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![Shawn Pearce](/assets/img/avatar_default.png)
Like xmalloc and xrealloc xstrdup dies with a useful message if the native strdup() implementation returns NULL rather than a valid pointer. I just tried to use xstrdup in new code and found it to be missing. However I expected it to be present as xmalloc and xrealloc are already commonly used throughout the code. [jc: removed the part that deals with last_XXX, which I am finding more and more dubious these days.] Signed-off-by: Shawn O. Pearce <spearce@spearce.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
1178 lines
26 KiB
C
1178 lines
26 KiB
C
/*
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* Builtin "git grep"
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*
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* Copyright (c) 2006 Junio C Hamano
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*/
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#include "cache.h"
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#include "blob.h"
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#include "tree.h"
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#include "commit.h"
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#include "tag.h"
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#include "tree-walk.h"
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#include "builtin.h"
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#include <regex.h>
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#include <fnmatch.h>
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#include <sys/wait.h>
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/*
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* git grep pathspecs are somewhat different from diff-tree pathspecs;
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* pathname wildcards are allowed.
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*/
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static int pathspec_matches(const char **paths, const char *name)
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{
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int namelen, i;
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if (!paths || !*paths)
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return 1;
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namelen = strlen(name);
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for (i = 0; paths[i]; i++) {
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const char *match = paths[i];
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int matchlen = strlen(match);
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const char *cp, *meta;
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if (!matchlen ||
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((matchlen <= namelen) &&
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!strncmp(name, match, matchlen) &&
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(match[matchlen-1] == '/' ||
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name[matchlen] == '\0' || name[matchlen] == '/')))
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return 1;
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if (!fnmatch(match, name, 0))
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return 1;
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if (name[namelen-1] != '/')
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continue;
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/* We are being asked if the directory ("name") is worth
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* descending into.
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*
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* Find the longest leading directory name that does
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* not have metacharacter in the pathspec; the name
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* we are looking at must overlap with that directory.
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*/
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for (cp = match, meta = NULL; cp - match < matchlen; cp++) {
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char ch = *cp;
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if (ch == '*' || ch == '[' || ch == '?') {
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meta = cp;
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break;
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}
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}
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if (!meta)
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meta = cp; /* fully literal */
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if (namelen <= meta - match) {
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/* Looking at "Documentation/" and
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* the pattern says "Documentation/howto/", or
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* "Documentation/diff*.txt". The name we
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* have should match prefix.
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*/
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if (!memcmp(match, name, namelen))
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return 1;
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continue;
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}
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if (meta - match < namelen) {
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/* Looking at "Documentation/howto/" and
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* the pattern says "Documentation/h*";
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* match up to "Do.../h"; this avoids descending
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* into "Documentation/technical/".
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*/
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if (!memcmp(match, name, meta - match))
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return 1;
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continue;
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}
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}
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return 0;
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}
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enum grep_pat_token {
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GREP_PATTERN,
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GREP_AND,
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GREP_OPEN_PAREN,
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GREP_CLOSE_PAREN,
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GREP_NOT,
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GREP_OR,
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};
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struct grep_pat {
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struct grep_pat *next;
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const char *origin;
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int no;
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enum grep_pat_token token;
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const char *pattern;
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regex_t regexp;
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};
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enum grep_expr_node {
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GREP_NODE_ATOM,
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GREP_NODE_NOT,
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GREP_NODE_AND,
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GREP_NODE_OR,
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};
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struct grep_expr {
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enum grep_expr_node node;
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union {
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struct grep_pat *atom;
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struct grep_expr *unary;
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struct {
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struct grep_expr *left;
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struct grep_expr *right;
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} binary;
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} u;
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};
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struct grep_opt {
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struct grep_pat *pattern_list;
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struct grep_pat **pattern_tail;
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struct grep_expr *pattern_expression;
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int prefix_length;
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regex_t regexp;
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unsigned linenum:1;
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unsigned invert:1;
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unsigned name_only:1;
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unsigned unmatch_name_only:1;
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unsigned count:1;
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unsigned word_regexp:1;
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unsigned fixed:1;
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#define GREP_BINARY_DEFAULT 0
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#define GREP_BINARY_NOMATCH 1
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#define GREP_BINARY_TEXT 2
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unsigned binary:2;
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unsigned extended:1;
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unsigned relative:1;
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int regflags;
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unsigned pre_context;
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unsigned post_context;
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};
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static void add_pattern(struct grep_opt *opt, const char *pat,
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const char *origin, int no, enum grep_pat_token t)
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{
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struct grep_pat *p = xcalloc(1, sizeof(*p));
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p->pattern = pat;
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p->origin = origin;
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p->no = no;
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p->token = t;
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*opt->pattern_tail = p;
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opt->pattern_tail = &p->next;
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p->next = NULL;
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}
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static void compile_regexp(struct grep_pat *p, struct grep_opt *opt)
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{
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int err = regcomp(&p->regexp, p->pattern, opt->regflags);
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if (err) {
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char errbuf[1024];
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char where[1024];
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if (p->no)
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sprintf(where, "In '%s' at %d, ",
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p->origin, p->no);
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else if (p->origin)
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sprintf(where, "%s, ", p->origin);
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else
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where[0] = 0;
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regerror(err, &p->regexp, errbuf, 1024);
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regfree(&p->regexp);
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die("%s'%s': %s", where, p->pattern, errbuf);
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}
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}
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static struct grep_expr *compile_pattern_expr(struct grep_pat **);
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static struct grep_expr *compile_pattern_atom(struct grep_pat **list)
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{
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struct grep_pat *p;
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struct grep_expr *x;
