mirror of
https://github.com/git/git.git
synced 2024-11-24 10:26:17 +08:00
builtin-mailinfo.c infrastrcture changes
I am working on a project that required parsing through regular mboxes that didn't necessarily have patches embedded in them. I started by creating my own modified copy of git-am and working from there. Very quickly, I noticed git-mailinfo wasn't able to handle a big chunk of my email. After hacking up numerous solutions and running into more limitations, I decided it was just easier to rewrite a big chunk of it. The following patch has a bunch of fixes and features that I needed in order for me do what I wanted. Note: I'm didn't follow any email rfc papers but I don't think any of the changes I did required much knowledge (besides the boundary stuff). List of major changes/fixes: - can't create empty patch files fix - empty patch files don't fail, this failure will come inside git-am - multipart boundaries are now handled - only output inbody headers if a patch exists otherwise assume those headers are part of the reply and instead output the original headers - decode and filter base64 patches correctly - various other accidental fixes I believe I didn't break any existing functionality or compatibility (other than what I describe above, which is really only the empty patch file). I tested this through various mailing list archives and everything seemed to parse correctly (a couple thousand emails). [jc: squashed in another patch from Don's five patch series to fix the test case, as this patch exposes the bug in the test.] Signed-off-by: Don Zickus <dzickus@redhat.com> Signed-off-by: Junio C Hamano <junkio@cox.net>
This commit is contained in:
Don Zickus
Junio C Hamano
parent
27ebd6e044
commit
87ab799234
@ -11,19 +11,22 @@ static FILE *cmitmsg, *patchfile, *fin, *fout;
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static int keep_subject;
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static const char *metainfo_charset;
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static char line[1000];
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static char date[1000];
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static char name[1000];
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static char email[1000];
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static char subject[1000];
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static enum {
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TE_DONTCARE, TE_QP, TE_BASE64,
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} transfer_encoding;
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static char charset[256];
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static enum {
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TYPE_TEXT, TYPE_OTHER,
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} message_type;
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static char multipart_boundary[1000];
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static int multipart_boundary_len;
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static char charset[256];
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static int patch_lines;
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static char **p_hdr_data, **s_hdr_data;
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#define MAX_HDR_PARSED 10
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#define MAX_BOUNDARIES 5
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static char *sanity_check(char *name, char *email)
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{
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@ -137,15 +140,13 @@ static int handle_from(char *in_line)
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return 1;
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}
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static int handle_date(char *line)
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static int handle_header(char *line, char *data, int ofs)
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{
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strcpy(date, line);
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return 0;
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}
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if (!line || !data)
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return 1;
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strcpy(data, line+ofs);
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static int handle_subject(char *line)
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{
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strcpy(subject, line);
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return 0;
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}
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@ -177,17 +178,32 @@ static int slurp_attr(const char *line, const char *name, char *attr)
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return 1;
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}
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static int handle_subcontent_type(char *line)
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struct content_type {
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char *boundary;
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int boundary_len;
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};
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static struct content_type content[MAX_BOUNDARIES];
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static struct content_type *content_top = content;
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static int handle_content_type(char *line)
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{
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/* We do not want to mess with boundary. Note that we do not
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* handle nested multipart.
