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Webware / install.py

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#!/usr/bin/env python

"""install.py

Webware for Python installer

FUTURE

  * Look for an install.py in each component directory and run it
    (there's not a strong need right now).
  * Use distutils or setuptools instead of our own plugin concept.

"""


import os
import sys
from glob import glob
from operator import itemgetter

from MiscUtils import StringIO
from MiscUtils.PropertiesObject import PropertiesObject


class OutputCatcher(object):
    """Auxiliary class for logging output."""

    def __init__(self, output, log):
        self._output = output
        self._log = log

    def write(self, stuff):
        if stuff:
            self._output.write(stuff)
            self._output.flush()
            self._log.append(stuff)


class Installer(object):
    """Install Webware.

    The _comps attribute is a list of components,
    each of which is an instance of MiscUtils.PropertiesObject.

    """


    ## Init ##

    def __init__(self):
        self._props = PropertiesObject('Properties.py')
        self._props['dirname'] = '.'
        self._comps = []
        self._htHeader, self._htFooter = self.htHeaderAndFooter()
        from DocSupport.pytp import PyTP
        self._pytp = PyTP()
        from DocSupport.autotoc import AutoToC
        self._autotoc = AutoToC()


    ## Debug printing facility ##

    def _nop (self, msg):
        pass

    def _printMsg (self, msg):
        print '  ' + msg


    ## Running the installation ##

    def run(self, verbose=False,
            passprompt=True, defaultpass='', keepdocs=False):
        self._verbose = verbose
        self.printMsg = verbose and self._printMsg or self._nop
        log = []
        stdout, stderr = sys.stdout, sys.stderr
        try:
            sys.stdout = OutputCatcher(sys.stdout, log)
            sys.stderr = OutputCatcher(sys.stderr, log)
            self.printHello()
            self.clearLogFile()
            if not self.checkPyVersion() or not self.checkThreading():
                return
            self.detectComponents()
            self.installDocs(keepdocs)
            self.backupConfigs()
            self.copyStartScript()
            self.compileModules()
            self.fixPermissions()
            self.setupWebKitPassword(passprompt, defaultpass)
            self.printGoodbye()
            self.writeLogFile(log)
        finally:
            sys.stdout, sys.stderr = stdout, stderr

    def clearLogFile(self):
        """Remove the install.log file.

        This file with the logged output will get created at the
        very end of the installation, provided there are no errors.
        """
        if os.path.exists('install.log'):
            print
            print 'Removing log from last installation...'
            os.remove('install.log')

    def printHello(self):
        from time import time, localtime, asctime
        print
        print '%(name)s %(versionString)s' % self._props
        print 'Installer'
        print
        self.printKeyValue('Cur Date', asctime(localtime(time())))
        self.printKeyValue('Python', sys.version.replace(') [', ')\n['))
        self.printKeyValue('Op Sys', os.name)
        self.printKeyValue('Platform', sys.platform)
        self.printKeyValue('Cur Dir', os.getcwd())

    def checkPyVersion(self, minver=(2, 4)):
        """Check for minimum required Python version."""
        try:
            ver = sys.version_info[:len(minver)]
        except AttributeError:
            ver = (1,)
        if ver < minver:
            print ('This Release of Webware requires Python %s.\n'
                'Your currently used version is Python %s.\n'
                'You can download a newer version at: http://www.python.org\n'
                % ('.'.join(map(str, minver)), '.'.join(map(str, ver))))
            response = raw_input('You may continue to install, '
                'but Webware may not perform as expected.\n'
                'Do you wish to continue with the installation?  [yes/no] ')
            return response[:1].upper() == "Y"
        return True

    def checkThreading(self):
        try:
            import threading
        except ImportError:
            print ('Webware requires that Python be compiled with threading support.\n'
                'This version of Python does not appear to support threading.\n')
            response = raw_input('You may continue, '
                'but you will have to run the AppServer with a Python\n'
                'interpreter that has threading enabled.\n'
                'Do you wish to continue with the installation? [yes/no] ')
            return response[:1].upper() == "Y"
        return True

