update-index: do not die too early in a read-only repository.
[gitweb.git] / config.c
index d064f429cb4369ac08f7ad267b0b182112462b16..d82107124a53bca99ee65ea31dceb3871bf6796f 100644 (file)
--- a/config.c
+++ b/config.c
@@ -6,7 +6,6 @@
  *
  */
 #include "cache.h"
-#include <regex.h>
 
 #define MAXNAME (256)
 
@@ -103,6 +102,11 @@ static char *parse_value(void)
        }
 }
 
+static inline int iskeychar(int c)
+{
+       return isalnum(c) || c == '-';
+}
+
 static int get_value(config_fn_t fn, char *name, unsigned int len)
 {
        int c;
@@ -113,7 +117,7 @@ static int get_value(config_fn_t fn, char *name, unsigned int len)
                c = get_next_char();
                if (c == EOF)
                        break;
-               if (!isalnum(c))
+               if (!iskeychar(c))
                        break;
                name[len++] = tolower(c);
                if (len >= MAXNAME)
@@ -181,7 +185,7 @@ static int get_base_var(char *name)
                        return baselen;
                if (isspace(c))
                        return get_extended_base_var(name, baselen, c);
-               if (!isalnum(c) && c != '.')
+               if (!iskeychar(c) && c != '.')
                        return -1;
                if (baselen > MAXNAME / 2)
                        return -1;
@@ -234,6 +238,12 @@ int git_config_int(const char *name, const char *value)
                int val = strtol(value, &end, 0);
                if (!*end)
                        return val;
+               if (!strcasecmp(end, "k"))
+                       return val * 1024;
+               if (!strcasecmp(end, "m"))
+                       return val * 1024 * 1024;
+               if (!strcasecmp(end, "g"))
+                       return val * 1024 * 1024 * 1024;
        }
        die("bad config value for '%s' in %s", name, config_file_name);
 }
@@ -244,9 +254,9 @@ int git_config_bool(const char *name, const char *value)
                return 1;
        if (!*value)
                return 0;
-       if (!strcasecmp(value, "true"))
+       if (!strcasecmp(value, "true") || !strcasecmp(value, "yes"))
                return 1;
-       if (!strcasecmp(value, "false"))
+       if (!strcasecmp(value, "false") || !strcasecmp(value, "no"))
                return 0;
        return git_config_int(name, value) != 0;
 }
@@ -259,6 +269,11 @@ int git_default_config(const char *var, const char *value)
                return 0;
        }
 
+       if (!strcmp(var, "core.bare")) {
+               is_bare_repository_cfg = git_config_bool(var, value);
+               return 0;
+       }
+
        if (!strcmp(var, "core.ignorestat")) {
                assume_unchanged = git_config_bool(var, value);
                return 0;
@@ -279,18 +294,59 @@ int git_default_config(const char *var, const char *value)
                return 0;
        }
 
+       if (!strcmp(var, "core.legacyheaders")) {
+               use_legacy_headers = git_config_bool(var, value);
+               return 0;
+       }
+
+       if (!strcmp(var, "core.compression")) {
+               int level = git_config_int(var, value);
+               if (level == -1)
+                       level = Z_DEFAULT_COMPRESSION;
+               else if (level < 0 || level > Z_BEST_COMPRESSION)
+                       die("bad zlib compression level %d", level);
+               zlib_compression_level = level;
+               return 0;
+       }
+
+       if (!strcmp(var, "core.packedgitwindowsize")) {
+               int pgsz = getpagesize();
+               packed_git_window_size = git_config_int(var, value);
+               packed_git_window_size /= pgsz;
+               if (packed_git_window_size < 2)
+                       packed_git_window_size = 2;
+               packed_git_window_size *= pgsz;
+               return 0;
+       }
+
+       if (!strcmp(var, "core.packedgitlimit")) {
+               packed_git_limit = git_config_int(var, value);
+               return 0;
+       }
+
        if (!strcmp(var, "user.name")) {
-               safe_strncpy(git_default_name, value, sizeof(git_default_name));
+               strlcpy(git_default_name, value, sizeof(git_default_name));
                return 0;
        }
 
        if (!strcmp(var, "user.email")) {
-               safe_strncpy(git_default_email, value, sizeof(git_default_email));
+               strlcpy(git_default_email, value, sizeof(git_default_email));
                return 0;
        }
 
        if (!strcmp(var, "i18n.commitencoding")) {
-               safe_strncpy(git_commit_encoding, value, sizeof(git_commit_encoding));
+               git_commit_encoding = strdup(value);
+               return 0;
+       }
+
+       if (!strcmp(var, "i18n.logoutputencoding")) {
+               git_log_output_encoding = strdup(value);
+               return 0;
+       }
+
+
+       if (!strcmp(var, "pager.color") || !strcmp(var, "color.pager")) {
+               pager_use_color = git_config_bool(var,value);
                return 0;
        }
 