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*/
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if (strcasestr(line, "boundary=")) {
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fprintf(stderr, "Not handling nested multipart message.\n");
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char boundary[256];
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if (strcasestr(line, "text/") == NULL)
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message_type = TYPE_OTHER;
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if (slurp_attr(line, "boundary=", boundary + 2)) {
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memcpy(boundary, "--", 2);
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if (content_top++ >= &content[MAX_BOUNDARIES]) {
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fprintf(stderr, "Too many boundaries to handle\n");
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exit(1);
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}
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slurp_attr(line, "charset=", charset);
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if (*charset) {
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content_top->boundary_len = strlen(boundary);
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content_top->boundary = xmalloc(content_top->boundary_len+1);
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strcpy(content_top->boundary, boundary);
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}
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if (slurp_attr(line, "charset=", charset)) {
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int i, c;
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for (i = 0; (c = charset[i]) != 0; i++)
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charset[i] = tolower(c);
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@ -195,17 +211,6 @@ static int handle_subcontent_type(char *line)
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return 0;
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}
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static int handle_content_type(char *line)
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{
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*multipart_boundary = 0;
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if (slurp_attr(line, "boundary=", multipart_boundary + 2)) {
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memcpy(multipart_boundary, "--", 2);
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multipart_boundary_len = strlen(multipart_boundary);
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}
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slurp_attr(line, "charset=", charset);
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return 0;
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}
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static int handle_content_transfer_encoding(char *line)
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{
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if (strcasestr(line, "base64"))
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@ -219,7 +224,7 @@ static int handle_content_transfer_encoding(char *line)
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static int is_multipart_boundary(const char *line)
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{
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return (!memcmp(line, multipart_boundary, multipart_boundary_len));
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return (!memcmp(line, content_top->boundary, content_top->boundary_len));
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}
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static int eatspace(char *line)
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@ -230,62 +235,6 @@ static int eatspace(char *line)
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return len;
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}
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#define SEEN_FROM 01
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#define SEEN_DATE 02
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#define SEEN_SUBJECT 04
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#define SEEN_BOGUS_UNIX_FROM 010
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#define SEEN_PREFIX 020
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/* First lines of body can have From:, Date:, and Subject: or empty */
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static void handle_inbody_header(int *seen, char *line)
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{
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if (*seen & SEEN_PREFIX)
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return;
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if (isspace(*line)) {
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char *cp;
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for (cp = line + 1; *cp; cp++) {
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if (!isspace(*cp))
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break;
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}
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if (!*cp)
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return;
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}
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if (!memcmp(">From", line, 5) && isspace(line[5])) {
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if (!(*seen & SEEN_BOGUS_UNIX_FROM)) {
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*seen |= SEEN_BOGUS_UNIX_FROM;
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return;
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}
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}
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if (!memcmp("From:", line, 5) && isspace(line[5])) {
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if (!(*seen & SEEN_FROM) && handle_from(line+6)) {
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*seen |= SEEN_FROM;
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return;
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}
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}
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if (!memcmp("Date:", line, 5) && isspace(line[5])) {
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if (!(*seen & SEEN_DATE)) {
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handle_date(line+6);
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*seen |= SEEN_DATE;
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return;
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}
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}
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if (!memcmp("Subject:", line, 8) && isspace(line[8])) {
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if (!(*seen & SEEN_SUBJECT)) {
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handle_subject(line+9);
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*seen |= SEEN_SUBJECT;
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return;
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}
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}
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if (!memcmp("[PATCH]", line, 7) && isspace(line[7])) {
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if (!(*seen & SEEN_SUBJECT)) {
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handle_subject(line);
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*seen |= SEEN_SUBJECT;
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return;
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}
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}
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*seen |= SEEN_PREFIX;
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}
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static char *cleanup_subject(char *subject)
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{
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if (keep_subject)
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@ -341,57 +290,62 @@ static void cleanup_space(char *buf)
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}
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static void decode_header(char *it);
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typedef int (*header_fn_t)(char *);
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struct header_def {
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const char *name;
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header_fn_t func;
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int namelen;
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static char *header[MAX_HDR_PARSED] = {
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"From","Subject","Date",
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};
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static void check_header(char *line, struct header_def *header)
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static int check_header(char *line, char **hdr_data)
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{
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int i;
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if (header[0].namelen <= 0) {
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for (i = 0; header[i].name; i++)
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header[i].namelen = strlen(header[i].name);
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}
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for (i = 0; header[i].name; i++) {
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int len = header[i].namelen;
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if (!strncasecmp(line, header[i].name, len) &&
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/* search for the interesting parts */
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for (i = 0; header[i]; i++) {
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int len = strlen(header[i]);
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if (!hdr_data[i] &&
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!strncasecmp(line, header[i], len) &&
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line[len] == ':' && isspace(line[len + 1])) {
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/* Unwrap inline B and Q encoding, and optionally
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* normalize the meta information to utf8.
