Revision 5580b271af518bae30148edfd42cc8459d8da384 authored by Junio C Hamano on 10 June 2016, 17:58:55 UTC, committed by Junio C Hamano on 10 June 2016, 20:45:23 UTC
http://lkml.kernel.org/g/20160610075043.GA13411@sigill.intra.peff.net reports that a change to add a new "function" with common ending with the existing one at the end of the file is shown like this: def foo do_foo_stuff() + common_ending() +end + +def bar + do_bar_stuff() + common_ending() end when the new heuristic is in use. In reality, the change is to add the blank line before "def bar" and everything below, which is what the code without the new heuristic shows. Disable the heuristics by default, and resurrect the documentation for the option and the configuration variables, while clearly marking the feature as still experimental. Signed-off-by: Junio C Hamano <gitster@pobox.com>
1 parent 77085a6
ident.c
/*
* ident.c
*
* create git identifier lines of the form "name <email> date"
*
* Copyright (C) 2005 Linus Torvalds
*/
#include "cache.h"
static struct strbuf git_default_name = STRBUF_INIT;
static struct strbuf git_default_email = STRBUF_INIT;
static struct strbuf git_default_date = STRBUF_INIT;
#define IDENT_NAME_GIVEN 01
#define IDENT_MAIL_GIVEN 02
#define IDENT_ALL_GIVEN (IDENT_NAME_GIVEN|IDENT_MAIL_GIVEN)
static int committer_ident_explicitly_given;
static int author_ident_explicitly_given;
#ifdef NO_GECOS_IN_PWENT
#define get_gecos(ignored) "&"
#else
#define get_gecos(struct_passwd) ((struct_passwd)->pw_gecos)
#endif
static void copy_gecos(const struct passwd *w, struct strbuf *name)
{
char *src;
/* Traditionally GECOS field had office phone numbers etc, separated
* with commas. Also & stands for capitalized form of the login name.
*/
for (src = get_gecos(w); *src && *src != ','; src++) {
int ch = *src;
if (ch != '&')
strbuf_addch(name, ch);
else {
/* Sorry, Mr. McDonald... */
strbuf_addch(name, toupper(*w->pw_name));
strbuf_addstr(name, w->pw_name + 1);
}
}
}
static int add_mailname_host(struct strbuf *buf)
{
FILE *mailname;
struct strbuf mailnamebuf = STRBUF_INIT;
mailname = fopen("/etc/mailname", "r");
if (!mailname) {
if (errno != ENOENT)
warning("cannot open /etc/mailname: %s",
strerror(errno));
return -1;
}
if (strbuf_getline(&mailnamebuf, mailname, '\n') == EOF) {
if (ferror(mailname))
warning("cannot read /etc/mailname: %s",
strerror(errno));
strbuf_release(&mailnamebuf);
fclose(mailname);
return -1;
}
/* success! */
strbuf_addbuf(buf, &mailnamebuf);
strbuf_release(&mailnamebuf);
fclose(mailname);
return 0;
}
static void add_domainname(struct strbuf *out)
{
char buf[1024];
struct hostent *he;
if (gethostname(buf, sizeof(buf))) {
warning("cannot get host name: %s", strerror(errno));
strbuf_addstr(out, "(none)");
return;
}
if (strchr(buf, '.'))
strbuf_addstr(out, buf);
else if ((he = gethostbyname(buf)) && strchr(he->h_name, '.'))
