From 34488e3c375d159506d5d98e012f3b36e7cd9fe7 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Lukas=20Sandstr=C3=B6m?= Date: Tue, 13 Jun 2006 22:21:50 +0200 Subject: Make git-mailinfo a builtin MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit [jc: with a bit of constness tightening] Signed-off-by: Lukas Sandström Signed-off-by: Junio C Hamano --- mailinfo.c | 831 ------------------------------------------------------------- 1 file changed, 831 deletions(-) delete mode 100644 mailinfo.c (limited to 'mailinfo.c') diff --git a/mailinfo.c b/mailinfo.c deleted file mode 100644 index d9b74f30d..000000000 --- a/mailinfo.c +++ /dev/null @@ -1,831 +0,0 @@ -/* - * Another stupid program, this one parsing the headers of an - * email to figure out authorship and subject - */ -#define _GNU_SOURCE -#include -#include -#include -#include -#ifndef NO_ICONV -#include -#endif -#include "git-compat-util.h" -#include "cache.h" - -static FILE *cmitmsg, *patchfile; - -static int keep_subject = 0; -static char *metainfo_charset = NULL; -static char line[1000]; -static char date[1000]; -static char name[1000]; -static char email[1000]; -static char subject[1000]; - -static enum { - TE_DONTCARE, TE_QP, TE_BASE64, -} transfer_encoding; -static char charset[256]; - -static char multipart_boundary[1000]; -static int multipart_boundary_len; -static int patch_lines = 0; - -static char *sanity_check(char *name, char *email) -{ - int len = strlen(name); - if (len < 3 || len > 60) - return email; - if (strchr(name, '@') || strchr(name, '<') || strchr(name, '>')) - return email; - return name; -} - -static int bogus_from(char *line) -{ - /* John Doe */ - char *bra, *ket, *dst, *cp; - - /* This is fallback, so do not bother if we already have an - * e-mail address. - */ - if (*email) - return 0; - - bra = strchr(line, '<'); - if (!bra) - return 0; - ket = strchr(bra, '>'); - if (!ket) - return 0; - - for (dst = email, cp = bra+1; cp < ket; ) - *dst++ = *cp++; - *dst = 0; - for (cp = line; isspace(*cp); cp++) - ; - for (bra--; isspace(*bra); bra--) - *bra = 0; - cp = sanity_check(cp, email); - strcpy(name, cp); - return 1; -} - -static int handle_from(char *in_line) -{ - char line[1000]; - char *at; - char *dst; - - strcpy(line, in_line); - at = strchr(line, '@'); - if (!at) - return bogus_from(line); - - /* - * If we already have one email, don't take any confusing lines - */ - if (*email && strchr(at+1, '@')) - return 0; - - /* Pick up the string around '@', possibly delimited with <> - * pair; that is the email part. White them out while copying. - */ - while (at > line) { - char c = at[-1]; - if (isspace(c)) - break; - if (c == '<') { - at[-1] = ' '; - break; - } - at--; - } - dst = email; - for (;;) { - unsigned char c = *at; - if (!c || c == '>' || isspace(c)) { - if (c == '>') - *at = ' '; - break; - } - *at++ = ' '; - *dst++ = c; - } - *dst++ = 0; - - /* The remainder is name. It could be "John Doe " - * or "john.doe@xz (John Doe)", but we have whited out the - * email part, so trim from both ends, possibly removing - * the () pair at the end. - */ - at = line + strlen(line); - while (at > line) { - unsigned char c = *--at; - if (!isspace(c)) { - at[(c == ')') ? 