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*/
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decode_header(line + len + 2);
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header[i].func(line + len + 2);
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break;
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hdr_data[i] = xmalloc(1000 * sizeof(char));
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if (! handle_header(line, hdr_data[i], len + 2)) {
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return 1;
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}
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}
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}
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static void check_subheader_line(char *line)
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{
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static struct header_def header[] = {
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{ "Content-Type", handle_subcontent_type },
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{ "Content-Transfer-Encoding",
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handle_content_transfer_encoding },
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{ NULL },
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};
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check_header(line, header);
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/* Content stuff */
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if (!strncasecmp(line, "Content-Type", 12) &&
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line[12] == ':' && isspace(line[12 + 1])) {
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decode_header(line + 12 + 2);
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if (! handle_content_type(line)) {
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return 1;
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}
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static void check_header_line(char *line)
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{
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static struct header_def header[] = {
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{ "From", handle_from },
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{ "Date", handle_date },
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{ "Subject", handle_subject },
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{ "Content-Type", handle_content_type },
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{ "Content-Transfer-Encoding",
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handle_content_transfer_encoding },
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{ NULL },
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};
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check_header(line, header);
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}
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if (!strncasecmp(line, "Content-Transfer-Encoding", 25) &&
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line[25] == ':' && isspace(line[25 + 1])) {
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decode_header(line + 25 + 2);
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if (! handle_content_transfer_encoding(line)) {
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return 1;
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}
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}
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/* for inbody stuff */
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if (!memcmp(">From", line, 5) && isspace(line[5]))
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return 1;
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if (!memcmp("[PATCH]", line, 7) && isspace(line[7])) {
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for (i = 0; header[i]; i++) {
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if (!memcmp("Subject: ", header[i], 9)) {
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if (! handle_header(line, hdr_data[i], 0)) {
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return 1;
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}
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}
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}
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}
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/* no match */
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return 0;
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}
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static int is_rfc2822_header(char *line)
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@ -647,41 +601,141 @@ static void decode_transfer_encoding(char *line)
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}
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}
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static void handle_info(void)
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static int handle_filter(char *line);
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static int find_boundary(void)
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{
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char *sub;
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sub = cleanup_subject(subject);
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cleanup_space(name);
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cleanup_space(date);
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cleanup_space(email);
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cleanup_space(sub);
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fprintf(fout, "Author: %s\nEmail: %s\nSubject: %s\nDate: %s\n\n",
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name, email, sub, date);
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while(fgets(line, sizeof(line), fin) != NULL) {
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if (is_multipart_boundary(line))
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return 1;
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}
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return 0;
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}
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/* We are inside message body and have read line[] already.
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* Spit out the commit log.
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*/
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static int handle_commit_msg(int *seen)
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static int handle_boundary(void)
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{
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again:
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if (!memcmp(line+content_top->boundary_len, "--", 2)) {
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/* we hit an end boundary */
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/* pop the current boundary off the stack */
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free(content_top->boundary);
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/* technically won't happen as is_multipart_boundary()
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will fail first. But just in case..
