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bundle: add parse_bundle_header() helper function

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Move most of the code from read_bundle_header() to parse_bundle_header()
that takes a file descriptor that is already opened for reading, and make
the former responsible only for opening the file and noticing errors.

As a logical consequence of this, is_bundle() helper function can be
implemented as a non-complaining variant of read_bundle_header() that
does not return an open file descriptor, and can be used to tighten
the check used to decide the use of bundle transport in transport_get()
function.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Junio C Hamano
2011-10-13 15:19:31 -07:00
parent e9ee84cf28
commit 2727b71f05
3 changed files with 33 additions and 9 deletions
Download Patch File Download Diff File Expand all files Collapse all files

39
bundle.c
View File

@ -40,19 +40,18 @@ static int strbuf_readline_fd(struct strbuf *sb, int fd)
return 0;
}
int read_bundle_header(const char *path, struct bundle_header *header)
static int parse_bundle_header(int fd, struct bundle_header *header,
const char *report_path)
{
struct strbuf buf = STRBUF_INIT;
int fd = open(path, O_RDONLY);
int status = 0;
if (fd < 0)
return error("could not open '%s'", path);
/* The bundle header begins with the signature */
if (strbuf_readline_fd(&buf, fd) ||
strcmp(buf.buf, bundle_signature)) {
error("'%s' does not look like a v2 bundle file", path);
if (report_path)
error("'%s' does not look like a v2 bundle file",
report_path);
status = -1;
goto abort;
}
@ -77,8 +76,9 @@ int read_bundle_header(const char *path, struct bundle_header *header)
if (get_sha1_hex(buf.buf, sha1) ||
(40 <= buf.len && !isspace(buf.buf[40])) ||
(!is_prereq && buf.len <= 40)) {
error("unrecognized header: %s%s (%d)",
(is_prereq ? "-" : ""), buf.buf, (int)buf.len);
if (report_path)
error("unrecognized header: %s%s (%d)",
(is_prereq ? "-" : ""), buf.buf, (int)buf.len);
status = -1;
break;
} else {
@ -98,6 +98,29 @@ int read_bundle_header(const char *path, struct bundle_header *header)
return fd;
}
int read_bundle_header(const char *path, struct bundle_header *header)
{
int fd = open(path, O_RDONLY);
if (fd < 0)
return error("could not open '%s'", path);
return parse_bundle_header(fd, header, path);
}
int is_bundle(const char *path, int quiet)
{
struct bundle_header header;
int fd = open(path, O_RDONLY);
if (fd < 0)
return 0;
memset(&header, 0, sizeof(header));
fd = parse_bundle_header(fd, &header, quiet ? NULL : path);
if (fd >= 0)
close(fd);
return (fd >= 0);
}
static int list_refs(struct ref_list *r, int argc, const char **argv)
{
int i;