Move the bulk of the code from builtin/mailinfo.c to mailinfo.c
so that new callers can start calling mailinfo() directly.
Note that a few calls to exit() and die() need to be cleaned up
for the API to be truly useful, which will come in later steps.
Signed-off-by: Junio C Hamano <gitster@xxxxxxxxx>
---
Makefile | 1 +
builtin/mailinfo.c | 1036 +---------------------------------------------------
mailinfo.c | 1007 ++++++++++++++++++++++++++++++++++++++++++++++++++
mailinfo.h | 40 ++
4 files changed, 1049 insertions(+), 1035 deletions(-)
create mode 100644 mailinfo.c
create mode 100644 mailinfo.h
diff --git a/Makefile b/Makefile
index 8d5df7e..7dd3bff 100644
--- a/Makefile
+++ b/Makefile
@@ -726,6 +726,7 @@ LIB_OBJS += list-objects.o
LIB_OBJS += ll-merge.o
LIB_OBJS += lockfile.o
LIB_OBJS += log-tree.o
+LIB_OBJS += mailinfo.o
LIB_OBJS += mailmap.o
LIB_OBJS += match-trees.o
LIB_OBJS += merge.o
diff --git a/builtin/mailinfo.c b/builtin/mailinfo.c
index de446ec..f6df274 100644
--- a/builtin/mailinfo.c
+++ b/builtin/mailinfo.c
@@ -6,1041 +6,7 @@
#include "builtin.h"
#include "utf8.h"
#include "strbuf.h"
-
-#define MAX_BOUNDARIES 5
-
-struct mailinfo {
- FILE *input;
- FILE *output;
- FILE *patchfile;
-
- struct strbuf name;
- struct strbuf email;
- int keep_subject;
- int keep_non_patch_brackets_in_subject;
- int add_message_id;
- int use_scissors;
- int use_inbody_headers; /* defaults to 1 */
- const char *metainfo_charset;
-
- struct strbuf *content[MAX_BOUNDARIES];
- struct strbuf **content_top;
- struct strbuf charset;
- char *message_id;
- enum {
- TE_DONTCARE, TE_QP, TE_BASE64
- } transfer_encoding;
- int patch_lines;
- int filter_stage; /* still reading log or are we copying patch? */
- int header_stage; /* still checking in-body headers? */
- struct strbuf **p_hdr_data;
- struct strbuf **s_hdr_data;
-
- struct strbuf log_message;
-};
-
-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 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(struct mailinfo *mi, 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 (mi->email.len)
- return;
-
- bra = strchr(line->buf, '<');
- if (!bra)
- return;
- ket = strchr(bra, '>');
- if (!ket)
- return;
-
- strbuf_reset(&mi->email);
- strbuf_add(&mi->email, bra + 1, ket - bra - 1);
-
- strbuf_reset(&mi->name);
- strbuf_add(&mi->name, line->buf, bra - line->buf);
- strbuf_trim(&mi->name);
- get_sane_name(&mi->name, &mi->name, &mi->email);
-}
-
-static void handle_from(struct mailinfo *mi, 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(mi, from);
- return;
- }
-
- /*
- * If we already have one email, don't take any confusing lines
- */
- if (mi->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(&mi->email);
- strbuf_add(&mi->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(&mi->name, &f, &mi->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;
-
- strbuf_setlen(attr, 0);
- if (!ap)
- return 0;
- ap += strlen(name);
- if (*ap == '"') {
- ap++;
- ends = "\"";
- }
- else
- ends = "; \t";
- sz = strcspn(ap, ends);
- strbuf_add(attr, ap, sz);
- return 1;
-}
-
-static void handle_content_type(struct mailinfo *mi, struct strbuf *line)
-{
- struct strbuf *boundary = xmalloc(sizeof(struct strbuf));
- strbuf_init(boundary, line->len);
-
- if (slurp_attr(line->buf, "boundary=", boundary)) {
- strbuf_insert(boundary, 0, "--", 2);
- if (++mi->content_top >= &mi->content[MAX_BOUNDARIES]) {
- fprintf(stderr, "Too many boundaries to handle\n");
- exit(1);
- }
- *(mi->content_top) = boundary;
- boundary = NULL;
- }
- slurp_attr(line->buf, "charset=", &mi->charset);
-
- if (boundary) {
- strbuf_release(boundary);
- free(boundary);
- }
-}
-
-static void handle_message_id(struct mailinfo *mi, const struct strbuf *line)
-{
- if (mi->add_message_id)
- mi->message_id = strdup(line->buf);
-}
-
-static void handle_content_transfer_encoding(struct mailinfo *mi,
- const struct strbuf *line)
-{
- if (strcasestr(line->buf, "base64"))
- mi->transfer_encoding = TE_BASE64;
- else if (strcasestr(line->buf, "quoted-printable"))
- mi->transfer_encoding = TE_QP;
- else
- mi->transfer_encoding = TE_DONTCARE;
-}
-