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p = *list;
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switch (p->token) {
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case GREP_PATTERN: /* atom */
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x = xcalloc(1, sizeof (struct grep_expr));
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x->node = GREP_NODE_ATOM;
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x->u.atom = p;
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*list = p->next;
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return x;
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case GREP_OPEN_PAREN:
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*list = p->next;
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x = compile_pattern_expr(list);
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if (!x)
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return NULL;
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if (!*list || (*list)->token != GREP_CLOSE_PAREN)
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die("unmatched parenthesis");
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*list = (*list)->next;
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return x;
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default:
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return NULL;
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}
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}
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static struct grep_expr *compile_pattern_not(struct grep_pat **list)
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{
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struct grep_pat *p;
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struct grep_expr *x;
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p = *list;
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switch (p->token) {
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case GREP_NOT:
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if (!p->next)
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die("--not not followed by pattern expression");
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*list = p->next;
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x = xcalloc(1, sizeof (struct grep_expr));
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x->node = GREP_NODE_NOT;
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x->u.unary = compile_pattern_not(list);
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if (!x->u.unary)
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die("--not followed by non pattern expression");
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return x;
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default:
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return compile_pattern_atom(list);
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}
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}
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static struct grep_expr *compile_pattern_and(struct grep_pat **list)
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{
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struct grep_pat *p;
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struct grep_expr *x, *y, *z;
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x = compile_pattern_not(list);
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p = *list;
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if (p && p->token == GREP_AND) {
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if (!p->next)
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die("--and not followed by pattern expression");
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*list = p->next;
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y = compile_pattern_and(list);
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if (!y)
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die("--and not followed by pattern expression");
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z = xcalloc(1, sizeof (struct grep_expr));
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z->node = GREP_NODE_AND;
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z->u.binary.left = x;
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z->u.binary.right = y;
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return z;
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}
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return x;
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}
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static struct grep_expr *compile_pattern_or(struct grep_pat **list)
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{
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struct grep_pat *p;
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struct grep_expr *x, *y, *z;
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x = compile_pattern_and(list);
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p = *list;
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if (x && p && p->token != GREP_CLOSE_PAREN) {
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y = compile_pattern_or(list);
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if (!y)
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die("not a pattern expression %s", p->pattern);
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z = xcalloc(1, sizeof (struct grep_expr));
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z->node = GREP_NODE_OR;
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z->u.binary.left = x;
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z->u.binary.right = y;
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return z;
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}
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return x;
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}
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static struct grep_expr *compile_pattern_expr(struct grep_pat **list)
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{
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return compile_pattern_or(list);
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}
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static void compile_patterns(struct grep_opt *opt)
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{
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struct grep_pat *p;
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/* First compile regexps */
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for (p = opt->pattern_list; p; p = p->next) {
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if (p->token == GREP_PATTERN)
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compile_regexp(p, opt);
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else
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opt->extended = 1;
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}
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if (!opt->extended)
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return;
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/* Then bundle them up in an expression.
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* A classic recursive descent parser would do.
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*/
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p = opt->pattern_list;
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opt->pattern_expression = compile_pattern_expr(&p);
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if (p)
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die("incomplete pattern expression: %s", p->pattern);
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}
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static char *end_of_line(char *cp, unsigned long *left)
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{
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unsigned long l = *left;
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while (l && *cp != '\n') {
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l--;
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cp++;
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}
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*left = l;
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return cp;
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}
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static int word_char(char ch)
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{
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return isalnum(ch) || ch == '_';
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}
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static void show_line(struct grep_opt *opt, const char *bol, const char *eol,
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const char *name, unsigned lno, char sign)
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{
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printf("%s%c", name, sign);
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if (opt->linenum)
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printf("%d%c", lno, sign);
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printf("%.*s\n", (int)(eol-bol), bol);
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}
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/*
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* NEEDSWORK: share code with diff.c
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*/
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#define FIRST_FEW_BYTES 8000
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static int buffer_is_binary(const char *ptr, unsigned long size)
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{
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if (FIRST_FEW_BYTES < size)
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size = FIRST_FEW_BYTES;
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return !!memchr(ptr, 0, size);
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}
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static int fixmatch(const char *pattern, char *line, regmatch_t *match)
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{
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char *hit = strstr(line, pattern);
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if (!hit) {
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match->rm_so = match->rm_eo = -1;
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return REG_NOMATCH;
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}
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else {
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match->rm_so = hit - line;
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match->rm_eo = match->rm_so + strlen(pattern);
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return 0;
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}
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}
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static int match_one_pattern(struct grep_opt *opt, struct grep_pat *p, char *bol, char *eol)
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{
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int hit = 0;
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int at_true_bol = 1;
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regmatch_t pmatch[10];
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again:
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if (!opt->fixed) {
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regex_t *exp = &p->regexp;
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hit = !regexec(exp, bol, ARRAY_SIZE(pmatch),
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pmatch, 0);
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}
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else {
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hit = !fixmatch(p->pattern, bol, pmatch);
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}
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if (hit && opt->word_regexp) {
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if ((pmatch[0].rm_so < 0) ||
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(eol - bol) <= pmatch[0].rm_so ||
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(pmatch[0].rm_eo < 0) ||
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(eol - bol) < pmatch[0].rm_eo)
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die("regexp returned nonsense");
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/* Match beginning must be either beginning of the
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* line, or at word boundary (i.e. the last char must
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* not be a word char). Similarly, match end must be
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* either end of the line, or at word boundary
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* (i.e. the next char must not be a word char).
