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![Ævar Arnfjörð Bjarmason](/assets/img/avatar_default.png)
As reported in [1] the "UNUSED(var)" macro introduced in2174b8c75d
(Merge branch 'jk/unused-annotation' into next, 2022-08-24) breaks coccinelle's parsing of our sources in files where it occurs. Let's instead partially go with the approach suggested in [2] of making this not take an argument. As noted in [1] "coccinelle" will ignore such tokens in argument lists that it doesn't know about, and it's less of a surprise to syntax highlighters. This undoes the "help us notice when a parameter marked as unused is actually use" part of9b24034754
(git-compat-util: add UNUSED macro, 2022-08-19), a subsequent commit will further tweak the macro to implement a replacement for that functionality. 1. https://lore.kernel.org/git/220825.86ilmg4mil.gmgdl@evledraar.gmail.com/ 2. https://lore.kernel.org/git/220819.868rnk54ju.gmgdl@evledraar.gmail.com/ Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
729 lines
18 KiB
C
729 lines
18 KiB
C
/*
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* ident.c
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*
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* create git identifier lines of the form "name <email> date"
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*
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* Copyright (C) 2005 Linus Torvalds
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*/
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#include "cache.h"
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#include "config.h"
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#include "date.h"
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#include "mailmap.h"
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static struct strbuf git_default_name = STRBUF_INIT;
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static struct strbuf git_default_email = STRBUF_INIT;
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static struct strbuf git_default_date = STRBUF_INIT;
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static struct strbuf git_author_name = STRBUF_INIT;
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static struct strbuf git_author_email = STRBUF_INIT;
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static struct strbuf git_committer_name = STRBUF_INIT;
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static struct strbuf git_committer_email = STRBUF_INIT;
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static int default_email_is_bogus;
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static int default_name_is_bogus;
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static int ident_use_config_only;
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#define IDENT_NAME_GIVEN 01
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#define IDENT_MAIL_GIVEN 02
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#define IDENT_ALL_GIVEN (IDENT_NAME_GIVEN|IDENT_MAIL_GIVEN)
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static int committer_ident_explicitly_given;
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static int author_ident_explicitly_given;
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static int ident_config_given;
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#ifdef NO_GECOS_IN_PWENT
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#define get_gecos(ignored) "&"
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#else
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#define get_gecos(struct_passwd) ((struct_passwd)->pw_gecos)
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#endif
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static struct passwd *xgetpwuid_self(int *is_bogus)
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{
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struct passwd *pw;
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errno = 0;
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pw = getpwuid(getuid());
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if (!pw) {
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static struct passwd fallback;
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fallback.pw_name = "unknown";
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#ifndef NO_GECOS_IN_PWENT
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fallback.pw_gecos = "Unknown";
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#endif
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pw = &fallback;
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if (is_bogus)
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*is_bogus = 1;
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}
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return pw;
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}
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static void copy_gecos(const struct passwd *w, struct strbuf *name)
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{
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char *src;
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/* Traditionally GECOS field had office phone numbers etc, separated
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* with commas. Also & stands for capitalized form of the login name.
