Mercurial > hg > fetch
annotate fetch.py @ 46:fb05b7616bd8
begin stubbing own copytree function :(
| author | Jeff Hammel <jhammel@mozilla.com> |
|---|---|
| date | Tue, 15 Nov 2011 14:53:08 -0800 |
| parents | 87c22bbcda2b |
| children | 72d461e2ccbd |
| rev | line source |
|---|---|
| 0 | 1 #!/usr/bin/env python |
| 2 | |
| 3 """ | |
| 4 fetch stuff from the interwebs | |
| 5 """ | |
| 6 | |
| 44 | 7 import optparse |
| 0 | 8 import os |
| 23 | 9 import shutil |
| 0 | 10 import sys |
| 44 | 11 import tempfile |
| 0 | 12 |
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13 __all__ = ['Fetcher', 'Fetch', 'main'] |
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14 |
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15 def which(executable, path=os.environ['PATH']): |
| 15 | 16 """python equivalent of which; should really be in the stdlib""" |
| 17 dirs = path.split(os.pathsep) | |
| 18 for dir in dirs: | |
| 19 if os.path.isfile(os.path.join(dir, executable)): | |
| 20 return os.path.join(dir, executable) | |
| 7 | 21 |
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22 def copytree(src, dst): |
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23 """ |
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24 replacement for shutil.copytree because of this nonsense from help(shutil.copytree): |
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25 "The destination directory must not already exist." |
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26 """ |
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27 |
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28 # if its a file, just copy it |
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29 if os.path.isfile(src): |
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30 shutil.copy2(src, dst) |
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31 return |
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32 |
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33 # otherwise a directory |
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34 assert os.path.isdir(src) |
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35 if os.path.exists(dst): |
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36 assert os.path.isdir(dst), "%s is a file, %s is a directory" % (src, dst) |
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37 else: |
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38 os.makedirs(dst) |
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39 |
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40 for dirpath, dirnames, filenames in os.walk(src): |
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41 import pdb; pdb.set_trace() |
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42 |
| 0 | 43 class Fetcher(object): |
| 15 | 44 """abstract base class for resource fetchers""" |
| 0 | 45 |
| 15 | 46 @classmethod |
| 47 def match(cls, _type): | |
| 48 return _type == cls.type | |
| 0 | 49 |
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50 def __init__(self, url): |
| 17 | 51 self.subpath = None |
| 52 if '#' in url: | |
| 53 url, self.subpath = url.rsplit('#') | |
| 25 | 54 if self.subpath: |
| 55 self.subpath = self.subpath.split('/') | |
| 15 | 56 self.url = url |
| 0 | 57 |
| 15 | 58 def __call__(self, dest): |
| 17 | 59 raise NotImplementedError("Should be called by implementing class") |
| 60 | |
| 61 @classmethod | |
| 62 def doc(cls): | |
| 63 """return docstring for the instance""" | |
| 64 retval = getattr(cls, '__doc__', '').strip() | |
| 65 return ' '.join(retval.split()) | |
| 0 | 66 |
| 7 | 67 ### standard dispatchers - always available |
| 0 | 68 |
| 7 | 69 import tarfile |
| 0 | 70 import urllib2 |
| 7 | 71 from StringIO import StringIO |
| 0 | 72 |
| 5 | 73 class FileFetcher(Fetcher): |
| 15 | 74 """fetch a single file""" |
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75 # Note: subpath for single files is ignored |
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76 |
| 15 | 77 type = 'file' |
| 0 | 78 |
| 15 | 79 @classmethod |
| 80 def download(cls, url): | |
| 81 return urllib2.urlopen(url).read() | |
| 0 | 82 |
| 15 | 83 def __call__(self, dest): |
| 25 | 84 |
| 15 | 85 if os.path.isdir(dest): |
| 86 filename = self.url.rsplit('/', 1)[-1] | |
| 87 dest = os.path.join(dest, filename) | |
| 88 f = file(dest, 'w') | |
| 89 f.write(self.download(self.url)) | |
| 90 f.close() | |
| 0 | 91 |
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92 |
| 5 | 93 class TarballFetcher(FileFetcher): |
| 15 | 94 """fetch and extract a tarball""" |
| 0 | 95 |
| 15 | 96 type = 'tar' |
| 0 | 97 |
| 15 | 98 def __call__(self, dest): |
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99 if os.path.exists(dest): |
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100 assert os.path.isdir(dest), "Destination must be a directory" |
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101 else: |
| 35 | 102 os.makedirs(dest) |
| 15 | 103 buffer = StringIO() |
| 104 buffer.write(self.download(self.url)) | |
| 105 buffer.seek(0) | |
| 106 tf = tarfile.open(mode='r', fileobj=buffer) | |
| 38 | 107 members = tf.getmembers() |
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108 if self.subpath: |
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109 |
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110 # build list of files to extract |
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111 _members = [] |
