зеркало из https://github.com/microsoft/git.git
builtin-grep: do not use setup_revisions()
Grep may want to grok multiple revisions, but it does not make much sense to walk revisions while doing so. This stops calling the code to parse parameters for the revision walker. The parameter parsing for the optional "-e" option becomes a lot simpler with it as well. Signed-off-by: Junio C Hamano <junkio@cox.net>
This commit is contained in:
Junio C Hamano
Родитель
df0e7aa864
Коммит
1362671f6a
265
builtin-grep.c
265
builtin-grep.c
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@ -8,8 +8,7 @@
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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 "diff.h"
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#include "revision.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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@ -18,15 +17,15 @@
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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(struct diff_options *opt, const char *name)
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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 (!opt->nr_paths)
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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; i < opt->nr_paths; i++) {
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const char *match = opt->paths[i];
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int matchlen = opt->pathlens[i];
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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 *slash, *cp;
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if ((matchlen <= namelen) &&
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@ -241,7 +240,7 @@ static int grep_file(struct grep_opt *opt, const char *filename)
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return i;
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}
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static int grep_cache(struct grep_opt *opt, struct rev_info *revs, int cached)
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static int grep_cache(struct grep_opt *opt, const char **paths, int cached)
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{
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int hit = 0;
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int nr;
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@ -251,7 +250,7 @@ static int grep_cache(struct grep_opt *opt, struct rev_info *revs, int cached)
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struct cache_entry *ce = active_cache[nr];
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if (ce_stage(ce) || !S_ISREG(ntohl(ce->ce_mode)))
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continue;
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if (!pathspec_matches(&revs->diffopt, ce->name))
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if (!pathspec_matches(paths, ce->name))
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continue;
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if (cached)
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hit |= grep_sha1(opt, ce->sha1, ce->name);
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@ -261,7 +260,7 @@ static int grep_cache(struct grep_opt *opt, struct rev_info *revs, int cached)
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return hit;
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}
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static int grep_tree(struct grep_opt *opt, struct rev_info *revs,
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static int grep_tree(struct grep_opt *opt, const char **paths,
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struct tree_desc *tree,
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const char *tree_name, const char *base)
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{
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@ -297,7 +296,7 @@ static int grep_tree(struct grep_opt *opt, struct rev_info *revs,
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*/
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strcpy(path_buf + len + pathlen, "/");
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if (!pathspec_matches(&revs->diffopt, down))
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if (!pathspec_matches(paths, down))
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;
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else if (S_ISREG(mode))
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hit |= grep_sha1(opt, sha1, path_buf);
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@ -310,7 +309,7 @@ static int grep_tree(struct grep_opt *opt, struct rev_info *revs,
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die("unable to read tree (%s)",
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sha1_to_hex(sha1));
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sub.buf = data;
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hit |= grep_tree(opt, revs, &sub, tree_name, down);
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hit |= grep_tree(opt, paths, &sub, tree_name, down);
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free(data);
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}
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update_tree_entry(tree);
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@ -318,7 +317,7 @@ static int grep_tree(struct grep_opt *opt, struct rev_info *revs,
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return hit;
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}
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static int grep_object(struct grep_opt *opt, struct rev_info *revs,
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static int grep_object(struct grep_opt *opt, const char **paths,
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struct object *obj, const char *name)
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{
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if (!strcmp(obj->type, blob_type))
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@ -333,7 +332,7 @@ static int grep_object(struct grep_opt *opt, struct rev_info *revs,
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if (!data)
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die("unable to read tree (%s)", sha1_to_hex(obj->sha1));
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tree.buf = data;
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hit = grep_tree(opt, revs, &tree, name, "");
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hit = grep_tree(opt, paths, &tree, name, "");
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free(data);
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return hit;
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}
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@ -345,102 +344,119 @@ static const char builtin_grep_usage[] =
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int cmd_grep(int argc, const char **argv, char **envp)
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{
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struct rev_info rev;
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const char **dst, **src;
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int err;
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int hit = 0;
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int no_more_arg = 0;
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int seen_range = 0;
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int no_more_flags = 0;
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int seen_noncommit = 0;
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int cached = 0;
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struct grep_opt opt;
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struct object_list *list;
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struct object_list *list, **tail, *object_list = NULL;
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const char *prefix = setup_git_directory();
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const char **paths = NULL;
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memset(&opt, 0, sizeof(opt));
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opt.regflags = REG_NEWLINE;
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/*
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* Interpret and remove the grep options upfront. Sigh...
