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* Convert memcpy(a,b,20) to hashcpy(a,b).Shawn Pearce2006-08-231-11/+11
| | | | | | | | | | | | | | | | | | | | | | | 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>
* Do not use memcmp(sha1_1, sha1_2, 20) with hardcoded length.David Rientjes2006-08-171-3/+3
| | | | | | | | | | | | | 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>
* make inline is_null_sha1 globalDavid Rientjes2006-08-151-1/+1
| | | | | | | | | | Replace sha1 comparisons to null_sha1 with a global inline (which previously an unused static inline in builtin-apply.c) [jc: with a fix from Jonas Fonseca.] Signed-off-by: David Rientjes <rientjes@google.com> Signed-off-by: Junio C Hamano <junkio@cox.net>
* find_unique_abbrev() with len=0 should not abbreviateJunio C Hamano2006-08-091-1/+1
| | | | Signed-off-by: Junio C Hamano <junkio@cox.net>
* Remove TYPE_* constant macros and use object_type enums consistently.Linus Torvalds2006-07-121-6/+6
| | | | | | | | | | | | | | | This updates the type-enumeration constants introduced to reduce the memory footprint of "struct object" to match the type bits already used in the packfile format, by removing the former (i.e. TYPE_* constant macros) and using the latter (i.e. enum object_type) throughout the code for consistency. Eventually we can stop passing around the "type strings" entirely, and this will help - no confusion about two different integer enumeration. Signed-off-by: Linus Torvalds <torvalds@osdl.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
* Rename safe_strncpy() to strlcpy().Peter Eriksen2006-06-241-1/+1
| | | | | | | | | | | This cleans up the use of safe_strncpy() even more. Since it has the same semantics as strlcpy() use this name instead. Also move the definition from inside path.c to its own file compat/strlcpy.c, and use it conditionally at compile time, since some platforms already has strlcpy(). It's included in the same way as compat/setenv.c. Signed-off-by: Peter Eriksen <s022018@student.dtu.dk> Signed-off-by: Junio C Hamano <junkio@cox.net>
* Shrink "struct object" a bitLinus Torvalds2006-06-171-11/+11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | This shrinks "struct object" by a small amount, by getting rid of the "struct type *" pointer and replacing it with a 3-bit bitfield instead. In addition, we merge the bitfields and the "flags" field, which incidentally should also remove a useless 4-byte padding from the object when in 64-bit mode. Now, our "struct object" is still too damn large, but it's now less obviously bloated, and of the remaining fields, only the "util" (which is not used by most things) is clearly something that should be eventually discarded. This shrinks the "git-rev-list --all" memory use by about 2.5% on the kernel archive (and, perhaps more importantly, on the larger mozilla archive). That may not sound like much, but I suspect it's more on a 64-bit platform. There are other remaining inefficiencies (the parent lists, for example, probably have horrible malloc overhead), but this was pretty obvious. Most of the patch is just changing the comparison of the "type" pointer from one of the constant string pointers to the appropriate new TYPE_xxx small integer constant. Signed-off-by: Linus Torvalds <torvalds@osdl.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
* Implement safe_strncpy() as strlcpy() and use it more.Peter Eriksen2006-06-161-2/+1
| | | | | Signed-off-by: Peter Eriksen <s022018@student.dtu.dk> Signed-off-by: Junio C Hamano <junkio@cox.net>
* Change 'master@noon' syntax to 'master@{noon}'.Shawn Pearce2006-05-191-10/+17
| | | | | | | | | | | Its ambiguous to parse "master@2006-05-17 18:30:foo" when foo is meant as a file name and ":30" is meant as 30 minutes past 6 pm. Therefore all date specifications in a sha1 expression must now appear within brackets and the ':' splitter used for the path name in a sha1 expression ignores ':' appearing within brackets. Signed-off-by: Shawn O. Pearce <spearce@spearce.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
* Fix ref log parsing so it works properly.Shawn Pearce2006-05-171-0/+1
| | | | | | | | | The log parser was only ever matching the last log record due to calling strtoul on "> 1136091609" rather than " 1136091609". Also once a match for '@' has been found after the name of the ref there is no point in looking for another '@' within the remaining text. Signed-off-by: Junio C Hamano <junkio@cox.net>
* Support 'master@2 hours ago' syntaxShawn Pearce2006-05-171-17/+42
| | | | | | | | | | | Extended sha1 expressions may now include date specifications which indicate a point in time within the local repository's history. If the ref indicated to the left of '@' has a log in $GIT_DIR/logs/<ref> then the value of the ref at the time indicated by the specification is obtained from the ref's log. Signed-off-by: Shawn O. Pearce <spearce@spearce.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
* get_sha1() - fix infinite loop on nonexistent stage.Junio C Hamano2006-05-081-0/+1
