perf tools: Initial bash completion support

This implements bash completion for perf subcommands such as record,
report, script, probe, etc...

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1344522713-27951-2-git-send-email-fweisbec@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

3 files changed, 62 insertions, 30 deletions

diff --git a/tools/perf/Makefile b/tools/perf/Makefile
index 2d4bf6ef1c5a..84b422786949 100644
--- a/tools/perf/Makefile
+++ b/tools/perf/Makefile
@@ -951,6 +951,7 @@ install: all
         $(INSTALL) scripts/python/Perf-Trace-Util/lib/Perf/Trace/* -t '$(DESTDIR_SQ)$(perfexec_instdir_SQ)/scripts/python/Perf-Trace-Util/lib/Perf/Trace'
         $(INSTALL) scripts/python/*.py -t '$(DESTDIR_SQ)$(perfexec_instdir_SQ)/scripts/python'
         $(INSTALL) scripts/python/bin/* -t '$(DESTDIR_SQ)$(perfexec_instdir_SQ)/scripts/python/bin'
+        $(INSTALL) -m 755 bash_completion $(DESTDIR_SQ)/etc/bash_completion.d/perf
 
 install-python_ext:
         $(PYTHON_WORD) util/setup.py --quiet install --root='/$(DESTDIR_SQ)'
diff --git a/tools/perf/bash_completion b/tools/perf/bash_completion
new file mode 100644
index 000000000000..9a31fa5ed2a9
--- /dev/null
+++ b/tools/perf/bash_completion
@@ -0,0 +1,22 @@
+# perf completion
+
+have perf &&
+_perf()
+{
+        local cur cmd
+
+        COMPREPLY=()
+        _get_comp_words_by_ref cur
+
+        cmd=${COMP_WORDS[0]}
+
+        # List perf subcommands
+        if [ $COMP_CWORD -eq 1 ]; then
+                cmds=$($cmd --list-cmds)
+                COMPREPLY=( $( compgen -W '$cmds' -- "$cur" ) )
+        # Fall down to list regular files
+        else
+                _filedir
+        fi
+} &&
+complete -F _perf perf
diff --git a/tools/perf/perf.c b/tools/perf/perf.c
index 2b2e225a4d4c..db37ee3f29b8 100644
--- a/tools/perf/perf.c
+++ b/tools/perf/perf.c
@@ -24,6 +24,37 @@ const char perf_more_info_string[] =
 int use_browser = -1;
 static int use_pager = -1;
 
+struct cmd_struct {
+        const char *cmd;
+        int (*fn)(int, const char **, const char *);
+        int option;
+};
+
+static struct cmd_struct commands[] = {
+        { "buildid-cache", cmd_buildid_cache, 0 },
+        { "buildid-list", cmd_buildid_list, 0 },
+        { "diff",       cmd_diff,       0 },
+        { "evlist",     cmd_evlist,     0 },
+        { "help",       cmd_help,       0 },
+        { "list",       cmd_list,       0 },
+        { "record",     cmd_record,     0 },
+        { "report",     cmd_report,     0 },
+        { "bench",      cmd_bench,      0 },
+        { "stat",       cmd_stat,       0 },
+        { "timechart",  cmd_timechart,  0 },
+        { "top",        cmd_top,        0 },
+        { "annotate",   cmd_annotate,   0 },
+        { "version",    cmd_version,    0 },
+        { "script",     cmd_script,     0 },
+        { "sched",      cmd_sched,      0 },
+        { "probe",      cmd_probe,      0 },
+        { "kmem",       cmd_kmem,       0 },
+        { "lock",       cmd_lock,       0 },
+        { "kvm",        cmd_kvm,        0 },
+        { "test",       cmd_test,       0 },
+        { "inject",     cmd_inject,     0 },
+};
+
 struct pager_config {
         const char *cmd;
         int val;
@@ -160,6 +191,14 @@ static int handle_options(const char ***argv, int *argc, int *envchanged)
                         fprintf(stderr, "dir: %s\n", debugfs_mountpoint);
                         if (envchanged)
                                 *envchanged = 1;
+                } else if (!strcmp(cmd, "--list-cmds")) {
+                        unsigned int i;
+
+                        for (i = 0; i < ARRAY_SIZE(commands); i++) {
+                                struct cmd_struct *p = commands+i;
+                                printf("%s ", p->cmd);
+                        }
+                        exit(0);
                 } else {
                         fprintf(stderr, "Unknown option: %s\n", cmd);
                         usage(perf_usage_string);
@@ -245,12 +284,6 @@ const char perf_version_string[] = PERF_VERSION;
  */
 #define NEED_WORK_TREE  (1<<2)
 
-struct cmd_struct {
-        const char *cmd;
-        int (*fn)(int, const char **, const char *);
-        int option;
-};
-
 static int run_builtin(struct cmd_struct *p, int argc, const char **argv)
 {
         int status;
@@ -296,30 +329,6 @@ static int run_builtin(struct cmd_struct *p, int argc, const char **argv)
 static void handle_internal_command(int argc, const char **argv)
 {
         const char *cmd = argv[0];
-        static struct cmd_struct commands[] = {
-                { "buildid-cache", cmd_buildid_cache, 0 },
-                { "buildid-list", cmd_buildid_list, 0 },
-                { "diff",       cmd_diff,       0 },
-                { "evlist",     cmd_evlist,     0 },
-                { "help",       cmd_help,       0 },
-                { "list",       cmd_list,       0 },
-                { "record",     cmd_record,     0 },
-                { "report",     cmd_report,     0 },
-                { "bench",      cmd_bench,      0 },
-                { "stat",       cmd_stat,       0 },
-                { "timechart",  cmd_timechart,  0 },
-                { "top",        cmd_top,        0 },
-                { "annotate",   cmd_annotate,   0 },
-                { "version",    cmd_version,    0 },
-                { "script",     cmd_script,     0 },
-                { "sched",      cmd_sched,      0 },
-                { "probe",      cmd_probe,      0 },
-                { "kmem",       cmd_kmem,       0 },
-                { "lock",       cmd_lock,       0 },
-                { "kvm",        cmd_kvm,        0 },
-                { "test",       cmd_test,       0 },
-                { "inject",     cmd_inject,     0 },
-        };
         unsigned int i;
         static const char ext[] = STRIP_EXTENSION;