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4b9ced278c
git-commit-vandalism/pretty.c
René Scharfe 9dbe7c3d7f pretty: handle broken commit headers gracefully 
Centralize the parsing of the date and time zone strings in the new
helper function show_ident_date() and make sure it checks the pointers
provided by split_ident_line() for NULL before use.

Reported-by: Ivan Lyapunov <dront78@gmail.com>
Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-04-17 14:50:36 -07:00

1587 lines
38 KiB
C
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#include "cache.h"
#include "commit.h"
#include "utf8.h"
#include "diff.h"
#include "revision.h"
#include "string-list.h"
#include "mailmap.h"
#include "log-tree.h"
#include "notes.h"
#include "color.h"
#include "reflog-walk.h"
#include "gpg-interface.h"
static char *user_format;
static struct cmt_fmt_map {
const char *name;
enum cmit_fmt format;
int is_tformat;
int is_alias;
const char *user_format;
} *commit_formats;
static size_t builtin_formats_len;
static size_t commit_formats_len;
static size_t commit_formats_alloc;
static struct cmt_fmt_map *find_commit_format(const char *sought);
static void save_user_format(struct rev_info *rev, const char *cp, int is_tformat)
{
free(user_format);
user_format = xstrdup(cp);
if (is_tformat)
rev->use_terminator = 1;
rev->commit_format = CMIT_FMT_USERFORMAT;
}
static int git_pretty_formats_config(const char *var, const char *value, void *cb)
{
struct cmt_fmt_map *commit_format = NULL;
const char *name;
const char *fmt;
int i;
if (prefixcmp(var, "pretty."))
return 0;
name = var + strlen("pretty.");
for (i = 0; i < builtin_formats_len; i++) {
if (!strcmp(commit_formats[i].name, name))
return 0;
}
for (i = builtin_formats_len; i < commit_formats_len; i++) {
if (!strcmp(commit_formats[i].name, name)) {
commit_format = &commit_formats[i];
break;
}
}
if (!commit_format) {
ALLOC_GROW(commit_formats, commit_formats_len+1,
commit_formats_alloc);
commit_format = &commit_formats[commit_formats_len];
memset(commit_format, 0, sizeof(*commit_format));
commit_formats_len++;
}
commit_format->name = xstrdup(name);
commit_format->format = CMIT_FMT_USERFORMAT;
git_config_string(&fmt, var, value);
if (!prefixcmp(fmt, "format:") || !prefixcmp(fmt, "tformat:")) {
commit_format->is_tformat = fmt[0] == 't';
fmt = strchr(fmt, ':') + 1;
} else if (strchr(fmt, '%'))
commit_format->is_tformat = 1;
else
commit_format->is_alias = 1;
commit_format->user_format = fmt;
return 0;
}
static void setup_commit_formats(void)
{
struct cmt_fmt_map builtin_formats[] = {
{ "raw", CMIT_FMT_RAW, 0 },
{ "medium", CMIT_FMT_MEDIUM, 0 },
{ "short", CMIT_FMT_SHORT, 0 },
{ "email", CMIT_FMT_EMAIL, 0 },
{ "fuller", CMIT_FMT_FULLER, 0 },
{ "full", CMIT_FMT_FULL, 0 },
{ "oneline", CMIT_FMT_ONELINE, 1 }
};
commit_formats_len = ARRAY_SIZE(builtin_formats);
builtin_formats_len = commit_formats_len;
ALLOC_GROW(commit_formats, commit_formats_len, commit_formats_alloc);
memcpy(commit_formats, builtin_formats,
sizeof(*builtin_formats)*ARRAY_SIZE(builtin_formats));
git_config(git_pretty_formats_config, NULL);
}
static struct cmt_fmt_map *find_commit_format_recursive(const char *sought,
const char *original,
int num_redirections)
{
struct cmt_fmt_map *found = NULL;
size_t found_match_len = 0;
int i;
if (num_redirections >= commit_formats_len)
die("invalid --pretty format: "
"'%s' references an alias which points to itself",
original);
for (i = 0; i < commit_formats_len; i++) {
size_t match_len;
if (prefixcmp(commit_formats[i].name, sought))
continue;
match_len = strlen(commit_formats[i].name);
if (found == NULL || found_match_len > match_len) {
found = &commit_formats[i];
found_match_len = match_len;
}
}
if (found && found->is_alias) {
found = find_commit_format_recursive(found->user_format,
original,
num_redirections+1);
}
return found;
}
static struct cmt_fmt_map *find_commit_format(const char *sought)
{
if (!commit_formats)
setup_commit_formats();
return find_commit_format_recursive(sought, sought, 0);
}
void get_commit_format(const char *arg, struct rev_info *rev)
{
struct cmt_fmt_map *commit_format;
rev->use_terminator = 0;
if (!arg || !*arg) {
rev->commit_format = CMIT_FMT_DEFAULT;
return;
}
if (!prefixcmp(arg, "format:") || !prefixcmp(arg, "tformat:")) {
save_user_format(rev, strchr(arg, ':') + 1, arg[0] == 't');
return;
}
if (strchr(arg, '%')) {
save_user_format(rev, arg, 1);
return;
}
commit_format = find_commit_format(arg);
if (!commit_format)
die("invalid --pretty format: %s", arg);
rev->commit_format = commit_format->format;
rev->use_terminator = commit_format->is_tformat;
if (commit_format->format == CMIT_FMT_USERFORMAT) {
