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perf kvm: introduce --list-cmds for use by scripts

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Introduce

  $ perf kvm --list-cmds

to dump a raw list of commands for use by the completion script. In
order to do this, introduce parse_options_subcommand() for handling
subcommands as a special case in the parse-options machinery.

Signed-off-by: Ramkumar Ramachandra <artagnon@gmail.com>
Acked-by: David Ahern <dsahern@gmail.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: David Ahern <dsahern@gmail.com>
Link: http://lkml.kernel.org/r/1393896396-10427-1-git-send-email-artagnon@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Ramkumar Ramachandra
2014-03-03 20:26:36 -05:00
committed by Arnaldo Carvalho de Melo
parent 94a0793ddf
commit 09a71b97cc
4 changed files with 46 additions and 13 deletions
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37
tools/perf/util/parse-options.c
View File

@@ -407,7 +407,9 @@ int parse_options_step(struct parse_opt_ctx_t *ctx,
if (internal_help && !strcmp(arg + 2, "help"))
return usage_with_options_internal(usagestr, options, 0);
if (!strcmp(arg + 2, "list-opts"))
return PARSE_OPT_LIST;
return PARSE_OPT_LIST_OPTS;
if (!strcmp(arg + 2, "list-cmds"))
return PARSE_OPT_LIST_SUBCMDS;
switch (parse_long_opt(ctx, arg + 2, options)) {
case -1:
return parse_options_usage(usagestr, options, arg + 2, 0);
@@ -433,25 +435,45 @@ int parse_options_end(struct parse_opt_ctx_t *ctx)
return ctx->cpidx + ctx->argc;
}
int parse_options(int argc, const char **argv, const struct option *options,
const char * const usagestr[], int flags)
int parse_options_subcommand(int argc, const char **argv, const struct option *options,
const char *const subcommands[], const char *usagestr[], int flags)
{
struct parse_opt_ctx_t ctx;
perf_header__set_cmdline(argc, argv);
/* build usage string if it's not provided */
if (subcommands && !usagestr[0]) {
struct strbuf buf = STRBUF_INIT;
strbuf_addf(&buf, "perf %s [<options>] {", argv[0]);
for (int i = 0; subcommands[i]; i++) {
if (i)
strbuf_addstr(&buf, "|");
strbuf_addstr(&buf, subcommands[i]);
}
strbuf_addstr(&buf, "}");
usagestr[0] = strdup(buf.buf);
strbuf_release(&buf);
}
parse_options_start(&ctx, argc, argv, flags);
switch (parse_options_step(&ctx, options, usagestr)) {
case PARSE_OPT_HELP:
exit(129);
case PARSE_OPT_DONE:
break;
case PARSE_OPT_LIST:
case PARSE_OPT_LIST_OPTS:
while (options->type != OPTION_END) {
printf("--%s ", options->long_name);
options++;
}
exit(130);
case PARSE_OPT_LIST_SUBCMDS:
for (int i = 0; subcommands[i]; i++)
printf("%s ", subcommands[i]);
exit(130);
default: /* PARSE_OPT_UNKNOWN */
if (ctx.argv[0][1] == '-') {
error("unknown option `%s'", ctx.argv[0] + 2);
@@ -464,6 +486,13 @@ int parse_options(int argc, const char **argv, const struct option *options,
return parse_options_end(&ctx);
}
int parse_options(int argc, const char **argv, const struct option *options,
const char * const usagestr[], int flags)
{
return parse_options_subcommand(argc, argv, options, NULL,
(const char **) usagestr, flags);
}
#define USAGE_OPTS_WIDTH 24
#define USAGE_GAP 2