Make git-mailinfo a builtin

[jc: with a bit of constness tightening]

Signed-off-by: Lukas Sandström <lukass@etek.chalmers.se>
Signed-off-by: Junio C Hamano <junkio@cox.net>

1 files changed, 0 insertions, 831 deletions

diff --git a/mailinfo.c b/mailinfo.c
deleted file mode 100644
index d9b74f30d..000000000
--- a/mailinfo.c
+++ /dev/null
@@ -1,831 +0,0 @@
-/*
- * Another stupid program, this one parsing the headers of an
- * email to figure out authorship and subject
- */
-#define _GNU_SOURCE
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <ctype.h>
-#ifndef NO_ICONV
-#include <iconv.h>
-#endif
-#include "git-compat-util.h"
-#include "cache.h"
-
-static FILE *cmitmsg, *patchfile;
-
-static int keep_subject = 0;
-static char *metainfo_charset = NULL;
-static char line[1000];
-static char date[1000];
-static char name[1000];
-static char email[1000];
-static char subject[1000];
-
-static enum  {
-	TE_DONTCARE, TE_QP, TE_BASE64,
-} transfer_encoding;
-static char charset[256];
-
-static char multipart_boundary[1000];
-static int multipart_boundary_len;
-static int patch_lines = 0;
-
-static char *sanity_check(char *name, char *email)
-{
-	int len = strlen(name);
-	if (len < 3 || len > 60)
-		return email;
-	if (strchr(name, '@') || strchr(name, '<') || strchr(name, '>'))
-		return email;
-	return name;
-}
-
-static int bogus_from(char *line)
-{
-	/* John Doe <johndoe> */
-	char *bra, *ket, *dst, *cp;
-
-	/* This is fallback, so do not bother if we already have an
-	 * e-mail address.
-	 */ 
-	if (*email)
-		return 0;
-
-	bra = strchr(line, '<');
-	if (!bra)
-		return 0;
-	ket = strchr(bra, '>');
-	if (!ket)
-		return 0;
-
-	for (dst = email, cp = bra+1; cp < ket; )
-		*dst++ = *cp++;
-	*dst = 0;
-	for (cp = line; isspace(*cp); cp++)
-		;
-	for (bra--; isspace(*bra); bra--)
-		*bra = 0;
-	cp = sanity_check(cp, email);
-	strcpy(name, cp);
-	return 1;
-}
-
-static int handle_from(char *in_line)
-{
-	char line[1000];
-	char *at;
-	char *dst;
-
-	strcpy(line, in_line);
-	at = strchr(line, '@');
-	if (!at)
-		return bogus_from(line);
-
-	/*
-	 * If we already have one email, don't take any confusing lines
-	 */
-	if (*email && strchr(at+1, '@'))
-		return 0;
-
-	/* Pick up the string around '@', possibly delimited with <>
-	 * pair; that is the email part.  White them out while copying.
-	 */
-	while (at > line) {
-		char c = at[-1];
-		if (isspace(c))
-			break;
-		if (c == '<') {
-			at[-1] = ' ';
-			break;
-		}
-		at--;
-	}
-	dst = email;
-	for (;;) {
-		unsigned char c = *at;
-		if (!c || c == '>' || isspace(c)) {
-			if (c == '>')
-				*at = ' ';
-			break;
-		}
-		*at++ = ' ';
-		*dst++ = c;
-	}
-	*dst++ = 0;
-
-	/* The remainder is name.  It could be "John Doe <john.doe@xz>"
-	 * or "john.doe@xz (John Doe)", but we have whited out the
-	 * email part, so trim from both ends, possibly removing
-	 * the () pair at the end.
