701 lines
21 KiB
Python
701 lines
21 KiB
Python
"""Package Install Manager for Python.
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This is currently a MacOSX-only strawman implementation.
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Motto: "He may be shabby, but he gets you what you need" :-)
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Tools to allow easy installation of packages. The idea is that there is
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an online XML database per (platform, python-version) containing packages
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known to work with that combination. This module contains tools for getting
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and parsing the database, testing whether packages are installed, computing
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dependencies and installing packages.
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There is a minimal main program that works as a command line tool, but the
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intention is that the end user will use this through a GUI.
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"""
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import sys
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import os
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import urllib
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import urlparse
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import plistlib
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import distutils.util
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import distutils.sysconfig
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import md5
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__all__ = ["PimpPreferences", "PimpDatabase", "PimpPackage", "main"]
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_scriptExc_NotInstalled = "pimp._scriptExc_NotInstalled"
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_scriptExc_OldInstalled = "pimp._scriptExc_OldInstalled"
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_scriptExc_BadInstalled = "pimp._scriptExc_BadInstalled"
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NO_EXECUTE=0
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PIMP_VERSION="0.1"
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DEFAULT_FLAVORORDER=['source', 'binary']
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DEFAULT_DOWNLOADDIR='/tmp'
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DEFAULT_BUILDDIR='/tmp'
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DEFAULT_INSTALLDIR=distutils.sysconfig.get_python_lib()
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DEFAULT_PIMPDATABASE="http://www.cwi.nl/~jack/pimp/pimp-%s.plist" % distutils.util.get_platform()
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ARCHIVE_FORMATS = [
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(".tar.Z", "zcat \"%s\" | tar xf -"),
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(".taz", "zcat \"%s\" | tar xf -"),
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(".tar.gz", "zcat \"%s\" | tar xf -"),
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(".tgz", "zcat \"%s\" | tar xf -"),
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(".tar.bz", "bzcat \"%s\" | tar xf -"),
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]
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class MyURLopener(urllib.FancyURLopener):
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"""Like FancyURLOpener, but we do want to get errors as exceptions."""
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def http_error_default(self, url, fp, errcode, errmsg, headers):
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urllib.URLopener.http_error_default(self, url, fp, errcode, errmsg, headers)
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class PimpPreferences:
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"""Container for per-user preferences, such as the database to use
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and where to install packages."""
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def __init__(self,
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flavorOrder=None,
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downloadDir=None,
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buildDir=None,
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installDir=None,
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pimpDatabase=None):
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if not flavorOrder:
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flavorOrder = DEFAULT_FLAVORORDER
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if not downloadDir:
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downloadDir = DEFAULT_DOWNLOADDIR
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if not buildDir:
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buildDir = DEFAULT_BUILDDIR
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if not installDir:
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installDir = DEFAULT_INSTALLDIR
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if not pimpDatabase:
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pimpDatabase = DEFAULT_PIMPDATABASE
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self.flavorOrder = flavorOrder
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self.downloadDir = downloadDir
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self.buildDir = buildDir
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self.installDir = installDir
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self.pimpDatabase = pimpDatabase
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def check(self):
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"""Check that the preferences make sense: directories exist and are
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writable, the install directory is on sys.path, etc."""