save_user_format(rev, commit_format->user_format,
commit_format->is_tformat);
}
}
/*
* Generic support for pretty-printing the header
*/
static int get_one_line(const char *msg)
{
int ret = 0;
for (;;) {
char c = *msg++;
if (!c)
break;
ret++;
if (c == '\n')
break;
}
return ret;
}
/* High bit set, or ISO-2022-INT */
static int non_ascii(int ch)
{
return !isascii(ch) || ch == '\033';
}
int has_non_ascii(const char *s)
{
int ch;
if (!s)
return 0;
while ((ch = *s++) != '\0') {
if (non_ascii(ch))
return 1;
}
return 0;
}
static int is_rfc822_special(char ch)
{
switch (ch) {
case '(':
case ')':
case '<':
case '>':
case '[':
case ']':
case ':':
case ';':
case '@':
case ',':
case '.':
case '"':
case '\\':
return 1;
default:
return 0;
}
}
static int needs_rfc822_quoting(const char *s, int len)
{
int i;
for (i = 0; i < len; i++)
if (is_rfc822_special(s[i]))
return 1;
return 0;
}
static int last_line_length(struct strbuf *sb)
{
int i;
/* How many bytes are already used on the last line? */
for (i = sb->len - 1; i >= 0; i--)
if (sb->buf[i] == '\n')
break;
return sb->len - (i + 1);
}
static void add_rfc822_quoted(struct strbuf *out, const char *s, int len)
{
int i;
/* just a guess, we may have to also backslash-quote */
strbuf_grow(out, len + 2);
strbuf_addch(out, '"');
for (i = 0; i < len; i++) {
switch (s[i]) {
case '"':
case '\\':
strbuf_addch(out, '\\');
/* fall through */
default:
strbuf_addch(out, s[i]);
}
}
strbuf_addch(out, '"');
}
enum rfc2047_type {
RFC2047_SUBJECT,
RFC2047_ADDRESS,
};
static int is_rfc2047_special(char ch, enum rfc2047_type type)
{
/*
* rfc2047, section 4.2:
*
* 8-bit values which correspond to printable ASCII characters other
* than "=", "?", and "_" (underscore), MAY be represented as those
* characters. (But see section 5 for restrictions.) In
* particular, SPACE and TAB MUST NOT be represented as themselves
* within encoded words.
*/
/*
* rule out non-ASCII characters and non-printable characters (the
* non-ASCII check should be redundant as isprint() is not localized
* and only knows about ASCII, but be defensive about that)
*/
if (non_ascii(ch) || !isprint(ch))
return 1;
/*
* rule out special printable characters (' ' should be the only
* whitespace character considered printable, but be defensive and use
* isspace())
*/
if (isspace(ch) || ch == '=' || ch == '?' || ch == '_')
return 1;
/*
* rfc2047, section 5.3:
*
* As a replacement for a 'word' entity within a 'phrase', for example,
* one that precedes an address in a From, To, or Cc header. The ABNF
* definition for 'phrase' from RFC 822 thus becomes:
*
* phrase = 1*( encoded-word / word )
*
* In this case the set of characters that may be used in a "Q"-encoded
* 'encoded-word' is restricted to: <upper and lower case ASCII
* letters, decimal digits, "!", "*", "+", "-", "/", "=", and "_"
* (underscore, ASCII 95.)>. An 'encoded-word' that appears within a
* 'phrase' MUST be separated from any adjacent 'word', 'text' or
* 'special' by 'linear-white-space'.
*/
if (type != RFC2047_ADDRESS)
return 0;
/* '=' and '_' are special cases and have been checked above */
return !(isalnum(ch) || ch == '!' || ch == '*' || ch == '+' || ch == '-' || ch == '/');
}
static int needs_rfc2047_encoding(const char *line, int len,
enum rfc2047_type type)
{
int i;
for (i = 0; i < len; i++) {
int ch = line[i];
if (non_ascii(ch) || ch == '\n')
return 1;
if ((i + 1 < len) && (ch == '=' && line[i+1] == '?'))
return 1;
}
return 0;
}
static void add_rfc2047(struct strbuf *sb, const char *line, size_t len,
const char *encoding, enum rfc2047_type type)
{
static const int max_encoded_length = 76; /* per rfc2047 */
int i;
int line_len = last_line_length(sb);
strbuf_grow(sb, len * 3 + strlen(encoding) + 100);
strbuf_addf(sb, "=?%s?q?", encoding);
line_len += strlen(encoding) + 5; /* 5 for =??q? */
while (len) {
/*
* RFC 2047, section 5 (3):
*
* Each 'encoded-word' MUST represent an integral number of
* characters. A multi-octet character may not be split across
* adjacent 'encoded- word's.
*/
const unsigned char *p = (const unsigned char *)line;
int chrlen = mbs_chrlen(&line, &len, encoding);
int is_special = (chrlen > 1) || is_rfc2047_special(*p, type);
/* "=%02X" * chrlen, or the byte itself */
const char *encoded_fmt = is_special ? "=%02X" : "%c";
int encoded_len = is_special ? 3 * chrlen : 1;
/*
* According to RFC 2047, we could encode the special character
* ' ' (space) with '_' (underscore) for readability. But many
* programs do not understand this and just leave the
* underscore in place. Thus, we do nothing special here, which
* causes ' ' to be encoded as '=20', avoiding this problem.
