bridgedb/_version.py

   1
   2 # This file helps to compute a version number in source trees obtained from
   3 # git-archive tarball (such as those provided by githubs download-from-tag
   4 # feature). Distribution tarballs (built by setup.py sdist) and build
   5 # directories (produced by setup.py build) will contain a much shorter file
   6 # that just contains the computed version number.
   7
   8 # This file is released into the public domain. Generated by
   9 # versioneer-0.15 (https://github.com/warner/python-versioneer)
  10
  11 import errno
  12 import os
  13 import re
  14 import subprocess
  15 import sys
  16
  17
  18 def get_keywords():
  19     # these strings will be replaced by git during git-archive.
  20     # setup.py/versioneer.py will grep for the variable names, so they must
  21     # each be defined on a line of their own. _version.py will just call
  22     # get_keywords().
  23     git_refnames = "$Format:%d$"
  24     git_full = "$Format:%H$"
  25     keywords = {"refnames": git_refnames, "full": git_full}
  26     return keywords
  27
  28
  29 class VersioneerConfig:
  30     pass
  31
  32
  33 def get_config():
  34     # these strings are filled in when 'setup.py versioneer' creates
  35     # _version.py
  36     cfg = VersioneerConfig()
  37     cfg.VCS = "git"
  38     cfg.style = "pep440"
  39     cfg.tag_prefix = "bridgedb-"
  40     cfg.parentdir_prefix = "bridgedb-"
  41     cfg.versionfile_source = "bridgedb/_version.py"
  42     cfg.verbose = False
  43     return cfg
  44
  45
  46 class NotThisMethod(Exception):
  47     pass
  48
  49
  50 LONG_VERSION_PY = {}
  51 HANDLERS = {}
  52
  53
  54 def register_vcs_handler(vcs, method):  # decorator
  55     def decorate(f):
  56         if vcs not in HANDLERS:
  57             HANDLERS[vcs] = {}
  58         HANDLERS[vcs][method] = f
  59         return f
  60     return decorate
  61
  62
  63 def run_command(commands, args, cwd=None, verbose=False, hide_stderr=False):
  64     assert isinstance(commands, list)
  65     p = None
  66     for c in commands:
  67         try:
  68             dispcmd = str([c] + args)
  69             # remember shell=False, so use git.cmd on windows, not just git
  70             p = subprocess.Popen([c] + args, cwd=cwd, stdout=subprocess.PIPE,
  71                                  stderr=(subprocess.PIPE if hide_stderr
  72                                          else None))
  73             break
  74         except EnvironmentError:
  75             e = sys.exc_info()[1]
  76             if e.errno == errno.ENOENT:
  77                 continue
  78             if verbose:
  79                 print("unable to run %s" % dispcmd)
  80                 print(e)
  81             return None
  82     else:
  83         if verbose:
  84             print("unable to find command, tried %s" % (commands,))
  85         return None
  86     stdout = p.communicate()[0].strip()
  87     if sys.version_info[0] >= 3:
  88         stdout = stdout.decode()
  89     if p.returncode != 0:
  90         if verbose:
  91             print("unable to run %s (error)" % dispcmd)
  92         return None
  93     return stdout
  94
  95
  96 def versions_from_parentdir(parentdir_prefix, root, verbose):
  97     # Source tarballs conventionally unpack into a directory that includes
  98     # both the project name and a version string.
  99     dirname = os.path.basename(root)
 100     if not dirname.startswith(parentdir_prefix):
 101         if verbose:
 102             print("guessing rootdir is '%s', but '%s' doesn't start with "
 103                   "prefix '%s'" % (root, dirname, parentdir_prefix))
 104         raise NotThisMethod("rootdir doesn't start with parentdir_prefix")
 105     return {"version": dirname[len(parentdir_prefix):],
 106             "full-revisionid": None,
 107             "dirty": False, "error": None}
 108
 109
 110 @register_vcs_handler("git", "get_keywords")
 111 def git_get_keywords(versionfile_abs):
 112     # the code embedded in _version.py can just fetch the value of these
 113     # keywords. When used from setup.py, we don't want to import _version.py,
 114     # so we do it with a regexp instead. This function is not used from
 115     # _version.py.
