is non-NULL. ref_transaction_delete() will get the same treatment in a moment. 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>
2015-02-10fast-import: avoid running end_packfile recursivelyLibravatar Jeff King1-1/+5
When an import has finished, we run end_packfile() to finalize the data and move the packfile into place. If this process fails, we call die() and end up in our die_nicely() handler. Which unfortunately includes running end_packfile to save any progress we made. We enter the function again, and start operating on the pack_data struct while it is in an inconsistent state, leading to a segfault. One way to trigger this is to simply start two identical fast-imports at the same time. They will both create the same packfiles, which will then try to create identically named ".keep" files. One will win the race, and the other will die(), and end up with the segfault. Since 3c078b9, we already reset the pack_data pointer to NULL at the end of end_packfile. That covers the case of us calling die() right after end_packfile, before we have reinitialized the pack_data pointer. This new problem is quite similar, except that we are worried about calling die() _during_ end_packfile, not right after. Ideally we would simply set pack_data to NULL as soon as we enter the function, and operate on a copy of the pointer. Unfortunately, it is not so easy. pack_data is a global, and end_packfile calls into other functions which operate on the global directly. We would have to teach each of these to take an argument, and there is no guarantee that we would catch all of the spots. Instead, we can simply use a static flag to avoid recursively entering the function. This is a little less elegant, but it's short and fool-proof. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-10-15refs.c: pass the ref log message to _create/delete/update instead of _commitLibravatar Ronnie Sahlberg1-4/+4
Change the ref transaction API so that we pass the reflog message to the create/delete/update functions instead of to ref_transaction_commit. This allows different reflog messages for each ref update in a multi-ref transaction. Signed-off-by: Ronnie Sahlberg <sahlberg@google.com> Signed-off-by: Jonathan Nieder <jrnieder@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-10-01dump_marks(): reimplement using fdopen_lock_file()Libravatar Michael Haggerty1-19/+2
Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-10-01lockfile.h: extract new header file for the functions in lockfile.cLibravatar Michael Haggerty1-0/+1
Move the interface declaration for the functions in lockfile.c from cache.h to a new file, lockfile.h. Add #includes where necessary (and remove some redundant includes of cache.h by files that already include builtin.h). Move the documentation of the lock_file state diagram from lockfile.c to the new header file. Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-10-01dump_marks(): remove a redundant call to rollback_lock_file()Libravatar Michael Haggerty1-3/+1
When commit_lock_file() fails, it now always calls rollback_lock_file() internally, so there is no need to call that function here. 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>
2014-09-29Merge branch 'mb/fast-import-delete-root' into maintLibravatar Junio C Hamano1-1/+5
An attempt to remove the entire tree in the "git fast-import" input stream caused it to misbehave. * mb/fast-import-delete-root: fast-import: fix segfault in store_tree() t9300: test filedelete command
2014-09-26Merge branch 'rs/realloc-array'Libravatar Junio C Hamano1-1/+1
Code cleanup. * rs/realloc-array: use REALLOC_ARRAY for changing the allocation size of arrays add macro REALLOC_ARRAY
2014-09-19Merge branch 'jk/fast-import-fixes' into maintLibravatar Junio C Hamano1-8/+13
* jk/fast-import-fixes: fast-import: fix buffer overflow in dump_tags fast-import: clean up pack_data pointer in end_packfile
2014-09-19Merge branch 'mb/fast-import-delete-root'Libravatar Junio C Hamano1-1/+5
An attempt to remove the entire tree in the "git fast-import" input stream caused it to misbehave. * mb/fast-import-delete-root: fast-import: fix segfault in store_tree() t9300: test filedelete command
2014-09-19Merge branch 'jk/commit-author-parsing'Libravatar Junio C Hamano1-11/+9
Code clean-up. * jk/commit-author-parsing: determine_author_info(): copy getenv output determine_author_info(): reuse parsing functions date: use strbufs in date-formatting functions record_author_date(): use find_commit_header() record_author_date(): fix memory leak on malformed commit commit: provide a function to find a header in a buffer
2014-09-18use REALLOC_ARRAY for changing the allocation size of arraysLibravatar René Scharfe1-1/+1
Signed-off-by: Rene Scharfe <l.s.r@web.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-09-11Merge branch 'jk/fast-import-fixes'Libravatar Junio C Hamano1-4/+7
With sufficiently long refnames, fast-import could have overflown an on-stack buffer. * jk/fast-import-fixes: fast-import: fix buffer overflow in dump_tags fast-import: clean up pack_data pointer in end_packfile
2014-09-11Merge branch 'rs/ref-transaction-1'Libravatar Junio C Hamano1-16/+38
The second batch of the transactional ref update series. * rs/ref-transaction-1: (22 commits) update-ref --stdin: pass transaction around explicitly update-ref --stdin: narrow scope of err strbuf refs.c: make delete_ref use a transaction refs.c: make prune_ref use a transaction to delete the ref refs.c: remove lock_ref_sha1 refs.c: remove the update_ref_write function refs.c: remove the update_ref_lock function refs.c: make lock_ref_sha1 static walker.c: use ref transaction for ref updates fast-import.c: use a ref transaction when dumping tags receive-pack.c: use a reference transaction for updating the refs refs.c: change update_ref to use a transaction branch.c: use ref transaction for all ref updates fast-import.c: change update_branch to use ref transactions sequencer.c: use ref transactions for all ref updates commit.c: use ref transactions for updates replace.c: use the ref transaction functions for updates tag.c: use ref transactions when doing updates refs.c: add transaction.status and track OPEN/CLOSED refs.c: make ref_transaction_begin take an err argument ...
