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dependencies.py
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dependencies.py
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import os
import tarfile
import zipfile
import re
import urllib
import requests
import platform
import subprocess
import json
import shutil
import io
import tempfile
from glob import glob
from default_platform import default_platform
import deps_cross_checker
import aws
# Master table of dependency types.
# A dependency definition can specify 'type' to inherit definitions from one of these.
# String values can depend on other string values from the dependency. For example,
# if 'name' is defined as 'Example' then '${name}.exe' will expand to 'Example.exe'.
# It does not matter which order the values are defined.
# String values can also depend on boolean values. For example, the string
# '${test-value?yes-result:no-result}' will get the value of the string named
# 'yes-result' if 'test-value' is a true boolean value, and the string named
# 'no-result' if 'test-value' is a false boolean value.
# Finally, string values can also depend on a lookup table defined as a JSON object.
# For example, given these definitions:
# {
# "servertable":{
# "Windows":"windows.openhome.org",
# "Linux":"linux.openhome.org",
# "*":"openhome.org"
# },
# "server":"${servertable[$system]}"
# }
# If 'system' is defined as 'Windows', then 'server' will be defined as
# 'windows.openhome.org'. The '*' entry is the default: if a lookup fails the default
# will be used instead.
# The principle string values that must be defined are 'archive-path' to point to the
# .tar.gz file with the dependency's binaries, 'dest' to specify where to untar it,
# and 'configure-args' to specify the list of arguments to pass to waf.
# In order for source control fetching to work, the string 'source-git' should point
# to the git repo and 'tag' should identify the git tag that corresponds to the
# fetched binaries.
DEPENDENCY_TYPES = {
# Label a dependency with the 'ignore' type to prevent it being considered at all.
# Can be useful to include comments. (Json has no comment syntax.)
'ignore': {
'ignore': True # This causes the entire dependency entry to be ignored. Useful for comments.
},
# Openhome dependencies generally have an associated git repo to allow us to
# fetch source code. They also have a different directory layout to accomodate
# the large number of versions created by CI builds.
#
# An openhome dependency, at minimum, must define:
# name
# version
#
# Commonly overridden:
# archive-suffix
# platform-specific
# configure-args
'openhome': {
'archive-extension': '.tar.gz',
'archive-prefix': '',
'archive-suffix': '',
'binary-repo': 'http://builds.openhome.org/releases/artifacts',
'archive-directory': '${binary-repo}/${name}/',
'archive-filename': '${archive-prefix}${name}-${version}-${archive-platform}${archive-suffix}${archive-extension}',
'remote-archive-path': '${archive-directory}${archive-filename}',
'use-local-archive': False,
'archive-path': '${use-local-archive?local-archive-path:remote-archive-path}',
'source-path': '${linn-git-user}@core.linn.co.uk:/home/git',
'repo-name': '${name}',
'source-git': '${source-path}/${repo-name}.git',
'tag': '${repo-name}_${version}',
'any-platform': 'AnyPlatform',
'platform-specific': True,
'host-platform': default_platform(),
'archive-platform': '${platform-specific?platform:any-platform}',
'dest': 'dependencies/${archive-platform}/',
'configure-args': []
},
# Internal dependencies are named and structured in a similar manner
# to those of type 'openhome', but are considered private, and held
# in a non-public location
#
# Must define, at minimum:
# name
# version
#
# Commonly overridden:
# archive-suffix
'internal': {
'binary-repo': 'http://core.linn.co.uk/~artifacts/artifacts',
'source-git': None,
'any-platform': 'AnyPlatform',
'platform-specific': True,
'archive-suffix': '',
'archive-filename': '${name}-${version}-${platform}${archive-suffix}.tar.gz',
'archive-platform': '${platform-specific?platform:any-platform}',
'archive-path': '${binary-repo}/${name}/${archive-filename}',
'host-platform': default_platform(),
'dest': 'dependencies/${archive-platform}/',
'configure-args': []