    def detectComponents(self):
        print
        print 'Scanning for components...'
        dirNames = [dir for dir in os.listdir(os.curdir)
            if not dir.startswith('.') and os.path.isdir(dir)]
        self._maxCompLen = max(map(len, dirNames))
        oldPyVersion = False
        column = 0
        for dirName in sorted(dirNames):
            propName = dirName + '/Properties.py'
            try:
                print dirName.ljust(self._maxCompLen, '.'),
            except TypeError:
                print dirName.ljust(self._maxCompLen),
            if os.path.exists(propName):
                comp = PropertiesObject(propName)
                comp['dirname'] = dirName
                for key in self._props:
                    if key not in comp:
                        comp[key] = self._props[key]
                if sys.version_info[:3] < comp['requiredPyVersion']:
                    oldPyVersion = True
                    print 'no*',
                else:
                    self._comps.append(comp)
                    print 'yes',
            else:
                print 'no ',
            if column < 2 and not self._verbose:
                print '   ',
                column += 1
            else:
                print
                column = 0
        if column:
            print
        if oldPyVersion:
            print "* some components require a newer Python version"
        self._comps.sort(key=itemgetter('name'))

    def setupWebKitPassword(self, prompt, defpass):
        """Setup a password for WebKit Application server."""
        print 'Setting the WebKit password...'
        print
        if prompt:
            print 'Choose a password for the WebKit Application Server.'
            print 'If you will just press enter without entering anything,'
            if defpass is None:
                print 'a password will be automatically generated.'
            else:
                print 'the password specified on the command-line will be used.'
            from getpass import getpass
            password = getpass()
        else:
            if defpass is None:
                print 'A password will be automatically generated.'
            else:
                print 'A password was specified on the command-line.'
            password = None
        print 'You can check the password after installation at:'
        appConfig = 'WebKit/Configs/Application.config'
        print os.path.normpath(appConfig)
        if not password:
            if defpass is None:
                from string import letters, digits
                from random import choice
                password = ''.join(map(choice, [letters + digits]*8))
            else:
                password = defpass
        try: # read config file
            data = open(appConfig).read()
        except IOError:
            print 'Error reading Application.config file.'
            print 'Password not replaced, make sure to edit it by hand.'
            return
        # This will search for the construct "'AdminPassword': '...'"
        # and replace '...' with the content of the 'password' variable:
        if data.lstrip().startswith('{'):
            pattern = "('AdminPassword'\s*:)\s*'.*?'"
        else: # keyword arguments style
            pattern = "(AdminPassword\\s*=)\\s*['\"].*?['\"]"
        repl = "\g<1> '%s'" % password.replace( # escape critical characters
            '\\', '\\\\\\\\').replace("'", "\\\\'").replace('%', '\\\\045')
        from re import subn
        data, count = subn(pattern, repl, data)
        if count != 1:
            print "Warning:",
            if count > 1:
                print "More than one 'AdminPassword' in config file."
            else:
                print "'AdminPassword' not found in config file."
            return
        try: # write back config file
            open(appConfig, 'w').write(data)
        except IOError:
            print 'Error writing Application.config (probably no permission).'
            print 'Password not replaced, make sure to edit it by hand.'
            return
        print 'Password replaced successfully.'

    def installDocs(self, keep):
        self.processHtmlDocFiles()
        self.processPyTemplateFiles(keep)
        self.createBrowsableSource()
        self.createComponentIndex()
        self.createComponentIndexes(keep)
        self.createDocContexts()

    def processHtmlDocFiles(self):
        print
        print 'Processing html doc files...'
        for htmlFile in glob('Docs/*.html'):
            self.processHtmlDocFile(htmlFile)
        for comp in self._comps:
            dir = comp['dirname']
            for htmlFile in glob(dir + '/Docs/*.html'):
                self.processHtmlDocFile(htmlFile)

