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3aa4d81f88
Add best-effort support for patches sent using format=flowed (RFC 3676).
Remove leading spaces ("unstuff"), remove soft line breaks (indicated
by space + newline), but leave the signature separator (dash dash space
newline) alone.
Warn in git am when encountering a format=flowed patch, because any
trailing spaces would most probably be lost, as the sending MUA is
encouraged to remove them when preparing the email.
Provide a test patch formatted by Mozilla Thunderbird 60 using its
default configuration. It reuses the contents of the file mailinfo.c
before and after this patch.
Signed-off-by: Rene Scharfe <l.s.r@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
1246 lines
28 KiB
C
1246 lines
28 KiB
C
#include "cache.h"
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#include "config.h"
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#include "utf8.h"
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#include "strbuf.h"
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#include "mailinfo.h"
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static void cleanup_space(struct strbuf *sb)
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{
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size_t pos, cnt;
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for (pos = 0; pos < sb->len; pos++) {
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if (isspace(sb->buf[pos])) {
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sb->buf[pos] = ' ';
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for (cnt = 0; isspace(sb->buf[pos + cnt + 1]); cnt++);
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strbuf_remove(sb, pos + 1, cnt);
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}
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}
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}
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static void get_sane_name(struct strbuf *out, struct strbuf *name, struct strbuf *email)
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{
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struct strbuf *src = name;
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if (name->len < 3 || 60 < name->len || strchr(name->buf, '@') ||
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strchr(name->buf, '<') || strchr(name->buf, '>'))
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src = email;
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else if (name == out)
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return;
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strbuf_reset(out);
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strbuf_addbuf(out, src);
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}
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static void parse_bogus_from(struct mailinfo *mi, const struct strbuf *line)
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{
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/* John Doe <johndoe> */
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char *bra, *ket;
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/* This is fallback, so do not bother if we already have an
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* e-mail address.
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*/
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if (mi->email.len)
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return;
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bra = strchr(line->buf, '<');
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if (!bra)
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return;
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ket = strchr(bra, '>');
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if (!ket)
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return;
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strbuf_reset(&mi->email);
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strbuf_add(&mi->email, bra + 1, ket - bra - 1);
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strbuf_reset(&mi->name);
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strbuf_add(&mi->name, line->buf, bra - line->buf);
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strbuf_trim(&mi->name);
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get_sane_name(&mi->name, &mi->name, &mi->email);
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}
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static const char *unquote_comment(struct strbuf *outbuf, const char *in)
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{
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int c;
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int take_next_literally = 0;
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strbuf_addch(outbuf, '(');
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while ((c = *in++) != 0) {
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if (take_next_literally == 1) {
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take_next_literally = 0;
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} else {
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switch (c) {
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case '\\':
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take_next_literally = 1;
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continue;
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case '(':
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in = unquote_comment(outbuf, in);
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continue;
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case ')':
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strbuf_addch(outbuf, ')');
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return in;
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}
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}
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strbuf_addch(outbuf, c);
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}
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return in;
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}
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static const char *unquote_quoted_string(struct strbuf *outbuf, const char *in)
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{
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int c;
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int take_next_literally = 0;
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while ((c = *in++) != 0) {
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if (take_next_literally == 1) {
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take_next_literally = 0;
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} else {
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switch (c) {
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case '\\':
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take_next_literally = 1;
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continue;
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case '"':
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return in;
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}
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}
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strbuf_addch(outbuf, c);
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}
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return in;
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}
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static void unquote_quoted_pair(struct strbuf *line)
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{
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struct strbuf outbuf;
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const char *in = line->buf;
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int c;
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strbuf_init(&outbuf, line->len);
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while ((c = *in++) != 0) {
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switch (c) {
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case '"':
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in = unquote_quoted_string(&outbuf, in);
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continue;
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case '(':
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in = unquote_comment(&outbuf, in);
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continue;
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}
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strbuf_addch(&outbuf, c);
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}
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strbuf_swap(&outbuf, line);
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strbuf_release(&outbuf);
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}
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static void handle_from(struct mailinfo *mi, const struct strbuf *from)
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{
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char *at;
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size_t el;
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struct strbuf f;
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strbuf_init(&f, from->len);
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strbuf_addbuf(&f, from);
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unquote_quoted_pair(&f);
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at = strchr(f.buf, '@');
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if (!at) {
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parse_bogus_from(mi, from);
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goto out;
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}
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/*
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* If we already have one email, don't take any confusing lines
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*/
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if (mi->email.len && strchr(at + 1, '@'))
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goto out;
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/* Pick up the string around '@', possibly delimited with <>
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* pair; that is the email part.