| | | | Signed-off-by: Junio C Hamano <junkio@cox.net>
* get_sha1(): :path and :[0-3]:path to extract from index.Junio C Hamano2006-04-301-8/+46
| | | | | | | | | Earlier patch to say <ent>:<path> by Linus was very useful, and this extends the same idea to the current index. An sha1 expression :<path> extracts the object name for the named path from the current index. Signed-off-by: Junio C Hamano <junkio@cox.net>
* get_tree_entry(): make it available from tree-walkJunio C Hamano2006-04-191-52/+0
| | | | Signed-off-by: Junio C Hamano <junkio@cox.net>
* sha1_name.c: no need to include diff.h; tree-walk.h will do.Junio C Hamano2006-04-191-1/+1
| | | | Signed-off-by: Junio C Hamano <junkio@cox.net>
* sha1_name.c: prepare to make get_tree_entry() reusable from others.Junio C Hamano2006-04-191-9/+10
| | | | Signed-off-by: Junio C Hamano <junkio@cox.net>
* get_sha1() shorthands for blob/tree objectsLinus Torvalds2006-04-181-1/+66
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This is a fairly straightforward patch to allow "get_sha1()" to also have shorthands for tree and blob objects. The syntax is very simple and intuitive: you can specify a tree or a blob by simply specifying <revision>:<path>, and get_sha1() will do the SHA1 lookup from the tree for you. You can currently do it with "git ls-tree <rev> <path>" and parsing the output, but that's actually pretty awkward. With this, you can do something like git cat-file blob v1.2.4:Makefile to get the contents of "Makefile" at revision v1.2.4. Now, this isn't necessarily something you really need all that often, but the concept itself is actually pretty powerful. We could, for example, allow things like git diff v0.99.6:git-commit-script..v1.3.0:git-commit.sh to see the difference between two arbitrary files in two arbitrary revisions. To do that, the only thing we'd have to do is to make git-diff-tree accept two blobs to diff, in addition to the two trees it now expects. Signed-off-by: Junio C Hamano <junkio@cox.net>
* sha1_name: warning ambiguous refs.Junio C Hamano2006-03-231-3/+2
| | | | | | | | | This makes sure that many commands that take refs on the command line to honor core.warnambiguousrefs configuration. Earlier, the commands affected by this patch did not read the configuration file. Signed-off-by: Junio C Hamano <junkio@cox.net>
* get_sha1_basic(): try refs/... and finally refs/remotes/$foo/HEADJunio C Hamano2006-03-211-11/+12
| | | | | | | | | This implements the suggestion by Jeff King to use refs/remotes/$foo/HEAD to interpret a shorthand "$foo" to mean the primary branch head of a tracked remote. clone needs to be told about this convention as well. Signed-off-by: Junio C Hamano <junkio@cox.net>
* core.warnambiguousrefs: warns when "name" is used and both "name" branch and ↵Junio C Hamano2006-03-201-3/+20
| | | | | | tag exists. Signed-off-by: Junio C Hamano <junkio@cox.net>
* find_unique_abbrev() simplification.Junio C Hamano2006-02-101-2/+4
| | | | | | | | | Earlier it did not grok the 0{40} SHA1 very well, but what it needed to do was to find the shortest 0{N} that is not used as a valid object name to be consistent with the way names of valid objects are abbreviated. This makes some users simpler. Signed-off-by: Junio C Hamano <junkio@cox.net>
* get_sha1_1: allow octopus^12 to be properly parsed.Junio C Hamano2006-02-021-23/+16
| | | | | | | | | | | | We probably thought anybody who does more than 9 parents in an Octopus is insane when this was initially done, but there is no inherent reason to limit the number of independent topic branches that happen to mature at the same time. Our commit-tree allows up to 16 already, so at least we should prepare to handle what we can produce, if only to be consistent. Signed-off-by: Junio C Hamano <junkio@cox.net>
* abbrev cleanup: use symbolic constantsJunio C Hamano2006-01-281-1/+1
| | | | | | | | | | The minimum length of abbreviated object name was hardcoded in different places to be 4, risking inconsistencies in the future. Also there were three different "default abbreviation precision". Use two C preprocessor symbols to clean up this mess. Signed-off-by: Junio C Hamano <junkio@cox.net>
* Use symbolic name SHORT_NAME_AMBIGUOUS as error return valueUwe Zeisberger2006-01-261-1/+1
| | | | | Signed-off-by: Uwe Zeisberger <zeisberg@informatik.uni-freiburg.de> Signed-off-by: Junio C Hamano <junkio@cox.net>
* diff: --abbrev optionJunio C Hamano2005-12-191-0/+3
| | | | | | | | | | | When I show transcripts to explain how something works, I often find myself hand-editing the diff-raw output to shorten various object names in the output. This adds --abbrev option to the diff family, which shortens diff-raw output and diff-tree commit id headers. Signed-off-by: Junio C Hamano <junkio@cox.net>
* Revert "get_sha1_basic(): corner case ambiguity fix"Junio C Hamano2005-12-171-1/+1
| | | | | | | This reverts 6677c4665af2d73f670bec382bc82d0f2e9513fb commit. The misguided disambiguation has been reverted, so there is no point testing that misfeature.
