grep: recurse in-process using 'struct repository'

diff --git a/grep.c b/grep.c
index 29439886e793b9c54d46ccab99d2c9412edd2039..45acd333b093d8e3bd77f367a19317010372ce99 100644 (file)
--- a/grep.c
+++ b/grep.c
@@ -35,7 +35,6 @@ void init_grep_defaults(void)
        memset(opt, 0, sizeof(*opt));
        opt->relative = 1;
        opt->pathname = 1;
-       opt->regflags = REG_NEWLINE;
        opt->max_depth = -1;
        opt->pattern_type_option = GREP_PATTERN_TYPE_UNSPECIFIED;
        color_set(opt->color_context, "");
@@ -78,10 +77,7 @@ int grep_config(const char *var, const char *value, void *cb)
                return -1;
 
        if (!strcmp(var, "grep.extendedregexp")) {
-               if (git_config_bool(var, value))
-                       opt->extended_regexp_option = 1;
-               else
-                       opt->extended_regexp_option = 0;
+               opt->extended_regexp_option = git_config_bool(var, value);
                return 0;
        }
 
@@ -156,7 +152,6 @@ void grep_init(struct grep_opt *opt, const char *prefix)
        opt->linenum = def->linenum;
        opt->max_depth = def->max_depth;
        opt->pathname = def->pathname;
-       opt->regflags = def->regflags;
        opt->relative = def->relative;
        opt->output = def->output;
 
@@ -172,33 +167,41 @@ void grep_init(struct grep_opt *opt, const char *prefix)
 
 static void grep_set_pattern_type_option(enum grep_pattern_type pattern_type, struct grep_opt *opt)
 {
+       /*
+        * When committing to the pattern type by setting the relevant
+        * fields in grep_opt it's generally not necessary to zero out
+        * the fields we're not choosing, since they won't have been
+        * set by anything. The extended_regexp_option field is the
+        * only exception to this.
+        *
+        * This is because in the process of parsing grep.patternType
+        * & grep.extendedRegexp we set opt->pattern_type_option and
+        * opt->extended_regexp_option, respectively. We then
+        * internally use opt->extended_regexp_option to see if we're
+        * compiling an ERE. It must be unset if that's not actually
+        * the case.
+        */
+       if (pattern_type != GREP_PATTERN_TYPE_ERE &&
+           opt->extended_regexp_option)
+               opt->extended_regexp_option = 0;
+
        switch (pattern_type) {
        case GREP_PATTERN_TYPE_UNSPECIFIED:
                /* fall through */
 
        case GREP_PATTERN_TYPE_BRE:
-               opt->fixed = 0;
-               opt->pcre1 = 0;
-               opt->pcre2 = 0;
                break;
 
        case GREP_PATTERN_TYPE_ERE:
-               opt->fixed = 0;
-               opt->pcre1 = 0;
-               opt->pcre2 = 0;
-               opt->regflags |= REG_EXTENDED;
+               opt->extended_regexp_option = 1;
                break;
 
        case GREP_PATTERN_TYPE_FIXED:
                opt->fixed = 1;
-               opt->pcre1 = 0;
-               opt->pcre2 = 0;
                break;
 
        case GREP_PATTERN_TYPE_PCRE:
-               opt->fixed = 0;
 #ifdef USE_LIBPCRE2
-               opt->pcre1 = 0;
                opt->pcre2 = 1;
 #else
                /*
@@ -208,7 +211,6 @@ static void grep_set_pattern_type_option(enum grep_pattern_type pattern_type, st
                 * "cannot use Perl-compatible regexes[...]".
                 */
                opt->pcre1 = 1;
-               opt->pcre2 = 0;
 #endif
                break;
        }
@@ -221,6 +223,11 @@ void grep_commit_pattern_type(enum grep_pattern_type pattern_type, struct grep_o
        else if (opt->pattern_type_option != GREP_PATTERN_TYPE_UNSPECIFIED)
                grep_set_pattern_type_option(opt->pattern_type_option, opt);
        else if (opt->extended_regexp_option)
+               /*
+                * This branch *must* happen after setting from the
+                * opt->pattern_type_option above, we don't want
+                * grep.extendedRegexp to override grep.patternType!
+                */
                grep_set_pattern_type_option(GREP_PATTERN_TYPE_ERE, opt);
 }
 
