Add corner case tests for diff-index and diff-files
[gitweb.git] / config.c
index ed96213c44265289c26d46edaaf740cebd0b4c86..062449459e1a4cfc2a605c065ed281669e0e7452 100644 (file)
--- a/config.c
+++ b/config.c
@@ -13,6 +13,7 @@
 static FILE *config_file;
 static const char *config_file_name;
 static int config_linenr;
+static int config_file_eof;
 static int zlib_compression_seen;
 
 static int get_next_char(void)
@@ -34,7 +35,7 @@ static int get_next_char(void)
                if (c == '\n')
                        config_linenr++;
                if (c == EOF) {
-                       config_file = NULL;
+                       config_file_eof = 1;
                        c = '\n';
                }
        }
@@ -118,7 +119,7 @@ static int get_value(config_fn_t fn, char *name, unsigned int len)
        /* Get the full name */
        for (;;) {
                c = get_next_char();
-               if (c == EOF)
+               if (config_file_eof)
                        break;
                if (!iskeychar(c))
                        break;
@@ -182,7 +183,7 @@ static int get_base_var(char *name)
 
        for (;;) {
                int c = get_next_char();
-               if (c == EOF)
+               if (config_file_eof)
                        return -1;
                if (c == ']')
                        return baselen;
@@ -205,8 +206,7 @@ static int git_parse_file(config_fn_t fn)
        for (;;) {
                int c = get_next_char();
                if (c == '\n') {
-                       /* EOF? */
-                       if (!config_file)
+                       if (config_file_eof)
                                return 0;
                        comment = 0;
                        continue;
@@ -234,17 +234,23 @@ static int git_parse_file(config_fn_t fn)
        die("bad config file line %d in %s", config_linenr, config_file_name);
 }
 
-static unsigned long get_unit_factor(const char *end)
+static int parse_unit_factor(const char *end, unsigned long *val)
 {
        if (!*end)
                return 1;
-       else if (!strcasecmp(end, "k"))
-               return 1024;
-       else if (!strcasecmp(end, "m"))
-               return 1024 * 1024;
-       else if (!strcasecmp(end, "g"))
-               return 1024 * 1024 * 1024;
-       die("unknown unit: '%s'", end);
+       else if (!strcasecmp(end, "k")) {
+               *val *= 1024;
+               return 1;
+       }
+       else if (!strcasecmp(end, "m")) {
+               *val *= 1024 * 1024;
+               return 1;
+       }
+       else if (!strcasecmp(end, "g")) {
+               *val *= 1024 * 1024 * 1024;
+               return 1;
+       }
+       return 0;
 }
 
 int git_parse_long(const char *value, long *ret)
@@ -252,7 +258,10 @@ int git_parse_long(const char *value, long *ret)
        if (value && *value) {
                char *end;
                long val = strtol(value, &end, 0);
-               *ret = val * get_unit_factor(end);
+               unsigned long factor = 1;
+               if (!parse_unit_factor(end, &factor))
+                       return 0;
+               *ret = val * factor;
                return 1;
        }
        return 0;
@@ -263,17 +272,26 @@ int git_parse_ulong(const char *value, unsigned long *ret)
        if (value && *value) {
                char *end;
                unsigned long val = strtoul(value, &end, 0);
-               *ret = val * get_unit_factor(end);
+               if (!parse_unit_factor(end, &val))
+                       return 0;
+               *ret = val;
                return 1;
        }
        return 0;
 }
 
+static void die_bad_config(const char *name)
+{
+       if (config_file_name)
+               die("bad config value for '%s' in %s", name, config_file_name);
+       die("bad config value for '%s'", name);
+}
+
 int git_config_int(const char *name, const char *value)
 {
        long ret;
        if (!git_parse_long(value, &ret))
-               die("bad config value for '%s' in %s", name, config_file_name);
+               die_bad_config(name);
        return ret;
 }
 
@@ -281,7 +299,7 @@ unsigned long git_config_ulong(const char *name, const char *value)
 {
        unsigned long ret;
        if (!git_parse_ulong(value, &ret))
-               die("bad config value for '%s' in %s", name, config_file_name);
+               die_bad_config(name);
        return ret;
 }
 