* Remove misguided branch disambiguation.Junio C Hamano2005-12-171-30/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | This removes the misguided attempt to refuse processing a branch name xyzzy and insist it to be given as either heads/xyzzy or tags/xyzzy when a tag xyzzy exists. There was no reason to do so --- the search order was predictable and well defined, so if the user says xyzzy we should have taken the tag xyzzy in such a case without complaining. This incidentally fixes another subtle bug related to this. If such a duplicate branch/tag name happened to be a unique valid prefix of an existing commit object name (say, "beef"), we did not take the tag "beef" but after complaining used the commit object whose name started with beef. Another problem this fixes while introducing some confusion is that there is no longer a reason to forbid a branch name HEAD anymore. In other words, now "git pull . ref1:HEAD" would work as expected, once we revert "We do not like HEAD branch" patch. It creates "HEAD" branch under ${GIT_DIR-.git}/refs/heads (or fast-forwards if already exists) using the tip of ref1 branch from the current repository, and merges it into the current branch. Signed-off-by: Junio C Hamano <junkio@cox.net>
* get_sha1_basic(): corner case ambiguity fixJunio C Hamano2005-12-151-9/+26
| | | | | | | | | | | | | | When .git/refs/heads/frotz and .git/refs/tags/frotz existed, and the object name stored in .git/refs/heads/frotz were corrupt, we ended up picking tags/frotz without complaining. Worse yet, if the corrupt .git/refs/heads/frotz was more than 40 bytes and began with hexadecimal characters, it silently overwritten the initial part of the returned result. This commit adds a couple of tests to demonstrate these cases, with a fix. Signed-off-by: Junio C Hamano <junkio@cox.net>
* Make sure heads/foo and tags/foo do not confuse things.Junio C Hamano2005-11-211-3/+14
| | | | | | | | | When both heads/foo and tags/foo exist, get_sha1_basic("foo") picked up the tag without complaining, which is quite confusing. Make sure we require unambiguous form, "heads/foo" or "tags/foo" in such cases. Signed-off-by: Junio C Hamano <junkio@cox.net>
* Be careful when dereferencing tags.Junio C Hamano2005-11-021-1/+1
| | | | | | | | | | One caller of deref_tag() was not careful enough to make sure what deref_tag() returned was not NULL (i.e. we found a tag object that points at an object we do not have). Fix it, and warn about refs that point at such an incomplete tag where needed. Signed-off-by: Junio C Hamano <junkio@cox.net>
* Be more careful about reference parsingLinus Torvalds2005-10-281-0/+27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This does two things: - we don't allow "." and ".." as components of a refname. Thus get_sha1() will not accept "./refname" as being the same as "refname" any more. - git-rev-parse stops doing revision translation after seeing a pathname, to match the brhaviour of all the tools (once we see a pathname, everything else will also be parsed as a pathname). Basically, if you did git log * and "gitk" was somewhere in the "*", we don't want to replace the filename "gitk" with the SHA1 of the branch with the same name. Of course, if there is any change of ambiguity, you should always use "--" to make it explicit what are filenames and what are revisions, but this makes the normal cases sane. The refname rule also means that instead of the "--", you can do the same thing we're used to doing with filenames that start with a slash: use "./filename" instead, and now it's a filename, not an option (and not a revision). So "git log ./*.c" is now actually a perfectly valid thing to do, even if the first C-file might have the same name as a branch. Trivial test: git-rev-parse gitk ./gitk gitk should output something like 9843c3074dfbf57117565f6b7c93e3e6812857ee ./gitk gitk where the "./gitk" isn't seen as a revision, and the second "gitk" is a filename simply because we've seen filenames already, and thus stopped doing revision parsing. Signed-off-by: Linus Torvalds <torvalds@osdl.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
* Make sure we barf on ref^{type} failure.Junio C Hamano2005-10-191-1/+3
| | | | | | | Martin Langhoff noticed that ref^0 barfed correctly when we did not have the commit in a broken repository, but ref^{commit} didn't. Signed-off-by: Junio C Hamano <junkio@cox.net>