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*/
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for (src = get_gecos(w); *src && *src != ','; src++) {
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int ch = *src;
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if (ch != '&')
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strbuf_addch(name, ch);
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else {
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/* Sorry, Mr. McDonald... */
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strbuf_addch(name, toupper(*w->pw_name));
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strbuf_addstr(name, w->pw_name + 1);
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}
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}
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}
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static int add_mailname_host(struct strbuf *buf)
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{
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FILE *mailname;
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struct strbuf mailnamebuf = STRBUF_INIT;
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mailname = fopen_or_warn("/etc/mailname", "r");
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if (!mailname)
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return -1;
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if (strbuf_getline(&mailnamebuf, mailname) == EOF) {
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if (ferror(mailname))
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warning_errno("cannot read /etc/mailname");
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strbuf_release(&mailnamebuf);
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fclose(mailname);
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return -1;
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}
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/* success! */
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strbuf_addbuf(buf, &mailnamebuf);
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strbuf_release(&mailnamebuf);
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fclose(mailname);
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return 0;
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}
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static int canonical_name(const char *host, struct strbuf *out)
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{
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int status = -1;
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#ifndef NO_IPV6
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struct addrinfo hints, *ai;
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memset (&hints, '\0', sizeof (hints));
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hints.ai_flags = AI_CANONNAME;
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if (!getaddrinfo(host, NULL, &hints, &ai)) {
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if (ai && ai->ai_canonname && strchr(ai->ai_canonname, '.')) {
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strbuf_addstr(out, ai->ai_canonname);
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status = 0;
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}
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freeaddrinfo(ai);
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}
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#else
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struct hostent *he = gethostbyname(host);
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if (he && strchr(he->h_name, '.')) {
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strbuf_addstr(out, he->h_name);
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status = 0;
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}
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#endif /* NO_IPV6 */
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return status;
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}
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static void add_domainname(struct strbuf *out, int *is_bogus)
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{
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char buf[HOST_NAME_MAX + 1];
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if (xgethostname(buf, sizeof(buf))) {
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warning_errno("cannot get host name");
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strbuf_addstr(out, "(none)");
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*is_bogus = 1;
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return;
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}
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if (strchr(buf, '.'))
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strbuf_addstr(out, buf);
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else if (canonical_name(buf, out) < 0) {
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strbuf_addf(out, "%s.(none)", buf);
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*is_bogus = 1;
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}
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}
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static void copy_email(const struct passwd *pw, struct strbuf *email,
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int *is_bogus)
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{
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/*
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* Make up a fake email address
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* (name + '@' + hostname [+ '.' + domainname])
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*/
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strbuf_addstr(email, pw->pw_name);
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strbuf_addch(email, '@');
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if (!add_mailname_host(email))
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return; /* read from "/etc/mailname" (Debian) */
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add_domainname(email, is_bogus);
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}
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const char *ident_default_name(void)
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{
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if (!(ident_config_given & IDENT_NAME_GIVEN) && !git_default_name.len) {
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copy_gecos(xgetpwuid_self(&default_name_is_bogus), &git_default_name);
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strbuf_trim(&git_default_name);
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}
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return git_default_name.buf;
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}
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const char *ident_default_email(void)
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{
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if (!(ident_config_given & IDENT_MAIL_GIVEN) && !git_default_email.len) {
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const char *email = getenv("EMAIL");
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if (email && email[0]) {
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strbuf_addstr(&git_default_email, email);
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committer_ident_explicitly_given |= IDENT_MAIL_GIVEN;
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author_ident_explicitly_given |= IDENT_MAIL_GIVEN;
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} else if ((email = query_user_email()) && email[0]) {
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strbuf_addstr(&git_default_email, email);
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free((char *)email);
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} else
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copy_email(xgetpwuid_self(&default_email_is_bogus),
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&git_default_email, &default_email_is_bogus);
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strbuf_trim(&git_default_email);
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}
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return git_default_email.buf;
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}
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static const char *ident_default_date(void)
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{
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if (!git_default_date.len)
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datestamp(&git_default_date);
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return git_default_date.buf;
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}
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void reset_ident_date(void)
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{
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strbuf_reset(&git_default_date);
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}
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static int crud(unsigned char c)
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{
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return c <= 32 ||
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c == '.' ||
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c == ',' ||
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c == ':' ||
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c == ';' ||
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c == '<' ||
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c == '>' ||
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c == '"' ||
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c == '\\' ||
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c == '\'';
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}
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static int has_non_crud(const char *str)
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{
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for (; *str; str++) {
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if (!crud(*str))
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return 1;
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}
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return 0;
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}
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/*
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* Copy over a string to the destination, but avoid special
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* characters ('\n', '<' and '>') and remove crud at the end
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*/
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static void strbuf_addstr_without_crud(struct strbuf *sb, const char *src)
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{
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size_t i, len;
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unsigned char c;
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/* Remove crud from the beginning.. */
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while ((c = *src) != 0) {
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if (!crud(c))
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break;
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src++;
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}
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/* Remove crud from the end.. */
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len = strlen(src);
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while (len > 0) {
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c = src[len-1];
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if (!crud(c))
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break;
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--len;
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}
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/*
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* Copy the rest to the buffer, but avoid the special
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* characters '\n' '<' and '>' that act as delimiters on
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* an identification line. We can only remove crud, never add it,
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* so 'len' is our maximum.
