Squashed 'waflib/' content from commit 9eb0cf8

git-subtree-dir: waflib
git-subtree-split: 9eb0cf856c394d9354a15c606107ca294db406bb

1 files changed, 325 insertions, 0 deletions

diff --git a/extras/review.py b/extras/review.py
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+#!/usr/bin/env python
+# encoding: utf-8
+# Laurent Birtz, 2011
+# moved the code into a separate tool (ita)
+
+"""
+There are several things here:
+- a different command-line option management making options persistent
+- the review command to display the options set
+
+Assumptions:
+- configuration options are not always added to the right group (and do not count on the users to do it...)
+- the options are persistent between the executions (waf options are NOT persistent by design), even for the configuration
+- when the options change, the build is invalidated (forcing a reconfiguration)
+"""
+
+import os, textwrap, shutil
+from waflib import Logs, Context, ConfigSet, Options, Build, Configure
+
+class Odict(dict):
+	"""Ordered dictionary"""
+	def __init__(self, data=None):
+		self._keys = []
+		dict.__init__(self)
+		if data:
+			# we were provided a regular dict
+			if isinstance(data, dict):
+				self.append_from_dict(data)
+
+			# we were provided a tuple list
+			elif type(data) == list:
+				self.append_from_plist(data)
+
+			# we were provided invalid input
+			else:
+				raise Exception("expected a dict or a tuple list")
+
+	def append_from_dict(self, dict):
+		map(self.__setitem__, dict.keys(), dict.values())
+
+	def append_from_plist(self, plist):
+		for pair in plist:
+			if len(pair) != 2:
+				raise Exception("invalid pairs list")
+		for (k, v) in plist:
+			self.__setitem__(k, v)
+
+	def __delitem__(self, key):
+		if not key in self._keys:
+			raise KeyError(key)
+		dict.__delitem__(self, key)
+		self._keys.remove(key)
+
+	def __setitem__(self, key, item):
+		dict.__setitem__(self, key, item)
+		if key not in self._keys:
+			self._keys.append(key)
+
+	def clear(self):
+		dict.clear(self)
+		self._keys = []
+
+	def copy(self):
+		return Odict(self.plist())
+
+	def items(self):
+		return zip(self._keys, self.values())
+
+	def keys(self):
+		return list(self._keys) # return a copy of the list
+
+	def values(self):
+		return map(self.get, self._keys)
+
+	def plist(self):
+		p = []
+		for k, v in self.items():
+			p.append( (k, v) )
+		return p
+
+	def __str__(self):
+		buf = []
+		buf.append("{ ")
+		for k, v in self.items():
+			buf.append('%r : %r, ' % (k, v))
+		buf.append("}")
+		return ''.join(buf)
+
+review_options = Odict()
+"""
+Ordered dictionary mapping configuration option names to their optparse option.
+"""
+
+review_defaults = {}
+"""
+Dictionary mapping configuration option names to their default value.
+"""
+
+old_review_set = None
+"""
+Review set containing the configuration values before parsing the command line.
+"""
+
+new_review_set = None
+"""
+Review set containing the configuration values after parsing the command line.
+"""
+
+class OptionsReview(Options.OptionsContext):
+	def __init__(self, **kw):
+		super(self.__class__, self).__init__(**kw)
+
+	def prepare_config_review(self):
+		"""
+		Find the configuration options that are reviewable, detach
+		their default value from their optparse object and store them
+		into the review dictionaries.
+		"""
+		gr = self.get_option_group('configure options')
+		for opt in gr.option_list:
+			if opt.action != 'store' or opt.dest in ("out", "top"):
+				continue
+			review_options[opt.dest] = opt
+			review_defaults[opt.dest] = opt.default
+			if gr.defaults.has_key(opt.dest):
+				del gr.defaults[opt.dest]
+			opt.default = None
+
+	def parse_args(self):
+		self.prepare_config_review()
+		self.parser.get_option('--prefix').help = 'installation prefix'
+		super(OptionsReview, self).parse_args()
+		Context.create_context('review').refresh_review_set()
+
+class ReviewContext(Context.Context):
+	'''reviews the configuration values'''
+
+	cmd = 'review'
+
+	def __init__(self, **kw):
+		super(self.__class__, self).__init__(**kw)
+
+		out = Options.options.out
+		if not out:
+			out = getattr(Context.g_module, Context.OUT, None)
+		if not out:
+			out = Options.lockfile.replace('.lock-waf', '')
+		self.build_path = (os.path.isabs(out) and self.root or self.path).make_node(out).abspath()
+		"""Path to the build directory"""
+
+		self.cache_path = os.path.join(self.build_path, Build.CACHE_DIR)
+		"""Path to the cache directory"""
+
+		self.review_path = os.path.join(self.cache_path, 'review.cache')
+		"""Path to the review cache file"""
+
+	def execute(self):
+		"""
+		Display and store the review set. Invalidate the cache as required.
+		"""
+		if not self.compare_review_set(old_review_set, new_review_set):
+			self.invalidate_cache()
+		self.store_review_set(new_review_set)
+		print(self.display_review_set(new_review_set))
