diff options
Diffstat (limited to 'builtin/mailinfo.c')
| -rw-r--r-- | builtin/mailinfo.c | 1064 |
1 files changed, 1064 insertions, 0 deletions
diff --git a/builtin/mailinfo.c b/builtin/mailinfo.c new file mode 100644 index 0000000000..a50ac2256c --- /dev/null +++ b/builtin/mailinfo.c @@ -0,0 +1,1064 @@ +/* + * Another stupid program, this one parsing the headers of an + * email to figure out authorship and subject + */ +#include "cache.h" +#include "builtin.h" +#include "utf8.h" +#include "strbuf.h" + +static FILE *cmitmsg, *patchfile, *fin, *fout; + +static int keep_subject; +static int keep_non_patch_brackets_in_subject; +static const char *metainfo_charset; +static struct strbuf line = STRBUF_INIT; +static struct strbuf name = STRBUF_INIT; +static struct strbuf email = STRBUF_INIT; + +static enum { + TE_DONTCARE, TE_QP, TE_BASE64, +} transfer_encoding; +static enum { + TYPE_TEXT, TYPE_OTHER, +} message_type; + +static struct strbuf charset = STRBUF_INIT; +static int patch_lines; +static struct strbuf **p_hdr_data, **s_hdr_data; +static int use_scissors; +static int use_inbody_headers = 1; + +#define MAX_HDR_PARSED 10 +#define MAX_BOUNDARIES 5 + +static void cleanup_space(struct strbuf *sb); + + +static void get_sane_name(struct strbuf *out, struct strbuf *name, struct strbuf *email) +{ + struct strbuf *src = name; + if (name->len < 3 || 60 < name->len || strchr(name->buf, '@') || + strchr(name->buf, '<') || strchr(name->buf, '>')) + src = email; + else if (name == out) + return; + strbuf_reset(out); + strbuf_addbuf(out, src); +} + +static void parse_bogus_from(const struct strbuf *line) +{ + /* John Doe <johndoe> */ + + char *bra, *ket; + /* This is fallback, so do not bother if we already have an + * e-mail address. + */ + if (email.len) + return; + + bra = strchr(line->buf, '<'); + if (!bra) + return; + ket = strchr(bra, '>'); + if (!ket) + return; + + strbuf_reset(&email); + strbuf_add(&email, bra + 1, ket - bra - 1); + + strbuf_reset(&name); + strbuf_add(&name, line->buf, bra - line->buf); + strbuf_trim(&name); + get_sane_name(&name, &name, &email); +} + +static void handle_from(const struct strbuf *from) +{ + char *at; + size_t el; + struct strbuf f; + + strbuf_init(&f, from->len); + strbuf_addbuf(&f, from); + + at = strchr(f.buf, '@'); + if (!at) { + parse_bogus_from(from); + return; + } + + /* + * If we already have one email, don't take any confusing lines + */ + if (email.len && strchr(at + 1, '@')) { + strbuf_release(&f); + return; + } + + /* Pick up the string around '@', possibly delimited with <> + * pair; that is the email part. + */ + while (at > f.buf) { + char c = at[-1]; + if (isspace(c)) + break; + if (c == '<') { + at[-1] = ' '; + break; + } + at--; + } + el = strcspn(at, " \n\t\r\v\f>"); + strbuf_reset(&email); + strbuf_add(&email, at, el); + strbuf_remove(&f, at - f.buf, el + (at[el] ? 1 : 0)); + + /* The remainder is name. It could be + * + * - "John Doe <john.doe@xz>" (a), or + * - "john.doe@xz (John Doe)" (b), or + * - "John (zzz) Doe <john.doe@xz> (Comment)" (c) + * + * but we have removed the email part, so + * + * - remove extra spaces which could stay after email (case 'c'), and + * - trim from both ends, possibly removing the () pair at the end + * (cases 'a' and 'b'). + */ + cleanup_space(&f); + strbuf_trim(&f); + if (f.buf[0] == '(' && f.len && f.buf[f.len - 1] == ')') { + strbuf_remove(&f, 0, 1); + strbuf_setlen(&f, f.len - 1); + } + + get_sane_name(&name, &f, &email); + strbuf_release(&f); +} + +static void handle_header(struct strbuf **out, const struct strbuf *line) +{ + if (!