@@ -586,7 +593,7 @@ static void compile_fixed_regexp(struct grep_pat *p, struct grep_opt *opt)
 {
        struct strbuf sb = STRBUF_INIT;
        int err;
-       int regflags = opt->regflags;
+       int regflags = 0;
 
        basic_regex_quote_buf(&sb, p->pattern);
        if (opt->ignore_case)
@@ -605,12 +612,12 @@ static void compile_fixed_regexp(struct grep_pat *p, struct grep_opt *opt)
 
 static void compile_regexp(struct grep_pat *p, struct grep_opt *opt)
 {
-       int icase, ascii_only;
+       int ascii_only;
        int err;
+       int regflags = REG_NEWLINE;
 
        p->word_regexp = opt->word_regexp;
        p->ignore_case = opt->ignore_case;
-       icase          = opt->regflags & REG_ICASE || p->ignore_case;
        ascii_only     = !has_non_ascii(p->pattern);
 
        /*
@@ -628,12 +635,10 @@ static void compile_regexp(struct grep_pat *p, struct grep_opt *opt)
        if (opt->fixed ||
            has_null(p->pattern, p->patternlen) ||
            is_fixed(p->pattern, p->patternlen))
-               p->fixed = !icase || ascii_only;
-       else
-               p->fixed = 0;
+               p->fixed = !p->ignore_case || ascii_only;
 
        if (p->fixed) {
-               p->kws = kwsalloc(icase ? tolower_trans_tbl : NULL);
+               p->kws = kwsalloc(p->ignore_case ? tolower_trans_tbl : NULL);
                kwsincr(p->kws, p->pattern, p->patternlen);
                kwsprep(p->kws);
                return;
@@ -657,7 +662,11 @@ static void compile_regexp(struct grep_pat *p, struct grep_opt *opt)
                return;
        }
 
-       err = regcomp(&p->regexp, p->pattern, opt->regflags);
+       if (p->ignore_case)
+               regflags |= REG_ICASE;
+       if (opt->extended_regexp_option)
+               regflags |= REG_EXTENDED;
+       err = regcomp(&p->regexp, p->pattern, regflags);
        if (err) {
                char errbuf[1024];
                regerror(err, &p->regexp, errbuf, 1024);
@@ -1918,16 +1927,6 @@ void grep_source_init(struct grep_source *gs, enum grep_source_type type,
        case GREP_SOURCE_FILE:
                gs->identifier = xstrdup(identifier);
                break;
-       case GREP_SOURCE_SUBMODULE:
-               if (!identifier) {
-                       gs->identifier = NULL;
-                       break;
-               }
-               /*
-                * FALL THROUGH
-                * If the identifier is non-NULL (in the submodule case) it
-                * will be a SHA1 that needs to be copied.
-                */
        case GREP_SOURCE_OID:
                gs->identifier = oiddup(identifier);
                break;
@@ -1950,7 +1949,6 @@ void grep_source_clear_data(struct grep_source *gs)
        switch (gs->type) {
        case GREP_SOURCE_FILE:
        case GREP_SOURCE_OID:
-       case GREP_SOURCE_SUBMODULE:
                FREE_AND_NULL(gs->buf);
                gs->size = 0;
                break;
@@ -2021,8 +2019,6 @@ static int grep_source_load(struct grep_source *gs)
                return grep_source_load_oid(gs);
        case GREP_SOURCE_BUF:
                return gs->buf ? 0 : -1;
-       case GREP_SOURCE_SUBMODULE:
-               break;
        }
        die("BUG: invalid grep_source type to load");
 }