Mercurial > libervia-backend
annotate sat/bridge/bridge_constructor/base_constructor.py @ 2771:003b8b4b56a7
date update
| author | Goffi <goffi@goffi.org> |
|---|---|
| date | Sat, 12 Jan 2019 12:25:31 +0100 |
| parents | 779351da2c13 |
| children | ab2696e34d29 |
| rev | line source |
|---|---|
| 2085 | 1 #!/usr/bin/env python2 |
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2 # -*- coding: utf-8 -*- |
| 2085 | 3 |
| 4 # SàT: a XMPP client | |
| 2771 | 5 # Copyright (C) 2009-2019 Jérôme Poisson (goffi@goffi.org) |
| 2085 | 6 |
| 7 # This program is free software: you can redistribute it and/or modify | |
| 8 # it under the terms of the GNU Affero General Public License as published by | |
| 9 # the Free Software Foundation, either version 3 of the License, or | |
| 10 # (at your option) any later version. | |
| 11 | |
| 12 # This program is distributed in the hope that it will be useful, | |
| 13 # but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 15 # GNU Affero General Public License for more details. | |
| 16 | |
| 17 # You should have received a copy of the GNU Affero General Public License | |
| 18 # along with this program. If not, see <http://www.gnu.org/licenses/>. | |
| 19 | |
| 20 """base constructor class""" | |
| 21 | |
| 22 from sat.bridge.bridge_constructor.constants import Const as C | |
| 23 from ConfigParser import NoOptionError | |
| 24 import sys | |
| 25 import os | |
| 26 import os.path | |
| 27 import re | |
| 28 from importlib import import_module | |
| 29 | |
| 30 | |
| 31 class ParseError(Exception): | |
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32 # Used when the signature parsing is going wrong (invalid signature ?) |
| 2085 | 33 pass |
| 34 | |
| 35 | |
| 36 class Constructor(object): | |
| 37 NAME = None # used in arguments parsing, filename will be used if not set | |
| 38 # following attribute are used by default generation method | |
| 39 # they can be set to dict of strings using python formatting syntax | |
| 40 # dict keys will be used to select part to replace (e.g. "signals" key will | |
| 41 # replace ##SIGNALS_PART## in template), while the value is the format | |
| 42 # keys starting with "signal" will be used for signals, while ones starting with | |
| 43 # "method" will be used for methods | |
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44 # check D-Bus constructor for an example |
| 2085 | 45 CORE_FORMATS = None |
| 46 CORE_TEMPLATE = None | |
| 47 CORE_DEST = None | |
| 48 FRONTEND_FORMATS = None | |
| 49 FRONTEND_TEMPLATE = None | |
| 50 FRONTEND_DEST = None | |
| 51 | |
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52 # set to False if your bridge need only core |
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53 FRONTEND_ACTIVATE = True |
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54 |
| 2085 | 55 def __init__(self, bridge_template, options): |
| 56 self.bridge_template = bridge_template | |
| 57 self.args = options | |
| 58 | |
| 59 @property | |
| 60 def constructor_dir(self): | |
| 61 constructor_mod = import_module(self.__module__) | |
| 62 return os.path.dirname(constructor_mod.__file__) | |
| 63 | |
| 64 def getValues(self, name): | |
| 65 """Return values of a function in a dict | |
| 66 @param name: Name of the function to get | |
| 67 @return: dict, each key has the config value or None if the value is not set""" | |
| 68 function = {} | |
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69 for option in ["type", "category", "sig_in", "sig_out", "doc"]: |
| 2085 | 70 try: |
| 71 value = self.bridge_template.get(name, option) | |
| 72 except NoOptionError: | |
| 73 value = None | |
| 74 function[option] = value | |
| 75 return function | |
| 76 | |
| 77 def getDefault(self, name): | |
| 78 """Return default values of a function in a dict | |
| 79 @param name: Name of the function to get | |
| 80 @return: dict, each key is the integer param number (no key if no default value)""" | |
| 81 default_dict = {} | |
| 82 def_re = re.compile(r"param_(\d+)_default") | |
| 83 | |
| 84 for option in self.bridge_template.options(name): | |
| 85 match = def_re.match(option) | |
| 86 if match: | |
| 87 try: | |
| 88 idx = int(match.group(1)) | |
| 89 except ValueError: | |
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90 raise ParseError( |
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91 "Invalid value [%s] for parameter number" % match.group(1) |
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92 ) |
| 2085 | 93 default_dict[idx] = self.bridge_template.get(name, option) |
| 94 | |
| 95 return default_dict | |
| 96 | |
| 97 def getFlags(self, name): | |
| 98 """Return list of flags set for this function | |
| 99 | |