*/
if (line_len + encoded_len + 2 > max_encoded_length) {
/* It won't fit with trailing "?=" --- break the line */
strbuf_addf(sb, "?=\n =?%s?q?", encoding);
line_len = strlen(encoding) + 5 + 1; /* =??q? plus SP */
}
for (i = 0; i < chrlen; i++)
strbuf_addf(sb, encoded_fmt, p[i]);
line_len += encoded_len;
}
strbuf_addstr(sb, "?=");
}
static const char *show_ident_date(const struct ident_split *ident,
enum date_mode mode)
{
unsigned long date = 0;
int tz = 0;
if (ident->date_begin && ident->date_end)
date = strtoul(ident->date_begin, NULL, 10);
if (ident->tz_begin && ident->tz_end)
tz = strtol(ident->tz_begin, NULL, 10);
return show_date(date, tz, mode);
}
void pp_user_info(const struct pretty_print_context *pp,
const char *what, struct strbuf *sb,
const char *line, const char *encoding)
{
struct strbuf name;
struct strbuf mail;
struct ident_split ident;
int linelen;
char *line_end;
const char *mailbuf, *namebuf;
size_t namelen, maillen;
int max_length = 78; /* per rfc2822 */
if (pp->fmt == CMIT_FMT_ONELINE)
return;
line_end = strchr(line, '\n');
if (!line_end) {
line_end = strchr(line, '\0');
if (!line_end)
return;
}
linelen = ++line_end - line;
if (split_ident_line(&ident, line, linelen))
return;
mailbuf = ident.mail_begin;
maillen = ident.mail_end - ident.mail_begin;
namebuf = ident.name_begin;
namelen = ident.name_end - ident.name_begin;
if (pp->mailmap)
map_user(pp->mailmap, &mailbuf, &maillen, &namebuf, &namelen);
strbuf_init(&mail, 0);
strbuf_init(&name, 0);
strbuf_add(&mail, mailbuf, maillen);
strbuf_add(&name, namebuf, namelen);
namelen = name.len + mail.len + 3; /* ' ' + '<' + '>' */
if (pp->fmt == CMIT_FMT_EMAIL) {
strbuf_addstr(sb, "From: ");
if (needs_rfc2047_encoding(name.buf, name.len, RFC2047_ADDRESS)) {
add_rfc2047(sb, name.buf, name.len,
encoding, RFC2047_ADDRESS);
max_length = 76; /* per rfc2047 */
} else if (needs_rfc822_quoting(name.buf, name.len)) {
struct strbuf quoted = STRBUF_INIT;
add_rfc822_quoted(&quoted, name.buf, name.len);
strbuf_add_wrapped_bytes(sb, quoted.buf, quoted.len,
-6, 1, max_length);
strbuf_release(&quoted);
} else {
strbuf_add_wrapped_bytes(sb, name.buf, name.len,
-6, 1, max_length);
}
if (namelen - name.len + last_line_length(sb) > max_length)
strbuf_addch(sb, '\n');
strbuf_addf(sb, " <%s>\n", mail.buf);
} else {
strbuf_addf(sb, "%s: %.*s%s <%s>\n", what,
(pp->fmt == CMIT_FMT_FULLER) ? 4 : 0,
" ", name.buf, mail.buf);
}
strbuf_release(&mail);
strbuf_release(&name);
switch (pp->fmt) {
case CMIT_FMT_MEDIUM:
strbuf_addf(sb, "Date: %s\n",
show_ident_date(&ident, pp->date_mode));
break;
case CMIT_FMT_EMAIL:
strbuf_addf(sb, "Date: %s\n",
show_ident_date(&ident, DATE_RFC2822));
break;
case CMIT_FMT_FULLER:
strbuf_addf(sb, "%sDate: %s\n", what,
show_ident_date(&ident, pp->date_mode));
break;
default:
/* notin' */
break;
}
}
static int is_empty_line(const char *line, int *len_p)
{
int len = *len_p;
while (len && isspace(line[len-1]))
len--;
*len_p = len;
return !len;
}
static const char *skip_empty_lines(const char *msg)
{
for (;;) {
int linelen = get_one_line(msg);
int ll = linelen;
if (!linelen)
break;
if (!is_empty_line(msg, &ll))
break;
msg += linelen;
}
return msg;
}
static void add_merge_info(const struct pretty_print_context *pp,
struct strbuf *sb, const struct commit *commit)
{
struct commit_list *parent = commit->parents;
if ((pp->fmt == CMIT_FMT_ONELINE) || (pp->fmt == CMIT_FMT_EMAIL) ||
!parent || !parent->next)
return;
strbuf_addstr(sb, "Merge:");
while (parent) {
struct commit *p = parent->item;
const char *hex = NULL;
if (pp->abbrev)
hex = find_unique_abbrev(p->object.sha1, pp->abbrev);
if (!hex)
hex = sha1_to_hex(p->object.sha1);
parent = parent->next;
strbuf_addf(sb, " %s", hex);
}
strbuf_addch(sb, '\n');
}
static char *get_header(const struct commit *commit, const char *msg,
const char *key)
{
int key_len = strlen(key);
const char *line = msg;
while (line) {
const char *eol = strchr(line, '\n'), *next;
if (line == eol)
return NULL;
if (!eol) {
warning("malformed commit (header is missing newline): %s",
sha1_to_hex(commit->object.sha1));
eol = line + strlen(line);
next = NULL;
} else
next = eol + 1;
if (eol - line > key_len &&
!strncmp(line, key, key_len) &&
line[key_len] == ' ') {
return xmemdupz(line + key_len + 1, eol - line - key_len - 1);
}
line = next;
}
return NULL;
}
static char *replace_encoding_header(char *buf, const char *encoding)
{
struct strbuf tmp = STRBUF_INIT;
size_t start, len;
char *cp = buf;
/* guess if there is an encoding header before a \n\n */
while (strncmp(cp, "encoding ", strlen("encoding "))) {
cp = strchr(cp, '\n');
if (!cp || *++cp == '\n')
return buf;
}
start = cp - buf;
cp = strchr(cp, '\n');
if (!cp)
return buf; /* should not happen but be defensive */
len = cp + 1 - (buf + start);
strbuf_attach(&tmp, buf, strlen(buf), strlen(buf) + 1);
if (is_encoding_utf8(encoding)) {
/* we have re-coded to UTF-8; drop the header */
strbuf_remove(&tmp, start, len);
} else {
/* just replaces XXXX in 'encoding XXXX\n' */
strbuf_splice(&tmp, start + strlen("encoding "),
len - strlen("encoding \n"),
encoding, strlen(encoding));
}
return strbuf_detach(&tmp, NULL);
}
char *logmsg_reencode(const struct commit *commit,
const char *output_encoding)
{
static const char *utf8 = "UTF-8";
const char *use_encoding;
char *encoding;
char *msg = commit->buffer;
char *out;
if (!msg) {
enum object_type type;
unsigned long size;
msg = read_sha1_file(commit->object.sha1, &type, &size);
if (!msg)
die("Cannot read commit object %s",
sha1_to_hex(commit->object.sha1));
if (type != OBJ_COMMIT)
die("Expected commit for '%s', got %s",
sha1_to_hex(commit->object.sha1), typename(type));
}
if (!output_encoding || !*output_encoding)
return msg;
encoding = get_header(commit, msg, "encoding");
use_encoding = encoding ? encoding : utf8;
if (same_encoding(use_encoding, output_encoding)) {
/*
* No encoding work to be done. If we have no encoding header
* at all, then there's nothing to do, and we can return the
* message verbatim (whether newly allocated or not).
