Mercurial > hg > fetch
annotate fetch.py @ 39:8addc3712e75
partially and borken support for subpaths
| author | Jeff Hammel <jhammel@mozilla.com> |
|---|---|
| date | Tue, 15 Nov 2011 13:53:54 -0800 |
| parents | 645d02834042 |
| children | e103ae19c2a0 |
| rev | line source |
|---|---|
| 0 | 1 #!/usr/bin/env python |
| 2 | |
| 3 """ | |
| 4 fetch stuff from the interwebs | |
| 5 """ | |
| 6 | |
| 7 import os | |
| 23 | 8 import shutil |
| 0 | 9 import sys |
| 10 import optparse | |
| 11 | |
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12 __all__ = ['Fetcher', 'Fetch', 'main'] |
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13 |
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14 def which(executable, path=os.environ['PATH']): |
| 15 | 15 """python equivalent of which; should really be in the stdlib""" |
| 16 dirs = path.split(os.pathsep) | |
| 17 for dir in dirs: | |
| 18 if os.path.isfile(os.path.join(dir, executable)): | |
| 19 return os.path.join(dir, executable) | |
| 7 | 20 |
| 0 | 21 class Fetcher(object): |
| 15 | 22 """abstract base class for resource fetchers""" |
| 0 | 23 |
| 15 | 24 @classmethod |
| 25 def match(cls, _type): | |
| 26 return _type == cls.type | |
| 0 | 27 |
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28 def __init__(self, url): |
| 17 | 29 self.subpath = None |
| 30 if '#' in url: | |
| 31 url, self.subpath = url.rsplit('#') | |
| 25 | 32 if self.subpath: |
| 33 self.subpath = self.subpath.split('/') | |
| 15 | 34 self.url = url |
| 0 | 35 |
| 15 | 36 def __call__(self, dest): |
| 17 | 37 raise NotImplementedError("Should be called by implementing class") |
| 38 | |
| 39 @classmethod | |
| 40 def doc(cls): | |
| 41 """return docstring for the instance""" | |
| 42 retval = getattr(cls, '__doc__', '').strip() | |
| 43 return ' '.join(retval.split()) | |
| 0 | 44 |
| 7 | 45 ### standard dispatchers - always available |
| 0 | 46 |
| 7 | 47 import tarfile |
| 0 | 48 import urllib2 |
| 7 | 49 from StringIO import StringIO |
| 0 | 50 |
| 5 | 51 class FileFetcher(Fetcher): |
| 15 | 52 """fetch a single file""" |
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53 # Note: subpath for single files is ignored |
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54 |
| 15 | 55 type = 'file' |
| 0 | 56 |
| 15 | 57 @classmethod |
| 58 def download(cls, url): | |
| 59 return urllib2.urlopen(url).read() | |
| 0 | 60 |
| 15 | 61 def __call__(self, dest): |
| 25 | 62 |
| 15 | 63 if os.path.isdir(dest): |
| 64 filename = self.url.rsplit('/', 1)[-1] | |
| 65 dest = os.path.join(dest, filename) | |
| 66 f = file(dest, 'w') | |
| 67 f.write(self.download(self.url)) | |
| 68 f.close() | |
| 0 | 69 |
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70 |
| 5 | 71 class TarballFetcher(FileFetcher): |
| 15 | 72 """fetch and extract a tarball""" |
| 0 | 73 |
| 15 | 74 type = 'tar' |
| 0 | 75 |
| 15 | 76 def __call__(self, dest): |
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77 if os.path.exists(dest): |
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78 assert os.path.isdir(dest), "Destination must be a directory" |
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79 else: |
| 35 | 80 os.makedirs(dest) |
| 15 | 81 buffer = StringIO() |
| 82 buffer.write(self.download(self.url)) | |
| 83 buffer.seek(0) | |
| 84 tf = tarfile.open(mode='r', fileobj=buffer) | |
| 38 | 85 members = tf.getmembers() |
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86 if self.subpath: |
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87 |
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88 # build list of files to extract |
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89 _members = [] |
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90 |
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91 toppath = None |
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92 for member in members: |
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93 split = member.name.split(os.path.sep) |
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94 if toppath: |
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95 # ensure that for subpaths that only one top level directory exists |
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96 # XXX needed? |
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97 assert toppath == split[0], "Multiple top-level archives found" |
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98 else: |
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99 toppath = split[0] |
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100 if split and split[1:len(self.subpath)] == self.subpath: |
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101 import pdb; pdb.set_trace() |
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102 |
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103 members = _members |
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104 |
| 38 | 105 for member in members: |
| 106 tf.extract(member, dest) | |