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rv = ""
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RWX_OK = os.R_OK|os.W_OK|os.X_OK
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if not os.path.exists(self.downloadDir):
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rv += "Warning: Download directory \"%s\" does not exist\n" % self.downloadDir
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elif not os.access(self.downloadDir, RWX_OK):
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rv += "Warning: Download directory \"%s\" is not writable or not readable\n" % self.downloadDir
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if not os.path.exists(self.buildDir):
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rv += "Warning: Build directory \"%s\" does not exist\n" % self.buildDir
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elif not os.access(self.buildDir, RWX_OK):
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rv += "Warning: Build directory \"%s\" is not writable or not readable\n" % self.buildDir
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if not os.path.exists(self.installDir):
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rv += "Warning: Install directory \"%s\" does not exist\n" % self.installDir
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elif not os.access(self.installDir, RWX_OK):
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rv += "Warning: Install directory \"%s\" is not writable or not readable\n" % self.installDir
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else:
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installDir = os.path.realpath(self.installDir)
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for p in sys.path:
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try:
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realpath = os.path.realpath(p)
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except:
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pass
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if installDir == realpath:
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break
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else:
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rv += "Warning: Install directory \"%s\" is not on sys.path\n" % self.installDir
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return rv
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def compareFlavors(self, left, right):
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"""Compare two flavor strings. This is part of your preferences
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because whether the user prefers installing from source or binary is."""
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if left in self.flavorOrder:
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if right in self.flavorOrder:
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return cmp(self.flavorOrder.index(left), self.flavorOrder.index(right))
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return -1
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if right in self.flavorOrder:
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return 1
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return cmp(left, right)
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class PimpDatabase:
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"""Class representing a pimp database. It can actually contain
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information from multiple databases through inclusion, but the
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toplevel database is considered the master, as its maintainer is
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"responsible" for the contents."""
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def __init__(self, prefs):
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self._packages = []
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self.preferences = prefs
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self._urllist = []
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self._version = ""
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self._maintainer = ""
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self._description = ""
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def appendURL(self, url, included=0):
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"""Append packages from the database with the given URL.
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Only the first database should specify included=0, so the
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global information (maintainer, description) get stored."""
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if url in self._urllist:
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return
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self._urllist.append(url)
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fp = MyURLopener().open(url).fp
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dict = plistlib.Plist.fromFile(fp)
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# Test here for Pimp version, etc
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if not included:
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self._version = dict.get('Version', '0.1')
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if self._version != PIMP_VERSION:
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sys.stderr.write("Warning: database version %s does not match %s\n"
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% (self._version, PIMP_VERSION))
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self._maintainer = dict.get('Maintainer', '')
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self._description = dict.get('Description', '')
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self._appendPackages(dict['Packages'])
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others = dict.get('Include', [])
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for url in others:
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self.appendURL(url, included=1)
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def _appendPackages(self, packages):
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"""Given a list of dictionaries containing package
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descriptions create the PimpPackage objects and append them
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to our internal storage."""
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for p in packages:
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pkg = PimpPackage(self, dict(p))
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self._packages.append(pkg)
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def list(self):
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"""Return a list of all PimpPackage objects in the database."""
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return self._packages
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def listnames(self):
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"""Return a list of names of all packages in the database."""
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rv = []
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for pkg in self._packages:
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rv.append(pkg.fullname())
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return rv
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def dump(self, pathOrFile):
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"""Dump the contents of the database to an XML .plist file.
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The file can be passed as either a file object or a pathname.
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All data, including included databases, is dumped."""
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packages = []
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for pkg in self._packages:
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packages.append(pkg.dump())
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dict = {
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'Version': self._version,
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'Maintainer': self._maintainer,
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'Description': self._description,
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'Packages': packages
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}
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plist = plistlib.Plist(**dict)
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plist.write(pathOrFile)
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def find(self, ident):
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"""Find a package. The package can be specified by name
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or as a dictionary with name, version and flavor entries.
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Only name is obligatory. If there are multiple matches the
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best one (higher version number, flavors ordered according to
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users' preference) is returned."""