*/
if (!encoding)
return msg;
/*
* Otherwise, we still want to munge the encoding header in the
* result, which will be done by modifying the buffer. If we
* are using a fresh copy, we can reuse it. But if we are using
* the cached copy from commit->buffer, we need to duplicate it
* to avoid munging commit->buffer.
*/
out = msg;
if (out == commit->buffer)
out = xstrdup(out);
}
else {
/*
* There's actual encoding work to do. Do the reencoding, which
* still leaves the header to be replaced in the next step. At
* this point, we are done with msg. If we allocated a fresh
* copy, we can free it.
*/
out = reencode_string(msg, output_encoding, use_encoding);
if (out && msg != commit->buffer)
free(msg);
}
/*
* This replacement actually consumes the buffer we hand it, so we do
* not have to worry about freeing the old "out" here.
*/
if (out)
out = replace_encoding_header(out, output_encoding);
free(encoding);
/*
* If the re-encoding failed, out might be NULL here; in that
* case we just return the commit message verbatim.
*/
return out ? out : msg;
}
void logmsg_free(char *msg, const struct commit *commit)
{
if (msg != commit->buffer)
free(msg);
}
static int mailmap_name(const char **email, size_t *email_len,
const char **name, size_t *name_len)
{
static struct string_list *mail_map;
if (!mail_map) {
mail_map = xcalloc(1, sizeof(*mail_map));
read_mailmap(mail_map, NULL);
}
return mail_map->nr && map_user(mail_map, email, email_len, name, name_len);
}
static size_t format_person_part(struct strbuf *sb, char part,
const char *msg, int len, enum date_mode dmode)
{
/* currently all placeholders have same length */
const int placeholder_len = 2;
struct ident_split s;
const char *name, *mail;
size_t maillen, namelen;
if (split_ident_line(&s, msg, len) < 0)
goto skip;
name = s.name_begin;
namelen = s.name_end - s.name_begin;
mail = s.mail_begin;
maillen = s.mail_end - s.mail_begin;
if (part == 'N' || part == 'E') /* mailmap lookup */
mailmap_name(&mail, &maillen, &name, &namelen);
if (part == 'n' || part == 'N') { /* name */
strbuf_add(sb, name, namelen);
return placeholder_len;
}
if (part == 'e' || part == 'E') { /* email */
strbuf_add(sb, mail, maillen);
return placeholder_len;
}
if (!s.date_begin)
goto skip;
if (part == 't') { /* date, UNIX timestamp */
strbuf_add(sb, s.date_begin, s.date_end - s.date_begin);
return placeholder_len;
}
switch (part) {
case 'd': /* date */
strbuf_addstr(sb, show_ident_date(&s, dmode));
return placeholder_len;
case 'D': /* date, RFC2822 style */
strbuf_addstr(sb, show_ident_date(&s, DATE_RFC2822));
return placeholder_len;
case 'r': /* date, relative */
strbuf_addstr(sb, show_ident_date(&s, DATE_RELATIVE));
return placeholder_len;
case 'i': /* date, ISO 8601 */
strbuf_addstr(sb, show_ident_date(&s, DATE_ISO8601));
return placeholder_len;
}
skip:
/*
* reading from either a bogus commit, or a reflog entry with
* %gn, %ge, etc.; 'sb' cannot be updated, but we still need
* to compute a valid return value.
*/
if (part == 'n' || part == 'e' || part == 't' || part == 'd'
|| part == 'D' || part == 'r' || part == 'i')
return placeholder_len;
return 0; /* unknown placeholder */
}
struct chunk {
size_t off;
size_t len;
};
struct format_commit_context {
const struct commit *commit;
const struct pretty_print_context *pretty_ctx;
unsigned commit_header_parsed:1;
unsigned commit_message_parsed:1;
unsigned commit_signature_parsed:1;
struct {
char *gpg_output;
char *gpg_status;
char good_bad;
char *signer;
char *key;
} signature;
char *message;
size_t width, indent1, indent2;
/* These offsets are relative to the start of the commit message. */
struct chunk author;
struct chunk committer;
struct chunk encoding;
size_t message_off;
size_t subject_off;
size_t body_off;
/* The following ones are relative to the result struct strbuf. */
struct chunk abbrev_commit_hash;
struct chunk abbrev_tree_hash;
struct chunk abbrev_parent_hashes;
size_t wrap_start;
};
static int add_again(struct strbuf *sb, struct chunk *chunk)
{
if (chunk->len) {
strbuf_adddup(sb, chunk->off, chunk->len);
return 1;
}
/*
* We haven't seen this chunk before. Our caller is surely
* going to add it the hard way now. Remember the most likely
* start of the to-be-added chunk: the current end of the
* struct strbuf.
