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2010-02-22Move 'builtin-*' into a 'builtin/' subdirectoryLinus Torvalds
This shrinks the top-level directory a bit, and makes it much more pleasant to use auto-completion on the thing. Instead of [torvalds@nehalem git]$ em buil<tab> Display all 180 possibilities? (y or n) [torvalds@nehalem git]$ em builtin-sh builtin-shortlog.c builtin-show-branch.c builtin-show-ref.c builtin-shortlog.o builtin-show-branch.o builtin-show-ref.o [torvalds@nehalem git]$ em builtin-shor<tab> builtin-shortlog.c builtin-shortlog.o [torvalds@nehalem git]$ em builtin-shortlog.c you get [torvalds@nehalem git]$ em buil<tab> [type] builtin/ builtin.h [torvalds@nehalem git]$ em builtin [auto-completes to] [torvalds@nehalem git]$ em builtin/sh<tab> [type] shortlog.c shortlog.o show-branch.c show-branch.o show-ref.c show-ref.o [torvalds@nehalem git]$ em builtin/sho [auto-completes to] [torvalds@nehalem git]$ em builtin/shor<tab> [type] shortlog.c shortlog.o [torvalds@nehalem git]$ em builtin/shortlog.c which doesn't seem all that different, but not having that annoying break in "Display all 180 possibilities?" is quite a relief. NOTE! If you do this in a clean tree (no object files etc), or using an editor that has auto-completion rules that ignores '*.o' files, you won't see that annoying 'Display all 180 possibilities?' message - it will just show the choices instead. I think bash has some cut-off around 100 choices or something. So the reason I see this is that I'm using an odd editory, and thus don't have the rules to cut down on auto-completion. But you can simulate that by using 'ls' instead, or something similar. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-08-27Merge branch 'jc/maint-unpack-objects-strict'Junio C Hamano
* jc/maint-unpack-objects-strict: Fix "unpack-objects --strict" Conflicts: builtin-unpack-objects.c
2009-08-22Merge branch 'cc/replace'Junio C Hamano
* cc/replace: t6050: check pushing something based on a replaced commit Documentation: add documentation for "git replace" Add git-replace to .gitignore builtin-replace: use "usage_msg_opt" to give better error messages parse-options: add new function "usage_msg_opt" builtin-replace: teach "git replace" to actually replace Add new "git replace" command environment: add global variable to disable replacement mktag: call "check_sha1_signature" with the replacement sha1 replace_object: add a test case object: call "check_sha1_signature" with the replacement sha1 sha1_file: add a "read_sha1_file_repl" function replace_object: add mechanism to replace objects found in "refs/replace/" refs: add a "for_each_replace_ref" function
2009-08-14Fix "unpack-objects --strict"Junio C Hamano
When unpack-objects is run under the --strict option, objects that have pointers to other objects are verified for the reachability at the end, by calling check_object() on each of them, and letting check_object to walk the reachable objects from them using fsck_walk() recursively. The function however misunderstands the semantics of fsck_walk() function when it makes a call to it, setting itself as the callback. fsck_walk() expects the callback function to return a non-zero value to signal an error (negative value causes an immediate abort, positive value is still an error but allows further checks on sibling objects) and return zero to signal a success. The function however returned 1 on some non error cases, and to cover up this mistake, complained only when fsck_walk() did not detect any error. To fix this double-bug, make the function return zero on all success cases, and also check for non-zero return from fsck_walk() for an error. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-07-06Merge branch 'tr/die_errno'Junio C Hamano
* tr/die_errno: Use die_errno() instead of die() when checking syscalls Convert existing die(..., strerror(errno)) to die_errno() die_errno(): double % in strerror() output just in case Introduce die_errno() that appends strerror(errno) to die()
2009-06-27Convert existing die(..., strerror(errno)) to die_errno()Thomas Rast
Change calls to die(..., strerror(errno)) to use the new die_errno(). In the process, also make slight style adjustments: at least state _something_ about the function that failed (instead of just printing the pathname), and put paths in single quotes. Signed-off-by: Thomas Rast <trast@student.ethz.ch> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-06-21Fix various sparse warnings in the git source codeLinus Torvalds