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if type(ident) == str:
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# Remove ( and ) for pseudo-packages
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if ident[0] == '(' and ident[-1] == ')':
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ident = ident[1:-1]
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# Split into name-version-flavor
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fields = ident.split('-')
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if len(fields) < 1 or len(fields) > 3:
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return None
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name = fields[0]
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if len(fields) > 1:
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version = fields[1]
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else:
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version = None
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if len(fields) > 2:
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flavor = fields[2]
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else:
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flavor = None
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else:
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name = ident['Name']
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version = ident.get('Version')
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flavor = ident.get('Flavor')
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found = None
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for p in self._packages:
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if name == p.name() and \
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(not version or version == p.version()) and \
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(not flavor or flavor == p.flavor()):
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if not found or found < p:
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found = p
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return found
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ALLOWED_KEYS = [
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"Name",
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"Version",
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"Flavor",
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"Description",
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"Home-page",
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"Download-URL",
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"Install-test",
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"Install-command",
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"Pre-install-command",
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"Post-install-command",
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"Prerequisites",
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"MD5Sum"
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]
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class PimpPackage:
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"""Class representing a single package."""
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def __init__(self, db, dict):
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self._db = db
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name = dict["Name"]
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for k in dict.keys():
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if not k in ALLOWED_KEYS:
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sys.stderr.write("Warning: %s: unknown key %s\n" % (name, k))
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self._dict = dict
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def __getitem__(self, key):
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return self._dict[key]
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def name(self): return self._dict['Name']
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def version(self): return self._dict['Version']
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def flavor(self): return self._dict['Flavor']
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def description(self): return self._dict['Description']
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def homepage(self): return self._dict['Home-page']
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def downloadURL(self): return self._dict['Download-URL']
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def fullname(self):
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"""Return the full name "name-version-flavor" of a package.
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If the package is a pseudo-package, something that cannot be
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installed through pimp, return the name in (parentheses)."""
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rv = self._dict['Name']
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if self._dict.has_key('Version'):
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rv = rv + '-%s' % self._dict['Version']
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if self._dict.has_key('Flavor'):
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rv = rv + '-%s' % self._dict['Flavor']
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if not self._dict.get('Download-URL'):
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# Pseudo-package, show in parentheses
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rv = '(%s)' % rv
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return rv
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def dump(self):
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"""Return a dict object containing the information on the package."""
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return self._dict
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def __cmp__(self, other):
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"""Compare two packages, where the "better" package sorts lower."""
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if not isinstance(other, PimpPackage):
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return cmp(id(self), id(other))
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if self.name() != other.name():
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return cmp(self.name(), other.name())
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if self.version() != other.version():
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return -cmp(self.version(), other.version())
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return self._db.preferences.compareFlavors(self.flavor(), other.flavor())
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def installed(self):
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"""Test wheter the package is installed.
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Returns two values: a status indicator which is one of
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"yes", "no", "old" (an older version is installed) or "bad"
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(something went wrong during the install test) and a human
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readable string which may contain more details."""
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namespace = {
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"NotInstalled": _scriptExc_NotInstalled,
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"OldInstalled": _scriptExc_OldInstalled,
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"BadInstalled": _scriptExc_BadInstalled,
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"os": os,
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"sys": sys,
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}
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installTest = self._dict['Install-test'].strip() + '\n'
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try:
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exec installTest in namespace
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except ImportError, arg:
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return "no", str(arg)
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except _scriptExc_NotInstalled, arg:
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return "no", str(arg)
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except _scriptExc_OldInstalled, arg:
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return "old", str(arg)
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except _scriptExc_BadInstalled, arg:
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return "bad", str(arg)
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except:
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return "bad", "Package install test got exception"
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return "yes", ""
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def prerequisites(self):
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"""Return a list of prerequisites for this package.
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The list contains 2-tuples, of which the first item is either
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a PimpPackage object or None, and the second is a descriptive
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string. The first item can be None if this package depends on
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something that isn't pimp-installable, in which case the descriptive
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string should tell the user what to do."""