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*/
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while (at > f.buf) {
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char c = at[-1];
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if (isspace(c))
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break;
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if (c == '<') {
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at[-1] = ' ';
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break;
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}
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at--;
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}
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el = strcspn(at, " \n\t\r\v\f>");
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strbuf_reset(&mi->email);
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strbuf_add(&mi->email, at, el);
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strbuf_remove(&f, at - f.buf, el + (at[el] ? 1 : 0));
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/* The remainder is name. It could be
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*
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* - "John Doe <john.doe@xz>" (a), or
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* - "john.doe@xz (John Doe)" (b), or
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* - "John (zzz) Doe <john.doe@xz> (Comment)" (c)
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*
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* but we have removed the email part, so
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*
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* - remove extra spaces which could stay after email (case 'c'), and
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* - trim from both ends, possibly removing the () pair at the end
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* (cases 'a' and 'b').
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*/
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cleanup_space(&f);
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strbuf_trim(&f);
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if (f.buf[0] == '(' && f.len && f.buf[f.len - 1] == ')') {
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strbuf_remove(&f, 0, 1);
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strbuf_setlen(&f, f.len - 1);
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}
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get_sane_name(&mi->name, &f, &mi->email);
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out:
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strbuf_release(&f);
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}
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static void handle_header(struct strbuf **out, const struct strbuf *line)
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{
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if (!*out) {
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*out = xmalloc(sizeof(struct strbuf));
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strbuf_init(*out, line->len);
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} else
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strbuf_reset(*out);
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strbuf_addbuf(*out, line);
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}
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/* NOTE NOTE NOTE. We do not claim we do full MIME. We just attempt
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* to have enough heuristics to grok MIME encoded patches often found
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* on our mailing lists. For example, we do not even treat header lines
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* case insensitively.
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*/
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static int slurp_attr(const char *line, const char *name, struct strbuf *attr)
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{
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const char *ends, *ap = strcasestr(line, name);
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size_t sz;
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strbuf_setlen(attr, 0);
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if (!ap)
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return 0;
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ap += strlen(name);
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if (*ap == '"') {
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ap++;
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ends = "\"";
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}
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else
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ends = "; \t";
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sz = strcspn(ap, ends);
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strbuf_add(attr, ap, sz);
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return 1;
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}
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static int has_attr_value(const char *line, const char *name, const char *value)
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{
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struct strbuf sb = STRBUF_INIT;
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int rc = slurp_attr(line, name, &sb) && !strcasecmp(sb.buf, value);
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strbuf_release(&sb);
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return rc;
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}
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static void handle_content_type(struct mailinfo *mi, struct strbuf *line)
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{
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struct strbuf *boundary = xmalloc(sizeof(struct strbuf));
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strbuf_init(boundary, line->len);
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mi->format_flowed = has_attr_value(line->buf, "format=", "flowed");
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mi->delsp = has_attr_value(line->buf, "delsp=", "yes");
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if (slurp_attr(line->buf, "boundary=", boundary)) {
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strbuf_insert(boundary, 0, "--", 2);
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if (++mi->content_top >= &mi->content[MAX_BOUNDARIES]) {
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error("Too many boundaries to handle");
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mi->input_error = -1;
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mi->content_top = &mi->content[MAX_BOUNDARIES] - 1;
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return;
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}
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*(mi->content_top) = boundary;
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boundary = NULL;
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}
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slurp_attr(line->buf, "charset=", &mi->charset);
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if (boundary) {
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strbuf_release(boundary);
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free(boundary);
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}
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}
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static void handle_content_transfer_encoding(struct mailinfo *mi,
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const struct strbuf *line)
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{
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if (strcasestr(line->buf, "base64"))
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mi->transfer_encoding = TE_BASE64;
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else if (strcasestr(line->buf, "quoted-printable"))
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mi->transfer_encoding = TE_QP;
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else
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mi->transfer_encoding = TE_DONTCARE;
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}
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static int is_multipart_boundary(struct mailinfo *mi, const struct strbuf *line)
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{
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struct strbuf *content_top = *(mi->content_top);
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return ((content_top->len <= line->len) &&
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!memcmp(line->buf, content_top->buf, content_top->len));
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}
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static void cleanup_subject(struct mailinfo *mi, struct strbuf *subject)
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{
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size_t at = 0;
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while (at < subject->len) {
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char *pos;
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size_t remove;
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switch (subject->buf[at]) {
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case 'r': case 'R':
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if (subject->len <= at + 3)
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break;
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if ((subject->buf[at + 1] == 'e' ||
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subject->buf[at + 1] == 'E') &&
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subject->buf[at + 2] == ':') {
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strbuf_remove(subject, at, 3);
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continue;
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}
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at++;
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break;
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case ' ': case '\t': case ':':
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strbuf_remove(subject, at, 1);
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continue;
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case '[':
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pos = strchr(subject->buf + at, ']');
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if (!pos)
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break;
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remove = pos - subject->buf + at + 1;
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if (!mi->keep_non_patch_brackets_in_subject ||
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(7 <= remove &&
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memmem(subject->buf + at, remove, "PATCH", 5)))
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strbuf_remove(subject, at, remove);
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else {
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at += remove;
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/*
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* If the input had a space after the ], keep
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* it. We don't bother with finding the end of
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* the space, since we later normalize it
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* anyway.