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112 |
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113 toppath = None |
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114 for member in members: |
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115 split = member.name.split(os.path.sep) |
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116 if toppath: |
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117 # ensure that for subpaths that only one top level directory exists |
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118 # XXX needed? |
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119 assert toppath == split[0], "Multiple top-level archives found" |
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120 else: |
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121 toppath = split[0] |
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122 if split and split[1:len(self.subpath)+1] == self.subpath: |
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123 member.name = os.path.sep.join(split[1:]) |
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124 _members.append(member) |
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125 |
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126 members = _members |
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127 |
| 38 | 128 for member in members: |
| 129 tf.extract(member, dest) | |
| 7 | 130 |
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131 fetchers = [FileFetcher, TarballFetcher] |
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132 |
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133 ### VCS fetchers |
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134 |
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135 import subprocess |
| 19 | 136 try: |
| 137 from subprocess import check_call as call | |
| 138 except ImportErorr: | |
| 139 raise # we need check_call, kinda | |
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140 |
| 17 | 141 class VCSFetcher(Fetcher): |
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142 |
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143 command = None # name of the VCS command (currently unused) |
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144 |
| 17 | 145 def __init__(self, url, export=True): |
| 146 """ | |
| 147 - export : whether to strip the versioning information | |
| 148 """ | |
| 149 Fetcher.__init__(self, url) | |
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150 self._export = export |
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151 self.prog = self.type # name of app program |
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152 self.vcs_dir = '.' + self.type # subdirectory for version control |
| 17 | 153 |
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154 def call(*args, **kwargs): |
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155 assert command is not None, "Abstract base class" |
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156 call([self.command] + list(args), **kwargs) |
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157 |
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158 def __call__(self, dest): |
| 25 | 159 |
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160 if self.subpath or self._export: |
| 25 | 161 # can only export with a subpath |
| 43 | 162 self.export(dest) |
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163 return |
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164 |
| 25 | 165 if os.path.exists(dest): |
| 166 assert os.path.isdir(dest) | |
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167 else: |
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168 self.clone(dest) |
| 25 | 169 |
| 170 def export(self, dest): | |
| 171 """ | |
| 172 export a clone of the directory | |
| 173 """ | |
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174 dest = os.path.abspath(dest) |
| 45 | 175 tmpdir = tempfile.mkdtemp() |
| 25 | 176 self.clone(tmpdir) |
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177 path = tmpdir |
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178 if self.subpath: |
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179 path = os.path.join([tmpdir] + self.subpath) |
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180 assert os.path.exists(path), "subpath %s of %s not found" % (os.path.sep.join(self.subpath), self.url) |
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181 if os.path.isdir(path): |
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182 if os.path.exists(dest): |
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183 assert os.path.isdir(dest), "source is a directory; destination is a file" |
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184 else: |
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185 os.makedirs(dest) |
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186 copytree(path, dest) |
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187 else: |
| 27 | 188 if not os.path.exists(dest): |
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189 directory, filename = os.path.split(dest) |
| 27 | 190 if os.path.exists(directory): |
| 191 assert os.path.isdir(directory), "%s is not a directory" % directory | |
| 192 else: | |
| 193 os.makedirs(directory) | |
| 194 shutil.copy(path, dest) | |
| 25 | 195 shutil.rmtree(tmpdir) |
| 196 | |
| 197 def clone(self, dest): | |
| 198 """ | |
| 199 clones into a directory | |
| 200 """ | |