},
# External dependencies generally don't have a git repo, and even if they do,
# it won't conform to our conventions.
#
# An external dependency, at minimum, must define:
# name
# archive-filename
#
# Commonly overriden:
# platform-specific
# configure-args
'external': {
'binary-repo': 'http://builds.openhome.org/releases/artifacts',
'source-git': None,
'any-platform': 'AnyPlatform',
'platform-specific': True,
'archive-platform': '${platform-specific?platform:any-platform}',
'archive-path': '${binary-repo}/${archive-platform}/${archive-filename}',
'host-platform': default_platform(),
'dest': 'dependencies/${archive-platform}/',
'configure-args': []
},
}
AWS_BUCKET = {'private': 'linn-artifacts-private',
'public': 'linn-artifacts-public'}
AWS_URL = {'private': 's3-eu-west-1.amazonaws.com/linn-artifacts-private',
'public': 's3-eu-west-1.amazonaws.com/linn-artifacts-public'}
class FileFetcher(object):
def __init__(self):
pass
def fetch(self, path):
if path.startswith("file:") or path.startswith("smb:"):
return self.fetch_file_url(path)
elif path.startswith("s3:"):
return self.fetch_aws(path)
elif re.match("[^\W\d]{2,8}:", path):
urlpath = path
if DEPENDENCY_TYPES['internal']['binary-repo'] in path:
awspath = 's3://' + AWS_BUCKET['private'] + '/' + path.replace(DEPENDENCY_TYPES['internal']['binary-repo'] + '/', '')
urlpath = 'https://' + AWS_URL['private'] + '/' + path.replace(DEPENDENCY_TYPES['internal']['binary-repo'] + '/', '')
elif DEPENDENCY_TYPES['openhome']['binary-repo'] in path:
awspath = 's3://' + AWS_BUCKET['public'] + '/artifacts/' + path.replace(DEPENDENCY_TYPES['openhome']['binary-repo'] + '/', '')
urlpath = 'https://' + AWS_URL['public'] + '/artifacts/' + path.replace(DEPENDENCY_TYPES['openhome']['binary-repo'] + '/', '')
if ('awspath' in vars()):
rc = self.fetch_aws(awspath)
if rc:
return rc
return self.fetch_url(urlpath)
return self.fetch_local(path)
@staticmethod
def fetch_aws(awspath):
print(' from AWS %s' % awspath)
temppath = tempfile.mktemp( suffix='.tmp' )
try:
aws.copy(awspath, temppath)
return temppath
except:
return None
@staticmethod
def fetch_local(path):
print( ' from %s' % path)
return path
@staticmethod
def fetch_file_url(url):
print( ' from %s' % url)
smb = False
if url.startswith("smb://"):
url = url[6:]
smb = True
elif url.startswith("file://"):
url = url[7:]
path = urllib.url2pathname(url).replace(os.path.sep, "/")
if path[0] == '/':
if path[1] == '/':
# file:////hostname/path/file.ext
# Bad remote path.
remote = True
legacy = True
final_path = path.replace("/", os.path.sep)
else:
# file:///path/file.ext
# Good local path.
remote = False
legacy = False
if smb:
raise Exception("Bad smb:// path")
final_path = path[1:].replace("/", os.path.sep)
else:
if path[0].isalpha() and path[1] == ':':
# file:///x:/foo/bar/baz
# Good absolute local path.
remote = False
legacy = False
final_path = path.replace('/', os.path.sep)
else:
# file://hostname/path/file.ext
# Good remote path.
remote = True
legacy = False
final_path = "\\\\" + path.replace("/", os.path.sep)
if smb and (legacy or not remote):
raise Exception("Bad smb:// path. Use 'smb://hostname/path/to/file.ext'")
if (smb or remote) and not platform.platform().startswith("Windows"):
raise Exception("SMB file access not supported on non-Windows platforms.")
