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 urllib2
  26 import hashlib
  27
  28 import registry
  29
  30 sys.path.append(os.path.join(os.path.dirname(__file__), ".."))
  31
  32 from build.common import *
  33
  34 BASE_URL = ""
  35
  36 class RegistrySource:
  37         def __init__(self, repository, filename, revision, checksum):
  38                 self.repository = repository
  39                 self.filename   = filename
  40                 self.revision   = revision
  41                 self.checksum   = checksum
  42
  43         def __hash__(self):
  44                 return hash((self.repository, self.filename, self.revision, self.checksum))
  45
  46         def __eq__(self, other):
  47                 return (self.repository, self.filename, self.revision, self.checksum) == (other.repository, other.filename, other.revision, other.checksum)
  48
  49         def getFilename (self):
  50                 return os.path.basename(self.filename)
  51
  52         def getCacheFilename (self):
  53                 return "r%s-%s" % (self.revision, self.getFilename())
  54
  55         def getChecksum (self):
  56                 return self.checksum
  57
  58         def getRevision (self):
  59                 return self.revision
  60
  61         def getRepo (self):
  62                 return self.repository
  63
  64         def getRevision (self):
  65                 return self.revision
  66
  67         def getFilename (self):
  68                 return self.filename
  69
  70 def computeChecksum (data):
  71         return hashlib.sha256(data).hexdigest()
  72
  73 def makeSourceUrl (repository, revision, filename):
  74         return "%s/%s/%s" % (repository, revision, filename)
  75
  76 def checkoutGit (repository, revision, fullDstPath):
  77         if not os.path.exists(fullDstPath):
  78                 execute(["git", "clone", "--no-checkout", repository, fullDstPath])
  79
  80         pushWorkingDir(fullDstPath)
  81         try:
  82                 execute(["git", "fetch", repository, "+refs/heads/*:refs/remotes/origin/*"])
  83                 execute(["git", "checkout", revision])
  84         finally:
  85                 popWorkingDir()
  86
  87 def checkoutFile (repository, revision, filename, cacheDir):
  88         try:
  89                 req             = urllib2.urlopen(makeSourceUrl(repository, revision, filename))
  90                 data    = req.read()
  91         except IOError:
  92                 fullDstPath = os.path.join(cacheDir, "git")
  93
  94                 checkoutGit(repository, revision, fullDstPath)
  95                 f               = open(os.path.join(fullDstPath, filename), "r")
  96                 data    = f.read()
  97                 f.close()
  98         except:
  99                 print "Unexpected error:", sys.exc_info()[0]
 100
 101         return data
 102
 103 def fetchFile (dstPath, repository, revision, filename, checksum, cacheDir):
 104         def writeFile (filename, data):
 105                 f = open(filename, 'wb')
 106                 f.write(data)
 107                 f.close()
 108
 109         if not os.path.exists(os.path.dirname(dstPath)):
 110                 os.makedirs(os.path.dirname(dstPath))
 111
 112         print "Fetching %s/%s@%s" % (repository, filename, revision)
 113         data            = checkoutFile(repository, revision, filename, cacheDir)
 114         gotChecksum     = computeChecksum(data)
 115
 116         if checksum != gotChecksum:
 117                 raise Exception("Checksum mismatch, expected %s, got %s" % (checksum, gotChecksum))
 118
 119         writeFile(dstPath, data)
 120
 121 def checkFile (filename, checksum):
 122         def readFile (filename):
 123                 f = open(filename, 'rb')
 124                 data = f.read()
 125                 f.close()
 126                 return data
 127
 128         if os.path.exists(filename):
 129                 return computeChecksum(readFile(filename)) == checksum
 130         else:
 131                 return False
 132
 133 g_registryCache = {}
 134
 135 def getRegistry (source):
 136         global g_registryCache
 137
 138         if source in g_registryCache:
 139                 return g_registryCache[source]
 140
 141         cacheDir        = os.path.join(os.path.dirname(__file__), "cache")
 142         cachePath       = os.path.join(cacheDir, source.getCacheFilename())
 143
 144         if not checkFile(cachePath, source.checksum):
 145                 fetchFile(cachePath, source.getRepo(), source.getRevision(), source.getFilename(), source.getChecksum(), cacheDir)
 146
 147         parsedReg       = registry.parse(cachePath)
 148
 149         g_registryCache[source] = parsedReg
 150
 151         return parsedReg