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*/
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if (content_top-- < content) {
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fprintf(stderr, "Detected mismatched boundaries, "
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"can't recover\n");
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exit(1);
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}
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handle_filter("\n");
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/* skip to the next boundary */
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if (!find_boundary())
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return 0;
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goto again;
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}
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/* set some defaults */
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transfer_encoding = TE_DONTCARE;
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charset[0] = 0;
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message_type = TYPE_TEXT;
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/* slurp in this section's info */
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while (read_one_header_line(line, sizeof(line), fin))
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check_header(line, p_hdr_data);
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/* eat the blank line after section info */
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return (fgets(line, sizeof(line), fin) != NULL);
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}
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static int handle_commit_msg(char *line)
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{
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static int still_looking = 1;
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if (!cmitmsg)
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return 0;
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do {
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if (still_looking) {
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char *cp = line;
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if (isspace(*line)) {
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for (cp = line + 1; *cp; cp++) {
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if (!isspace(*cp))
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break;
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}
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if (!*cp)
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return 0;
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}
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if ((still_looking = check_header(cp, s_hdr_data)) != 0)
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return 0;
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}
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if (!memcmp("diff -", line, 6) ||
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!memcmp("---", line, 3) ||
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!memcmp("Index: ", line, 7))
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break;
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if ((multipart_boundary[0] && is_multipart_boundary(line))) {
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/* We come here when the first part had only
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* the commit message without any patch. We
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* pretend we have not seen this line yet, and
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* go back to the loop.
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*/
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!memcmp("Index: ", line, 7)) {
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fclose(cmitmsg);
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cmitmsg = NULL;
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return 1;
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}
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fputs(line, cmitmsg);
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return 0;
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}
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static int handle_patch(char *line)
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{
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fputs(line, patchfile);
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patch_lines++;
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return 0;
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}
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static int handle_filter(char *line)
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{
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static int filter = 0;
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|
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/* filter tells us which part we left off on
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* a non-zero return indicates we hit a filter point
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*/
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switch (filter) {
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case 0:
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if (!handle_commit_msg(line))
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break;
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filter++;
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case 1:
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if (!handle_patch(line))
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break;
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filter++;
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default:
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return 1;
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}
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return 0;
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}
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static void handle_body(void)
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{
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int rc = 0;
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static char newline[2000];
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static char *np = newline;
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/* Skip up to the first boundary */
|
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if (content_top->boundary) {
|
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if (!find_boundary())
|
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return;
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}
|
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|
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do {
|
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/* process any boundary lines */
|
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if (content_top->boundary && is_multipart_boundary(line)) {
|
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/* flush any leftover */
|
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if ((transfer_encoding == TE_BASE64) &&
|
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(np != newline)) {
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handle_filter(newline);
|
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}
|
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if (!handle_boundary())
|
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return;
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}
|
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|
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/* Unwrap transfer encoding and optionally
|
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* normalize the log message to UTF-8.
|
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*/
|
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@ -689,105 +743,80 @@ static int handle_commit_msg(int *seen)
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if (metainfo_charset)
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convert_to_utf8(line, charset);
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|
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handle_inbody_header(seen, line);
|
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if (!(*seen & SEEN_PREFIX))
|
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switch (transfer_encoding) {
|
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case TE_BASE64:
|
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{
|
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char *op = line;
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|
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/* binary data most likely doesn't have newlines */
|
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if (message_type != TYPE_TEXT) {
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rc = handle_filter(line);
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break;
|
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}
|
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|
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/* this is a decoded line that may contain
|
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* multiple new lines. Pass only one chunk
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* at a time to handle_filter()
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*/
|
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do {
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while (*op != '\n' && *op != 0)
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*np++ = *op++;
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*np = *op;
|
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if (*np != 0) {
|
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/* should be sitting on a new line */
|
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*(++np) = 0;
|
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op++;
|
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rc = handle_filter(newline);
|
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np = newline;
|
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}
|
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} while (*op != 0);
|
||||
/* the partial chunk is saved in newline and
|
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* will be appended by the next iteration of fgets
|
||||
*/
|
||||
break;
|
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}
|
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default:
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rc = handle_filter(line);
|
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}
|
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if (rc)
|
||||
/* nothing left to filter */
|
||||
break;
|
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} while (fgets(line, sizeof(line), fin));
|
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|
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return;
|
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}
|
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|
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static void handle_info(void)
|
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{
|
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char *sub;
|
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char *hdr;
|
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int i;
|
||||
|
||||
for (i = 0; header[i]; i++) {
|
||||
|
||||
/* only print inbody headers if we output a patch file */
|
||||
if (patch_lines && s_hdr_data[i])
|
||||
hdr = s_hdr_data[i];
|
||||
else if (p_hdr_data[i])
|
||||
hdr = p_hdr_data[i];
|
||||
else
|
||||
continue;
|
||||
|
||||
fputs(line, cmitmsg);
|
||||
} while (fgets(line, sizeof(line), fin) != NULL);
|
||||
fclose(cmitmsg);
|
||||
cmitmsg = NULL;
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* We have done the commit message and have the first
|
||||
* line of the patch in line[].