 116     keywords = {}
 117     try:
 118         f = open(versionfile_abs, "r")
 119         for line in f.readlines():
 120             if line.strip().startswith("git_refnames ="):
 121                 mo = re.search(r'=\s*"(.*)"', line)
 122                 if mo:
 123                     keywords["refnames"] = mo.group(1)
 124             if line.strip().startswith("git_full ="):
 125                 mo = re.search(r'=\s*"(.*)"', line)
 126                 if mo:
 127                     keywords["full"] = mo.group(1)
 128         f.close()
 129     except EnvironmentError:
 130         pass
 131     return keywords
 132
 133
 134 @register_vcs_handler("git", "keywords")
 135 def git_versions_from_keywords(keywords, tag_prefix, verbose):
 136     if not keywords:
 137         raise NotThisMethod("no keywords at all, weird")
 138     refnames = keywords["refnames"].strip()
 139     if refnames.startswith("$Format"):
 140         if verbose:
 141             print("keywords are unexpanded, not using")
 142         raise NotThisMethod("unexpanded keywords, not a git-archive tarball")
 143     refs = set([r.strip() for r in refnames.strip("()").split(",")])
 144     # starting in git-1.8.3, tags are listed as "tag: foo-1.0" instead of
 145     # just "foo-1.0". If we see a "tag: " prefix, prefer those.
 146     TAG = "tag: "
 147     tags = set([r[len(TAG):] for r in refs if r.startswith(TAG)])
 148     if not tags:
 149         # Either we're using git < 1.8.3, or there really are no tags. We use
 150         # a heuristic: assume all version tags have a digit. The old git %d
 151         # expansion behaves like git log --decorate=short and strips out the
 152         # refs/heads/ and refs/tags/ prefixes that would let us distinguish
 153         # between branches and tags. By ignoring refnames without digits, we
 154         # filter out many common branch names like "release" and
 155         # "stabilization", as well as "HEAD" and "master".
 156         tags = set([r for r in refs if re.search(r'\d', r)])
 157         if verbose:
 158             print("discarding '%s', no digits" % ",".join(refs-tags))
 159     if verbose:
 160         print("likely tags: %s" % ",".join(sorted(tags)))
 161     for ref in sorted(tags):
 162         # sorting will prefer e.g. "2.0" over "2.0rc1"
 163         if ref.startswith(tag_prefix):
 164             r = ref[len(tag_prefix):]
 165             if verbose:
 166                 print("picking %s" % r)
 167             return {"version": r,
 168                     "full-revisionid": keywords["full"].strip(),
 169                     "dirty": False, "error": None
 170                     }
 171     # no suitable tags, so version is "0+unknown", but full hex is still there
 172     if verbose:
 173         print("no suitable tags, using unknown + full revision id")
 174     return {"version": "0+unknown",
 175             "full-revisionid": keywords["full"].strip(),
 176             "dirty": False, "error": "no suitable tags"}
 177
 178
 179 @register_vcs_handler("git", "pieces_from_vcs")
 180 def git_pieces_from_vcs(tag_prefix, root, verbose, run_command=run_command):
 181     # this runs 'git' from the root of the source tree. This only gets called
 182     # if the git-archive 'subst' keywords were *not* expanded, and
 183     # _version.py hasn't already been rewritten with a short version string,
 184     # meaning we're inside a checked out source tree.
 185
 186     if not os.path.exists(os.path.join(root, ".git")):
 187         if verbose:
 188             print("no .git in %s" % root)
 189         raise NotThisMethod("no .git directory")
 190
 191     GITS = ["git"]
 192     if sys.platform == "win32":
 193         GITS = ["git.cmd", "git.exe"]
 194     # if there is a tag, this yields TAG-NUM-gHEX[-dirty]
 195     # if there are no tags, this yields HEX[-dirty] (no NUM)
 196     describe_out = run_command(GITS, ["describe", "--tags", "--dirty",
 197                                       "--always", "--long"],
 198                                cwd=root)
 199     # --long was added in git-1.5.5
 200     if describe_out is None:
 201         raise NotThisMethod("'git describe' failed")
 202     describe_out = describe_out.strip()
 203     full_out = run_command(GITS, ["rev-parse", "HEAD"], cwd=root)
 204     if full_out is None:
 205         raise NotThisMethod("'git rev-parse' failed")
 206     full_out = full_out.strip()
 207
 208     pieces = {}
 209     pieces["long"] = full_out
 210     pieces["short"] = full_out[:7]  # maybe improved later
 211     pieces["error"] = None
 212
 213     # parse describe_out. It will be like TAG-NUM-gHEX[-dirty] or HEX[-dirty]
 214     # TAG might have hyphens.