-static int is_multipart_boundary(struct mailinfo *mi, const struct strbuf *line)
-{
- struct strbuf *content_top = *(mi->content_top);
-
- return ((content_top->len <= line->len) &&
- !memcmp(line->buf, content_top->buf, content_top->len));
-}
-
-static void cleanup_subject(struct mailinfo *mi, 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 ((subject->buf[at + 1] == 'e' ||
- subject->buf[at + 1] == 'E') &&
- subject->buf[at + 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 (!mi->keep_non_patch_brackets_in_subject ||
- (7 <= remove &&
- memmem(subject->buf + at, remove, "PATCH", 5)))
- strbuf_remove(subject, at, remove);
- else {
- at += remove;
- /*
- * If the input had a space after the ], keep
- * it. We don't bother with finding the end of
- * the space, since we later normalize it
- * anyway.
- */
- if (isspace(subject->buf[at]))
- at += 1;
- }
- continue;
- }
- break;
- }
- strbuf_trim(subject);
-}
-
-#define MAX_HDR_PARSED 10
-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 is_format_patch_separator(const char *line, int len)
-{
- static const char SAMPLE[] =
- "From e6807f3efca28b30decfecb1732a56c7db1137ee Mon Sep 17 00:00:00 2001\n";
- const char *cp;
-
- if (len != strlen(SAMPLE))
- return 0;
- if (!skip_prefix(line, "From ", &cp))
- return 0;
- if (strspn(cp, "0123456789abcdef") != 40)
- return 0;
- cp += 40;
- return !memcmp(SAMPLE + (cp - line), cp, strlen(SAMPLE) - (cp - line));
-}
-
-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;
-}
-
-static void convert_to_utf8(struct mailinfo *mi,
- struct strbuf *line, const char *charset)
-{
- char *out;
-
- if (!mi->metainfo_charset || !charset || !*charset)
- return;
-
- if (same_encoding(mi->metainfo_charset, charset))
- return;
- out = reencode_string(line->buf, mi->metainfo_charset, charset);
- if (!out)
- die("cannot convert from %s to %s",
- charset, mi->metainfo_charset);
- strbuf_attach(line, out, strlen(out), strlen(out));
-}
-
-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;
-
- 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;
- }
- convert_to_utf8(mi, 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);
-release_return:
- strbuf_release(&outbuf);
- strbuf_release(&charset_q);
- strbuf_release(&piecebuf);
-}
-
-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);
- handle_message_id(mi, &sb);
- ret = 1;
- goto check_header_out;
- }
-
- /* for inbody stuff */
- if (starts_with(line->buf, ">From") && isspace(line->buf[5])) {
- ret = is_format_patch_separator(line->buf + 1, line->len - 1);
- goto check_header_out;
- }
- if (starts_with(line->buf, "[PATCH]") && isspace(line->buf[7])) {
- for (i = 0; header[i]; i++) {
- if (!strcmp("Subject", header[i])) {
- handle_header(&hdr_data[i], line);
- ret = 1;
- goto check_header_out;
- }
- }
- }
-
-check_header_out:
- strbuf_release(&sb);
- return ret;
-}
-
-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 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) ||
- !memcmp(buf + i, ">%", 2) || !memcmp(buf + i, "%<", 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 mailinfo *mi, struct strbuf *line)
-{
- assert(!mi->filter_stage);
-
- if (mi->header_stage) {
- if (!line->len || (line->len == 1 && line->buf[0] == '\n'))
- return 0;
- }
-
- if (mi->use_inbody_headers && mi->header_stage) {
- mi->header_stage = check_header(mi, line, mi->s_hdr_data, 0);
- 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. */
- convert_to_utf8(mi, line, mi->charset.buf);
-
- if (mi->use_scissors && is_scissors_line(line)) {
- 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++;
- 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)
-{
- /* 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] = ' ';
- strbuf_rtrim(&continuation);
- strbuf_addbuf(line, &continuation);
- }
-
- return 1;
-}
-
-static int find_boundary(struct mailinfo *mi, struct strbuf *line)
-{
- while (!strbuf_getline(line, mi->input, '\n')) {
- 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(*(mi->content_top));
- *(mi->content_top) = NULL;
-
- /* technically won't happen as is_multipart_boundary()
- will fail first. But just in case..