0 : 1] = 0; - break; - } - } - - at = line; - for (;;) { - unsigned char c = *at; - if (!c || !isspace(c)) { - if (c == '(') - at++; - break; - } - at++; - } - at = sanity_check(at, email); - strcpy(name, at); - return 1; -} - -static int handle_date(char *line) -{ - strcpy(date, line); - return 0; -} - -static int handle_subject(char *line) -{ - strcpy(subject, line); - return 0; -} - -/* 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, char *attr) -{ - char *ends, *ap = strcasestr(line, name); - size_t sz; - - if (!ap) { - *attr = 0; - return 0; - } - ap += strlen(name); - if (*ap == '"') { - ap++; - ends = "\""; - } - else - ends = "; \t"; - sz = strcspn(ap, ends); - memcpy(attr, ap, sz); - attr[sz] = 0; - return 1; -} - -static int handle_subcontent_type(char *line) -{ - /* We do not want to mess with boundary. Note that we do not - * handle nested multipart. - */ - if (strcasestr(line, "boundary=")) { - fprintf(stderr, "Not handling nested multipart message.\n"); - exit(1); - } - slurp_attr(line, "charset=", charset); - if (*charset) { - int i, c; - for (i = 0; (c = charset[i]) != 0; i++) - charset[i] = tolower(c); - } - return 0; -} - -static int handle_content_type(char *line) -{ - *multipart_boundary = 0; - if (slurp_attr(line, "boundary=", multipart_boundary + 2)) { - memcpy(multipart_boundary, "--", 2); - multipart_boundary_len = strlen(multipart_boundary); - } - slurp_attr(line, "charset=", charset); - return 0; -} - -static int handle_content_transfer_encoding(char *line) -{ - if (strcasestr(line, "base64")) - transfer_encoding = TE_BASE64; - else if (strcasestr(line, "quoted-printable")) - transfer_encoding = TE_QP; - else - transfer_encoding = TE_DONTCARE; - return 0; -} - -static int is_multipart_boundary(const char *line) -{ - return (!memcmp(line, multipart_boundary, multipart_boundary_len)); -} - -static int eatspace(char *line) -{ - int len = strlen(line); - while (len > 0 && isspace(line[len-1])) - line[--len] = 0; - return len; -} - -#define SEEN_FROM 01 -#define SEEN_DATE 02 -#define SEEN_SUBJECT 04 -#define SEEN_BOGUS_UNIX_FROM 010 -#define SEEN_PREFIX 020 - -/* First lines of body can have From:, Date:, and Subject: or empty */ -static void handle_inbody_header(int *seen, char *line) -{ - if (*seen & SEEN_PREFIX) - return; - if (isspace(*line)) { - char *cp; - for (cp = line + 1; *cp; cp++) { - if (!isspace(*cp)) - break; - } - if (!*cp) - return; - } - if (!memcmp(">From", line, 5) && isspace(line[5])) { - if (!(*seen & SEEN_BOGUS_UNIX_FROM)) { - *seen |= SEEN_BOGUS_UNIX_FROM; - return; - } - } - if (!memcmp("From:", line, 5) && isspace(line[5])) { - if (!(*seen & SEEN_FROM) && handle_from(line+6)) { - *seen |= SEEN_FROM; - return; - } - } - if (!memcmp("Date:", line, 5) && isspace(line[5])) { - if (!(*seen & SEEN_DATE)) { - handle_date(line+6); - *seen |= SEEN_DATE; - return; - } - } - if (!memcmp("Subject:", line, 8) && isspace(line[8])) { - if (!(*seen & SEEN_SUBJECT)) { - handle_subject(line+9); - *seen |= SEEN_SUBJECT; - return; - } - } - if (!memcmp("[PATCH]", line, 7) && isspace(line[7])) { - if (!(*seen & SEEN_SUBJECT)) { - handle_subject(line); - *seen |= SEEN_SUBJECT; - return; - } - } - *seen |= SEEN_PREFIX; -} - -static char *cleanup_subject(char *subject) -{ - if (keep_subject) - return subject; - for (;;) { - char *p; - int len, remove; - switch (*subject) { - case 'r': case 'R': - if (!memcmp("e:", subject+1, 2)) { - subject +=3; - continue; - } - break; - case ' ': case '\t': case ':': - subject++; - continue; - - case '[': - p = strchr(subject, ']'); - if (!p) { - subject++; - continue; - } - len = strlen(p); - remove = p - subject; - if (remove <= len *2) { - subject = p+1; - continue; - } - break; - } - eatspace(subject); - return