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determine_author_info(): reuse parsing functions

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Rather than parsing the header manually to find the "author"
field, and then parsing its sub-parts, let's use
find_commit_header and split_ident_line. This is shorter and
easier to read, and should do a more careful parsing job.

For example, the current parser could find the end-of-email
right-bracket across a newline (for a malformed commit), and
calculate a bogus gigantic length for the date (by using
"eol - rb").

As a bonus, this also plugs a memory leak when we pull the
date field from an existing commit (we still leak the name
and email buffers, which will be fixed in a later commit).

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Jeff King 2014-08-27 03:57:28 -04:00 committed by Junio C Hamano
parent c33ddc2e33
commit f0f9662ae9
1 changed files with 20 additions and 27 deletions
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47
builtin/commit.c
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@ -546,42 +546,35 @@ static void determine_author_info(struct strbuf *author_ident)
date = getenv("GIT_AUTHOR_DATE");
if (author_message) {
const char *a, *lb, *rb, *eol;
struct ident_split ident;
size_t len;
const char *a;
a = strstr(author_message_buffer, "\nauthor ");
a = find_commit_header(author_message_buffer, "author", &len);
if (!a)
die(_("invalid commit: %s"), author_message);
die(_("commit '%s' lacks author header"), author_message);
if (split_ident_line(&ident, a, len) < 0)
die(_("commit '%s' has malformed author line"), author_message);
lb = strchrnul(a + strlen("\nauthor "), '<');
rb = strchrnul(lb, '>');
eol = strchrnul(rb, '\n');
if (!*lb || !*rb || !*eol)
die(_("invalid commit: %s"), author_message);
if (lb == a + strlen("\nauthor "))
/* \nauthor <foo@example.com> */
name = xcalloc(1, 1);
else
name = xmemdupz(a + strlen("\nauthor "),
(lb - strlen(" ") -
(a + strlen("\nauthor "))));
email = xmemdupz(lb + strlen("<"), rb - (lb + strlen("<")));
len = eol - (rb + strlen("> "));
date = xmalloc(len + 2);
*date = '@';
memcpy(date + 1, rb + strlen("> "), len);
date[len + 1] = '\0';
name = xmemdupz(ident.name_begin, ident.name_end - ident.name_begin);
email = xmemdupz(ident.mail_begin, ident.mail_end - ident.mail_begin);
if (ident.date_begin) {
strbuf_reset(&date_buf);
strbuf_addch(&date_buf, '@');
strbuf_add(&date_buf, ident.date_begin, ident.date_end - ident.date_begin);
strbuf_addch(&date_buf, ' ');
strbuf_add(&date_buf, ident.tz_begin, ident.tz_end - ident.tz_begin);
date = date_buf.buf;
}
}
if (force_author) {
const char *lb = strstr(force_author, " <");
const char *rb = strchr(force_author, '>');
struct ident_split ident;
if (!lb || !rb)
if (split_ident_line(&ident, force_author, strlen(force_author)) < 0)
die(_("malformed --author parameter"));
name = xstrndup(force_author, lb - force_author);
email = xstrndup(lb + 2, rb - (lb + 2));
name = xmemdupz(ident.name_begin, ident.name_end - ident.name_begin);
email = xmemdupz(ident.mail_begin, ident.mail_end - ident.mail_begin);
}
if (force_date) {