[PATCH v4 0/5] perf tools: Add 'perf-config' command

[Taeung Song <treeze.taeung@gmail.com>]

Changes in v4:
	- If some config value is default value, notice it is '(default)'as below.

	  # perf config colors.normal
	  colors.normal=lightgray, default (default)

	- A config file path is only decided in perf_config().
	And a perf-config command depend on perf_config() deciding a config file path.
	So if the config file path is NULL because of some reason like no such file,
	a perf-config command can't write to the file. So, I added new options
	which are '--global' and '--system' to be enable to select
	config file path to be used without perf_config().

Changes in v3:
	- Add a config variable 'kmem.default' with a default value
	into 'struct default_configset' which has default config variables and values.

	- Add a option '--global' and '--local' to enable config file location to  be selected

Changes in v2:
	- Renaming variables a more suitable name
	  1. '--list-all' instead of '--all'
	  2. 'name' instead of 'subkey'
	  3. 'section, name, value' instead of 'given_section, subkey, value'

	- Correct small infelicities or typing errors in a perf-config documention.

	- Remove a part description of report.children
	because it was duplicated in Documentation/callchain-overhead-calculation.txt

	- Use a variable 'int actions' instead of struct params which has
	'bool list_action' , 'bool get_action’ and etc. , to simplify a branching statement
	for perf-config options.

	- Declaration a global variable 'static struct default_configsets' has config variables
	with default values instead of using a 'util/PERFCONFIG-DEFAULT' file
	and remove functions merge() and perse_key() to get perf config default values.

	- Add a function to normalize a value and check data type of it.

	- Simplify parsing arguments as arguments is just divided by '=' and then
	in front of '.' is a section, between '.' and '=' is a name, and behind '=' is a value.

	- Print config variables 'struct default_configsets' haven't 

	- Make a command ’perf config' without a option work as with a option '—list'
	instead of '--list-all’.

Taeung Song (5):
  perf tools: Add 'perf-config' command
  perf config: Add '--system' and '--global' options to be able to
    select which config file to be used
  perf config: Add functions which can get or set perf config variables
  perf config: Add a option 'list-all' to perf-config
  perf config: Add a option 'remove' to perf-config

 tools/perf/Build                            |   1 +
 tools/perf/Documentation/perf-config.txt    | 407 ++++++++++++++++
 tools/perf/Documentation/perfconfig.example |  73 ++-
 tools/perf/builtin-config.c                 | 718 ++++++++++++++++++++++++++++
 tools/perf/builtin.h                        |   1 +
 tools/perf/command-list.txt                 |   1 +
 tools/perf/perf.c                           |   1 +
 tools/perf/util/cache.h                     |  19 +
 tools/perf/util/config.c                    |  29 +-
 9 files changed, 1236 insertions(+), 14 deletions(-)
 create mode 100644 tools/perf/Documentation/perf-config.txt
 create mode 100644 tools/perf/builtin-config.c

-- 
1.9.1