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*/
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if ( ((pmatch[0].rm_so == 0 && at_true_bol) ||
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!word_char(bol[pmatch[0].rm_so-1])) &&
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((pmatch[0].rm_eo == (eol-bol)) ||
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!word_char(bol[pmatch[0].rm_eo])) )
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;
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else
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hit = 0;
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if (!hit && pmatch[0].rm_so + bol + 1 < eol) {
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/* There could be more than one match on the
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* line, and the first match might not be
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* strict word match. But later ones could be!
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*/
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bol = pmatch[0].rm_so + bol + 1;
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at_true_bol = 0;
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goto again;
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}
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}
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return hit;
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}
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static int match_expr_eval(struct grep_opt *opt,
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struct grep_expr *x,
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char *bol, char *eol)
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{
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switch (x->node) {
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case GREP_NODE_ATOM:
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return match_one_pattern(opt, x->u.atom, bol, eol);
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break;
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case GREP_NODE_NOT:
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return !match_expr_eval(opt, x->u.unary, bol, eol);
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case GREP_NODE_AND:
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return (match_expr_eval(opt, x->u.binary.left, bol, eol) &&
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match_expr_eval(opt, x->u.binary.right, bol, eol));
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case GREP_NODE_OR:
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return (match_expr_eval(opt, x->u.binary.left, bol, eol) ||
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match_expr_eval(opt, x->u.binary.right, bol, eol));
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}
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die("Unexpected node type (internal error) %d\n", x->node);
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}
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static int match_expr(struct grep_opt *opt, char *bol, char *eol)
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{
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struct grep_expr *x = opt->pattern_expression;
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return match_expr_eval(opt, x, bol, eol);
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}
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static int match_line(struct grep_opt *opt, char *bol, char *eol)
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{
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struct grep_pat *p;
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if (opt->extended)
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return match_expr(opt, bol, eol);
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for (p = opt->pattern_list; p; p = p->next) {
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if (match_one_pattern(opt, p, bol, eol))
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return 1;
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}
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return 0;
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}
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static int grep_buffer(struct grep_opt *opt, const char *name,
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char *buf, unsigned long size)
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{
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char *bol = buf;
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unsigned long left = size;
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unsigned lno = 1;
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struct pre_context_line {
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char *bol;
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char *eol;
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} *prev = NULL, *pcl;
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unsigned last_hit = 0;
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unsigned last_shown = 0;
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int binary_match_only = 0;
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const char *hunk_mark = "";
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unsigned count = 0;
|
|
|
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if (buffer_is_binary(buf, size)) {
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switch (opt->binary) {
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case GREP_BINARY_DEFAULT:
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binary_match_only = 1;
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break;
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case GREP_BINARY_NOMATCH:
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return 0; /* Assume unmatch */
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break;
|
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default:
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break;
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}
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}
|
|
|
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if (opt->pre_context)
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prev = xcalloc(opt->pre_context, sizeof(*prev));
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if (opt->pre_context || opt->post_context)
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hunk_mark = "--\n";
|
|
|
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while (left) {
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char *eol, ch;
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int hit = 0;
|
|
|
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eol = end_of_line(bol, &left);
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ch = *eol;
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*eol = 0;
|
|
|
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hit = match_line(opt, bol, eol);
|
|
|
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/* "grep -v -e foo -e bla" should list lines
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* that do not have either, so inversion should
|
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* be done outside.
|
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*/
|
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if (opt->invert)
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hit = !hit;
|
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if (opt->unmatch_name_only) {
|
|
if (hit)
|
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return 0;
|
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goto next_line;
|
|
}
|
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if (hit) {
|
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count++;
|
|
if (binary_match_only) {
|
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printf("Binary file %s matches\n", name);
|
|
return 1;
|
|
}
|
|
if (opt->name_only) {
|
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printf("%s\n", name);
|
|
return 1;
|
|
}
|
|
/* Hit at this line. If we haven't shown the
|
|
* pre-context lines, we would need to show them.