- */
- if (--mi->content_top < mi->content) {
- fprintf(stderr, "Detected mismatched boundaries, "
- "can't recover\n");
- exit(1);
- }
- handle_filter(mi, &newline);
- strbuf_release(&newline);
-
- /* 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(line, mi->input, '\n'))
- return 0;
- strbuf_addch(line, '\n');
- return 1;
-}
-
-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(mi, 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(mi, line);
- }
-
- } while (!strbuf_getwholeline(line, mi->input, '\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(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");
-}
-
-static 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);
- } 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);
-
- return 0;
-}
-
-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;
-}
-
-static 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);
- mi->header_stage = 1;
- mi->use_inbody_headers = 1;
- mi->content_top = mi->content;
- git_config(git_mailinfo_config, &mi);
-}
-
-static void clear_mailinfo(struct mailinfo *mi)
-{
- strbuf_release(&mi->name);
- strbuf_release(&mi->email);
- strbuf_release(&mi->charset);
- strbuf_release(&mi->log_message);
-
- while (mi->content < mi->content_top) {
- free(*(mi->content_top));
- mi->content_top--;
- }
-}
+#include "mailinfo.h"
static const char mailinfo_usage[] =
"git mailinfo [-k | -b] [-m | --message-id] [-u | --encoding=<encoding> | -n] [--scissors | --no-scissors] <msg> <patch> < mail >info";
diff --git a/mailinfo.c b/mailinfo.c
new file mode 100644
index 0000000..59479f6
--- /dev/null
+++ b/mailinfo.c
@@ -0,0 +1,1007 @@
+#include "cache.h"
+#include "utf8.h"
+#include "strbuf.h"
+#include "mailinfo.h"
+
+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 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(struct mailinfo *mi, 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 (mi->email.len)
+ return;
+
+ bra = strchr(line->buf, '<');
+ if (!bra)
+ return;
+ ket = strchr(bra, '>');
+ if (!ket)
+ return;
+
+ strbuf_reset(&mi->email);
+ strbuf_add(&mi->email, bra + 1, ket - bra - 1);
+
+ strbuf_reset(&mi->name);
+ strbuf_add(&mi->name, line->buf, bra - line->buf);
+ strbuf_trim(&mi->name);
+ get_sane_name(&mi->name, &mi->name, &mi->email);
+}
+
+static void handle_from(struct mailinfo *mi, 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(mi, from);
+ return;
+ }
+
+ /*
+ * If we already have one email, don't take any confusing lines
+ */
+ if (mi->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(&mi->email);
+ strbuf_add(&mi->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(&mi->name, &f, &mi->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;
+
+ strbuf_setlen(attr, 0);
+ if (!ap)
+ return 0;
+ ap += strlen(name);
+ if (*ap == '"') {
+ ap++;
+ ends = "\"";
+ }
+ else
+ ends = "; \t";
+ sz = strcspn(ap, ends);
+ strbuf_add(attr, ap, sz);
+ return 1;
+}
+
+static void handle_content_type(struct mailinfo *mi, struct strbuf *line)
+{
+ struct strbuf *boundary = xmalloc(sizeof(struct strbuf));
+ strbuf_init(boundary, line->len);
+
+ if (slurp_attr(line->buf, "boundary=", boundary)) {
+ strbuf_insert(boundary, 0, "--", 2);
+ if (++mi->content_top >= &mi->content[MAX_BOUNDARIES]) {
+ fprintf(stderr, "Too many boundaries to handle\n");
+ exit(1);
+ }
+ *(mi->content_top) = boundary;
+ boundary = NULL;
+ }
+ slurp_attr(line->buf, "charset=", &mi->charset);
+
+ if (boundary) {