There are a few remaining ones, but this fixes the trivial ones. It boils down to two main issues that sparse complains about: - warning: Using plain integer as NULL pointer Sparse doesn't like you using '0' instead of 'NULL'. For various good reasons, not the least of which is just the visual confusion. A NULL pointer is not an integer, and that whole "0 works as NULL" is a historical accident and not very pretty. A few of these remain: zlib is a total mess, and Z_NULL is just a 0. I didn't touch those. - warning: symbol 'xyz' was not declared. Should it be static? Sparse wants to see declarations for any functions you export. A lack of a declaration tends to mean that you should either add one, or you should mark the function 'static' to show that it's in file scope. A few of these remain: I only did the ones that should obviously just be made static. That 'wt_status_submodule_summary' one is debatable. It has a few related flags (like 'wt_status_use_color') which _are_ declared, and are used by builtin-commit.c. So maybe we'd like to export it at some point, but it's not declared now, and not used outside of that file, so 'static' it is in this patch. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-06-18Fix big left-shifts of unsigned charLinus Torvalds
Shifting 'unsigned char' or 'unsigned short' left can result in sign extension errors, since the C integer promotion rules means that the unsigned char/short will get implicitly promoted to a signed 'int' due to the shift (or due to other operations). This normally doesn't matter, but if you shift things up sufficiently, it will now set the sign bit in 'int', and a subsequent cast to a bigger type (eg 'long' or 'unsigned long') will now sign-extend the value despite the original expression being unsigned. One example of this would be something like unsigned long size; unsigned char c; size += c << 24; where despite all the variables being unsigned, 'c << 24' ends up being a signed entity, and will get sign-extended when then doing the addition in an 'unsigned long' type. Since git uses 'unsigned char' pointers extensively, we actually have this bug in a couple of places. I may have missed some, but this is the result of looking at git grep '[^0-9 ][ ]*<<[ ][a-z]' -- '*.c' '*.h' git grep '<<[ ]*24' which catches at least the common byte cases (shifting variables by a variable amount, and shifting by 24 bits). I also grepped for just 'unsigned char' variables in general, and converted the ones that most obviously ended up getting implicitly cast immediately anyway (eg hash_name(), encode_85()). In addition to just avoiding 'unsigned char', this patch also tries to use a common idiom for the delta header size thing. We had three different variations on it: "& 0x7fUL" in one place (getting the sign extension right), and "& ~0x80" and "& 0x7f" in two other places (not getting it right). Apart from making them all just avoid using "unsigned char" at all, I also unified them to then use a simple "& 0x7f". I considered making a sparse extension which warns about doing implicit casts from unsigned types to signed types, but it gets rather complex very quickly, so this is just a hack. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-06-01environment: add global variable to disable replacementChristian Couder
This new "read_replace_refs" global variable is set to 1 by default, so that replace refs are used by default. But reachability traversal and packing commands ("cmd_fsck", "cmd_prune", "cmd_pack_objects", "upload_pack", "cmd_unpack_objects") set it to 0, as they must work with the original DAG. Signed-off-by: Christian Couder <chriscool@tuxfamily.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-01-22Merge branch 'lt/maint-wrap-zlib'Junio C Hamano
* lt/maint-wrap-zlib: Wrap inflate and other zlib routines for better error reporting Conflicts: http-push.c http-walker.c sha1_file.c
2009-01-11Wrap inflate and other zlib routines for better error reportingLinus Torvalds
R. Tyler Ballance reported a mysterious transient repository corruption; after much digging, it turns out that we were not catching and reporting memory allocation errors from some calls we make to zlib. This one _just_ wraps things; it doesn't do the "retry on low memory error" part, at least not yet. It is an independent issue from the reporting. Some of the errors are expected and passed back to the caller, but we die when zlib reports it failed to allocate memory for now. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-11-02better validation on delta base object offsetsNicolas Pitre