|
|
* When asked to do "count", this still show
|
|
* the context which is nonsense, but the user
|
|
* deserves to get that ;-).
|
|
*/
|
|
if (opt->pre_context) {
|
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unsigned from;
|
|
if (opt->pre_context < lno)
|
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from = lno - opt->pre_context;
|
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else
|
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from = 1;
|
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if (from <= last_shown)
|
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from = last_shown + 1;
|
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if (last_shown && from != last_shown + 1)
|
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printf(hunk_mark);
|
|
while (from < lno) {
|
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pcl = &prev[lno-from-1];
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show_line(opt, pcl->bol, pcl->eol,
|
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name, from, '-');
|
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from++;
|
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}
|
|
last_shown = lno-1;
|
|
}
|
|
if (last_shown && lno != last_shown + 1)
|
|
printf(hunk_mark);
|
|
if (!opt->count)
|
|
show_line(opt, bol, eol, name, lno, ':');
|
|
last_shown = last_hit = lno;
|
|
}
|
|
else if (last_hit &&
|
|
lno <= last_hit + opt->post_context) {
|
|
/* If the last hit is within the post context,
|
|
* we need to show this line.
|
|
*/
|
|
if (last_shown && lno != last_shown + 1)
|
|
printf(hunk_mark);
|
|
show_line(opt, bol, eol, name, lno, '-');
|
|
last_shown = lno;
|
|
}
|
|
if (opt->pre_context) {
|
|
memmove(prev+1, prev,
|
|
(opt->pre_context-1) * sizeof(*prev));
|
|
prev->bol = bol;
|
|
prev->eol = eol;
|
|
}
|
|
|
|
next_line:
|
|
*eol = ch;
|
|
bol = eol + 1;
|
|
if (!left)
|
|
break;
|
|
left--;
|
|
lno++;
|
|
}
|
|
|
|
if (opt->unmatch_name_only) {
|
|
/* We did not see any hit, so we want to show this */
|
|
printf("%s\n", name);
|
|
return 1;
|
|
}
|
|
|
|
/* NEEDSWORK:
|
|
* The real "grep -c foo *.c" gives many "bar.c:0" lines,
|
|
* which feels mostly useless but sometimes useful. Maybe
|
|
* make it another option? For now suppress them.
|
|
*/
|
|
if (opt->count && count)
|
|
printf("%s:%u\n", name, count);
|
|
return !!last_hit;
|
|
}
|
|
|
|
static int grep_sha1(struct grep_opt *opt, const unsigned char *sha1, const char *name, int tree_name_len)
|
|
{
|
|
unsigned long size;
|
|
char *data;
|
|
char type[20];
|
|
char *to_free = NULL;
|
|
int hit;
|
|
|
|
data = read_sha1_file(sha1, type, &size);
|
|
if (!data) {
|
|
error("'%s': unable to read %s", name, sha1_to_hex(sha1));
|
|
return 0;
|
|
}
|
|
if (opt->relative && opt->prefix_length) {
|
|
static char name_buf[PATH_MAX];
|
|
char *cp;
|
|
int name_len = strlen(name) - opt->prefix_length + 1;
|
|
|
|
if (!tree_name_len)
|
|
name += opt->prefix_length;
|
|
else {
|
|
if (ARRAY_SIZE(name_buf) <= name_len)
|
|
cp = to_free = xmalloc(name_len);
|
|
else
|
|
cp = name_buf;
|
|
memcpy(cp, name, tree_name_len);
|
|
strcpy(cp + tree_name_len,
|
|
name + tree_name_len + opt->prefix_length);
|
|
name = cp;
|
|
}
|
|
}
|
|
hit = grep_buffer(opt, name, data, size);
|
|
free(data);
|
|
free(to_free);
|
|
return hit;
|
|
}
|
|
|
|
static int grep_file(struct grep_opt *opt, const char *filename)