-	 */
-	at = line + strlen(line);
-	while (at > line) {
-		unsigned char c = *--at;
-		if (!isspace(c)) {
-			at[(c == ')') ? 0 : 1] = 0;
-			break;
-		}
-	}
-
-	at = line;
-	for (;;) {
-		unsigned char c = *at;
-		if (!c || !isspace(c)) {
-			if (c == '(')
-				at++;
-			break;
-		}
-		at++;
-	}
-	at = sanity_check(at, email);
-	strcpy(name, at);
-	return 1;
-}
-
-static int handle_date(char *line)
-{
-	strcpy(date, line);
-	return 0;
-}
-
-static int handle_subject(char *line)
-{
-	strcpy(subject, line);
-	return 0;
-}
-
-/* NOTE NOTE NOTE.  We do not claim we do full MIME.  We just attempt
- * to have enough heuristics to grok MIME encoded patches often found
- * on our mailing lists.  For example, we do not even treat header lines
- * case insensitively.
- */
-
-static int slurp_attr(const char *line, const char *name, char *attr)
-{
-	char *ends, *ap = strcasestr(line, name);
-	size_t sz;
-
-	if (!ap) {
-		*attr = 0;
-		return 0;
-	}
-	ap += strlen(name);
-	if (*ap == '"') {
-		ap++;
-		ends = "\"";
-	}
-	else
-		ends = "; \t";
-	sz = strcspn(ap, ends);
-	memcpy(attr, ap, sz);
-	attr[sz] = 0;
-	return 1;
-}
-
-static int handle_subcontent_type(char *line)
-{
-	/* We do not want to mess with boundary.  Note that we do not
-	 * handle nested multipart.
-	 */
-	if (strcasestr(line, "boundary=")) {
-		fprintf(stderr, "Not handling nested multipart message.\n");
-		exit(1);
-	}
-	slurp_attr(line, "charset=", charset);
-	if (*charset) {
-		int i, c;
-		for (i = 0; (c = charset[i]) != 0; i++)
-			charset[i] = tolower(c);
-	}
-	return 0;
-}
-
-static int handle_content_type(char *line)
-{
-	*multipart_boundary = 0;
-	if (slurp_attr(line, "boundary=", multipart_boundary + 2)) {
-		memcpy(multipart_boundary, "--", 2);
-		multipart_boundary_len = strlen(multipart_boundary);
-	}
-	slurp_attr(line, "charset=", charset);
-	return 0;
-}
-
-static int handle_content_transfer_encoding(char *line)
-{
-	if (strcasestr(line, "base64"))
-		transfer_encoding = TE_BASE64;
-	else if (strcasestr(line, "quoted-printable"))
-		transfer_encoding = TE_QP;
-	else
-		transfer_encoding = TE_DONTCARE;
-	return 0;
-}
-
-static int is_multipart_boundary(const char *line)
-{
-	return (!memcmp(line, multipart_boundary, multipart_boundary_len));
-}
-
-static int eatspace(char *line)
-{
-	int len = strlen(line);
-	while (len > 0 && isspace(line[len-1]))
-		line[--len] = 0;
-	return len;
-}
-
-#define SEEN_FROM 01
-#define SEEN_DATE 02
-#define SEEN_SUBJECT 04
-#define SEEN_BOGUS_UNIX_FROM 010
-#define SEEN_PREFIX  020
-
-/* First lines of body can have From:, Date:, and Subject: or empty */
-static void handle_inbody_header(int *seen, char *line)
-{
-	if (*seen & SEEN_PREFIX)
-		return;
-	if (isspace(*line)) {
-		char *cp;
-		for (cp = line + 1; *cp; cp++) {
-			if (!isspace(*cp))
-				break;
-		}
-		if (!*cp)
-			return;
-	}
-	if (!memcmp(">From", line, 5) && isspace(line[5])) {
-		if (!(*seen & SEEN_BOGUS_UNIX_FROM)) {
-			*seen |= SEEN_BOGUS_UNIX_FROM;
-			return;
-		}
-	}