| 7 | 107 |
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108 fetchers = [FileFetcher, TarballFetcher] |
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109 |
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110 ### VCS fetchers |
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111 |
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112 import subprocess |
| 19 | 113 try: |
| 114 from subprocess import check_call as call | |
| 115 except ImportErorr: | |
| 116 raise # we need check_call, kinda | |
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117 |
| 17 | 118 class VCSFetcher(Fetcher): |
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119 |
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120 command = None |
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121 |
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122 def call(*args, **kwargs): |
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123 assert command is not None, "Abstract base class" |
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124 call([self.command] + list(args), **kwargs) |
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125 |
| 17 | 126 def __init__(self, url, export=True): |
| 127 """ | |
| 128 - export : whether to strip the versioning information | |
| 129 """ | |
| 130 Fetcher.__init__(self, url) | |
| 131 self.export = export | |
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132 self.prog = self.type # name of app program |
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133 self.vcs_dir = '.' + self.type # subdirectory for version control |
| 17 | 134 |
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135 def __call__(self, dest): |
| 25 | 136 |
| 137 if self.subpath or self.export: | |
| 138 # can only export with a subpath | |
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139 self.export(dest, subpath=self.subpath) |
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140 return |
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141 |
| 25 | 142 if os.path.exists(dest): |
| 143 assert os.path.isdir(dest) | |
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144 else: |
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145 self.clone(dest) |
| 25 | 146 |
| 147 def export(self, dest): | |
| 148 """ | |
| 149 export a clone of the directory | |
| 150 """ | |
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151 dest = os.path.abspath(dest) |
| 25 | 152 tmpdir = tempfile.mkdtmp() |
| 153 self.clone(tmpdir) | |
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154 path = tmpdir |
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155 if self.subpath: |
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156 path = os.path.join([tmpdir] + self.subpath) |
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157 assert os.path.exists(path), "subpath %s of %s not found" % (os.path.sep.join(self.subpath), self.url) |
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158 if os.path.isdir(path): |
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159 if os.path.exists(dest): |
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160 assert os.path.isdir(dest), "source is a directory; destination is a file" |
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161 else: |
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162 os.makedirs(dest) |
| 27 | 163 shutil.copytree(path, dest) |
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164 else: |
| 27 | 165 if not os.path.exists(dest): |
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166 directory, filename = os.path.split(dest) |
| 27 | 167 if os.path.exists(directory): |
| 168 assert os.path.isdir(directory), "%s is not a directory" % directory | |
| 169 else: | |
| 170 os.makedirs(directory) | |
| 171 shutil.copy(path, dest) | |
| 25 | 172 shutil.rmtree(tmpdir) |
| 173 | |
| 174 def clone(self, dest): | |
| 175 """ | |
| 176 clones into a directory | |
| 177 """ | |
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178 raise NotImplementedError("Abstract base class") |
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179 |
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180 def update(self, dest): |
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181 """ |
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182 updates a checkout |
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183 """ |
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184 raise NotImplementedError("Abstract base class") |
| 25 | 185 |
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186 def versioned(self, directory): |
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187 return os.path.exists(os.path.join(directory, self.vcs_dir)) |
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188 |
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189 |
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190 if which('hg'): |
