git config: reorganize to use parseopt

This patch has benefited from comments by Johannes
Schindelin and Junio C Hamano.

Signed-off-by: Felipe Contreras <felipe.contreras@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/builtin-config.c b/builtin-config.c
index a2ef5f7c084515f3ed6bfabb86faa862ef5cfd75..08a77cd7df4c834eb6cde85d3840713848e43e03 100644 (file)
--- a/builtin-config.c
+++ b/builtin-config.c
@@ -1,9 +1,12 @@
 #include "builtin.h"
 #include "cache.h"
 #include "color.h"
+#include "parse-options.h"
 
-static const char git_config_set_usage[] =
-"git config [ --global | --system | [ -f | --file ] config-file ] [ --bool | --int | --bool-or-int ] [ -z | --null ] [--get | --get-all | --get-regexp | --replace-all | --add | --unset | --unset-all] name [value [value_regex]] | --rename-section old_name new_name | --remove-section name | --list | --get-color var [default] | --get-colorbool name [stdout-is-tty] | --edit | -e ]";
+static const char *const builtin_config_usage[] = {
+       "git config [options]",
+       NULL
+};
 
 static char *key;
 static regex_t *key_regexp;
@@ -18,6 +21,63 @@ static char key_delim = ' ';
 static char term = '\n';
 static enum { T_RAW, T_INT, T_BOOL, T_BOOL_OR_INT } type = T_RAW;
 
+static int use_global_config, use_system_config;
+static const char *given_config_file;
+static int actions;
+static const char *get_color_slot, *get_colorbool_slot;
+static int end_null;
+
+#define ACTION_GET (1<<0)
+#define ACTION_GET_ALL (1<<1)
+#define ACTION_GET_REGEXP (1<<2)
+#define ACTION_REPLACE_ALL (1<<3)
+#define ACTION_ADD (1<<4)
+#define ACTION_UNSET (1<<5)
+#define ACTION_UNSET_ALL (1<<6)
+#define ACTION_RENAME_SECTION (1<<7)
+#define ACTION_REMOVE_SECTION (1<<8)
+#define ACTION_LIST (1<<9)
+#define ACTION_EDIT (1<<10)
+#define ACTION_SET (1<<11)
+#define ACTION_SET_ALL (1<<12)
+#define ACTION_GET_COLOR (1<<13)
+#define ACTION_GET_COLORBOOL (1<<14)
+
+static struct option builtin_config_options[] = {
+       OPT_GROUP("Config file location"),
+       OPT_BOOLEAN(0, "global", &use_global_config, "use global config file"),
+       OPT_BOOLEAN(0, "system", &use_system_config, "use system config file"),
+       OPT_STRING('f', "file", &given_config_file, "FILE", "use given config file"),
+       OPT_GROUP("Action"),
+       OPT_BIT(0, "get", &actions, "get value: name [value-regex]", ACTION_GET),
+       OPT_BIT(0, "get-all", &actions, "get all values: key [value-regex]", ACTION_GET_ALL),
+       OPT_BIT(0, "get-regexp", &actions, "get values for regexp: name-regex [value-regex]", ACTION_GET_REGEXP),
+       OPT_BIT(0, "replace-all", &actions, "replace all matching variables: name [value [value_regex]", ACTION_REPLACE_ALL),
+       OPT_BIT(0, "add", &actions, "adds a new variable: name value", ACTION_ADD),
+       OPT_BIT(0, "unset", &actions, "removes a variable: name [value-regex]", ACTION_UNSET),
+       OPT_BIT(0, "unset-all", &actions, "removes all matches: name [value-regex]", ACTION_UNSET_ALL),
+       OPT_BIT(0, "rename-section", &actions, "rename section: old-name new-name", ACTION_RENAME_SECTION),
+       OPT_BIT(0, "remove-section", &actions, "remove a section: name", ACTION_REMOVE_SECTION),
+       OPT_BIT('l', "list", &actions, "list all", ACTION_LIST),
+       OPT_BIT('e', "edit", &actions, "opens an editor", ACTION_EDIT),
+       OPT_STRING(0, "get-color", &get_color_slot, "slot", "find the color configured: [default]"),
+       OPT_STRING(0, "get-colorbool", &get_colorbool_slot, "slot", "find the color setting: [stdout-is-tty]"),
+       OPT_GROUP("Type"),
+       OPT_SET_INT(0, "bool", &type, "value is \"true\" or \"false\"", T_BOOL),
+       OPT_SET_INT(0, "int", &type, "value is decimal number", T_INT),
+       OPT_SET_INT(0, "bool-or-int", &type, NULL, T_BOOL_OR_INT),
+       OPT_GROUP("Other"),
+       OPT_BOOLEAN('z', "null", &end_null, "terminate values with NUL byte"),
+       OPT_END(),
+};
+
+static void check_argc(int argc, int min, int max) {
+       if (argc >= min && argc <= max)
+               return;
+       error("wrong number of arguments");
+       usage_with_options(builtin_config_usage, builtin_config_options);
+}
+
 static int show_all_config(const char *key_, const char *value_, void *cb)
 {
        if (value_)
@@ -253,162 +313,143 @@ int cmd_config(int argc, const char **argv, const char *unused_prefix)
 
