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e7b33db22d
applicable, and use a similar naming scheme for other fields. This has drastically changed the structure, as the PEP241 names aren't identifiers.
665 lines
No EOL
20 KiB
Python
665 lines
No EOL
20 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 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=os.path.join(sys.prefix, "Lib", "site-packages")
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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['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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fp = os.popen(cmd, "r")
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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['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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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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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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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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Test whether the package is installed and (if not installed
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or if force==1) prepend it to the temporary todo list and
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call ourselves recursively on all prerequisites."""
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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:
|
|
return
|
|
self._curtodo.insert(0, package)
|
|
if not recursive:
|
|
return
|
|
prereqs = package.prerequisites()
|
|
for pkg, descr in prereqs:
|
|
if pkg:
|
|
self._prepareInstall(pkg, force, recursive)
|
|
else:
|
|
self._curmessages.append("Requires: %s" % descr)
|
|
|
|
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)
|
|
rv = self._curtodo, self._curmessages
|
|
self._curtodo = []
|
|
self._curmessages = []
|
|
return rv
|
|
|
|
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
|
|
|
|
|
|
|
|
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()
|
|
|
|
|