strbuf_addstr(out, he->h_name);
else
strbuf_addf(out, "%s.(none)", buf);
}
static void copy_email(const struct passwd *pw, struct strbuf *email)
{
/*
* Make up a fake email address
* (name + '@' + hostname [+ '.' + domainname])
*/
strbuf_addstr(email, pw->pw_name);
strbuf_addch(email, '@');
if (!add_mailname_host(email))
return; /* read from "/etc/mailname" (Debian) */
add_domainname(email);
}
const char *ident_default_name(void)
{
if (!git_default_name.len) {
copy_gecos(xgetpwuid_self(), &git_default_name);
strbuf_trim(&git_default_name);
}
return git_default_name.buf;
}
const char *ident_default_email(void)
{
if (!git_default_email.len) {
const char *email = getenv("EMAIL");
if (email && email[0]) {
strbuf_addstr(&git_default_email, email);
committer_ident_explicitly_given |= IDENT_MAIL_GIVEN;
author_ident_explicitly_given |= IDENT_MAIL_GIVEN;
} else
copy_email(xgetpwuid_self(), &git_default_email);
strbuf_trim(&git_default_email);
}
return git_default_email.buf;
}
static const char *ident_default_date(void)
{
if (!git_default_date.len)
datestamp(&git_default_date);
return git_default_date.buf;
}
static int crud(unsigned char c)
{
return c <= 32 ||
c == '.' ||
c == ',' ||
c == ':' ||
c == ';' ||
c == '<' ||
c == '>' ||
c == '"' ||
c == '\\' ||
c == '\'';
}
/*
* Copy over a string to the destination, but avoid special
* characters ('\n', '<' and '>') and remove crud at the end
*/
static void strbuf_addstr_without_crud(struct strbuf *sb, const char *src)
{
size_t i, len;
unsigned char c;
/* Remove crud from the beginning.. */
while ((c = *src) != 0) {
if (!crud(c))
break;
src++;
}
/* Remove crud from the end.. */
len = strlen(src);
while (len > 0) {
c = src[len-1];
if (!crud(c))
break;
--len;
}
/*
* Copy the rest to the buffer, but avoid the special
* characters '\n' '<' and '>' that act as delimiters on
* an identification line. We can only remove crud, never add it,
* so 'len' is our maximum.
*/
strbuf_grow(sb, len);
for (i = 0; i < len; i++) {
c = *src++;
switch (c) {
case '\n': case '<': case '>':
continue;
}
sb->buf[sb->len++] = c;
}
sb->buf[sb->len] = '\0';
}
/*
* Reverse of fmt_ident(); given an ident line, split the fields
* to allow the caller to parse it.
* Signal a success by returning 0, but date/tz fields of the result
* can still be NULL if the input line only has the name/email part
* (e.g. reading from a reflog entry).
*/
int split_ident_line(struct ident_split *split, const char *line, int len)
{
const char *cp;
size_t span;
int status = -1;
memset(split, 0, sizeof(*split));
split->name_begin = line;
for (cp = line; *cp && cp < line + len; cp++)
if (*cp == '<') {
split->mail_begin = cp + 1;
break;
}
if (!split->mail_begin)
return status;
for (cp = split->mail_begin - 2; line <= cp; cp--)
if (!isspace(*cp)) {
split->name_end = cp + 1;
break;
}
if (!split->name_end) {
/* no human readable name */
split->name_end = split->name_begin;
}
for (cp = split->mail_begin; cp < line + len; cp++)
if (*cp == '>') {
split->mail_end = cp;
break;
}
if (!split->mail_end)
return status;
/*
* Look from the end-of-line to find the trailing ">" of the mail
* address, even though we should already know it as split->mail_end.
* This can help in cases of broken idents with an extra ">" somewhere
* in the email address. Note that we are assuming the timestamp will
* never have a ">" in it.
*
* Note that we will always find some ">" before going off the front of
* the string, because will always hit the split->mail_end closing
* bracket.
*/
for (cp = line + len - 1; *cp != '>'; cp--)
;
for (cp = cp + 1; cp < line + len && isspace(*cp); cp++)
;
if (line + len <= cp)
goto person_only;
split->date_begin = cp;
span = strspn(cp, "0123456789");
if (!span)
goto person_only;
split->date_end = split->date_begin + span;
for (cp = split->date_end; cp < line + len && isspace(*cp); cp++)
;
if (line + len <= cp || (*cp != '+' && *cp != '-'))
goto person_only;
split->tz_begin = cp;
span = strspn(cp + 1, "0123456789");
if (!span)
goto person_only;
split->tz_end = split->tz_begin + 1 + span;