    def processPyTemplateFiles(self, keep):
        print
        print 'Processing phtml doc files...'
        if keep:
            print 'The templates will not be removed.'
        else:
            print 'The templates will be removed afterwards.'
        for inFile in glob('Docs/*.phtml'):
            if not os.path.splitext(inFile)[0].endswith('OfComponent'):
                self.processPyTemplateFile(inFile, self._props, keep)
        for comp in self._comps:
            dir = comp['dirname']
            for inFile in glob(dir + '/Docs/*.phtml'):
                self.processPyTemplateFile(inFile, comp, keep)

    def createBrowsableSource(self):
        """Create HTML docs for class hierarchies, summaries, sources etc."""
        print
        print 'Creating html source, summaries and doc files...'
        column = 0
        for comp in self._comps:
            dir = comp['dirname']
            if self._verbose:
                print dir, '...'
            else:
                try:
                    print dir.ljust(self._maxCompLen, '.'),
                except TypeError:
                    print dir.ljust(self._maxCompLen),
            sourceDir = dir + '/Docs/Source'
            self.makeDir(sourceDir)
            filesDir = sourceDir + '/Files'
            self.makeDir(filesDir)
            summariesDir = sourceDir + '/Summaries'
            self.makeDir(summariesDir)
            docsDir = sourceDir + '/Docs'
            self.makeDir(docsDir)
            if dir == 'MiddleKit':
                dir += '/Core'
            for pyFilename in glob(dir + '/*.py'):
                self.createHighlightedSource(pyFilename, filesDir)
                self.createPySummary(pyFilename, summariesDir)
                self.createPyDocs(pyFilename, docsDir)
            self.createPyDocs(dir, docsDir)
            self.createFileList(dir, sourceDir)
            self.createClassList(dir, sourceDir)
            if not self._verbose:
                print "ok",
                if column < 2:
                    print '    ',
                    column += 1
                else:
                    print
                    column = 0
        if column:
            print

    def createHighlightedSource(self, filename, dir):
        """Create highlighted HTML source code using py2html."""
        from DocSupport import py2html
        module = os.path.splitext(os.path.basename(filename))[0]
        targetName = '%s/%s.html' % (dir, module)
        self.printMsg('Creating %s...' % targetName)
        stdout = sys.stdout
        sys.stdout = StringIO()
        try:
            py2html.main((None, '-stdout', '-files', filename))
            result = sys.stdout.getvalue()
        finally:
            sys.stdout = stdout
        open(targetName, 'w').write(result)

    def createPySummary(self, filename, dir):
        """Create an HTML module summary."""
        from DocSupport.PySummary import PySummary
        module = os.path.splitext(os.path.basename(filename))[0]
        targetName = '%s/%s.html' % (dir, module)
        self.printMsg('Creating %s...' % targetName)
        sum = PySummary()
        sum.readConfig('DocSupport/PySummary.config')
        sum.readFileNamed(filename)
        html = sum.html()
        open(targetName, 'w').write(html)

    def createPyDocs(self, filename, dir):
        """Create an HTML module documentation using pydoc."""
        import pydoc
        package, module = os.path.split(filename)
        module = os.path.splitext(module)[0]
        if package:
            module = package.replace('/', '.') + '.' + module
        targetName = '%s/%s.html' % (dir, module)
        self.printMsg('Creating %s...' % targetName)
        saveDir = os.getcwd()
        os.chdir(dir)
        try:
            stdout = sys.stdout
            sys.stdout = StringIO()
            try:
                try:
                    pydoc.writedoc(module)
                except Exception:
                    pass
                msg = sys.stdout.getvalue()
            finally:
                sys.stdout = stdout
        finally:
            os.chdir(saveDir)
        if msg:
            self.printMsg(msg)

    def createFileList(self, filesDir, docsDir):
        """Create an HTML list of the source files."""
        from DocSupport.FileList import FileList
        name = filesDir.replace('/', '.')
        self.printMsg('Creating file list of %s...' % name)
        filelist = FileList(name)
        filesDir, subDir = (filesDir + '/').split('/', 1)
        saveDir = os.getcwd()
        os.chdir(filesDir)
        try:
            filelist.readFiles(subDir + '*.py')
            targetName = docsDir + '/FileList.html'
            self.printMsg('Creating %s...' % targetName)
            filelist.printForWeb('../' + targetName)
        finally:
            os.chdir(saveDir)