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*/
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if (isspace(subject->buf[at]))
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at += 1;
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}
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continue;
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}
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break;
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}
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strbuf_trim(subject);
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}
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#define MAX_HDR_PARSED 10
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static const char *header[MAX_HDR_PARSED] = {
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"From","Subject","Date",
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};
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static inline int cmp_header(const struct strbuf *line, const char *hdr)
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{
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int len = strlen(hdr);
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return !strncasecmp(line->buf, hdr, len) && line->len > len &&
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line->buf[len] == ':' && isspace(line->buf[len + 1]);
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}
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static int is_format_patch_separator(const char *line, int len)
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{
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static const char SAMPLE[] =
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"From e6807f3efca28b30decfecb1732a56c7db1137ee Mon Sep 17 00:00:00 2001\n";
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const char *cp;
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if (len != strlen(SAMPLE))
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return 0;
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if (!skip_prefix(line, "From ", &cp))
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return 0;
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if (strspn(cp, "0123456789abcdef") != 40)
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return 0;
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cp += 40;
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return !memcmp(SAMPLE + (cp - line), cp, strlen(SAMPLE) - (cp - line));
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}
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static struct strbuf *decode_q_segment(const struct strbuf *q_seg, int rfc2047)
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{
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const char *in = q_seg->buf;
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int c;
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struct strbuf *out = xmalloc(sizeof(struct strbuf));
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strbuf_init(out, q_seg->len);
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while ((c = *in++) != 0) {
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if (c == '=') {
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int ch, d = *in;
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if (d == '\n' || !d)
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break; /* drop trailing newline */
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ch = hex2chr(in);
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if (ch >= 0) {
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strbuf_addch(out, ch);
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in += 2;
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continue;
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}
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/* garbage -- fall through */
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}
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if (rfc2047 && c == '_') /* rfc2047 4.2 (2) */
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c = 0x20;
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strbuf_addch(out, c);
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}
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return out;
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}
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static struct strbuf *decode_b_segment(const struct strbuf *b_seg)
|
|
{
|
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/* Decode in..ep, possibly in-place to ot */
|
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int c, pos = 0, acc = 0;
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const char *in = b_seg->buf;
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struct strbuf *out = xmalloc(sizeof(struct strbuf));
|
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strbuf_init(out, b_seg->len);
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while ((c = *in++) != 0) {
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if (c == '+')