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* No point using rev_info, really.
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*/
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for (dst = src = &argv[1]; src < argc + argv; ) {
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const char *arg = *src++;
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if (!no_more_arg) {
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if (!strcmp("--", arg)) {
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no_more_arg = 1;
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*dst++ = arg;
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continue;
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}
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if (!strcmp("--cached", arg)) {
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cached = 1;
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continue;
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}
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if (!strcmp("-i", arg) ||
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!strcmp("--ignore-case", arg)) {
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opt.regflags |= REG_ICASE;
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continue;
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}
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if (!strcmp("-v", arg) ||
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!strcmp("--invert-match", arg)) {
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opt.invert = 1;
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continue;
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}
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if (!strcmp("-E", arg) ||
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!strcmp("--extended-regexp", arg)) {
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opt.regflags |= REG_EXTENDED;
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continue;
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}
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if (!strcmp("-G", arg) ||
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!strcmp("--basic-regexp", arg)) {
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opt.regflags &= ~REG_EXTENDED;
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continue;
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}
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if (!strcmp("-e", arg)) {
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if (src < argc + argv) {
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opt.pattern = *src++;
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continue;
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}
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usage(builtin_grep_usage);
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}
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if (!strcmp("-n", arg)) {
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opt.linenum = 1;
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continue;
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}
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if (!strcmp("-H", arg)) {
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/* We always show the pathname, so this
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* is a noop.
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*/
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continue;
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}
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if (!strcmp("-l", arg) ||
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!strcmp("--files-with-matches", arg)) {
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opt.name_only = 1;
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continue;
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}
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if (!strcmp("-A", arg) ||
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!strcmp("-B", arg) ||
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!strcmp("-C", arg)) {
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unsigned num;
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if ((argc + argv <= src) ||
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sscanf(*src++, "%u", &num) != 1)
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usage(builtin_grep_usage);
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switch (arg[1]) {
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case 'A':
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opt.post_context = num;
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break;
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case 'C':
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opt.post_context = num;
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case 'B':
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opt.pre_context = num;
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break;
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}
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continue;
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}
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while (1 < argc) {
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const char *arg = argv[1];
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argc--; argv++;
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if (!strcmp("--cached", arg)) {
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cached = 1;
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continue;
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}
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if (!strcmp("-i", arg) ||
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!strcmp("--ignore-case", arg)) {
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opt.regflags |= REG_ICASE;
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continue;
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}
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if (!strcmp("-v", arg) ||
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!strcmp("--invert-match", arg)) {
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opt.invert = 1;
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continue;
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}
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if (!strcmp("-E", arg) ||
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!strcmp("--extended-regexp", arg)) {
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opt.regflags |= REG_EXTENDED;
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continue;
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}
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if (!strcmp("-G", arg) ||
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!strcmp("--basic-regexp", arg)) {
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opt.regflags &= ~REG_EXTENDED;
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continue;
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}
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if (!strcmp("-n", arg)) {
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opt.linenum = 1;
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continue;
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}
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if (!strcmp("-H", arg)) {
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/* We always show the pathname, so this
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* is a noop.
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*/
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continue;
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}
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if (!strcmp("-l", arg) ||
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!strcmp("--files-with-matches", arg)) {
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opt.name_only = 1;
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continue;
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}
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if (!strcmp("-A", arg) ||
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!strcmp("-B", arg) ||
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!strcmp("-C", arg)) {
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unsigned num;
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if (argc <= 1 ||
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sscanf(*++argv, "%u", &num) != 1)
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usage(builtin_grep_usage);
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argc--;
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switch (arg[1]) {
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case 'A':
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opt.post_context = num;
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break;
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case 'C':
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opt.post_context = num;
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case 'B':
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opt.pre_context = num;
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break;
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}
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continue;
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}
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if (!strcmp("-e", arg)) {
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if (1 < argc) {
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/* We probably would want to do
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* -e pat1 -e pat2 as well later...