*/
chunk->off = sb->len;
return 0;
}
static void parse_commit_header(struct format_commit_context *context)
{
const char *msg = context->message;
int i;
for (i = 0; msg[i]; i++) {
int eol;
for (eol = i; msg[eol] && msg[eol] != '\n'; eol++)
; /* do nothing */
if (i == eol) {
break;
} else if (!prefixcmp(msg + i, "author ")) {
context->author.off = i + 7;
context->author.len = eol - i - 7;
} else if (!prefixcmp(msg + i, "committer ")) {
context->committer.off = i + 10;
context->committer.len = eol - i - 10;
} else if (!prefixcmp(msg + i, "encoding ")) {
context->encoding.off = i + 9;
context->encoding.len = eol - i - 9;
}
i = eol;
}
context->message_off = i;
context->commit_header_parsed = 1;
}
static int istitlechar(char c)
{
return (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') ||
(c >= '0' && c <= '9') || c == '.' || c == '_';
}
static void format_sanitized_subject(struct strbuf *sb, const char *msg)
{
size_t trimlen;
size_t start_len = sb->len;
int space = 2;
for (; *msg && *msg != '\n'; msg++) {
if (istitlechar(*msg)) {
if (space == 1)
strbuf_addch(sb, '-');
space = 0;
strbuf_addch(sb, *msg);
if (*msg == '.')
while (*(msg+1) == '.')
msg++;
} else
space |= 1;
}
/* trim any trailing '.' or '-' characters */
trimlen = 0;
while (sb->len - trimlen > start_len &&
(sb->buf[sb->len - 1 - trimlen] == '.'
|| sb->buf[sb->len - 1 - trimlen] == '-'))
trimlen++;
strbuf_remove(sb, sb->len - trimlen, trimlen);
}
const char *format_subject(struct strbuf *sb, const char *msg,
const char *line_separator)
{
int first = 1;
for (;;) {
const char *line = msg;
int linelen = get_one_line(line);
msg += linelen;
if (!linelen || is_empty_line(line, &linelen))
break;
if (!sb)
continue;
strbuf_grow(sb, linelen + 2);
if (!first)
strbuf_addstr(sb, line_separator);
strbuf_add(sb, line, linelen);
first = 0;
}
return msg;
}
static void parse_commit_message(struct format_commit_context *c)
{
const char *msg = c->message + c->message_off;
const char *start = c->message;
msg = skip_empty_lines(msg);
c->subject_off = msg - start;
msg = format_subject(NULL, msg, NULL);
msg = skip_empty_lines(msg);
c->body_off = msg - start;
c->commit_message_parsed = 1;
}
static void format_decoration(struct strbuf *sb, const struct commit *commit)
{
struct name_decoration *d;
const char *prefix = " (";
load_ref_decorations(DECORATE_SHORT_REFS);
d = lookup_decoration(&name_decoration, &commit->object);
while (d) {
strbuf_addstr(sb, prefix);
prefix = ", ";
strbuf_addstr(sb, d->name);
d = d->next;
}
if (prefix[0] == ',')
strbuf_addch(sb, ')');
}
static void strbuf_wrap(struct strbuf *sb, size_t pos,
size_t width, size_t indent1, size_t indent2)
{
struct strbuf tmp = STRBUF_INIT;
if (pos)
strbuf_add(&tmp, sb->buf, pos);
strbuf_add_wrapped_text(&tmp, sb->buf + pos,
(int) indent1, (int) indent2, (int) width);
strbuf_swap(&tmp, sb);
strbuf_release(&tmp);
}
static void rewrap_message_tail(struct strbuf *sb,
struct format_commit_context *c,
size_t new_width, size_t new_indent1,
size_t new_indent2)
{
if (c->width == new_width && c->indent1 == new_indent1 &&
c->indent2 == new_indent2)
return;
if (c->wrap_start < sb->len)
strbuf_wrap(sb, c->wrap_start, c->width, c->indent1, c->indent2);
c->wrap_start = sb->len;
c->width = new_width;
c->indent1 = new_indent1;
c->indent2 = new_indent2;
}
static struct {
char result;
const char *check;
} signature_check[] = {
{ 'G', "\n[GNUPG:] GOODSIG " },
{ 'B', "\n[GNUPG:] BADSIG " },
};
static void parse_signature_lines(struct format_commit_context *ctx)
{
const char *buf = ctx->signature.gpg_status;
int i;
for (i = 0; i < ARRAY_SIZE(signature_check); i++) {
const char *found = strstr(buf, signature_check[i].check);
const char *next;
if (!found)
continue;
ctx->signature.good_bad = signature_check[i].result;
found += strlen(signature_check[i].check);
ctx->signature.key = xmemdupz(found, 16);
found += 17;
next = strchrnul(found, '\n');
ctx->signature.signer = xmemdupz(found, next - found);
break;
}
}
static void parse_commit_signature(struct format_commit_context *ctx)
{
struct strbuf payload = STRBUF_INIT;
struct strbuf signature = STRBUF_INIT;
struct strbuf gpg_output = STRBUF_INIT;
struct strbuf gpg_status = STRBUF_INIT;
int status;
ctx->commit_signature_parsed = 1;
if (parse_signed_commit(ctx->commit->object.sha1,
&payload, &signature) <= 0)
goto out;
status = verify_signed_buffer(payload.buf, payload.len,
signature.buf, signature.len,
&gpg_output, &gpg_status);
if (status && !gpg_output.len)
goto out;
ctx->signature.gpg_output = strbuf_detach(&gpg_output, NULL);