+ strbuf_release(boundary);
+ free(boundary);
+ }
+}
+
+static void handle_message_id(struct mailinfo *mi, const struct strbuf *line)
+{
+ if (mi->add_message_id)
+ mi->message_id = strdup(line->buf);
+}
+
+static void handle_content_transfer_encoding(struct mailinfo *mi,
+ const struct strbuf *line)
+{
+ if (strcasestr(line->buf, "base64"))
+ mi->transfer_encoding = TE_BASE64;
+ else if (strcasestr(line->buf, "quoted-printable"))
+ mi->transfer_encoding = TE_QP;
+ else
+ mi->transfer_encoding = TE_DONTCARE;
+}
+
+static int is_multipart_boundary(struct mailinfo *mi, const struct strbuf *line)
+{
+ struct strbuf *content_top = *(mi->content_top);
+
+ return ((content_top->len <= line->len) &&
+ !memcmp(line->buf, content_top->buf, content_top->len));
+}
+
+static void cleanup_subject(struct mailinfo *mi, 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 ((subject->buf[at + 1] == 'e' ||
+ subject->buf[at + 1] == 'E') &&
+ subject->buf[at + 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 (!mi->keep_non_patch_brackets_in_subject ||
+ (7 <= remove &&
+ memmem(subject->buf + at, remove, "PATCH", 5)))
+ strbuf_remove(subject, at, remove);
+ else {
+ at += remove;
+ /*
+ * If the input had a space after the ], keep
+ * it. We don't bother with finding the end of
+ * the space, since we later normalize it
+ * anyway.
+ */
+ if (isspace(subject->buf[at]))
+ at += 1;
+ }
+ continue;
+ }
+ break;
+ }
+ strbuf_trim(subject);
+}
+
+#define MAX_HDR_PARSED 10
+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 is_format_patch_separator(const char *line, int len)
+{
+ static const char SAMPLE[] =
+ "From e6807f3efca28b30decfecb1732a56c7db1137ee Mon Sep 17 00:00:00 2001\n";
+ const char *cp;
+
+ if (len != strlen(SAMPLE))
+ return 0;
+ if (!skip_prefix(line, "From ", &cp))
+ return 0;
+ if (strspn(cp, "0123456789abcdef") != 40)
+ return 0;
+ cp += 40;
+ return !memcmp(SAMPLE + (cp - line), cp, strlen(SAMPLE) - (cp - line));
+}
+
+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;
+}
+
+static void convert_to_utf8(struct mailinfo *mi,
+ struct strbuf *line, const char *charset)
+{
+ char *out;
+
+ if (!mi->metainfo_charset || !charset || !*charset)
+ return;
+
+ if (same_encoding(mi->metainfo_charset, charset))
+ return;
+ out = reencode_string(line->buf, mi->metainfo_charset, charset);
+ if (!out)
+ die("cannot convert from %s to %s",
+ charset, mi->metainfo_charset);
+ strbuf_attach(line, out, strlen(out), strlen(out));
+}
+
+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;
+
+ 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;
+ }
+ convert_to_utf8(mi, 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);
+release_return:
+ strbuf_release(&outbuf);
+ strbuf_release(&charset_q);
+ strbuf_release(&piecebuf);
+}
+
+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);
+ handle_message_id(mi, &sb);
+ ret = 1;
+ goto check_header_out;
+ }
+
+ /* for inbody stuff */
+ if (starts_with(line->buf, ">From") && isspace(line->buf[5])) {
+ ret = is_format_patch_separator(line->buf + 1, line->len - 1);
+ goto check_header_out;
+ }
+ if (starts_with(line->buf, "[PATCH]") && isspace(line->buf[7])) {
+ for (i = 0; header[i]; i++) {
+ if (!strcmp("Subject", header[i])) {
+ handle_header(&hdr_data[i], line);
+ ret = 1;
+ goto check_header_out;
+ }
+ }
+ }
+
+check_header_out:
+ strbuf_release(&sb);
+ return ret;
+}
+
+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 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) ||