    def createClassList(self, filesDir, docsDir):
        """Create an HTML class hierarchy listing of the source files."""
        from DocSupport.ClassList import ClassList
        name = filesDir.replace('/', '.')
        self.printMsg('Creating class list of %s...' % name)
        classlist = ClassList(name)
        filesDir, subDir = (filesDir + '/').split('/', 1)
        saveDir = os.getcwd()
        os.chdir(filesDir)
        try:
            classlist.readFiles(subDir + '*.py')
            targetName = docsDir + '/ClassList.html'
            self.printMsg('Creating %s...' % targetName)
            classlist.printForWeb(False, '../' + targetName)
            targetName = docsDir + '/ClassHierarchy.html'
            self.printMsg('Creating %s...' % targetName)
            classlist.printForWeb(True, '../' + targetName)
        finally:
            os.chdir(saveDir)

    def createComponentIndex(self):
        """Create an HTML component index of Webware itself."""
        print 'Creating ComponentIndex.html...'
        ht = ["<% header('Webware Documentation', 'titlebar',"
            " 'ComponentIndex.css') %>"]
        wr = ht.append
        wr('<p>Don\'t know where to start? '
            'Try <a href="../WebKit/Docs/index.html">WebKit</a>.</p>')
        wr('<table align="center" border="0" '
            'cellpadding="2" cellspacing="2" width="100%">')
        wr('<tr class="ComponentHeadings">'
            '<th>Component</th><th>Status</th><th>Ver</th>'
            '<th>Py</th><th>Summary</th></tr>')
        row = 0
        for comp in self._comps:
            comp['nameAsLink'] = ('<a href='
                '"../%(dirname)s/Docs/index.html">%(name)s</a>' % comp)
            comp['indexRow'] = row + 1
            wr('<tr valign="top" class="ComponentRow%(indexRow)i">'
                '<td class="NameVersionCell">'
                '<span class="Name">%(nameAsLink)s</span></td>'
                '<td>%(status)s</td>'
                '<td><span class="Version">%(versionString)s</span></td>'
                '<td>%(requiredPyVersionString)s</td>'
                '<td>%(synopsis)s</td></tr>' % comp)
            row = 1 - row
        wr('</table>')
        wr("<% footer() %>")
        ht = '\n'.join(ht)
        ht = self.processPyTemplate(ht, self._props)
        open('Docs/ComponentIndex.html', 'w').write(ht)

    def createComponentIndexes(self, keep):
        """Create start page for all components."""
        indexfile = 'Docs/indexOfComponent.phtml'
        if not os.path.exists(indexfile):
            return
        print
        print "Creating index.html for all components..."
        index = open(indexfile).read()
        link = '<p><a href="%s">%s</a></p>'
        for comp in self._comps:
            comp['webwareVersion'] = self._props['version']
            comp['webwareVersionString'] = self._props['versionString']
            # Create 'htDocs' as an HTML fragment corresponding to comp['docs']
            ht = []
            for doc in comp['docs']:
                ht.append(link % (doc['file'], doc['name']))
            ht = ''.join(ht)
            comp['htDocs'] = ht
            # Set up release notes
            ht = []
            files = glob(comp['dirname'] + '/Docs/RelNotes-*.html')
            if files:
                releaseNotes = []
                for filename in files:
                    item = dict(dirname=os.path.basename(filename))
                    filename = item['dirname']
                    ver = filename[
                        filename.rfind('-') + 1 : filename.rfind('.')]
                    item['name'] = ver
                    if ver == 'X.Y':
                        item['ver'] = ver.split('.')
                    else:
                        i = 0
                        while i < len(ver) and ver[i] in '.0123456789':
                            i += 1
                        if i:
                            item['ver'] = map(int, ver[:i].split('.'))
                    releaseNotes.append(item)
                releaseNotes.sort(key=itemgetter('ver'), reverse=True)
                for item in releaseNotes:
                    ht.append(link % (item['dirname'], item['name']))
            else:
                ht.append('<p>None</p>')
            ht = '\n'.join(ht)
            comp['htReleaseNotes'] = ht
            # Write file
            filename = comp['dirname'] + '/Docs/index.html'
            ht = self.processPyTemplate(index, comp)
            open(filename, 'w').write(ht)
        if not keep:
            os.remove(indexfile)

