Mercurial > hg > dotemacs
annotate elpa/elpy-1.14.1/elpy/jedibackend.py @ 156:c745e2cc79ee
elpy: update along with direct deps
| author | Jordi Gutiérrez Hermoso <jordigh@octave.org> |
|---|---|
| date | Mon, 27 Feb 2017 12:17:38 -0500 |
| parents | elpa/elpy-1.12.0/elpy/jedibackend.py@55ceabc58fcc |
| children |
| rev | line source |
|---|---|
| 98 | 1 """Elpy backend using the Jedi library. |
| 2 | |
| 3 This backend uses the Jedi library: | |
| 4 | |
| 5 https://github.com/davidhalter/jedi | |
| 6 | |
| 7 """ | |
| 8 | |
| 9 import sys | |
| 10 import traceback | |
| 11 | |
| 12 import jedi | |
| 13 | |
| 14 from elpy import rpc | |
| 15 | |
| 16 | |
| 17 class JediBackend(object): | |
| 18 """The Jedi backend class. | |
| 19 | |
| 20 Implements the RPC calls we can pass on to Jedi. | |
| 21 | |
| 22 Documentation: http://jedi.jedidjah.ch/en/latest/docs/plugin-api.html | |
| 23 | |
| 24 """ | |
| 25 name = "jedi" | |
| 26 | |
| 27 def __init__(self, project_root): | |
| 28 self.project_root = project_root | |
| 29 self.completions = {} | |
| 30 sys.path.append(project_root) | |
| 31 | |
| 32 def rpc_get_completions(self, filename, source, offset): | |
| 33 line, column = pos_to_linecol(source, offset) | |
| 34 proposals = run_with_debug(jedi, 'completions', | |
| 35 source=source, line=line, column=column, | |
| 36 path=filename, encoding='utf-8') | |
| 37 if proposals is None: | |
| 38 return [] | |
| 39 self.completions = dict((proposal.name, proposal) | |
| 40 for proposal in proposals) | |
|
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41 return [{'name': proposal.name.rstrip("="), |
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42 'suffix': proposal.complete.rstrip("="), |
| 98 | 43 'annotation': proposal.type, |
| 44 'meta': proposal.description} | |
| 45 for proposal in proposals] | |
| 46 | |
| 47 def rpc_get_completion_docstring(self, completion): | |
| 48 proposal = self.completions.get(completion) | |
| 49 if proposal is None: | |
| 50 return None | |
| 51 else: | |
| 52 return proposal.docstring(fast=False) | |
| 53 | |
| 54 def rpc_get_completion_location(self, completion): | |
| 55 proposal = self.completions.get(completion) | |
| 56 if proposal is None: | |
| 57 return None | |
| 58 else: | |
| 59 return (proposal.module_path, proposal.line) | |
| 60 | |
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61 def rpc_get_docstring(self, filename, source, offset): |
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62 line, column = pos_to_linecol(source, offset) |
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63 try: |
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64 locations = run_with_debug(jedi, 'goto_definitions', |
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65 source=source, line=line, column=column, |
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66 path=filename, encoding='utf-8', |
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67 re_raise=jedi.NotFoundError) |
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68 except jedi.NotFoundError: |
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69 return None |
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70 if locations: |
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71 return ('Documentation for {0}:\n\n'.format( |
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72 locations[-1].full_name) + locations[-1].docstring()) |
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73 else: |
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74 return None |
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75 |
| 98 | 76 def rpc_get_definition(self, filename, source, offset): |
| 77 line, column = pos_to_linecol(source, offset) | |
| 78 try: | |
| 79 locations = run_with_debug(jedi, 'goto_definitions', | |
| 80 source=source, line=line, column=column, | |
| 81 path=filename, encoding='utf-8', | |
| 82 re_raise=jedi.NotFoundError) | |
| 83 except jedi.NotFoundError: | |
| 84 return None | |
| 85 # goto_definitions() can return silly stuff like __builtin__ | |
| 86 # for int variables, so we fall back on goto() in those | |
| 87 # cases. See issue #76. | |
| 88 if ( | |
| 89 locations and | |
| 90 locations[0].module_path is None | |
| 91 ): | |
| 92 locations = run_with_debug(jedi, 'goto_assignments', | |
| 93 source=source, line=line, | |
| 94 column=column, | |
| 95 path=filename, encoding='utf-8') | |
| 96 if not locations: | |
| 97 return None | |
| 98 else: | |
| 99 loc = locations[-1] | |
| 100 try: | |
| 101 if loc.module_path: | |
| 102 if loc.module_path == filename: | |
| 103 offset = linecol_to_pos(source, | |
| 104 loc.line, | |
| 105 loc.column) | |
| 106 else: | |
| 107 with open(loc.module_path) as f: | |
| 108 offset = linecol_to_pos(f.read(), | |
| 109 loc.line, | |
| 110 loc.column) | |
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111 else: |
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112 return None |
| 98 | 113 except IOError: |
| 114 return None | |
| 115 return (loc.module_path, offset) | |
| 116 | |
| 117 def rpc_get_calltip(self, filename, source, offset): | |
| 118 line, column = pos_to_linecol(source, offset) | |
| 119 calls = run_with_debug(jedi, 'call_signatures', | |
| 120 source=source, line=line, column=column, | |
| 121 path=filename, encoding='utf-8') | |
| 122 if calls: | |
| 123 call = calls[0] | |
| 124 else: | |
| 125 call = None | |
| 126 if not call: | |
| 127 return None | |
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128 try: |
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129 call.index |
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130 except AttributeError as e: |
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131 if "get_definition" in str(e): |
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132 # Bug #627 / jedi#573 |