*out) { + *out = xmalloc(sizeof(struct strbuf)); + strbuf_init(*out, line->len); + } else + strbuf_reset(*out); + + strbuf_addbuf(*out, line); +} + +/* NOTE NOTE NOTE. We do not claim we do full MIME. We just attempt + * to have enough heuristics to grok MIME encoded patches often found + * on our mailing lists. For example, we do not even treat header lines + * case insensitively. + */ + +static int slurp_attr(const char *line, const char *name, struct strbuf *attr) +{ + const char *ends, *ap = strcasestr(line, name); + size_t sz; + + if (!ap) { + strbuf_setlen(attr, 0); + return 0; + } + ap += strlen(name); + if (*ap == '"') { + ap++; + ends = "\""; + } + else + ends = "; \t"; + sz = strcspn(ap, ends); + strbuf_add(attr, ap, sz); + return 1; +} + +static struct strbuf *content[MAX_BOUNDARIES]; + +static struct strbuf **content_top = content; + +static void handle_content_type(struct strbuf *line) +{ + struct strbuf *boundary = xmalloc(sizeof(struct strbuf)); + strbuf_init(boundary, line->len); + + if (!strcasestr(line->buf, "text/")) + message_type = TYPE_OTHER; + if (slurp_attr(line->buf, "boundary=", boundary)) { + strbuf_insert(boundary, 0, "--", 2); + if (++content_top > &content[MAX_BOUNDARIES]) { + fprintf(stderr, "Too many boundaries to handle\n"); + exit(1); + } + *content_top = boundary; + boundary = NULL; + } + slurp_attr(line->buf, "charset=", &charset); + + if (boundary) { + strbuf_release(boundary); + free(boundary); + } +} + +static void handle_content_transfer_encoding(const struct strbuf *line) +{ + if (strcasestr(line->buf, "base64")) + transfer_encoding = TE_BASE64; + else if (strcasestr(line->buf, "quoted-printable")) + transfer_encoding = TE_QP; + else + transfer_encoding = TE_DONTCARE; +} + +static int is_multipart_boundary(const struct strbuf *line) +{ + return (((*content_top)->len <= line->len) && + !memcmp(line->buf, (*content_top)->buf, (*content_top)->len)); +} + +static void cleanup_subject(struct strbuf *subject) +{ + size_t at = 0; + + while (at < subject->len) { + char *pos; + size_t remove; + + switch (subject->buf[at]) { + case 'r': case 'R': + if (subject->len <= at + 3) + break; + if (!memcmp(subject->buf + at + 1, "e:", 2)) { + strbuf_remove(subject, at, 3); + continue; + } + at++; + break; + case ' ': case '\t': case ':': + strbuf_remove(subject, at, 1); + continue; + case '[': + pos = strchr(subject->buf + at, ']'); + if (!pos) + break; + remove = pos - subject->buf + at + 1; + if (!keep_non_patch_brackets_in_subject || + (7 <= remove && + memmem(subject->buf + at, remove, "PATCH", 5))) + strbuf_remove(subject, at, remove); + else + at += remove; + continue; + } + break; + } + strbuf_trim(subject); +} + +static void cleanup_space(struct strbuf *sb) +{ + size_t pos, cnt; + for (pos = 0; pos < sb->len; pos++) { + if (isspace(sb->buf[pos])) { + sb->buf[pos] = ' '; + for (cnt = 0; isspace(sb->buf[pos + cnt + 1]); cnt++); + strbuf_remove(sb, pos + 1, cnt); + } + } +} + +static void decode_header(struct strbuf *line); +static const char *header[MAX_HDR_PARSED] = { + "From","Subject","Date", +}; + +static inline int cmp_header(const struct strbuf *line, const char *hdr) +{ + int len = strlen(hdr); + return !strncasecmp(line->buf, hdr, len) && line->len > len && + line->buf[len] == ':' && isspace(line->buf[len + 1]); +} + +static int check_header(const struct strbuf *line, + struct strbuf *hdr_data[], int overwrite) +{ + int i, ret = 0, len; + struct