[tip:perf/core] perf report: Introduce --stdio-color to setup the color output mode selection

[tip-bot for Arnaldo Carvalho de Melo]

Commit-ID:  175b968b81ba3bef0b39618714eb23d6675a935c
Gitweb:     http://git.kernel.org/tip/175b968b81ba3bef0b39618714eb23d6675a935c
Author:     Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
AuthorDate: Tue, 5 Jul 2016 11:14:38 -0300
Committer:  Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
CommitDate: Tue, 12 Jul 2016 00:00:39 -0300

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

'perf report --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

Cc: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Cc: David Ahern <dsahern@xxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Wang Nan <wangnan0@xxxxxxxxxx>
Link: http://lkml.kernel.org/n/tip-3iuawqjldu4i8gziot7e3d5n@xxxxxxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
 tools/perf/Documentation/perf-report.txt | 7 +++++++
 tools/perf/builtin-report.c              | 3 +++
 2 files changed, 10 insertions(+)

diff --git a/tools/perf/Documentation/perf-report.txt b/tools/perf/Documentation/perf-report.txt
index 9cbddc2..2d17462 100644
--- a/tools/perf/Documentation/perf-report.txt
+++ b/tools/perf/Documentation/perf-report.txt
@@ -265,6 +265,13 @@ 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, that is integrated with annotate and allows
         zooming into DSOs or threads, among other features. Use of --tui
 	requires a tty, if one is not present, as when piping to other
diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index f6cb35798..949e5a1 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -817,6 +817,9 @@ int cmd_report(int argc, const char **argv, const char *prefix __maybe_unused)
 		    "Show raw trace event output (do not use print fmt or plugins)"),
 	OPT_BOOLEAN(0, "hierarchy", &symbol_conf.report_hierarchy,
 		    "Show entries in a hierarchy"),
+	OPT_CALLBACK_DEFAULT(0, "stdio-color", NULL, "mode",
+			     "'always' (default), 'never' or 'auto' only applicable to --stdio mode",
+			     stdio__config_color, "always"),
 	OPT_END()
 	};
 	struct perf_data_file file = {