-	if (!memcmp("From:", line, 5) && isspace(line[5])) {
-		if (!(*seen & SEEN_FROM) && handle_from(line+6)) {
-			*seen |= SEEN_FROM;
-			return;
-		}
-	}
-	if (!memcmp("Date:", line, 5) && isspace(line[5])) {
-		if (!(*seen & SEEN_DATE)) {
-			handle_date(line+6);
-			*seen |= SEEN_DATE;
-			return;
-		}
-	}
-	if (!memcmp("Subject:", line, 8) && isspace(line[8])) {
-		if (!(*seen & SEEN_SUBJECT)) {
-			handle_subject(line+9);
-			*seen |= SEEN_SUBJECT;
-			return;
-		}
-	}
-	if (!memcmp("[PATCH]", line, 7) && isspace(line[7])) {
-		if (!(*seen & SEEN_SUBJECT)) {
-			handle_subject(line);
-			*seen |= SEEN_SUBJECT;
-			return;
-		}
-	}
-	*seen |= SEEN_PREFIX;
-}
-
-static char *cleanup_subject(char *subject)
-{
-	if (keep_subject)
-		return subject;
-	for (;;) {
-		char *p;
-		int len, remove;
-		switch (*subject) {
-		case 'r': case 'R':
-			if (!memcmp("e:", subject+1, 2)) {
-				subject +=3;
-				continue;
-			}
-			break;
-		case ' ': case '\t': case ':':
-			subject++;
-			continue;
-
-		case '[':
-			p = strchr(subject, ']');
-			if (!p) {
-				subject++;
-				continue;
-			}
-			len = strlen(p);
-			remove = p - subject;
-			if (remove <= len *2) {
-				subject = p+1;
-				continue;
-			}	
-			break;
-		}
-		eatspace(subject);
-		return subject;
-	}
-}			
-
-static void cleanup_space(char *buf)
-{
-	unsigned char c;
-	while ((c = *buf) != 0) {
-		buf++;
-		if (isspace(c)) {
-			buf[-1] = ' ';
-			c = *buf;
-			while (isspace(c)) {
-				int len = strlen(buf);
-				memmove(buf, buf+1, len);
-				c = *buf;
-			}
-		}
-	}
-}
-
-static void decode_header_bq(char *it);
-typedef int (*header_fn_t)(char *);
-struct header_def {
-	const char *name;
-	header_fn_t func;
-	int namelen;
-};
-
-static void check_header(char *line, struct header_def *header)
-{
-	int i;
-
-	if (header[0].namelen <= 0) {
-		for (i = 0; header[i].name; i++)
-			header[i].namelen = strlen(header[i].name);
-	}
-	for (i = 0; header[i].name; i++) {
-		int len = header[i].namelen;
-		if (!strncasecmp(line, header[i].name, len) &&
-		    line[len] == ':' && isspace(line[len + 1])) {
-			/* Unwrap inline B and Q encoding, and optionally
-			 * normalize the meta information to utf8.
-			 */
-			decode_header_bq(line + len + 2);
-			header[i].func(line + len + 2);
-			break;
-		}
-	}
-}
-
-static void check_subheader_line(char *line)
-{
-	static struct header_def header[] = {
-		{ "Content-Type", handle_subcontent_type },
-		{ "Content-Transfer-Encoding",
-		  handle_content_transfer_encoding },
-		{ NULL },
-	};
-	check_header(line, header);
-}
-static void check_header_line(char *line)
-{
-	static struct header_def header[] = {
-		{ "From", handle_from },
-		{ "Date", handle_date },
-		{ "Subject", handle_subject },
-		{ "Content-Type", handle_content_type },
-		{ "Content-Transfer-Encoding",
-		  handle_content_transfer_encoding },
-		{ NULL },
-	};
-	check_header(line, header);
-}
-
-static int is_rfc2822_header(char *line)
-{
-	/*
-	 * The section that defines the loosest possible
-	 * field name is "3.6.8 Optional fields".