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*/
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if (opt.pattern)
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die("more than one pattern?");
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opt.pattern = *++argv;
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argc--;
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continue;
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}
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usage(builtin_grep_usage);
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}
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if (!strcmp("--", arg)) {
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no_more_flags = 1;
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continue;
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}
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/* Either unrecognized option or a single pattern */
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if (!no_more_flags && *arg == '-')
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usage(builtin_grep_usage);
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if (!opt.pattern) {
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opt.pattern = arg;
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break;
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}
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else {
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/* We are looking at the first path or rev;
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* it is found at argv[0] after leaving the
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* loop.
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*/
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argc++; argv--;
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break;
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}
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*dst++ = arg;
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}
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if (!opt.pattern)
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die("no pattern given.");
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err = regcomp(&opt.regexp, opt.pattern, opt.regflags);
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if (err) {
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char errbuf[1024];
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@ -448,11 +464,32 @@ int cmd_grep(int argc, const char **argv, char **envp)
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regfree(&opt.regexp);
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die("'%s': %s", opt.pattern, errbuf);
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}
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tail = &object_list;
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while (1 < argc) {
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struct object *object;
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struct object_list *elem;
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const char *arg = argv[1];
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unsigned char sha1[20];
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if (get_sha1(arg, sha1) < 0)
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break;
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object = parse_object(sha1);
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if (!object)
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die("bad object %s", arg);
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elem = object_list_insert(object, tail);
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elem->name = arg;
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tail = &elem->next;
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argc--; argv++;
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}
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if (1 < argc)
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paths = get_pathspec(prefix, argv + 1);
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else if (prefix) {
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paths = xcalloc(2, sizeof(const char *));
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paths[0] = prefix;
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paths[1] = NULL;
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}
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init_revisions(&rev);
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*dst = NULL;
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argc = setup_revisions(dst - argv, argv, &rev, NULL);
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if (!object_list)
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return !grep_cache(&opt, paths, cached);
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/*
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* Do not walk "grep -e foo master next pu -- Documentation/"
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* but do walk "grep -e foo master..next -- Documentation/".
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@ -460,43 +497,19 @@ int cmd_grep(int argc, const char **argv, char **envp)
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* "grep -e foo v1.0.0:Documentation/ master..next"
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* so detect that and complain.
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*/
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for (list = rev.pending_objects; list; list = list->next) {
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for (list = object_list; list; list = list->next) {
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struct object *real_obj;
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if (list->item->flags & UNINTERESTING)
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seen_range = 1;
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real_obj = deref_tag(list->item, NULL, 0);
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if (strcmp(real_obj->type, commit_type))
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seen_noncommit = 1;
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}
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if (!rev.pending_objects)
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return !grep_cache(&opt, &rev, cached);
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if (cached)
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die("both --cached and revisions given.");
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if (seen_range && seen_noncommit)
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die("both A..B and non commit are given.");
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if (seen_range) {
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struct commit *commit;
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prepare_revision_walk(&rev);
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while ((commit = get_revision(&rev)) != NULL) {
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unsigned char *sha1 = commit->object.sha1;
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const char *n = find_unique_abbrev(sha1, rev.abbrev);
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char rev_name[41];
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strcpy(rev_name, n);
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if (grep_object(&opt, &rev, &commit->object, rev_name))
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hit = 1;
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commit->buffer = NULL;
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}
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return !hit;
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}
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/* all of them are non-commit; do not walk, and
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* do not lose their names.
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*/
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for (list = rev.pending_objects; list; list = list->next) {
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for (list = object_list; list; list = list->next) {
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struct object *real_obj;
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real_obj = deref_tag(list->item, NULL, 0);
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if (grep_object(&opt, &rev, real_obj, list->name))
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if (grep_object(&opt, paths, real_obj, list->name))
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hit = 1;
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}
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return !hit;
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