git-rm: honor -n flag.
[git.git] / config.c
index 5d237c8..2ae6153 100644 (file)
--- a/config.c
+++ b/config.c
@@ -11,6 +11,7 @@
 #define MAXNAME (256)
 
 static FILE *config_file;
+static const char *config_file_name;
 static int config_linenr;
 static int get_next_char(void)
 {
@@ -59,6 +60,12 @@ static char *parse_value(void)
                        space = 1;
                        continue;
                }
+               if (!quote) {
+                       if (c == ';' || c == '#') {
+                               comment = 1;
+                               continue;
+                       }
+               }
                if (space) {
                        if (len)
                                value[len++] = ' ';
@@ -92,12 +99,6 @@ static char *parse_value(void)
                        quote = 1-quote;
                        continue;
                }
-               if (!quote) {
-                       if (c == ';' || c == '#') {
-                               comment = 1;
-                               continue;
-                       }
-               }
                value[len++] = c;
        }
 }
@@ -133,6 +134,41 @@ static int get_value(config_fn_t fn, char *name, unsigned int len)
        return fn(name, value);
 }
 
+static int get_extended_base_var(char *name, int baselen, int c)
+{
+       do {
+               if (c == '\n')
+                       return -1;
+               c = get_next_char();
+       } while (isspace(c));
+
+       /* We require the format to be '[base "extension"]' */
+       if (c != '"')
+               return -1;
+       name[baselen++] = '.';
+
+       for (;;) {
+               int c = get_next_char();
+               if (c == '\n')
+                       return -1;
+               if (c == '"')
+                       break;
+               if (c == '\\') {
+                       c = get_next_char();
+                       if (c == '\n')
+                               return -1;
+               }
+               name[baselen++] = c;
+               if (baselen > MAXNAME / 2)
+                       return -1;
+       }
+
+       /* Final ']' */
+       if (get_next_char() != ']')
+               return -1;
+       return baselen;
+}
+
 static int get_base_var(char *name)
 {
        int baselen = 0;
@@ -143,7 +179,9 @@ static int get_base_var(char *name)
                        return -1;
                if (c == ']')
                        return baselen;
-               if (!isalnum(c))
+               if (isspace(c))
+                       return get_extended_base_var(name, baselen, c);
+               if (!isalnum(c) && c != '.')
                        return -1;
                if (baselen > MAXNAME / 2)
                        return -1;
@@ -186,7 +224,7 @@ static int git_parse_file(config_fn_t fn)
                if (get_value(fn, var, baselen+1) < 0)
                        break;
        }
-       die("bad config file line %d", config_linenr);
+       die("bad config file line %d in %s", config_linenr, config_file_name);
 }
 
 int git_config_int(const char *name, const char *value)
@@ -197,7 +235,7 @@ int git_config_int(const char *name, const char *value)
                if (!*end)
                        return val;
        }
-       die("bad config value for '%s'", name);
+       die("bad config value for '%s' in %s", name, config_file_name);
 }
 
 int git_config_bool(const char *name, const char *value)
@@ -221,8 +259,23 @@ int git_default_config(const char *var, const char *value)
                return 0;
        }
 
-       if (!strcmp(var, "core.symrefsonly")) {
-               only_use_symrefs = git_config_bool(var, value);
+       if (!strcmp(var, "core.ignorestat")) {
+               assume_unchanged = git_config_bool(var, value);
+               return 0;
+       }
+
+       if (!strcmp(var, "core.prefersymlinkrefs")) {
+               prefer_symlink_refs = git_config_bool(var, value);
+               return 0;
+       }
+
+       if (!strcmp(var, "core.logallrefupdates")) {
+               log_all_ref_updates = git_config_bool(var, value);
+               return 0;
+       }
+
+       if (!strcmp(var, "core.warnambiguousrefs")) {
+               warn_ambiguous_refs = git_config_bool(var, value);
                return 0;
        }
 
@@ -236,30 +289,37 @@ int git_default_config(const char *var, const char *value)
                return 0;
        }
 
-       if (!strcmp(var, "diff.renamelimit")) {
-               diff_rename_limit_default = git_config_int(var, value);
+       if (!strcmp(var, "i18n.commitencoding")) {
+               strncpy(git_commit_encoding, value, sizeof(git_commit_encoding));
                return 0;
        }
 