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191 |
| 17 | 192 class HgFetcher(VCSFetcher): |
| 15 | 193 """checkout a mercurial repository""" |
| 194 type = 'hg' | |
| 0 | 195 |
| 19 | 196 def __init__(self, url, export=True): |
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197 VCSFetcher.__init__(self, url, export=export) |
| 19 | 198 self.hg = which('hg') |
| 25 | 199 assert self.hg, "'hg' command not found" |
| 19 | 200 |
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201 def clone(self, dest): |
| 23 | 202 if os.path.exists(dest): |
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203 assert os.path.isdir(dest) |
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204 call([self.hg, 'clone', self.url, dest]) |
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205 |
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206 def update(self, dest): |
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207 assert os.path.versioned(dest) |
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208 assert os.path.exists(dest) |
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209 call([self.hg, 'pull', self.url], cwd=dest) |
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210 call([self.hg, 'update', '-C'], cwd=dest) |
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211 |
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212 |
| 15 | 213 fetchers.append(HgFetcher) |
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214 |
| 15 | 215 if which('git'): |
| 17 | 216 |
| 15 | 217 class GitFetcher(Fetcher): |
| 218 """checkout a git repository""" | |
| 219 type = 'git' | |
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220 |
| 20 | 221 def __init__(self, url, export=True): |
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222 VCSFetcher.__init__(self, url, export=export) |
| 23 | 223 self.git = which('git') |
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224 assert self.git, "'git' command not found" |
| 23 | 225 |
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226 def update(self, dest): |
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227 assert os.path.isdir(dest) |
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228 assert os.path.versioned(dest) |
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229 call([self.git, 'pull', self.url], cwd=dest) |
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230 call([self.git, 'update'], cwd=dest) |
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231 |
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232 def clone(self, dest): |
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233 if not os.path.exists(dest): |
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234 os.makedirs(dest) |
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235 call([self.git, 'clone', self.url, dest]) |
| 20 | 236 |
| 237 fetchers.append(GitFetcher) | |
| 17 | 238 |
| 16 | 239 __all__ += [i.__name__ for i in fetchers] |
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240 |
| 0 | 241 class Fetch(object): |
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242 |
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243 def __init__(self, fetchers=fetchers[:], relative_to=None, strict=True, clobber=True): |
| 15 | 244 self.fetchers = fetchers |
| 245 self.relative_to = relative_to | |
| 246 self.strict = strict | |
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247 self._clobber = clobber |
| 0 | 248 |
| 15 | 249 def fetcher(self, _type): |
| 250 """find the fetcher for the appropriate type""" | |
| 251 for fetcher in fetchers: | |
| 252 if fetcher.match(_type): | |
| 253 return fetcher | |
| 0 | 254 |
| 15 | 255 def __call__(self, url, destination, type, **options): |
| 256 fetcher = self.fetcher(type) | |
| 257 assert fetcher is not None, "No fetcher found for type '%s'" % type | |
| 258 fetcher = fetcher(url, **options) | |
| 259 fetcher(destination) | |
| 2 | 260 |
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261 def clobber(self, dest): |
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262 """clobbers if self._clobber is set""" |
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263 if self._clobber and os.path.exists(dest): |
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264 if os.path.isfile(dest): |
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265 os.remove(dest) |
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266 else: |
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267 shutil.rmtree(dest) |
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268 |
| 15 | 269 def fetch(self, *items): |
| 2 | 270 |
| 15 | 271 if self.strict: |
| 272 # ensure all the required fetchers are available | |
| 273 types = set([i['type'] for i in items]) | |
| 274 assert not [i for i in types | |
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275 if not [True for fetcher in fetchers |
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276 if fetcher.match(i)]] |
| 4 | 277 |