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133 return None |
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134 elif "get_subscope_by_name" in str(e): |
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135 # Bug #677 / jedi#628 |
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136 return None |
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137 else: |
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138 raise |
| 98 | 139 return {"name": call.name, |
| 140 "index": call.index, | |
| 141 "params": [param.description for param in call.params]} | |
| 142 | |
| 143 def rpc_get_usages(self, filename, source, offset): | |
| 144 """Return the uses of the symbol at offset. | |
| 145 | |
| 146 Returns a list of occurrences of the symbol, as dicts with the | |
| 147 fields name, filename, and offset. | |
| 148 | |
| 149 """ | |
| 150 line, column = pos_to_linecol(source, offset) | |
| 151 try: | |
| 152 uses = run_with_debug(jedi, 'usages', | |
| 153 source=source, line=line, column=column, | |
| 154 path=filename, encoding='utf-8', | |
| 155 re_raise=(jedi.NotFoundError,)) | |
| 156 except jedi.NotFoundError: | |
| 157 return [] | |
| 158 | |
| 159 if uses is None: | |
| 160 return None | |
| 161 result = [] | |
| 162 for use in uses: | |
| 163 if use.module_path == filename: | |
| 164 offset = linecol_to_pos(source, use.line, use.column) | |
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165 elif use.module_path is not None: |
| 98 | 166 with open(use.module_path) as f: |
| 167 text = f.read() | |
| 168 offset = linecol_to_pos(text, use.line, use.column) | |
| 169 | |
| 170 result.append({"name": use.name, | |
| 171 "filename": use.module_path, | |
| 172 "offset": offset}) | |
| 173 | |
| 174 return result | |
| 175 | |
| 176 | |
| 177 # From the Jedi documentation: | |
| 178 # | |
| 179 # line is the current line you want to perform actions on (starting | |
| 180 # with line #1 as the first line). column represents the current | |
| 181 # column/indent of the cursor (starting with zero). source_path | |
| 182 # should be the path of your file in the file system. | |
| 183 | |
| 184 def pos_to_linecol(text, pos): | |
| 185 """Return a tuple of line and column for offset pos in text. | |
| 186 | |
| 187 Lines are one-based, columns zero-based. | |
| 188 | |
| 189 This is how Jedi wants it. Don't ask me why. | |
| 190 | |
| 191 """ | |
| 192 line_start = text.rfind("\n", 0, pos) + 1 | |
| 193 line = text.count("\n", 0, line_start) + 1 | |
| 194 col = pos - line_start | |
| 195 return line, col | |
| 196 | |
| 197 | |
| 198 def linecol_to_pos(text, line, col): | |
| 199 """Return the offset of this line and column in text. | |
| 200 | |
| 201 Lines are one-based, columns zero-based. | |
| 202 | |
| 203 This is how Jedi wants it. Don't ask me why. | |
| 204 | |
| 205 """ | |
| 206 nth_newline_offset = 0 | |
| 207 for i in range(line - 1): | |
| 208 new_offset = text.find("\n", nth_newline_offset) | |
| 209 if new_offset < 0: | |
| 210 raise ValueError("Text does not have {0} lines." | |
| 211 .format(line)) | |
| 212 nth_newline_offset = new_offset + 1 | |
| 213 offset = nth_newline_offset + col | |
| 214 if offset > len(text): | |
| 215 raise ValueError("Line {0} column {1} is not within the text" | |
| 216 .format(line, col)) | |
| 217 return offset | |
| 218 | |
| 219 | |
| 220 def run_with_debug(jedi, name, *args, **kwargs): | |
| 221 re_raise = kwargs.pop('re_raise', ()) | |
| 222 # Remove form feed characters, they confuse Jedi (jedi#424) | |
| 223 if 'source' in kwargs: | |
| 224 kwargs['source'] = kwargs['source'].replace("\f", " ") | |
| 225 try: | |
| 226 script = jedi.Script(*args, **kwargs) | |
| 227 return getattr(script, name)() | |
| 228 except Exception as e: | |
| 229 if isinstance(e, re_raise): | |
| 230 raise | |
| 231 # Bug jedi#417 | |
| 232 if isinstance(e, TypeError) and str(e) == 'no dicts allowed': | |
| 233 return None | |
| 234 # Bug jedi#427 | |
| 235 if isinstance(e, UnicodeDecodeError): | |
| 236 return None | |
| 237 # Bug jedi#429 | |
| 238 if isinstance(e, IndexError): | |
| 239 return None | |
| 240 # Bug jedi#431 | |
| 241 if isinstance(e, AttributeError) and str(e).endswith("'end_pos'"): | |
| 242 return None | |
| 243 # Bug in Python 2.6, see #275 | |
| 244 if isinstance(e, OSError) and e.errno == 13: | |
| 245 return None | |
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246 # Bug jedi#466 |
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247 if ( |
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248 isinstance(e, SyntaxError) and |
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249 "EOL while scanning string literal" in str(e) |
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250 ): |
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251 return None |
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252 # Bug jedi#482 |
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253 if isinstance(e, UnicodeEncodeError): |
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254 return None |
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255 # Bug jedi#485 |
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256 if ( |
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257 isinstance(e, ValueError) and |
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258 "invalid \\x escape" in str(e) |
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259 ): |
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260 return None |
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261 # Bug jedi#485 in Python 3 |
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262 if ( |
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263 isinstance(e, SyntaxError) and |
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264 "truncated \\xXX escape" in str(e) |