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rv = []
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if not self._dict.get('Download-URL'):
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return [(None, "This package needs to be installed manually")]
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if not self._dict['Prerequisites']:
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return []
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for item in self._dict['Prerequisites']:
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if type(item) == str:
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pkg = None
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descr = str(item)
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else:
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name = item['Name']
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if item.has_key('Version'):
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name = name + '-' + item['Version']
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if item.has_key('Flavor'):
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name = name + '-' + item['Flavor']
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pkg = self._db.find(name)
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if not pkg:
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descr = "Requires unknown %s"%name
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else:
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descr = pkg.description()
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rv.append((pkg, descr))
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return rv
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def _cmd(self, output, dir, *cmditems):
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"""Internal routine to run a shell command in a given directory."""
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cmd = ("cd \"%s\"; " % dir) + " ".join(cmditems)
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if output:
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output.write("+ %s\n" % cmd)
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if NO_EXECUTE:
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return 0
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dummy, fp = os.popen4(cmd, "r")
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dummy.close()
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while 1:
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line = fp.readline()
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if not line:
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break
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if output:
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output.write(line)
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rv = fp.close()
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return rv
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def downloadSinglePackage(self, output=None):
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"""Download a single package, if needed.
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An MD5 signature is used to determine whether download is needed,
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and to test that we actually downloaded what we expected.
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If output is given it is a file-like object that will receive a log
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of what happens.
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If anything unforeseen happened the method returns an error message
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string.
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"""
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scheme, loc, path, query, frag = urlparse.urlsplit(self._dict['Download-URL'])
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path = urllib.url2pathname(path)
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filename = os.path.split(path)[1]
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self.archiveFilename = os.path.join(self._db.preferences.downloadDir, filename)
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if not self._archiveOK():
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if scheme == 'manual':
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return "Please download package manually and save as %s" % self.archiveFilename
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if self._cmd(output, self._db.preferences.downloadDir,
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"curl",
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"--output", self.archiveFilename,
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self._dict['Download-URL']):
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return "download command failed"
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if not os.path.exists(self.archiveFilename) and not NO_EXECUTE:
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return "archive not found after download"
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if not self._archiveOK():
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return "archive does not have correct MD5 checksum"
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def _archiveOK(self):
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"""Test an archive. It should exist and the MD5 checksum should be correct."""
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if not os.path.exists(self.archiveFilename):
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return 0
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if not self._dict.get('MD5Sum'):
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sys.stderr.write("Warning: no MD5Sum for %s\n" % self.fullname())
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return 1
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data = open(self.archiveFilename, 'rb').read()
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checksum = md5.new(data).hexdigest()
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return checksum == self._dict['MD5Sum']
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def unpackSinglePackage(self, output=None):
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"""Unpack a downloaded package archive."""
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filename = os.path.split(self.archiveFilename)[1]
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for ext, cmd in ARCHIVE_FORMATS:
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if filename[-len(ext):] == ext:
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break
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else:
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return "unknown extension for archive file: %s" % filename
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basename = filename[:-len(ext)]
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cmd = cmd % self.archiveFilename
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self._buildDirname = os.path.join(self._db.preferences.buildDir, basename)
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if self._cmd(output, self._db.preferences.buildDir, cmd):
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return "unpack command failed"
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setupname = os.path.join(self._buildDirname, "setup.py")
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if not os.path.exists(setupname) and not NO_EXECUTE:
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return "no setup.py found after unpack of archive"
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def installSinglePackage(self, output=None):
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"""Download, unpack and install a single package.
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If output is given it should be a file-like object and it
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will receive a log of what happened."""