| 15 | 278 for item in items: |
| 4 | 279 |
| 15 | 280 # fix up relative paths |
| 281 dest = item['dest'] | |
| 282 if not os.path.isabs(dest): | |
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283 relative_to = self.relative_to |
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284 if not relative_to: |
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285 if isinstance(item['manifest'], basestring): |
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286 relative_to = os.path.dirname(os.path.abspath(item['manifest'])) |
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287 else: |
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288 relative_to = os.getcwd() |
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289 dest = os.path.normpath(os.path.join(relative_to, dest)) |
| 4 | 290 |
| 15 | 291 # fetch the items |
| 292 self(item['url'], destination=dest, type=item['type'], **item['options']) | |
| 0 | 293 |
| 21 | 294 |
| 0 | 295 format_string = "[URL] [destination] [type] <options>" |
| 296 def read_manifests(*manifests): | |
| 15 | 297 """ |
| 298 read some manifests and return the items | |
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299 |
| 15 | 300 Format: |
| 301 %s | |
| 302 """ % format_string | |
| 0 | 303 |
| 15 | 304 retval = [] |
| 0 | 305 |
| 15 | 306 for manifest in manifests: |
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307 if isinstance(manifest, basestring): |
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308 assert os.path.exists(manifest), "manifest '%s' not found" % manifest |
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309 f = file(manifest) |
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310 else: |
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311 f = manifest |
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312 |
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313 for line in f.readlines(): |
| 15 | 314 line = line.strip() |
| 315 if line.startswith('#') or not line: | |
| 316 continue | |
| 317 line = line.split() | |
| 318 if len(line) not in (3,4): | |
| 319 raise Exception("Format should be: %s; line %s" % (format_string, line)) | |
| 320 options = {} | |
| 321 if len(line) == 4: | |
| 322 option_string = line.pop().rstrip(',') | |
| 323 try: | |
| 324 options = dict([[j.strip() for j in i.split('=', 1)] | |
| 325 for i in option_string.split(',')]) | |
| 326 except: | |
| 327 raise Exception("Options format should be: key=value,key2=value2,...; got %s" % option_string) | |
| 0 | 328 |
| 15 | 329 url, dest, _type = line |
| 330 retval.append(dict(url=url, dest=dest, type=_type, options=options, manifest=manifest)) | |
| 331 return retval | |
| 0 | 332 |
| 2 | 333 def main(args=sys.argv[1:]): |
| 0 | 334 |
| 15 | 335 # parse command line options |
| 336 usage = '%prog [options] manifest [manifest] [...]' | |
| 0 | 337 |
| 15 | 338 class PlainDescriptionFormatter(optparse.IndentedHelpFormatter): |
| 339 def format_description(self, description): | |
| 340 if description: | |
| 341 return description + '\n' | |
| 342 else: | |
| 343 return '' | |
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344 |
| 15 | 345 parser = optparse.OptionParser(usage=usage, description=__doc__, formatter=PlainDescriptionFormatter()) |
| 346 parser.add_option('-o', '--output', | |
| 347 help="output relative to this location vs. the manifest location") | |
| 17 | 348 parser.add_option('-d', '--dest', # XXX unused |
| 15 | 349 action='append', |
| 350 help="output only these destinations") | |
| 351 parser.add_option('-s', '--strict', | |
| 352 action='store_true', default=False, | |
| 353 help="fail on error") | |
| 354 parser.add_option('--list-fetchers', dest='list_fetchers', | |
| 355 action='store_true', default=False, | |
| 356 help='list available fetchers and exit') | |
| 357 options, args = parser.parse_args(args) | |
| 0 | 358 |
| 15 | 359 if options.list_fetchers: |
| 17 | 360 types = set() |
| 361 for fetcher in fetchers: | |
| 362 if fetcher.type in types: | |
| 363 continue # occluded, should probably display separately | |
| 364 print '%s : %s' % (fetcher.type, fetcher.doc()) | |
| 365 types.add(fetcher.type) | |
| 15 | 366 parser.exit() |
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367 |
| 15 | 368 if not args: |
| 17 | 369 # TODO: could read from stdin |
| 15 | 370 parser.print_help() |
| 371 parser.exit() | |
| 0 | 372 |
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373 # sanity check |
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374 assert not [i for i in args if not os.path.exists(i)] |
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375 |
| 15 | 376 items = read_manifests(*args) |
| 32 | 377 fetch = Fetch(fetchers, relative_to=options.output, strict=options.strict) |
| 0 | 378 |
| 15 | 379 # download the files |
| 380 fetch.fetch(*items) | |
| 0 | 381 |
| 382 if __name__ == '__main__': | |
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383 main() |
| 0 | 384 |