subject; - } -} - -static void cleanup_space(char *buf) -{ - unsigned char c; - while ((c = *buf) != 0) { - buf++; - if (isspace(c)) { - buf[-1] = ' '; - c = *buf; - while (isspace(c)) { - int len = strlen(buf); - memmove(buf, buf+1, len); - c = *buf; - } - } - } -} - -static void decode_header_bq(char *it); -typedef int (*header_fn_t)(char *); -struct header_def { - const char *name; - header_fn_t func; - int namelen; -}; - -static void check_header(char *line, struct header_def *header) -{ - int i; - - if (header[0].namelen <= 0) { - for (i = 0; header[i].name; i++) - header[i].namelen = strlen(header[i].name); - } - for (i = 0; header[i].name; i++) { - int len = header[i].namelen; - if (!strncasecmp(line, header[i].name, len) && - line[len] == ':' && isspace(line[len + 1])) { - /* Unwrap inline B and Q encoding, and optionally - * normalize the meta information to utf8. - */ - decode_header_bq(line + len + 2); - header[i].func(line + len + 2); - break; - } - } -} - -static void check_subheader_line(char *line) -{ - static struct header_def header[] = { - { "Content-Type", handle_subcontent_type }, - { "Content-Transfer-Encoding", - handle_content_transfer_encoding }, - { NULL }, - }; - check_header(line, header); -} -static void check_header_line(char *line) -{ - static struct header_def header[] = { - { "From", handle_from }, - { "Date", handle_date }, - { "Subject", handle_subject }, - { "Content-Type", handle_content_type }, - { "Content-Transfer-Encoding", - handle_content_transfer_encoding }, - { NULL }, - }; - check_header(line, header); -} - -static int is_rfc2822_header(char *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; - while ((ch = *cp++)) { - if (ch == ':') - return cp != line; - if ((33 <= ch && ch <= 57) || - (59 <= ch && ch <= 126)) - continue; - break; - } - return 0; -} - -static int read_one_header_line(char *line, int sz, FILE *in) -{ - int ofs = 0; - while (ofs < sz) { - int peek, len; - if (fgets(line + ofs, sz - ofs, in) == NULL) - break; - len = eatspace(line + ofs); - if ((len == 0) || !is_rfc2822_header(line)) { - /* Re-add the newline */ - line[ofs + len] = '\n'; - line[ofs + len + 1] = '\0'; - break; - } - ofs += len; - /* Yuck, 2822 header "folding" */ - peek = fgetc(in); ungetc(peek, in); - if (peek != ' ' && peek != '\t') - break; - } - /* Count mbox From headers as headers */ - if (!ofs && !memcmp(line, "From ", 5)) - ofs = 1; - return ofs; -} - -static unsigned hexval(int c) -{ - if (c >= '0' && c <= '9') - return c - '0'; - if (c >= 'a' && c <= 'f') - return c - 'a' + 10; - if (c >= 'A' && c <= 'F') - return c - 'A' + 10; - return ~0; -} - -static int decode_q_segment(char *in, char *ot, char *ep, int rfc2047) -{ - int c; - while ((c = *in++) != 0 && (in <= ep)) { - if (c == '=') { - int d = *in++; - if (d == '\n' || !d) - break; /* drop trailing newline */ - *ot++ = ((hexval(d) << 4) | hexval(*in++)); - continue; - } - if (rfc2047 && c == '_') /* rfc2047 4.2 (2) */ - c = 0x20; - *ot++ = c; - } - *ot = 0; - return 0; -} - -static int decode_b_segment(char *in, char *ot, char *ep) -{ - /* Decode in..ep, possibly in-place to ot */ - int c, pos = 0, acc = 0; - - while ((c = *in++) != 0 && (in <= ep)) { - 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 if (c == '=') { - /* padding is almost like (c == 0), except we do - * not output NUL resulting only from it; - * for now we just trust the data. - */ - c = 0; - } - else - continue; /* garbage */ - switch (pos++) { - case 0: - acc = (c << 2); - break; - case 1: - *ot++ = (acc | (c >> 4)); - acc = (c & 15) << 4; - break; - case 2: - *ot++ = (acc | (c >> 2)); - acc = (c & 3) << 6; - break; - case 3: - *ot++ = (acc | c); - acc = pos = 0; - break; - } - } - *ot = 0; - return 0; -} - -static void convert_to_utf8(char *line, char *charset) -{ -#ifndef NO_ICONV - char *in, *out; - size_t insize, outsize, nrc; - char outbuf[4096]; /* cheat */ - static char latin_one[] = "latin1"; - char *input_charset = *charset ? charset : latin_one; - iconv_t conv = iconv_open(metainfo_charset, input_charset); - - if (conv == (iconv_t) -1) { - static int warned_latin1_once = 0; - if (input_charset != latin_one) { - fprintf(stderr, "cannot convert from %s to %s\n", - input_charset, metainfo_charset); - *charset = 0; - } - else if (!warned_latin1_once) { - warned_latin1_once = 1; - fprintf(stderr, "tried to convert from %s to %s, " - "but your iconv does not work with it.\n", - input_charset, metainfo_charset); - } - return; - } - in = line; - insize = strlen(in); - out = outbuf; - outsize = sizeof(outbuf); - nrc = iconv(conv, &in, &insize, &out, &outsize); - iconv_close(conv); - if (nrc == (size_t) -1) - return; - *out = 0; - strcpy(line, outbuf); -#endif -} - -static void decode_header_bq(char *it) -{ - char *in, *out, *ep, *cp, *sp; - char outbuf[1000]; - - in = it; - out = outbuf; - while ((ep = strstr(in, "=?")) != NULL) { - int sz, encoding; - char charset_q[256], piecebuf[256]; - if (in != ep) { - sz = ep - in; - memcpy(out, in, sz); - out += sz; - in += sz; - } - /* E.g. - * ep : "=?iso-2022-jp?B?GyR...?= foo" - * ep : "=?ISO-8859-1?Q?Foo=FCbar?= baz" - */ - ep += 2; - cp = strchr(ep, '?'); - if (!cp) - return; /* no munging */ - for (sp = ep; sp < cp; sp++) - charset_q[sp - ep] = tolower(*sp); - charset_q[cp - ep] = 0; - encoding = cp[1]; - if (!encoding || cp[2] != '?') - return; /* no munging */ - ep = strstr(cp + 3, "?="); - if (!ep) - return; /* no munging */ - switch (tolower(encoding)) { - default: - return; /* no munging */ - case 'b': - sz = decode_b_segment(cp + 3, piecebuf, ep); - break; - case 'q': - sz = decode_q_segment(cp + 3, piecebuf, ep, 1); - break; - } - if (sz < 0) - return; - if (metainfo_charset) - convert_to_utf8(piecebuf, charset_q); - strcpy(out, piecebuf); - out += strlen(out); - in = ep + 2; - } - strcpy(out, in); - strcpy(it, outbuf); -} - -static void decode_transfer_encoding(char *line) -{ - char *ep; - - switch (transfer_encoding) { - case TE_QP: - ep = line + strlen(line); - decode_q_segment(line, line, ep, 0); - break; - case TE_BASE64: - ep = line + strlen(line); - decode_b_segment(line, line, ep); - break; - case TE_DONTCARE: - break; - } -} - -static void handle_info(void) -{ - char *sub; - - sub = cleanup_subject(subject); - cleanup_space(name); - cleanup_space(date); - cleanup_space(email); - cleanup_space(sub); - - printf("Author: %s\nEmail: %s\nSubject: %s\nDate: %s\n\n", - name, email, sub, date); -} - -/* We are inside message body and have read line[] already. - * Spit out the commit log. - */ -static int handle_commit_msg(int *seen) -{ - if (!cmitmsg) - return 0; - do { - if (!memcmp("diff -", line, 6) || - !memcmp("---", line, 3) || - !memcmp("Index: ", line, 7)) - break; - if ((multipart_boundary[0] && is_multipart_boundary(line))) { - /* We come here when the first part had only - * the commit message without any patch. We - * pretend we have not seen this line yet, and - * go back to the loop. - */ - return 1; - } - - /* Unwrap transfer encoding and optionally - * normalize the log message to UTF-8. - */ - decode_transfer_encoding(line); - if (metainfo_charset) - convert_to_utf8(line, charset); - - handle_inbody_header(seen, line); - if (!