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if not self._dict['Download-URL']:
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return "%s: This package needs to be installed manually" % _fmtpackagename(self)
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msg = self.downloadSinglePackage(output)
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if msg:
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return "download %s: %s" % (self.fullname(), msg)
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msg = self.unpackSinglePackage(output)
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if msg:
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return "unpack %s: %s" % (self.fullname(), msg)
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if self._dict.has_key('Pre-install-command'):
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if self._cmd(output, self._buildDirname, self._dict['Pre-install-command']):
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return "pre-install %s: running \"%s\" failed" % \
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(self.fullname(), self._dict['Pre-install-command'])
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old_contents = os.listdir(self._db.preferences.installDir)
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installcmd = self._dict.get('Install-command')
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if not installcmd:
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installcmd = '"%s" setup.py install' % sys.executable
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if self._cmd(output, self._buildDirname, installcmd):
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return "install %s: running \"%s\" failed" % self.fullname()
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new_contents = os.listdir(self._db.preferences.installDir)
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self._interpretPthFiles(old_contents, new_contents)
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if self._dict.has_key('Post-install-command'):
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if self._cmd(output, self._buildDirname, self._dict['Post-install-command']):
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return "post-install %s: running \"%s\" failed" % \
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(self.fullname(), self._dict['Post-install-command'])
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return None
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def _interpretPthFiles(self, old_contents, new_contents):
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"""Evaluate any new .pth files that have appeared after installing"""
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for fn in new_contents:
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if fn in old_contents:
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continue
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if fn[-4:] != '.pth':
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continue
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fullname = os.path.join(self._db.preferences.installDir, fn)
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f = open(fullname)
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for line in f.readlines():
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if not line:
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continue
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if line[0] == '#':
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continue
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if line[:6] == 'import':
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exec line
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continue
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if line[-1] == '\n':
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line = line[:-1]
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if not os.path.isabs(line):
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line = os.path.join(self._db.preferences.installDir, line)
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line = os.path.realpath(line)
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if not line in sys.path:
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sys.path.append(line)
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class PimpInstaller:
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"""Installer engine: computes dependencies and installs
|
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packages in the right order."""
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def __init__(self, db):
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self._todo = []
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self._db = db
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self._curtodo = []
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self._curmessages = []
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def __contains__(self, package):
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return package in self._todo
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def _addPackages(self, packages):
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for package in packages:
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if not package in self._todo:
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self._todo.insert(0, package)
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def _prepareInstall(self, package, force=0, recursive=1):
|
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"""Internal routine, recursive engine for prepareInstall.
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|
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Test whether the package is installed and (if not installed
|
|
or if force==1) prepend it to the temporary todo list and
|
|
call ourselves recursively on all prerequisites."""
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|
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if not force:
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status, message = package.installed()
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if status == "yes":
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return
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if package in self._todo or package in self._curtodo:
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return
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self._curtodo.insert(0, package)
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if not recursive:
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return
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prereqs = package.prerequisites()
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for pkg, descr in prereqs:
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if pkg:
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self._prepareInstall(pkg, force, recursive)
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else:
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self._curmessages.append("Requires: %s" % descr)
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|
|
|
def prepareInstall(self, package, force=0, recursive=1):
|
|
"""Prepare installation of a package.
|
|
|
|
If the package is already installed and force is false nothing
|
|
is done. If recursive is true prerequisites are installed first.
|
|
|
|
Returns a list of packages (to be passed to install) and a list
|
|
of messages of any problems encountered.
|
|
"""
|
|
|
|
self._curtodo = []
|
|
self._curmessages = []
|
|
self._prepareInstall(package, force, recursive)
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rv = self._curtodo, self._curmessages
|
|
self._curtodo = []
|
|
self._curmessages = []
|
|
return rv
|
|
|
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def install(self, packages, output):
|
|
"""Install a list of packages."""
