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2018-08-13attr: remove an implicit dependency on the_indexLibravatar Nguyễn Thái Ngọc Duy1-1/+1
Make the attr API take an index_state instead of assuming the_index in attr code. All call sites are converted blindly to keep the patch simple and retain current behavior. Individual call sites may receive further updates to use the right index instead of the_index. There is one ugly temporary workaround added in attr.c that needs some more explanation. Commit c24f3abace (apply: file commited with CRLF should roundtrip diff and apply - 2017-08-19) forces one convert_to_git() call to NOT read the index at all. But what do you know, we read it anyway by falling back to the_index. When "istate" from convert_to_git is now propagated down to read_attr_from_array() we will hit segfault somewhere inside read_blob_data_from_index. The right way of dealing with this is to kill "use_index" variable and only follow "istate" but at this stage we are not ready for that: while most git_attr_set_direction() calls just passes the_index to be assigned to use_index, unpack-trees passes a different one which is used by entry.c code, which has no way to know what index to use if we delete use_index. So this has to be done later. Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-07-06userdiff: support new keywords in PHP hunk headerLibravatar Kana Natsuno1-1/+1
Recent version of PHP supports interface, trait, abstract class and final class. This patch fixes the PHP hunk header regexp to support all of these keywords. Signed-off-by: Kana Natsuno <dev@whileimautomaton.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-03-15Merge branch 'tl/userdiff-csharp-async'Libravatar Junio C Hamano1-1/+1
Update funcname pattern used for C# to recognize "async" keyword. * tl/userdiff-csharp-async: userdiff.c: add C# async keyword in diff pattern
2018-03-08userdiff.c: add C# async keyword in diff patternLibravatar Thomas Levesque1-1/+1
Currently C# async methods are not shown in diff hunk headers. I just added the async keyword to the csharp method pattern so that they are properly detected. Signed-off-by: Thomas Levesque <thomas.levesque@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-03-01userdiff: add built-in pattern for golangLibravatar Alban Gruin1-0/+9
This adds xfuncname and word_regex patterns for golang, a quite popular programming language. It also includes test cases for the xfuncname regex (t4018) and updated documentation. The xfuncname regex finds functions, structs and interfaces. Although the Go language prohibits the opening brace from being on its own line, the regex does not makes it mandatory, to be able to match `func` statements like this: func foo(bar int, baz int) { } This is covered by the test case t4018/golang-long-func. The word_regex pattern finds identifiers, integers, floats, complex numbers and operators, according to the go specification. Signed-off-by: Alban Gruin <alban.gruin@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-09-28Merge branch 'ik/userdiff-html-h-element-fix'Libravatar Junio C Hamano1-1/+1
The built-in pattern to detect the "function header" for HTML did not match <H1>..<H6> elements without any attributes, which has been fixed. * ik/userdiff-html-h-element-fix: userdiff: fix HTML hunk header regexp
2017-09-24userdiff: fix HTML hunk header regexpLibravatar Ilya Kantor1-1/+1
Current HTML header regexp doesn't match headers without attributes. So it fails to match <h1>...</h1>, while <h1 class="smth">...</h1> matches. Make attributes optional to fix this. The regexp is still far from perfect, but now it at least handles the common case. Signed-off-by: Ilya Kantor <iliakan@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-09-07userdiff: release strbuf after use in userdiff_get_textconv()Libravatar Rene Scharfe1-0/+1
Signed-off-by: Rene Scharfe <l.s.r@web.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-06-15config: don't include config.h by defaultLibravatar Brandon Williams1-0/+1
Stop including config.h by default in cache.h. Instead only include config.h in those files which require use of the config system. Signed-off-by: Brandon Williams <bmwill@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-02-01attr: convert git_check_attrs() callers to use the new APILibravatar Junio C Hamano1-11/+8
The remaining callers are all simple "I have N attributes I am interested in. I'll ask about them with various paths one by one". After this step, no caller to git_check_attrs() remains. After removing it, we can extend "struct attr_check" struct with data that can be used in optimizing the query for the specific N attributes it contains. Signed-off-by: Junio C Hamano <gitster@pobox.com> Signed-off-by: Stefan Beller <sbeller@google.com> Signed-off-by: Brandon Williams <bmwill@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-02-01attr: rename function and struct related to checking attributesLibravatar Junio C Hamano1-2/+2