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c = 62;
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else if (c == '/')
|
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c = 63;
|
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else if ('A' <= c && c <= 'Z')
|
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c -= 'A';
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else if ('a' <= c && c <= 'z')
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c -= 'a' - 26;
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else if ('0' <= c && c <= '9')
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c -= '0' - 52;
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else
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continue; /* garbage */
|
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switch (pos++) {
|
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case 0:
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acc = (c << 2);
|
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break;
|
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case 1:
|
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strbuf_addch(out, (acc | (c >> 4)));
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acc = (c & 15) << 4;
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break;
|
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case 2:
|
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strbuf_addch(out, (acc | (c >> 2)));
|
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acc = (c & 3) << 6;
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break;
|
|
case 3:
|
|
strbuf_addch(out, (acc | c));
|
|
acc = pos = 0;
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break;
|
|
}
|
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}
|
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return out;
|
|
}
|
|
|
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static int convert_to_utf8(struct mailinfo *mi,
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struct strbuf *line, const char *charset)
|
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{
|
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char *out;
|
|
|
|
if (!mi->metainfo_charset || !charset || !*charset)
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return 0;
|
|
|
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if (same_encoding(mi->metainfo_charset, charset))
|
|
return 0;
|
|
out = reencode_string(line->buf, mi->metainfo_charset, charset);
|
|
if (!out) {
|
|
mi->input_error = -1;
|
|
return error("cannot convert from %s to %s",
|
|
charset, mi->metainfo_charset);
|
|
}
|
|
strbuf_attach(line, out, strlen(out), strlen(out));
|
|
return 0;
|
|
}
|
|
|
|
static void decode_header(struct mailinfo *mi, struct strbuf *it)
|
|
{
|
|
char *in, *ep, *cp;
|
|
struct strbuf outbuf = STRBUF_INIT, *dec;
|
|
struct strbuf charset_q = STRBUF_INIT, piecebuf = STRBUF_INIT;
|
|
int found_error = 1; /* pessimism */
|
|
|
|
in = it->buf;
|
|
while (in - it->buf <= it->len && (ep = strstr(in, "=?")) != NULL) {
|
|
int encoding;
|
|
strbuf_reset(&charset_q);
|
|
strbuf_reset(&piecebuf);
|
|
|
|
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 release_return;
|
|
|
|
if (cp + 3 - it->buf > it->len)
|
|
goto release_return;
|
|
strbuf_add(&charset_q, ep, cp - ep);
|
|
|
|
encoding = cp[1];
|
|
if (!encoding || cp[2] != '?')
|
|
goto release_return;
|
|
ep = strstr(cp + 3, "?=");
|
|
if (!ep)
|
|
goto release_return;
|
|
strbuf_add(&piecebuf, cp + 3, ep - cp - 3);
|
|
switch (tolower(encoding)) {
|
|
default:
|
|
goto release_return;
|
|
case 'b':
|
|
dec = decode_b_segment(&piecebuf);
|
|
break;
|
|
case 'q':
|
|
dec = decode_q_segment(&piecebuf, 1);
|
|
break;
|
|
}
|
|
if (convert_to_utf8(mi, dec, charset_q.buf))
|
|
goto release_return;
|
|
|
|
strbuf_addbuf(&outbuf, dec);
|
|
strbuf_release(dec);
|
|
free(dec);
|
|
in = ep + 2;
|
|
}
|
|
strbuf_addstr(&outbuf, in);
|
|
strbuf_reset(it);
|
|
strbuf_addbuf(it, &outbuf);
|
|
found_error = 0;
|
|
release_return:
|
|
strbuf_release(&outbuf);
|
|
strbuf_release(&charset_q);
|
|
strbuf_release(&piecebuf);
|
|
|
|
if (found_error)
|
|
mi->input_error = -1;
|
|
}
|
|
|
|
static int check_header(struct mailinfo *mi,
|
|
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(mi, &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(mi, &sb);
|
|
strbuf_insert(&sb, 0, "Content-Type: ", len);
|
|
handle_content_type(mi, &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(mi, &sb);
|
|
handle_content_transfer_encoding(mi, &sb);
|
|
ret = 1;
|
|
goto check_header_out;
|
|
}
|
|
if (cmp_header(line, "Message-Id")) {
|
|
len = strlen("Message-Id: ");
|
|
strbuf_add(&sb, line->buf + len, line->len - len);
|
|
decode_header(mi, &sb);
|
|
if (mi->add_message_id)
|
|
mi->message_id = strbuf_detach(&sb, NULL);
|
|
ret = 1;
|
|
goto check_header_out;
|
|
}
|
|
|
|
check_header_out:
|
|
strbuf_release(&sb);
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Returns 1 if the given line or any line beginning with the given line is an
|
|
* in-body header (that is, check_header will succeed when passed
|
|
* mi->s_hdr_data).