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201 raise NotImplementedError("Abstract base class") |
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202 |
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203 def update(self, dest): |
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204 """ |
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205 updates a checkout |
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206 """ |
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207 raise NotImplementedError("Abstract base class") |
| 25 | 208 |
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209 def versioned(self, directory): |
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210 return os.path.exists(os.path.join(directory, self.vcs_dir)) |
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211 |
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212 |
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213 if which('hg'): |
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214 |
| 17 | 215 class HgFetcher(VCSFetcher): |
| 15 | 216 """checkout a mercurial repository""" |
| 217 type = 'hg' | |
| 0 | 218 |
| 19 | 219 def __init__(self, url, export=True): |
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220 VCSFetcher.__init__(self, url, export=export) |
| 19 | 221 self.hg = which('hg') |
| 25 | 222 assert self.hg, "'hg' command not found" |
| 19 | 223 |
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224 def clone(self, dest): |
| 23 | 225 if os.path.exists(dest): |
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226 assert os.path.isdir(dest) |
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227 call([self.hg, 'clone', self.url, dest]) |
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228 |
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229 def update(self, dest): |
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230 assert os.path.versioned(dest) |
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231 assert os.path.exists(dest) |
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232 call([self.hg, 'pull', self.url], cwd=dest) |
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233 call([self.hg, 'update', '-C'], cwd=dest) |
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234 |
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235 |
| 15 | 236 fetchers.append(HgFetcher) |
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237 |
| 15 | 238 if which('git'): |
| 17 | 239 |
| 15 | 240 class GitFetcher(Fetcher): |
| 241 """checkout a git repository""" | |
| 242 type = 'git' | |
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243 |
| 20 | 244 def __init__(self, url, export=True): |
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245 VCSFetcher.__init__(self, url, export=export) |
| 23 | 246 self.git = which('git') |
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247 assert self.git, "'git' command not found" |
| 23 | 248 |
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249 def update(self, dest): |
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250 assert os.path.isdir(dest) |
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251 assert os.path.versioned(dest) |
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252 call([self.git, 'pull', self.url], cwd=dest) |
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253 call([self.git, 'update'], cwd=dest) |
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254 |
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255 def clone(self, dest): |
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256 if not os.path.exists(dest): |
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257 os.makedirs(dest) |
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258 call([self.git, 'clone', self.url, dest]) |
| 20 | 259 |
| 260 fetchers.append(GitFetcher) | |
| 17 | 261 |
| 16 | 262 __all__ += [i.__name__ for i in fetchers] |
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263 |
| 0 | 264 class Fetch(object): |
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265 |
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266 def __init__(self, fetchers=fetchers[:], relative_to=None, strict=True, clobber=True): |
| 15 | 267 self.fetchers = fetchers |
| 268 self.relative_to = relative_to | |
| 269 self.strict = strict | |
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270 self._clobber = clobber |
| 0 | 271 |
| 15 | 272 def fetcher(self, _type): |
| 273 """find the fetcher for the appropriate type""" | |
| 274 for fetcher in fetchers: | |
| 275 if fetcher.match(_type): | |
| 276 return fetcher | |
| 0 | 277 |
| 15 | 278 def __call__(self, url, destination, type, **options): |
| 279 fetcher = self.fetcher(type) | |
| 280 assert fetcher is not None, "No fetcher found for type '%s'" % type | |
| 281 fetcher = fetcher(url, **options) | |
| 282 fetcher(destination) | |
| 2 | 283 |
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284 def clobber(self, dest): |
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285 """clobbers if self._clobber is set""" |
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286 if self._clobber and os.path.exists(dest): |
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287 if os.path.isfile(dest): |
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288 os.remove(dest) |
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289 else: |
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290 shutil.rmtree(dest) |