In one case, it was possible to have a bad offset equal to 0 effectively pointing a delta onto itself and crashing git after too many recursions. In the other cases, a negative offset could result due to off_t being signed. Catch those. Signed-off-by: Nicolas Pitre <nico@cam.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-10-08Replace xmalloc/memset(0) pairs with xcallocBrandon Casey
Many call sites immediately initialize allocated memory with zero after calling xmalloc. A single call to xcalloc can replace this two-call sequence. Signed-off-by: Brandon Casey <casey@nrlssc.navy.mil> Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
2008-10-03fix openssl headers conflicting with custom SHA1 implementationsNicolas Pitre
On ARM I have the following compilation errors: CC fast-import.o In file included from cache.h:8, from builtin.h:6, from fast-import.c:142: arm/sha1.h:14: error: conflicting types for 'SHA_CTX' /usr/include/openssl/sha.h:105: error: previous declaration of 'SHA_CTX' was here arm/sha1.h:16: error: conflicting types for 'SHA1_Init' /usr/include/openssl/sha.h:115: error: previous declaration of 'SHA1_Init' was here arm/sha1.h:17: error: conflicting types for 'SHA1_Update' /usr/include/openssl/sha.h:116: error: previous declaration of 'SHA1_Update' was here arm/sha1.h:18: error: conflicting types for 'SHA1_Final' /usr/include/openssl/sha.h:117: error: previous declaration of 'SHA1_Final' was here make: *** [fast-import.o] Error 1 This is because openssl header files are always included in git-compat-util.h since commit 684ec6c63c whenever NO_OPENSSL is not set, which somehow brings in <openssl/sha1.h> clashing with the custom ARM version. Compilation of git is probably broken on PPC too for the same reason. Turns out that the only file requiring openssl/ssl.h and openssl/err.h is imap-send.c. But only moving those problematic includes there doesn't solve the issue as it also includes cache.h which brings in the conflicting local SHA1 header file. As suggested by Jeff King, the best solution is to rename our references to SHA1 functions and structure to something git specific, and define those according to the implementation used. Signed-off-by: Nicolas Pitre <nico@cam.org> Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
2008-09-16Start conforming code to "git subcmd" style part 3Heikki Orsila
User notifications are presented as 'git cmd', and code comments are presented as '"cmd"' or 'git's cmd', rather than 'git-cmd'. Signed-off-by: Heikki Orsila <heikki.orsila@iki.fi> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-07-06Fix some warnings (on cygwin) to allow -WerrorRamsay Jones
When printing valuds of type uint32_t, we should use PRIu32, and should not assume that it is unsigned int. On 32-bit platforms, it could be defined as unsigned long. The same caution applies to ntohl(). Signed-off-by: Ramsay Jones <ramsay@ramsay1.demon.co.uk> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-05-14Provide git_config with a callback-data parameterJohannes Schindelin
git_config() only had a function parameter, but no callback data parameter. This assumes that all callback functions only modify global variables. With this patch, every callback gets a void * parameter, and it is hoped that this will help the libification effort. Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-03-05unpack-objects: fix --strict handlingJunio C Hamano
Earlier attempt (which was reverted) called added_object() (by the way, the function should be renamed to resolve_dependents() --- it is called when we have a complete object data, and is responsible to resolve pending deltified objects that use this object as their delta base object) without updating obj_list[nr].sha1 with the correct value. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-03-05unpack-objects: prevent writing of inconsistent objectsMartin Koegler
This patch introduces a strict mode, which ensures that: - no malformed object will be written - no object with broken links will be written The patch ensures this by delaying the write of all non blob object. These object are written, after all objects they link to are written. An error can only result in unreferenced objects. Signed-off-by: Martin Koegler <mkoegler@auto.tuwien.ac.at> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-03-04Revert "unpack-objects: prevent writing of inconsistent objects"Junio C Hamano
This reverts commit d5ef408b9afb5b4417f4e7e1593a96302d666650.
