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

Browse Source 
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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12
tools/perf/builtin-kvm.c
View File

@ -1691,17 +1691,15 @@ int cmd_kvm(int argc, const char **argv, const char *prefix __maybe_unused)
OPT_END()
};
const char * const kvm_usage[] = {
"perf kvm [<options>] {top|record|report|diff|buildid-list|stat}",
NULL
};
const char *const kvm_subcommands[] = { "top", "record", "report", "diff",
"buildid-list", "stat", NULL };
const char *kvm_usage[] = { NULL, NULL };
perf_host = 0;
perf_guest = 1;
argc = parse_options(argc, argv, kvm_options, kvm_usage,
PARSE_OPT_STOP_AT_NON_OPTION);
argc = parse_options_subcommand(argc, argv, kvm_options, kvm_subcommands, kvm_usage,
PARSE_OPT_STOP_AT_NON_OPTION);
if (!argc)
usage_with_options(kvm_usage, kvm_options);

2
tools/perf/perf-completion.sh
View File

@ -123,7 +123,7 @@ __perf_main ()
__perfcomp_colon "$evts" "$cur"
# List subcommands for 'perf kvm'
elif [[ $prev == "kvm" ]]; then
subcmds="top record report diff buildid-list stat"
subcmds=$($cmd $prev --list-cmds)
__perfcomp_colon "$subcmds" "$cur"
# List long option names
elif [[ $cur == --* ]]; then

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

8
tools/perf/util/parse-options.h
View File

@ -140,6 +140,11 @@ extern int parse_options(int argc, const char **argv,
const struct option *options,
const char * const usagestr[], int flags);
extern int parse_options_subcommand(int argc, const char **argv,
const struct option *options,
const char *const subcommands[],
const char *usagestr[], int flags);
extern NORETURN void usage_with_options(const char * const *usagestr,
const struct option *options);
@ -148,7 +153,8 @@ extern NORETURN void usage_with_options(const char * const *usagestr,
enum {
PARSE_OPT_HELP = -1,
PARSE_OPT_DONE,
PARSE_OPT_LIST,
PARSE_OPT_LIST_OPTS,
PARSE_OPT_LIST_SUBCMDS,
PARSE_OPT_UNKNOWN,
};