| 100 @param name: Name of the function to get | |
| 101 @return: List of flags (string) | |
| 102 """ | |
| 103 flags = [] | |
| 104 for option in self.bridge_template.options(name): | |
| 105 if option in C.DECLARATION_FLAGS: | |
| 106 flags.append(option) | |
| 107 return flags | |
| 108 | |
| 109 def getArgumentsDoc(self, name): | |
| 110 """Return documentation of arguments | |
| 111 @param name: Name of the function to get | |
| 112 @return: dict, each key is the integer param number (no key if no argument doc), value is a tuple (name, doc)""" | |
| 113 doc_dict = {} | |
| 114 option_re = re.compile(r"doc_param_(\d+)") | |
| 115 value_re = re.compile(r"^(\w+): (.*)$", re.MULTILINE | re.DOTALL) | |
| 116 for option in self.bridge_template.options(name): | |
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117 if option == "doc_return": |
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118 doc_dict["return"] = self.bridge_template.get(name, option) |
| 2085 | 119 continue |
| 120 match = option_re.match(option) | |
| 121 if match: | |
| 122 try: | |
| 123 idx = int(match.group(1)) | |
| 124 except ValueError: | |
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125 raise ParseError( |
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126 "Invalid value [%s] for parameter number" % match.group(1) |
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127 ) |
| 2085 | 128 value_match = value_re.match(self.bridge_template.get(name, option)) |
| 129 if not value_match: | |
| 130 raise ParseError("Invalid value for parameter doc [%i]" % idx) | |
| 131 doc_dict[idx] = (value_match.group(1), value_match.group(2)) | |
| 132 return doc_dict | |
| 133 | |
| 134 def getDoc(self, name): | |
| 135 """Return documentation of the method | |
| 136 @param name: Name of the function to get | |
| 137 @return: string documentation, or None""" | |
| 138 if self.bridge_template.has_option(name, "doc"): | |
| 139 return self.bridge_template.get(name, "doc") | |
| 140 return None | |
| 141 | |
| 142 def argumentsParser(self, signature): | |
| 143 """Generator which return individual arguments signatures from a global signature""" | |
| 144 start = 0 | |
| 145 i = 0 | |
| 146 | |
| 147 while i < len(signature): | |
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148 if signature[i] not in ["b", "y", "n", "i", "x", "q", "u", "t", "d", "s", |
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149 "a"]: |
| 2085 | 150 raise ParseError("Unmanaged attribute type [%c]" % signature[i]) |
| 151 | |
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152 if signature[i] == "a": |
| 2085 | 153 i += 1 |
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154 if ( |
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155 signature[i] != "{" and signature[i] != "(" |
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156 ): # FIXME: must manage tuples out of arrays |
| 2085 | 157 i += 1 |
| 158 yield signature[start:i] | |
| 159 start = i | |
| 160 continue # we have a simple type for the array | |
| 161 opening_car = signature[i] | |
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162 assert opening_car in ["{", "("] |
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163 closing_car = "}" if opening_car == "{" else ")" |
| 2085 | 164 opening_count = 1 |
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165 while True: # we have a dict or a list of tuples |
| 2085 | 166 i += 1 |
| 167 if i >= len(signature): | |
| 168 raise ParseError("missing }") | |
| 169 if signature[i] == opening_car: | |
| 170 opening_count += 1 | |
| 171 if signature[i] == closing_car: | |
| 172 opening_count -= 1 | |
| 173 if opening_count == 0: | |
| 174 break | |
| 175 i += 1 | |
| 176 yield signature[start:i] | |
| 177 start = i | |
| 178 | |
| 179 def getArguments(self, signature, name=None, default=None, unicode_protect=False): | |
| 180 """Return arguments to user given a signature | |
| 181 | |
| 182 @param signature: signature in the short form (using s,a,i,b etc) | |
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183 @param name: dictionary of arguments name like given by getArgumentsDoc |
| 2085 | 184 @param default: dictionary of default values, like given by getDefault |
| 185 @param unicode_protect: activate unicode protection on strings (return strings as unicode(str)) | |
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186 @return (str): arguments that correspond to a signature (e.g.: "sss" return "arg1, arg2, arg3") |
| 2085 | 187 """ |
| 188 idx = 0 | |
| 189 attr_string = [] | |
| 190 | |
| 191 for arg in self.argumentsParser(signature): | |
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192 attr_string.append( |
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193 ( |