2014-09-03fast-import.c: use a ref transaction when dumping tagsLibravatar Ronnie Sahlberg1-6/+23
Signed-off-by: Ronnie Sahlberg <sahlberg@google.com> Reviewed-by: Michael Haggerty <mhagger@alum.mit.edu> Signed-off-by: Jonathan Nieder <jrnieder@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-09-03fast-import.c: change update_branch to use ref transactionsLibravatar Ronnie Sahlberg1-10/+15
Change update_branch() to use ref transactions for updates. Signed-off-by: Ronnie Sahlberg <sahlberg@google.com> Reviewed-by: Michael Haggerty <mhagger@alum.mit.edu> Signed-off-by: Jonathan Nieder <jrnieder@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-08-29fast-import: fix segfault in store_tree()Libravatar Maxim Bublis1-1/+5
Branch tree is NULLified by filedelete command if we are trying to delete root tree. Add sanity check and use load_tree() in that case. Signed-off-by: Maxim Bublis <satori@yandex-team.ru> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-08-27date: use strbufs in date-formatting functionsLibravatar Jeff King1-11/+9
Many of the date functions write into fixed-size buffers. This is a minor pain, as we have to take special precautions, and frequently end up copying the result into a strbuf or heap-allocated buffer anyway (for which we sometimes use strcpy!). Let's instead teach parse_date, datestamp, etc to write to a strbuf. The obvious downside is that we might need to perform a heap allocation where we otherwise would not need to. However, it turns out that the only two new allocations required are: 1. In test-date.c, where we don't care about efficiency. 2. In determine_author_info, which is not performance critical (and where the use of a strbuf will help later refactoring). Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-08-25fast-import: fix buffer overflow in dump_tagsLibravatar Jeff King1-4/+6
When creating a new annotated tag, we sprintf the refname into a static-sized buffer. If we have an absurdly long tagname, like: git init repo && cd repo && git commit --allow-empty -m foo && git tag -m message mytag && git fast-export mytag | perl -lpe '/^tag/ and s/mytag/"a" x 8192/e' | git fast-import <input we'll overflow the buffer. We can fix it by using a strbuf. Signed-off-by: Jeff King <peff@peff.net> Reviewed-by: Michael Haggerty <mhagger@alum.mit.edu> Reviewed-by: Ronnie Sahlberg <sahlberg@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-08-25fast-import: clean up pack_data pointer in end_packfileLibravatar Jeff King1-4/+7
We have a global pointer pack_data pointing to the current pack we have open. Inside end_packfile we have two new pointers, old_p and new_p. The latter points to pack_data, and the former points to the new "installed" version of the packfile we get when we hand the file off to the regular sha1_file machinery. When then free old_p. Presumably the extra old_p pointer was there so that we could overwrite pack_data with new_p and still free old_p, but we don't do that. We just leave pack_data pointing to bogus memory, and don't overwrite it until we call start_packfile again (if ever). This can cause problems for our die routine, which calls end_packfile to clean things up. If we die at the wrong moment, we can end up looking at invalid memory in pack_data left after the last end_packfile(). Instead, let's make sure we set pack_data to NULL after we free it, and make calling endfile() again with a NULL pack_data a noop (there is nothing to end). We can further make things less confusing by dropping old_p entirely, and moving new_p closer to its point of use. Signed-off-by: Jeff King <peff@peff.net> Reviewed-by: Ronnie Sahlberg <sahlberg@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-08-13fast-import.c: replace `git_config()` with `git_config_get_*()` familyLibravatar Tanay Abhra1-23/+21
Use `git_config_get_*()` family instead of `git_config()` to take advantage of the config-set API which provides a cleaner control flow. Signed-off-by: Tanay Abhra <tanayabh@gmail.com> Reviewed-by: Matthieu Moy <Matthieu.Moy@imag.fr> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-07-18fast-import: use hashcmp() for SHA1 hash comparisonLibravatar René Scharfe1-1/+1
Signed-off-by: Rene Scharfe <l.s.r@web.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-06-20fast-import: refactor parsing of spacesLibravatar Jeff King1-13/+7