return final_path
@staticmethod
def fetch_url(url):
print(" from '%s'" % url)
handle, temppath = tempfile.mkstemp(suffix='.tmp')
remotefile = requests.get(url=url, headers={'Accept-Encoding': 'identity'})
localfile = os.fdopen(handle, 'wb')
if remotefile.status_code == 200:
localfile.write(remotefile.content)
localfile.close()
return temppath
class EnvironmentExpander(object):
# template_regex matches
template_regex = re.compile(r"""
(?x) # Enable whitespace and comments
(?P<dollar>\$\$)| # Match $$
(?P<word>\$[a-zA-Z_][a-zA-Z_0-9]*)| # Match $word
(?P<parens>\$\{[^}]*\}) # Match ${any-thing}
""")
# Matches foo[bar]
index_regex = re.compile(r"""
(?x) # Enable whitespace and comments
^ # Match only at start of string
([^][]*) # Match table name (no brackets allowed)
\[ # Match one open bracket: [
([^][]*) # Match key (no brackets allowed)
\] # Match one close bracket: ]
$
""")
def __init__(self, env_dict):
self.env_dict = env_dict
self.cache = {}
self.expandset = set()
def __getitem__(self, key):
return self.expand(key)
def getraw(self, key):
return self.env_dict[key]
def __contains__(self, key):
return key in self.env_dict
def keys(self):
return self.env_dict.keys()
def values(self):
return [self.expand(key) for key in self.keys()]
def items(self):
return [(key, self.expand(key)) for key in self.keys()]
def expand(self, key):
if key in self.cache:
return self.cache[key]
if key in self.expandset:
raise ValueError("Recursive expansion for key:", key)
self.expandset.add(key)
result = self._expand(key)
self.cache[key] = result
self.expandset.remove(key)
return result
def _expand(self, key):
if key not in self.env_dict:
raise KeyError("Key undefined:", key)
value = self.env_dict[key]
return self._expandvalue(value)
def _expandvalue(self, value):
if isinstance(value, ("".__class__, u"".__class__)):
return self.expandstring(value)
# return self.template_regex.sub(self.replacematch, value)
elif isinstance(value, (list, tuple)):
return [self._expandvalue(x) for x in value]
elif isinstance(value, dict):
return dict((k, self._expandvalue(v)) for (k, v) in value.items())
return value
def expandstring(self, value):
firstmatch = self.template_regex.match(value)
if firstmatch is not None and firstmatch.group(0) == value and value != "$$":
# Special case: The entire string is a single expansion. In this case,
# we allow the expansion to be *anything* (bool, int, list...),
# not just a string.
return self.replacematch(firstmatch)
return self.template_regex.sub(self.replacematch, value)
def replacematch(self, match):
if match.group('dollar'):
return '$'
key = None
if match.group('word'):
key = match.group('word')[1:]
if match.group('parens'):
key = match.group('parens')[2:-1]
assert key is not None
key = key.strip()
if '[' in key:
return self.expandlookup(key)
if '?' in key:
return self.expandconditional(key)
return self.expand(key)
def expandlookup(self, key):
match = self.index_regex.match(key)
if match is None:
raise ValueError('lookup must be of form ${table[key]}')
tablename = match.group(1).strip()
keyname = match.group(2).strip()
table = self.expand(tablename)
if keyname.startswith('$'):
key = self.expand(keyname[1:])
else:
key = keyname
if not isinstance(table, dict):
raise ValueError("lookup table must expand to a JSON object (got {0!r} instead)".format(table))
if not isinstance(key, ("".__class__, u"".__class__)):
raise ValueError("lookup index must expand to a JSON string (got {0!r} instead)".format(key))
if key not in table:
if '*' in table:
return table['*']
raise KeyError("Key not in table, and no default '*' entry found: key={0!r}\ntable={1!r}".format(key, table))
return table[key]
def expandconditional(self, key):
if '?' not in key:
raise ValueError('conditional must be of form ${condition?result:alternative}')