The traditional API to check attributes is to prepare an N-element array of "struct git_attr_check" and pass N and the array to the function "git_check_attr()" as arguments. In preparation to revamp the API to pass a single structure, in which these N elements are held, rename the type used for these individual array elements to "struct attr_check_item" and rename the function to "git_check_attrs()". Signed-off-by: Junio C Hamano <gitster@pobox.com> Signed-off-by: Stefan Beller <sbeller@google.com> Signed-off-by: Brandon Williams <bmwill@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2016-06-03userdiff: add built-in pattern for CSSLibravatar William Duclot1-0/+12
CSS is widely used, motivating it being included as a built-in pattern. It must be noted that the word_regex for CSS (i.e. the regex defining what is a word in the language) does not consider '.' and '#' characters (in CSS selectors) to be part of the word. This behavior is documented by the test t/t4018/css-rule. The logic behind this behavior is the following: identifiers in CSS selectors are identifiers in a HTML/XML document. Therefore, the '.'/'#' character are not part of the identifier, but an indicator of the nature of the identifier in HTML/XML (class or id). Diffing ".class1" and ".class2" must show that the class name is changed, but we still are selecting a class. Logic behind the "pattern" regex is: 1. reject lines ending with a colon/semicolon (properties) 2. if a line begins with a name in column 1, pick the whole line Credits to Johannes Sixt (j6t@kdbg.org) for the pattern regex and most of the tests. Signed-off-by: William Duclot <william.duclot@ensimag.grenoble-inp.fr> Signed-off-by: Matthieu Moy <matthieu.moy@grenoble-inp.fr> Reviewed-by: Johannes Sixt <j6t@kdbg.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-07-23userdiff: add support for Fountain documentsLibravatar Zoë Blade1-0/+2
Add support for Fountain, a plain text screenplay format. Git facilitates not just programming specifically, but creative writing in general, so it makes sense to also support other plain text documents besides source code. In the structure of a screenplay specifically, scenes are roughly analogous to functions, in the sense that it makes your job easier if you can see which ones were changed in a given range of patches. More information about the Fountain format can be found on its official website, at http://fountain.io . Signed-off-by: Zoë Blade <zoe@bytenoise.co.uk> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-02-13do not include the same header twiceLibravatar Дилян Палаузов1-1/+0
A few files include the same header file directly more than once. As all these headers protect themselves against repeated inclusion by the "#ifndef FOO_H / #define FOO_H / ... / #endif" idiom, leave only the first inclusion and remove the later inclusion as a no-op clean-up. Signed-off-by: Дилян Палаузов <git-dpa@aegee.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-03-21userdiff: have 'cpp' hunk header pattern catch more C++ anchor pointsLibravatar Johannes Sixt1-5/+3
The hunk header pattern 'cpp' is intended for C and C++ source code, but it is actually not particularly useful for the latter, and even misses some use-cases for the former. The parts of the pattern have the following flaws: - The first part matches an identifier followed immediately by a colon and arbitrary text and is intended to reject goto labels and C++ access specifiers (public, private, protected). But this pattern also rejects C++ constructs, which look like this: MyClass::MyClass() MyClass::~MyClass() MyClass::Item MyClass::Find(... - The second part matches an identifier followed by a list of qualified names (i.e. identifiers separated by the C++ scope operator '::') separated by space or '*' followed by an opening parenthesis (with space between the tokens). It matches function declarations like struct item* get_head(... int Outer::Inner::Func(... Since the pattern requires at least two identifiers, GNU-style function definitions are ignored: void func(... Moreover, since the pattern does not allow punctuation other than '*', the following C++ constructs are not recognized: . template definitions: template<class T> int func(T arg) . functions returning references: const string& get_message() . functions returning templated types: vector<int> foo() . operator definitions: Value operator+(Value l, Value r) - The third part of the pattern finally matches compound definitions. But it forgets about unions and namespaces, and also skips single-line definitions struct random_iterator_tag {}; because no semicolon can occur on the line. Change the first pattern to require a colon at the end of the line (except for trailing space and comments), so that it does not reject constructor or destructor definitions. Notice that all interesting anchor points begin with an identifier or keyword. But since there is a large variety of syntactical constructs after the first "word", the simplest is to require only this word and accept everything else. Therefore, this boils down to a line that begins with a letter or underscore (optionally preceded by the C++ scope operator '::' to accept functions returning a type anchored at the global namespace). Replace the second and