|
|
*/
|
|
static int is_inbody_header(const struct mailinfo *mi,
|
|
const struct strbuf *line)
|
|
{
|
|
int i;
|
|
for (i = 0; header[i]; i++)
|
|
if (!mi->s_hdr_data[i] && cmp_header(line, header[i]))
|
|
return 1;
|
|
return 0;
|
|
}
|
|
|
|
static void decode_transfer_encoding(struct mailinfo *mi, struct strbuf *line)
|
|
{
|
|
struct strbuf *ret;
|
|
|
|
switch (mi->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 inline int patchbreak(const struct strbuf *line)
|
|
{
|
|
size_t i;
|
|
|
|
/* Beginning of a "diff -" header? */
|
|
if (starts_with(line->buf, "diff -"))
|
|
return 1;
|
|
|
|
/* CVS "Index: " line? */
|
|
if (starts_with(line->buf, "Index: "))
|
|
return 1;
|
|
|
|
/*
|
|
* "--- <filename>" starts patches without headers
|
|
* "---<sp>*" is a manual separator
|
|
*/
|
|
if (line->len < 4)
|
|
return 0;
|
|
|
|
if (starts_with(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 char *line)
|
|
{
|
|
const char *c;
|
|
int scissors = 0, gap = 0;
|
|
const char *first_nonblank = NULL, *last_nonblank = NULL;
|
|
int visible, perforation = 0, in_perforation = 0;
|
|
|
|
for (c = line; *c; c++) {
|
|
if (isspace(*c)) {
|
|
if (in_perforation) {
|
|
perforation++;
|
|
gap++;
|
|
}
|
|
continue;
|
|
}
|
|
last_nonblank = c;
|
|
if (first_nonblank == NULL)
|
|
first_nonblank = c;
|
|
if (*c == '-') {
|
|
in_perforation = 1;
|
|
perforation++;
|
|
continue;
|
|
}
|
|
if ((!memcmp(c, ">8", 2) || !memcmp(c, "8<", 2) ||
|
|
!memcmp(c, ">%", 2) || !memcmp(c, "%<", 2))) {
|
|
in_perforation = 1;
|
|
perforation += 2;
|
|
scissors += 2;
|
|
c++;
|
|
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.
|
|
*/
|
|
|
|
if (first_nonblank && last_nonblank)
|
|
visible = last_nonblank - first_nonblank + 1;
|
|
else
|
|
visible = 0;
|
|
return (scissors && 8 <= visible &&
|
|
visible < perforation * 3 &&
|
|
gap * 2 < perforation);
|
|
}
|
|
|
|
static void flush_inbody_header_accum(struct mailinfo *mi)
|
|
{
|
|
if (!mi->inbody_header_accum.len)
|
|
return;
|
|
if (!check_header(mi, &mi->inbody_header_accum, mi->s_hdr_data, 0))
|
|
BUG("inbody_header_accum, if not empty, must always contain a valid in-body header");
|
|
strbuf_reset(&mi->inbody_header_accum);
|
|
}
|
|
|
|
static int check_inbody_header(struct mailinfo *mi, const struct strbuf *line)
|
|
{
|
|
if (mi->inbody_header_accum.len &&
|
|
(line->buf[0] == ' ' || line->buf[0] == '\t')) {
|
|
if (mi->use_scissors && is_scissors_line(line->buf)) {
|
|
/*
|
|
* This is a scissors line; do not consider this line
|
|
* as a header continuation line.
|
|
*/
|
|
flush_inbody_header_accum(mi);
|
|
return 0;
|
|
}
|
|
strbuf_strip_suffix(&mi->inbody_header_accum, "\n");
|
|
strbuf_addbuf(&mi->inbody_header_accum, line);
|
|
return 1;
|
|
}
|
|
|
|
flush_inbody_header_accum(mi);
|
|
|
|
if (starts_with(line->buf, ">From") && isspace(line->buf[5]))
|
|
return is_format_patch_separator(line->buf + 1, line->len - 1);
|
|
if (starts_with(line->buf, "[PATCH]") && isspace(line->buf[7])) {
|
|
int i;
|
|
for (i = 0; header[i]; i++)
|
|
if (!strcmp("Subject", header[i])) {
|
|
handle_header(&mi->s_hdr_data[i], line);
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
if (is_inbody_header(mi, line)) {
|
|
strbuf_addbuf(&mi->inbody_header_accum, line);
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int handle_commit_msg(struct mailinfo *mi, struct strbuf *line)
|
|
{
|
|
assert(!mi->filter_stage);
|
|
|
|
if (mi->header_stage) {
|
|
if (!line->len || (line->len == 1 && line->buf[0] == '\n')) {
|
|
if (mi->inbody_header_accum.len) {
|
|
flush_inbody_header_accum(mi);
|
|
mi->header_stage = 0;
|
|
}
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
if (mi->use_inbody_headers && mi->header_stage) {
|
|
mi->header_stage = check_inbody_header(mi, line);
|
|
if (mi->header_stage)
|
|
return 0;
|
|
} else
|
|
/* Only trim the first (blank) line of the commit message
|
|
* when ignoring in-body headers.