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*/
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strbuf_grow(sb, len);
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for (i = 0; i < len; i++) {
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c = *src++;
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switch (c) {
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case '\n': case '<': case '>':
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continue;
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}
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sb->buf[sb->len++] = c;
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}
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sb->buf[sb->len] = '\0';
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}
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/*
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* Reverse of fmt_ident(); given an ident line, split the fields
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* to allow the caller to parse it.
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* Signal a success by returning 0, but date/tz fields of the result
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* can still be NULL if the input line only has the name/email part
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* (e.g. reading from a reflog entry).
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*/
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int split_ident_line(struct ident_split *split, const char *line, int len)
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{
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const char *cp;
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size_t span;
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int status = -1;
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memset(split, 0, sizeof(*split));
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split->name_begin = line;
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for (cp = line; *cp && cp < line + len; cp++)
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if (*cp == '<') {
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split->mail_begin = cp + 1;
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break;
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}
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if (!split->mail_begin)
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return status;
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for (cp = split->mail_begin - 2; line <= cp; cp--)
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if (!isspace(*cp)) {
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split->name_end = cp + 1;
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break;
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}
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if (!split->name_end) {
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/* no human readable name */
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split->name_end = split->name_begin;
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}
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for (cp = split->mail_begin; cp < line + len; cp++)
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if (*cp == '>') {
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split->mail_end = cp;
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break;
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}
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if (!split->mail_end)
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return status;
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/*
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* Look from the end-of-line to find the trailing ">" of the mail
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* address, even though we should already know it as split->mail_end.
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* This can help in cases of broken idents with an extra ">" somewhere
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* in the email address. Note that we are assuming the timestamp will
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* never have a ">" in it.
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*
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* Note that we will always find some ">" before going off the front of
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* the string, because will always hit the split->mail_end closing
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* bracket.
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*/
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for (cp = line + len - 1; *cp != '>'; cp--)
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;
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for (cp = cp + 1; cp < line + len && isspace(*cp); cp++)
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;
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if (line + len <= cp)
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goto person_only;
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split->date_begin = cp;
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span = strspn(cp, "0123456789");
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if (!span)
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goto person_only;
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split->date_end = split->date_begin + span;
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for (cp = split->date_end; cp < line + len && isspace(*cp); cp++)
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;
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if (line + len <= cp || (*cp != '+' && *cp != '-'))
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goto person_only;
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split->tz_begin = cp;
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span = strspn(cp + 1, "0123456789");
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if (!span)
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goto person_only;
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split->tz_end = split->tz_begin + 1 + span;
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return 0;
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person_only:
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split->date_begin = NULL;
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split->date_end = NULL;
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split->tz_begin = NULL;
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split->tz_end = NULL;
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return 0;
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}
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/*
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* Returns the difference between the new and old length of the ident line.
