scripts/khr_util/registry_cache.py

   1 # -*- coding: utf-8 -*-
   2
   3 #-------------------------------------------------------------------------
   4 # drawElements Quality Program utilities
   5 # --------------------------------------
   6 #
   7 # Copyright 2015-2017 The Android Open Source Project
   8 #
   9 # Licensed under the Apache License, Version 2.0 (the "License");
  10 # you may not use this file except in compliance with the License.
  11 # You may obtain a copy of the License at
  12 #
  13 #      http://www.apache.org/licenses/LICENSE-2.0
  14 #
  15 # Unless required by applicable law or agreed to in writing, software
  16 # distributed under the License is distributed on an "AS IS" BASIS,
  17 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  18 # See the License for the specific language governing permissions and
  19 # limitations under the License.
  20 #
  21 #-------------------------------------------------------------------------
  22
  23 import os
  24 import sys
  25 import hashlib
  26
  27 from . import registry
  28
  29 sys.path.append(os.path.join(os.path.dirname(__file__), ".."))
  30
  31 from build.common import *
  32
  33 BASE_URL = ""
  34
  35 class RegistrySource:
  36         def __init__(self, repository, filename, revision, checksum):
  37                 self.repository = repository
  38                 self.filename   = filename
  39                 self.revision   = revision
  40                 self.checksum   = checksum
  41
  42         def __hash__(self):
  43                 return hash((self.repository, self.filename, self.revision, self.checksum))
  44
  45         def __eq__(self, other):
  46                 return (self.repository, self.filename, self.revision, self.checksum) == (other.repository, other.filename, other.revision, other.checksum)
  47
  48         def getFilename (self):
  49                 return os.path.basename(self.filename)
  50
  51         def getCacheFilename (self):
  52                 return "r%s-%s" % (self.revision, self.getFilename())
  53
  54         def getChecksum (self):
  55                 return self.checksum
  56
  57         def getRevision (self):
  58                 return self.revision
  59
  60         def getRepo (self):
  61                 return self.repository
  62
  63         def getRevision (self):
  64                 return self.revision
  65
  66         def getFilename (self):
  67                 return self.filename
  68
  69 def computeChecksum (data):
  70         return hashlib.sha256(data.replace('\r','').encode("utf-8")).hexdigest()
  71
  72 def makeSourceUrl (repository, revision, filename):
  73         return "%s/%s/%s" % (repository, revision, filename)
  74
  75 def checkoutGit (repository, revision, fullDstPath):
  76         if not os.path.exists(fullDstPath):
  77                 execute(["git", "clone", "--no-checkout", repository, fullDstPath])
  78
  79         pushWorkingDir(fullDstPath)
  80         try:
  81                 execute(["git", "fetch", repository, "+refs/heads/*:refs/remotes/origin/*"])
  82                 execute(["git", "checkout", revision])
  83         finally:
  84                 popWorkingDir()
  85
  86 def checkoutFile (repository, revision, filename, cacheDir):
  87         if sys.version_info < (3, 0):
  88                 from urllib2 import urlopen
  89         else:
  90                 from urllib.request import urlopen
  91
  92         try:
  93                 req             = urlopen(makeSourceUrl(repository, revision, filename))
  94                 data    = req.read()
  95         except IOError:
  96                 fullDstPath = os.path.join(cacheDir, "git")
  97
  98                 checkoutGit(repository, revision, fullDstPath)
  99                 f               = open(os.path.join(fullDstPath, filename), "rt")
 100                 data    = f.read()
 101                 f.close()
 102         except:
 103                 print(("Unexpected error:", sys.exc_info()[0]))
 104
 105         return data
 106
 107 def fetchFile (dstPath, repository, revision, filename, checksum, cacheDir):
 108         def writeFile (filename, data):
 109                 f = open(filename, 'wt')
 110                 f.write(data)
 111                 f.close()
 112
 113         if not os.path.exists(os.path.dirname(dstPath)):
 114                 os.makedirs(os.path.dirname(dstPath))
 115
 116         print(("Fetching %s/%s@%s" % (repository, filename, revision)))
 117         data            = checkoutFile(repository, revision, filename, cacheDir)
 118         gotChecksum     = computeChecksum(data)
 119
 120         if checksum != gotChecksum:
 121                 raise Exception("Checksum mismatch, expected %s, got %s" % (checksum, gotChecksum))
 122
 123         writeFile(dstPath, data)
 124
 125 def checkFile (filename, checksum):
 126         def readFile (filename):
 127                 f = open(filename, 'rt')
 128                 data = f.read()
 129                 f.close()
 130                 return data
 131
 132         if os.path.exists(filename):
 133                 return computeChecksum(readFile(filename)) == checksum
 134         else:
 135                 return False
 136
 137 g_registryCache = {}
 138
 139 def getRegistry (source):
 140         global g_registryCache
 141
 142         if source in g_registryCache:
 143                 return g_registryCache[source]
 144
 145         cacheDir        = os.path.join(os.path.dirname(__file__), "cache")
 146         cachePath       = os.path.join(cacheDir, source.getCacheFilename())
 147
 148         if not checkFile(cachePath, source.checksum):
 149                 fetchFile(cachePath, source.getRepo(), source.getRevision(), source.getFilename(), source.getChecksum(), cacheDir)
 150
 151         parsedReg       = registry.parse(cachePath)
 152
 153         g_registryCache[source] = parsedReg
 154
 155         return parsedReg