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194 "unicode(%(name)s)%(default)s" |
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195 if (unicode_protect and arg == "s") |
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196 else "%(name)s%(default)s" |
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197 ) |
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198 % { |
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199 "name": name[idx][0] if (name and idx in name) else "arg_%i" % idx, |
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200 "default": "=" + default[idx] if (default and idx in default) else "", |
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201 } |
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202 ) |
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203 # give arg_1, arg2, etc or name1, name2=default, etc. |
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204 # give unicode(arg_1), unicode(arg_2), etc. if unicode_protect is set and arg is a string |
| 2085 | 205 idx += 1 |
| 206 | |
| 207 return ", ".join(attr_string) | |
| 208 | |
| 209 def getTemplatePath(self, template_file): | |
| 210 """return template path corresponding to file name | |
| 211 | |
| 212 @param template_file(str): name of template file | |
| 213 """ | |
| 214 return os.path.join(self.constructor_dir, template_file) | |
| 215 | |
| 216 def core_completion_method(self, completion, function, default, arg_doc, async_): | |
| 217 """override this method to extend completion""" | |
| 218 pass | |
| 219 | |
| 220 def core_completion_signal(self, completion, function, default, arg_doc, async_): | |
| 221 """override this method to extend completion""" | |
| 222 pass | |
| 223 | |
| 224 def frontend_completion_method(self, completion, function, default, arg_doc, async_): | |
| 225 """override this method to extend completion""" | |
| 226 pass | |
| 227 | |
| 228 def frontend_completion_signal(self, completion, function, default, arg_doc, async_): | |
| 229 """override this method to extend completion""" | |
| 230 pass | |
| 231 | |
| 232 def generate(self, side): | |
| 233 """generate bridge | |
| 234 | |
| 235 call generateCoreSide or generateFrontendSide if they exists | |
| 236 else call generic self._generate method | |
| 237 """ | |
| 238 try: | |
| 239 if side == "core": | |
| 240 method = self.generateCoreSide | |
| 241 elif side == "frontend": | |
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242 if not self.FRONTEND_ACTIVATE: |
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243 print(u"This constructor only handle core, please use core side") |
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244 sys.exit(1) |
| 2085 | 245 method = self.generateFrontendSide |
| 246 except AttributeError: | |
| 247 self._generate(side) | |
| 248 else: | |
| 249 method() | |
| 250 | |
| 251 def _generate(self, side): | |
| 252 """generate the backend | |
| 253 | |
| 254 this is a generic method which will use formats found in self.CORE_SIGNAL_FORMAT | |
| 255 and self.CORE_METHOD_FORMAT (standard format method will be used) | |
| 256 @param side(str): core or frontend | |
| 257 """ | |
| 258 side_vars = [] | |
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259 for var in ("FORMATS", "TEMPLATE", "DEST"): |
| 2085 | 260 attr = "{}_{}".format(side.upper(), var) |
| 261 value = getattr(self, attr) | |
| 262 if value is None: | |
| 263 raise NotImplementedError | |
| 264 side_vars.append(value) | |
| 265 | |
| 266 FORMATS, TEMPLATE, DEST = side_vars | |
| 267 del side_vars | |
| 268 | |
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269 parts = {part.upper(): [] for part in FORMATS} |
| 2085 | 270 sections = self.bridge_template.sections() |
| 271 sections.sort() | |
| 272 for section in sections: | |
| 273 function = self.getValues(section) | |
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274 print("Adding %s %s" % (section, function["type"])) |
| 2085 | 275 default = self.getDefault(section) |
| 276 arg_doc = self.getArgumentsDoc(section) | |
| 277 async_ = "async" in self.getFlags(section) | |
| 278 completion = { | |
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279 "sig_in": function["sig_in"] or "", |
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280 "sig_out": function["sig_out"] or "", |
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281 "category": "plugin" if function["category"] == "plugin" else "core", |
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282 "name": section, |
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283 # arguments with default values |
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284 "args": self.getArguments( |