|
|
|
|
self._addPackages(packages)
|
|
status = []
|
|
for pkg in self._todo:
|
|
msg = pkg.installSinglePackage(output)
|
|
if msg:
|
|
status.append(msg)
|
|
return status
|
|
|
|
|
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|
|
def _run(mode, verbose, force, args):
|
|
"""Engine for the main program"""
|
|
|
|
prefs = PimpPreferences()
|
|
prefs.check()
|
|
db = PimpDatabase(prefs)
|
|
db.appendURL(prefs.pimpDatabase)
|
|
|
|
if mode == 'dump':
|
|
db.dump(sys.stdout)
|
|
elif mode =='list':
|
|
if not args:
|
|
args = db.listnames()
|
|
print "%-20.20s\t%s" % ("Package", "Description")
|
|
print
|
|
for pkgname in args:
|
|
pkg = db.find(pkgname)
|
|
if pkg:
|
|
description = pkg.description()
|
|
pkgname = pkg.fullname()
|
|
else:
|
|
description = 'Error: no such package'
|
|
print "%-20.20s\t%s" % (pkgname, description)
|
|
if verbose:
|
|
print "\tHome page:\t", pkg.homepage()
|
|
print "\tDownload URL:\t", pkg.downloadURL()
|
|
elif mode =='status':
|
|
if not args:
|
|
args = db.listnames()
|
|
print "%-20.20s\t%s\t%s" % ("Package", "Installed", "Message")
|
|
print
|
|
for pkgname in args:
|
|
pkg = db.find(pkgname)
|
|
if pkg:
|
|
status, msg = pkg.installed()
|
|
pkgname = pkg.fullname()
|
|
else:
|
|
status = 'error'
|
|
msg = 'No such package'
|
|
print "%-20.20s\t%-9.9s\t%s" % (pkgname, status, msg)
|
|
if verbose and status == "no":
|
|
prereq = pkg.prerequisites()
|
|
for pkg, msg in prereq:
|
|
if not pkg:
|
|
pkg = ''
|
|
else:
|
|
pkg = pkg.fullname()
|
|
print "%-20.20s\tRequirement: %s %s" % ("", pkg, msg)
|
|
elif mode == 'install':
|
|
if not args:
|
|
print 'Please specify packages to install'
|
|
sys.exit(1)
|
|
inst = PimpInstaller(db)
|
|
for pkgname in args:
|
|
pkg = db.find(pkgname)
|
|
if not pkg:
|
|
print '%s: No such package' % pkgname
|
|
continue
|
|
list, messages = inst.prepareInstall(pkg, force)
|
|
if messages and not force:
|
|
print "%s: Not installed:" % pkgname
|
|
for m in messages:
|
|
print "\t", m
|
|
else:
|
|
if verbose:
|
|
output = sys.stdout
|
|
else:
|
|
output = None
|
|
messages = inst.install(list, output)
|
|
if messages:
|
|
print "%s: Not installed:" % pkgname
|
|
for m in messages:
|
|
print "\t", m
|
|
|
|
def main():
|
|
"""Minimal commandline tool to drive pimp."""
|
|
|
|
import getopt
|
|
def _help():
|
|
print "Usage: pimp [-v] -s [package ...] List installed status"
|
|
print " pimp [-v] -l [package ...] Show package information"
|
|
print " pimp [-vf] -i package ... Install packages"
|
|
print " pimp -d Dump database to stdout"
|
|
print "Options:"
|
|
print " -v Verbose"
|
|
print " -f Force installation"
|
|
sys.exit(1)
|
|
|
|
try:
|
|
opts, args = getopt.getopt(sys.argv[1:], "slifvd")
|
|
except getopt.Error:
|
|
_help()
|
|
if not opts and not args:
|
|
_help()
|
|
mode = None
|
|
force = 0
|
|
verbose = 0
|
|
for o, a in opts:
|
|
if o == '-s':
|
|
if mode:
|
|
_help()
|
|
mode = 'status'
|
|
if o == '-l':
|
|
if mode:
|
|
_help()
|
|
mode = 'list'
|
|
if o == '-d':
|
|
if mode:
|
|
_help()
|
|
mode = 'dump'
|
|
if o == '-i':
|
|
mode = 'install'
|
|
if o == '-f':
|
|
force = 1
|
|
if o == '-v':
|
|
verbose = 1
|
|
if not mode:
|
|
_help()
|
|
_run(mode, verbose, force, args)
|
|
|
|
if __name__ == '__main__':
|
|
main()
|
|
|
|
|