|
|
*/
|
|
mi->header_stage = 0;
|
|
|
|
/* normalize the log message to UTF-8. */
|
|
if (convert_to_utf8(mi, line, mi->charset.buf))
|
|
return 0; /* mi->input_error already set */
|
|
|
|
if (mi->use_scissors && is_scissors_line(line->buf)) {
|
|
int i;
|
|
|
|
strbuf_setlen(&mi->log_message, 0);
|
|
mi->header_stage = 1;
|
|
|
|
/*
|
|
* We may have already read "secondary headers"; purge
|
|
* them to give ourselves a clean restart.
|
|
*/
|
|
for (i = 0; header[i]; i++) {
|
|
if (mi->s_hdr_data[i])
|
|
strbuf_release(mi->s_hdr_data[i]);
|
|
mi->s_hdr_data[i] = NULL;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
if (patchbreak(line)) {
|
|
if (mi->message_id)
|
|
strbuf_addf(&mi->log_message,
|
|
"Message-Id: %s\n", mi->message_id);
|
|
return 1;
|
|
}
|
|
|
|
strbuf_addbuf(&mi->log_message, line);
|
|
return 0;
|
|
}
|
|
|
|
static void handle_patch(struct mailinfo *mi, const struct strbuf *line)
|
|
{
|
|
fwrite(line->buf, 1, line->len, mi->patchfile);
|
|
mi->patch_lines++;
|
|
}
|
|
|
|
static void handle_filter(struct mailinfo *mi, struct strbuf *line)
|
|
{
|
|
switch (mi->filter_stage) {
|
|
case 0:
|
|
if (!handle_commit_msg(mi, line))
|
|
break;
|
|
mi->filter_stage++;
|
|
/* fallthrough */
|
|
case 1:
|
|
handle_patch(mi, line);
|
|
break;
|
|
}
|
|
}
|
|
|
|
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 (starts_with(cp, "From ") || starts_with(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)
|
|
{
|
|
struct strbuf continuation = STRBUF_INIT;
|
|
|
|
/* Get the first part of the line. */
|
|
if (strbuf_getline_lf(line, in))
|
|
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;
|
|
|
|
peek = fgetc(in);
|
|
if (peek == EOF)
|
|
break;
|
|
ungetc(peek, in);
|
|
if (peek != ' ' && peek != '\t')
|
|
break;
|
|
if (strbuf_getline_lf(&continuation, in))
|
|
break;
|
|
continuation.buf[0] = ' ';
|
|
strbuf_rtrim(&continuation);
|
|
strbuf_addbuf(line, &continuation);
|
|
}
|
|
strbuf_release(&continuation);
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int find_boundary(struct mailinfo *mi, struct strbuf *line)
|
|
{
|
|
while (!strbuf_getline_lf(line, mi->input)) {
|
|
if (*(mi->content_top) && is_multipart_boundary(mi, line))
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int handle_boundary(struct mailinfo *mi, struct strbuf *line)
|
|
{
|
|
struct strbuf newline = STRBUF_INIT;
|
|
|
|
strbuf_addch(&newline, '\n');
|
|
again:
|
|
if (line->len >= (*(mi->content_top))->len + 2 &&
|
|
!memcmp(line->buf + (*(mi->content_top))->len, "--", 2)) {
|
|
/* we hit an end boundary */
|
|
/* pop the current boundary off the stack */
|
|
strbuf_release(*(mi->content_top));
|
|
FREE_AND_NULL(*(mi->content_top));
|
|
|
|
/* technically won't happen as is_multipart_boundary()
|
|
will fail first. But just in case..