strbuf sb = STRBUF_INIT; + /* search for the interesting parts */ + for (i = 0; header[i]; i++) { + int len = strlen(header[i]); + if ((!hdr_data[i] || overwrite) && cmp_header(line, header[i])) { + /* Unwrap inline B and Q encoding, and optionally + * normalize the meta information to utf8. + */ + strbuf_add(&sb, line->buf + len + 2, line->len - len - 2); + decode_header(&sb); + handle_header(&hdr_data[i], &sb); + ret = 1; + goto check_header_out; + } + } + + /* Content stuff */ + if (cmp_header(line, "Content-Type")) { + len = strlen("Content-Type: "); + strbuf_add(&sb, line->buf + len, line->len - len); + decode_header(&sb); + strbuf_insert(&sb, 0, "Content-Type: ", len); + handle_content_type(&sb); + ret = 1; + goto check_header_out; + } + if (cmp_header(line, "Content-Transfer-Encoding")) { + len = strlen("Content-Transfer-Encoding: "); + strbuf_add(&sb, line->buf + len, line->len - len); + decode_header(&sb); + handle_content_transfer_encoding(&sb); + ret = 1; + goto check_header_out; + } + + /* for inbody stuff */ + if (!prefixcmp(line->buf, ">From") && isspace(line->buf[5])) { + ret = 1; /* Should this return 0? */ + goto check_header_out; + } + if (!prefixcmp(line->buf, "[PATCH]") && isspace(line->buf[7])) { + for (i = 0; header[i]; i++) { + if (!memcmp("Subject", header[i], 7)) { + handle_header(&hdr_data[i], line); + ret = 1; + goto check_header_out; + } + } + } + +check_header_out: + strbuf_release(&sb); + return ret; +} + +static int is_rfc2822_header(const struct strbuf *line) +{ + /* + * The section that defines the loosest possible + * field name is "3.6.8 Optional fields". + * + * optional-field = field-name ":" unstructured CRLF + * field-name = 1*ftext + * ftext = %d33-57 / %59-126 + */ + int ch; + char *cp = line->buf; + + /* Count mbox From headers as headers */ + if (!prefixcmp(cp, "From ") || !prefixcmp(cp, ">From ")) + return 1; + + while ((ch = *cp++)) { + if (ch == ':') + return 1; + if ((33 <= ch && ch <= 57) || + (59 <= ch && ch <= 126)) + continue; + break; + } + return 0; +} + +static int read_one_header_line(struct strbuf *line, FILE *in) +{ + /* Get the first part of the line. */ + if (strbuf_getline(line, in, '\n')) + return 0; + + /* + * Is it an empty line or not a valid rfc2822 header? + * If so, stop here, and return false ("not a header") + */ + strbuf_rtrim(line); + if (!line->len || !is_rfc2822_header(line)) { + /* Re-add the newline */ + strbuf_addch(line, '\n'); + return 0; + } + + /* + * Now we need to eat all the continuation lines.. + * Yuck, 2822 header "folding" + */ + for (;;) { + int peek; + struct strbuf continuation = STRBUF_INIT; + + peek = fgetc(in); ungetc(peek, in); + if (peek != ' ' && peek != '\t') + break; + if (strbuf_getline(&continuation, in, '\n')) + break; + continuation.buf[0] = '\n'; + strbuf_rtrim(&continuation); + strbuf_addbuf(line, &continuation); + } + + return 1; +} + +static struct strbuf *decode_q_segment(const struct strbuf *q_seg, int rfc2047) +{ + const char *in = q_seg->buf; + int c; + struct strbuf *out = xmalloc(sizeof(struct strbuf)); + strbuf_init(out, q_seg->len); + + while ((c = *in++) != 0) { + if (c == '=') { + int d = *in++; + if (d == '\n' || !d) + break; /* drop trailing newline */ + strbuf_addch(out, (hexval(d) << 4) | hexval(*in++)); + continue; + } + if (rfc2047 && c == '_') /* rfc2047 4.2 (2) */ + c = 0x20; + strbuf_addch(out, c); + } + return out; +} + +static struct strbuf *decode_b_segment(const struct strbuf *b_seg) +{ + /* Decode in..ep, possibly