When we see a file change in a commit, we expect one of: 1. A mark. 2. An "inline" keyword. 3. An object sha1. The handling of spaces is inconsistent between the three options. Option 1 calls a sub-function which checks for the space, but doesn't parse past it. Option 2 parses the space, then deliberately avoids moving the pointer past it. Option 3 detects the space locally but doesn't move past it. This is confusing, because it looks like option 1 forgets to check for the space (it's just buried). And option 2 checks for "inline ", but only moves strlen("inline") characters forward, which looks like a bug but isn't. We can make this more clear by just having each branch move past the space as it is checked (and we can replace the doubled use of "inline" with a call to skip_prefix). Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-06-20fast-import: use skip_prefix for parsing inputLibravatar Jeff King1-72/+51
Fast-import does a lot of parsing of commands and dispatching to sub-functions. For example, given "option foo", we might recognize "option " using starts_with, and then hand it off to parse_option() to do the rest. However, we do not let parse_option know that we have parsed the first part already. It gets the full buffer, and has to skip past the uninteresting bits. Some functions simply add a magic constant: char *option = command_buf.buf + 7; Others use strlen: char *option = command_buf.buf + strlen("option "); And others use strchr: char *option = strchr(command_buf.buf, ' ') + 1; All of these are brittle and easy to get wrong (especially given that the starts_with call and the code that assumes the presence of the prefix are far apart). Instead, we can use skip_prefix, and just pass each handler a pointer to its arguments. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-06-20use skip_prefix to avoid magic numbersLibravatar Jeff King1-32/+37
It's a common idiom to match a prefix and then skip past it with a magic number, like: if (starts_with(foo, "bar")) foo += 3; This is easy to get wrong, since you have to count the prefix string yourself, and there's no compiler check if the string changes. We can use skip_prefix to avoid the magic numbers here. Note that some of these conversions could be much shorter. For example: if (starts_with(arg, "--foo=")) { bar = arg + 6; continue; } could become: if (skip_prefix(arg, "--foo=", &bar)) continue; However, I have left it as: if (skip_prefix(arg, "--foo=", &v)) { bar = v; continue; } to visually match nearby cases which need to actually process the string. Like: if (skip_prefix(arg, "--foo=", &v)) { bar = atoi(v); continue; } Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-06-20fast-import: fix read of uninitialized argv memoryLibravatar Jeff King1-5/+8
Fast-import shares code between its command-line parser and the "option" command. To do so, it strips the "--" from any command-line options and passes them to the option parser. However, it does not confirm that the option even begins with "--" before blindly passing "arg + 2". It does confirm that the option starts with "-", so the only affected case was: git fast-import - which would read uninitialized memory after the argument. We can fix it by using skip_prefix and checking the result. As a bonus, this gets rid of some magic numbers. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-04-21fast-import: add support to delete refsLibravatar Felipe Contreras1-3/+10
Signed-off-by: Felipe Contreras <felipe.contreras@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-03-10use strchrnul() in place of strchr() and strlen()Libravatar Rohit Mani1-21/+12
Avoid scanning strings twice, once with strchr() and then with strlen(), by using strchrnul(). Helped-by: Junio C Hamano <gitster@pobox.com> Signed-off-by: Rohit Mani <rohit.mani@outlook.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-12-05replace {pre,suf}fixcmp() with {starts,ends}_with()Libravatar Christian Couder1-40/+40
Leaving only the function definitions and declarations so that any new topic in flight can still make use of the old functions, replace existing uses of the prefixcmp() and suffixcmp() with new API functions. The change can be recreated by mechanically applying this: $ git grep -l -e prefixcmp -e suffixcmp -- \*.c | grep -v strbuf\\.c | xargs perl -pi -e ' s|!prefixcmp\(|starts_with\(|g; s|prefixcmp\(|!starts_with\(|g; s|!suffixcmp\(|ends_with\(|g; s|suffixcmp\(|!ends_with\(|g; ' on the result of preparatory changes in this series. Signed-off-by: Christian Couder <chriscool@tuxfamily.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-09-20Merge branch 'bk/refs-multi-update'Libravatar Junio C Hamano1-1/+1
Give "update-refs" a "--stdin" option to read multiple update requests and perform them in an all-or-none fashion. * bk/refs-multi-update: update-ref: add test cases covering --stdin signature update-ref: support multiple simultaneous updates refs: add update_refs for multiple simultaneous updates refs: add function to repack without multiple refs refs: factor delete_ref loose ref step into a helper refs: factor update_ref steps into helpers refs: report ref type from lock_any_ref_for_update reset: rename update_refs to reset_refs