 215     git_describe = describe_out
 216
 217     # look for -dirty suffix
 218     dirty = git_describe.endswith("-dirty")
 219     pieces["dirty"] = dirty
 220     if dirty:
 221         git_describe = git_describe[:git_describe.rindex("-dirty")]
 222
 223     # now we have TAG-NUM-gHEX or HEX
 224
 225     if "-" in git_describe:
 226         # TAG-NUM-gHEX
 227         mo = re.search(r'^(.+)-(\d+)-g([0-9a-f]+)$', git_describe)
 228         if not mo:
 229             # unparseable. Maybe git-describe is misbehaving?
 230             pieces["error"] = ("unable to parse git-describe output: '%s'"
 231                                % describe_out)
 232             return pieces
 233
 234         # tag
 235         full_tag = mo.group(1)
 236         if not full_tag.startswith(tag_prefix):
 237             if verbose:
 238                 fmt = "tag '%s' doesn't start with prefix '%s'"
 239                 print(fmt % (full_tag, tag_prefix))
 240             pieces["error"] = ("tag '%s' doesn't start with prefix '%s'"
 241                                % (full_tag, tag_prefix))
 242             return pieces
 243         pieces["closest-tag"] = full_tag[len(tag_prefix):]
 244
 245         # distance: number of commits since tag
 246         pieces["distance"] = int(mo.group(2))
 247
 248         # commit: short hex revision ID
 249         pieces["short"] = mo.group(3)
 250
 251     else:
 252         # HEX: no tags
 253         pieces["closest-tag"] = None
 254         count_out = run_command(GITS, ["rev-list", "HEAD", "--count"],
 255                                 cwd=root)
 256         pieces["distance"] = int(count_out)  # total number of commits
 257
 258     return pieces
 259
 260
 261 def plus_or_dot(pieces):
 262     if "+" in pieces.get("closest-tag", ""):
 263         return "."
 264     return "+"
 265
 266
 267 def render_pep440(pieces):
 268     # now build up version string, with post-release "local version
 269     # identifier". Our goal: TAG[+DISTANCE.gHEX[.dirty]] . Note that if you
 270     # get a tagged build and then dirty it, you'll get TAG+0.gHEX.dirty
 271
 272     # exceptions:
 273     # 1: no tags. git_describe was just HEX. 0+untagged.DISTANCE.gHEX[.dirty]
 274
 275     if pieces["closest-tag"]:
 276         rendered = pieces["closest-tag"]
 277         if pieces["distance"] or pieces["dirty"]:
 278             rendered += plus_or_dot(pieces)
 279             rendered += "%d.g%s" % (pieces["distance"], pieces["short"])
 280             if pieces["dirty"]:
 281                 rendered += ".dirty"
 282     else:
 283         # exception #1
 284         rendered = "0+untagged.%d.g%s" % (pieces["distance"],
 285                                           pieces["short"])
 286         if pieces["dirty"]:
 287             rendered += ".dirty"
 288     return rendered
 289
 290
 291 def render_pep440_pre(pieces):
 292     # TAG[.post.devDISTANCE] . No -dirty
 293
 294     # exceptions:
 295     # 1: no tags. 0.post.devDISTANCE
 296
 297     if pieces["closest-tag"]:
 298         rendered = pieces["closest-tag"]
 299         if pieces["distance"]:
 300             rendered += ".post.dev%d" % pieces["distance"]
 301     else:
 302         # exception #1
 303         rendered = "0.post.dev%d" % pieces["distance"]
 304     return rendered
 305
 306
 307 def render_pep440_post(pieces):
 308     # TAG[.postDISTANCE[.dev0]+gHEX] . The ".dev0" means dirty. Note that
 309     # .dev0 sorts backwards (a dirty tree will appear "older" than the
 310     # corresponding clean one), but you shouldn't be releasing software with
 311     # -dirty anyways.
 312
 313     # exceptions:
 314     # 1: no tags. 0.postDISTANCE[.dev0]
 315
 316     if pieces["closest-tag"]:
 317         rendered = pieces["closest-tag"]
 318         if pieces["distance"] or pieces["dirty"]:
 319             rendered += ".post%d" % pieces["distance"]
 320             if pieces["dirty"]:
 321                 rendered += ".dev0"
 322             rendered += plus_or_dot(pieces)
 323             rendered += "g%s" % pieces["short"]
 324     else:
 325         # exception #1
 326         rendered = "0.post%d" % pieces["distance"]
 327         if pieces["dirty"]:
 328             rendered += ".dev0"
 329         rendered += "+g%s" % pieces["short"]
 330     return rendered
 331
 332
 333 def render_pep440_old(pieces):
 334     # TAG[.postDISTANCE[.dev0]] . The ".dev0" means dirty.