@@ -298,6 +316,14 @@ int git_config_bool(const char *name, const char *value)
        return git_config_int(name, value) != 0;
 }
 
+int git_config_string(const char **dest, const char *var, const char *value)
+{
+       if (!value)
+               return config_error_nonbool(var);
+       *dest = xstrdup(value);
+       return 0;
+}
+
 int git_default_config(const char *var, const char *value)
 {
        /* This needs a better name */
@@ -396,46 +422,61 @@ int git_default_config(const char *var, const char *value)
                return 0;
        }
 
+       if (!strcmp(var, "core.safecrlf")) {
+               if (value && !strcasecmp(value, "warn")) {
+                       safe_crlf = SAFE_CRLF_WARN;
+                       return 0;
+               }
+               safe_crlf = git_config_bool(var, value);
+               return 0;
+       }
+
        if (!strcmp(var, "user.name")) {
+               if (!value)
+                       return config_error_nonbool(var);
                strlcpy(git_default_name, value, sizeof(git_default_name));
                return 0;
        }
 
        if (!strcmp(var, "user.email")) {
+               if (!value)
+                       return config_error_nonbool(var);
                strlcpy(git_default_email, value, sizeof(git_default_email));
                return 0;
        }
 
-       if (!strcmp(var, "i18n.commitencoding")) {
-               git_commit_encoding = xstrdup(value);
-               return 0;
-       }
-
-       if (!strcmp(var, "i18n.logoutputencoding")) {
-               git_log_output_encoding = xstrdup(value);
-               return 0;
-       }
+       if (!strcmp(var, "i18n.commitencoding"))
+               return git_config_string(&git_commit_encoding, var, value);
 
+       if (!strcmp(var, "i18n.logoutputencoding"))
+               return git_config_string(&git_log_output_encoding, var, value);
 
        if (!strcmp(var, "pager.color") || !strcmp(var, "color.pager")) {
                pager_use_color = git_config_bool(var,value);
                return 0;
        }
 
-       if (!strcmp(var, "core.pager")) {
-               pager_program = xstrdup(value);
-               return 0;
-       }
+       if (!strcmp(var, "core.pager"))
+               return git_config_string(&pager_program, var, value);
 
-       if (!strcmp(var, "core.editor")) {
-               editor_program = xstrdup(value);
-               return 0;
-       }
+       if (!strcmp(var, "core.editor"))
+               return git_config_string(&editor_program, var, value);
+
+       if (!strcmp(var, "core.excludesfile"))
+               return git_config_string(&excludes_file, var, value);
 
-       if (!strcmp(var, "core.excludesfile")) {
+       if (!strcmp(var, "core.whitespace")) {
                if (!value)
-                       die("core.excludesfile without value");
-               excludes_file = xstrdup(value);
+                       return config_error_nonbool(var);
+               whitespace_rule_cfg = parse_whitespace_rule(value);
+               return 0;
+       }
+       if (!strcmp(var, "branch.autosetupmerge")) {
+               if (value && !strcasecmp(value, "always")) {
+                       git_branch_track = BRANCH_TRACK_ALWAYS;
+                       return 0;
+               }
+               git_branch_track = git_config_bool(var, value);
                return 0;
        }
 
@@ -453,6 +494,7 @@ int git_config_from_file(config_fn_t fn, const char *filename)
                config_file = f;
                config_file_name = filename;
                config_linenr = 1;
+               config_file_eof = 0;
                ret = git_parse_file(fn);
                fclose(f);
                config_file_name = NULL;
@@ -467,14 +509,30 @@ const char *git_etc_gitconfig(void)
                system_wide = ETC_GITCONFIG;
                if (!is_absolute_path(system_wide)) {
                        /* interpret path relative to exec-dir */
-                       const char *exec_path = git_exec_path();
-                       system_wide = prefix_path(exec_path, strlen(exec_path),
-                                               system_wide);
+                       struct strbuf d = STRBUF_INIT;
+                       strbuf_addf(&d, "%s/%s", git_exec_path(), system_wide);
+                       system_wide = strbuf_detach(&d, NULL);
                }
        }
        return system_wide;
 }
 
+int git_env_bool(const char *k, int def)
+{
+       const char *v = getenv(k);
+       return v ? git_config_bool(k, v) : def;
+}
+
+int git_config_system(void)
+{
+       return !git_env_bool("GIT_CONFIG_NOSYSTEM", 0);
+}
+
+int git_config_global(void)
+{
+       return !git_env_bool("GIT_CONFIG_NOGLOBAL", 0);
+}
+
 int git_config(config_fn_t fn)
 {
        int ret = 0;
@@ -487,7 +545,7 @@ int git_config(config_fn_t fn)
         * config file otherwise. */
        filename = getenv(CONFIG_ENVIRONMENT);
        if (!filename) {
-               if (!access(git_etc_gitconfig(), R_OK))
+               if (git_config_system() && !access(git_etc_gitconfig(), R_OK))
                        ret += git_config_from_file(fn, git_etc_gitconfig());
                home = getenv("HOME");
                filename = getenv(CONFIG_LOCAL_ENVIRONMENT);
@@ -495,7 +553,7 @@ int git_config(config_fn_t fn)
                        filename = repo_config = xstrdup(git_path("config"));
        }
 
-       if (home) {
+       if (git_config_global() && home) {
                char *user_config = xstrdup(mkpath("%s/.gitconfig", home));
                if (!access(user_config, R_OK))
                        ret = git_config_from_file(fn, user_config);
@@ -605,86 +663,77 @@ static int write_error(void)
 
 static int store_write_section(int fd, const char* key)
 {
-       const char *dot = strchr(key, '.');
-       int len1 = store.baselen, len2 = -1;
+       const char *dot;
+       int i, success;
+       struct strbuf sb;
 
-       dot = strchr(key, '.');
+       strbuf_init(&sb, 0);
+       dot = memchr(key, '.', store.baselen);
        if (dot) {
-               int dotlen = dot - key;
-               if (dotlen < len1) {
-                       len2 = len1 - dotlen - 1;
-                       len1 = dotlen;
+               strbuf_addf(&sb, "[%.*s \"", (int)(dot - key), key);
+               for (i = dot - key + 1; i < store.baselen; i++) {
+                       if (key[i] == '"')
+                               strbuf_addch(&sb, '\\');
+                       strbuf_addch(&sb, key[i]);
                }
+               strbuf_addstr(&sb, "\"]\n");
+       } else {
+               strbuf_addf(&sb, "[%.*s]\n", store.baselen, key);
        }
 
-       if (write_in_full(fd, "[", 1) != 1 ||
-           write_in_full(fd, key, len1) != len1)
-               return 0;
-       if (len2 >= 0) {
-               if (write_in_full(fd, " \"", 2) != 2)
-                       return 0;
-               while (--len2 >= 0) {
-                       unsigned char c = *++dot;
-                       if (c == '"')
-                               if (write_in_full(fd, "\\", 1) != 1)
-                                       return 0;
-                       if (write_in_full(fd, &c, 1) != 1)
-                               return 0;
-               }
-               if (write_in_full(fd, "\"", 1) != 1)
-                       return 0;
-       }
-       if (write_in_full(fd, "]\n", 2) != 2)
-               return 0;
+       success = write_in_full(fd, sb.buf, sb.len) == sb.len;
+       strbuf_release(&sb);
 
-       return 1;
+       return success;
 }
 
 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;
+       int i, success;
+       int length = strlen(key + store.baselen + 1);
+       const char *quote = "";
+       struct strbuf sb;
 
-       /* Check to see if the value needs to be quoted. */
+       /*
+        * Check to see if the value needs to be surrounded with a dq pair.
+        * Note that problematic characters are always backslash-quoted; this
+        * check is about not losing leading or trailing SP and strings that
+        * follow beginning-of-comment characters (i.e. ';' and '#') by the
+        * configuration parser.
+        */
        if (value[0] == ' ')
-               quote = 1;
+               quote = "\"";
        for (i = 0; value[i]; i++)
                if (value[i] == ';' || value[i] == '#')
-                       quote = 1;
-       if (value[i-1] == ' ')
-               quote = 1;
+                       quote = "\"";
+       if (i && value[i - 1] == ' ')
+               quote = "\"";
+
+       strbuf_init(&sb, 0);
+       strbuf_addf(&sb, "\t%.*s = %s",
+                   length, key + store.baselen + 1, quote);
 