return 0;
person_only:
split->date_begin = NULL;
split->date_end = NULL;
split->tz_begin = NULL;
split->tz_end = NULL;
return 0;
}
static const char *env_hint =
"\n"
"*** Please tell me who you are.\n"
"\n"
"Run\n"
"\n"
" git config --global user.email \"you@example.com\"\n"
" git config --global user.name \"Your Name\"\n"
"\n"
"to set your account\'s default identity.\n"
"Omit --global to set the identity only in this repository.\n"
"\n";
const char *fmt_ident(const char *name, const char *email,
const char *date_str, int flag)
{
static struct strbuf ident = STRBUF_INIT;
int strict = (flag & IDENT_STRICT);
int want_date = !(flag & IDENT_NO_DATE);
int want_name = !(flag & IDENT_NO_NAME);
if (want_name && !name)
name = ident_default_name();
if (!email)
email = ident_default_email();
if (want_name && !*name) {
struct passwd *pw;
if (strict) {
if (name == git_default_name.buf)
fputs(env_hint, stderr);
die("empty ident name (for <%s>) not allowed", email);
}
pw = xgetpwuid_self();
name = pw->pw_name;
}
if (strict && email == git_default_email.buf &&
strstr(email, "(none)")) {
fputs(env_hint, stderr);
die("unable to auto-detect email address (got '%s')", email);
}
strbuf_reset(&ident);
if (want_name) {
strbuf_addstr_without_crud(&ident, name);
strbuf_addstr(&ident, " <");
}
strbuf_addstr_without_crud(&ident, email);
if (want_name)
strbuf_addch(&ident, '>');
if (want_date) {
strbuf_addch(&ident, ' ');
if (date_str && date_str[0]) {
if (parse_date(date_str, &ident) < 0)
die("invalid date format: %s", date_str);
}
else
strbuf_addstr(&ident, ident_default_date());
}
return ident.buf;
}
const char *fmt_name(const char *name, const char *email)
{
return fmt_ident(name, email, NULL, IDENT_STRICT | IDENT_NO_DATE);
}
const char *git_author_info(int flag)
{
if (getenv("GIT_AUTHOR_NAME"))
author_ident_explicitly_given |= IDENT_NAME_GIVEN;
if (getenv("GIT_AUTHOR_EMAIL"))
author_ident_explicitly_given |= IDENT_MAIL_GIVEN;
return fmt_ident(getenv("GIT_AUTHOR_NAME"),
getenv("GIT_AUTHOR_EMAIL"),
getenv("GIT_AUTHOR_DATE"),
flag);
}
const char *git_committer_info(int flag)
{
if (getenv("GIT_COMMITTER_NAME"))
committer_ident_explicitly_given |= IDENT_NAME_GIVEN;
if (getenv("GIT_COMMITTER_EMAIL"))
committer_ident_explicitly_given |= IDENT_MAIL_GIVEN;
return fmt_ident(getenv("GIT_COMMITTER_NAME"),
getenv("GIT_COMMITTER_EMAIL"),
getenv("GIT_COMMITTER_DATE"),
flag);
}
static int ident_is_sufficient(int user_ident_explicitly_given)
{
#ifndef WINDOWS
return (user_ident_explicitly_given & IDENT_MAIL_GIVEN);
#else
return (user_ident_explicitly_given == IDENT_ALL_GIVEN);
#endif
}
int committer_ident_sufficiently_given(void)
{
return ident_is_sufficient(committer_ident_explicitly_given);
}
int author_ident_sufficiently_given(void)
{
return ident_is_sufficient(author_ident_explicitly_given);
}
int git_ident_config(const char *var, const char *value, void *data)
{
if (!strcmp(var, "user.name")) {
if (!value)
return config_error_nonbool(var);
strbuf_reset(&git_default_name);
strbuf_addstr(&git_default_name, value);
committer_ident_explicitly_given |= IDENT_NAME_GIVEN;
author_ident_explicitly_given |= IDENT_NAME_GIVEN;
return 0;
}
if (!strcmp(var, "user.email")) {
if (!value)
return config_error_nonbool(var);
strbuf_reset(&git_default_email);
strbuf_addstr(&git_default_email, value);
committer_ident_explicitly_given |= IDENT_MAIL_GIVEN;
author_ident_explicitly_given |= IDENT_MAIL_GIVEN;
return 0;
}
return 0;
}
static int buf_cmp(const char *a_begin, const char *a_end,
const char *b_begin, const char *b_end)
{
int a_len = a_end - a_begin;
int b_len = b_end - b_begin;
int min = a_len < b_len ? a_len : b_len;
int cmp;
cmp = memcmp(a_begin, b_begin, min);
if (cmp)
return cmp;
return a_len - b_len;
}
int ident_cmp(const struct ident_split *a,
const struct ident_split *b)
{
int cmp;
cmp = buf_cmp(a->mail_begin, a->mail_end,
b->mail_begin, b->mail_end);
if (cmp)
return cmp;
return buf_cmp(a->name_begin, a->name_end,
b->name_begin, b->name_end);
}
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