git-bisect: modernize branch shuffling hack

diff --git a/builtin-commit-tree.c b/builtin-commit-tree.c
index ccbcbe30dab634d9ff393f1e849c18388b9d53d4..88b0ab36eba6ded8f1a39e0d4c83122b7e026874 100644 (file)
--- a/builtin-commit-tree.c
+++ b/builtin-commit-tree.c
@@ -14,36 +14,6 @@
 /*
  * FIXME! Share the code with "write-tree.c"
  */
-static void init_buffer(char **bufp, unsigned int *sizep)
-{
-       *bufp = xmalloc(BLOCKING);
-       *sizep = 0;
-}
-
-static void add_buffer(char **bufp, unsigned int *sizep, const char *fmt, ...)
-{
-       char one_line[2048];
-       va_list args;
-       int len;
-       unsigned long alloc, size, newsize;
-       char *buf;
-
-       va_start(args, fmt);
-       len = vsnprintf(one_line, sizeof(one_line), fmt, args);
-       va_end(args);
-       size = *sizep;
-       newsize = size + len + 1;
-       alloc = (size + 32767) & ~32767;
-       buf = *bufp;
-       if (newsize > alloc) {
-               alloc = (newsize + 32767) & ~32767;
-               buf = xrealloc(buf, alloc);
-               *bufp = buf;
-       }
-       *sizep = newsize - 1;
-       memcpy(buf + size, one_line, len);
-}
-
 static void check_valid(unsigned char *sha1, enum object_type expect)
 {
        enum object_type type = sha1_object_info(sha1, NULL);
@@ -87,9 +57,7 @@ int cmd_commit_tree(int argc, const char **argv, const char *prefix)
        int parents = 0;
        unsigned char tree_sha1[20];
        unsigned char commit_sha1[20];
-       char comment[1000];
-       char *buffer;
-       unsigned int size;
+       struct strbuf buffer;
        int encoding_is_utf8;
 
        git_config(git_default_config);
@@ -118,8 +86,8 @@ int cmd_commit_tree(int argc, const char **argv, const char *prefix)
        /* Not having i18n.commitencoding is the same as having utf-8 */
        encoding_is_utf8 = is_encoding_utf8(git_commit_encoding);
 
-       init_buffer(&buffer, &size);
-       add_buffer(&buffer, &size, "tree %s\n", sha1_to_hex(tree_sha1));
+       strbuf_init(&buffer, 8192); /* should avoid reallocs for the headers */
+       strbuf_addf(&buffer, "tree %s\n", sha1_to_hex(tree_sha1));
 
        /*
         * NOTE! This ordering means that the same exact tree merged with a
@@ -127,26 +95,24 @@ int cmd_commit_tree(int argc, const char **argv, const char *prefix)
         * if everything else stays the same.
         */
        for (i = 0; i < parents; i++)
-               add_buffer(&buffer, &size, "parent %s\n", sha1_to_hex(parent_sha1[i]));
+               strbuf_addf(&buffer, "parent %s\n", sha1_to_hex(parent_sha1[i]));
 
        /* Person/date information */
-       add_buffer(&buffer, &size, "author %s\n", git_author_info(1));
-       add_buffer(&buffer, &size, "committer %s\n", git_committer_info(1));
+       strbuf_addf(&buffer, "author %s\n", git_author_info(1));
+       strbuf_addf(&buffer, "committer %s\n", git_committer_info(1));
        if (!encoding_is_utf8)
-               add_buffer(&buffer, &size,
-                               "encoding %s\n", git_commit_encoding);
-       add_buffer(&buffer, &size, "\n");
+               strbuf_addf(&buffer, "encoding %s\n", git_commit_encoding);
+       strbuf_addch(&buffer, '\n');
 
        /* And add the comment */
-       while (fgets(comment, sizeof(comment), stdin) != NULL)
-               add_buffer(&buffer, &size, "%s", comment);
+       if (strbuf_read(&buffer, 0, 0) < 0)
+               die("git-commit-tree: read returned %s", strerror(errno));
 
        /* And check the encoding */
-       buffer[size] = '\0';
-       if (encoding_is_utf8 && !is_utf8(buffer))
+       if (encoding_is_utf8 && !is_utf8(buffer.buf))
                fprintf(stderr, commit_utf8_warn);
 
-       if (!write_sha1_file(buffer, size, commit_type, commit_sha1)) {
+       if (!write_sha1_file(buffer.buf, buffer.len, commit_type, commit_sha1)) {
                printf("%s\n", sha1_to_hex(commit_sha1));
                return 0;
        }