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291 |
| 15 | 292 def fetch(self, *items): |
| 2 | 293 |
| 15 | 294 if self.strict: |
| 295 # ensure all the required fetchers are available | |
| 296 types = set([i['type'] for i in items]) | |
| 297 assert not [i for i in types | |
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298 if not [True for fetcher in fetchers |
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299 if fetcher.match(i)]] |
| 4 | 300 |
| 15 | 301 for item in items: |
| 4 | 302 |
| 15 | 303 # fix up relative paths |
| 304 dest = item['dest'] | |
| 305 if not os.path.isabs(dest): | |
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306 relative_to = self.relative_to |
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307 if not relative_to: |
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308 if isinstance(item['manifest'], basestring): |
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309 relative_to = os.path.dirname(os.path.abspath(item['manifest'])) |
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310 else: |
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311 relative_to = os.getcwd() |
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312 dest = os.path.normpath(os.path.join(relative_to, dest)) |
| 4 | 313 |
| 15 | 314 # fetch the items |
| 315 self(item['url'], destination=dest, type=item['type'], **item['options']) | |
| 0 | 316 |
| 21 | 317 |
| 0 | 318 format_string = "[URL] [destination] [type] <options>" |
| 319 def read_manifests(*manifests): | |
| 15 | 320 """ |
| 321 read some manifests and return the items | |
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322 |
| 15 | 323 Format: |
| 324 %s | |
| 325 """ % format_string | |
| 0 | 326 |
| 15 | 327 retval = [] |
| 0 | 328 |
| 15 | 329 for manifest in manifests: |
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330 if isinstance(manifest, basestring): |
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331 assert os.path.exists(manifest), "manifest '%s' not found" % manifest |
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332 f = file(manifest) |
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333 else: |
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334 f = manifest |
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335 |
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336 for line in f.readlines(): |
| 15 | 337 line = line.strip() |
| 338 if line.startswith('#') or not line: | |
| 339 continue | |
| 340 line = line.split() | |
| 341 if len(line) not in (3,4): | |
| 342 raise Exception("Format should be: %s; line %s" % (format_string, line)) | |
| 343 options = {} | |
| 344 if len(line) == 4: | |
| 345 option_string = line.pop().rstrip(',') | |
| 346 try: | |
| 347 options = dict([[j.strip() for j in i.split('=', 1)] | |
| 348 for i in option_string.split(',')]) | |
| 349 except: | |
| 350 raise Exception("Options format should be: key=value,key2=value2,...; got %s" % option_string) | |
| 0 | 351 |
| 15 | 352 url, dest, _type = line |
| 353 retval.append(dict(url=url, dest=dest, type=_type, options=options, manifest=manifest)) | |
| 354 return retval | |
| 0 | 355 |
| 2 | 356 def main(args=sys.argv[1:]): |
| 0 | 357 |
| 15 | 358 # parse command line options |
| 359 usage = '%prog [options] manifest [manifest] [...]' | |
| 0 | 360 |
| 15 | 361 class PlainDescriptionFormatter(optparse.IndentedHelpFormatter): |
| 362 def format_description(self, description): | |
| 363 if description: | |
| 364 return description + '\n' | |
| 365 else: | |
| 366 return '' | |
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367 |
| 15 | 368 parser = optparse.OptionParser(usage=usage, description=__doc__, formatter=PlainDescriptionFormatter()) |
| 369 parser.add_option('-o', '--output', | |
| 370 help="output relative to this location vs. the manifest location") | |
| 17 | 371 parser.add_option('-d', '--dest', # XXX unused |
| 15 | 372 action='append', |
| 373 help="output only these destinations") | |
| 374 parser.add_option('-s', '--strict', | |
| 375 action='store_true', default=False, | |
| 376 help="fail on error") | |
| 377 parser.add_option('--list-fetchers', dest='list_fetchers', | |
| 378 action='store_true', default=False, | |
| 379 help='list available fetchers and exit') | |
| 380 options, args = parser.parse_args(args) | |
| 0 | 381 |
| 15 | 382 if options.list_fetchers: |
| 17 | 383 types = set() |
| 384 for fetcher in fetchers: | |
| 385 if fetcher.type in types: | |
| 386 continue # occluded, should probably display separately | |
| 387 print '%s : %s' % (fetcher.type, fetcher.doc()) | |
| 388 types.add(fetcher.type) | |
| 15 | 389 parser.exit() |
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390 |
| 15 | 391 if not args: |
| 17 | 392 # TODO: could read from stdin |
| 15 | 393 parser.print_help() |
| 394 parser.exit() | |
| 0 | 395 |
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396 # sanity check |
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397 assert not [i for i in args if not os.path.exists(i)] |
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398 |
| 15 | 399 items = read_manifests(*args) |
| 32 | 400 fetch = Fetch(fetchers, relative_to=options.output, strict=options.strict) |
| 0 | 401 |
| 15 | 402 # download the files |
| 403 fetch.fetch(*items) | |
| 0 | 404 |
| 405 if __name__ == '__main__': | |
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406 main() |
| 0 | 407 |