third part by a single pattern that picks such a line. This has the following desirable consequence: - All constructs mentioned above are recognized. and the following likely desirable consequences: - Definitions of global variables and typedefs are recognized: int num_entries = 0; extern const char* help_text; typedef basic_string<wchar_t> wstring; - Commonly used marco-ized boilerplate code is recognized: BEGIN_MESSAGE_MAP(CCanvas,CWnd) Q_DECLARE_METATYPE(MyStruct) PATTERNS("tex",...) (The last one is from this very patch.) but also the following possibly undesirable consequence: - When a label is not on a line by itself (except for a comment) it is no longer rejected, but can appear as a hunk header if it occurs at the beginning of a line: next:; IMO, the benefits of the change outweigh the (possible) regressions by a large margin. Signed-off-by: Johannes Sixt <j6t@kdbg.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-03-21userdiff: support unsigned and long long suffixes of integer constantsLibravatar Johannes Sixt1-1/+1
Do not split constants such as 123U, 456ll, 789UL at the first U or second L. Signed-off-by: Johannes Sixt <j6t@kdbg.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-03-21userdiff: support C++ ->* and .* operators in the word regexpLibravatar Johannes Sixt1-1/+1
The character sequences ->* and .* are valid C++ operators. Keep them together in --word-diff mode. Signed-off-by: Johannes Sixt <j6t@kdbg.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-02-05userdiff: update Ada patternsLibravatar Adrian Johnson1-2/+2
- Allow extra space in "is new" and "is separate" - Fix bug in word regex for numbers Signed-off-by: Adrian Johnson <ajohnson@redneon.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-01-23userdiff: drop parse_driver functionLibravatar Jeff King1-29/+21
When we parse userdiff config, we generally assume that diff.name.key will affect the "key" value of the "name" driver. However, without confirming that the key is a valid userdiff key, we may accidentally conflict with the ancient "diff.color.*" namespace. The current code is careful not to even create a driver struct if we do not see a key that is known by the diff-driver code. However, this carefulness is unnecessary; the default driver with no keys set behaves exactly the same as having no driver at all. We can simply set up the driver struct as soon as we see we have a config key that looks like a driver. This makes the code a bit more readable. Signed-off-by: Jeff King <peff@peff.net> Reviewed-by: Jonathan Nieder <jrnieder@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-01-23convert some config callbacks to parse_config_keyLibravatar Jeff King1-10/+3
These callers can drop some inline pointer arithmetic and magic offset constants, making them more readable and less error-prone (those constants had to match the lengths of strings, but there is no automatic verification of that fact). The "ep" pointer (presumably for "end pointer"), which points to the final key segment of the config variable, is given the more standard name "key" to describe its function rather than its derivation. Signed-off-by: Jeff King <peff@peff.net> Reviewed-by: Jonathan Nieder <jrnieder@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-09-16Add userdiff patterns for AdaLibravatar Adrian Johnson1-0/+9
Add Ada xfuncname and wordRegex patterns to the list of builtin patterns. Signed-off-by: Adrian Johnson <ajohnson@redneon.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-02-07drop odd return value semantics from userdiff_configLibravatar Jeff King1-13/+6
When the userdiff_config function was introduced in be58e70 (diff: unify external diff and funcname parsing code, 2008-10-05), it used a return value convention unlike any other config callback. Like other callbacks, it used "-1" to signal error. But it returned "1" to indicate that it found something, and "0" otherwise; other callbacks simply returned "0" to indicate that no error occurred. This distinction was necessary at the time, because the userdiff namespace overlapped slightly with the color configuration namespace. So "diff.color.foo" could mean "the 'foo' slot of diff coloring" or "the 'foo' component of the "color" userdiff driver". Because the color-parsing code would die on an unknown color slot, we needed the userdiff code to indicate that it had matched the variable, letting us bypass the color-parsing code entirely. Later, in 8b8e862 (ignore unknown color configuration, 2009-12-12), the color-parsing code learned to silently ignore unknown slots. This means we no longer need to protect userdiff-matched variables from reaching the color-parsing code. We can therefore change the userdiff_config calling convention to a more normal one. This drops some code from each caller, which is nice. But more importantly, it reduces the cognitive load for readers who may wonder why userdiff_config is unlike every other config callback. There's no need to add a new test confirming that this works; t4020 already contains a test that sets diff.color.external. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-12-13Merge branch 'tr/userdiff-c-returns-pointer'Libravatar Junio C Hamano1-1/+1
