perf annotate: Introduce --stdio-color to setup the color output mode selection

'perf annotate --stdio' will colorize entries with most hits and
possibly some other aspects of its output, but those colors gets
suppressed if we redirect the output to a non-tty, allow keeping the
colors by adding a new option, --stdio-color, now this use case will
also output escape sequences for colors:

  $ perf annotate --stdio-color | more

Based-on-a-patch-by: Peter Zijlstra <peterz@infradead.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/n/tip-sjrnixani5pg6qez640gaxhf@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/Documentation/perf-annotate.txt b/tools/perf/Documentation/perf-annotate.txt
index 778f54d..8ffbd27 100644 (file)
--- a/tools/perf/Documentation/perf-annotate.txt
+++ b/tools/perf/Documentation/perf-annotate.txt
@@ -61,6 +61,13 @@ OPTIONS
 
 --stdio:: Use the stdio interface.
 
+--stdio-color::
+       'always', 'never' or 'auto', allowing configuring color output
+       via the command line, in addition to via "color.ui" .perfconfig.
+       Use '--stdio-color always' to generate color even when redirecting
+       to a pipe or file. Using just '--stdio-color' is equivalent to
+       using 'always'.
+
 --tui:: Use the TUI interface. Use of --tui requires a tty, if one is not
        present, as when piping to other commands, the stdio interface is
        used. This interfaces starts by centering on the line with more

diff --git a/tools/perf/builtin-annotate.c b/tools/perf/builtin-annotate.c
index b15e768..9c1034d 100644 (file)
--- a/tools/perf/builtin-annotate.c
+++ b/tools/perf/builtin-annotate.c
@@ -339,6 +339,9 @@ int cmd_annotate(int argc, const char **argv, const char *prefix __maybe_unused)
                    "Show event group information together"),
        OPT_BOOLEAN(0, "show-total-period", &symbol_conf.show_total_period,
                    "Show a column with the sum of periods"),
+       OPT_CALLBACK_DEFAULT(0, "stdio-color", NULL, "mode",
+                            "'always' (default), 'never' or 'auto' only applicable to --stdio mode",
+                            stdio__config_color, "always"),
        OPT_END()
        };
        int ret = hists__init();