* Introduce notation "ref^{type}".Junio C Hamano2005-10-151-0/+83
| | | | | | | | | | | | | | | | | | | | Existing "tagname^0" notation means "dereference tag zero or more times until you cannot dereference it anymore, and make sure it is a commit -- otherwise barf". But tags do not necessarily reference commit objects. This commit introduces a bit more generalized notation, "ref^{type}". Existing "ref^0" is a shorthand for "ref^{commit}". If the type is empty, it just dereferences tags until it hits a non-tag object. With this, "git-rev-parse --verify 'junio-gpg-pub^{}'" shows the blob object name -- there is no need to manually read the tag object and find out the object name anymore. "git-rev-parse --verify 'HEAD^{tree}'" can be used to find out the tree object name of the HEAD commit. Signed-off-by: Junio C Hamano <junkio@cox.net>
* show-branch: optionally use unique prefix as name.Junio C Hamano2005-10-111-7/+33
| | | | | | | | | | git-show-branch acquires two new options. --sha1-name to name commits using the unique prefix of their object names, and --no-name to not to show names at all. This was outlined in <7vk6gpyuyr.fsf@assigned-by-dhcp.cox.net> Signed-off-by: Junio C Hamano <junkio@cox.net>
* Make sure get_sha1 does not accept ambiguous sha1 prefix (again).Junio C Hamano2005-10-031-6/+15
| | | | | | | | The earlier fix incorrectly dropped the code the original had to ensure the found SHA1 is at least unique within the same pack. Restore the check. Signed-off-by: Junio C Hamano <junkio@cox.net>
* Error message from get_sha1() on ambiguous short SHA1.Junio C Hamano2005-10-031-1/+1
| | | | | | | | | Unlike cases where "no such object exists", the case where specified prefix is ambiguous would confuse the user if we say "no such commit" or such. Give an extra error message from the uniqueness check if there are more than one objects that match the given prefix. Signed-off-by: Junio C Hamano <junkio@cox.net>
* Make sure get_sha1 does not accept ambiguous sha1 prefix.Junio C Hamano2005-10-021-21/+68
| | | | | | | | The original code did not even check alternates, and was confused if an unpacked object was uniquely found when there was another object that shares the same prefix in the pack. Signed-off-by: Junio C Hamano <junkio@cox.net>
* [PATCH] Allow reading "symbolic refs" that point to other refsLinus Torvalds2005-10-011-16/+1
| | | | | | | | | | | | | | | | This extends the ref reading to understand a "symbolic ref": a ref file that starts with "ref: " and points to another ref file, and thus introduces the notion of ref aliases. This is in preparation of allowing HEAD to eventually not be a symlink, but one of these symbolic refs instead. [jc: Linus originally required the prefix to be "ref: " five bytes and nothing else, but I changed it to allow and strip any number of leading whitespaces to match what update-ref.c does.] Signed-off-by: Linus Torvalds <torvalds@osdl.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
* Fix extended short SHA1 name completionLinus Torvalds2005-09-201-7/+5
| | | | | | | | | | | | | | | | | get_sha1() would not do sha1 completion of short SHA1's when they were part of a more complex expression. So doing git-rev-parse 727132834e6be48a93c1bd6458a29d474ce7d5d5^ would work, and return 87c6aeb4efdd4355918d127a91bd0adc5a02f8ff. But using the shorthand version git-rev-list 72713^ wouldn't work. Signed-off-by: Linus Torvalds <torvalds@osdl.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
* [PATCH] Add a new extended SHA1 syntax <name>~<num>Junio C Hamano2005-08-221-0/+41
| | | | | | | | | | | | The new notation is a short-hand for <name> followed by <num> caret ('^') characters. E.g. "master~4" is the fourth generation ancestor of the current "master" branch head, following the first parents; same as "master^^^^" but a bit more readable. This will be used in the updated "git show-branch" command. Signed-off-by: Junio C Hamano <junkio@cox.net>