* tr/userdiff-c-returns-pointer: userdiff: allow * between cpp funcname words
2011-12-06userdiff: allow * between cpp funcname wordsLibravatar Thomas Rast1-1/+1
The cpp pattern, used for C and C++, would not match the start of a declaration such as static char *prepare_index(int argc, because it did not allow for * anywhere between the various words that constitute the modifiers, type and function name. Fix it. Signed-off-by: Thomas Rast <trast@student.ethz.ch> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-11-15Add built-in diff patterns for MATLAB codeLibravatar Gustaf Hendeby1-0/+3
MATLAB is often used in industry and academia for scientific computations motivating it being included as a built-in pattern. Signed-off-by: Gustaf Hendeby <hendeby@isy.liu.se> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-08-04Rename git_checkattr() to git_check_attr()Libravatar Michael Haggerty1-1/+1
Suggested by: Junio Hamano <gitster@pobox.com> Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-06-29Merge branch 'jk/combine-diff-binary-etc'Libravatar Junio C Hamano1-0/+17
* jk/combine-diff-binary-etc: combine-diff: respect textconv attributes refactor get_textconv to not require diff_filespec combine-diff: handle binary files as binary combine-diff: calculate mode_differs earlier combine-diff: split header printing into its own function
2011-05-23refactor get_textconv to not require diff_filespecLibravatar Jeff King1-0/+17
This function actually does two things: 1. Load the userdiff driver for the filespec. 2. Decide whether the driver has a textconv component, and initialize the textconv cache if applicable. Only part (1) requires the filespec object, and some callers may not have a filespec at all. So let's split them it into two functions, and put part (2) with the userdiff code, which is a better fit. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-05-23userdiff/perl: tighten BEGIN/END block pattern to reject here-doc delimitersLibravatar Jonathan Nieder1-1/+1
A naive method of treating BEGIN/END blocks with a brace on the second line as diff/grep funcname context involves also matching unrelated lines that consist of all-caps letters: sub foo { print <<'EOF' text goes here ... EOF ... rest of foo ... } That's not so great, because it means that "git diff" and "git grep --show-function" would write "=EOF" or "@@ EOF" as context instead of a more useful reminder like "@@ sub foo {". To avoid this, tighten the pattern to only match the special block names that perl accepts (namely BEGIN, END, INIT, CHECK, UNITCHECK, AUTOLOAD, and DESTROY). The list is taken from perl's toke.c. Suggested-by: Jakub Narebski <jnareb@gmail.com> Signed-off-by: Jonathan Nieder <jrnieder@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-05-21userdiff/perl: catch sub with brace on second lineLibravatar Jonathan Nieder1-3/+17
Accept sub foo { } as an alternative to a more common style that introduces perl functions with a brace on the first line (and likewise for BEGIN/END blocks). The new regex is a little hairy to avoid matching # forward declaration sub foo; while continuing to match "sub foo($;@) {" and sub foo { # This routine is interesting; # in fact, the lines below explain how... While at it, pay attention to Perl 5.14's "package foo {" syntax as an alternative to the traditional "package foo;". Requested-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com> Signed-off-by: Jonathan Nieder <jrnieder@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-05-21userdiff/perl: match full line of POD headersLibravatar Jonathan Nieder1-1/+1
The builtin perl userdiff driver is not greedy enough about catching POD header lines. Capture the whole line, so instead of just declaring that we are in some "@@ =head1" section, diff/grep output can explain that the enclosing section is about "@@ =head1 OPTIONS". Reported-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com> Signed-off-by: Jonathan Nieder <jrnieder@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-05-21userdiff/perl: anchor "sub" and "package" patterns on the leftLibravatar Jonathan Nieder1-2/+2
The userdiff funcname mechanism has no concept of nested scopes --- instead, "git diff" and "git grep --show-function" simply label the diff header with the most recent matching line. Unfortunately that means text following a subroutine in a POD section: =head1 DESCRIPTION You might use this facility like so: sub example { foo; } Now, having said that, let's say more about the facility. Blah blah blah ... etc etc. gets the subroutine name instead of the POD header in its diff/grep funcname header, making it harder to get oriented when reading a diff without enough context. The fix is simple: anchor the funcname syntax to the left margin so nested subroutines and packages like this won't get picked up. (The builtin C++ funcname pattern already does the same thing.) This means the userdiff driver will misparse the idiom { my $static; sub foo { ... use $static ... } } but I think that's worth it; we can revisit this later if the userdiff mechanism learns to keep track of the beginning and end of nested scopes. Reported-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com> Signed-off-by: Jonathan Nieder <jrnieder@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-02-09Merge branch 'tr/diff-words-test'Libravatar Junio C Hamano1-24/+16
