From 526a858a99ace6698823740374edc3e35b87901a Mon Sep 17 00:00:00 2001 From: =?utf8?q?Ren=C3=A9=20Scharfe?= Date: Sun, 20 May 2012 16:33:07 +0200 Subject: [PATCH] grep: support newline separated pattern list Currently, patterns that contain newline characters don't match anything when given to git grep. Regular grep(1) interprets patterns as lists of newline separated search strings instead. Implement this functionality by creating and inserting extra grep_pat structures for patterns consisting of multiple lines when appending to the pattern lists. For simplicity, all pattern strings are duplicated. The original pattern is truncated in place to make it contain only the first line. Requested-by: Torne (Richard Coles) Signed-off-by: Rene Scharfe Signed-off-by: Junio C Hamano --- Documentation/git-grep.txt | 4 +++- grep.c | 33 ++++++++++++++++++++++++++++++++- grep.h | 2 +- t/t7810-grep.sh | 5 +++++ 4 files changed, 41 insertions(+), 3 deletions(-) diff --git a/Documentation/git-grep.txt b/Documentation/git-grep.txt index e150c77cff..c3306f3a3b 100644 --- a/Documentation/git-grep.txt +++ b/Documentation/git-grep.txt @@ -29,7 +29,9 @@ SYNOPSIS DESCRIPTION ----------- Look for specified patterns in the tracked files in the work tree, blobs -registered in the index file, or blobs in given tree objects. +registered in the index file, or blobs in given tree objects. Patterns +are lists of one or more search expressions separated by newline +characters. An empty string as search expression matches all lines. CONFIGURATION diff --git a/grep.c b/grep.c index c35a7ce57d..02258039d9 100644 --- a/grep.c +++ b/grep.c @@ -9,7 +9,7 @@ static struct grep_pat *create_grep_pat(const char *pat, size_t patlen, enum grep_header_field field) { struct grep_pat *p = xcalloc(1, sizeof(*p)); - p->pattern = pat; + p->pattern = xmemdupz(pat, patlen); p->patternlen = patlen; p->origin = origin; p->no = no; @@ -23,6 +23,36 @@ static void do_append_grep_pat(struct grep_pat ***tail, struct grep_pat *p) **tail = p; *tail = &p->next; p->next = NULL; + + switch (p->token) { + case GREP_PATTERN: /* atom */ + case GREP_PATTERN_HEAD: + case GREP_PATTERN_BODY: + for (;;) { + struct grep_pat *new_pat; + size_t len = 0; + char *cp = p->pattern + p->patternlen, *nl = NULL; + while (++len <= p->patternlen) { + if (*(--cp) == '\n') { + nl = cp; + break; + } + } + if (!nl) + break; + new_pat = create_grep_pat(nl + 1, len - 1, p->origin, + p->no, p->token, p->field); + new_pat->next = p->next; + if (!p->next) + *tail = &new_pat->next; + p->next = new_pat; + *nl = '\0'; + p->patternlen -= len; + } + break; + default: + break; + } } void append_header_grep_pattern(struct grep_opt *opt, @@ -408,6 +438,7 @@ void free_grep_patterns(struct grep_opt *opt) free_pcre_regexp(p); else regfree(&p->regexp); + free(p->pattern); break; default: break; diff --git a/grep.h b/grep.h index cd055cdfa8..5b083affe1 100644 --- a/grep.h +++ b/grep.h @@ -35,7 +35,7 @@ struct grep_pat { const char *origin; int no; enum grep_pat_token token; - const char *pattern; + char *pattern; size_t patternlen; enum grep_header_field field; regex_t regexp; diff --git a/t/t7810-grep.sh b/t/t7810-grep.sh index 6379ad60bc..bc9a522085 100755 --- a/t/t7810-grep.sh +++ b/t/t7810-grep.sh @@ -322,6 +322,11 @@ test_expect_success 'grep -f, multiple patterns' ' test_cmp expected actual ' +test_expect_success 'grep, multiple patterns' ' + git grep "$(cat patterns)" >actual && + test_cmp expected actual +' + cat >expected <