condition, rest = key.split('?', 1)
if ':' not in rest:
raise ValueError('conditional must be of form ${condition?result:alternative}')
primary, alternative = rest.split(':', 1)
condition, primary, alternative = [x.strip() for x in [condition, primary, alternative]]
try:
conditionvalue = self.expand(condition)
except KeyError:
conditionvalue = False
if self.is_trueish(conditionvalue):
return self.expand(primary)
return self.expand(alternative)
@staticmethod
def is_trueish(value):
if hasattr(value, "upper"):
value = value.upper()
return value in [1, "1", "YES", "Y", "TRUE", "ON", True]
class Dependency(object):
def __init__(self, name, environment, fetcher, has_overrides=False):
self.expander = EnvironmentExpander(environment)
self.has_overrides = has_overrides
self.fetcher = fetcher
def fetch(self):
remote_path = self.expander.expand('archive-path')
local_path = os.path.abspath(self.expander.expand('dest'))
fetched_path = None
print("\nFetching '%s'" % self.name)
try:
fetched_path = self.fetcher.fetch(remote_path)
statinfo = os.stat(fetched_path)
if not statinfo.st_size:
os.unlink(fetched_path)
print(" **** WARNING - failed to fetch %s ****" % os.path.basename(remote_path))
return False
except IOError:
print(" **** FAILED ****")
return False
try:
os.makedirs(local_path)
except OSError:
# We get an error if the directory exists, which we are happy to
# ignore. If something worse went wrong, we will find out very
# soon when we try to extract the files.
pass
print(" unpacking to '%s'" % (local_path,))
if os.path.splitext(remote_path)[1].upper() in ['.ZIP', '.NUPKG', '.JAR']:
self.unzip(fetched_path, local_path)
else:
self.untar(fetched_path, local_path)
if fetched_path:
if fetched_path != remote_path:
os.unlink(fetched_path)
print("OK")
return True
@property
def name(self):
return self['name']
def __getitem__(self, key):
return self.expander.expand(key)
def __contains__(self, key):
return key in self.expander
def items(self):
return self.expander.items()
def checkout(self):
name = self['name']
sourcegit = self['source-git']
if sourcegit is None:
print('No git repo defined for {0}'.format(name))
return False
print("Fetching source for '%s'\n into '%s'" % (name, os.path.abspath('../' + name)))
tag = self['tag']
try:
if not os.path.exists('../' + name):
print(' git clone {0} {1}'.format(sourcegit, name))
subprocess.check_call(['git', 'clone', sourcegit, name], cwd='..', shell=False)
elif not os.path.isdir('../' + name):
print('Cannot checkout {0}, because directory ../{0} already exists'.format(name))
return False
else:
print(' git fetch origin')
subprocess.check_call(['git', 'fetch', 'origin'], cwd='../' + name, shell=False)
print(" git checkout {0}".format(tag))
subprocess.check_call(['git', 'checkout', tag], cwd='../' + name, shell=False)
except subprocess.CalledProcessError as cpe:
print(str(cpe))
return False
return True
@staticmethod
def untar(source, dest):
tf = tarfile.open(source, 'r')
for f in tf:
try:
tf.extract(f.name, path=dest)
except IOError:
os.unlink( os.path.join(dest, f.name ))
tf.extract(f.name, path=dest)
tf.close()
@staticmethod
def unzip(source, dest):
zf = zipfile.ZipFile(source, mode='r')
zf.extractall(path=dest)
zf.close()
def expand_remote_path(self):
return self.expander.expand('archive-path')
def expand_local_path(self):
return self.expander.expand('dest')
def expand_configure_args(self):
return self.expander.expand('configure-args')
class DependencyCollection(object):
def __init__(self, env):
fetcher = FileFetcher()
self.base_env = env
self.dependency_types = DEPENDENCY_TYPES
self.dependencies = {}
self.fetcher = fetcher
def create_dependency(self, dependency_definition, overrides={}):
defn = dependency_definition