|
|
{
|
|
struct stat st;
|
|
int i;
|
|
char *data;
|
|
if (lstat(filename, &st) < 0) {
|
|
err_ret:
|
|
if (errno != ENOENT)
|
|
error("'%s': %s", filename, strerror(errno));
|
|
return 0;
|
|
}
|
|
if (!st.st_size)
|
|
return 0; /* empty file -- no grep hit */
|
|
if (!S_ISREG(st.st_mode))
|
|
return 0;
|
|
i = open(filename, O_RDONLY);
|
|
if (i < 0)
|
|
goto err_ret;
|
|
data = xmalloc(st.st_size + 1);
|
|
if (st.st_size != xread(i, data, st.st_size)) {
|
|
error("'%s': short read %s", filename, strerror(errno));
|
|
close(i);
|
|
free(data);
|
|
return 0;
|
|
}
|
|
close(i);
|
|
if (opt->relative && opt->prefix_length)
|
|
filename += opt->prefix_length;
|
|
i = grep_buffer(opt, filename, data, st.st_size);
|
|
free(data);
|
|
return i;
|
|
}
|
|
|
|
static int exec_grep(int argc, const char **argv)
|
|
{
|
|
pid_t pid;
|
|
int status;
|
|
|
|
argv[argc] = NULL;
|
|
pid = fork();
|
|
if (pid < 0)
|
|
return pid;
|
|
if (!pid) {
|
|
execvp("grep", (char **) argv);
|
|
exit(255);
|
|
}
|
|
while (waitpid(pid, &status, 0) < 0) {
|
|
if (errno == EINTR)
|
|
continue;
|
|
return -1;
|
|
}
|
|
if (WIFEXITED(status)) {
|
|
if (!WEXITSTATUS(status))
|
|
return 1;
|
|
return 0;
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
#define MAXARGS 1000
|
|
#define ARGBUF 4096
|
|
#define push_arg(a) do { \
|
|
if (nr < MAXARGS) argv[nr++] = (a); \
|
|
else die("maximum number of args exceeded"); \
|
|
} while (0)
|
|
|
|
static int external_grep(struct grep_opt *opt, const char **paths, int cached)
|
|
{
|
|
int i, nr, argc, hit, len, status;
|
|
const char *argv[MAXARGS+1];
|
|
char randarg[ARGBUF];
|
|
char *argptr = randarg;
|
|
struct grep_pat *p;
|
|
|
|
if (opt->extended || (opt->relative && opt->prefix_length))
|
|
return -1;
|
|
len = nr = 0;
|
|
push_arg("grep");
|
|
if (opt->fixed)
|
|
push_arg("-F");
|
|
if (opt->linenum)
|
|
push_arg("-n");
|
|
if (opt->regflags & REG_EXTENDED)
|
|
push_arg("-E");
|
|
if (opt->regflags & REG_ICASE)
|
|
push_arg("-i");
|
|
if (opt->word_regexp)
|
|
push_arg("-w");
|
|
if (opt->name_only)
|
|
push_arg("-l");
|
|
if (opt->unmatch_name_only)
|
|
push_arg("-L");
|
|
if (opt->count)
|
|
push_arg("-c");
|
|
if (opt->post_context || opt->pre_context) {
|
|
if (opt->post_context != opt->pre_context) {
|
|
if (opt->pre_context) {
|
|
push_arg("-B");
|
|
len += snprintf(argptr, sizeof(randarg)-len,
|
|
"%u", opt->pre_context);
|
|
if (sizeof(randarg) <= len)
|
|
die("maximum length of args exceeded");
|
|
push_arg(argptr);
|
|
argptr += len;
|
|
}
|
|
if (opt->post_context) {
|
|
push_arg("-A");
|
|
len += snprintf(argptr, sizeof(randarg)-len,
|
|
"%u", opt->post_context);
|
|
if (sizeof(randarg) <= len)
|
|
die("maximum length of args exceeded");
|
|
push_arg(argptr);
|
|
argptr += len;
|
|
}
|
|
}
|
|
else {
|
|
push_arg("-C");
|
|
len += snprintf(argptr, sizeof(randarg)-len,
|
|
"%u", opt->post_context);
|
|
if (sizeof(randarg) <= len)
|
|
die("maximum length of args exceeded");
|
|
push_arg(argptr);
|
|
argptr += len;
|
|
}
|
|
}
|
|
for (p = opt->pattern_list; p; p = p->next) {
|
|
push_arg("-e");
|
|
push_arg(p->pattern);
|
|
}
|
|
|
|
/*
|
|
* To make sure we get the header printed out when we want it,
|
|
* add /dev/null to the paths to grep. This is unnecessary
|
|
* (and wrong) with "-l" or "-L", which always print out the
|
|
* name anyway.
|
|
*
|
|
* GNU grep has "-H", but this is portable.
