Moved Sublime documentation to markdown and added SublimeClang setup

tools/sublime/ninja_options_script.py

Index: tools/sublime/ninja_options_script.py
diff --git a/tools/sublime/ninja_options_script.py b/tools/sublime/ninja_options_script.py
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+#!/usr/bin/python
+# Copyright 2016 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+#
+# Usage within SublimeClang:
+#   "sublimeclang_options_script": "python
+#       ${project_path}/src/tools/sublime/ninja_options_script.py \
+#       ${project_path}/src \
+#       ${project_path}/src/out/Debug"
+#
+# NOTE: ${project_path} expands to the directory of the Sublime project file,
+# and SublimgClang passes the absolute file path to the current file as an
+# additional argument.
+
+import fnmatch
+import logging
+import os
+import sys
+
+# Change to an absolute reference if ninja is not on your path
+path_to_ninja = 'ninja'
+
+# Ninja file options to extract (add 'cflags' if you need the c flags too,
+# although these usually break things)
+ninja_file_options = ['defines', 'include_dirs', 'cflags_cc']
+
+def merge_options_dicts(options_dict_1, options_dict_2):
+  '''
+  Given two dictionaries of options, returns one dictionary with both sets of
+  options appended together.
+
+  Both dictionaries must have the same options, even if some of them are empty
+  lists.
+  '''
+  assert set(options_dict_1.keys()) == set(options_dict_2.keys()), \
+      "Both options dicts must have the same keys"
+  final_options_dict = {}
+  for key in options_dict_1:
+    final_options_dict[key] = options_dict_1[key] + options_dict_2[key]
+  return final_options_dict
+
+def extract_options_from_ninja_file(ninja_file_path, options_to_extract):
+  '''
+  Extracts the given options from the file at ninja_file_path and returns them
+  as a dictionary.
+  '''
+  extracted_options = dict((o, []) for o in options_to_extract)
+  for line in open(ninja_file_path):
+    for option in options_to_extract:
+      if line.strip().startswith(option):
+        extracted_options[option] += line.split('=', 1)[1].split()
+  return extracted_options
+
+def find_ninja_file_options(ninja_root_path, relative_file_path_to_find,
+                            options_to_extract):
+  '''
+  Returns a dictionary of the given extracted options for the ninja file for
+  relative_file_path_to_find.
+
+  The options are extracted from the first *.ninja file in ninja_root_path that
+  contains relative_file_path_to_find. Otherwise, the first *.ninja file that
+  contains relative_file_path_to_find without the file extension. Otherwise, the
+  script walks up directories until it finds ninja files and then concatenates
+  the found options from all of them.
+  '''
+  matches = []
+  for root, dirnames, filenames in os.walk(ninja_root_path):
+    for filename in fnmatch.filter(filenames, '*.ninja'):
+      matches.append(os.path.join(root, filename))
+  logging.debug("Found %d Ninja targets", len(matches))
+
+  # First, look for a *.ninja file containing the full filename.
+  for ninja_file in matches:
+    for line in open(ninja_file):
+      if relative_file_path_to_find in line:
+        return extract_options_from_ninja_file(ninja_file, options_to_extract)
+
+  # Next, look for a *.ninja file containing the basename (no extension).
+  # This is a fix for header files with a corresponding cpp file.
+  for ninja_file in matches:
+    for line in open(ninja_file):
+      if os.path.splitext(relative_file_path_to_find)[0] in line:
+        all_options = extract_options_from_ninja_file(ninja_file,
+                                                      options_to_extract)
+        if all_options['include_dirs']:
+          return all_options
+
+  # Finally, open any *.ninja files in the directory or higher.
+  current_path = os.path.join(ninja_root_path, 'obj',
+                              os.path.dirname(relative_file_path_to_find))
+  while current_path != ninja_root_path:
+    if os.path.exists(current_path):
+      matches = []
+      for root, dirnames, filenames in os.walk(ninja_root_path):
+        for filename in fnmatch.filter(filenames, '*.ninja'):
+          matches.append(os.path.join(root, filename))
+      logging.debug("Found %d Ninja targets", len(matches))
+
+      matches = []
+      for match in os.listdir(current_path):
+        if match.endswith('.ninja'):
+          matches.append(os.path.join(current_path, match))
+      all_options = dict((o, []) for o in options_to_extract)
+      for ninja_file in matches:
+        all_options = merge_options_dicts(all_options,
+            extract_options_from_ninja_file(ninja_file, options_to_extract))
+      # As soon as we have some include_dirs from the ninja files, return.
+      if all_options['include_dirs']:
+        return all_options
+    current_path = os.path.dirname(current_path)
+
+  return None
+
+project_path = sys.argv[1]
+build_path = sys.argv[2]
+file_path = sys.argv[3]
+
+logging.debug("Compiling file %s\n", file_path)
+# The file must be somewhere under the project folder...
+if not file_path.lower().startswith(project_path.lower()):
+  logging.error("File %s is not in current project folder %s\n",
+                file_path, project_path)
+  sys.exit(1)
+file_relative_path = os.path.relpath(file_path, project_path)
+
+# Look for a .ninja file that contains our current file, since the ninja
+# project file name is needed to construct the full Ninja target path.
+logging.debug("Searching for Ninja target")
+options = find_ninja_file_options(build_path, file_relative_path,
+                                  ninja_file_options)
+if not options:
+  logging.error("File %s is not in any Ninja file under %s",
+                file_relative_path, build_path)
+  sys.exit(2)
+
+for option in ninja_file_options:
+  for piece in options[option]:
+    # Resolve relative includes
+    if piece.startswith('-I'):
+      print('-I' + os.path.join(build_path, piece[2:]))
+    else:
+      print(piece)