in-place to ot */ + int c, pos = 0, acc = 0; + const char *in = b_seg->buf; + struct strbuf *out = xmalloc(sizeof(struct strbuf)); + strbuf_init(out, b_seg->len); + + while ((c = *in++) != 0) { + if (c == '+') + c = 62; + else if (c == '/') + c = 63; + else if ('A' <= c && c <= 'Z') + c -= 'A'; + else if ('a' <= c && c <= 'z') + c -= 'a' - 26; + else if ('0' <= c && c <= '9') + c -= '0' - 52; + else + continue; /* garbage */ + switch (pos++) { + case 0: + acc = (c << 2); + break; + case 1: + strbuf_addch(out, (acc | (c >> 4))); + acc = (c & 15) << 4; + break; + case 2: + strbuf_addch(out, (acc | (c >> 2))); + acc = (c & 3) << 6; + break; + case 3: + strbuf_addch(out, (acc | c)); + acc = pos = 0; + break; + } + } + return out; +} + +/* + * When there is no known charset, guess. + * + * Right now we assume that if the target is UTF-8 (the default), + * and it already looks like UTF-8 (which includes US-ASCII as its + * subset, of course) then that is what it is and there is nothing + * to do. + * + * Otherwise, we default to assuming it is Latin1 for historical + * reasons. + */ +static const char *guess_charset(const struct strbuf *line, const char *target_charset) +{ + if (is_encoding_utf8(target_charset)) { + if (is_utf8(line->buf)) + return NULL; + } + return "ISO8859-1"; +} + +static void convert_to_utf8(struct strbuf *line, const char *charset) +{ + char *out; + + if (!charset || !*charset) { + charset = guess_charset(line, metainfo_charset); + if (!charset) + return; + } + + if (!strcasecmp(metainfo_charset, charset)) + return; + out = reencode_string(line->buf, metainfo_charset, charset); + if (!out) + die("cannot convert from %s to %s", + charset, metainfo_charset); + strbuf_attach(line, out, strlen(out), strlen(out)); +} + +static int decode_header_bq(struct strbuf *it) +{ + char *in, *ep, *cp; + struct strbuf outbuf = STRBUF_INIT, *dec; + struct strbuf charset_q = STRBUF_INIT, piecebuf = STRBUF_INIT; + int rfc2047 = 0; + + in = it->buf; + while (in - it->buf <= it->len && (ep = strstr(in, "=?")) != NULL) { + int encoding; + strbuf_reset(&charset_q); + strbuf_reset(&piecebuf); + rfc2047 = 1; + + if (in != ep) { + /* + * We are about to process an encoded-word + * that begins at ep, but there is something + * before the encoded word. + */ + char *scan; + for (scan = in; scan < ep; scan++) + if (!isspace(*scan)) + break; + + if (scan != ep || in == it->buf) { + /* + * We should not lose that "something", + * unless we have just processed an + * encoded-word, and there is only LWS + * before the one we are about to process. + */ + strbuf_add(&outbuf, in, ep - in); + } + } + /* E.g. + * ep : "=?iso-2022-jp?B?GyR...?= foo" + * ep : "=?ISO-8859-1?Q?Foo=FCbar?= baz" + */ + ep += 2; + + if (ep - it->buf >= it->len || !(cp = strchr(ep, '?'))) + goto decode_header_bq_out; + + if (cp + 3 - it->buf > it->len) + goto decode_header_bq_out; + strbuf_add(&charset_q, ep, cp - ep); + + encoding = cp[1]; + if (!encoding || cp[2] != '?') + goto decode_header_bq_out; + ep = strstr(cp + 3, "?