-       /* Add other config variables here.. */
+       /* Add other config variables here and to Documentation/config.txt. */
        return 0;
 }
 
-int git_config(config_fn_t fn)
+int git_config_from_file(config_fn_t fn, const char *filename)
 {
        int ret;
-       FILE *f = fopen(git_path("config"), "r");
+       FILE *f = fopen(filename, "r");
 
        ret = -1;
        if (f) {
                config_file = f;
+               config_file_name = filename;
                config_linenr = 1;
                ret = git_parse_file(fn);
                fclose(f);
+               config_file_name = NULL;
        }
        return ret;
 }
 
+int git_config(config_fn_t fn)
+{
+       return git_config_from_file(fn, git_path("config"));
+}
+
 /*
  * Find all the stuff for git_config_set() below.
  */
@@ -317,16 +377,43 @@ static int store_aux(const char* key, const char* value)
                        store.offset[store.seen] = ftell(config_file);
                        store.state = KEY_SEEN;
                        store.seen++;
-               } else if(!strncmp(key, store.key, store.baselen))
-                       store.state = SECTION_SEEN;
+               } else {
+                       if (strrchr(key, '.') - key == store.baselen &&
+                             !strncmp(key, store.key, store.baselen)) {
+                                       store.state = SECTION_SEEN;
+                                       store.offset[store.seen] = ftell(config_file);
+                       }
+               }
        }
        return 0;
 }
 
 static void store_write_section(int fd, const char* key)
 {
+       const char *dot = strchr(key, '.');
+       int len1 = store.baselen, len2 = -1;
+
+       dot = strchr(key, '.');
+       if (dot) {
+               int dotlen = dot - key;
+               if (dotlen < len1) {
+                       len2 = len1 - dotlen - 1;
+                       len1 = dotlen;
+               }
+       }
+
        write(fd, "[", 1);
-       write(fd, key, store.baselen);
+       write(fd, key, len1);
+       if (len2 >= 0) {
+               write(fd, " \"", 2);
+               while (--len2 >= 0) {
+                       unsigned char c = *++dot;
+                       if (c == '"')
+                               write(fd, "\\", 1);
+                       write(fd, &c, 1);
+               }
+               write(fd, "\"", 1);
+       }
        write(fd, "]\n", 2);
 }
 
@@ -400,38 +487,49 @@ int git_config_set(const char* key, const char* value)
 int git_config_set_multivar(const char* key, const char* value,
        const char* value_regex, int multi_replace)
 {
-       int i;
-       struct stat st;
-       int fd;
-       char* config_file = strdup(git_path("config"));
+       int i, dot;
+       int fd = -1, in_fd;
+       int ret;
+       char* config_filename = strdup(git_path("config"));
        char* lock_file = strdup(git_path("config.lock"));
-
-       store.multi_replace = multi_replace;
+       const char* last_dot = strrchr(key, '.');
 
        /*
         * Since "key" actually contains the section name and the real
         * key name separated by a dot, we have to know where the dot is.
         */
-       for (store.baselen = 0;
-                       key[store.baselen] != '.' && key[store.baselen];
-                       store.baselen++);
-       if (!key[store.baselen] || !key[store.baselen+1]) {
+
+       if (last_dot == NULL) {
                fprintf(stderr, "key does not contain a section: %s\n", key);
-               return 2;
+               ret = 2;
+               goto out_free;
        }
+       store.baselen = last_dot - key;
+
+       store.multi_replace = multi_replace;
 
        /*
         * Validate the key and while at it, lower case it for matching.
         */
        store.key = (char*)malloc(strlen(key)+1);
-       for (i = 0; key[i]; i++)
-               if (i != store.baselen && (!isalnum(key[i]) ||
-                               (i == store.baselen+1 && !isalpha(key[i])))) {
-                       fprintf(stderr, "invalid key: %s\n", key);
-                       free(store.key);
-                       return 1;
-               } else
-                       store.key[i] = tolower(key[i]);
+       dot = 0;
+       for (i = 0; key[i]; i++) {
+               unsigned char c = key[i];
+               if (c == '.')
+                       dot = 1;
+               /* Leave the extended basename untouched.. */
+               if (!dot || i > store.baselen) {
+                       if (!isalnum(c) || (i == store.baselen+1 && !isalpha(c))) {
+                               fprintf(stderr, "invalid key: %s\n", key);
+                               free(store.key);
+                               ret = 1;
+                               goto out_free;
+                       }
+                       c = tolower(c);
+               }
+               store.key[i] = c;
+       }
+       store.key[i] = 0;
 