+ !memcmp(buf + i, ">%", 2) || !memcmp(buf + i, "%<", 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 mailinfo *mi, struct strbuf *line)
+{
+ assert(!mi->filter_stage);
+
+ if (mi->header_stage) {
+ if (!line->len || (line->len == 1 && line->buf[0] == '\n'))
+ return 0;
+ }
+
+ if (mi->use_inbody_headers && mi->header_stage) {
+ mi->header_stage = check_header(mi, line, mi->s_hdr_data, 0);
+ 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. */
+ convert_to_utf8(mi, line, mi->charset.buf);
+
+ if (mi->use_scissors && is_scissors_line(line)) {
+ 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++;
+ 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)
+{
+ /* 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] = ' ';
+ strbuf_rtrim(&continuation);
+ strbuf_addbuf(line, &continuation);
+ }
+
+ return 1;
+}
+
+static int find_boundary(struct mailinfo *mi, struct strbuf *line)
+{
+ while (!strbuf_getline(line, mi->input, '\n')) {
+ 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(*(mi->content_top));
+ *(mi->content_top) = NULL;
+
+ /* technically won't happen as is_multipart_boundary()
+ will fail first. But just in case..
+ */
+ if (--mi->content_top < mi->content) {
+ fprintf(stderr, "Detected mismatched boundaries, "
+ "can't recover\n");
+ exit(1);
+ }
+ handle_filter(mi, &newline);
+ strbuf_release(&newline);
+
+ /* 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(line, mi->input, '\n'))
+ return 0;
+ strbuf_addch(line, '\n');
+ return 1;
+}
+
+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(mi, 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(mi, line);
+ }
+
+ } while (!strbuf_getwholeline(line, mi->input, '\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(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);
+ } 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);
+
+ return 0;
+}
+
+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);
+ 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)
+{
+ strbuf_release(&mi->name);
+ strbuf_release(&mi->email);
+ strbuf_release(&mi->charset);
+ strbuf_release(&mi->log_message);
+
+ while (mi->content < mi->content_top) {
+ free(*(mi->content_top));
+ mi->content_top--;
+ }
+}
diff --git a/mailinfo.h b/mailinfo.h
new file mode 100644
index 0000000..27841be
--- /dev/null
+++ b/mailinfo.h
@@ -0,0 +1,40 @@
+#ifndef MAILINFO_H
+#define MAILINFO_H
+
+#define MAX_BOUNDARIES 5
+
+struct mailinfo {
+ FILE *input;
+ FILE *output;
+ FILE *patchfile;
+
+ struct strbuf name;
+ struct strbuf email;
+ int keep_subject;
+ int keep_non_patch_brackets_in_subject;
+ int add_message_id;
+ int use_scissors;
+ int use_inbody_headers; /* defaults to 1 */
+ const char *metainfo_charset;
+
+ struct strbuf *content[MAX_BOUNDARIES];
+ struct strbuf **content_top;
+ struct strbuf charset;
+ char *message_id;
+ enum {
+ TE_DONTCARE, TE_QP, TE_BASE64
+ } transfer_encoding;
+ int patch_lines;
+ int filter_stage; /* still reading log or are we copying patch? */
+ int header_stage; /* still checking in-body headers? */
+ struct strbuf **p_hdr_data;
+ struct strbuf **s_hdr_data;
+
+ struct strbuf log_message;
+};
+
+extern void setup_mailinfo(struct mailinfo *);
+extern int mailinfo(struct mailinfo *, const char *msg, const char *patch);
+extern void clear_mailinfo(struct mailinfo *);
+
+#endif /* MAILINFO_H */
--
2.6.1-320-g86a1181
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