* tr/diff-words-test: t4034 (diff --word-diff): add a minimum Perl drier test vector t4034 (diff --word-diff): style suggestions userdiff: simplify word-diff safeguard t4034: bulk verify builtin word regex sanity
2011-01-24Merge branch 'as/userdiff-pascal'Libravatar Junio C Hamano1-1/+1
* as/userdiff-pascal: userdiff: match Pascal class methods
2011-01-18userdiff: simplify word-diff safeguardLibravatar Jonathan Nieder1-24/+16
git's diff-words support has a detail that can be a little dangerous: any text not matched by a given language's tokenization pattern is treated as whitespace and changes in such text would go unnoticed. Therefore each of the built-in regexes allows a special token type consisting of a single non-whitespace character [^[:space:]]. To make sure UTF-8 sequences remain human readable, the builtin regexes also have a special token type for runs of bytes with the high bit set. In English, non-ASCII characters are usually isolated so this is analogous to the [^[:space:]] pattern, except it matches a single _multibyte_ character despite use of the C locale. Unfortunately it is easy to make typos or forget entirely to include these catch-all token types when adding support for new languages (see v1.7.3.5~16, userdiff: fix typo in ruby and python word regexes, 2010-12-18). Avoid this by including them automatically within the PATTERNS and IPATTERN macros. While at it, change the UTF-8 sequence token type to match exactly one non-ASCII multi-byte character, rather than an arbitrary run of them. Suggested-by: Thomas Rast <trast@student.ethz.ch> Signed-off-by: Jonathan Nieder <jrnieder@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-01-11userdiff: match Pascal class methodsLibravatar Alexey Shumkin1-1/+1
Class declarations were already covered by the second pattern, but class methods have the 'class' keyword in front too. Account for it. Signed-off-by: Alexey Shumkin <zapped@mail.ru> Acked-by: Thomas Rast <trast@student.ethz.ch> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-12-27userdiff/perl: catch BEGIN/END/... and POD as headersLibravatar Junio C Hamano1-1/+3
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-12-27diff: funcname and word patterns for perlLibravatar Jonathan Nieder1-0/+15
The default function name discovery already works quite well for Perl code... with the exception of here-documents (or rather their ending). sub foo { print <<END here-document END return 1; } The default funcname pattern treats the unindented END line as a function declaration and puts it in the @@ line of diff and "grep --show-function" output. With a little knowledge of perl syntax, we can do better. You can try it out by adding "*.perl diff=perl" to the gitattributes file. Signed-off-by: Jonathan Nieder <jrnieder@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-12-18userdiff: fix typo in ruby and python word regexesLibravatar Thomas Rast1-2/+2
Both had an unclosed ] that ruined the safeguard against not matching a non-space char. Signed-off-by: Thomas Rast <trast@student.ethz.ch> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-09-10userdiff.c: add builtin fortran regex patternsLibravatar Brandon Casey1-0/+17
This adds fortran xfuncname and wordRegex patterns to the list of builtin patterns. The intention is for the patterns to be appropriate for all versions of fortran including 77, 90, 95. The patterns can be enabled by adding the diff=fortran attribute to the .gitattributes file for the desired file glob. This also adds a new macro named IPATTERN which is just like the PATTERNS macro except it sets the REG_ICASE flag so that case will be ignored. The test code in t4018 and the docs were updated as appropriate. Signed-off-by: Brandon Casey <casey@nrlssc.navy.mil> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-08-16Userdiff patterns for C#Libravatar Petr Onderka1-0/+16
Add userdiff patterns for C#. This code is an improved version of code by Adam Petaccia from 21 June 2009 mail to the list. Signed-off-by: Petr Onderka <gsvick@gmail.com> Acked-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-06-13Merge branch 'bs/userdiff-php'Libravatar Junio C Hamano1-1/+3
* bs/userdiff-php: diff: Support visibility modifiers in the PHP hunk header regexp
2010-05-27diff: Support visibility modifiers in the PHP hunk header regexpLibravatar Björn Steinbrink1-1/+3
Starting with PHP5, class methods can have a visibility modifier, which caused the methods not to be matched by the existing regexp, so extend the regexp to match those modifiers. And while we're at it, allow the "static" modifier as well. Since the "static" modifier can appear either before or after the visibility modifier, let's just allow any number of modifiers to appear in any order, as that simplifies the regexp and shouldn't cause any false positives. Signed-off-by: Björn Steinbrink <B.Steinbrink@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-04-02diff: cache textconv outputLibravatar Jeff King1-0/+9