-	 *
-	 * optional-field = field-name ":" unstructured CRLF
-	 * field-name = 1*ftext
-	 * ftext = %d33-57 / %59-126
-	 */
-	int ch;
-	char *cp = line;
-	while ((ch = *cp++)) {
-		if (ch == ':')
-			return cp != line;
-		if ((33 <= ch && ch <= 57) ||
-		    (59 <= ch && ch <= 126))
-			continue;
-		break;
-	}
-	return 0;
-}
-
-static int read_one_header_line(char *line, int sz, FILE *in)
-{
-	int ofs = 0;
-	while (ofs < sz) {
-		int peek, len;
-		if (fgets(line + ofs, sz - ofs, in) == NULL)
-			break;
-		len = eatspace(line + ofs);
-		if ((len == 0) || !is_rfc2822_header(line)) {
-			/* Re-add the newline */
-			line[ofs + len] = '\n';
-			line[ofs + len + 1] = '\0';
-			break;
-		}
-		ofs += len;
-		/* Yuck, 2822 header "folding" */
-		peek = fgetc(in); ungetc(peek, in);
-		if (peek != ' ' && peek != '\t')
-			break;
-	}
-	/* Count mbox From headers as headers */
-	if (!ofs && !memcmp(line, "From ", 5))
-		ofs = 1;
-	return ofs;
-}
-
-static unsigned hexval(int c)
-{
-	if (c >= '0' && c <= '9')
-		return c - '0';
-	if (c >= 'a' && c <= 'f')
-		return c - 'a' + 10;
-	if (c >= 'A' && c <= 'F')
-		return c - 'A' + 10;
-	return ~0;
-}
-
-static int decode_q_segment(char *in, char *ot, char *ep, int rfc2047)
-{
-	int c;
-	while ((c = *in++) != 0 && (in <= ep)) {
-		if (c == '=') {
-			int d = *in++;
-			if (d == '\n' || !d)
-				break; /* drop trailing newline */
-			*ot++ = ((hexval(d) << 4) | hexval(*in++));
-			continue;
-		}
-		if (rfc2047 && c == '_') /* rfc2047 4.2 (2) */
-			c = 0x20;
-		*ot++ = c;
-	}
-	*ot = 0;
-	return 0;
-}
-
-static int decode_b_segment(char *in, char *ot, char *ep)
-{
-	/* Decode in..ep, possibly in-place to ot */
-	int c, pos = 0, acc = 0;
-
-	while ((c = *in++) != 0 && (in <= ep)) {
-		if (c == '+')
-			c = 62;
-		else if (c == '/')
-			c = 63;
-		else if ('A' <= c && c <= 'Z')
-			c -= 'A';
-		else if ('a' <= c && c <= 'z')
-			c -= 'a' - 26;
-		else if ('0' <= c && c <= '9')
-			c -= '0' - 52;
-		else if (c == '=') {
-			/* padding is almost like (c == 0), except we do
-			 * not output NUL resulting only from it;
-			 * for now we just trust the data.
-			 */
-			c = 0;
-		}
-		else
-			continue; /* garbage */
-		switch (pos++) {
-		case 0:
-			acc = (c << 2);
-			break;
-		case 1:
-			*ot++ = (acc | (c >> 4));
-			acc = (c & 15) << 4;
-			break;
-		case 2:
-			*ot++ = (acc | (c >> 2));
-			acc = (c & 3) << 6;
-			break;
-		case 3:
-			*ot++ = (acc | c);
-			acc = pos = 0;
-			break;
-		}
-	}
-	*ot = 0;
-	return 0;
-}
-
-static void convert_to_utf8(char *line, char *charset)
-{
-#ifndef NO_ICONV
-	char *in, *out;
-	size_t insize, outsize, nrc;
-	char outbuf[4096]; /* cheat */
-	static char latin_one[] = "latin1";
-	char *input_charset = *charset ? charset : latin_one;
-	iconv_t conv = iconv_open(metainfo_charset, input_charset);
-
-	if (conv == (iconv_t) -1) {
-		static int warned_latin1_once = 0;
-		if (input_charset != latin_one) {
-			fprintf(stderr, "cannot convert from %s to %s\n",
-				input_charset, metainfo_charset);
-			*charset = 0;
-		}
-		else if (!warned_latin1_once) {
-			warned_latin1_once = 1;
-			fprintf(stderr, "tried to convert from %s to %s, "
-				"but your iconv does not work with it.\n",
-				input_charset, metainfo_charset);
-		}
-		return;
-	}
-	in = line;
-	insize = strlen(in);
-	out = outbuf;
-	outsize = sizeof(outbuf);
-	nrc = iconv(conv, &in, &insize, &out, &outsize);
-	iconv_close(conv);
-	if (nrc == (size_t) -1)
-		return;
-	*out = 0;
-	strcpy(line, outbuf);
-#endif
-}
-
-static void decode_header_bq(char *it)
-{
-	char *in, *out, *ep, *cp, *sp;
-	char outbuf[1000];
-
-	in = it;
-	out = outbuf;
-	while ((ep = strstr(in, "=?")) != NULL) {
-		int sz, encoding;
-		char charset_q[256], piecebuf[256];
-		if (in != ep) {
-			sz = ep - in;
-			memcpy(out, in, sz);
-			out += sz;
-			in += sz;
-		}
-		/* E.g.
