git/grep.c, branch v2.10.2

Merge branch 'js/regexec-buf' into maint

2016-09-29T23:49:45Z

Some codepaths in "git diff" used regexec(3) on a buffer that was mmap(2)ed, which may not have a terminating NUL, leading to a read beyond the end of the mapped region. This was fixed by introducing a regexec_buf() helper that takes a pair with REG_STARTEND extension. * js/regexec-buf: regex: use regexec_buf() regex: add regexec_buf() that can work on a non NUL-terminated string regex: -G feeds a non NUL-terminated string to regexec() and fails

regex: use regexec_buf()

2016-09-21T20:56:15Z

The new regexec_buf() function operates on buffers with an explicitly specified length, rather than NUL-terminated strings. We need to use this function whenever the buffer we want to pass to regexec(3) may have been mmap(2)ed (and is hence not NUL-terminated). Note: the original motivation for this patch was to fix a bug where `git diff -G ` would crash. This patch converts more callers, though, some of which allocated to construct NUL-terminated strings, or worse, modified buffers to temporarily insert NULs while calling regexec(3). By converting them to use regexec_buf(), the code has become much cleaner. Signed-off-by: Johannes Schindelin Signed-off-by: Junio C Hamano

Merge branch 'js/am-3-merge-recursive-direct'

2016-08-10T19:33:20Z

"git am -3" calls "git merge-recursive" when it needs to fall back to a three-way merge; this call has been turned into an internal subroutine call instead of spawning a separate subprocess. * js/am-3-merge-recursive-direct: merge-recursive: flush output buffer even when erroring out merge_trees(): ensure that the callers release output buffer merge-recursive: offer an option to retain the output in 'obuf' merge-recursive: write the commit title in one go merge-recursive: flush output buffer before printing error messages am -3: use merge_recursive() directly again merge-recursive: switch to returning errors instead of dying merge-recursive: handle return values indicating errors merge-recursive: allow write_tree_from_memory() to error out merge-recursive: avoid returning a wholesale struct merge_recursive: abort properly upon errors prepare the builtins for a libified merge_recursive() merge-recursive: clarify code in was_tracked() die(_("BUG")): avoid translating bug messages die("bug"): report bugs consistently t5520: verify that `pull --rebase` shows the helpful advice when failing

Merge branch 'jc/grep-commandline-vs-configuration'

2016-08-04T21:39:18Z

"git -c grep.patternType=extended log --basic-regexp" misbehaved because the internal API to access the grep machinery was not designed well. * jc/grep-commandline-vs-configuration: grep: further simplify setting the pattern type

die("bug"): report bugs consistently

2016-07-26T18:13:44Z

The vast majority of error messages in Git's source code which report a bug use the convention to prefix the message with "BUG:". As part of cleaning up merge-recursive to stop die()ing except in case of detected bugs, let's just make the remainder of the bug reports consistent with the de facto rule. Signed-off-by: Johannes Schindelin Signed-off-by: Junio C Hamano

grep: further simplify setting the pattern type

2016-07-25T16:16:18Z

When c5c31d33 (grep: move pattern-type bits support to top-level grep.[ch], 2012-10-03) introduced grep_commit_pattern_type() helper function, the intention was to allow the users of grep API to having to fiddle only with .pattern_type_option (which can be set to "fixed", "basic", "extended", and "pcre"), and then immediately before compiling the pattern strings for use, call grep_commit_pattern_type() to have it prepare various bits in the grep_opt structure (like .fixed, .regflags, etc.). However, grep_set_pattern_type_option() helper function the grep API internally uses were left as an external function by mistake. This function shouldn't have been made callable by the users of the API. Later when the grep API was used in revision traversal machinery, the caller then mistakenly started calling the function around 34a4ae55 (log --grep: use the same helper to set -E/-F options as "git grep", 2012-10-03), instead of setting the .pattern_type_option field and letting the grep_commit_pattern_type() to take care of the details. This caused an unnecessary bug that made a configured grep.patternType take precedence over the command line options (e.g. --basic-regexp, --fixed-strings) in "git log" family of commands. Signed-off-by: Junio C Hamano

Merge branch 'nd/icase'

2016-07-19T20:22:17Z

"git grep -i" has been taught to fold case in non-ascii locales correctly. * nd/icase: grep.c: reuse "icase" variable diffcore-pickaxe: support case insensitive match on non-ascii diffcore-pickaxe: Add regcomp_or_die() grep/pcre: support utf-8 gettext: add is_utf8_locale() grep/pcre: prepare locale-dependent tables for icase matching grep: rewrite an if/else condition to avoid duplicate expression grep/icase: avoid kwsset when -F is specified grep/icase: avoid kwsset on literal non-ascii strings test-regex: expose full regcomp() to the command line test-regex: isolate the bug test code grep: break down an "if" stmt in preparation for next changes

grep.c: reuse "icase" variable

2016-07-01T19:44:57Z

Signed-off-by: Nguyễn Thái Ngọc Duy Signed-off-by: Junio C Hamano

grep/pcre: support utf-8

2016-07-01T19:44:57Z

In the previous change in this function, we add locale support for single-byte encodings only. It looks like pcre only supports utf-* as multibyte encodings, the others are left in the cold (which is fine). We need to enable PCRE_UTF8 so pcre can find character boundary correctly. It's needed for case folding (when --ignore-case is used) or '*', '+' or similar syntax is used. The "has_non_ascii()" check is to be on the conservative side. If there's non-ascii in the pattern, the searched content could still be in utf-8, but we can treat it just like a byte stream and everything should work. If we force utf-8 based on locale only and pcre validates utf-8 and the file content is in non-utf8 encoding, things break. Noticed-by: Plamen Totev Helped-by: Plamen Totev Signed-off-by: Nguyễn Thái Ngọc Duy Signed-off-by: Junio C Hamano

grep/pcre: prepare locale-dependent tables for icase matching

2016-07-01T19:44:57Z

The default tables are usually built with C locale and only suitable for LANG=C or similar. This should make case insensitive search work correctly for all single-byte charsets. Signed-off-by: Nguyễn Thái Ngọc Duy Signed-off-by: Junio C Hamano