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[cmdline] Generate command option help text automatically

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Generate the command option help text automatically from the list of
defined options.

Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
2013-11-07 17:00:51 +00:00
parent 6871a8113f
commit 43eba2f555
22 changed files with 93 additions and 75 deletions
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53
src/hci/commands/image_cmd.c
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@@ -47,22 +47,22 @@ struct imgsingle_options {
};
/** "img{single}" option list */
static struct option_descriptor imgsingle_opts[] = {
OPTION_DESC ( "name", 'n', required_argument,
struct imgsingle_options, name, parse_string ),
OPTION_DESC ( "replace", 'r', no_argument,
struct imgsingle_options, replace, parse_flag ),
OPTION_DESC ( "autofree", 'a', no_argument,
struct imgsingle_options, autofree, parse_flag ),
static union {
/* "imgexec" takes all three options */
struct option_descriptor imgexec[3];
/* Other "img{single}" commands take only --name and --autofree */
struct option_descriptor imgsingle[2];
} opts = {
.imgexec = {
OPTION_DESC ( "name", 'n', required_argument,
struct imgsingle_options, name, parse_string ),
OPTION_DESC ( "autofree", 'a', no_argument,
struct imgsingle_options, autofree, parse_flag ),
OPTION_DESC ( "replace", 'r', no_argument,
struct imgsingle_options, replace, parse_flag ),
},
};
/** "img{single}" command descriptor */
static struct command_descriptor imgsingle_cmd =
COMMAND_DESC ( struct imgsingle_options, imgsingle_opts,
1, MAX_ARGUMENTS,
"[--name <name>] [--autofree] "
"<uri|image> [<arguments>...]" );
/** An "img{single}" family command descriptor */
struct imgsingle_descriptor {
/** Command descriptor */
@@ -174,9 +174,8 @@ static int imgsingle_exec ( int argc, char **argv,
/** "imgfetch" command descriptor */
static struct command_descriptor imgfetch_cmd =
COMMAND_DESC ( struct imgsingle_options, imgsingle_opts,
1, MAX_ARGUMENTS,
"[--name <name>] [--autofree] <uri> [<arguments>...]" );
COMMAND_DESC ( struct imgsingle_options, opts.imgsingle,
1, MAX_ARGUMENTS, "<uri> [<arguments>...]" );
/** "imgfetch" family command descriptor */
struct imgsingle_descriptor imgfetch_desc = {
@@ -207,9 +206,14 @@ static int imgselect ( struct image *image,
return image_select ( image );
}
/** "imgselect" command descriptor */
static struct command_descriptor imgselect_cmd =
COMMAND_DESC ( struct imgsingle_options, opts.imgsingle,
1, MAX_ARGUMENTS, "<uri|image> [<arguments>...]" );
/** "imgselect" family command descriptor */
struct imgsingle_descriptor imgselect_desc = {
.cmd = &imgsingle_cmd,
.cmd = &imgselect_cmd,
.acquire = imgacquire,
.action = imgselect,
.verb = "select",
@@ -228,10 +232,8 @@ static int imgselect_exec ( int argc, char **argv ) {
/** "imgexec" command descriptor */
static struct command_descriptor imgexec_cmd =
COMMAND_DESC ( struct imgsingle_options, imgsingle_opts,
0, MAX_ARGUMENTS,
"[--autofree] [--replace] "
"[<uri|image> [<arguments>...]]" );
COMMAND_DESC ( struct imgsingle_options, opts.imgexec,
0, MAX_ARGUMENTS, "[<uri|image> [<arguments>...]]" );
/**
* "imgexec" command action
@@ -282,9 +284,14 @@ static int imgexec_exec ( int argc, char **argv) {
return imgsingle_exec ( argc, argv, &imgexec_desc );
}
/** "imgargs" command descriptor */
static struct command_descriptor imgargs_cmd =
COMMAND_DESC ( struct imgsingle_options, opts.imgsingle,
1, MAX_ARGUMENTS, "<uri|image> [<arguments>...]" );
/** "imgargs" family command descriptor */
struct imgsingle_descriptor imgargs_desc = {
.cmd = &imgsingle_cmd,
.cmd = &imgargs_cmd,
.acquire = imgacquire,
.preaction = image_clear_cmdline,
};