@@ -325,24 +381,23 @@ int git_config(config_fn_t fn)
         * $GIT_CONFIG_LOCAL will make it process it in addition to the
         * global config file, the same way it would the per-repository
         * config file otherwise. */
-       filename = getenv("GIT_CONFIG");
+       filename = getenv(CONFIG_ENVIRONMENT);
        if (!filename) {
                home = getenv("HOME");
-               filename = getenv("GIT_CONFIG_LOCAL");
+               filename = getenv(CONFIG_LOCAL_ENVIRONMENT);
                if (!filename)
-                       filename = repo_config = strdup(git_path("config"));
+                       filename = repo_config = xstrdup(git_path("config"));
        }
 
        if (home) {
-               char *user_config = strdup(mkpath("%s/.gitconfig", home));
-               if (access(user_config, R_OK) > 0)
+               char *user_config = xstrdup(mkpath("%s/.gitconfig", home));
+               if (!access(user_config, R_OK))
                        ret = git_config_from_file(fn, user_config);
                free(user_config);
        }
 
        ret += git_config_from_file(fn, filename);
-       if (repo_config)
-               free(repo_config);
+       free(repo_config);
        return ret;
 }
 
@@ -414,7 +469,15 @@ static int store_aux(const char* key, const char* value)
        return 0;
 }
 
-static void store_write_section(int fd, const char* key)
+static int write_error()
+{
+       fprintf(stderr, "Failed to write new configuration file\n");
+
+       /* Same error code as "failed to rename". */
+       return 4;
+}
+
+static int store_write_section(int fd, const char* key)
 {
        const char *dot = strchr(key, '.');
        int len1 = store.baselen, len2 = -1;
@@ -428,37 +491,74 @@ static void store_write_section(int fd, const char* key)
                }
        }
 
-       write(fd, "[", 1);
-       write(fd, key, len1);
+       if (write_in_full(fd, "[", 1) != 1 ||
+           write_in_full(fd, key, len1) != len1)
+               return 0;
        if (len2 >= 0) {
-               write(fd, " \"", 2);
+               if (write_in_full(fd, " \"", 2) != 2)
+                       return 0;
                while (--len2 >= 0) {
                        unsigned char c = *++dot;
                        if (c == '"')
-                               write(fd, "\\", 1);
-                       write(fd, &c, 1);
+                               if (write_in_full(fd, "\\", 1) != 1)
+                                       return 0;
+                       if (write_in_full(fd, &c, 1) != 1)
+                               return 0;
                }
-               write(fd, "\"", 1);
+               if (write_in_full(fd, "\"", 1) != 1)
+                       return 0;
        }
-       write(fd, "]\n", 2);
+       if (write_in_full(fd, "]\n", 2) != 2)
+               return 0;
+
+       return 1;
 }
 
-static void store_write_pair(int fd, const char* key, const char* value)
+static int store_write_pair(int fd, const char* key, const char* value)
 {
        int i;
+       int length = strlen(key+store.baselen+1);
+       int quote = 0;
 
