Parse a Gemfile.lock. Code originally derived from Bundler's /bundler/lib/bundler/lockfile_parser.rb parser The parsing use a simple state machine, switching states based on sections headings. The result is a tree of Gems objects stored in self.dependencies.
| 345 | |
| 346 | |
| 347 | class GemfileLockParser: |
| 348 | """ |
| 349 | Parse a Gemfile.lock. Code originally derived from Bundler's |
| 350 | /bundler/lib/bundler/lockfile_parser.rb parser |
| 351 | |
| 352 | The parsing use a simple state machine, switching states based on sections |
| 353 | headings. The result is a tree of Gems objects stored in |
| 354 | self.dependencies. |
| 355 | """ |
| 356 | |
| 357 | def __init__(self, lockfile): |
| 358 | self.lockfile = lockfile |
| 359 | # map of a line start string to the next parsing state function |
| 360 | self.STATES = { |
| 361 | DEPENDENCIES: self.parse_dependency, |
| 362 | PLATFORMS: self.parse_platform, |
| 363 | BUNDLED: self.parse_bundler_version, |
| 364 | GIT: self.parse_options, |
| 365 | PATH: self.parse_options, |
| 366 | SVN: self.parse_options, |
| 367 | GEM: self.parse_options, |
| 368 | SPECS: self.parse_spec |
| 369 | } |
| 370 | |
| 371 | # the final tree of dependencies, keyed by name |
| 372 | self.dependency_tree = {} |
| 373 | |
| 374 | # the package that the gemfile.lock is for |
| 375 | self.primary_gem = None |
| 376 | |
| 377 | # a flat dict of all gems, keyed by name |
| 378 | self.all_gems = {} |
| 379 | |
| 380 | self.platforms = [] |
| 381 | |
| 382 | self.bundled_with = None |
| 383 | |
| 384 | # init parsing state |
| 385 | self.reset_state() |
| 386 | |
| 387 | # parse proper |
| 388 | for line in analysis.unicode_text_lines(lockfile): |
| 389 | line = line.rstrip() |
| 390 | |
| 391 | # reset state |
| 392 | if not line: |
| 393 | self.reset_state() |
| 394 | continue |
| 395 | |
| 396 | # switch to new state |
| 397 | if line in self.STATES: |
| 398 | if line in GEM_TYPES: |
| 399 | self.current_type = line |
| 400 | self.state = self.STATES[line] |
| 401 | continue |
| 402 | |
| 403 | # process state |
| 404 | if self.state: |