|
|
*/
|
|
if (!opt->name_only && !opt->unmatch_name_only)
|
|
push_arg("/dev/null");
|
|
|
|
hit = 0;
|
|
argc = nr;
|
|
for (i = 0; i < active_nr; i++) {
|
|
struct cache_entry *ce = active_cache[i];
|
|
char *name;
|
|
if (ce_stage(ce) || !S_ISREG(ntohl(ce->ce_mode)))
|
|
continue;
|
|
if (!pathspec_matches(paths, ce->name))
|
|
continue;
|
|
name = ce->name;
|
|
if (name[0] == '-') {
|
|
int len = ce_namelen(ce);
|
|
name = xmalloc(len + 3);
|
|
memcpy(name, "./", 2);
|
|
memcpy(name + 2, ce->name, len + 1);
|
|
}
|
|
argv[argc++] = name;
|
|
if (argc < MAXARGS)
|
|
continue;
|
|
status = exec_grep(argc, argv);
|
|
if (0 < status)
|
|
hit = 1;
|
|
argc = nr;
|
|
}
|
|
if (argc > nr) {
|
|
status = exec_grep(argc, argv);
|
|
if (0 < status)
|
|
hit = 1;
|
|
}
|
|
return hit;
|
|
}
|
|
|
|
static int grep_cache(struct grep_opt *opt, const char **paths, int cached)
|
|
{
|
|
int hit = 0;
|
|
int nr;
|
|
read_cache();
|
|
|
|
#ifdef __unix__
|
|
/*
|
|
* Use the external "grep" command for the case where
|
|
* we grep through the checked-out files. It tends to
|
|
* be a lot more optimized
|
|
*/
|
|
if (!cached) {
|
|
hit = external_grep(opt, paths, cached);
|
|
if (hit >= 0)
|
|
return hit;
|
|
}
|
|
#endif
|
|
|
|
for (nr = 0; nr < active_nr; nr++) {
|
|
struct cache_entry *ce = active_cache[nr];
|
|
if (ce_stage(ce) || !S_ISREG(ntohl(ce->ce_mode)))
|
|
continue;
|
|
if (!pathspec_matches(paths, ce->name))
|
|
continue;
|
|
if (cached)
|
|
hit |= grep_sha1(opt, ce->sha1, ce->name, 0);
|
|
else
|
|
hit |= grep_file(opt, ce->name);
|
|
}
|
|
return hit;
|
|
}
|
|
|
|
static int grep_tree(struct grep_opt *opt, const char **paths,
|
|
struct tree_desc *tree,
|
|
const char *tree_name, const char *base)
|
|
{
|
|
int len;
|
|
int hit = 0;
|
|
struct name_entry entry;
|
|
char *down;
|
|
int tn_len = strlen(tree_name);
|
|
char *path_buf = xmalloc(PATH_MAX + tn_len + 100);
|
|
|
|
if (tn_len) {
|
|
tn_len = sprintf(path_buf, "%s:", tree_name);
|
|
down = path_buf + tn_len;
|
|
strcat(down, base);
|
|
}
|
|
else {
|
|
down = path_buf;
|
|
strcpy(down, base);
|
|
}
|
|
len = strlen(path_buf);
|
|
|
|
while (tree_entry(tree, &entry)) {
|
|
strcpy(path_buf + len, entry.path);
|
|
|
|
if (S_ISDIR(entry.mode))
|
|
/* Match "abc/" against pathspec to
|
|
* decide if we want to descend into "abc"
|
|
* directory.
|
|
*/
|
|
strcpy(path_buf + len + entry.pathlen, "/");
|
|
|
|
if (!pathspec_matches(paths, down))
|
|
;
|
|
else if (S_ISREG(entry.mode))
|
|
hit |= grep_sha1(opt, entry.sha1, path_buf, tn_len);
|
|
else if (S_ISDIR(entry.mode)) {
|
|
char type[20];
|
|
struct tree_desc sub;
|
|
void *data;
|
|
data = read_sha1_file(entry.sha1, type, &sub.size);
|
|
if (!data)
|
|
die("unable to read tree (%s)",
|
|
sha1_to_hex(entry.sha1));
|
|
sub.buf = data;
|
|
hit |= grep_tree(opt, paths, &sub, tree_name, down);
|
|
free(data);
|
|
}
|
|
}
|
|
return hit;
|
|
}
|
|
|
|
static int grep_object(struct grep_opt *opt, const char **paths,
|
|
struct object *obj, const char *name)
|
|
{
|
|
if (obj->type == OBJ_BLOB)
|
|
return grep_sha1(opt, obj->sha1, name, 0);
|
|
if (obj->type == OBJ_COMMIT || obj->type == OBJ_TREE) {
|
|
struct tree_desc tree;
|
|
void *data;
|
|
int hit;
|
|
data = read_object_with_reference(obj->sha1, tree_type,
|
|
&tree.size, NULL);
|
|
if (!data)
|
|
die("unable to read tree (%s)", sha1_to_hex(obj->sha1));
|
|
tree.buf = data;
|
|
hit = grep_tree(opt, paths, &tree, name, "");
|
|
free(data);
|
|
return hit;
|
|
}
|
|
die("unable to grep from object of type %s", typename(obj->type));
|
|
}
|
|
|
|
static const char builtin_grep_usage[] =
|
|
"git-grep <option>* <rev>* [-e] <pattern> [<path>...]";
|
|
|
|
static const char emsg_invalid_context_len[] =
|
|
"%s: invalid context length argument";
|
|
static const char emsg_missing_context_len[] =
|
|
"missing context length argument";
|
|
static const char emsg_missing_argument[] =
|
|
"option requires an argument -%s";
|
|
|
|
int cmd_grep(int argc, const char **argv, const char *prefix)
|
|
{
|
|
int hit = 0;
|
|
int cached = 0;
|
|
int seen_dashdash = 0;
|
|
struct grep_opt opt;
|
|
struct object_array list = { 0, 0, NULL };
|
|
const char **paths = NULL;
|
|
int i;
|
|
|
|
memset(&opt, 0, sizeof(opt));
|
|
opt.prefix_length = (prefix && *prefix) ? strlen(prefix) : 0;
|
|
opt.relative = 1;
|
|
opt.pattern_tail = &opt.pattern_list;
|
|
opt.regflags = REG_NEWLINE;
|
|
|
|
/*
|
|
* If there is no -- then the paths must exist in the working
|
|
* tree. If there is no explicit pattern specified with -e or
|
|
* -f, we take the first unrecognized non option to be the
|
|
* pattern, but then what follows it must be zero or more
|
|
* valid refs up to the -- (if exists), and then existing
|
|
* paths. If there is an explicit pattern, then the first
|
|
* unrecognized non option is the beginning of the refs list
|
|
* that continues up to the -- (if exists), and then paths.