ctx->signature.gpg_status = strbuf_detach(&gpg_status, NULL);
parse_signature_lines(ctx);
out:
strbuf_release(&gpg_status);
strbuf_release(&gpg_output);
strbuf_release(&payload);
strbuf_release(&signature);
}
static int format_reflog_person(struct strbuf *sb,
char part,
struct reflog_walk_info *log,
enum date_mode dmode)
{
const char *ident;
if (!log)
return 2;
ident = get_reflog_ident(log);
if (!ident)
return 2;
return format_person_part(sb, part, ident, strlen(ident), dmode);
}
static size_t format_commit_one(struct strbuf *sb, const char *placeholder,
void *context)
{
struct format_commit_context *c = context;
const struct commit *commit = c->commit;
const char *msg = c->message;
struct commit_list *p;
int h1, h2;
/* these are independent of the commit */
switch (placeholder[0]) {
case 'C':
if (placeholder[1] == '(') {
const char *begin = placeholder + 2;
const char *end = strchr(begin, ')');
char color[COLOR_MAXLEN];
if (!end)
return 0;
if (!prefixcmp(begin, "auto,")) {
if (!want_color(c->pretty_ctx->color))
return end - placeholder + 1;
begin += 5;
}
color_parse_mem(begin,
end - begin,
"--pretty format", color);
strbuf_addstr(sb, color);
return end - placeholder + 1;
}
if (!prefixcmp(placeholder + 1, "red")) {
strbuf_addstr(sb, GIT_COLOR_RED);
return 4;
} else if (!prefixcmp(placeholder + 1, "green")) {
strbuf_addstr(sb, GIT_COLOR_GREEN);
return 6;
} else if (!prefixcmp(placeholder + 1, "blue")) {
strbuf_addstr(sb, GIT_COLOR_BLUE);
return 5;
} else if (!prefixcmp(placeholder + 1, "reset")) {
strbuf_addstr(sb, GIT_COLOR_RESET);
return 6;
} else
return 0;
case 'n': /* newline */
strbuf_addch(sb, '\n');
return 1;
case 'x':
/* %x00 == NUL, %x0a == LF, etc. */
if (0 <= (h1 = hexval_table[0xff & placeholder[1]]) &&
h1 <= 16 &&
0 <= (h2 = hexval_table[0xff & placeholder[2]]) &&
h2 <= 16) {
strbuf_addch(sb, (h1<<4)|h2);
return 3;
} else
return 0;
case 'w':
if (placeholder[1] == '(') {
unsigned long width = 0, indent1 = 0, indent2 = 0;
char *next;
const char *start = placeholder + 2;
const char *end = strchr(start, ')');
if (!end)
return 0;
if (end > start) {
width = strtoul(start, &next, 10);
if (*next == ',') {
indent1 = strtoul(next + 1, &next, 10);
if (*next == ',') {
indent2 = strtoul(next + 1,
&next, 10);
}
}
if (*next != ')')
return 0;
}
rewrap_message_tail(sb, c, width, indent1, indent2);
return end - placeholder + 1;
} else
return 0;
}
/* these depend on the commit */
if (!commit->object.parsed)
parse_object(commit->object.sha1);
switch (placeholder[0]) {
case 'H': /* commit hash */
strbuf_addstr(sb, sha1_to_hex(commit->object.sha1));
return 1;
case 'h': /* abbreviated commit hash */
if (add_again(sb, &c->abbrev_commit_hash))
return 1;
strbuf_addstr(sb, find_unique_abbrev(commit->object.sha1,
c->pretty_ctx->abbrev));
c->abbrev_commit_hash.len = sb->len - c->abbrev_commit_hash.off;
return 1;
case 'T': /* tree hash */
strbuf_addstr(sb, sha1_to_hex(commit->tree->object.sha1));
return 1;
case 't': /* abbreviated tree hash */
if (add_again(sb, &c->abbrev_tree_hash))
return 1;
strbuf_addstr(sb, find_unique_abbrev(commit->tree->object.sha1,
c->pretty_ctx->abbrev));
c->abbrev_tree_hash.len = sb->len - c->abbrev_tree_hash.off;
return 1;
case 'P': /* parent hashes */
for (p = commit->parents; p; p = p->next) {
if (p != commit->parents)
strbuf_addch(sb, ' ');
strbuf_addstr(sb, sha1_to_hex(p->item->object.sha1));
}
return 1;
case 'p': /* abbreviated parent hashes */
if (add_again(sb, &c->abbrev_parent_hashes))
return 1;
for (p = commit->parents; p; p = p->next) {
if (p != commit->parents)
strbuf_addch(sb, ' ');
strbuf_addstr(sb, find_unique_abbrev(
p->item->object.sha1,
c->pretty_ctx->abbrev));
}
c->abbrev_parent_hashes.len = sb->len -
c->abbrev_parent_hashes.off;
return 1;
case 'm': /* left/right/bottom */
strbuf_addstr(sb, get_revision_mark(NULL, commit));
return 1;
case 'd':
format_decoration(sb, commit);
return 1;
case 'g': /* reflog info */
switch(placeholder[1]) {
case 'd': /* reflog selector */
case 'D':
if (c->pretty_ctx->reflog_info)
get_reflog_selector(sb,
c->pretty_ctx->reflog_info,
c->pretty_ctx->date_mode,
c->pretty_ctx->date_mode_explicit,
(placeholder[1] == 'd'));
return 2;
case 's': /* reflog message */
if (c->pretty_ctx->reflog_info)
get_reflog_message(sb, c->pretty_ctx->reflog_info);
return 2;
case 'n':
case 'N':
case 'e':
case 'E':
return format_reflog_person(sb,
placeholder[1],
c->pretty_ctx->reflog_info,
c->pretty_ctx->date_mode);
}
return 0; /* unknown %g placeholder */
case 'N':
if (c->pretty_ctx->notes_message) {
