perf tools: Long option completion support for each subcommands

Add internal --list-opts option to print all of long option names to
stdout so that it can be used for bash completion engine.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Acked-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1349191294-6926-4-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/bash_completion b/tools/perf/bash_completion
index bef06f0..5c355ab 100644 (file)
--- a/tools/perf/bash_completion
+++ b/tools/perf/bash_completion
@@ -33,8 +33,13 @@ _perf()
                fi
        # List possible events for -e option
        elif [[ $prev == "-e" && "${COMP_WORDS[1]}" == @(record|stat|top) ]]; then
-               cmds=$($cmd list --raw-dump)
-               COMPREPLY=( $( compgen -W '$cmds' -- "$cur" ) )
+               evts=$($cmd list --raw-dump)
+               COMPREPLY=( $( compgen -W '$evts' -- "$cur" ) )
+       # List long option names
+       elif [[ $cur == --* ]];  then
+               subcmd=${COMP_WORDS[1]}
+               opts=$($cmd $subcmd --list-opts)
+               COMPREPLY=( $( compgen -W '$opts' -- "$cur" ) )
        # Fall down to list regular files
        else
                _filedir

diff --git a/tools/perf/util/parse-options.c b/tools/perf/util/parse-options.c
index 443fc11..2bc9e70 100644 (file)
--- a/tools/perf/util/parse-options.c
+++ b/tools/perf/util/parse-options.c
@@ -384,6 +384,8 @@ int parse_options_step(struct parse_opt_ctx_t *ctx,
                        return usage_with_options_internal(usagestr, options, 1);
                if (internal_help && !strcmp(arg + 2, "help"))
                        return parse_options_usage(usagestr, options);
+               if (!strcmp(arg + 2, "list-opts"))
+                       return PARSE_OPT_LIST;
                switch (parse_long_opt(ctx, arg + 2, options)) {
                case -1:
                        return parse_options_usage(usagestr, options);
@@ -422,6 +424,12 @@ int parse_options(int argc, const char **argv, const struct option *options,
                exit(129);
        case PARSE_OPT_DONE:
                break;
+       case PARSE_OPT_LIST:
+               while (options->type != OPTION_END) {
+                       printf("--%s ", options->long_name);
+                       options++;
+               }
+               exit(130);
        default: /* PARSE_OPT_UNKNOWN */
                if (ctx.argv[0][1] == '-') {
                        error("unknown option `%s'", ctx.argv[0] + 2);

diff --git a/tools/perf/util/parse-options.h b/tools/perf/util/parse-options.h
index abc31a1..7bb5999 100644 (file)
--- a/tools/perf/util/parse-options.h
+++ b/tools/perf/util/parse-options.h
@@ -140,6 +140,7 @@ extern NORETURN void usage_with_options(const char * const *usagestr,
 enum {
        PARSE_OPT_HELP = -1,
        PARSE_OPT_DONE,
+       PARSE_OPT_LIST,
        PARSE_OPT_UNKNOWN,
 };