        config_exclusive_filename = getenv(CONFIG_ENVIRONMENT);
 
-       while (1 < argc) {
-               if (!strcmp(argv[1], "--int"))
-                       type = T_INT;
-               else if (!strcmp(argv[1], "--bool"))
-                       type = T_BOOL;
-               else if (!strcmp(argv[1], "--bool-or-int"))
-                       type = T_BOOL_OR_INT;
-               else if (!strcmp(argv[1], "--list") || !strcmp(argv[1], "-l")) {
-                       if (argc != 2)
-                               usage(git_config_set_usage);
-                       if (git_config(show_all_config, NULL) < 0) {
-                               if (config_exclusive_filename)
-                                       die("unable to read config file %s: %s",
-                                           config_exclusive_filename, strerror(errno));
-                               else
-                                       die("error processing config file(s)");
-                       }
-                       return 0;
-               }
-               else if (!strcmp(argv[1], "--global")) {
-                       char *home = getenv("HOME");
-                       if (home) {
-                               char *user_config = xstrdup(mkpath("%s/.gitconfig", home));
-                               config_exclusive_filename = user_config;
-                       } else {
-                               die("$HOME not set");
-                       }
-               }
-               else if (!strcmp(argv[1], "--system"))
-                       config_exclusive_filename = git_etc_gitconfig();
-               else if (!strcmp(argv[1], "--file") || !strcmp(argv[1], "-f")) {
-                       if (argc < 3)
-                               usage(git_config_set_usage);
-                       if (!is_absolute_path(argv[2]) && prefix)
-                               config_exclusive_filename = prefix_filename(prefix,
-                                                                           strlen(prefix),
-                                                                           argv[2]);
-                       else
-                               config_exclusive_filename = argv[2];
-                       argc--;
-                       argv++;
-               }
-               else if (!strcmp(argv[1], "--null") || !strcmp(argv[1], "-z")) {
-                       term = '\0';
-                       delim = '\n';
-                       key_delim = '\n';
-               }
-               else if (!strcmp(argv[1], "--rename-section")) {
-                       int ret;
-                       if (argc != 4)
-                               usage(git_config_set_usage);
-                       ret = git_config_rename_section(argv[2], argv[3]);
-                       if (ret < 0)
-                               return ret;
-                       if (ret == 0) {
-                               fprintf(stderr, "No such section!\n");
-                               return 1;
-                       }
-                       return 0;
-               }
-               else if (!strcmp(argv[1], "--remove-section")) {
-                       int ret;
-                       if (argc != 3)
-                               usage(git_config_set_usage);
-                       ret = git_config_rename_section(argv[2], NULL);
-                       if (ret < 0)
-                               return ret;
-                       if (ret == 0) {
-                               fprintf(stderr, "No such section!\n");
-                               return 1;
-                       }
-                       return 0;
-               } else if (!strcmp(argv[1], "--get-color")) {
-                       if (argc > 4 || argc < 3)
-                               usage(git_config_set_usage);
-                       get_color_slot = argv[2];
-                       get_color(argv[3]);
-                       return 0;
-               } else if (!strcmp(argv[1], "--get-colorbool")) {
-                       if (argc == 4)
-                               stdout_is_tty = git_config_bool("command line", argv[3]);
-                       else if (argc == 3)
-                               stdout_is_tty = isatty(1);
-                       else
-                               usage(git_config_set_usage);
-                       get_colorbool_slot = argv[2];
-                       return get_colorbool(argc != 3);