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*/
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static ssize_t rewrite_ident_line(const char *person, size_t len,
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struct strbuf *buf,
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struct string_list *mailmap)
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{
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size_t namelen, maillen;
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const char *name;
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const char *mail;
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struct ident_split ident;
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if (split_ident_line(&ident, person, len))
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return 0;
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mail = ident.mail_begin;
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maillen = ident.mail_end - ident.mail_begin;
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name = ident.name_begin;
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namelen = ident.name_end - ident.name_begin;
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if (map_user(mailmap, &mail, &maillen, &name, &namelen)) {
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struct strbuf namemail = STRBUF_INIT;
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size_t newlen;
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strbuf_addf(&namemail, "%.*s <%.*s>",
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(int)namelen, name, (int)maillen, mail);
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strbuf_splice(buf, ident.name_begin - buf->buf,
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ident.mail_end - ident.name_begin + 1,
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namemail.buf, namemail.len);
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newlen = namemail.len;
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strbuf_release(&namemail);
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return newlen - (ident.mail_end - ident.name_begin);
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}
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return 0;
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}
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void apply_mailmap_to_header(struct strbuf *buf, const char **header,
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struct string_list *mailmap)
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{
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size_t buf_offset = 0;
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if (!mailmap)
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return;
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for (;;) {
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const char *person, *line;
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size_t i;
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int found_header = 0;
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line = buf->buf + buf_offset;
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if (!*line || *line == '\n')
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return; /* End of headers */
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for (i = 0; header[i]; i++)
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if (skip_prefix(line, header[i], &person)) {
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const char *endp = strchrnul(person, '\n');
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found_header = 1;
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buf_offset += endp - line;
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buf_offset += rewrite_ident_line(person, endp - person, buf, mailmap);
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break;
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}
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if (!found_header) {
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buf_offset = strchrnul(line, '\n') - buf->buf;
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if (buf->buf[buf_offset] == '\n')
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buf_offset++;
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}
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}
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}
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static void ident_env_hint(enum want_ident whose_ident)
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{
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switch (whose_ident) {
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case WANT_AUTHOR_IDENT:
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fputs(_("Author identity unknown\n"), stderr);
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break;
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case WANT_COMMITTER_IDENT:
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fputs(_("Committer identity unknown\n"), stderr);
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break;
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default:
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break;
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}
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fputs(_("\n"
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"*** Please tell me who you are.\n"
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"\n"
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"Run\n"
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"\n"
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" git config --global user.email \"you@example.com\"\n"
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" git config --global user.name \"Your Name\"\n"
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"\n"
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"to set your account\'s default identity.\n"
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"Omit --global to set the identity only in this repository.\n"
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"\n"), stderr);
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}
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const char *fmt_ident(const char *name, const char *email,
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enum want_ident whose_ident, const char *date_str, int flag)
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{
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static int index;
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static struct strbuf ident_pool[2] = { STRBUF_INIT, STRBUF_INIT };
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int strict = (flag & IDENT_STRICT);
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int want_date = !(flag & IDENT_NO_DATE);
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int want_name = !(flag & IDENT_NO_NAME);
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struct strbuf *ident = &ident_pool[index];