2013-09-17Merge branch 'rh/ishes-doc'Libravatar Junio C Hamano1-10/+10
We liberally use "committish" and "commit-ish" (and "treeish" and "tree-ish"); as these are non-words, let's unify these terms to their dashed form. More importantly, clarify the documentation on object peeling using these terms. * rh/ishes-doc: glossary: fix and clarify the definition of 'ref' revisions.txt: fix and clarify <rev>^{<type>} glossary: more precise definition of tree-ish (a.k.a. treeish) use 'commit-ish' instead of 'committish' use 'tree-ish' instead of 'treeish' glossary: define commit-ish (a.k.a. committish) glossary: mention 'treeish' as an alternative to 'tree-ish'
2013-09-04use 'commit-ish' instead of 'committish'Libravatar Richard Hansen1-8/+8
Replace 'committish' in documentation and comments with 'commit-ish' to match gitglossary(7) and to be consistent with 'tree-ish'. The only remaining instances of 'committish' are: * variable, function, and macro names * "(also committish)" in the definition of commit-ish in gitglossary[7] Signed-off-by: Richard Hansen <rhansen@bbn.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-09-04use 'tree-ish' instead of 'treeish'Libravatar Richard Hansen1-2/+2
Replace 'treeish' in documentation and comments with 'tree-ish' to match gitglossary(7). The only remaining instances of 'treeish' are: * variable, function, and macro names * "(also treeish)" in the definition of tree-ish in gitglossary(7) Signed-off-by: Richard Hansen <rhansen@bbn.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-09-04Merge branch 'jk/fast-import-empty-ls'Libravatar Junio C Hamano1-20/+38
* jk/fast-import-empty-ls: fast-import: allow moving the root tree fast-import: allow ls or filecopy of the root tree fast-import: set valid mode on root tree in "ls" t9300: document fast-import empty path issues
2013-08-30refs: report ref type from lock_any_ref_for_updateLibravatar Brad King1-1/+1
Expose lock_ref_sha1_basic's type_p argument to callers of lock_any_ref_for_update. Update all call sites to ignore it by passing NULL for now. Signed-off-by: Brad King <brad.king@kitware.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-06-23fast-import: allow moving the root treeLibravatar John Keeping1-7/+14
Because fast-import.c::tree_content_remove does not check for the empty path, it is not possible to move the root tree to a subdirectory. Instead the error "Path not in branch" is produced (note the double space where the empty path has been inserted). Fix this by explicitly checking for the empty path and handling it. Signed-off-by: John Keeping <john@keeping.me.uk> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-06-23fast-import: allow ls or filecopy of the root treeLibravatar John Keeping1-13/+22
Commit 178e1de (fast-import: don't allow 'ls' of path with empty components, 2012-03-09) restricted paths which: . contain an empty directory component (e.g. foo//bar is invalid), . end with a directory separator (e.g. foo/ is invalid), . start with a directory separator (e.g. /foo is invalid). However, the implementation also caught the empty path, which should represent the root tree. Relax this restriction so that the empty path is explicitly allowed and refers to the root tree. Reported-by: Dave Abrahams <dave@boostpro.com> Signed-off-by: John Keeping <john@keeping.me.uk> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-06-23fast-import: set valid mode on root tree in "ls"Libravatar John Keeping1-0/+2
This prevents a failure later when we lift the restriction on ls with the empty path. Signed-off-by: John Keeping <john@keeping.me.uk> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-06-02Merge branch 'fc/fast-export-persistent-marks'Libravatar Junio C Hamano1-1/+1
Optimization for fast-export by avoiding unnecessarily resolving arbitrary object name and parsing object when only presence and type information is necessary, etc. * fc/fast-export-persistent-marks: fast-{import,export}: use get_sha1_hex() to read from marks file fast-export: don't parse commits while reading marks file fast-export: do not parse non-commit objects while reading marks file
2013-05-07fast-{import,export}: use get_sha1_hex() to read from marks fileLibravatar Felipe Contreras1-1/+1
It's wrong to call get_sha1() if they should be SHA-1s, plus inefficient. Signed-off-by: Felipe Contreras <felipe.contreras@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-04-28sparse: Fix mingw_main() argument number/type errorsLibravatar Ramsay Jones1-2/+2