env = {}
env.update(self.base_env)
if 'type' in defn:
dep_type = defn['type']
env.update(self.dependency_types[dep_type])
else:
# default to an 'external' dependency type if none specified
dep_type = 'external'
env.update(self.dependency_types[dep_type])
env.update(defn)
env.update(overrides)
if 'name' not in env:
raise ValueError('Dependency definition contains no name')
name = env['name']
new_dependency = Dependency(name, env, self.fetcher, has_overrides=len(overrides) > 0)
if 'ignore' in new_dependency and new_dependency['ignore']:
return
self.dependencies[name] = new_dependency
def __contains__(self, key):
return key in self.dependencies
def __getitem__(self, key):
return self.dependencies[key]
def items(self):
return self.dependencies.items()
def _filter(self, subset=None):
if subset is None:
return self.dependencies.values()
missing_dependencies = [name for name in subset if name not in self.dependencies]
if len(missing_dependencies) > 0:
raise Exception("No entries in dependency file named: " + ", ".join(missing_dependencies) + ".")
return [self.dependencies[name] for name in subset]
def get_args(self, subset=None):
dependencies = self._filter(subset)
configure_args = sum((d.expand_configure_args() for d in dependencies), [])
return configure_args
def fetch(self, subset=None):
dependencies = self._filter(subset)
failed_dependencies = []
filename = self.fetched_deps_filename(dependencies)
fetched_deps = self.load_fetched_deps(filename)
for d in dependencies:
do_fetch = True
name = ''
path = ''
dest = ''
if 'name' in d.expander:
name = d.expander.expand('name')
if 'archive-path' in d.expander:
path = d.expander.expand('archive-path')
if 'dest' in d.expander:
dest = d.expander.expand('dest')
lookup = dest.rstrip( '/' ) + '/' + name
version = os.path.basename(path)
if lookup in fetched_deps:
if fetched_deps[lookup] == version:
print("Skipping fetch of %s as unchanged (%s)" % (name, version))
do_fetch = False
if do_fetch:
if not d.fetch():
failed_dependencies.append(d.name)
else:
fetched_deps[lookup] = version
if filename:
self.save_fetched_deps(filename, fetched_deps)
if failed_dependencies:
print("Failed to fetch some dependencies: " + ' '.join(failed_dependencies))
return False
return True
@staticmethod
def fetched_deps_filename(deps):
filename = None
for d in deps:
if 'dest' in d.expander:
filename = os.path.join(d.expander.expand('dest').split('/')[0], 'loadedDeps.json')
break
return filename
def load_fetched_deps(self, filename):
loaded_deps = {}
if filename and os.path.isfile(filename):
try:
f = open(filename, 'rt')
loaded_deps = json.load(f)
f.close()
except:
print("Error with current fetched dependency file: %s" % filename)
return loaded_deps
@staticmethod
def save_fetched_deps(filename, deps):
f = open(filename, 'wt')
json.dump(deps, f)
f.close()
def checkout(self, subset=None):
dependencies = self._filter(subset)
failed_dependencies = []
for d in dependencies:
if not d.checkout():
failed_dependencies.append(d.name)
if failed_dependencies:
print("Failed to check out some dependencies: " + ' '.join(failed_dependencies))
return False
return True
def read_json_dependencies(dependencyfile, overridefile, env):
collection = DependencyCollection(env)
dependencies = json.load(dependencyfile)
overrides = json.load(overridefile)
overrides_by_name = dict((dep['name'], dep) for dep in overrides)
for d in dependencies:
name = d['name']
override = overrides_by_name.get(name, {})
collection.create_dependency(d, override)
return collection
def read_json_dependencies_from_filename(dependencies_filename, overrides_filename, env):
try:
dependencyfile = open(dependencies_filename, "r")
with open(dependencies_filename) as dependencyfile:
