diff options
Diffstat (limited to 'ident.c')
| -rw-r--r-- | ident.c | 257 |
1 files changed, 257 insertions, 0 deletions
@@ -0,0 +1,257 @@ +/* + * ident.c + * + * create git identifier lines of the form "name <email> date" + * + * Copyright (C) 2005 Linus Torvalds + */ +#include "cache.h" + +static char git_default_date[50]; + +static void copy_gecos(const struct passwd *w, char *name, size_t sz) +{ + char *src, *dst; + size_t len, nlen; + + nlen = strlen(w->pw_name); + + /* Traditionally GECOS field had office phone numbers etc, separated + * with commas. Also & stands for capitalized form of the login name. + */ + + for (len = 0, dst = name, src = w->pw_gecos; len < sz; src++) { + int ch = *src; + if (ch != '&') { + *dst++ = ch; + if (ch == 0 || ch == ',') + break; + len++; + continue; + } + if (len + nlen < sz) { + /* Sorry, Mr. McDonald... */ + *dst++ = toupper(*w->pw_name); + memcpy(dst, w->pw_name + 1, nlen - 1); + dst += nlen - 1; + } + } + if (len < sz) + name[len] = 0; + else + die("Your parents must have hated you!"); + +} + +static void copy_email(const struct passwd *pw) +{ + /* + * Make up a fake email address + * (name + '@' + hostname [+ '.' + domainname]) + */ + size_t len = strlen(pw->pw_name); + if (len > sizeof(git_default_email)/2) + die("Your sysadmin must hate you!"); + memcpy(git_default_email, pw->pw_name, len); + git_default_email[len++] = '@'; + gethostname(git_default_email + len, sizeof(git_default_email) - len); + if (!strchr(git_default_email+len, '.')) { + struct hostent *he = gethostbyname(git_default_email + len); + char *domainname; + + len = strlen(git_default_email); + git_default_email[len++] = '.'; + if (he && (domainname = strchr(he->h_name, '.'))) + strlcpy(git_default_email + len, domainname + 1, + sizeof(git_default_email) - len); + else + strlcpy(git_default_email + len, "(none)", + sizeof(git_default_email) - len); + } +} + +static void setup_ident(void) +{ + struct passwd *pw = NULL; + + /* Get the name ("gecos") */ + if (!git_default_name[0]) { + pw = getpwuid(getuid()); + if (!pw) + die("You don't exist. Go away!"); + copy_gecos(pw, git_default_name, sizeof(git_default_name)); + } + + if (!git_default_email[0]) { + const char *email = getenv("EMAIL"); + + if (email && email[0]) + strlcpy(git_default_email, email, + sizeof(git_default_email)); + else { + if (!pw) + pw = getpwuid(getuid()); + if (!pw) + die("You don't exist. Go away!"); + copy_email(pw); + } + } + + /* And set the default date */ + if (!git_default_date[0]) + datestamp(git_default_date, sizeof(git_default_date)); +} + +static int add_raw(char *buf, size_t size, int offset, const char *str) +{ + size_t len = strlen(str); + if (offset + len > size) + return size; + memcpy(buf + offset, str, len); + return offset + len; +} + +static int crud(unsigned char c) +{ + return c <= 32 || + 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 int copy(char *buf, size_t size, int offset, 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 + */ + for (i = 0; i < len; i++) { + c = *src++; + switch (c) { + case '\n': case '<': case '>': + continue; + } + if (offset >= size) + return size; + buf[offset++] = c; + } + return offset; +} + +static const char au_env[] = "GIT_AUTHOR_NAME"; +static const char co_env[] = "GIT_COMMITTER_NAME"; +static const char *env_hint = +"\n" +"*** Your name cannot be determined from your system services (gecos).\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 char buffer[1000]; + char date[50]; + int i; + int error_on_no_name = (flag & IDENT_ERROR_ON_NO_NAME); + int warn_on_no_name = (flag & IDENT_WARN_ON_NO_NAME); + int name_addr_only = (flag & IDENT_NO_DATE); + + setup_ident(); + if (!name) + name = git_default_name; + if (!email) + email = git_default_email; + + if (!*name) { + struct passwd *pw; + + if ((warn_on_no_name || error_on_no_name) && + name == git_default_name && env_hint) { + fprintf(stderr, env_hint, au_env, co_env); + env_hint = NULL; /* warn only once, for "git-var -l" */ + } + if (error_on_no_name) + die("empty ident %s <%s> not allowed", name, email); + pw = getpwuid(getuid()); + if (!pw) + die("You don't exist. Go away!"); + strlcpy(git_default_name, pw->pw_name, + sizeof(git_default_name)); + name = git_default_name; + } + + strcpy(date, git_default_date); + if (!name_addr_only && date_str) + parse_date(date_str, date, sizeof(date)); + + i = copy(buffer, sizeof(buffer), 0, name); + i = add_raw(buffer, sizeof(buffer), i, " <"); + i = copy(buffer, sizeof(buffer), i, email); + if (!name_addr_only) { + i = add_raw(buffer, sizeof(buffer), i, "> "); + i = copy(buffer, sizeof(buffer), i, date); + } else { + i = add_raw(buffer, sizeof(buffer), i, ">"); + } + if (i >= sizeof(buffer)) + die("Impossibly long personal identifier"); + buffer[i] = 0; + return buffer; +} + +const char *fmt_name(const char *name, const char *email) +{ + return fmt_ident(name, email, NULL, IDENT_ERROR_ON_NO_NAME | IDENT_NO_DATE); +} + +const char *git_author_info(int flag) +{ + return fmt_ident(getenv("GIT_AUTHOR_NAME"), + getenv("GIT_AUTHOR_EMAIL"), + getenv("GIT_AUTHOR_DATE"), + flag); +} + +const char *git_committer_info(int flag) +{ + return fmt_ident(getenv("GIT_COMMITTER_NAME"), + getenv("GIT_COMMITTER_EMAIL"), + getenv("GIT_COMMITTER_DATE"), + flag); +} |