Sparse issues 68 errors (two errors for each main() function) such as the following: SP git.c git.c:510:5: error: too many arguments for function mingw_main git.c:510:5: error: symbol 'mingw_main' redeclared with different type \ (originally declared at git.c:510) - different argument counts The errors are caused by the 'main' macro used by the MinGW build to provide a replacement main() function. The original main function is effectively renamed to 'mingw_main' and is called from the new main function. The replacement main is used to execute certain actions common to all git programs on MinGW (e.g. ensure the standard I/O streams are in binary mode). In order to suppress the errors, we change the macro to include the parameters in the declaration of the mingw_main function. Unfortunately, this change provokes both sparse and gcc to complain about 9 calls to mingw_main(), such as the following: CC git.o git.c: In function 'main': git.c:510: warning: passing argument 2 of 'mingw_main' from \ incompatible pointer type git.c:510: note: expected 'const char **' but argument is of \ type 'char **' In order to suppress these warnings, since both of the main functions need to be declared with the same prototype, we change the declaration of the 9 main functions, thus: int main(int argc, char **argv) Signed-off-by: Ramsay Jones <ramsay@ramsay1.demon.co.uk> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-03-29fast-import: Fix an gcc -Wuninitialized warningLibravatar Ramsay Jones1-0/+1
Commit cbfd5e1c ("drop some obsolete "x = x" compiler warning hacks", 21-03-2013) removed a gcc hack that suppressed an "might be used uninitialized" warning issued by older versions of gcc. However, commit 3aa99df8 ('fast-import: clarify "inline" logic in file_change_m', 21-03-2013) addresses an (almost) identical issue (with very similar code), but includes additional code in it's resolution. The solution used by this commit, unlike that used by commit cbfd5e1c, also suppresses the -Wuninitialized warning on older versions of gcc. In order to suppress the warning (against the 'oe' symbol) in the note_change_n() function, we adopt the same solution used by commit 3aa99df8. Signed-off-by: Ramsay Jones <ramsay@ramsay1.demon.co.uk> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-03-21fast-import: clarify "inline" logic in file_change_mLibravatar Jeff King1-1/+2
When we read a fast-import line like: M 100644 :1 foo.c we point the local object_entry variable "oe" to the object named by the mark ":1". When the input uses the "inline" construct, however, we do not have such an object_entry. The current code is careful not to access "oe" in the inline case, but we can make the assumption even more obvious (and catch violations of it) by setting oe to NULL and adding a comment. As a bonus, this also squelches an over-zealous gcc -Wuninitialized warning, which means we can drop the "oe = oe" initialization hack. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-03-21drop some obsolete "x = x" compiler warning hacksLibravatar Jeff King1-1/+1
In cases where the setting and access of a variable are protected by the same conditional flag, older versions of gcc would generate a "might be used unitialized" warning. We silence the warning by initializing the variable to itself, a hack that gcc recognizes. Modern versions of gcc are smart enough to get this right, going back to at least version 4.3.5. gcc 4.1 does get it wrong in both cases, but is sufficiently old that we probably don't need to care about it anymore. Signed-off-by: Jeff King <peff@peff.net> Reviewed-by: Jonathan Nieder <jrnieder@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-03-21fast-import: use pointer-to-pointer to keep list tailLibravatar Jeff King1-6/+4
This is shorter, idiomatic, and it means the compiler does not get confused about whether our "e" pointer is valid, letting us drop the "e = e" hack. Signed-off-by: Jeff King <peff@peff.net> Reviewed-by: Jonathan Nieder <jrnieder@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-09-11Merge branch 'jc/merge-bases'Libravatar Junio C Hamano1-1/+1
Optimise the "merge-base" computation a bit, and also update its users that do not need the full merge-base information to call a cheaper subset. * jc/merge-bases: reduce_heads(): reimplement on top of remove_redundant() merge-base: "--is-ancestor A B" get_merge_bases_many(): walk from many tips in parallel in_merge_bases(): use paint_down_to_common() merge_bases_many(): split out the logic to paint history in_merge_bases(): omit unnecessary redundant common ancestor reduction http-push: use in_merge_bases() for fast-forward check receive-pack: use in_merge_bases() for fast-forward check in_merge_bases(): support only one "other" commit