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help: use parseopt 

This patch converts cmd_help to use parseopt, along with a
few style cleanups, including:

  - enum constants are now ALL_CAPS

  - parse_help_format returns an enum value rather than
    setting a global as a side effect

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
maint
Jeff King 2008-02-24 17:16:55 -05:00 committed by Junio C Hamano
parent 923d44aeb7
commit 41eb33bd0c
1 changed files with 56 additions and 61 deletions
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117
help.c
View File

@ -7,40 +7,49 @@
#include "builtin.h"
#include "exec_cmd.h"
#include "common-cmds.h"
#include "parse-options.h"

static const char *help_default_format;
enum help_format {
HELP_FORMAT_MAN,
HELP_FORMAT_INFO,
HELP_FORMAT_WEB,
};

static enum help_format {
man_format,
info_format,
web_format,
} help_format = man_format;
static int show_all = 0;
static enum help_format help_format = HELP_FORMAT_MAN;
static struct option builtin_help_options[] = {
OPT_BOOLEAN('a', "all", &show_all, "print all available commands"),
OPT_SET_INT('m', "man", &help_format, "show man page", HELP_FORMAT_MAN),
OPT_SET_INT('w', "web", &help_format, "show manual in web browser",
HELP_FORMAT_WEB),
OPT_SET_INT('i', "info", &help_format, "show info page",
HELP_FORMAT_INFO),
};

static void parse_help_format(const char *format)
static const char * const builtin_help_usage[] = {
"git-help [--all] [--man|--web|--info] [command]",
NULL
};

static enum help_format parse_help_format(const char *format)
{
if (!format) {
help_format = man_format;
return;
}
if (!strcmp(format, "man")) {
help_format = man_format;
return;
}
if (!strcmp(format, "info")) {
help_format = info_format;
return;
}
if (!strcmp(format, "web") || !strcmp(format, "html")) {
help_format = web_format;
return;
}
if (!strcmp(format, "man"))
return HELP_FORMAT_MAN;
if (!strcmp(format, "info"))
return HELP_FORMAT_INFO;
if (!strcmp(format, "web") || !strcmp(format, "html"))
return HELP_FORMAT_WEB;
die("unrecognized help format '%s'", format);
}

static int git_help_config(const char *var, const char *value)
{
if (!strcmp(var, "help.format"))
return git_config_string(&help_default_format, var, value);
if (!strcmp(var, "help.format")) {
if (!value)
return config_error_nonbool(var);
help_format = parse_help_format(value);
return 0;
}
return git_default_config(var, value);
}

@ -362,50 +371,36 @@ int cmd_version(int argc, const char **argv, const char *prefix)

int cmd_help(int argc, const char **argv, const char *prefix)
{
const char *help_cmd = argv[1];
int nongit;

if (argc < 2) {
printf("usage: %s\n\n", git_usage_string);
list_common_cmds_help();
exit(0);
}
setup_git_directory_gently(&nongit);
git_config(git_help_config);

if (!strcmp(help_cmd, "--all") || !strcmp(help_cmd, "-a")) {
argc = parse_options(argc, argv, builtin_help_options,
builtin_help_usage, 0);

if (show_all) {
printf("usage: %s\n\n", git_usage_string);
list_commands();
return 0;
}

else if (!strcmp(help_cmd, "--web") || !strcmp(help_cmd, "-w")) {
show_html_page(argc > 2 ? argv[2] : NULL);
if (!argv[0]) {
printf("usage: %s\n\n", git_usage_string);
list_common_cmds_help();
return 0;
}

else if (!strcmp(help_cmd, "--info") || !strcmp(help_cmd, "-i")) {
show_info_page(argc > 2 ? argv[2] : NULL);
}

else if (!strcmp(help_cmd, "--man") || !strcmp(help_cmd, "-m")) {
show_man_page(argc > 2 ? argv[2] : NULL);
}

else {
int nongit;

setup_git_directory_gently(&nongit);
git_config(git_help_config);
if (help_default_format)
parse_help_format(help_default_format);

switch (help_format) {
case man_format:
show_man_page(help_cmd);
break;
case info_format:
show_info_page(help_cmd);
break;
case web_format:
show_html_page(help_cmd);
break;
}
switch (help_format) {
case HELP_FORMAT_MAN:
show_man_page(argv[0]);
break;
case HELP_FORMAT_INFO:
show_info_page(argv[0]);
break;
case HELP_FORMAT_WEB:
show_html_page(argv[0]);
break;
}

return 0;