diff options
Diffstat (limited to 'third_party/git/pretty.c')
| -rw-r--r-- | third_party/git/pretty.c | 2016 |
1 files changed, 2016 insertions, 0 deletions
diff --git a/third_party/git/pretty.c b/third_party/git/pretty.c new file mode 100644 index 000000000000..28afc701b6a4 --- /dev/null +++ b/third_party/git/pretty.c @@ -0,0 +1,2016 @@ +#include "cache.h" +#include "config.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" +#include "trailer.h" + +static char *user_format; +static struct cmt_fmt_map { + const char *name; + enum cmit_fmt format; + int is_tformat; + int expand_tabs_in_log; + int is_alias; + enum date_mode_type default_date_mode_type; + 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); + +int commit_format_is_empty(enum cmit_fmt fmt) +{ + return fmt == CMIT_FMT_USERFORMAT && !*user_format; +} + +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 (!skip_prefix(var, "pretty.", &name)) + return 0; + + 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; + if (git_config_string(&fmt, var, value)) + return -1; + + if (skip_prefix(fmt, "format:", &fmt)) + commit_format->is_tformat = 0; + else if (skip_prefix(fmt, "tformat:", &fmt) || 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, 0 }, + { "medium", CMIT_FMT_MEDIUM, 0, 8 }, + { "short", CMIT_FMT_SHORT, 0, 0 }, + { "email", CMIT_FMT_EMAIL, 0, 0 }, + { "mboxrd", CMIT_FMT_MBOXRD, 0, 0 }, + { "fuller", CMIT_FMT_FULLER, 0, 8 }, + { "full", CMIT_FMT_FULL, 0, 8 }, + { "oneline", CMIT_FMT_ONELINE, 1, 0 }, + { "reference", CMIT_FMT_USERFORMAT, 1, 0, + 0, DATE_SHORT, "%C(auto)%h (%s, %ad)" }, + /* + * Please update $__git_log_pretty_formats in + * git-completion.bash when you add new formats. + */ + }; + commit_formats_len = ARRAY_SIZE(builtin_formats); + builtin_formats_len = commit_formats_len; + ALLOC_GROW(commit_formats, commit_formats_len, commit_formats_alloc); + COPY_ARRAY(commit_formats, 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 (!starts_with(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) { + rev->commit_format = CMIT_FMT_DEFAULT; + return; + } + if (skip_prefix(arg, "format:", &arg)) { + save_user_format(rev, arg, 0); + return; + } + + if (!*arg || skip_prefix(arg, "tformat:", &arg) || 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; + rev->expand_tabs_in_log_default = commit_format->expand_tabs_in_log; + if (!rev->date_mode_explicit && commit_format->default_date_mode_type) + rev->date_mode.type = commit_format->default_date_mode_type; + 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) +{ + 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, "?="); +} + +const char *show_ident_date(const struct ident_split *ident, + const struct date_mode *mode) +{ + timestamp_t date = 0; + long tz = 0; + + if (ident->date_begin && ident->date_end) + date = parse_timestamp(ident->date_begin, NULL, 10); + if (date_overflows(date)) + date = 0; + else { + if (ident->tz_begin && ident->tz_end) + tz = strtol(ident->tz_begin, NULL, 10); + if (tz >= INT_MAX || tz <= INT_MIN) + tz = 0; + } + return show_date(date, tz, mode); +} + +void pp_user_info(struct pretty_print_context *pp, + const char *what, struct strbuf *sb, + const char *line, const char *encoding) +{ + struct ident_split ident; + 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 = strchrnul(line, '\n'); + if (split_ident_line(&ident, line, line_end - line)) + 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); + + if (cmit_fmt_is_mail(pp->fmt)) { + if (pp->from_ident && ident_cmp(pp->from_ident, &ident)) { + struct strbuf buf = STRBUF_INIT; + + strbuf_addstr(&buf, "From: "); + strbuf_add(&buf, namebuf, namelen); + strbuf_addstr(&buf, " <"); + strbuf_add(&buf, mailbuf, maillen); + strbuf_addstr(&buf, ">\n"); + string_list_append(&pp->in_body_headers, + strbuf_detach(&buf, NULL)); + + mailbuf = pp->from_ident->mail_begin; + maillen = pp->from_ident->mail_end - mailbuf; + namebuf = pp->from_ident->name_begin; + namelen = pp->from_ident->name_end - namebuf; + } + + strbuf_addstr(sb, "From: "); + if (needs_rfc2047_encoding(namebuf, namelen)) { + add_rfc2047(sb, namebuf, namelen, + encoding, RFC2047_ADDRESS); + max_length = 76; /* per rfc2047 */ + } else if (needs_rfc822_quoting(namebuf, namelen)) { + struct strbuf quoted = STRBUF_INIT; + add_rfc822_quoted("ed, namebuf, namelen); + strbuf_add_wrapped_bytes(sb, quoted.buf, quoted.len, + -6, 1, max_length); + strbuf_release("ed); + } else { + strbuf_add_wrapped_bytes(sb, namebuf, namelen, + -6, 1, max_length); + } + + if (max_length < + last_line_length(sb) + strlen(" <") + maillen + strlen(">")) + strbuf_addch(sb, '\n'); + strbuf_addf(sb, " <%.*s>\n", (int)maillen, mailbuf); + } else { + strbuf_addf(sb, "%s: %.*s%.*s <%.*s>\n", what, + (pp->fmt == CMIT_FMT_FULLER) ? 4 : 0, " ", + (int)namelen, namebuf, (int)maillen, mailbuf); + } + + 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: + case CMIT_FMT_MBOXRD: + strbuf_addf(sb, "Date: %s\n", + show_ident_date(&ident, DATE_MODE(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_blank_line(const char *line, int *len_p) +{ + int len = *len_p; + while (len && isspace(line[len - 1])) + len--; + *len_p = len; + return !len; +} + +const char *skip_blank_lines(const char *msg) +{ + for (;;) { + int linelen = get_one_line(msg); + int ll = linelen; + if (!linelen) + break; + if (!is_blank_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) || (cmit_fmt_is_mail(pp->fmt)) || + !parent || !parent->next) + return; + + strbuf_addstr(sb, "Merge:"); + + while (parent) { + struct object_id *oidp = &parent->item->object.oid; + strbuf_addch(sb, ' '); + if (pp->abbrev) + strbuf_add_unique_abbrev(sb, oidp, pp->abbrev); + else + strbuf_addstr(sb, oid_to_hex(oidp)); + parent = parent->next; + } + strbuf_addch(sb, '\n'); +} + +static char *get_header(const char *msg, const char *key) +{ + size_t len; + const char *v = find_commit_header(msg, key, &len); + return v ? xmemdupz(v, len) : 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 (!starts_with(cp, "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); +} + +const char *repo_logmsg_reencode(struct repository *r, + const struct commit *commit, + char **commit_encoding, + const char *output_encoding) +{ + static const char *utf8 = "UTF-8"; + const char *use_encoding; + char *encoding; + const char *msg = repo_get_commit_buffer(r, commit, NULL); + char *out; + + if (!output_encoding || !*output_encoding) { + if (commit_encoding) + *commit_encoding = get_header(msg, "encoding"); + return msg; + } + encoding = get_header(msg, "encoding"); + if (commit_encoding) + *commit_encoding = 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 get_commit_buffer, we need to duplicate it + * to avoid munging the cached copy. + */ + if (msg == get_cached_commit_buffer(r, commit, NULL)) + out = xstrdup(msg); + else + out = (char *)msg; + } + 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) + repo_unuse_commit_buffer(r, commit, 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); + + if (!commit_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; +} + +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, + const struct 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' || part == 'L') /* 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 (part == 'l' || part == 'L') { /* local-part */ + const char *at = memchr(mail, '@', maillen); + if (at) + maillen = at - mail; + 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_MODE(RFC2822))); + return placeholder_len; + case 'r': /* date, relative */ + strbuf_addstr(sb, show_ident_date(&s, DATE_MODE(RELATIVE))); + return placeholder_len; + case 'i': /* date, ISO 8601-like */ + strbuf_addstr(sb, show_ident_date(&s, DATE_MODE(ISO8601))); + return placeholder_len; + case 'I': /* date, ISO 8601 strict */ + strbuf_addstr(sb, show_ident_date(&s, DATE_MODE(ISO8601_STRICT))); + return placeholder_len; + case 's': + strbuf_addstr(sb, show_ident_date(&s, DATE_MODE(SHORT))); + 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; +}; + +enum flush_type { + no_flush, + flush_right, + flush_left, + flush_left_and_steal, + flush_both +}; + +enum trunc_type { + trunc_none, + trunc_left, + trunc_middle, + trunc_right +}; + +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; + struct signature_check signature_check; + enum flush_type flush_type; + enum trunc_type truncate; + const char *message; + char *commit_encoding; + size_t width, indent1, indent2; + int auto_color; + int padding; + + /* These offsets are relative to the start of the commit message. */ + struct chunk author; + struct chunk committer; + size_t message_off; + size_t subject_off; + size_t body_off; + + /* The following ones are relative to the result struct strbuf. */ + size_t wrap_start; +}; + +static void parse_commit_header(struct format_commit_context *context) +{ + const char *msg = context->message; + int i; + + for (i = 0; msg[i]; i++) { + const char *name; + int eol; + for (eol = i; msg[eol] && msg[eol] != '\n'; eol++) + ; /* do nothing */ + + if (i == eol) { + break; + } else if (skip_prefix(msg + i, "author ", &name)) { + context->author.off = name - msg; + context->author.len = msg + eol - name; + } else if (skip_prefix(msg + i, "committer ", &name)) { + context->committer.off = name - msg; + context->committer.len = msg + eol - name; + } + 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_blank_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_blank_lines(msg); + c->subject_off = msg - start; + + msg = format_subject(NULL, msg, NULL); + msg = skip_blank_lines(msg); + c->body_off = msg - start; + + c->commit_message_parsed = 1; +} + +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 int format_reflog_person(struct strbuf *sb, + char part, + struct reflog_walk_info *log, + const struct 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 parse_color(struct strbuf *sb, /* in UTF-8 */ + const char *placeholder, + struct format_commit_context *c) +{ + const char *rest = placeholder; + const char *basic_color = NULL; + + if (placeholder[1] == '(') { + const char *begin = placeholder + 2; + const char *end = strchr(begin, ')'); + char color[COLOR_MAXLEN]; + + if (!end) + return 0; + + if (skip_prefix(begin, "auto,", &begin)) { + if (!want_color(c->pretty_ctx->color)) + return end - placeholder + 1; + } else if (skip_prefix(begin, "always,", &begin)) { + /* nothing to do; we do not respect want_color at all */ + } else { + /* the default is the same as "auto" */ + if (!want_color(c->pretty_ctx->color)) + return end - placeholder + 1; + } + + if (color_parse_mem(begin, end - begin, color) < 0) + die(_("unable to parse --pretty format")); + strbuf_addstr(sb, color); + return end - placeholder + 1; + } + + /* + * We handle things like "%C(red)" above; for historical reasons, there + * are a few colors that can be specified without parentheses (and + * they cannot support things like "auto" or "always" at all). + */ + if (skip_prefix(placeholder + 1, "red", &rest)) + basic_color = GIT_COLOR_RED; + else if (skip_prefix(placeholder + 1, "green", &rest)) + basic_color = GIT_COLOR_GREEN; + else if (skip_prefix(placeholder + 1, "blue", &rest)) + basic_color = GIT_COLOR_BLUE; + else if (skip_prefix(placeholder + 1, "reset", &rest)) + basic_color = GIT_COLOR_RESET; + + if (basic_color && want_color(c->pretty_ctx->color)) + strbuf_addstr(sb, basic_color); + + return rest - placeholder; +} + +static size_t parse_padding_placeholder(const char *placeholder, + struct format_commit_context *c) +{ + const char *ch = placeholder; + enum flush_type flush_type; + int to_column = 0; + + switch (*ch++) { + case '<': + flush_type = flush_right; + break; + case '>': + if (*ch == '<') { + flush_type = flush_both; + ch++; + } else if (*ch == '>') { + flush_type = flush_left_and_steal; + ch++; + } else + flush_type = flush_left; + break; + default: + return 0; + } + + /* the next value means "wide enough to that column" */ + if (*ch == '|') { + to_column = 1; + ch++; + } + + if (*ch == '(') { + const char *start = ch + 1; + const char *end = start + strcspn(start, ",)"); + char *next; + int width; + if (!end || end == start) + return 0; + width = strtol(start, &next, 10); + if (next == start || width == 0) + return 0; + if (width < 0) { + if (to_column) + width += term_columns(); + if (width < 0) + return 0; + } + c->padding = to_column ? -width : width; + c->flush_type = flush_type; + + if (*end == ',') { + start = end + 1; + end = strchr(start, ')'); + if (!end || end == start) + return 0; + if (starts_with(start, "trunc)")) + c->truncate = trunc_right; + else if (starts_with(start, "ltrunc)")) + c->truncate = trunc_left; + else if (starts_with(start, "mtrunc)")) + c->truncate = trunc_middle; + else + return 0; + } else + c->truncate = trunc_none; + + return end - placeholder + 1; + } + return 0; +} + +static int match_placeholder_arg_value(const char *to_parse, const char *candidate, + const char **end, const char **valuestart, + size_t *valuelen) +{ + const char *p; + + if (!(skip_prefix(to_parse, candidate, &p))) + return 0; + if (valuestart) { + if (*p == '=') { + *valuestart = p + 1; + *valuelen = strcspn(*valuestart, ",)"); + p = *valuestart + *valuelen; + } else { + if (*p != ',' && *p != ')') + return 0; + *valuestart = NULL; + *valuelen = 0; + } + } + if (*p == ',') { + *end = p + 1; + return 1; + } + if (*p == ')') { + *end = p; + return 1; + } + return 0; +} + +static int match_placeholder_bool_arg(const char *to_parse, const char *candidate, + const char **end, int *val) +{ + const char *argval; + char *strval; + size_t arglen; + int v; + + if (!match_placeholder_arg_value(to_parse, candidate, end, &argval, &arglen)) + return 0; + + if (!argval) { + *val = 1; + return 1; + } + + strval = xstrndup(argval, arglen); + v = git_parse_maybe_bool(strval); + free(strval); + + if (v == -1) + return 0; + + *val = v; + + return 1; +} + +static int format_trailer_match_cb(const struct strbuf *key, void *ud) +{ + const struct string_list *list = ud; + const struct string_list_item *item; + + for_each_string_list_item (item, list) { + if (key->len == (uintptr_t)item->util && + !strncasecmp(item->string, key->buf, key->len)) + return 1; + } + return 0; +} + +static size_t format_commit_one(struct strbuf *sb, /* in UTF-8 */ + 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; + const char *arg; + size_t res; + char **slot; + + /* these are independent of the commit */ + res = strbuf_expand_literal_cb(sb, placeholder, NULL); + if (res) + return res; + + switch (placeholder[0]) { + case 'C': + if (starts_with(placeholder + 1, "(auto)")) { + c->auto_color = want_color(c->pretty_ctx->color); + if (c->auto_color && sb->len) + strbuf_addstr(sb, GIT_COLOR_RESET); + return 