|
||||
*/
|
||||
static void handle_patch(void)
|
||||
{
|
||||
do {
|
||||
if (multipart_boundary[0] && is_multipart_boundary(line))
|
||||
break;
|
||||
/* Only unwrap transfer encoding but otherwise do not
|
||||
* do anything. We do *NOT* want UTF-8 conversion
|
||||
* here; we are dealing with the user payload.
|
||||
*/
|
||||
decode_transfer_encoding(line);
|
||||
fputs(line, patchfile);
|
||||
patch_lines++;
|
||||
} while (fgets(line, sizeof(line), fin) != NULL);
|
||||
}
|
||||
|
||||
/* multipart boundary and transfer encoding are set up for us, and we
|
||||
* are at the end of the sub header. do equivalent of handle_body up
|
||||
* to the next boundary without closing patchfile --- we will expect
|
||||
* that the first part to contain commit message and a patch, and
|
||||
* handle other parts as pure patches.
|
||||
*/
|
||||
static int handle_multipart_one_part(int *seen)
|
||||
{
|
||||
int n = 0;
|
||||
|
||||
while (fgets(line, sizeof(line), fin) != NULL) {
|
||||
again:
|
||||
n++;
|
||||
if (is_multipart_boundary(line))
|
||||
break;
|
||||
if (handle_commit_msg(seen))
|
||||
goto again;
|
||||
handle_patch();
|
||||
break;
|
||||
}
|
||||
if (n == 0)
|
||||
return -1;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void handle_multipart_body(void)
|
||||
{
|
||||
int seen = 0;
|
||||
int part_num = 0;
|
||||
|
||||
/* Skip up to the first boundary */
|
||||
while (fgets(line, sizeof(line), fin) != NULL)
|
||||
if (is_multipart_boundary(line)) {
|
||||
part_num = 1;
|
||||
break;
|
||||
}
|
||||
if (!part_num)
|
||||
return;
|
||||
/* We are on boundary line. Start slurping the subhead. */
|
||||
while (1) {
|
||||
int hdr = read_one_header_line(line, sizeof(line), fin);
|
||||
if (!hdr) {
|
||||
if (handle_multipart_one_part(&seen) < 0)
|
||||
return;
|
||||
/* Reset per part headers */
|
||||
transfer_encoding = TE_DONTCARE;
|
||||
charset[0] = 0;
|
||||
}
|
||||
else
|
||||
check_subheader_line(line);
|
||||
}
|
||||
fclose(patchfile);
|
||||
if (!patch_lines) {
|
||||
fprintf(stderr, "No patch found\n");
|
||||
exit(1);
|
||||
if (!memcmp(header[i], "Subject", 7)) {
|
||||
sub = cleanup_subject(hdr);
|
||||
cleanup_space(sub);
|
||||
fprintf(fout, "Subject: %s\n", sub);
|
||||
} else if (!memcmp(header[i], "From", 4)) {
|
||||
handle_from(hdr);
|
||||
fprintf(fout, "Author: %s\n", name);
|
||||
fprintf(fout, "Email: %s\n", email);
|
||||
} else {
|
||||
cleanup_space(hdr);
|
||||
fprintf(fout, "%s: %s\n", header[i], hdr);
|
||||
}
|
||||
}
|
||||
|
||||
/* Non multipart message */
|
||||
static void handle_body(void)
|
||||
{
|
||||