strbuf_addstr(sb, c->pretty_ctx->notes_message);
return 1;
}
return 0;
}
if (placeholder[0] == 'G') {
if (!c->commit_signature_parsed)
parse_commit_signature(c);
switch (placeholder[1]) {
case 'G':
if (c->signature.gpg_output)
strbuf_addstr(sb, c->signature.gpg_output);
break;
case '?':
switch (c->signature.good_bad) {
case 'G':
case 'B':
strbuf_addch(sb, c->signature.good_bad);
}
break;
case 'S':
if (c->signature.signer)
strbuf_addstr(sb, c->signature.signer);
break;
case 'K':
if (c->signature.key)
strbuf_addstr(sb, c->signature.key);
break;
}
return 2;
}
/* For the rest we have to parse the commit header. */
if (!c->commit_header_parsed)
parse_commit_header(c);
switch (placeholder[0]) {
case 'a': /* author ... */
return format_person_part(sb, placeholder[1],
msg + c->author.off, c->author.len,
c->pretty_ctx->date_mode);
case 'c': /* committer ... */
return format_person_part(sb, placeholder[1],
msg + c->committer.off, c->committer.len,
c->pretty_ctx->date_mode);
case 'e': /* encoding */
strbuf_add(sb, msg + c->encoding.off, c->encoding.len);
return 1;
case 'B': /* raw body */
/* message_off is always left at the initial newline */
strbuf_addstr(sb, msg + c->message_off + 1);
return 1;
}
/* Now we need to parse the commit message. */
if (!c->commit_message_parsed)
parse_commit_message(c);
switch (placeholder[0]) {
case 's': /* subject */
format_subject(sb, msg + c->subject_off, " ");
return 1;
case 'f': /* sanitized subject */
format_sanitized_subject(sb, msg + c->subject_off);
return 1;
case 'b': /* body */
strbuf_addstr(sb, msg + c->body_off);
return 1;
}
return 0; /* unknown placeholder */
}
static size_t format_commit_item(struct strbuf *sb, const char *placeholder,
void *context)
{
int consumed;
size_t orig_len;
enum {
NO_MAGIC,
ADD_LF_BEFORE_NON_EMPTY,
DEL_LF_BEFORE_EMPTY,
ADD_SP_BEFORE_NON_EMPTY
} magic = NO_MAGIC;
switch (placeholder[0]) {
case '-':
magic = DEL_LF_BEFORE_EMPTY;
break;
case '+':
magic = ADD_LF_BEFORE_NON_EMPTY;
break;
case ' ':
magic = ADD_SP_BEFORE_NON_EMPTY;
break;
default:
break;
}
if (magic != NO_MAGIC)
placeholder++;
orig_len = sb->len;
consumed = format_commit_one(sb, placeholder, context);
if (magic == NO_MAGIC)
return consumed;
if ((orig_len == sb->len) && magic == DEL_LF_BEFORE_EMPTY) {
while (sb->len && sb->buf[sb->len - 1] == '\n')
strbuf_setlen(sb, sb->len - 1);
} else if (orig_len != sb->len) {
if (magic == ADD_LF_BEFORE_NON_EMPTY)
strbuf_insert(sb, orig_len, "\n", 1);
else if (magic == ADD_SP_BEFORE_NON_EMPTY)
strbuf_insert(sb, orig_len, " ", 1);
}
return consumed + 1;
}
static size_t userformat_want_item(struct strbuf *sb, const char *placeholder,
void *context)
{
struct userformat_want *w = context;
if (*placeholder == '+' || *placeholder == '-' || *placeholder == ' ')
placeholder++;
switch (*placeholder) {
case 'N':
w->notes = 1;
break;
}
return 0;
}
void userformat_find_requirements(const char *fmt, struct userformat_want *w)
{
struct strbuf dummy = STRBUF_INIT;
if (!fmt) {
if (!user_format)
return;
fmt = user_format;
}
strbuf_expand(&dummy, fmt, userformat_want_item, w);
strbuf_release(&dummy);
}
void format_commit_message(const struct commit *commit,
const char *format, struct strbuf *sb,
const struct pretty_print_context *pretty_ctx)
{
struct format_commit_context context;
const char *output_enc = pretty_ctx->output_encoding;
memset(&context, 0, sizeof(context));
context.commit = commit;
context.pretty_ctx = pretty_ctx;
context.wrap_start = sb->len;
context.message = logmsg_reencode(commit, output_enc);
strbuf_expand(sb, format, format_commit_item, &context);
rewrap_message_tail(sb, &context, 0, 0, 0);
logmsg_free(context.message, commit);
free(context.signature.gpg_output);
free(context.signature.signer);
}
static void pp_header(const struct pretty_print_context *pp,
const char *encoding,
const struct commit *commit,
const char **msg_p,
struct strbuf *sb)
{
int parents_shown = 0;
for (;;) {
const char *line = *msg_p;
int linelen = get_one_line(*msg_p);
if (!linelen)
return;
*msg_p += linelen;
if (linelen == 1)
/* End of header */
return;
if (pp->fmt == CMIT_FMT_RAW) {
strbuf_add(sb, line, linelen);
continue;
}
if (!prefixcmp(line, "parent ")) {
if (linelen != 48)
die("bad parent line in commit");
continue;
}
if (!parents_shown) {
struct commit_list *parent;
int num;
for (parent = commit->parents, num = 0;
parent;
parent = parent->next, num++)
;
/* with enough slop */
strbuf_grow(sb, num * 50 + 20);
add_merge_info(pp, sb, commit);
parents_shown = 1;
}
/*
* MEDIUM == DEFAULT shows only author with dates.