7; /* consumed 7 bytes, "C(auto)" */ + } else { + int ret = parse_color(sb, placeholder, c); + if (ret) + c->auto_color = 0; + /* + * Otherwise, we decided to treat %C<unknown> + * as a literal string, and the previous + * %C(auto) is still valid. + */ + return ret; + } + 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; + + case '<': + case '>': + return parse_padding_placeholder(placeholder, c); + } + + /* these depend on the commit */ + if (!commit->object.parsed) + parse_object(the_repository, &commit->object.oid); + + switch (placeholder[0]) { + case 'H': /* commit hash */ + strbuf_addstr(sb, diff_get_color(c->auto_color, DIFF_COMMIT)); + strbuf_addstr(sb, oid_to_hex(&commit->object.oid)); + strbuf_addstr(sb, diff_get_color(c->auto_color, DIFF_RESET)); + return 1; + case 'h': /* abbreviated commit hash */ + strbuf_addstr(sb, diff_get_color(c->auto_color, DIFF_COMMIT)); + strbuf_add_unique_abbrev(sb, &commit->object.oid, + c->pretty_ctx->abbrev); + strbuf_addstr(sb, diff_get_color(c->auto_color, DIFF_RESET)); + return 1; + case 'T': /* tree hash */ + strbuf_addstr(sb, oid_to_hex(get_commit_tree_oid(commit))); + return 1; + case 't': /* abbreviated tree hash */ + strbuf_add_unique_abbrev(sb, + get_commit_tree_oid(commit), + c->pretty_ctx->abbrev); + return 1; + case 'P': /* parent hashes */ + for (p = commit->parents; p; p = p->next) { + if (p != commit->parents) + strbuf_addch(sb, ' '); + strbuf_addstr(sb, oid_to_hex(&p->item->object.oid)); + } + return 1; + case 'p': /* abbreviated parent hashes */ + for (p = commit->parents; p; p = p->next) { + if (p != commit->parents) + strbuf_addch(sb, ' '); + strbuf_add_unique_abbrev(sb, &p->item->object.oid, + c->pretty_ctx->abbrev); + } + return 1; + case 'm': /* left/right/bottom */ + strbuf_addstr(sb, get_revision_mark(NULL, commit)); + return 1; + case 'd': + format_decorations(sb, commit, c->auto_color); + return 1; + case 'D': + format_decorations_extended(sb, commit, c->auto_color, "", ", ", ""); + return 1; + case 'S': /* tag/branch like --source */ + if (!(c->pretty_ctx->rev && c->pretty_ctx->rev->sources)) + return 0; + slot = revision_sources_at(c->pretty_ctx->rev->sources, commit); + if (!(slot && *slot)) + return 0; + strbuf_addstr(sb, *slot); + 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->signature_check.result) + check_commit_signature(c->commit, &(c->signature_check)); + switch (placeholder[1]) { + case 'G': + if (c->signature_check.gpg_output) + strbuf_addstr(sb, c->signature_check.gpg_output); + break; + case '?': + switch (c->signature_check.result) { + case 'G': + switch (c->signature_check.trust_level) { + case TRUST_UNDEFINED: + case TRUST_NEVER: + strbuf_addch(sb, 'U'); + break; + default: + strbuf_addch(sb, 'G'); + break; + } + break; + case 'B': + case 'E': + case 'N': + case 'X': + case 'Y': + case 'R': + strbuf_addch(sb, c->signature_check.result); + } + break; + case 'S': + if (c->signature_check.signer) + strbuf_addstr(sb, c->signature_check.signer); + break; + case 'K': + if (c->signature_check.key) + strbuf_addstr(sb, c->signature_check.key); + break; + case 'F': + if (c->signature_check.fingerprint) + strbuf_addstr(sb, c->signature_check.fingerprint); + break; + case 'P': + if (c->signature_check.primary_key_fingerprint) + strbuf_addstr(sb, c->signature_check.primary_key_fingerprint); + break; + case 'T': + switch (c->signature_check.trust_level) { + case TRUST_UNDEFINED: + strbuf_addstr(sb, "undefined"); + break; + case TRUST_NEVER: + strbuf_addstr(sb, "never"); + break; + case TRUST_MARGINAL: + strbuf_addstr(sb, "marginal"); + break; + case TRUST_FULLY: + strbuf_addstr(sb, "fully"); + break; + case