|
|
*/
|
|
if (--mi->content_top < mi->content) {
|
|
error("Detected mismatched boundaries, can't recover");
|
|
mi->input_error = -1;
|
|
mi->content_top = mi->content;
|
|
strbuf_release(&newline);
|
|
return 0;
|
|
}
|
|
handle_filter(mi, &newline);
|
|
strbuf_release(&newline);
|
|
if (mi->input_error)
|
|
return 0;
|
|
|
|
/* skip to the next boundary */
|
|
if (!find_boundary(mi, line))
|
|
return 0;
|
|
goto again;
|
|
}
|
|
|
|
/* set some defaults */
|
|
mi->transfer_encoding = TE_DONTCARE;
|
|
strbuf_reset(&mi->charset);
|
|
|
|
/* slurp in this section's info */
|
|
while (read_one_header_line(line, mi->input))
|
|
check_header(mi, line, mi->p_hdr_data, 0);
|
|
|
|
strbuf_release(&newline);
|
|
/* replenish line */
|
|
if (strbuf_getline_lf(line, mi->input))
|
|
return 0;
|
|
strbuf_addch(line, '\n');
|
|
return 1;
|
|
}
|
|
|
|
static void handle_filter_flowed(struct mailinfo *mi, struct strbuf *line,
|
|
struct strbuf *prev)
|
|
{
|
|
size_t len = line->len;
|
|
const char *rest;
|
|
|
|
if (!mi->format_flowed) {
|
|
handle_filter(mi, line);
|
|
return;
|
|
}
|
|
|
|
if (line->buf[len - 1] == '\n') {
|
|
len--;
|
|
if (len && line->buf[len - 1] == '\r')
|
|
len--;
|
|
}
|
|
|
|
/* Keep signature separator as-is. */
|
|
if (skip_prefix(line->buf, "-- ", &rest) && rest - line->buf == len) {
|
|
if (prev->len) {
|
|
handle_filter(mi, prev);
|
|
strbuf_reset(prev);
|
|
}
|
|
handle_filter(mi, line);
|
|
return;
|
|
}
|
|
|
|
/* Unstuff space-stuffed line. */
|
|
if (len && line->buf[0] == ' ') {
|
|
strbuf_remove(line, 0, 1);
|
|
len--;
|
|
}
|
|
|
|
/* Save flowed line for later, but without the soft line break. */
|
|
if (len && line->buf[len - 1] == ' ') {
|
|
strbuf_add(prev, line->buf, len - !!mi->delsp);
|
|
return;
|
|
}
|
|
|
|
/* Prepend any previous partial lines */
|
|
strbuf_insert(line, 0, prev->buf, prev->len);
|
|
strbuf_reset(prev);
|
|
|
|
handle_filter(mi, line);
|
|
}
|
|
|
|
static void handle_body(struct mailinfo *mi, struct strbuf *line)
|
|
{
|
|
struct strbuf prev = STRBUF_INIT;
|
|
|
|
/* Skip up to the first boundary */
|
|
if (*(mi->content_top)) {
|
|
if (!find_boundary(mi, line))
|
|
goto handle_body_out;
|
|
}
|
|
|
|
do {
|
|
/* process any boundary lines */
|
|
if (*(mi->content_top) && is_multipart_boundary(mi, line)) {
|
|
/* flush any leftover */
|
|
if (prev.len) {
|
|
handle_filter(mi, &prev);
|
|
strbuf_reset(&prev);
|
|
}
|
|
if (!handle_boundary(mi, line))
|
|
goto handle_body_out;
|
|
}
|
|
|
|
/* Unwrap transfer encoding */
|
|
decode_transfer_encoding(mi, line);
|
|
|
|
switch (mi->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);
|
|
|
|
/*
|
|
* 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_flowed(mi, sb, &prev);
|
|
}
|
|
/*
|
|
* 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_flowed(mi, line, &prev);
|
|
}
|
|
|
|
if (mi->input_error)
|
|
break;
|
|
} while (!strbuf_getwholeline(line, mi->input, '\n'));
|
|
|
|
if (prev.len)
|
|
handle_filter(mi, &prev);
|
|
|
|
flush_inbody_header_accum(mi);
|
|
|
|
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(struct mailinfo *mi)
|
|
{
|
|
struct strbuf *hdr;
|
|
int i;
|
|
|
|
for (i = 0; header[i]; i++) {
|
|
/* only print inbody headers if we output a patch file */