if overrides_filename is not None and os.path.isfile(overrides_filename):
with open(overrides_filename) as overridesfile:
return read_json_dependencies(dependencyfile, overridesfile, env)
else:
return read_json_dependencies(dependencyfile, io.StringIO(u'[]'), env)
except (OSError, IOError) as e:
if e.errno != 2:
raise
return DependencyCollection(env)
def cli(args):
if platform.system() != "Windows":
args = ["mono", "--runtime=v4.0.30319"] + args
subprocess.check_call(args, shell=False)
def clean_dirs(dir):
"""Remove the specified directory tree - don't remove anything if it would fail"""
if os.path.isdir( dir ):
locked = []
for dirName, subdirList, fileList in os.walk(dir):
for fileName in fileList:
filePath = os.path.join(dirName, fileName)
try:
if not os.path.islink( filePath ):
openAtt = 'r'
if platform.system().lower() == 'windows':
openAtt = 'a'
f = open(filePath, openAtt)
f.close()
except:
locked.append(filePath)
if locked:
for f in locked:
print('Locked file:- ', f)
raise Exception('Failed to clean dependencies\n')
else:
shutil.rmtree(dir)
def fetch_dependencies(dependency_names=None, platform=None, env=None, fetch=True, clean=True, source=False, list_details=False, local_overrides=True, verbose=False):
'''
Fetch all the dependencies defined in projectdata/dependencies.json and in
projectdata/packages.config.
platform:
Name of target platform. E.g. 'Windows-x86', 'Linux-x64', 'Mac-x64'...
env:
Extra variables referenced by the dependencies file.
fetch:
True to fetch the listed dependencies, False to skip.
clean:
True to clean out directories before fetching, False to skip.
source:
True to fetch source for the listed dependencies, False to skip.
'''
if env is None:
env = {}
if platform is not None:
env['platform'] = None
fName = os.path.join(os.path.abspath(os.path.dirname(__file__)), 'platforms.txt')
f = open(fName, 'rt')
supported = f.readlines()
f.close()
for entry in supported:
if platform in entry:
env['platform'] = platform
if not env['platform']:
raise Exception('Platform not supported (%s) - see %s for list of supported platforms' % (platform, fName))
if 'platform' not in env:
platform = env['platform'] = default_platform()
if '-' in platform:
env['system'], env['architecture'] = platform.split('-', 2)
if platform is None:
raise Exception('Platform not specified and unable to guess.')
if clean and not list_details:
try:
os.unlink('dependencies/loadedDeps.json')
except:
pass
clean_dirs('dependencies')
overrides_filename = '../dependency_overrides.json' if local_overrides else None
dependencies = read_json_dependencies_from_filename('projectdata/dependencies.json', overrides_filename, env=env)
if list_details:
for name, dependency in dependencies.items():
print("Dependency '{0}':".format(name))
print(" fetches from: {0!r}".format(dependency['archive-path']))
print(" unpacks to: {0!r}".format(dependency['dest']))
print(" local override: {0}".format("YES (see '../dependency_overrides.json')" if dependency.has_overrides else 'no'))
if verbose:
print(" all keys:")
for key, value in sorted(dependency.items()):
print(" {0} = {1!r}".format(key, value))
print("")
else:
if fetch:
if not dependencies.fetch(dependency_names):
raise Exception("Failed to load requested dependencies")
if source:
dependencies.checkout(dependency_names)
# Finally perform cross-check of (major.minor) dependency versions to ensure that these are in sync
# across this (current) repo and all its pulled-in dependencies. Done as totally seperate operation
# to isolate from the main fetcher code to assist with any future maintenance
if not clean:
xcheck = deps_cross_checker.DepsCrossChecker( platform )
result = xcheck.execute()
if result != 0:
raise Exception( 'Failed: dependency cross-checker detected problem(s)' )
return dependencies