* FULL shows both authors but not dates.
* FULLER shows both authors and dates.
*/
if (!prefixcmp(line, "author ")) {
strbuf_grow(sb, linelen + 80);
pp_user_info(pp, "Author", sb, line + 7, encoding);
}
if (!prefixcmp(line, "committer ") &&
(pp->fmt == CMIT_FMT_FULL || pp->fmt == CMIT_FMT_FULLER)) {
strbuf_grow(sb, linelen + 80);
pp_user_info(pp, "Commit", sb, line + 10, encoding);
}
}
}
void pp_title_line(const struct pretty_print_context *pp,
const char **msg_p,
struct strbuf *sb,
const char *encoding,
int need_8bit_cte)
{
static const int max_length = 78; /* per rfc2047 */
struct strbuf title;
strbuf_init(&title, 80);
*msg_p = format_subject(&title, *msg_p,
pp->preserve_subject ? "\n" : " ");
strbuf_grow(sb, title.len + 1024);
if (pp->subject) {
strbuf_addstr(sb, pp->subject);
if (needs_rfc2047_encoding(title.buf, title.len, RFC2047_SUBJECT))
add_rfc2047(sb, title.buf, title.len,
encoding, RFC2047_SUBJECT);
else
strbuf_add_wrapped_bytes(sb, title.buf, title.len,
-last_line_length(sb), 1, max_length);
} else {
strbuf_addbuf(sb, &title);
}
strbuf_addch(sb, '\n');
if (need_8bit_cte > 0) {
const char *header_fmt =
"MIME-Version: 1.0\n"
"Content-Type: text/plain; charset=%s\n"
"Content-Transfer-Encoding: 8bit\n";
strbuf_addf(sb, header_fmt, encoding);
}
if (pp->after_subject) {
strbuf_addstr(sb, pp->after_subject);
}
if (pp->fmt == CMIT_FMT_EMAIL) {
strbuf_addch(sb, '\n');
}
strbuf_release(&title);
}
void pp_remainder(const struct pretty_print_context *pp,
const char **msg_p,
struct strbuf *sb,
int indent)
{
int first = 1;
for (;;) {
const char *line = *msg_p;
int linelen = get_one_line(line);
*msg_p += linelen;
if (!linelen)
break;
if (is_empty_line(line, &linelen)) {
if (first)
continue;
if (pp->fmt == CMIT_FMT_SHORT)
break;
}
first = 0;
strbuf_grow(sb, linelen + indent + 20);
if (indent) {
memset(sb->buf + sb->len, ' ', indent);
strbuf_setlen(sb, sb->len + indent);
}
strbuf_add(sb, line, linelen);
strbuf_addch(sb, '\n');
}
}
void pretty_print_commit(const struct pretty_print_context *pp,
const struct commit *commit,
struct strbuf *sb)
{
unsigned long beginning_of_body;
int indent = 4;
const char *msg;
char *reencoded;
const char *encoding;
int need_8bit_cte = pp->need_8bit_cte;
if (pp->fmt == CMIT_FMT_USERFORMAT) {
format_commit_message(commit, user_format, sb, pp);
return;
}
encoding = get_log_output_encoding();
msg = reencoded = logmsg_reencode(commit, encoding);
if (pp->fmt == CMIT_FMT_ONELINE || pp->fmt == CMIT_FMT_EMAIL)
indent = 0;
/*
* We need to check and emit Content-type: to mark it
* as 8-bit if we haven't done so.
*/
if (pp->fmt == CMIT_FMT_EMAIL && need_8bit_cte == 0) {
int i, ch, in_body;
for (in_body = i = 0; (ch = msg[i]); i++) {
if (!in_body) {
/* author could be non 7-bit ASCII but
* the log may be so; skip over the
* header part first.
*/
if (ch == '\n' && msg[i+1] == '\n')
in_body = 1;
}
else if (non_ascii(ch)) {
need_8bit_cte = 1;
break;
}
}
}
pp_header(pp, encoding, commit, &msg, sb);
if (pp->fmt != CMIT_FMT_ONELINE && !pp->subject) {
strbuf_addch(sb, '\n');
}
/* Skip excess blank lines at the beginning of body, if any... */
msg = skip_empty_lines(msg);
/* These formats treat the title line specially. */
if (pp->fmt == CMIT_FMT_ONELINE || pp->fmt == CMIT_FMT_EMAIL)
pp_title_line(pp, &msg, sb, encoding, need_8bit_cte);
beginning_of_body = sb->len;
if (pp->fmt != CMIT_FMT_ONELINE)
pp_remainder(pp, &msg, sb, indent);
strbuf_rtrim(sb);
/* Make sure there is an EOLN for the non-oneline case */
if (pp->fmt != CMIT_FMT_ONELINE)
strbuf_addch(sb, '\n');
/*
* The caller may append additional body text in e-mail
* format. Make sure we did not strip the blank line
* between the header and the body.
*/
if (pp->fmt == CMIT_FMT_EMAIL && sb->len <= beginning_of_body)
strbuf_addch(sb, '\n');
logmsg_free(reencoded, commit);
}
void pp_commit_easy(enum cmit_fmt fmt, const struct commit *commit,
struct strbuf *sb)
{
struct pretty_print_context pp = {0};
pp.fmt = fmt;
pretty_print_commit(&pp, commit, sb);
}
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