="); + if (!ep) + goto decode_header_bq_out; + strbuf_add(&piecebuf, cp + 3, ep - cp - 3); + switch (tolower(encoding)) { + default: + goto decode_header_bq_out; + case 'b': + dec = decode_b_segment(&piecebuf); + break; + case 'q': + dec = decode_q_segment(&piecebuf, 1); + break; + } + if (metainfo_charset) + convert_to_utf8(dec, charset_q.buf); + + strbuf_addbuf(&outbuf, dec); + strbuf_release(dec); + free(dec); + in = ep + 2; + } + strbuf_addstr(&outbuf, in); + strbuf_reset(it); + strbuf_addbuf(it, &outbuf); +decode_header_bq_out: + strbuf_release(&outbuf); + strbuf_release(&charset_q); + strbuf_release(&piecebuf); + return rfc2047; +} + +static void decode_header(struct strbuf *it) +{ + if (decode_header_bq(it)) + return; + /* otherwise "it" is a straight copy of the input. + * This can be binary guck but there is no charset specified. + */ + if (metainfo_charset) + convert_to_utf8(it, ""); +} + +static void decode_transfer_encoding(struct strbuf *line) +{ + struct strbuf *ret; + + switch (transfer_encoding) { + case TE_QP: + ret = decode_q_segment(line, 0); + break; + case TE_BASE64: + ret = decode_b_segment(line); + break; + case TE_DONTCARE: + default: + return; + } + strbuf_reset(line); + strbuf_addbuf(line, ret); + strbuf_release(ret); + free(ret); +} + +static void handle_filter(struct strbuf *line); + +static int find_boundary(void) +{ + while (!strbuf_getline(&line, fin, '\n')) { + if (*content_top && is_multipart_boundary(&line)) + return 1; + } + return 0; +} + +static int handle_boundary(void) +{ + struct strbuf newline = STRBUF_INIT; + + strbuf_addch(&newline, '\n'); +again: + if (line.len >= (*content_top)->len + 2 && + !memcmp(line.buf + (*content_top)->len, "--", 2)) { + /* we hit an end boundary */ + /* pop the current boundary off the stack */ + strbuf_release(*content_top); + free(*content_top); + *content_top = NULL; + + /* technically won't happen as is_multipart_boundary() + will fail first. But just in case.. + */ + if (--content_top < content) { + fprintf(stderr, "Detected mismatched boundaries, " + "can't recover\n"); + exit(1); + } + handle_filter(&newline); + strbuf_release(&newline); + + /* skip to the next boundary */ + if (!find_boundary()) + return 0; + goto again; + } + + /* set some defaults */ + transfer_encoding = TE_DONTCARE; + strbuf_reset(&charset); + message_type = TYPE_TEXT; + + /* slurp in this section's info */ + while (read_one_header_line(&line, fin)) + check_header(&line, p_hdr_data, 0); + + strbuf_release(&newline); + /* replenish line */ + if (strbuf_getline(&line, fin, '\n')) + return 0; + strbuf_addch(&line, '\n'); + return 1; +} + +static inline int patchbreak(const struct strbuf *line) +{ + size_t i; + + /* Beginning of a "diff -" header? */ + if (!prefixcmp(line->buf, "diff -")) + return 1; + + /* CVS "Index: " line? */ + if (!prefixcmp(line->buf, "Index: ")) + return 1; + + /* + * "--- <filename>" starts patches without headers + * "---<sp>*" is a manual separator + */ + if (line->len < 4) + return 0; + + if (!prefixcmp(line->buf, "---")) { + /* space followed by a filename? */ + if (line->buf[3] == ' ' && !isspace(line->buf[4])) + return 1; + /* Just whitespace? */ + for (i = 3; i < line->len; i++) { + unsigned char c = line->buf[i]; + if (c == '\n') + return 1; + if (!isspace(c)) + break; + } + return 0; + } + return 0; +} + +static int is_scissors_line(const struct strbuf *line) +{ + size_t i, len = line->len; + int scissors = 0, gap = 0; + int first_nonblank = -1; + int last_nonblank = 0, visible, perforation = 0, in_perforation = 0; + const char *buf = line->buf; + + for (i = 0; i < len; i++) { + if (isspace(buf[i])) { + if (in_perforation) { + perforation++; + gap++; + } + continue; + } + last_nonblank = i; + if (first_nonblank < 0) + first_nonblank = i; + if (buf[i] == '-') { + in_perforation = 1; + perforation++; + continue; + } + if (i + 1 < len && + (!memcmp(buf + i, ">8", 2) || !memcmp(buf + i, "8<", 2))) { + in_perforation = 1; + perforation += 2; + scissors += 2; + i++; + continue; + } + in_perforation = 0; + } + + /* + * The mark must be at least 8 bytes long (e.g. "-- >8 --"). + * Even though there can be arbitrary cruft on the same line + * (e.g. "cut here"), in order to avoid misidentification, the + * perforation must occupy more than a third of the visible + * width of the line, and dashes and scissors must occupy more + * than half of the perforation. + */ + + visible = last_nonblank - first_nonblank + 1; + return (scissors && 8 <= visible && + visible < perforation * 3 && + gap * 2 < perforation); +} + +static int handle_commit_msg(struct strbuf *line) +{ + static int still_looking = 1; + + if (!cmitmsg) + return 0; + + if (still_looking) { + strbuf_ltrim(line); + if (!line->len) + return 0; + } + + if (use_inbody_headers && still_looking) { + still_looking = check_header(line, s_hdr_data, 0); + if (still_looking) + return 0; + } else + /* Only trim the first (blank) line of the commit message + * when ignoring in-body headers. + */ + still_looking = 0; + + /* normalize the log message to UTF-8. */ + if (metainfo_charset) + convert_to_utf8(line, charset.buf); + + if (use_scissors && is_scissors_line(line)) { + int i; + if (fseek(cmitmsg, 0L, SEEK_SET)) + die_errno("Could not rewind output message file"); + if (ftruncate(fileno(cmitmsg), 0)) + die_errno("Could not truncate output message file at scissors"); + still_looking = 1; + + /* + * We may have already read "secondary headers"; purge + * them to give ourselves a clean restart. + */ + for (i = 0; header[i]; i++) { + if (s_hdr_data[i]) + strbuf_release(s_hdr_data[i]); + s_hdr_data[i] = NULL; + } + return 0; + } + + if (patchbreak(line)) { + fclose(cmitmsg); + cmitmsg = NULL; + return 1; + } + + fputs(line->buf, cmitmsg); + return 0; +} + +static void handle_patch(const struct strbuf *line) +{ + fwrite(line->buf, 1, line->len, patchfile); + patch_lines++; +} + +static void handle_filter(struct strbuf *line) +{ + static int filter = 0; + + /* filter tells us which part we left off on */ + switch (filter) { + case 0: + if (!handle_commit_msg(line)) + break; + filter++; + case 1: + handle_patch(line); + break; + } +} + +static void handle_body(void) +{ + struct strbuf prev = STRBUF_INIT; + + /* Skip up to the first boundary */ + if (*content_top) { + if (!find_boundary()) + goto handle_body_out; + } + + do { + /* process any boundary lines */ + if (*content_top && is_multipart_boundary(&line)) { + /* flush any leftover */ + if (prev.len) { + handle_filter(&prev); + strbuf_reset(&prev); + } + if (!handle_boundary()) + goto handle_body_out; + } + + /* Unwrap transfer encoding */ + decode_transfer_encoding(&line); + + switch (transfer_encoding) { + case TE_BASE64: + case TE_QP: + { + struct strbuf **lines, **it, *sb; + + /* Prepend any previous partial lines */ + strbuf_insert(&line, 0, prev.buf, prev.len); + strbuf_reset(&prev); + + /* binary data most likely doesn't have newlines */ + if (message_type != TYPE_TEXT) { + handle_filter(&line); + break; + } + /* + * This is a decoded line that may contain + * multiple new lines. Pass only one chunk + * at a time to handle_filter() + */ + lines = strbuf_split(&line, '\n'); + for (it = lines; (sb = *it); it++) { + if (*(it + 1) == NULL) /* The last line */ + if (sb->buf[sb->len - 1] != '\n') { + /* Partial line, save it for later. */ + strbuf_addbuf(&prev, sb); + break; + } + handle_filter(sb); + } + /* + * The partial chunk is saved in "prev" and will be + * appended by the next iteration of read_line_with_nul(). + */ + strbuf_list_free(lines); + break; + } + default: + handle_filter(&line); + } + + } while (!strbuf_getwholeline(&line, fin, '\n')); + +handle_body_out: + strbuf_release(&prev); +} + +static void output_header_lines(FILE *fout, const char *hdr, const struct strbuf *data) +{ + const char *sp = data->buf; + while (1) { + char *ep = strchr(sp, '\n'); + int len; + if (!ep) + len = strlen(sp); + else + len = ep - sp; + fprintf(fout, "%s: %.