|
|
*/
|
|
|
|
while (1 < argc) {
|
|
const char *arg = argv[1];
|
|
argc--; argv++;
|
|
if (!strcmp("--cached", arg)) {
|
|
cached = 1;
|
|
continue;
|
|
}
|
|
if (!strcmp("-a", arg) ||
|
|
!strcmp("--text", arg)) {
|
|
opt.binary = GREP_BINARY_TEXT;
|
|
continue;
|
|
}
|
|
if (!strcmp("-i", arg) ||
|
|
!strcmp("--ignore-case", arg)) {
|
|
opt.regflags |= REG_ICASE;
|
|
continue;
|
|
}
|
|
if (!strcmp("-I", arg)) {
|
|
opt.binary = GREP_BINARY_NOMATCH;
|
|
continue;
|
|
}
|
|
if (!strcmp("-v", arg) ||
|
|
!strcmp("--invert-match", arg)) {
|
|
opt.invert = 1;
|
|
continue;
|
|
}
|
|
if (!strcmp("-E", arg) ||
|
|
!strcmp("--extended-regexp", arg)) {
|
|
opt.regflags |= REG_EXTENDED;
|
|
continue;
|
|
}
|
|
if (!strcmp("-F", arg) ||
|
|
!strcmp("--fixed-strings", arg)) {
|
|
opt.fixed = 1;
|
|
continue;
|
|
}
|
|
if (!strcmp("-G", arg) ||
|
|
!strcmp("--basic-regexp", arg)) {
|
|
opt.regflags &= ~REG_EXTENDED;
|
|
continue;
|
|
}
|
|
if (!strcmp("-n", arg)) {
|
|
opt.linenum = 1;
|
|
continue;
|
|
}
|
|
if (!strcmp("-H", arg)) {
|
|
/* We always show the pathname, so this
|
|
* is a noop.
|
|
*/
|
|
continue;
|
|
}
|
|
if (!strcmp("-l", arg) ||
|
|
!strcmp("--files-with-matches", arg)) {
|
|
opt.name_only = 1;
|
|
continue;
|
|
}
|
|
if (!strcmp("-L", arg) ||
|
|
!strcmp("--files-without-match", arg)) {
|
|
opt.unmatch_name_only = 1;
|
|
continue;
|
|
}
|
|
if (!strcmp("-c", arg) ||
|
|
!strcmp("--count", arg)) {
|
|
opt.count = 1;
|
|
continue;
|
|
}
|
|
if (!strcmp("-w", arg) ||
|
|
!strcmp("--word-regexp", arg)) {
|
|
opt.word_regexp = 1;
|
|
continue;
|
|
}
|
|
if (!strncmp("-A", arg, 2) ||
|
|
!strncmp("-B", arg, 2) ||
|
|
!strncmp("-C", arg, 2) ||
|
|
(arg[0] == '-' && '1' <= arg[1] && arg[1] <= '9')) {
|
|
unsigned num;
|
|
const char *scan;
|
|
switch (arg[1]) {
|
|
case 'A': case 'B': case 'C':
|
|
if (!arg[2]) {
|
|
if (argc <= 1)
|
|
die(emsg_missing_context_len);
|
|
scan = *++argv;
|
|
argc--;
|
|
}
|
|
else
|
|
scan = arg + 2;
|
|
break;
|
|
default:
|
|
scan = arg + 1;
|
|
break;
|
|
}
|
|
if (sscanf(scan, "%u", &num) != 1)
|
|
die(emsg_invalid_context_len, scan);
|
|
switch (arg[1]) {
|
|
case 'A':
|
|
opt.post_context = num;
|
|
break;
|
|
default:
|
|
case 'C':
|
|
opt.post_context = num;
|
|
case 'B':
|
|
opt.pre_context = num;
|
|
break;
|
|
}
|
|
continue;
|
|
}
|
|
if (!strcmp("-f", arg)) {
|
|
FILE *patterns;
|
|
int lno = 0;
|
|
char buf[1024];
|
|
if (argc <= 1)
|
|
die(emsg_missing_argument, arg);
|
|
patterns = fopen(argv[1], "r");
|
|
if (!patterns)
|
|
die("'%s': %s", argv[1], strerror(errno));
|
|
while (fgets(buf, sizeof(buf), patterns)) {
|
|
int len = strlen(buf);
|
|
if (buf[len-1] == '\n')
|
|
buf[len-1] = 0;
|
|
/* ignore empty line like grep does */
|
|
if (!buf[0])
|
|
continue;
|
|
add_pattern(&opt, xstrdup(buf), argv[1], ++lno,
|
|
GREP_PATTERN);
|
|
}
|
|
fclose(patterns);
|
|
argv++;
|
|
argc--;
|
|
continue;
|
|
}
|
|
