pybootchartgui: add the original code

This is from:
http://pybootchartgui.googlecode.com/files/pybootchartgui-r124.tar.gz

Will modify it to make the build profiling in pictures.

Remove the examples since they would not work any more, and they cost
much disk space.

[YOCTO #2403]

(From OE-Core rev: 1f0791109e1aed715f02945834d6d7fdb9a411b4)

Signed-off-by: Robert Yang <liezhi.yang@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

scripts/pybootchartgui/pybootchartgui/main.py

@@ -0,0 +1,71 @@
+import sys
+import os
+import optparse
+
+import parsing
+import gui
+import batch
+
+def _mk_options_parser():
+	"""Make an options parser."""
+	usage = "%prog [options] PATH, ..., PATH"
+	version = "%prog v0.0.0"
+	parser = optparse.OptionParser(usage, version=version)
+	parser.add_option("-i", "--interactive", action="store_true", dest="interactive", default=False, 
+			  help="start in active mode")
+	parser.add_option("-f", "--format", dest="format", default = None,
+			  help="image format (...); default format ...")
+	parser.add_option("-o", "--output", dest="output", metavar="PATH", default=None,
+			  help="output path (file or directory) where charts are stored")
+	parser.add_option("-n", "--no-prune", action="store_false", dest="prune", default=True,
+			  help="do not prune the process tree")
+	parser.add_option("-q", "--quiet", action="store_true", dest="quiet", default=False,
+			  help="suppress informational messages")
+	parser.add_option("--very-quiet", action="store_true", dest="veryquiet", default=False,
+			  help="suppress all messages except errors")
+	parser.add_option("--verbose", action="store_true", dest="verbose", default=False,
+			  help="print all messages")
+	return parser
+
+def _get_filename(paths, options):
+	"""Construct a usable filename for outputs based on the paths and options given on the commandline."""
+	dir = ""
+	file = "bootchart"
+	if options.output != None and not(os.path.isdir(options.output)):
+		return options.output
+	if options.output != None:
+		dir = options.output
+	if len(paths) == 1:
+		if os.path.isdir(paths[0]):
+			file = os.path.split(paths[0])[-1]
+		elif os.path.splitext(paths[0])[1] in [".tar", ".tgz", ".tar.gz"]:
+			file = os.path.splitext(paths[0])[0]
+	return os.path.join(dir, file + "." + options.format)
+
+def main(argv=None):
+	try:
+		if argv is None:
+			argv = sys.argv[1:]
+	
+		parser = _mk_options_parser()
+		options, args = parser.parse_args(argv)
+	
+		if len(args) == 0:
+			parser.error("insufficient arguments, expected at least one path.")
+			return 2
+
+		res = parsing.parse(args, options.prune)
+		if options.interactive or options.format == None:
+			gui.show(res)
+		else:
+			filename = _get_filename(args, options)
+			batch.render(res, options.format, filename)
+			print "bootchart written to", filename
+		return 0
+	except parsing.ParseError, ex:
+		print("Parse error: %s" % ex)
+		return 2
+
+
+if __name__ == '__main__':
+	sys.exit(main())