-               } else if (!strcmp(argv[1], "--edit") || !strcmp(argv[1], "-e")) {
-                       if (argc != 2)
-                               usage(git_config_set_usage);
-                       git_config(git_default_config, NULL);
-                       launch_editor(config_exclusive_filename ?
-                                     config_exclusive_filename : git_path("config"),
-                                     NULL, NULL);
-                       return 0;
-               } else
-                       break;
-               argc--;
-               argv++;
-       }
-
-       switch (argc) {
-       case 2:
-               return get_value(argv[1], NULL);
-       case 3:
-               if (!strcmp(argv[1], "--unset"))
-                       return git_config_set(argv[2], NULL);
-               else if (!strcmp(argv[1], "--unset-all"))
-                       return git_config_set_multivar(argv[2], NULL, NULL, 1);
-               else if (!strcmp(argv[1], "--get"))
-                       return get_value(argv[2], NULL);
-               else if (!strcmp(argv[1], "--get-all")) {
-                       do_all = 1;
-                       return get_value(argv[2], NULL);
-               } else if (!strcmp(argv[1], "--get-regexp")) {
-                       show_keys = 1;
-                       use_key_regexp = 1;
-                       do_all = 1;
-                       return get_value(argv[2], NULL);
+       argc = parse_options(argc, argv, builtin_config_options, builtin_config_usage,
+                            PARSE_OPT_STOP_AT_NON_OPTION);
+
+       if (use_global_config) {
+               char *home = getenv("HOME");
+               if (home) {
+                       char *user_config = xstrdup(mkpath("%s/.gitconfig", home));
+                       config_exclusive_filename = user_config;
                } else {
-                       value = normalize_value(argv[1], argv[2]);
-                       return git_config_set(argv[1], value);
+                       die("$HOME not set");
                }
-       case 4:
-               if (!strcmp(argv[1], "--unset"))
-                       return git_config_set_multivar(argv[2], NULL, argv[3], 0);
-               else if (!strcmp(argv[1], "--unset-all"))
-                       return git_config_set_multivar(argv[2], NULL, argv[3], 1);
-               else if (!strcmp(argv[1], "--get"))
-                       return get_value(argv[2], argv[3]);
-               else if (!strcmp(argv[1], "--get-all")) {
-                       do_all = 1;
-                       return get_value(argv[2], argv[3]);
-               } else if (!strcmp(argv[1], "--get-regexp")) {
-                       show_keys = 1;
-                       use_key_regexp = 1;
-                       do_all = 1;
-                       return get_value(argv[2], argv[3]);
-               } else if (!strcmp(argv[1], "--add")) {
-                       value = normalize_value(argv[2], argv[3]);
-                       return git_config_set_multivar(argv[2], value, "^$", 0);
-               } else if (!strcmp(argv[1], "--replace-all")) {
-                       value = normalize_value(argv[2], argv[3]);
-                       return git_config_set_multivar(argv[2], value, NULL, 1);
-               } else {
-                       value = normalize_value(argv[1], argv[2]);
-                       return git_config_set_multivar(argv[1], value, argv[3], 0);
+       }
+       else if (use_system_config)
+               config_exclusive_filename = git_etc_gitconfig();
+       else if (given_config_file) {
+               if (!is_absolute_path(given_config_file) && prefix)
+                       config_exclusive_filename = prefix_filename(prefix,
+                                                                   strlen(prefix),
+                                                                   argv[2]);
+               else
+                       config_exclusive_filename = given_config_file;
+       }
+
+       if (end_null) {
+               term = '\0';
+               delim = '\n';
+               key_delim = '\n';
+       }
+
+       if (get_color_slot)
+           actions |= ACTION_GET_COLOR;
+       if (get_colorbool_slot)
+           actions |= ACTION_GET_COLORBOOL;
+
+       if (HAS_MULTI_BITS(actions)) {
+               error("only one action at a time.");
+               usage_with_options(builtin_config_usage, builtin_config_options);