int seen = 0;
|
||||
|
||||
handle_commit_msg(&seen);
|
||||
handle_patch();
|
||||
fclose(patchfile);
|
||||
if (!patch_lines) {
|
||||
fprintf(stderr, "No patch found\n");
|
||||
exit(1);
|
||||
}
|
||||
fprintf(fout, "\n");
|
||||
}
|
||||
|
||||
int mailinfo(FILE *in, FILE *out, int ks, const char *encoding,
|
||||
@ -809,18 +838,16 @@ int mailinfo(FILE *in, FILE *out, int ks, const char *encoding,
|
||||
fclose(cmitmsg);
|
||||
return -1;
|
||||
}
|
||||
while (1) {
|
||||
int hdr = read_one_header_line(line, sizeof(line), fin);
|
||||
if (!hdr) {
|
||||
if (multipart_boundary[0])
|
||||
handle_multipart_body();
|
||||
else
|
||||
|
||||
p_hdr_data = xcalloc(MAX_HDR_PARSED, sizeof(char *));
|
||||
s_hdr_data = xcalloc(MAX_HDR_PARSED, sizeof(char *));
|
||||
|
||||
/* process the email header */
|
||||
while (read_one_header_line(line, sizeof(line), fin))
|
||||
check_header(line, p_hdr_data);
|
||||
|
||||
handle_body();
|
||||
handle_info();
|
||||
break;
|
||||
}
|
||||
check_header_line(line);
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
@ -290,6 +290,10 @@ do
|
||||
git-mailinfo $keep $utf8 "$dotest/msg" "$dotest/patch" \
|
||||
<"$dotest/$msgnum" >"$dotest/info" ||
|
||||
stop_here $this
|
||||
test -s $dotest/patch || {
|
||||
echo "Patch is empty. Was is split wrong?"
|
||||
stop_here $this
|
||||
}
|
||||
git-stripspace < "$dotest/msg" > "$dotest/msg-clean"
|
||||
;;
|
||||
esac
|
||||
|
||||
@ -77,6 +77,10 @@ do
|
||||
*)
|
||||
git-mailinfo $keep_subject $utf8 \
|
||||
.dotest/msg .dotest/patch <$i >.dotest/info || exit 1
|
||||
test -s $dotest/patch || {
|
||||
echo "Patch is empty. Was is split wrong?"
|
||||
stop_here $this
|
||||
}
|
||||
git-stripspace < .dotest/msg > .dotest/msg-clean
|
||||
;;
|
||||
esac
|
||||
|
||||
@ -73,6 +73,10 @@ mkdir $tmp_dir || exit 2
|
||||
for patch_name in $(cat "$QUILT_PATCHES/series" | grep -v '^#'); do
|
||||
echo $patch_name
|
||||
(cat $QUILT_PATCHES/$patch_name | git-mailinfo "$tmp_msg" "$tmp_patch" > "$tmp_info") || exit 3
|
||||
test -s $dotest/patch || {
|
||||
echo "Patch is empty. Was is split wrong?"
|
||||
stop_here $this
|
||||
}
|
||||
|
||||
# Parse the author information
|
||||
export GIT_AUTHOR_NAME=$(sed -ne 's/Author: //p' "$tmp_info")
|
||||
|
||||
@ -61,7 +61,7 @@ diff --git a/git-cvsimport-script b/git-cvsimport-script
|
||||
push(@old,$fn);
|
||||
|
||||
--
|
||||
David Kågedal
|
||||
David Kågedal
|
||||
-
|
||||
To unsubscribe from this list: send the line "unsubscribe git" in
|
||||
the body of a message to majordomo@vger.kernel.org
|
||||
|
||||
Loading…
Reference in New Issue
Block a user