|
|
if (mi->patch_lines && mi->s_hdr_data[i])
|
|
hdr = mi->s_hdr_data[i];
|
|
else if (mi->p_hdr_data[i])
|
|
hdr = mi->p_hdr_data[i];
|
|
else
|
|
continue;
|
|
|
|
if (!strcmp(header[i], "Subject")) {
|
|
if (!mi->keep_subject) {
|
|
cleanup_subject(mi, hdr);
|
|
cleanup_space(hdr);
|
|
}
|
|
output_header_lines(mi->output, "Subject", hdr);
|
|
} else if (!strcmp(header[i], "From")) {
|
|
cleanup_space(hdr);
|
|
handle_from(mi, hdr);
|
|
fprintf(mi->output, "Author: %s\n", mi->name.buf);
|
|
fprintf(mi->output, "Email: %s\n", mi->email.buf);
|
|
} else {
|
|
cleanup_space(hdr);
|
|
fprintf(mi->output, "%s: %s\n", header[i], hdr->buf);
|
|
}
|
|
}
|
|
fprintf(mi->output, "\n");
|
|
}
|
|
|
|
int mailinfo(struct mailinfo *mi, const char *msg, const char *patch)
|
|
{
|
|
FILE *cmitmsg;
|
|
int peek;
|
|
struct strbuf line = STRBUF_INIT;
|
|
|
|
cmitmsg = fopen(msg, "w");
|
|
if (!cmitmsg) {
|
|
perror(msg);
|
|
return -1;
|
|
}
|
|
mi->patchfile = fopen(patch, "w");
|
|
if (!mi->patchfile) {
|
|
perror(patch);
|
|
fclose(cmitmsg);
|
|
return -1;
|
|
}
|
|
|
|
mi->p_hdr_data = xcalloc(MAX_HDR_PARSED, sizeof(*(mi->p_hdr_data)));
|
|
mi->s_hdr_data = xcalloc(MAX_HDR_PARSED, sizeof(*(mi->s_hdr_data)));
|
|
|
|
do {
|
|
peek = fgetc(mi->input);
|
|
if (peek == EOF) {
|
|
fclose(cmitmsg);
|
|
return error("empty patch: '%s'", patch);
|
|
}
|
|
} while (isspace(peek));
|
|
ungetc(peek, mi->input);
|
|
|
|
/* process the email header */
|
|
while (read_one_header_line(&line, mi->input))
|
|
check_header(mi, &line, mi->p_hdr_data, 1);
|
|
|
|
handle_body(mi, &line);
|
|
fwrite(mi->log_message.buf, 1, mi->log_message.len, cmitmsg);
|
|
fclose(cmitmsg);
|
|
fclose(mi->patchfile);
|
|
|
|
handle_info(mi);
|
|
strbuf_release(&line);
|
|
return mi->input_error;
|
|
}
|
|
|
|
static int git_mailinfo_config(const char *var, const char *value, void *mi_)
|
|
{
|
|
struct mailinfo *mi = mi_;
|
|
|
|
if (!starts_with(var, "mailinfo."))
|
|
return git_default_config(var, value, NULL);
|
|
if (!strcmp(var, "mailinfo.scissors")) {
|
|
mi->use_scissors = git_config_bool(var, value);
|
|
return 0;
|
|
}
|
|
/* perhaps others here */
|
|
return 0;
|
|
}
|
|
|
|
void setup_mailinfo(struct mailinfo *mi)
|
|
{
|
|
memset(mi, 0, sizeof(*mi));
|
|
strbuf_init(&mi->name, 0);
|
|
strbuf_init(&mi->email, 0);
|
|
strbuf_init(&mi->charset, 0);
|
|
strbuf_init(&mi->log_message, 0);
|
|
strbuf_init(&mi->inbody_header_accum, 0);
|
|
mi->header_stage = 1;
|
|
mi->use_inbody_headers = 1;
|
|
mi->content_top = mi->content;
|
|
git_config(git_mailinfo_config, mi);
|
|
}
|
|
|
|
void clear_mailinfo(struct mailinfo *mi)
|
|
{
|
|
int i;
|
|
|
|
strbuf_release(&mi->name);
|
|
strbuf_release(&mi->email);
|
|
strbuf_release(&mi->charset);
|
|
strbuf_release(&mi->inbody_header_accum);
|
|
free(mi->message_id);
|
|
|
|
if (mi->p_hdr_data)
|
|
for (i = 0; mi->p_hdr_data[i]; i++)
|
|
strbuf_release(mi->p_hdr_data[i]);
|
|
free(mi->p_hdr_data);
|
|
if (mi->s_hdr_data)
|
|
for (i = 0; mi->s_hdr_data[i]; i++)
|
|
strbuf_release(mi->s_hdr_data[i]);
|
|
free(mi->s_hdr_data);
|
|
|
|
while (mi->content < mi->content_top) {
|
|
free(*(mi->content_top));
|
|
mi->content_top--;
|
|
}
|
|
|
|
strbuf_release(&mi->log_message);
|
|
}
|