+       }
+       if (actions == 0)
+               switch (argc) {
+               case 1: actions = ACTION_GET; break;
+               case 2: actions = ACTION_SET; break;
+               case 3: actions = ACTION_SET_ALL; break;
+               default:
+                       usage_with_options(builtin_config_usage, builtin_config_options);
                }
-       case 5:
-               if (!strcmp(argv[1], "--replace-all")) {
-                       value = normalize_value(argv[2], argv[3]);
-                       return git_config_set_multivar(argv[2], value, argv[4], 1);
+
+       if (actions == ACTION_LIST) {
+               if (git_config(show_all_config, NULL) < 0) {
+                       if (config_exclusive_filename)
+                               die("unable to read config file %s: %s",
+                                   config_exclusive_filename, strerror(errno));
+                       else
+                               die("error processing config file(s)");
                }
-       case 1:
-       default:
-               usage(git_config_set_usage);
        }
+       else if (actions == ACTION_EDIT) {
+               git_config(git_default_config, NULL);
+               launch_editor(config_exclusive_filename ?
+                             config_exclusive_filename : git_path("config"),
+                             NULL, NULL);
+       }
+       else if (actions == ACTION_SET) {
+               check_argc(argc, 2, 2);
+               value = normalize_value(argv[0], argv[1]);
+               return git_config_set(argv[0], value);
+       }
+       else if (actions == ACTION_SET_ALL) {
+               check_argc(argc, 2, 3);
+               value = normalize_value(argv[0], argv[1]);
+               return git_config_set_multivar(argv[0], value, argv[2], 0);
+       }
+       else if (actions == ACTION_ADD) {
+               check_argc(argc, 2, 2);
+               value = normalize_value(argv[0], argv[1]);
+               return git_config_set_multivar(argv[0], value, "^$", 0);
+       }
+       else if (actions == ACTION_REPLACE_ALL) {
+               check_argc(argc, 2, 3);
+               value = normalize_value(argv[0], argv[1]);
+               return git_config_set_multivar(argv[0], value, argv[2], 1);
+       }
+       else if (actions == ACTION_GET) {
+               check_argc(argc, 1, 2);
+               return get_value(argv[0], argv[1]);
+       }
+       else if (actions == ACTION_GET_ALL) {
+               do_all = 1;
+               check_argc(argc, 1, 2);
+               return get_value(argv[0], argv[1]);
+       }
+       else if (actions == ACTION_GET_REGEXP) {
+               show_keys = 1;
+               use_key_regexp = 1;
+               do_all = 1;
+               check_argc(argc, 1, 2);
+               return get_value(argv[0], argv[1]);
+       }
+       else if (actions == ACTION_UNSET) {
+               check_argc(argc, 1, 2);
+               if (argc == 2)
+                       return git_config_set_multivar(argv[0], NULL, argv[1], 0);
+               else
+                       return git_config_set(argv[0], NULL);
+       }
+       else if (actions == ACTION_UNSET_ALL) {
+               check_argc(argc, 1, 2);
+               return git_config_set_multivar(argv[0], NULL, argv[1], 1);
+       }
+       else if (actions == ACTION_RENAME_SECTION) {
+               int ret;
+               check_argc(argc, 2, 2);
+               ret = git_config_rename_section(argv[0], argv[1]);
+               if (ret < 0)
+                       return ret;
+               if (ret == 0)
+                       die("No such section!");
+       }
+       else if (actions == ACTION_REMOVE_SECTION) {
+               int ret;
+               check_argc(argc, 1, 1);
+               ret = git_config_rename_section(argv[0], NULL);
+               if (ret < 0)
+                       return ret;
+               if (ret == 0)
+                       die("No such section!");
+       }
+       else if (actions == ACTION_GET_COLOR) {
+               get_color(argv[0]);
+       }
+       else if (actions == ACTION_GET_COLORBOOL) {
+               if (argc == 1)
+                       stdout_is_tty = git_config_bool("command line", argv[0]);
+               else if (argc == 0)
+                       stdout_is_tty = isatty(1);
+               return get_colorbool(argc != 0);
+       }
+
        return 0;
 }