mirror of
https://github.com/git/git.git
synced 2024-11-05 00:37:55 +01:00
b9ab810b18
get_one_patchid() uses a rather dumb heuristic to determine if the passed buffer is part of the next commit. Whenever the first 40 bytes are a valid hexadecimal sha1 representation, get_one_patchid() returns next_sha1. Once the current line is longer than the fixed buffer, this will break (provided the additional bytes make a valid hexadecimal sha1). As a result patch-id returns incorrect results. Instead, use strbuf and read one line at a time. Helped-by: Jeff King <peff@peff.net> Signed-off-by: Michael Schubert <mschub@elegosoft.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
157 lines
3.1 KiB
C
157 lines
3.1 KiB
C
#include "builtin.h"
|
|
|
|
static void flush_current_id(int patchlen, unsigned char *id, git_SHA_CTX *c)
|
|
{
|
|
unsigned char result[20];
|
|
char name[50];
|
|
|
|
if (!patchlen)
|
|
return;
|
|
|
|
git_SHA1_Final(result, c);
|
|
memcpy(name, sha1_to_hex(id), 41);
|
|
printf("%s %s\n", sha1_to_hex(result), name);
|
|
git_SHA1_Init(c);
|
|
}
|
|
|
|
static int remove_space(char *line)
|
|
{
|
|
char *src = line;
|
|
char *dst = line;
|
|
unsigned char c;
|
|
|
|
while ((c = *src++) != '\0') {
|
|
if (!isspace(c))
|
|
*dst++ = c;
|
|
}
|
|
return dst - line;
|
|
}
|
|
|
|
static int scan_hunk_header(const char *p, int *p_before, int *p_after)
|
|
{
|
|
static const char digits[] = "0123456789";
|
|
const char *q, *r;
|
|
int n;
|
|
|
|
q = p + 4;
|
|
n = strspn(q, digits);
|
|
if (q[n] == ',') {
|
|
q += n + 1;
|
|
n = strspn(q, digits);
|
|
}
|
|
if (n == 0 || q[n] != ' ' || q[n+1] != '+')
|
|
return 0;
|
|
|
|
r = q + n + 2;
|
|
n = strspn(r, digits);
|
|
if (r[n] == ',') {
|
|
r += n + 1;
|
|
n = strspn(r, digits);
|
|
}
|
|
if (n == 0)
|
|
return 0;
|
|
|
|
*p_before = atoi(q);
|
|
*p_after = atoi(r);
|
|
return 1;
|
|
}
|
|
|
|
static int get_one_patchid(unsigned char *next_sha1, git_SHA_CTX *ctx, struct strbuf *line_buf)
|
|
{
|
|
int patchlen = 0, found_next = 0;
|
|
int before = -1, after = -1;
|
|
|
|
while (strbuf_getwholeline(line_buf, stdin, '\n') != EOF) {
|
|
char *line = line_buf->buf;
|
|
char *p = line;
|
|
int len;
|
|
|
|
if (!memcmp(line, "diff-tree ", 10))
|
|
p += 10;
|
|
else if (!memcmp(line, "commit ", 7))
|
|
p += 7;
|
|
else if (!memcmp(line, "From ", 5))
|
|
p += 5;
|
|
else if (!memcmp(line, "\\ ", 2) && 12 < strlen(line))
|
|
continue;
|
|
|
|
if (!get_sha1_hex(p, next_sha1)) {
|
|
found_next = 1;
|
|
break;
|
|
}
|
|
|
|
/* Ignore commit comments */
|
|
if (!patchlen && memcmp(line, "diff ", 5))
|
|
continue;
|
|
|
|
/* Parsing diff header? */
|
|
if (before == -1) {
|
|
if (!memcmp(line, "index ", 6))
|
|
continue;
|
|
else if (!memcmp(line, "--- ", 4))
|
|
before = after = 1;
|
|
else if (!isalpha(line[0]))
|
|
break;
|
|
}
|
|
|
|
/* Looking for a valid hunk header? */
|
|
if (before == 0 && after == 0) {
|
|
if (!memcmp(line, "@@ -", 4)) {
|
|
/* Parse next hunk, but ignore line numbers. */
|
|
scan_hunk_header(line, &before, &after);
|
|
continue;
|
|
}
|
|
|
|
/* Split at the end of the patch. */
|
|
if (memcmp(line, "diff ", 5))
|
|
break;
|
|
|
|
/* Else we're parsing another header. */
|
|
before = after = -1;
|
|
}
|
|
|
|
/* If we get here, we're inside a hunk. */
|
|
if (line[0] == '-' || line[0] == ' ')
|
|
before--;
|
|
if (line[0] == '+' || line[0] == ' ')
|
|
after--;
|
|
|
|
/* Compute the sha without whitespace */
|
|
len = remove_space(line);
|
|
patchlen += len;
|
|
git_SHA1_Update(ctx, line, len);
|
|
}
|
|
|
|
if (!found_next)
|
|
hashclr(next_sha1);
|
|
|
|
return patchlen;
|
|
}
|
|
|
|
static void generate_id_list(void)
|
|
{
|
|
unsigned char sha1[20], n[20];
|
|
git_SHA_CTX ctx;
|
|
int patchlen;
|
|
struct strbuf line_buf = STRBUF_INIT;
|
|
|
|
git_SHA1_Init(&ctx);
|
|
hashclr(sha1);
|
|
while (!feof(stdin)) {
|
|
patchlen = get_one_patchid(n, &ctx, &line_buf);
|
|
flush_current_id(patchlen, sha1, &ctx);
|
|
hashcpy(sha1, n);
|
|
}
|
|
strbuf_release(&line_buf);
|
|
}
|
|
|
|
static const char patch_id_usage[] = "git patch-id < patch";
|
|
|
|
int cmd_patch_id(int argc, const char **argv, const char *prefix)
|
|
{
|
|
if (argc != 1)
|
|
usage(patch_id_usage);
|
|
|
|
generate_id_list();
|
|
return 0;
|
|
}
|