-       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':
-                       if (write_in_full(fd, "\\n", 2) != 2)
-                               return 0;
+                       strbuf_addstr(&sb, "\\n");
                        break;
                case '\t':
-                       if (write_in_full(fd, "\\t", 2) != 2)
-                               return 0;
+                       strbuf_addstr(&sb, "\\t");
                        break;
                case '"':
                case '\\':
-                       if (write_in_full(fd, "\\", 1) != 1)
-                               return 0;
+                       strbuf_addch(&sb, '\\');
                default:
-                       if (write_in_full(fd, value+i, 1) != 1)
-                               return 0;
+                       strbuf_addch(&sb, value[i]);
                        break;
                }
-       if (quote && write_in_full(fd, "\"", 1) != 1)
-               return 0;
-       if (write_in_full(fd, "\n", 1) != 1)
-               return 0;
-       return 1;
+       strbuf_addf(&sb, "%s\n", quote);
+
+       success = write_in_full(fd, sb.buf, sb.len) == sb.len;
+       strbuf_release(&sb);
+
+       return success;
 }
 
 static ssize_t find_beginning_of_line(const char* contents, size_t size,
@@ -693,12 +742,17 @@ static ssize_t find_beginning_of_line(const char* contents, size_t size,
        size_t equal_offset = size, bracket_offset = size;
        ssize_t offset;
 
+contline:
        for (offset = offset_-2; offset > 0
                        && contents[offset] != '\n'; offset--)
                switch (contents[offset]) {
                        case '=': equal_offset = offset; break;
                        case ']': bracket_offset = offset; break;
                }
+       if (offset > 0 && contents[offset-1] == '\\') {
+               offset_ = offset;
+               goto contline;
+       }
        if (bracket_offset < equal_offset) {
                *found_bracket = 1;
                offset = bracket_offset+1;
@@ -911,6 +965,9 @@ int git_config_set_multivar(const char* key, const char* value,
                                        contents, contents_sz,
                                        store.offset[i]-2, &new_line);
 
+                       if (copy_end > 0 && contents[copy_end-1] != '\n')
+                               new_line = 1;
+
                        /* write the first part of the config */
                        if (copy_end > copy_begin) {
                                if (write_in_full(fd, contents + copy_begin,
@@ -944,14 +1001,12 @@ int git_config_set_multivar(const char* key, const char* value,
                munmap(contents, contents_sz);
        }
 
-       if (close(fd) || commit_lock_file(lock) < 0) {
+       if (commit_lock_file(lock) < 0) {
                fprintf(stderr, "Cannot commit config file!\n");
                ret = 4;
                goto out_free;
        }
 
-       /* fd is closed, so don't try to close it below. */
-       fd = -1;
        /*
         * lock is committed, so don't try to roll it back below.
         * NOTE: Since lockfile.c keeps a linked list of all created
@@ -962,8 +1017,6 @@ int git_config_set_multivar(const char* key, const char* value,
        ret = 0;
 
 out_free:
-       if (0 <= fd)
-               close(fd);
        if (lock)
                rollback_lock_file(lock);
        free(config_filename);
@@ -1061,9 +1114,18 @@ int git_config_rename_section(const char *old_name, const char *new_name)
        }
        fclose(config_file);
  unlock_and_out:
-       if (close(out_fd) || commit_lock_file(lock) < 0)
+       if (commit_lock_file(lock) < 0)
                        ret = error("Cannot commit config file!");
  out:
        free(config_filename);
        return ret;
 }
+
+/*
+ * Call this to report error for your variable that should not
+ * get a boolean value (i.e. "[my] var" means "true").
+ */
+int config_error_nonbool(const char *var)
+{
+       return error("Missing value for '%s'", var);
+}