TRUST_ULTIMATE: + strbuf_addstr(sb, "ultimate"); + break; + } + break; + default: + return 0; + } + 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 */ + if (c->commit_encoding) + strbuf_addstr(sb, c->commit_encoding); + 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; + } + + if (skip_prefix(placeholder, "(trailers", &arg)) { + struct process_trailer_options opts = PROCESS_TRAILER_OPTIONS_INIT; + struct string_list filter_list = STRING_LIST_INIT_NODUP; + struct strbuf sepbuf = STRBUF_INIT; + size_t ret = 0; + + opts.no_divider = 1; + + if (*arg == ':') { + arg++; + for (;;) { + const char *argval; + size_t arglen; + + if (match_placeholder_arg_value(arg, "key", &arg, &argval, &arglen)) { + uintptr_t len = arglen; + + if (!argval) + goto trailer_out; + + if (len && argval[len - 1] == ':') + len--; + string_list_append(&filter_list, argval)->util = (char *)len; + + opts.filter = format_trailer_match_cb; + opts.filter_data = &filter_list; + opts.only_trailers = 1; + } else if (match_placeholder_arg_value(arg, "separator", &arg, &argval, &arglen)) { + char *fmt; + + strbuf_reset(&sepbuf); + fmt = xstrndup(argval, arglen); + strbuf_expand(&sepbuf, fmt, strbuf_expand_literal_cb, NULL); + free(fmt); + opts.separator = &sepbuf; + } else if (!match_placeholder_bool_arg(arg, "only", &arg, &opts.only_trailers) && + !match_placeholder_bool_arg(arg, "unfold", &arg, &opts.unfold) && + !match_placeholder_bool_arg(arg, "valueonly", &arg, &opts.value_only)) + break; + } + } + if (*arg == ')') { + format_trailers_from_commit(sb, msg + c->subject_off, &opts); + ret = arg - placeholder + 1; + } + trailer_out: + string_list_clear(&filter_list, 0); + strbuf_release(&sepbuf); + return ret; + } + + return 0; /* unknown placeholder */ +} + +static size_t format_and_pad_commit(struct strbuf *sb, /* in UTF-8 */ + const char *placeholder, + struct format_commit_context *c) +{ + struct strbuf local_sb = STRBUF_INIT; + int total_consumed = 0, len, padding = c->padding; + if (padding < 0) { + const char *start = strrchr(sb->buf, '\n'); + int occupied; + if (!start) + start = sb->buf; + occupied = utf8_strnwidth(start, -1, 1); + occupied += c->pretty_ctx->graph_width; + padding = (-padding) - occupied; + } + while (1) { + int modifier = *placeholder == 'C'; + int consumed = format_commit_one(&local_sb, placeholder, c); + total_consumed += consumed; + + if (!modifier) + break; + + placeholder += consumed; + if (*placeholder != '%') + break; + placeholder++; + total_consumed++; + } + len = utf8_strnwidth(local_sb.buf, -1, 1); + + if (c->flush_type == flush_left_and_steal) { + const char *ch = sb->buf + sb->len - 1; + while (len > padding && ch > sb->buf) { + const char *p; + if (*ch == ' ') { + ch--; + padding++; + continue; + } + /* check for trailing ansi sequences */ + if (*ch != 'm') + break; + p = ch - 1; + while (ch - p < 10 && *p != '\033') + p--; + if (*p != '\033' || + ch + 1 - p != display_mode_esc_sequence_len(p)) + break; + /* + * got a good ansi sequence, put it back to + * local_sb as we're cutting sb + */ + strbuf_insert(&local_sb, 0, p, ch + 1 - p); + ch = p - 1; + } + strbuf_setlen(sb, ch + 1 - sb->buf); + c->flush_type = flush_left; + } + + if (len > padding) { + switch (c->truncate) { + case trunc_left: + strbuf_utf8_replace(&local_sb, + 0, len - (padding - 2), + ".."); + break; + case trunc_middle: + strbuf_utf8_replace(&local_sb, + padding / 2 - 1, + len - (padding - 2), + ".."); + break; + case trunc_right: + strbuf_utf8_replace(&local_sb, + padding - 2, len - (padding - 2), + ".."); + break; + case trunc_none: + break; + } + strbuf_addbuf(sb, &local_sb); + } else { + int sb_len = sb->len, offset = 0; + if (c->flush_type == flush_left) + offset = padding - len; + else if (c->flush_type == flush_both) + offset = (padding - len) / 2; + /* + * we calculate padding in columns, now + * convert it back to chars + */ + padding = padding - len + local_sb.len; + strbuf_addchars(sb, ' ', padding); + memcpy(sb->buf + sb_len + offset, local_sb.buf, + local_sb.len); + } + strbuf_release(&local_sb); + c->flush_type = no_flush; + return total_consumed; +} + +static size_t format_commit_item(struct strbuf *sb, /* in UTF-8 */ + 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; + if (((struct format_commit_context *)context)->flush_type != no_flush) + consumed = format_and_pad_commit(sb, placeholder, context); + else + 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_insertstr(sb, orig_len, "\n"); + else if (magic == ADD_SP_BEFORE_NON_EMPTY) + strbuf_insertstr(sb, orig_len, " "); + } + 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; + case 'S': + w->source = 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 repo_format_commit_message(struct repository *r, + const struct commit *commit, + const char *format, struct strbuf *sb, + const struct pretty_print_context *pretty_ctx) +{ + struct format_commit_context context = { + .commit = commit, + .pretty_ctx = pretty_ctx, + .wrap_start = sb->len + }; + const char *output_enc = pretty_ctx->output_encoding; + const char *utf8 = "UTF-8"; + + /* + * convert a commit message to UTF-8 first + * as far as 'format_commit_item' assumes it in UTF-8 + */ + context.message = repo_logmsg_reencode(r, commit, + &context.commit_encoding, + utf8); + + strbuf_expand(sb, format, format_commit_item, &context); + rewrap_message_tail(sb, &context, 0, 0, 0); + + /* then convert a commit message to an actual output encoding */ + if (output_enc) { + if (same_encoding(utf8, output_enc)) + output_enc = NULL; + } else { + if (context.commit_encoding && + !same_encoding(context.commit_encoding, utf8)) + output_enc = context.commit_encoding; + } + + if (output_enc) { + size_t outsz; + char *out = reencode_string_len(sb->buf, sb->len, + output_enc, utf8, &outsz); + if (out) + strbuf_attach(sb, out, outsz, outsz + 1); + } + + free(context.commit_encoding); + repo_unuse_commit_buffer(r, commit, context.message); +} + +static void pp_header(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 *name, *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 (starts_with(line, "parent ")) { + if (linelen != the_hash_algo->hexsz + 8) + die("bad parent line in commit"); + continue; + } + + if (!parents_shown) { + unsigned num = commit_list_count(commit->parents); + /* with enough slop */ + strbuf_grow(sb, num * (GIT_MAX_HEXSZ + 10) + 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 (skip_prefix(line, "author ", &name)) { + strbuf_grow(sb, linelen + 80); + pp_user_info(pp, "Author", sb, name, encoding); + } + if (skip_prefix(line, "committer ", &name) && + (pp->fmt == CMIT_FMT_FULL || pp->fmt == CMIT_FMT_FULLER)) { + strbuf_grow(sb, linelen + 80); + pp_user_info(pp, "Commit", sb, name, encoding); + } + } +} + +void pp_title_line(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->print_email_subject) { + if (pp->rev) + fmt_output_email_subject(sb, pp->rev); + if (needs_rfc2047_encoding(title.buf, title.len)) + 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) { + int i; + for (i = 0; i < pp->in_body_headers.nr; i++) { + if (has_non_ascii(pp->in_body_headers.items[i].string)) { + need_8bit_cte = 1; + break; + } + } + } + + 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 (cmit_fmt_is_mail(pp->fmt)) { + strbuf_addch(sb, '\n'); + } + + if (pp->in_body_headers.nr) { + int i; + for (i = 0; i < pp->in_body_headers.nr; i++) { + strbuf_addstr(sb, pp->in_body_headers.items[i].string); + free(pp->in_body_headers.items[i].string); + } + string_list_clear(&pp->in_body_headers, 0); + strbuf_addch(sb, '\n'); + } + + strbuf_release(&title); +} + +static int pp_utf8_width(const char *start, const char *end) +{ + int width = 0; + size_t remain = end - start; + + while (remain) { + int n = utf8_width(&start, &remain); + if (n < 0 || !start) + return -1; + width += n; + } + return width; +} + +static void strbuf_add_tabexpand(struct strbuf *sb, int tabwidth, + const char *line, int linelen) +{ + const char *tab; + + while ((tab = memchr(line, '\t', linelen)) != NULL) { + int width = pp_utf8_width(line, tab); + + /* + * If it wasn't well-formed utf8, or it + * had characters with badly defined + * width (control characters etc), just + * give up on trying to align things. + */ + if (width < 0) + break; + + /* Output the data .. */ + strbuf_add(sb, line, tab - line); + + /* .. and the de-tabified tab */ + strbuf_addchars(sb, ' ', tabwidth - (width % tabwidth)); + + /* Skip over the printed part .. */ + linelen -= tab + 1 - line; + line = tab + 1; + } + + /* + * Print out everything after the last tab without + * worrying about width - there's nothing more to + * align. + */ + strbuf_add(sb, line, linelen); +} + +/* + * pp_handle_indent() prints out the intendation, and + * the whole line (without the final newline), after + * de-tabifying. + */ +static void pp_handle_indent(struct pretty_print_context *pp, + struct strbuf *sb, int indent, + const char *line, int linelen) +{ + strbuf_addchars(sb, ' ', indent); + if (pp->expand_tabs_in_log) + strbuf_add_tabexpand(sb, pp->expand_tabs_in_log, line, linelen); + else + strbuf_add(sb, line, linelen); +} + +static int is_mboxrd_from(const char *line, int len) +{ + /* + * a line matching /^From $/ here would only have len == 4 + * at this point because is_empty_line would've trimmed all + * trailing space + */ + return len > 4 && starts_with(line + strspn(line, ">"), "From "); +} + +void pp_remainder(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_blank_line(line, &linelen)) { + if (first) + continue; + if (pp->fmt == CMIT_FMT_SHORT) + break; + } + first = 0; + + strbuf_grow(sb, linelen + indent + 20); + if (indent) + pp_handle_indent(pp, sb, indent, line, linelen); + else if (pp->expand_tabs_in_log) + strbuf_add_tabexpand(sb, pp->expand_tabs_in_log, + line, linelen); + else { + if (pp->fmt == CMIT_FMT_MBOXRD && + is_mboxrd_from(line, linelen)) + strbuf_addch(sb, '>'); + + strbuf_add(sb, line, linelen); + } + strbuf_addch(sb, '\n'); + } +} + +void pretty_print_commit(struct pretty_print_context *pp, + const struct commit *commit, + struct strbuf *sb) +{ + unsigned long beginning_of_body; + int indent = 4; + const char *msg; + const 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, NULL, encoding); + + if (pp->fmt == CMIT_FMT_ONELINE || cmit_fmt_is_mail(pp->fmt)) + indent = 0; + + /* + * We need to check and emit Content-type: to mark it + * as 8-bit if we haven't done so. + */ + if (cmit_fmt_is_mail(pp->fmt) && 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->print_email_subject) { + strbuf_addch(sb, '\n'); + } + + /* Skip excess blank lines at the beginning of body, if any... */ + msg = skip_blank_lines(msg); + + /* These formats treat the title line specially. */ + if (pp->fmt == CMIT_FMT_ONELINE || cmit_fmt_is_mail(pp->fmt)) + 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 (cmit_fmt_is_mail(pp->fmt) && sb->len <= beginning_of_body) + strbuf_addch(sb, '\n'); + + unuse_commit_buffer(commit, reencoded); +} + +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); +} |