 335
 336     # exceptions:
 337     # 1: no tags. 0.postDISTANCE[.dev0]
 338
 339     if pieces["closest-tag"]:
 340         rendered = pieces["closest-tag"]
 341         if pieces["distance"] or pieces["dirty"]:
 342             rendered += ".post%d" % pieces["distance"]
 343             if pieces["dirty"]:
 344                 rendered += ".dev0"
 345     else:
 346         # exception #1
 347         rendered = "0.post%d" % pieces["distance"]
 348         if pieces["dirty"]:
 349             rendered += ".dev0"
 350     return rendered
 351
 352
 353 def render_git_describe(pieces):
 354     # TAG[-DISTANCE-gHEX][-dirty], like 'git describe --tags --dirty
 355     # --always'
 356
 357     # exceptions:
 358     # 1: no tags. HEX[-dirty]  (note: no 'g' prefix)
 359
 360     if pieces["closest-tag"]:
 361         rendered = pieces["closest-tag"]
 362         if pieces["distance"]:
 363             rendered += "-%d-g%s" % (pieces["distance"], pieces["short"])
 364     else:
 365         # exception #1
 366         rendered = pieces["short"]
 367     if pieces["dirty"]:
 368         rendered += "-dirty"
 369     return rendered
 370
 371
 372 def render_git_describe_long(pieces):
 373     # TAG-DISTANCE-gHEX[-dirty], like 'git describe --tags --dirty
 374     # --always -long'. The distance/hash is unconditional.
 375
 376     # exceptions:
 377     # 1: no tags. HEX[-dirty]  (note: no 'g' prefix)
 378
 379     if pieces["closest-tag"]:
 380         rendered = pieces["closest-tag"]
 381         rendered += "-%d-g%s" % (pieces["distance"], pieces["short"])
 382     else:
 383         # exception #1
 384         rendered = pieces["short"]
 385     if pieces["dirty"]:
 386         rendered += "-dirty"
 387     return rendered
 388
 389
 390 def render(pieces, style):
 391     if pieces["error"]:
 392         return {"version": "unknown",
 393                 "full-revisionid": pieces.get("long"),
 394                 "dirty": None,
 395                 "error": pieces["error"]}
 396
 397     if not style or style == "default":
 398         style = "pep440"  # the default
 399
 400     if style == "pep440":
 401         rendered = render_pep440(pieces)
 402     elif style == "pep440-pre":
 403         rendered = render_pep440_pre(pieces)
 404     elif style == "pep440-post":
 405         rendered = render_pep440_post(pieces)
 406     elif style == "pep440-old":
 407         rendered = render_pep440_old(pieces)
 408     elif style == "git-describe":
 409         rendered = render_git_describe(pieces)
 410     elif style == "git-describe-long":
 411         rendered = render_git_describe_long(pieces)
 412     else:
 413         raise ValueError("unknown style '%s'" % style)
 414
 415     return {"version": rendered, "full-revisionid": pieces["long"],
 416             "dirty": pieces["dirty"], "error": None}
 417
 418
 419 def get_versions():
 420     # I am in _version.py, which lives at ROOT/VERSIONFILE_SOURCE. If we have
 421     # __file__, we can work backwards from there to the root. Some
 422     # py2exe/bbfreeze/non-CPython implementations don't do __file__, in which
 423     # case we can only use expanded keywords.
 424
 425     cfg = get_config()
 426     verbose = cfg.verbose
 427
 428     try:
 429         return git_versions_from_keywords(get_keywords(), cfg.tag_prefix,
 430                                           verbose)
 431     except NotThisMethod:
 432         pass
 433
 434     try:
 435         root = os.path.realpath(__file__)
 436         # versionfile_source is the relative path from the top of the source
 437         # tree (where the .git directory might live) to this file. Invert
 438         # this to find the root from __file__.
 439         for i in cfg.versionfile_source.split('/'):
 440             root = os.path.dirname(root)
 441     except NameError:
 442         return {"version": "0+unknown", "full-revisionid": None,
 443                 "dirty": None,
 444                 "error": "unable to find root of source tree"}
 445
 446     try:
 447         pieces = git_pieces_from_vcs(cfg.tag_prefix, root, verbose)
 448         return render(pieces, cfg.style)
 449     except NotThisMethod:
 450         pass
 451
 452     try:
 453         if cfg.parentdir_prefix:
 454             return versions_from_parentdir(cfg.parentdir_prefix, root, verbose)
 455     except NotThisMethod:
 456         pass
 457
 458     return {"version": "0+unknown", "full-revisionid": None,
 459             "dirty": None,
 460             "error": "unable to compute version"}