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![Junio C Hamano](/assets/img/avatar_default.png)
It appears that some people who did not care about having bogus names in their own commit messages are bitten by the recent change to require a sane environment [*1*]. While it was a good idea to prevent people from using bogus names to create commits and doing sign-offs, the error message is not very informative. This patch attempts to warn things upfront and hint people how to fix their environments. [Footnote] *1* The thread is this one. http://marc.theaimsgroup.com/?t=113868084800004 Especially this message. http://marc.theaimsgroup.com/?m=113932830015032 Signed-off-by: Junio C Hamano <junkio@cox.net>
217 lines
5 KiB
C
217 lines
5 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 <pwd.h>
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#include <netdb.h>
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static char git_default_date[50];
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static void copy_gecos(struct passwd *w, char *name, int sz)
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{
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char *src, *dst;
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int len, nlen;
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nlen = strlen(w->pw_name);
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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 (len = 0, dst = name, src = w->pw_gecos; len < sz; src++) {
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int ch = *src;
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if (ch != '&') {
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*dst++ = ch;
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if (ch == 0 || ch == ',')
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break;
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len++;
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continue;
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}
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if (len + nlen < sz) {
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/* Sorry, Mr. McDonald... */
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*dst++ = toupper(*w->pw_name);
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memcpy(dst, w->pw_name + 1, nlen - 1);
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dst += nlen - 1;
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}
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}
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if (len < sz)
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name[len] = 0;
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else
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die("Your parents must have hated you!");
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}
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static const char au_env[] = "GIT_AUTHOR_NAME";
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static const char co_env[] = "GIT_COMMITTER_NAME";
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static const char env_hint[] =
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"\n*** Environment problem:\n"
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"*** Your name cannot be determined from your system services (gecos).\n"
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"*** You would need to set %s and %s\n"
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"*** environment variables; otherwise you won't be able to perform\n"
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"*** certain operations because of \"empty ident\" errors.\n\n";
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int setup_ident(void)
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{
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int len;
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struct passwd *pw = getpwuid(getuid());
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if (!pw)
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die("You don't exist. Go away!");
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/* Get the name ("gecos") */
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copy_gecos(pw, git_default_name, sizeof(git_default_name));
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if (!*git_default_name) {
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if (!getenv(au_env) || !getenv(co_env))
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fprintf(stderr, env_hint, au_env, co_env);
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}
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/* Make up a fake email address (name + '@' + hostname [+ '.' + domainname]) */
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len = strlen(pw->pw_name);
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if (len > sizeof(git_default_email)/2)
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die("Your sysadmin must hate you!");
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memcpy(git_default_email, pw->pw_name, len);
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git_default_email[len++] = '@';
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gethostname(git_default_email + len, sizeof(git_default_email) - len);
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if (!strchr(git_default_email+len, '.')) {
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struct hostent *he = gethostbyname(git_default_email + len);
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char *domainname;
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len = strlen(git_default_email);
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git_default_email[len++] = '.';
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if (he && (domainname = strchr(he->h_name, '.')))
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strncpy(git_default_email + len, domainname + 1, sizeof(git_default_email) - len);
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else
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strncpy(git_default_email + len, "(none)", sizeof(git_default_email) - len);
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git_default_email[sizeof(git_default_email) - 1] = 0;
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}
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/* And set the default date */
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datestamp(git_default_date, sizeof(git_default_date));
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return 0;
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}
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static int add_raw(char *buf, int size, int offset, const char *str)
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{
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int len = strlen(str);
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if (offset + len > size)
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return size;
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memcpy(buf + offset, str, len);
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return offset + len;
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}
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static int crud(unsigned char c)
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{
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static char crud_array[256];
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static int crud_array_initialized = 0;
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if (!crud_array_initialized) {
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int k;
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for (k = 0; k <= 31; ++k) crud_array[k] = 1;
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crud_array[' '] = 1;
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crud_array['.'] = 1;
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crud_array[','] = 1;
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crud_array[':'] = 1;
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crud_array[';'] = 1;
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crud_array['<'] = 1;
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crud_array['>'] = 1;
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crud_array['"'] = 1;
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crud_array['\''] = 1;
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crud_array_initialized = 1;
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}
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return crud_array[c];
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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 int copy(char *buf, int size, int offset, const char *src)
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{
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int 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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* a identification line
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*/
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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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if (offset >= size)
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return size;
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buf[offset++] = c;
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}
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return offset;
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}
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static const char *get_ident(const char *name, const char *email,
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const char *date_str)
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{
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static char buffer[1000];
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char date[50];
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int i;
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if (!name)
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name = git_default_name;
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if (!email)
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email = git_default_email;
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if (!*name || !*email)
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die("empty ident %s <%s> not allowed",
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name, email);
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strcpy(date, git_default_date);
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if (date_str)
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parse_date(date_str, date, sizeof(date));
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i = copy(buffer, sizeof(buffer), 0, name);
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i = add_raw(buffer, sizeof(buffer), i, " <");
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i = copy(buffer, sizeof(buffer), i, email);
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i = add_raw(buffer, sizeof(buffer), i, "> ");
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i = copy(buffer, sizeof(buffer), i, date);
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if (i >= sizeof(buffer))
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die("Impossibly long personal identifier");
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buffer[i] = 0;
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return buffer;
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}
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const char *git_author_info(void)
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{
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return get_ident(getenv("GIT_AUTHOR_NAME"),
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getenv("GIT_AUTHOR_EMAIL"),
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getenv("GIT_AUTHOR_DATE"));
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}
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const char *git_committer_info(void)
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{
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return get_ident(getenv("GIT_COMMITTER_NAME"),
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getenv("GIT_COMMITTER_EMAIL"),
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getenv("GIT_COMMITTER_DATE"));
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}
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