-       write(fd, "\t", 1);
-       write(fd, key+store.baselen+1,
-               strlen(key+store.baselen+1));
-       write(fd, " = ", 3);
+       /* Check to see if the value needs to be quoted. */
+       if (value[0] == ' ')
+               quote = 1;
+       for (i = 0; value[i]; i++)
+               if (value[i] == ';' || value[i] == '#')
+                       quote = 1;
+       if (value[i-1] == ' ')
+               quote = 1;
+
+       if (write_in_full(fd, "\t", 1) != 1 ||
+           write_in_full(fd, key+store.baselen+1, length) != length ||
+           write_in_full(fd, " = ", 3) != 3)
+               return 0;
+       if (quote && write_in_full(fd, "\"", 1) != 1)
+               return 0;
        for (i = 0; value[i]; i++)
                switch (value[i]) {
-               case '\n': write(fd, "\\n", 2); break;
-               case '\t': write(fd, "\\t", 2); break;
-               case '"': case '\\': write(fd, "\\", 1);
-               default: write(fd, value+i, 1);
-       }
-       write(fd, "\n", 1);
+               case '\n':
+                       if (write_in_full(fd, "\\n", 2) != 2)
+                               return 0;
+                       break;
+               case '\t':
+                       if (write_in_full(fd, "\\t", 2) != 2)
+                               return 0;
+                       break;
+               case '"':
+               case '\\':
+                       if (write_in_full(fd, "\\", 1) != 1)
+                               return 0;
+               default:
+                       if (write_in_full(fd, value+i, 1) != 1)
+                               return 0;
+                       break;
+               }
+       if (quote && write_in_full(fd, "\"", 1) != 1)
+               return 0;
+       if (write_in_full(fd, "\n", 1) != 1)
+               return 0;
+       return 1;
 }
 
 static int find_beginning_of_line(const char* contents, int size,
@@ -520,14 +620,14 @@ int git_config_set_multivar(const char* key, const char* value,
        char* lock_file;
        const char* last_dot = strrchr(key, '.');
 
-       config_filename = getenv("GIT_CONFIG");
+       config_filename = getenv(CONFIG_ENVIRONMENT);
        if (!config_filename) {
-               config_filename = getenv("GIT_CONFIG_LOCAL");
+               config_filename = getenv(CONFIG_LOCAL_ENVIRONMENT);
                if (!config_filename)
                        config_filename  = git_path("config");
        }
-       config_filename = strdup(config_filename);
-       lock_file = strdup(mkpath("%s.lock", config_filename));
+       config_filename = xstrdup(config_filename);
+       lock_file = xstrdup(mkpath("%s.lock", config_filename));
 
        /*
         * Since "key" actually contains the section name and the real
@@ -546,7 +646,7 @@ int git_config_set_multivar(const char* key, const char* value,
        /*
         * Validate the key and while at it, lower case it for matching.
         */
-       store.key = (char*)malloc(strlen(key)+1);
+       store.key = xmalloc(strlen(key) + 1);
        dot = 0;
        for (i = 0; key[i]; i++) {
                unsigned char c = key[i];
@@ -554,13 +654,18 @@ int git_config_set_multivar(const char* key, const char* value,
                        dot = 1;
                /* Leave the extended basename untouched.. */
                if (!dot || i > store.baselen) {
-                       if (!isalnum(c) || (i == store.baselen+1 && !isalpha(c))) {
+                       if (!iskeychar(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);
+               } else if (c == '\n') {
+                       fprintf(stderr, "invalid key (newline): %s\n", key);
+                       free(store.key);
+                       ret = 1;
+                       goto out_free;
                }
                store.key[i] = c;
        }
@@ -598,9 +703,10 @@ int git_config_set_multivar(const char* key, const char* value,
                }
 
                store.key = (char*)key;
-               store_write_section(fd, key);
-               store_write_pair(fd, key, value);
-       } else{
+               if (!store_write_section(fd, key) ||
+                   !store_write_pair(fd, key, value))
+                       goto write_err_out;
+       } else {
                struct stat st;
                char* contents;
                int i, copy_begin, copy_end, new_line = 0;
@@ -614,7 +720,7 @@ int git_config_set_multivar(const char* key, const char* value,
                        } else
                                store.do_not_match = 0;
 
-                       store.value_regex = (regex_t*)malloc(sizeof(regex_t));
+                       store.value_regex = (regex_t*)xmalloc(sizeof(regex_t));
                        if (regcomp(store.value_regex, value_regex,
                                        REG_EXTENDED)) {
                                fprintf(stderr, "Invalid pattern: %s\n",
@@ -660,7 +766,7 @@ int git_config_set_multivar(const char* key, const char* value,
                }
 
                fstat(in_fd, &st);
-               contents = mmap(NULL, st.st_size, PROT_READ,
+               contents = xmmap(NULL, st.st_size, PROT_READ,
                        MAP_PRIVATE, in_fd, 0);
                close(in_fd);
 
@@ -679,25 +785,33 @@ int git_config_set_multivar(const char* key, const char* value,
 