2008-02-29unpack-objects: prevent writing of inconsistent objectsMartin Koegler
This patch introduces a strict mode, which ensures that: - no malformed object will be written - no object with broken links will be written The patch ensures this by delaying the write of all non blob object. These object are written, after all objects they link to are written. An error can only result in unreferenced objects. Signed-off-by: Martin Koegler <mkoegler@auto.tuwien.ac.at> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-02-29unpack-object: cache for non written objectsMartin Koegler
Preventing objects with broken links entering the repository means, that write of some objects must be delayed. This patch adds a cache to keep the object data in memory. The delta resolving code must also search in the cache. Signed-off-by: Martin Koegler <mkoegler@auto.tuwien.ac.at> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-10-30relax usage of the progress APINicolas Pitre
Since it is now OK to pass a null pointer to display_progress() and stop_progress() resulting in a no-op, then we can simplify the code and remove a bunch of lines by not making those calls conditional all the time. Signed-off-by: Nicolas Pitre <nico@cam.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-10-30make struct progress an opaque typeNicolas Pitre
This allows for better management of progress "object" existence, as well as making the progress display implementation more independent from its callers. Signed-off-by: Nicolas Pitre <nico@cam.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-10-17more compact progress displayNicolas Pitre
Each progress can be on a single line instead of two. [sp: Changed "Checking files out" to "Checking out files" at Johannes Sixt's suggestion as it better explains the action that is taking place] Signed-off-by: Nicolas Pitre <nico@cam.org> Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
2007-05-16Ensure return value from xread() is always stored into an ssize_tJohan Herland
This patch fixes all calls to xread() where the return value is not stored into an ssize_t. The patch should not have any effect whatsoever, other than putting better/more appropriate type names on variables. Signed-off-by: Johan Herland <johan@herland.net> Signed-off-by: Junio C Hamano <junkio@cox.net>
2007-04-23make progress "title" part of the common progress interfaceNicolas Pitre
If the progress bar ends up in a box, better provide a title for it too. Signed-off-by: Nicolas Pitre <nico@cam.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
2007-04-23common progress display supportNicolas Pitre
Instead of having this code duplicated in multiple places, let's have a common interface for progress display. If someday someone wishes to display a cheezy progress bar instead then only one file will have to be changed. Note: I left merge-recursive.c out since it has a strange notion of progress as it apparently increase the expected total number as it goes. Someone with more intimate knowledge of what that is supposed to mean might look at converting it to the common progress interface. Signed-off-by: Nicolas Pitre <nico@cam.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
2007-04-10add overflow tests on pack offset variablesNicolas Pitre
Change a few size and offset variables to more appropriate type, then add overflow tests on those offsets. This prevents any bad data to be generated/processed if off_t happens to not be large enough to handle some big packs. Better be safe than sorry. Signed-off-by: Nicolas Pitre <nico@cam.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
2007-04-10make overflow test on delta base offset work regardless of variable sizeNicolas Pitre
This patch introduces the MSB() macro to obtain the desired number of most significant bits from a given variable independently of the variable type. It is then used to better implement the overflow test on the OBJ_OFS_DELTA base offset variable with the property of always working correctly regardless of the type/size of that variable. Signed-off-by: Nicolas Pitre <nico@cam.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
2007-02-27convert object type handling from a string to a numberNicolas Pitre
We currently have two parallel notation for dealing with object types in the code: a string and a numerical value. One of them is obviously redundent, and the most used one requires more stack space and a bunch of strcmp() all over the place. This is an initial step for the removal of the version using a char array found in object reading code paths. The patch is unfortunately large but there is no sane way to split it in smaller parts without breaking the system. Signed-off-by: Nicolas Pitre <nico@cam.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
2007-02-21Mechanical conversion to use prefixcmp()Junio C Hamano
This mechanically converts strncmp() to use prefixcmp(), but only when the parameters match specific patterns, so that they can be verified easily. Leftover from this will be fixed in a separate step, including idiotic conversions like if (!strncmp("foo", arg, 3)) => if (!(-prefixcmp(arg, "foo"))) This was done by using this script in px.perl #!/usr/bin/perl -i.bak -p if (/strncmp\(([^,]+), "([^\\"]*)", (\d+)\)/ && (length($2) == $3)) { s|strncmp\(([^,]+), "([^\\"]*)", (\d+)\)|prefixcmp($1, "$2")|; } if (/strncmp\("([^\\"]*)", ([^,]+), (\d+)\)/ && (length($1) == $3)) { s|strncmp\("([^\\"]*)", ([^,]+), (\d+)\)|(-prefixcmp($2, "$1"))|; } and running: $ git grep -l strncmp -- '*.c' | xargs perl px.perl Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-12-20simplify inclusion of system header files.Junio C Hamano