(*seen & SEEN_PREFIX)) - continue; - - fputs(line, cmitmsg); - } while (fgets(line, sizeof(line), stdin) != NULL); - fclose(cmitmsg); - cmitmsg = NULL; - return 0; -} - -/* We have done the commit message and have the first - * line of the patch in line[]. - */ -static void handle_patch(void) -{ - do { - if (multipart_boundary[0] && is_multipart_boundary(line)) - break; - /* Only unwrap transfer encoding but otherwise do not - * do anything. We do *NOT* want UTF-8 conversion - * here; we are dealing with the user payload. - */ - decode_transfer_encoding(line); - fputs(line, patchfile); - patch_lines++; - } while (fgets(line, sizeof(line), stdin) != NULL); -} - -/* multipart boundary and transfer encoding are set up for us, and we - * are at the end of the sub header. do equivalent of handle_body up - * to the next boundary without closing patchfile --- we will expect - * that the first part to contain commit message and a patch, and - * handle other parts as pure patches. - */ -static int handle_multipart_one_part(int *seen) -{ - int n = 0; - - while (fgets(line, sizeof(line), stdin) != NULL) { - again: - n++; - if (is_multipart_boundary(line)) - break; - if (handle_commit_msg(seen)) - goto again; - handle_patch(); - break; - } - if (n == 0) - return -1; - return 0; -} - -static void handle_multipart_body(void) -{ - int seen = 0; - int part_num = 0; - - /* Skip up to the first boundary */ - while (fgets(line, sizeof(line), stdin) != NULL) - if (is_multipart_boundary(line)) { - part_num = 1; - break; - } - if (!part_num) - return; - /* We are on boundary line. Start slurping the subhead. */ - while (1) { - int hdr = read_one_header_line(line, sizeof(line), stdin); - if (!hdr) { - if (handle_multipart_one_part(&seen) < 0) - return; - /* Reset per part headers */ - transfer_encoding = TE_DONTCARE; - charset[0] = 0; - } - else - check_subheader_line(line); - } - fclose(patchfile); - if (!patch_lines) { - fprintf(stderr, "No patch found\n"); - exit(1); - } -} - -/* Non multipart message */ -static void handle_body(void) -{ - int seen = 0; - - handle_commit_msg(&seen); - handle_patch(); - fclose(patchfile); - if (!patch_lines) { - fprintf(stderr, "No patch found\n"); - exit(1); - } -} - -static const char mailinfo_usage[] = - "git-mailinfo [-k] [-u | --encoding=] msg patch info"; - -int main(int argc, char **argv) -{ - /* NEEDSWORK: might want to do the optional .git/ directory - * discovery - */ - git_config(git_default_config); - - while (1 < argc && argv[1][0] == '-') { - if (!strcmp(argv[1], "-k")) - keep_subject = 1; - else if (!strcmp(argv[1], "-u")) - metainfo_charset = git_commit_encoding; - else if (!strncmp(argv[1], "--encoding=", 11)) - metainfo_charset = argv[1] + 11; - else - usage(mailinfo_usage); - argc--; argv++; - } - - if (argc != 3) - usage(mailinfo_usage); - cmitmsg = fopen(argv[1], "w"); - if (!cmitmsg) { - perror(argv[1]); - exit(1); - } - patchfile = fopen(argv[2], "w"); - if (!patchfile) { - perror(argv[2]); - exit(1); - } - while (1) { - int hdr = read_one_header_line(line, sizeof(line), stdin); - if (!hdr) { - if (multipart_boundary[0]) - handle_multipart_body(); - else - handle_body(); - handle_info(); - break; - } - check_header_line(line); - } - return 0; -} -- cgit v1.2.1