                        /* write the first part of the config */
                        if (copy_end > copy_begin) {
-                               write(fd, contents + copy_begin,
-                               copy_end - copy_begin);
-                               if (new_line)
-                                       write(fd, "\n", 1);
+                               if (write_in_full(fd, contents + copy_begin,
+                                                 copy_end - copy_begin) <
+                                   copy_end - copy_begin)
+                                       goto write_err_out;
+                               if (new_line &&
+                                   write_in_full(fd, "\n", 1) != 1)
+                                       goto write_err_out;
                        }
                        copy_begin = store.offset[i];
                }
 
                /* write the pair (value == NULL means unset) */
                if (value != NULL) {
-                       if (store.state == START)
-                               store_write_section(fd, key);
-                       store_write_pair(fd, key, value);
+                       if (store.state == START) {
+                               if (!store_write_section(fd, key))
+                                       goto write_err_out;
+                       }
+                       if (!store_write_pair(fd, key, value))
+                               goto write_err_out;
                }
 
                /* write the rest of the config */
                if (copy_begin < st.st_size)
-                       write(fd, contents + copy_begin,
-                               st.st_size - copy_begin);
+                       if (write_in_full(fd, contents + copy_begin,
+                                         st.st_size - copy_begin) <
+                           st.st_size - copy_begin)
+                               goto write_err_out;
 
                munmap(contents, st.st_size);
                unlink(config_filename);
@@ -714,13 +828,96 @@ int git_config_set_multivar(const char* key, const char* value,
 out_free:
        if (0 <= fd)
                close(fd);
-       if (config_filename)
-               free(config_filename);
+       free(config_filename);
        if (lock_file) {
                unlink(lock_file);
                free(lock_file);
        }
        return ret;
+
+write_err_out:
+       ret = write_error();
+       goto out_free;
+
 }
 
+int git_config_rename_section(const char *old_name, const char *new_name)
+{
+       int ret = 0;
+       char *config_filename;
+       struct lock_file *lock = xcalloc(sizeof(struct lock_file), 1);
+       int out_fd;
+       char buf[1024];
+
+       config_filename = getenv(CONFIG_ENVIRONMENT);
+       if (!config_filename) {
+               config_filename = getenv(CONFIG_LOCAL_ENVIRONMENT);
+               if (!config_filename)
+                       config_filename  = git_path("config");
+       }
+       config_filename = xstrdup(config_filename);
+       out_fd = hold_lock_file_for_update(lock, config_filename, 0);
+       if (out_fd < 0) {
+               ret = error("Could not lock config file!");
+               goto out;
+       }
+
+       if (!(config_file = fopen(config_filename, "rb"))) {
+               ret = error("Could not open config file!");
+               goto out;
+       }
+
+       while (fgets(buf, sizeof(buf), config_file)) {
+               int i;
+               int length;
+               for (i = 0; buf[i] && isspace(buf[i]); i++)
+                       ; /* do nothing */
+               if (buf[i] == '[') {
+                       /* it's a section */
+                       int j = 0, dot = 0;
+                       for (i++; buf[i] && buf[i] != ']'; i++) {
+                               if (!dot && isspace(buf[i])) {
+                                       dot = 1;
+                                       if (old_name[j++] != '.')
+                                               break;
+                                       for (i++; isspace(buf[i]); i++)
+                                               ; /* do nothing */
+                                       if (buf[i] != '"')
+                                               break;
+                                       continue;
+                               }
+                               if (buf[i] == '\\' && dot)
+                                       i++;
+                               else if (buf[i] == '"' && dot) {
+                                       for (i++; isspace(buf[i]); i++)
+                                               ; /* do_nothing */
+                                       break;
+                               }
+                               if (buf[i] != old_name[j++])
+                                       break;
+                       }
+                       if (buf[i] == ']' && old_name[j] == 0) {
+                               /* old_name matches */
+                               ret++;
+                               store.baselen = strlen(new_name);
+                               if (!store_write_section(out_fd, new_name)) {
+                                       ret = write_error();
+                                       goto out;
+                               }
+                               continue;
+                       }
+               }
+               length = strlen(buf);
+               if (write_in_full(out_fd, buf, length) != length) {
+                       ret = write_error();
+                       goto out;
+               }
+       }
+       fclose(config_file);
+       if (close(out_fd) || commit_lock_file(lock) < 0)
+                       ret = error("Cannot commit config file!");
+ out:
+       free(config_filename);
+       return ret;
+}