This is a mechanical clean-up of the way *.c files include system header files. (1) sources under compat/, platform sha-1 implementations, and xdelta code are exempt from the following rules; (2) the first #include must be "git-compat-util.h" or one of our own header file that includes it first (e.g. config.h, builtin.h, pkt-line.h); (3) system headers that are included in "git-compat-util.h" need not be included in individual C source files. (4) "git-compat-util.h" does not have to include subsystem specific header files (e.g. expat.h). Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-11-03Allow pack header preprocessing before unpack-objects/index-pack.Nicolas Pitre
Some applications which invoke unpack-objects or index-pack --stdin may want to examine the pack header to determine the number of objects contained in the pack and use that value to determine which executable to invoke to handle the rest of the pack stream. However if the caller consumes the pack header from the input stream then its no longer available for unpack-objects or index-pack --stdin, both of which need the version and object count to process the stream. This change introduces --pack_header=ver,cnt as a command line option that the caller can supply to indicate it has already consumed the pack header and what version and object count were found in that header. As this option is only meant for low level applications such as receive-pack we are not documenting it at this time. Signed-off-by: Nicolas Pitre <nico@cam.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-10-31Use memmove instead of memcpy for overlapping areasEdgar Toernig
Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-09-27teach git-unpack-objects about deltas with offset to baseNicolas Pitre
For delta resolution to be possible, a list of sha1/offset tuple must be constructed in memory in order to load the appropriate base object. Signed-off-by: Nicolas Pitre <nico@cam.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-09-27introduce delta objects with offset to baseNicolas Pitre
This adds a new object, namely OBJ_OFS_DELTA, renames OBJ_DELTA to OBJ_REF_DELTA to better make the distinction between those two delta objects, and adds support for the handling of those new delta objects in sha1_file.c only. The OBJ_OFS_DELTA contains a relative offset from the delta object's position in a pack instead of the 20-byte SHA1 reference to identify the base object. Since the base is likely to be not so far away, the relative offset is more likely to have a smaller encoding on average than an absolute offset. And for those delta objects the base must always be stored first because there is no way to know the distance of later objects when streaming a pack. Hence this relative offset is always meant to be negative. The offset encoding is slightly denser than the one used for object size -- credits to <linux@horizon.com> (whoever this is) for bringing it to my attention. This allows for pack size reduction between 3.2% (Linux-2.6) to over 5% (linux-historic). Runtime pack access should be faster too since delta replay does skip a search in the pack index for each delta in a chain. Signed-off-by: Nicolas Pitre <nico@cam.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-09-13unpack-objects -r: call it "recover".Junio C Hamano
The code called this operation "desperate" but the option flag is -r and the word "recover" describes what it does better. Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-09-04unpack-objects desperately salvages objects from a corrupt packJunio C Hamano
The command unpack-objects dies upon the first error. This is probably considered a feature -- if a pack is corrupt, instead of trying to extract from it and possibly risking to contaminate a good repository with objects whose validity is dubious, we should seek a good copy of the pack and retry. However, we may not have any good copy anywhere. This implements the last resort effort to extract what are salvageable from such a corrupt pack. This flag might have helped Sergio when recovering from a corrupt pack. In my test, it managed to salvage 247 objects out of a pack that had 251 objects but without it the command stopped after extracting 73 objects. Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-08-29unpack-objects: remove unused variable "eof"Johannes Schindelin
Signed-off-by: Johannes Schindelin <Johannes.Schindelin@gmx.de> Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-08-23Convert memcpy(a,b,20) to hashcpy(a,b).Shawn Pearce
This abstracts away the size of the hash values when copying them from memory location to memory location, much as the introduction of hashcmp abstracted away hash value comparsion. A few call sites were using char* rather than unsigned char* so I added the cast rather than open hashcpy to be void*. This is a reasonable tradeoff as most call sites already use unsigned char* and the existing hashcmp is also declared to be unsigned char*. [jc: Splitted the patch to "master" part, to be followed by a patch for merge-recursive.c which is not in "master" yet. Fixed the cast in the latter hunk to combine-diff.c which was wrong in the original. Also converted ones left-over in combine-diff.c, diff-lib.c and upload-pack.c ] Signed-off-by: Shawn O. Pearce <spearce@spearce.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-08-17Do not use memcmp(sha1_1, sha1_2, 20) with hardcoded length.David Rientjes
Introduces global inline: hashcmp(const unsigned char *sha1, const unsigned char *sha2) Uses memcmp for comparison and returns the result based on the length of the hash name (a future runtime decision). Acked-by: Alex Riesen <raa.lkml@gmail.com> Signed-off-by: David Rientjes <rientjes@google.com> Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-08-13Merge branch 'jc/pack-objects'Junio C Hamano
2006-08-04Make git-unpack-objects a builtinMatthias Kestenholz
Signed-off-by: Matthias Kestenholz <matthias@spinlock.ch> Signed-off-by: Junio C Hamano <junkio@cox.net>