-		 * ep : "=?iso-2022-jp?B?GyR...?= foo"
-		 * ep : "=?ISO-8859-1?Q?Foo=FCbar?= baz"
-		 */
-		ep += 2;
-		cp = strchr(ep, '?');
-		if (!cp)
-			return; /* no munging */
-		for (sp = ep; sp < cp; sp++)
-			charset_q[sp - ep] = tolower(*sp);
-		charset_q[cp - ep] = 0;
-		encoding = cp[1];
-		if (!encoding || cp[2] != '?')
-			return; /* no munging */
-		ep = strstr(cp + 3, "?=");
-		if (!ep)
-			return; /* no munging */
-		switch (tolower(encoding)) {
-		default:
-			return; /* no munging */
-		case 'b':
-			sz = decode_b_segment(cp + 3, piecebuf, ep);
-			break;
-		case 'q':
-			sz = decode_q_segment(cp + 3, piecebuf, ep, 1);
-			break;
-		}
-		if (sz < 0)
-			return;
-		if (metainfo_charset)
-			convert_to_utf8(piecebuf, charset_q);
-		strcpy(out, piecebuf);
-		out += strlen(out);
-		in = ep + 2;
-	}
-	strcpy(out, in);
-	strcpy(it, outbuf);
-}
-
-static void decode_transfer_encoding(char *line)
-{
-	char *ep;
-
-	switch (transfer_encoding) {
-	case TE_QP:
-		ep = line + strlen(line);
-		decode_q_segment(line, line, ep, 0);
-		break;
-	case TE_BASE64:
-		ep = line + strlen(line);
-		decode_b_segment(line, line, ep);
-		break;
-	case TE_DONTCARE:
-		break;
-	}
-}
-
-static void handle_info(void)
-{
-	char *sub;
-
-	sub = cleanup_subject(subject);
-	cleanup_space(name);
-	cleanup_space(date);
-	cleanup_space(email);
-	cleanup_space(sub);
-
-	printf("Author: %s\nEmail: %s\nSubject: %s\nDate: %s\n\n",
-	       name, email, sub, date);
-}
-
-/* We are inside message body and have read line[] already.
- * Spit out the commit log.
- */
-static int handle_commit_msg(int *seen)
-{
-	if (!cmitmsg)
-		return 0;
-	do {
-		if (!memcmp("diff -", line, 6) ||
-		    !memcmp("---", line, 3) ||
-		    !memcmp("Index: ", line, 7))
-			break;
-		if ((multipart_boundary[0] && is_multipart_boundary(line))) {
-			/* We come here when the first part had only
-			 * the commit message without any patch.  We
-			 * pretend we have not seen this line yet, and
-			 * go back to the loop.
-			 */
-			return 1;
-		}
-
-		/* Unwrap transfer encoding and optionally
-		 * normalize the log message to UTF-8.
-		 */
-		decode_transfer_encoding(line);
-		if (metainfo_charset)
-			convert_to_utf8(line, charset);
-
-		handle_inbody_header(seen, line);
-		if (!(*seen & SEEN_PREFIX))
-			continue;
-
-		fputs(line, cmitmsg);
-	} while (fgets(line, sizeof(line), stdin) != NULL);
-	fclose(cmitmsg);
-	cmitmsg = NULL;
-	return 0;
-}
-
-/* We have done the commit message and have the first
- * line of the patch in line[].