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index = (index + 1) % ARRAY_SIZE(ident_pool);
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if (!email) {
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if (whose_ident == WANT_AUTHOR_IDENT && git_author_email.len)
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email = git_author_email.buf;
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else if (whose_ident == WANT_COMMITTER_IDENT && git_committer_email.len)
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email = git_committer_email.buf;
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}
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if (!email) {
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if (strict && ident_use_config_only
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&& !(ident_config_given & IDENT_MAIL_GIVEN)) {
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ident_env_hint(whose_ident);
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die(_("no email was given and auto-detection is disabled"));
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}
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email = ident_default_email();
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if (strict && default_email_is_bogus) {
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ident_env_hint(whose_ident);
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die(_("unable to auto-detect email address (got '%s')"), email);
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}
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}
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if (want_name) {
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int using_default = 0;
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if (!name) {
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if (whose_ident == WANT_AUTHOR_IDENT && git_author_name.len)
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name = git_author_name.buf;
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else if (whose_ident == WANT_COMMITTER_IDENT &&
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git_committer_name.len)
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name = git_committer_name.buf;
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}
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if (!name) {
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if (strict && ident_use_config_only
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&& !(ident_config_given & IDENT_NAME_GIVEN)) {
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ident_env_hint(whose_ident);
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die(_("no name was given and auto-detection is disabled"));
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}
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name = ident_default_name();
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using_default = 1;
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if (strict && default_name_is_bogus) {
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ident_env_hint(whose_ident);
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die(_("unable to auto-detect name (got '%s')"), name);
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}
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}
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if (!*name) {
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struct passwd *pw;
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if (strict) {
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if (using_default)
|
|
ident_env_hint(whose_ident);
|
|
die(_("empty ident name (for <%s>) not allowed"), email);
|
|
}
|
|
pw = xgetpwuid_self(NULL);
|
|
name = pw->pw_name;
|
|
}
|
|
if (strict && !has_non_crud(name))
|
|
die(_("name consists only of disallowed characters: %s"), name);
|
|
}
|
|
|
|
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(enum want_ident whose_ident)
|
|
{
|
|
char *name = NULL;
|
|
char *email = NULL;
|
|
|
|
switch (whose_ident) {
|
|
case WANT_BLANK_IDENT:
|
|
break;
|
|
case WANT_AUTHOR_IDENT:
|
|
name = getenv("GIT_AUTHOR_NAME");
|
|
email = getenv("GIT_AUTHOR_EMAIL");
|
|
break;
|
|
case WANT_COMMITTER_IDENT:
|
|
name = getenv("GIT_COMMITTER_NAME");
|
|
email = getenv("GIT_COMMITTER_EMAIL");
|
|
break;
|
|
}
|
|
return fmt_ident(name, email, whose_ident, 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"),
|
|
WANT_AUTHOR_IDENT,
|
|
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"),
|
|
WANT_COMMITTER_IDENT,
|
|
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);
|
|
}
|
|
|
|
static int set_ident(const char *var, const char *value)
|
|
{
|
|
if (!strcmp(var, "author.name")) {
|
|
if (!value)
|
|
return config_error_nonbool(var);
|
|
strbuf_reset(&git_author_name);
|
|
strbuf_addstr(&git_author_name, value);
|
|
author_ident_explicitly_given |= IDENT_NAME_GIVEN;
|
|
ident_config_given |= IDENT_NAME_GIVEN;
|
|
return 0;
|
|
}
|
|
|
|
if (!strcmp(var, "author.email")) {
|
|
if (!value)
|
|
return config_error_nonbool(var);
|
|
strbuf_reset(&git_author_email);
|
|
strbuf_addstr(&git_author_email, value);
|
|
author_ident_explicitly_given |= IDENT_MAIL_GIVEN;
|
|
ident_config_given |= IDENT_MAIL_GIVEN;
|
|
return 0;
|
|
}
|
|
|
|
if (!strcmp(var, "committer.name")) {
|
|
if (!value)
|
|
return config_error_nonbool(var);
|
|
strbuf_reset(&git_committer_name);
|
|
strbuf_addstr(&git_committer_name, value);
|
|
committer_ident_explicitly_given |= IDENT_NAME_GIVEN;
|
|
ident_config_given |= IDENT_NAME_GIVEN;
|
|
return 0;
|
|
}
|
|
|
|
if (!strcmp(var, "committer.email")) {
|
|
if (!value)
|
|
return config_error_nonbool(var);
|
|
strbuf_reset(&git_committer_email);
|
|
strbuf_addstr(&git_committer_email, value);
|
|
committer_ident_explicitly_given |= IDENT_MAIL_GIVEN;
|
|
ident_config_given |= IDENT_MAIL_GIVEN;
|
|
return 0;
|
|
}
|
|
|
|
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;
|
|
ident_config_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;
|
|
ident_config_given |= IDENT_MAIL_GIVEN;
|
|
return 0;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int git_ident_config(const char *var, const char *value, void *data UNUSED)
|
|
{
|
|
if (!strcmp(var, "user.useconfigonly")) {
|
|
ident_use_config_only = git_config_bool(var, value);
|
|
return 0;
|
|
}
|
|
|
|
return set_ident(var, value);
|
|
}
|
|
|
|
static void set_env_if(const char *key, const char *value, int *given, int bit)
|
|
{
|
|
if ((*given & bit) || getenv(key))
|
|
return; /* nothing to do */
|
|
setenv(key, value, 0);
|
|
*given |= bit;
|
|
}
|
|
|
|
void prepare_fallback_ident(const char *name, const char *email)
|
|
{
|
|
set_env_if("GIT_AUTHOR_NAME", name,
|
|
&author_ident_explicitly_given, IDENT_NAME_GIVEN);
|
|
set_env_if("GIT_AUTHOR_EMAIL", email,
|
|
&author_ident_explicitly_given, IDENT_MAIL_GIVEN);
|
|
set_env_if("GIT_COMMITTER_NAME", name,
|
|
&committer_ident_explicitly_given, IDENT_NAME_GIVEN);
|
|
set_env_if("GIT_COMMITTER_EMAIL", email,
|
|
&committer_ident_explicitly_given, IDENT_MAIL_GIVEN);
|
|
}
|
|
|
|
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);
|
|
}
|