    def createDocContexts(self):
        """Create a WebKit context for every Docs directory."""
        print
        print 'Making all Docs directories browsable via WebKit...'
        # Place an __init__.py file in every Docs directory
        docsDirs = ['Docs']
        for comp in self._comps:
            if comp.get('docs'):
                docsDir = comp['dirname'] + '/Docs'
                if os.path.isdir(docsDir):
                    docsDirs.append(docsDir)
        for docsDir in docsDirs:
            initFile = docsDir + '/__init__.py'
            if not os.path.exists(initFile):
                open(initFile, 'w').write(
                    '# this can be browsed as a Webware context\n')
        # Copy favicon to the default context
        open('WebKit/Examples/favicon.ico', 'wb').write(
            open('Docs/favicon.ico', 'rb').read())

    def backupConfigs(self):
        """Copy *.config to *.config.default, if they don't already exist.

        This allows the user to always go back to the default config file if
        needed (for troubleshooting for example).

        """
        print
        print 'Creating backups of original config files...'
        self._backupConfigs(os.curdir)

    def _backupConfigs(self, dir):
        for filename in os.listdir(dir):
            fullPath = os.path.join(dir, filename)
            if os.path.isdir(fullPath):
                self._backupConfigs(fullPath)
            elif (not filename.startswith('.') and
                    os.path.splitext(filename)[1] == '.config'):
                self.printMsg(fullPath)
                backupPath = fullPath + '.default'
                if not os.path.exists(backupPath):
                    open(backupPath, 'wb').write(open(fullPath, 'rb').read())

    def copyStartScript(self):
        """Copy the most appropriate start script to WebKit/webkit."""
        if os.name == 'posix':
            print
            print 'Copying start script...',
            ex = os.path.exists
            if (ex('/etc/rc.status')
                    and ex('/sbin/startproc') and ex('/sbin/killproc')):
                s = 'SuSE'
            elif (ex('/etc/init.d/functions')
                    or ex('/etc/rc.d/init.d/functions')):
                s = 'RedHat'
            elif ex('/sbin/start-stop-daemon'):
                s = 'Debian'
            elif ex('/etc/rc.subr'):
                s = 'NetBSD'
            else:
                s = 'Generic'
            print s
            # Copy start script:
            s = 'WebKit/StartScripts/' + s
            t = 'WebKit/webkit'
            open(t, 'wb').write(open(s, 'rb').read())

    def compileModules(self, force=True):
        """Compile modules in all installed componentes."""
        from compileall import compile_dir
        print
        print 'Byte compiling all modules...'
        for comp in self._comps:
            dir = os.path.abspath(comp['dirname'])
            compile_dir(dir, force=force, quiet=True)

    def fixPermissions(self):
        if os.name == 'posix':
            print
            print 'Setting permissions on CGI scripts...'
            for comp in self._comps:
                for filename in glob(comp['dirname'] + '/*.cgi'):
                    cmd = 'chmod a+rx ' + filename
                    self.printMsg(cmd)
                    os.system(cmd)
            print 'Setting permission on start script...'
            cmd = 'chmod a+rx WebKit/webkit'
            self.printMsg(cmd)
            os.system(cmd)

    def printGoodbye(self):
        print '''
Installation looks successful.

Welcome to Webware!

You can already try out the WebKit application server. Start it with
"WebKit%sAppServer" and point your browser to "http://localhost:8080".

Browsable documentation is available in the Docs folders.
You can use "Docs%sindex.html" as the main entry point.