* [PATCH] sha1_name: do not accept .git/refs/snap/.Junio C Hamano2005-08-211-1/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | I think Linus did a cut & paste from an early JIT code while developing the current extended SHA1 notation, and left it there as a courtesy, but the directory does not deserve to be treated any more specially than, say, .git/refs/bisect. If the subdirectories under .git/refs proliferate, we may want to switch to scanning that hierarchy at runtime, instead of the current hard-coded set, although I think that would be overkill. Signed-off-by: Junio C Hamano <junkio@cox.net> From nobody Mon Sep 17 00:00:00 2001 Subject: [PATCH] Add a new extended SHA1 syntax <name>:<num> From: Junio C Hamano <junkio@cox.net> Date: 1124617434 -0700 The new notation is a short-hand for <name> followed by <num> caret ('^') characters. E.g. "master:4" is the fourth generation ancestor of the current "master" branch head, following the first parents; same as "master^^^^" but a bit more readable. This will be used in the updated "git show-branch" command. Signed-off-by: Junio C Hamano <junkio@cox.net> --- sha1_name.c | 41 +++++++++++++++++++++++++++++++++++++++++ 1 files changed, 41 insertions(+), 0 deletions(-) d5098ce769da46df6d45dc8f41b06dd758fdaea7 diff --git a/sha1_name.c b/sha1_name.c --- a/sha1_name.c +++ b/sha1_name.c @@ -191,9 +191,29 @@ static int get_parent(const char *name, return -1; } +static int get_nth_ancestor(const char *name, int len, + unsigned char *result, int generation) +{ + unsigned char sha1[20]; + int ret = get_sha1_1(name, len, sha1); + if (ret) + return ret; + + while (generation--) { + struct commit *commit = lookup_commit_reference(sha1); + + if (!commit || parse_commit(commit) || !commit->parents) + return -1; + memcpy(sha1, commit->parents->item->object.sha1, 20); + } + memcpy(result, sha1, 20); + return 0; +} + static int get_sha1_1(const char *name, int len, unsigned char *sha1) { int parent, ret; + const char *cp; /* foo^[0-9] or foo^ (== foo^1); we do not do more than 9 parents. */ if (len > 2 && name[len-2] == '^' && @@ -210,6 +230,27 @@ static int get_sha1_1(const char *name, if (parent >= 0) return get_parent(name, len, sha1, parent); + /* name:3 is name^^^, + * name:12 is name^^^^^^^^^^^^, and + * name: is name + */ + parent = 0; + for (cp = name + len - 1; name <= cp; cp--) { + int ch = *cp; + if ('0' <= ch && ch <= '9') + continue; + if (ch != ':') + parent = -1; + break; + } + if (!parent && *cp == ':') { + int len1 = cp - name; + cp++; + while (cp < name + len) + parent = parent * 10 + *cp++ - '0'; + return get_nth_ancestor(name, len1, sha1, parent); + } + ret = get_sha1_basic(name, len, sha1); if (!ret) return 0;
* [PATCH] Make get_sha1_basic() more carefulLinus Torvalds2005-08-131-1/+1
| | | | | | | | | | | | The "get_sha1_hex()" function is designed to work with SHA1 hex strings that may be followed by arbitrary crud. However, that's not acceptable for "get_sha1()" which is used for command line arguments etc: we don't want to silently allow random characters after the end of the SHA1. So verify that the hex string is all we have. Signed-off-by: Linus Torvalds <torvalds@osdl.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
* [PATCH] Make sure git-resolve-script always works on commitsLinus Torvalds2005-08-131-7/+3
| | | | | | | | | | | | | | | You can resolve a tag, and it does the right thing except that it might end up writing the tag itself into the resulting HEAD, which will confuse subsequent operations no end. This makes sure that when we resolve two heads, we will have turned them into proper commits before we start acting on them. This also fixes the parsing of "treeish^0", which would incorrectly resolve to "treeish" instead of causing an error. Signed-off-by: Linus Torvalds <torvalds@osdl.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
* [PATCH] Fix git-rev-parse's parent handlingJohannes Schindelin2005-08-101-3/+6
| | | | | | | | | | | | git-rev-parse HEAD^1 would fail, because of an off-by-one bug (but HEAD^ would yield the expected result). Also, when the parent does not exist, do not silently return an incorrect SHA1. Of course, this no longer applies to git-rev-parse alone, but every user of get_sha1(). While at it, add a test. Signed-off-by: Johannes Schindelin <Johannes.Schindelin@gmx.de> Signed-off-by: Junio C Hamano <junkio@cox.net>
* Update get_sha1() to grok extended format.Junio C Hamano2005-08-051-0/+228
Everybody envies rev-parse, who is the only one that can grok the extended sha1 format. Move the get_extended_sha1() out of rev-parse, rename it to get_sha1() and make it available to everybody else. The one I posted earlier to the list had one bug where it did not handle a name that ends with a digit correctly (it incorrectly tried the "Nth parent" path). This commit fixes it. Signed-off-by: Junio C Hamano <junkio@cox.net>
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