builtin-help: make some internal functions available to other builtins

diff --git a/builtin-grep.c b/builtin-grep.c
index f4f4ecb11b587c74a009c94cb7b230e7c93590e4..631129ddfd0ffe06f919882d22cfc494d9553f50 100644 (file)
--- a/builtin-grep.c
+++ b/builtin-grep.c
@@ -12,6 +12,14 @@
 #include "builtin.h"
 #include "grep.h"
 
+#ifndef NO_EXTERNAL_GREP
+#ifdef __unix__
+#define NO_EXTERNAL_GREP 0
+#else
+#define NO_EXTERNAL_GREP 1
+#endif
+#endif
+
 /*
  * git grep pathspecs are somewhat different from diff-tree pathspecs;
  * pathname wildcards are allowed.
@@ -153,7 +161,7 @@ static int grep_file(struct grep_opt *opt, const char *filename)
        return i;
 }
 
-#ifdef __unix__
+#if !NO_EXTERNAL_GREP
 static int exec_grep(int argc, const char **argv)
 {
        pid_t pid;
@@ -372,7 +380,7 @@ static int grep_cache(struct grep_opt *opt, const char **paths, int cached)
        int nr;
        read_cache();
 
-#ifdef __unix__
+#if !NO_EXTERNAL_GREP
        /*
         * Use the external "grep" command for the case where
         * we grep through the checked-out files. It tends to
@@ -419,33 +427,35 @@ static int grep_tree(struct grep_opt *opt, const char **paths,
        struct name_entry entry;
        char *down;
        int tn_len = strlen(tree_name);
-       char *path_buf = xmalloc(PATH_MAX + tn_len + 100);
+       struct strbuf pathbuf;
+
+       strbuf_init(&pathbuf, PATH_MAX + tn_len);
 
        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);
+               strbuf_add(&pathbuf, tree_name, tn_len);
+               strbuf_addch(&pathbuf, ':');
+               tn_len = pathbuf.len;
        }
-       len = strlen(path_buf);
+       strbuf_addstr(&pathbuf, base);
+       len = pathbuf.len;
 
        while (tree_entry(tree, &entry)) {
-               strcpy(path_buf + len, entry.path);
+               int te_len = tree_entry_len(entry.path, entry.sha1);
+               pathbuf.len = len;
+               strbuf_add(&pathbuf, entry.path, te_len);
 
                if (S_ISDIR(entry.mode))
                        /* Match "abc/" against pathspec to
                         * decide if we want to descend into "abc"
                         * directory.
                         */
-                       strcpy(path_buf + len + tree_entry_len(entry.path, entry.sha1), "/");
+                       strbuf_addch(&pathbuf, '/');
 
+               down = pathbuf.buf + tn_len;
                if (!pathspec_matches(paths, down))
                        ;
                else if (S_ISREG(entry.mode))
-                       hit |= grep_sha1(opt, entry.sha1, path_buf, tn_len);
+                       hit |= grep_sha1(opt, entry.sha1, pathbuf.buf, tn_len);
                else if (S_ISDIR(entry.mode)) {
                        enum object_type type;
                        struct tree_desc sub;
@@ -461,6 +471,7 @@ static int grep_tree(struct grep_opt *opt, const char **paths,
                        free(data);
                }
        }
+       strbuf_release(&pathbuf);
        return hit;
 }
 
@@ -487,7 +498,7 @@ static int grep_object(struct grep_opt *opt, const char **paths,
 }
 
 static const char builtin_grep_usage[] =
-"git-grep <option>* <rev>* [-e] <pattern> [<path>...]";
+"git grep <option>* [-e] <pattern> <rev>* [[--] <path>...]";
 
 static const char emsg_invalid_context_len[] =
 "%s: invalid context length argument";