        /*
         * The lock_file serves a purpose in addition to locking: the new
@@ -441,35 +539,34 @@ int git_config_set_multivar(const char* key, const char* value,
        if (fd < 0) {
                fprintf(stderr, "could not lock config file\n");
                free(store.key);
-               return -1;
+               ret = -1;
+               goto out_free;
        }
 
        /*
         * If .git/config does not exist yet, write a minimal version.
         */
-       if (stat(config_file, &st)) {
-               static const char contents[] =
-                       "#\n"
-                       "# This is the config file\n"
-                       "#\n"
-                       "\n";
-
+       in_fd = open(config_filename, O_RDONLY);
+       if ( in_fd < 0 ) {
                free(store.key);
 
+               if ( ENOENT != errno ) {
+                       error("opening %s: %s", config_filename,
+                             strerror(errno));
+                       ret = 3; /* same as "invalid config file" */
+                       goto out_free;
+               }
                /* if nothing to unset, error out */
                if (value == NULL) {
-                       close(fd);
-                       unlink(lock_file);
-                       return 5;
+                       ret = 5;
+                       goto out_free;
                }
 
                store.key = (char*)key;
-
-               write(fd, contents, sizeof(contents)-1);
                store_write_section(fd, key);
                store_write_pair(fd, key, value);
        } else{
-               int in_fd;
+               struct stat st;
                char* contents;
                int i, copy_begin, copy_end, new_line = 0;
 
@@ -485,10 +582,11 @@ int git_config_set_multivar(const char* key, const char* value,
                        store.value_regex = (regex_t*)malloc(sizeof(regex_t));
                        if (regcomp(store.value_regex, value_regex,
                                        REG_EXTENDED)) {
-                               fprintf(stderr, "Invalid pattern: %s",
+                               fprintf(stderr, "Invalid pattern: %s\n",
                                        value_regex);
                                free(store.value_regex);
-                               return 6;
+                               ret = 6;
+                               goto out_free;
                        }
                }
 
@@ -509,7 +607,8 @@ int git_config_set_multivar(const char* key, const char* value,
                                regfree(store.value_regex);
                                free(store.value_regex);
                        }
-                       return 3;
+                       ret = 3;
+                       goto out_free;
                }
 
                free(store.key);
@@ -521,12 +620,11 @@ int git_config_set_multivar(const char* key, const char* value,
                /* if nothing to unset, or too many matches, error out */
                if ((store.seen == 0 && value == NULL) ||
                                (store.seen > 1 && multi_replace == 0)) {
-                       close(fd);
-                       unlink(lock_file);
-                       return 5;
+                       ret = 5;
+                       goto out_free;
                }
 
-               in_fd = open(config_file, O_RDONLY, 0666);
+               fstat(in_fd, &st);
                contents = mmap(NULL, st.st_size, PROT_READ,
                        MAP_PRIVATE, in_fd, 0);
                close(in_fd);
@@ -567,17 +665,27 @@ int git_config_set_multivar(const char* key, const char* value,
                                st.st_size - copy_begin);
 
                munmap(contents, st.st_size);
-               unlink(config_file);
+               unlink(config_filename);
        }
 
-       close(fd);
-
-       if (rename(lock_file, config_file) < 0) {
+       if (rename(lock_file, config_filename) < 0) {
                fprintf(stderr, "Could not rename the lock file?\n");
-               return 4;
+               ret = 4;
+               goto out_free;
        }
 
-       return 0;
+       ret = 0;
+
+out_free:
+       if (0 <= fd)
+               close(fd);
+       if (config_filename)
+               free(config_filename);
+       if (lock_file) {
+               unlink(lock_file);
+               free(lock_file);
+       }
+       return ret;
 }