Running a textconv filter can take a long time. It's particularly bad for a large file which needs to be spooled to disk, but even for small files, the fork+exec overhead can add up for something like "git log -p". This patch uses the notes-cache mechanism to keep a fast cache of textconv output. Caches are stored in refs/notes/textconv/$x, where $x is the userdiff driver defined in gitattributes. Caching is enabled only if diff.$x.cachetextconv is true. In my test repo, on a commit with 45 jpg and avi files changed and a textconv to show their exif tags: [before] $ time git show >/dev/null real 0m13.724s user 0m12.057s sys 0m1.624s [after, first run] $ git config diff.mfo.cachetextconv true $ time git show >/dev/null real 0m14.252s user 0m12.197s sys 0m1.800s [after, subsequent runs] $ time git show >/dev/null real 0m0.352s user 0m0.148s sys 0m0.200s So for a slight (3.8%) cost on the first run, we achieve an almost 40x speed up on subsequent runs. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-01-16git_attr(): fix function signatureLibravatar Junio C Hamano1-1/+1
The function took (name, namelen) as its arguments, but all the public callers wanted to pass a full string. Demote the counted-string interface to an internal API status, and allow public callers to just pass the string to the function. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-06-18avoid exponential regex match for java and objc function namesLibravatar Paolo Bonzini1-2/+3
In the old regex ^[ \t]*(([ \t]*[A-Za-z_][A-Za-z_0-9]*){2,}[ \t]*\([^;]*)$ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ you can backtrack arbitrarily from [A-Za-z_0-9]* into [A-Za-z_], thus causing an exponential number of backtracks. Ironically it also causes the regex not to work as intended; for example "catch" can match the underlined part of the regex, the first repetition matching "c" and the second matching "atch". The replacement regex avoids this problem, because it makes sure that at least a space/tab is eaten on each repetition. In other words, a suffix of a repetition can never be a prefix of the next repetition. Signed-off-by: Paolo Bonzini <bonzini@gnu.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-01-21Change the spelling of "wordregex".Libravatar Boyd Stephen Smith Jr1-2/+2
Use "wordRegex" for configuration variable names. Use "word_regex" for C language tokens. Signed-off-by: Boyd Stephen Smith Jr. <bss@iguanasuicide.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-01-17color-words: make regex configurable via attributesLibravatar Thomas Rast1-15/+63
Make the --color-words splitting regular expression configurable via the diff driver's 'wordregex' attribute. The user can then set the driver on a file in .gitattributes. If a regex is given on the command line, it overrides the driver's setting. We also provide built-in regexes for the languages that already had funcname patterns, and add an appropriate diff driver entry for C/++. (The patterns are designed to run UTF-8 sequences into a single chunk to make sure they remain readable.) Signed-off-by: Thomas Rast <trast@student.ethz.ch> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-10-26userdiff: require explicitly allowing textconvLibravatar Jeff King1-9/+1
Diffs that have been produced with textconv almost certainly cannot be applied, so we want to be careful not to generate them in things like format-patch. This introduces a new diff options, ALLOW_TEXTCONV, which controls this behavior. It is off by default, but is explicitly turned on for the "log" family of commands, as well as the "diff" porcelain (but not diff-* plumbing). Because both text conversion and external diffing are controlled by these diff options, we can get rid of the "plumbing versus porcelain" distinction when reading the config. This was an attempt to control the same thing, but suffered from being too coarse-grained. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-10-18diff: add filter for converting binary to textLibravatar Jeff King1-0/+2
When diffing binary files, it is sometimes nice to see the differences of a canonical text form rather than either a binary patch or simply "binary files differ." Until now, the only option for doing this was to define an external diff command to perform the diff. This was a lot of work, since the external command needed to take care of doing the diff itself (including mode changes), and lost the benefit of git's colorization and other options. This patch adds a text conversion option, which converts a file to its canonical format before performing the diff. This is less flexible than an arbitrary external diff, but is much less work to set up. For example: $ echo '*.jpg diff=exif' >>.gitattributes $ git config diff.exif.textconv exiftool $ git config diff.exif.binary false allows one to see jpg diffs represented by the text output of exiftool. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Shawn O. Pearce <spearce@spearce.org>