*s\n", hdr, len, sp); + if (!ep) + break; + sp = ep + 1; + } +} + +static void handle_info(void) +{ + struct strbuf *hdr; + int i; + + for (i = 0; header[i]; i++) { + /* only print inbody headers if we output a patch file */ + if (patch_lines && s_hdr_data[i]) + hdr = s_hdr_data[i]; + else if (p_hdr_data[i]) + hdr = p_hdr_data[i]; + else + continue; + + if (!memcmp(header[i], "Subject", 7)) { + if (!keep_subject) { + cleanup_subject(hdr); + cleanup_space(hdr); + } + output_header_lines(fout, "Subject", hdr); + } else if (!memcmp(header[i], "From", 4)) { + cleanup_space(hdr); + handle_from(hdr); + fprintf(fout, "Author: %s\n", name.buf); + fprintf(fout, "Email: %s\n", email.buf); + } else { + cleanup_space(hdr); + fprintf(fout, "%s: %s\n", header[i], hdr->buf); + } + } + fprintf(fout, "\n"); +} + +static int mailinfo(FILE *in, FILE *out, const char *msg, const char *patch) +{ + int peek; + fin = in; + fout = out; + + cmitmsg = fopen(msg, "w"); + if (!cmitmsg) { + perror(msg); + return -1; + } + patchfile = fopen(patch, "w"); + if (!patchfile) { + perror(patch); + fclose(cmitmsg); + return -1; + } + + p_hdr_data = xcalloc(MAX_HDR_PARSED, sizeof(*p_hdr_data)); + s_hdr_data = xcalloc(MAX_HDR_PARSED, sizeof(*s_hdr_data)); + + do { + peek = fgetc(in); + } while (isspace(peek)); + ungetc(peek, in); + + /* process the email header */ + while (read_one_header_line(&line, fin)) + check_header(&line, p_hdr_data, 1); + + handle_body(); + handle_info(); + + return 0; +} + +static int git_mailinfo_config(const char *var, const char *value, void *unused) +{ + if (prefixcmp(var, "mailinfo.")) + return git_default_config(var, value, unused); + if (!strcmp(var, "mailinfo.scissors")) { + use_scissors = git_config_bool(var, value); + return 0; + } + /* perhaps others here */ + return 0; +} + +static const char mailinfo_usage[] = + "git mailinfo [-k|-b] [-u | --encoding=<encoding> | -n] [--scissors | --no-scissors] msg patch < mail >info"; + +int cmd_mailinfo(int argc, const char **argv, const char *prefix) +{ + const char *def_charset; + + /* NEEDSWORK: might want to do the optional .git/ directory + * discovery + */ + git_config(git_mailinfo_config, NULL); + + def_charset = (git_commit_encoding ? git_commit_encoding : "UTF-8"); + metainfo_charset = def_charset; + + while (1 < argc && argv[1][0] == '-') { + if (!strcmp(argv[1], "-k")) + keep_subject = 1; + else if (!strcmp(argv[1], "-b")) + keep_non_patch_brackets_in_subject = 1; + else if (!strcmp(argv[1], "-u")) + metainfo_charset = def_charset; + else if (!strcmp(argv[1], "-n")) + metainfo_charset = NULL; + else if (!prefixcmp(argv[1], "--encoding=")) + metainfo_charset = argv[1] + 11; + else if (!strcmp(argv[1], "--scissors")) + use_scissors = 1; + else if (!strcmp(argv[1], "--no-scissors")) + use_scissors = 0; + else if (!strcmp(argv[1], "--no-inbody-headers")) + use_inbody_headers = 0; + else + usage(mailinfo_usage); + argc--; argv++; + } + + if (argc != 3) + usage(mailinfo_usage); + + return !!mailinfo(stdin, stdout, argv[1], argv[2]); +} |