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265 ): |
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266 return None |
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267 # Bug jedi#465 |
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268 if ( |
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269 isinstance(e, SyntaxError) and |
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270 "encoding declaration in Unicode string" in str(e) |
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271 ): |
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272 return None |
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273 # Bug #337 / jedi#471 |
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274 if ( |
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275 isinstance(e, ImportError) and |
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276 "No module named" in str(e) |
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277 ): |
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278 return None |
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279 # Bug #365 / jedi#486 - fixed in Jedi 0.8.2 |
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280 if ( |
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281 isinstance(e, UnboundLocalError) and |
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282 "local variable 'path' referenced before assignment" in str(e) |
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283 ): |
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284 return None |
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285 # Bug #366 / jedi#491 |
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286 if ( |
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287 isinstance(e, ValueError) and |
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288 "__loader__ is None" in str(e) |
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289 ): |
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290 return None |
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291 # Bug #353 |
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292 if ( |
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293 isinstance(e, OSError) and |
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294 "No such file or directory" in str(e) |
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295 ): |
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296 return None |
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297 # Bug #561, #564, #570, #588, #593, #599 / jedi#572, jedi#579, jedi#590 |
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298 if isinstance(e, KeyError): |
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299 return None |
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300 # Bug #519 / jedi#610 |
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301 if ( |
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302 isinstance(e, RuntimeError) and |
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303 "maximum recursion depth exceeded" in str(e) |
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304 ): |
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305 return None |
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306 # Bug #563 / jedi#589 |
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307 if ( |
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308 isinstance(e, AttributeError) and |
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309 "MergedNamesDict" in str(e) |
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310 ): |
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311 return None |
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312 # Bug #615 / jedi#592 |
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313 if ( |
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314 isinstance(e, AttributeError) and |
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315 "ListComprehension" in str(e) |
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316 ): |
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317 return None |
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318 # Bug #569 / jedi#593 |
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319 if ( |
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320 isinstance(e, AttributeError) and |
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321 "names_dict" in str(e) |
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322 ): |
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323 return None |
| 98 | 324 |
| 325 from jedi import debug | |
| 326 | |
| 327 debug_info = [] | |
| 328 | |
| 329 def _debug(level, str_out): | |
| 330 if level == debug.NOTICE: | |
| 331 prefix = "[N]" | |
| 332 elif level == debug.WARNING: | |
| 333 prefix = "[W]" | |
| 334 else: | |
| 335 prefix = "[?]" | |
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336 debug_info.append(u"{0} {1}".format(prefix, str_out)) |
| 98 | 337 |
| 338 jedi.set_debug_function(_debug, speed=False) | |
| 339 try: | |
| 340 script = jedi.Script(*args, **kwargs) | |
| 341 return getattr(script, name)() | |
| 342 except Exception as e: | |
| 343 source = kwargs.get('source') | |
| 344 sc_args = [] | |
| 345 sc_args.extend(repr(arg) for arg in args) | |
| 346 sc_args.extend("{0}={1}".format(k, "source" if k == "source" | |
| 347 else repr(v)) | |
| 348 for (k, v) in kwargs.items()) | |
| 349 | |
| 350 data = { | |
| 351 "traceback": traceback.format_exc(), | |
| 352 "jedi_debug_info": {'script_args': ", ".join(sc_args), | |
| 353 'source': source, | |
| 354 'method': name, | |
| 355 'debug_info': debug_info} | |
| 356 } | |
| 357 raise rpc.Fault(message=str(e), | |
| 358 code=500, | |
| 359 data=data) | |
| 360 finally: | |
| 361 jedi.set_debug_function(None) |