if (!strcmp("--not", arg)) {
|
|
add_pattern(&opt, arg, "command line", 0, GREP_NOT);
|
|
continue;
|
|
}
|
|
if (!strcmp("--and", arg)) {
|
|
add_pattern(&opt, arg, "command line", 0, GREP_AND);
|
|
continue;
|
|
}
|
|
if (!strcmp("--or", arg))
|
|
continue; /* no-op */
|
|
if (!strcmp("(", arg)) {
|
|
add_pattern(&opt, arg, "command line", 0, GREP_OPEN_PAREN);
|
|
continue;
|
|
}
|
|
if (!strcmp(")", arg)) {
|
|
add_pattern(&opt, arg, "command line", 0, GREP_CLOSE_PAREN);
|
|
continue;
|
|
}
|
|
if (!strcmp("-e", arg)) {
|
|
if (1 < argc) {
|
|
add_pattern(&opt, argv[1], "-e option", 0,
|
|
GREP_PATTERN);
|
|
argv++;
|
|
argc--;
|
|
continue;
|
|
}
|
|
die(emsg_missing_argument, arg);
|
|
}
|
|
if (!strcmp("--full-name", arg)) {
|
|
opt.relative = 0;
|
|
continue;
|
|
}
|
|
if (!strcmp("--", arg)) {
|
|
/* later processing wants to have this at argv[1] */
|
|
argv--;
|
|
argc++;
|
|
break;
|
|
}
|
|
if (*arg == '-')
|
|
usage(builtin_grep_usage);
|
|
|
|
/* First unrecognized non-option token */
|
|
if (!opt.pattern_list) {
|
|
add_pattern(&opt, arg, "command line", 0,
|
|
GREP_PATTERN);
|
|
break;
|
|
}
|
|
else {
|
|
/* We are looking at the first path or rev;
|
|
* it is found at argv[1] after leaving the
|
|
* loop.
|
|
*/
|
|
argc++; argv--;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!opt.pattern_list)
|
|
die("no pattern given.");
|
|
if ((opt.regflags != REG_NEWLINE) && opt.fixed)
|
|
die("cannot mix --fixed-strings and regexp");
|
|
if (!opt.fixed)
|
|
compile_patterns(&opt);
|
|
|
|
/* Check revs and then paths */
|
|
for (i = 1; i < argc; i++) {
|
|
const char *arg = argv[i];
|
|
unsigned char sha1[20];
|
|
/* Is it a rev? */
|
|
if (!get_sha1(arg, sha1)) {
|
|
struct object *object = parse_object(sha1);
|
|
if (!object)
|
|
die("bad object %s", arg);
|
|
add_object_array(object, arg, &list);
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "--")) {
|
|
i++;
|
|
seen_dashdash = 1;
|
|
}
|
|
break;
|
|
}
|
|
|
|
/* The rest are paths */
|
|
if (!seen_dashdash) {
|
|
int j;
|
|
for (j = i; j < argc; j++)
|
|
verify_filename(prefix, argv[j]);
|
|
}
|
|
|
|
if (i < argc) {
|
|
paths = get_pathspec(prefix, argv + i);
|
|
if (opt.prefix_length && opt.relative) {
|
|
/* Make sure we do not get outside of paths */
|
|
for (i = 0; paths[i]; i++)
|
|
if (strncmp(prefix, paths[i], opt.prefix_length))
|
|
die("git-grep: cannot generate relative filenames containing '..'");
|
|
}
|
|
}
|
|
else if (prefix) {
|
|
paths = xcalloc(2, sizeof(const char *));
|
|
paths[0] = prefix;
|
|
paths[1] = NULL;
|
|
}
|
|
|
|
if (!list.nr)
|
|
return !grep_cache(&opt, paths, cached);
|
|
|
|
if (cached)
|
|
die("both --cached and trees are given.");
|
|
|
|
for (i = 0; i < list.nr; i++) {
|
|
struct object *real_obj;
|
|
real_obj = deref_tag(list.objects[i].item, NULL, 0);
|
|
if (grep_object(&opt, paths, real_obj, list.objects[i].name))
|
|
hit = 1;
|
|
}
|
|
return !hit;
|
|
}
|