- */
-static void handle_patch(void)
-{
-	do {
-		if (multipart_boundary[0] && is_multipart_boundary(line))
-			break;
-		/* Only unwrap transfer encoding but otherwise do not
-		 * do anything.  We do *NOT* want UTF-8 conversion
-		 * here; we are dealing with the user payload.
-		 */
-		decode_transfer_encoding(line);
-		fputs(line, patchfile);
-		patch_lines++;
-	} while (fgets(line, sizeof(line), stdin) != NULL);
-}
-
-/* multipart boundary and transfer encoding are set up for us, and we
- * are at the end of the sub header.  do equivalent of handle_body up
- * to the next boundary without closing patchfile --- we will expect
- * that the first part to contain commit message and a patch, and
- * handle other parts as pure patches.
- */
-static int handle_multipart_one_part(int *seen)
-{
-	int n = 0;
-
-	while (fgets(line, sizeof(line), stdin) != NULL) {
-	again:
-		n++;
-		if (is_multipart_boundary(line))
-			break;
-		if (handle_commit_msg(seen))
-			goto again;
-		handle_patch();
-		break;
-	}
-	if (n == 0)
-		return -1;
-	return 0;
-}
-
-static void handle_multipart_body(void)
-{
-	int seen = 0;
-	int part_num = 0;
-
-	/* Skip up to the first boundary */
-	while (fgets(line, sizeof(line), stdin) != NULL)
-		if (is_multipart_boundary(line)) {
-			part_num = 1;
-			break;
-		}
-	if (!part_num)
-		return;
-	/* We are on boundary line.  Start slurping the subhead. */
-	while (1) {
-		int hdr = read_one_header_line(line, sizeof(line), stdin);
-		if (!hdr) {
-			if (handle_multipart_one_part(&seen) < 0)
-				return;
-			/* Reset per part headers */
-			transfer_encoding = TE_DONTCARE;
-			charset[0] = 0;
-		}
-		else
-			check_subheader_line(line);
-	}
-	fclose(patchfile);
-	if (!patch_lines) {
-		fprintf(stderr, "No patch found\n");
-		exit(1);
-	}
-}
-
-/* Non multipart message */
-static void handle_body(void)
-{
-	int seen = 0;
-
-	handle_commit_msg(&seen);
-	handle_patch();
-	fclose(patchfile);
-	if (!patch_lines) {
-		fprintf(stderr, "No patch found\n");
-		exit(1);
-	}
-}
-
-static const char mailinfo_usage[] =
-	"git-mailinfo [-k] [-u | --encoding=<encoding>] msg patch <mail >info";
-
-int main(int argc, char **argv)
-{
-	/* NEEDSWORK: might want to do the optional .git/ directory
-	 * discovery
-	 */
-	git_config(git_default_config);
-
-	while (1 < argc && argv[1][0] == '-') {
-		if (!strcmp(argv[1], "-k"))
-			keep_subject = 1;
-		else if (!strcmp(argv[1], "-u"))
-			metainfo_charset = git_commit_encoding;
-		else if (!strncmp(argv[1], "--encoding=", 11))
-			metainfo_charset = argv[1] + 11;
-		else
-			usage(mailinfo_usage);
-		argc--; argv++;
-	}
-
-	if (argc != 3)
-		usage(mailinfo_usage);
-	cmitmsg = fopen(argv[1], "w");
-	if (!cmitmsg) {
-		perror(argv[1]);
-		exit(1);
-	}
-	patchfile = fopen(argv[2], "w");
-	if (!patchfile) {
-		perror(argv[2]);
-		exit(1);
-	}
-	while (1) {
-		int hdr = read_one_header_line(line, sizeof(line), stdin);
-		if (!hdr) {
-			if (multipart_boundary[0])
-				handle_multipart_body();
-			else
-				handle_body();
-			handle_info();
-			break;
-		}
-		check_header_line(line);
-	}
-	return 0;
-}