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285 function["sig_in"], name=arg_doc, default=default |
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286 ), |
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287 } |
| 2085 | 288 |
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289 extend_method = getattr( |
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290 self, "{}_completion_{}".format(side, function["type"]) |
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291 ) |
| 2085 | 292 extend_method(completion, function, default, arg_doc, async_) |
| 293 | |
| 294 for part, fmt in FORMATS.iteritems(): | |
| 295 if part.startswith(function["type"]): | |
| 296 parts[part.upper()].append(fmt.format(**completion)) | |
| 297 | |
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298 # at this point, signals_part, methods_part and direct_calls should be filled, |
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299 # we just have to place them in the right part of the template |
| 2085 | 300 bridge = [] |
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301 const_override = { |
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302 env[len(C.ENV_OVERRIDE) :]: v |
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303 for env, v in os.environ.iteritems() |
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304 if env.startswith(C.ENV_OVERRIDE) |
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305 } |
| 2085 | 306 template_path = self.getTemplatePath(TEMPLATE) |
| 307 try: | |
| 308 with open(template_path) as template: | |
| 309 for line in template: | |
| 310 | |
| 311 for part, extend_list in parts.iteritems(): | |
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312 if line.startswith("##{}_PART##".format(part)): |
| 2085 | 313 bridge.extend(extend_list) |
| 314 break | |
| 315 else: | |
| 316 # the line is not a magic part replacement | |
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317 if line.startswith("const_"): |
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318 const_name = line[len("const_") : line.find(" = ")].strip() |
| 2085 | 319 if const_name in const_override: |
| 320 print("const {} overriden".format(const_name)) | |
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321 bridge.append( |
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322 "const_{} = {}".format( |
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323 const_name, const_override[const_name] |
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324 ) |
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325 ) |
| 2085 | 326 continue |
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327 bridge.append(line.replace("\n", "")) |
| 2085 | 328 except IOError: |
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329 print("can't open template file [{}]".format(template_path)) |
| 2085 | 330 sys.exit(1) |
| 331 | |
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332 # now we write to final file |
| 2085 | 333 self.finalWrite(DEST, bridge) |
| 334 | |
| 335 def finalWrite(self, filename, file_buf): | |
| 336 """Write the final generated file in [dest dir]/filename | |
| 337 | |
| 338 @param filename: name of the file to generate | |
| 339 @param file_buf: list of lines (stings) of the file | |
| 340 """ | |
| 341 if os.path.exists(self.args.dest_dir) and not os.path.isdir(self.args.dest_dir): | |
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342 print( |
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343 "The destination dir [%s] can't be created: a file with this name already exists !" |
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344 ) |
| 2085 | 345 sys.exit(1) |
| 346 try: | |
| 347 if not os.path.exists(self.args.dest_dir): | |
| 348 os.mkdir(self.args.dest_dir) | |
| 349 full_path = os.path.join(self.args.dest_dir, filename) | |
| 350 if os.path.exists(full_path) and not self.args.force: | |
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351 print( |
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352 "The destination file [%s] already exists ! Use --force to overwrite it" |
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353 % full_path |
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354 ) |
| 2085 | 355 try: |
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356 with open(full_path, "w") as dest_file: |
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357 dest_file.write("\n".join(file_buf)) |
| 2085 | 358 except IOError: |
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359 print("Can't open destination file [%s]" % full_path) |
| 2085 | 360 except OSError: |
| 361 print("It's not possible to generate the file, check your permissions") | |
| 362 exit(1) |