Installation is finished.''' % ((os.sep,)*2)

    def writeLogFile(self, log):
        """Write the logged output to the install.log file."""
        open('install.log', 'w').write(''.join(log))


    ## Self utility ##

    def printKeyValue(self, key, value):
        """Print a key/value pair."""
        value = value.splitlines()
        v = value.pop(0)
        print '%12s: %s' % (key, v)
        for v in value:
            print '%14s%s' % ('', v)

    def makeDir(self, dirName):
        """Create a directory."""
        if not os.path.exists(dirName):
            self.printMsg('Making %s...' % dirName)
            os.makedirs(dirName)

    def htHeaderAndFooter(self):
        """Return header and footer from HTML template."""
        template = open('Docs/Template.html').read()
        return template.split('\n<!-- page content -->\n', 1)

    def processHtmlDocFile(self, htmlFile):
        """Process an HTML file."""
        txtFile = os.path.splitext(htmlFile)[0] + '.txt'
        if os.path.exists(txtFile):
            # A text file with the same name exists:
            page = open(htmlFile).read()
            if ('<meta name="generator" content="Docutils' in page
                    and '<h1 class="title">' in page):
                # This has obvisouly been created with Docutils; modify it
                # to match style, header and footer of all the other docs.
                page = page.replace('<h1 class="title">',
                    '<h1 class="header">')
                page = page.replace('</body>\n</html>', self._htFooter)
                self.printMsg('Modifying %s...' % htmlFile)
                open(htmlFile, 'w').write(page)

    def processPyTemplateFile(self, inFile, props, keep):
        """Process a Python template file."""
        page = open(inFile).read()
        page = self.processPyTemplate(page, props)
        outFile = os.path.splitext(inFile)[0] + '.html'
        self.printMsg('Creating %s...' % outFile)
        open(outFile, 'w').write(page)
        if not keep:
            os.remove(inFile) # remove template

    def processPyTemplate(self, input, props):
        """Process a Python template."""
        global scope

        def header(title, titleclass=None, style=None):
            """Get the header of a document."""
            if not titleclass:
                titleclass = 'header'
            titleclass = ' class="%s"' % titleclass
            link = '<link rel="stylesheet" href="%s" type="text/css">'
            stylesheets = ['Doc.css']
            if style and style.endswith('.css'):
                stylesheets.append(style)
                style = None
            css = []
            for s in stylesheets:
                if not scope['dirname'].startswith('.'):
                    s = '../../Docs/' + s
                s = link % s
                css.append(s)
            if style:
                css.extend(('<style type="text/css">',
                    '<!--', style, '-->', '</style>'))
            css = '\n'.join(css)
            return scope['htHeader'] % locals()

        def footer():
            """Get the footer of a document."""
            return scope['htFooter']

        scope = props.copy()
        scope.update(header=header, htHeader=self._htHeader,
            footer=footer, htFooter=self._htFooter)
        return self._autotoc.process(self._pytp.process(input, scope))


def printHelp():
    print "Usage: install.py [options]"
    print "Install WebWare in the local directory."
    print
    print "  -h, --help            Print this help screen."
    print "  -v, --verbose         Print extra information messages during install."
    print "  --no-password-prompt  Don't prompt for WebKit password during install."
    print "  --set-password=...    Set the WebKit password to the given value."
    print "  --keep-templates      Keep the templates for creating the docs."


if __name__ == '__main__':
    import getopt
    verbose = False
    passprompt = defaultpass = keepdocs = None
    try:
        opts, args = getopt.getopt(sys.argv[1:], "hv", ["help", "verbose",
            "no-password-prompt", "set-password=", "keep-templates"])
    except getopt.GetoptError:
        printHelp()
    else:
        for o, a in opts:
            if o in ("-v", "--verbose"):
                verbose = True
            elif o == "--no-password-prompt":
                passprompt = False
            elif o == "--set-password":
                defaultpass = a
            elif o == '--keep-templates':
                keepdocs = True
            elif o in ("-h", "--help", "h", "help"):
                printHelp()
                sys.exit(0)
        if passprompt is None and defaultpass is None:
            passprompt = True

        Installer().run(verbose=verbose, passprompt=passprompt,
            defaultpass=defaultpass, keepdocs=keepdocs)