Commit 09a71b97 authored by Ramkumar Ramachandra's avatar Ramkumar Ramachandra Committed by Arnaldo Carvalho de Melo

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

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: default avatarRamkumar Ramachandra <artagnon@gmail.com>
Acked-by: default avatarDavid Ahern <dsahern@gmail.com>
Acked-by: default avatarJiri Olsa <jolsa@redhat.com>
Cc: David Ahern <dsahern@gmail.com>
Link: http://lkml.kernel.org/r/1393896396-10427-1-git-send-email-artagnon@gmail.comSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 94a0793d
...@@ -1691,17 +1691,15 @@ int cmd_kvm(int argc, const char **argv, const char *prefix __maybe_unused) ...@@ -1691,17 +1691,15 @@ int cmd_kvm(int argc, const char **argv, const char *prefix __maybe_unused)
OPT_END() OPT_END()
}; };
const char *const kvm_subcommands[] = { "top", "record", "report", "diff",
const char * const kvm_usage[] = { "buildid-list", "stat", NULL };
"perf kvm [<options>] {top|record|report|diff|buildid-list|stat}", const char *kvm_usage[] = { NULL, NULL };
NULL
};
perf_host = 0; perf_host = 0;
perf_guest = 1; perf_guest = 1;
argc = parse_options(argc, argv, kvm_options, kvm_usage, argc = parse_options_subcommand(argc, argv, kvm_options, kvm_subcommands, kvm_usage,
PARSE_OPT_STOP_AT_NON_OPTION); PARSE_OPT_STOP_AT_NON_OPTION);
if (!argc) if (!argc)
usage_with_options(kvm_usage, kvm_options); usage_with_options(kvm_usage, kvm_options);
......
...@@ -123,7 +123,7 @@ __perf_main () ...@@ -123,7 +123,7 @@ __perf_main ()
__perfcomp_colon "$evts" "$cur" __perfcomp_colon "$evts" "$cur"
# List subcommands for 'perf kvm' # List subcommands for 'perf kvm'
elif [[ $prev == "kvm" ]]; then elif [[ $prev == "kvm" ]]; then
subcmds="top record report diff buildid-list stat" subcmds=$($cmd $prev --list-cmds)
__perfcomp_colon "$subcmds" "$cur" __perfcomp_colon "$subcmds" "$cur"
# List long option names # List long option names
elif [[ $cur == --* ]]; then elif [[ $cur == --* ]]; then
......
...@@ -407,7 +407,9 @@ int parse_options_step(struct parse_opt_ctx_t *ctx, ...@@ -407,7 +407,9 @@ int parse_options_step(struct parse_opt_ctx_t *ctx,
if (internal_help && !strcmp(arg + 2, "help")) if (internal_help && !strcmp(arg + 2, "help"))
return usage_with_options_internal(usagestr, options, 0); return usage_with_options_internal(usagestr, options, 0);
if (!strcmp(arg + 2, "list-opts")) 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)) { switch (parse_long_opt(ctx, arg + 2, options)) {
case -1: case -1:
return parse_options_usage(usagestr, options, arg + 2, 0); return parse_options_usage(usagestr, options, arg + 2, 0);
...@@ -433,25 +435,45 @@ int parse_options_end(struct parse_opt_ctx_t *ctx) ...@@ -433,25 +435,45 @@ int parse_options_end(struct parse_opt_ctx_t *ctx)
return ctx->cpidx + ctx->argc; return ctx->cpidx + ctx->argc;
} }
int parse_options(int argc, const char **argv, const struct option *options, int parse_options_subcommand(int argc, const char **argv, const struct option *options,
const char * const usagestr[], int flags) const char *const subcommands[], const char *usagestr[], int flags)
{ {
struct parse_opt_ctx_t ctx; struct parse_opt_ctx_t ctx;
perf_header__set_cmdline(argc, argv); 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); parse_options_start(&ctx, argc, argv, flags);
switch (parse_options_step(&ctx, options, usagestr)) { switch (parse_options_step(&ctx, options, usagestr)) {
case PARSE_OPT_HELP: case PARSE_OPT_HELP:
exit(129); exit(129);
case PARSE_OPT_DONE: case PARSE_OPT_DONE:
break; break;
case PARSE_OPT_LIST: case PARSE_OPT_LIST_OPTS:
while (options->type != OPTION_END) { while (options->type != OPTION_END) {
printf("--%s ", options->long_name); printf("--%s ", options->long_name);
options++; options++;
} }
exit(130); exit(130);
case PARSE_OPT_LIST_SUBCMDS:
for (int i = 0; subcommands[i]; i++)
printf("%s ", subcommands[i]);
exit(130);
default: /* PARSE_OPT_UNKNOWN */ default: /* PARSE_OPT_UNKNOWN */
if (ctx.argv[0][1] == '-') { if (ctx.argv[0][1] == '-') {
error("unknown option `%s'", ctx.argv[0] + 2); error("unknown option `%s'", ctx.argv[0] + 2);
...@@ -464,6 +486,13 @@ int parse_options(int argc, const char **argv, const struct option *options, ...@@ -464,6 +486,13 @@ int parse_options(int argc, const char **argv, const struct option *options,
return parse_options_end(&ctx); 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_OPTS_WIDTH 24
#define USAGE_GAP 2 #define USAGE_GAP 2
......
...@@ -140,6 +140,11 @@ extern int parse_options(int argc, const char **argv, ...@@ -140,6 +140,11 @@ extern int parse_options(int argc, const char **argv,
const struct option *options, const struct option *options,
const char * const usagestr[], int flags); 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, extern NORETURN void usage_with_options(const char * const *usagestr,
const struct option *options); const struct option *options);
...@@ -148,7 +153,8 @@ extern NORETURN void usage_with_options(const char * const *usagestr, ...@@ -148,7 +153,8 @@ extern NORETURN void usage_with_options(const char * const *usagestr,
enum { enum {
PARSE_OPT_HELP = -1, PARSE_OPT_HELP = -1,
PARSE_OPT_DONE, PARSE_OPT_DONE,
PARSE_OPT_LIST, PARSE_OPT_LIST_OPTS,
PARSE_OPT_LIST_SUBCMDS,
PARSE_OPT_UNKNOWN, PARSE_OPT_UNKNOWN,
}; };
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment