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# -*- python -*-
# -*- coding: utf-8 -*-
# This file is part of Installsystems.
#
# Installsystems is free software: you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Installsystems is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with Installsystems. If not, see <http://www.gnu.org/licenses/>.
'''
Package Image module
'''
from cStringIO import StringIO
from difflib import unified_diff
from installsystems import VERSION
from installsystems.exception import ISError
from installsystems.image.changelog import Changelog
from installsystems.image.image import Image
from installsystems.image.payload import Payload
from installsystems.image.source import SourceImage, DESCRIPTION_TPL
from installsystems.image.tarball import Tarball
from installsystems.printer import warn, arrow, arrowlevel, out, debug
from installsystems.tools import mkdir, abspath, time_rfc2822, human_size, argv, PipeFile
from json import loads, dumps
from math import floor
from os import listdir
from os.path import join, basename, exists, isdir, dirname
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from time import time
class PackageImage(Image):
'''
Packaged image manipulation class
'''
@classmethod
def diff(cls, pkg1, pkg2):
'''
Diff two packaged images
'''
arrow(u"Difference from images #y#%s v%s#R# to #r#%s v%s#R#:" % (pkg1.name,
pkg1.version,
pkg2.name,
pkg2.version))
# extract images for diff scripts files
fromfiles = set(pkg1._tarball.getnames(re_pattern="(parser|setup)/.*"))
tofiles = set(pkg2._tarball.getnames(re_pattern="(parser|setup)/.*"))
for f in fromfiles | tofiles:
# preparing from info
if f in fromfiles:
fromfile = join(pkg1.filename, f)
fromdata = pkg1._tarball.extractfile(f).readlines()
else:
fromfile = "/dev/null"
fromdata = ""
# preparing to info
if f in tofiles:
tofile = join(pkg2.filename, f)
todata = pkg2._tarball.extractfile(f).readlines()
else:
tofile = "/dev/null"
todata = ""
# generate diff
for line in unified_diff(fromdata,
todata,
fromfile=fromfile,
tofile=tofile):
# coloring diff
if line.startswith("+"):
out(u"#g#%s#R#" % line, endl="")
elif line.startswith("-"):
out(u"#r#%s#R#" % line, endl="")
elif line.startswith("@@"):
out(u"#c#%s#R#" % line, endl="")
else:
out(line, endl="")
def __init__(self, path, fileobj=None, md5name=False):
'''
Initialize a package image
fileobj must be a seekable fileobj
'''
Image.__init__(self)
self.path = abspath(path)
self.base_path = dirname(self.path)
# tarball are named by md5 and not by real name
self.md5name = md5name
try:
if fileobj is None:
fileobj = PipeFile(self.path, "r")
else:
fileobj = PipeFile(mode="r", fileobj=fileobj)
memfile = StringIO()
fileobj.consume(memfile)
# close source
fileobj.close()
# get downloaded size and md5
self.size = fileobj.read_size
self.md5 = fileobj.md5
memfile.seek(0)
self._tarball = Tarball.open(fileobj=memfile, mode='r:gz')
except Exception as e:
raise ISError(u"Unable to open image %s" % path, e)
self._metadata = self.read_metadata()
# print info
arrow(u"Image %s v%s loaded" % (self.name, self.version))
arrow(u"Author: %s" % self.author, 1)
arrow(u"Date: %s" % time_rfc2822(self.date), 1)
# build payloads info
self.payload = {}
for pname, pval in self._metadata["payload"].items():
pfilename = u"%s-%s%s" % (self.filename[:-len(Image.extension)],
pname, Payload.extension)
if self.md5name:
ppath = join(self.base_path,
self._metadata["payload"][pname]["md5"])
else:
ppath = join(self.base_path, pfilename)
self.payload[pname] = Payload(pname, pfilename, ppath, **pval)
def __getattr__(self, name):
'''
Give direct access to description field
'''
if name in self._metadata:
return self._metadata[name]
raise AttributeError
@property
def filename(self):
'''
Return image filename
'''
return u"%s-%s%s" % (self.name, self.version, self.extension)
def read_metadata(self):
'''
Parse tarball and return metadata dict
'''
desc = {}
# check format
img_format = self._tarball.get_utf8("format")
try:
if float(img_format) >= floor(float(SourceImage.format)) + 1.0:
raise Exception()
except:
raise ISError(u"Invalid image format %s" % img_format)
desc["format"] = img_format
# check description
try:
img_desc = self._tarball.get_utf8("description.json")
desc.update(loads(img_desc))
self.check_name(desc["name"])
self.check_version(desc["version"])
if "compressor" not in desc:
desc["compressor"] = "gzip = *"
else:
# format compressor pattern string
compressor_str = ""
for compressor, patterns in desc["compressor"]:
# if pattern is not empty
if patterns != ['']:
compressor_str += "%s = %s\n" % (compressor, ", ".join(patterns))
# remove extra endline
desc["compressor"] = compressor_str[:-1]
# add is_min_version if not present
if "is_min_version" not in desc:
desc["is_min_version"] = 0
# check installsystems min version
if self.compare_versions(VERSION, desc["is_min_version"]) < 0:
raise ISError("Minimum Installsystems version not satisfied "
"(%s)" % desc["is_min_version"])
except Exception as e:
raise ISError(u"Invalid description", e)
# try to load changelog
try:
img_changelog = self._tarball.get_utf8("changelog")
desc["changelog"] = Changelog(img_changelog)
except KeyError:
desc["changelog"] = Changelog("")
except Exception as e:
warn(u"Invalid changelog: %s" % e)
return desc
def show(self, o_payloads=False, o_files=False, o_changelog=False, o_json=False):
'''
Display image content
'''
if o_json:
out(dumps(self._metadata))
else:
out(u'#light##yellow#Name:#reset# %s' % self.name)
out(u'#light##yellow#Version:#reset# %s' % self.version)
out(u'#yellow#Date:#reset# %s' % time_rfc2822(self.date))
out(u'#yellow#Description:#reset# %s' % self.description)
out(u'#yellow#Author:#reset# %s' % self.author)
# field is_build_version is new in version 5. I can be absent.
try: out(u'#yellow#IS build version:#reset# %s' % self.is_build_version)
except AttributeError: pass
# field is_min_version is new in version 5. I can be absent.
try: out(u'#yellow#IS minimum version:#reset# %s' % self.is_min_version)
except AttributeError: pass
out(u'#yellow#Format:#reset# %s' % self.format)
out(u'#yellow#MD5:#reset# %s' % self.md5)
out(u'#yellow#Payload count:#reset# %s' % len(self.payload))
# display payloads
if o_payloads:
payloads = self.payload
for payload_name in payloads:
payload = payloads[payload_name]
out(u'#light##yellow#Payload:#reset# %s' % payload_name)
out(u' #yellow#Date:#reset# %s' % time_rfc2822(payload.mtime))
out(u' #yellow#Size:#reset# %s' % (human_size(payload.size)))
out(u' #yellow#MD5:#reset# %s' % payload.md5)
# display image content
if o_files:
out('#light##yellow#Files:#reset#')
self._tarball.list(True)
# display changelog
if o_changelog:
out('#light##yellow#Changelog:#reset#')
self.changelog.show(self.version)
def check(self, message="Check MD5"):
'''
Check md5 and size of tarballs are correct
Download tarball from path and compare the loaded md5 and remote
'''
arrow(message)
arrowlevel(1)
# check image
fo = PipeFile(self.path, "r")
fo.consume()
fo.close()
if self.size != fo.read_size:
raise ISError(u"Invalid size of image %s" % self.name)
if self.md5 != fo.md5:
raise ISError(u"Invalid MD5 of image %s" % self.name)
# check payloads
for pay_name, pay_obj in self.payload.items():
arrow(pay_name)
pay_obj.check()
arrowlevel(-1)
def cat(self, filename):
'''
Display filename in the tarball
'''
filelist = self._tarball.getnames(glob_pattern=filename, dir=False)
if len(filelist) == 0:
warn(u"No file matching %s" % filename)
for filename in filelist:
arrow(filename)
out(self._tarball.get_utf8(filename))
def download(self, directory, force=False, image=True, payload=False):
'''
Download image in directory
Doesn't use in memory image because we cannot access it
This is done to don't parasitize self._tarfile access to memfile
'''
# check if destination exists
directory = abspath(directory)
if image:
dest = join(directory, self.filename)
if not force and exists(dest):
raise ISError(u"Image destination already exists: %s" % dest)
# some display
arrow(u"Downloading image in %s" % directory)
debug(u"Downloading %s from %s" % (self.filename, self.path))
# open source
fs = PipeFile(self.path, progressbar=True)
# check if announced file size is good
if fs.size is not None and self.size != fs.size:
raise ISError(u"Downloading image %s failed: Invalid announced size" % self.name)
# open destination
fd = open(self.filename, "wb")
fs.consume(fd)
fs.close()
fd.close()
if self.size != fs.consumed_size:
raise ISError(u"Download image %s failed: Invalid size" % self.name)
if self.md5 != fs.md5:
raise ISError(u"Download image %s failed: Invalid MD5" % self.name)
if payload:
for payname in self.payload:
arrow(u"Downloading payload %s in %s" % (payname, directory))
self.payload[payname].info
self.payload[payname].download(directory, force=force)
def extract(self, directory, force=False, payload=False, gendescription=False):
'''
Extract content of the image inside a repository
'''
# check validity of dest
if exists(directory):
if not isdir(directory):
raise ISError(u"Destination %s is not a directory" % directory)
if not force and len(listdir(directory)) > 0:
raise ISError(u"Directory %s is not empty (need force)" % directory)
else:
mkdir(directory)
# extract content
arrow(u"Extracting image in %s" % directory)
self._tarball.extractall(directory)
# generate description file from description.json
if gendescription:
arrow(u"Generating description file in %s" % directory)
with open(join(directory, "description"), "w") as f:
f.write((DESCRIPTION_TPL % self._metadata).encode("UTF-8"))
# launch payload extraction
if payload:
for payname in self.payload:
# here we need to decode payname which is in unicode to escape
# tarfile to encode filename of file inside tarball inside unicode
dest = join(directory, "payload", payname.encode("UTF-8"))
arrow(u"Extracting payload %s in %s" % (payname, dest))
self.payload[payname].extract(dest, force=force)
def run(self, parser, extparser, load_modules=True, run_parser=True,
run_setup=True):
'''
Run images scripts
parser is the whole command line parser
extparser is the parser extensible by parser scripts
if load_modules is true load image modules
if run_parser is true run parser scripts
if run_setup is true run setup scripts
'''
# register start time
t0 = time()
# load image modules
if load_modules:
self.load_modules(lambda: self.select_scripts("lib"))
# run parser scripts to extend extparser
# those scripts should only extend the parser or produce error
if run_parser:
self.run_scripts("parser",
lambda: self.select_scripts("parser"),
"/",
{"parser": extparser})
# call parser (again), with full options
arrow("Parsing command line")
# encode command line arguments to utf-8
args = argv()[1:]
# catch exception in custom argparse action
try:
args = parser.parse_args(args=args)
except Exception as e:
raise ISError("Argument parser", e)
# run setup scripts
if run_setup:
self.run_scripts("setup",
lambda: self.select_scripts("setup"),
"/",
{"namespace": args})
# return the building time
return int(time() - t0)
def select_scripts(self, directory):
'''
Generator of tuples (fp,fn,fc) of scripts witch are allocatable
in a tarball directory
'''
for fp in sorted(self._tarball.getnames(re_pattern="%s/.*\.py" % directory)):
fn = basename(fp)
# extract source code
try:
fc = self._tarball.get_str(fp)
except Exception as e:
raise ISError(u"Unable to extract script %s" % fp, e)
# yield complet file path, file name and file content
yield (fp, fn, fc)