+
+	def invalidate_cache(self):
+		"""Invalidate the cache to prevent bad builds."""
+		try:
+			Logs.warn("Removing the cached configuration since the options have changed")
+			shutil.rmtree(self.cache_path)
+		except:
+			pass
+
+	def refresh_review_set(self):
+		"""
+		Obtain the old review set and the new review set, and import the new set.
+		"""
+		global old_review_set, new_review_set
+		old_review_set = self.load_review_set()
+		new_review_set = self.update_review_set(old_review_set)
+		self.import_review_set(new_review_set)
+
+	def load_review_set(self):
+		"""
+		Load and return the review set from the cache if it exists.
+		Otherwise, return an empty set.
+		"""
+		if os.path.isfile(self.review_path):
+			return ConfigSet.ConfigSet(self.review_path)
+		return ConfigSet.ConfigSet()
+
+	def store_review_set(self, review_set):
+		"""
+		Store the review set specified in the cache.
+		"""
+		if not os.path.isdir(self.cache_path):
+			os.makedirs(self.cache_path)
+		review_set.store(self.review_path)
+
+	def update_review_set(self, old_set):
+		"""
+		Merge the options passed on the command line with those imported
+		from the previous review set and return the corresponding
+		preview set.
+		"""
+
+		# Convert value to string. It's important that 'None' maps to
+		# the empty string.
+		def val_to_str(val):
+			if val == None or val == '':
+				return ''
+			return str(val)
+
+		new_set = ConfigSet.ConfigSet()
+		opt_dict = Options.options.__dict__
+
+		for name in review_options.keys():
+			# the option is specified explicitly on the command line
+			if name in opt_dict:
+				# if the option is the default, pretend it was never specified
+				if val_to_str(opt_dict[name]) != val_to_str(review_defaults[name]):
+					new_set[name] = opt_dict[name]
+			# the option was explicitly specified in a previous command
+			elif name in old_set:
+				new_set[name] = old_set[name]
+
+		return new_set
+
+	def import_review_set(self, review_set):
+		"""
+		Import the actual value of the reviewable options in the option
+		dictionary, given the current review set.
+		"""
+		for name in review_options.keys():
+			if name in review_set:
+				value = review_set[name]
+			else:
+				value = review_defaults[name]
+			setattr(Options.options, name, value)
+
+	def compare_review_set(self, set1, set2):
+		"""
+		Return true if the review sets specified are equal.
+		"""
+		if len(set1.keys()) != len(set2.keys()):
+			return False
+		for key in set1.keys():
+			if not key in set2 or set1[key] != set2[key]:
+				return False
+		return True
+
+	def display_review_set(self, review_set):
+		"""
+		Return the string representing the review set specified.
+		"""
+		term_width = Logs.get_term_cols()
+		lines = []
+		for dest in review_options.keys():
+			opt = review_options[dest]
+			name = ", ".join(opt._short_opts + opt._long_opts)
+			help = opt.help
+			actual = None
+			if dest in review_set:
+				actual = review_set[dest]
+			default = review_defaults[dest]
+			lines.append(self.format_option(name, help, actual, default, term_width))
+		return "Configuration:\n\n" + "\n\n".join(lines) + "\n"
+
+	def format_option(self, name, help, actual, default, term_width):
+		"""
+		Return the string representing the option specified.
+		"""
+		def val_to_str(val):
+			if val == None or val == '':
+				return "(void)"
+			return str(val)
+
+		max_name_len = 20
+		sep_len = 2
+
+		w = textwrap.TextWrapper()
+		w.width = term_width - 1
+		if w.width < 60:
+			w.width = 60
+
+		out = ""
+
+		# format the help
+		out += w.fill(help) + "\n"
+
+		# format the name
+		name_len = len(name)
+		out += Logs.colors.CYAN + name + Logs.colors.NORMAL
+
+		# set the indentation used when the value wraps to the next line
+		w.subsequent_indent = " ".rjust(max_name_len + sep_len)
+		w.width -= (max_name_len + sep_len)
+
+		# the name string is too long, switch to the next line
+		if name_len > max_name_len:
+			out += "\n" + w.subsequent_indent
+
+		# fill the remaining of the line with spaces
+		else:
+			out += " ".rjust(max_name_len + sep_len - name_len)
+
+		# format the actual value, if there is one
+		if actual != None:
+			out += Logs.colors.BOLD + w.fill(val_to_str(actual)) + Logs.colors.NORMAL + "\n" + w.subsequent_indent
+
+		# format the default value
+		default_fmt = val_to_str(default)
+		if actual != None:
+			default_fmt = "default: " + default_fmt
+		out += Logs.colors.NORMAL + w.fill(default_fmt) + Logs.colors.NORMAL
+
+		return out
+
+# Monkey-patch ConfigurationContext.execute() to have it store the review set.
+old_configure_execute = Configure.ConfigurationContext.execute
+def new_configure_execute(self):
+	old_configure_execute(self)
+	Context.create_context('review').store_review_set(new_review_set)
+Configure.ConfigurationContext.execute = new_configure_execute
+