#!/usr/bin/env python
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# Version: MPL 1.1/GPL 2.0/LGPL 2.1
#
# The contents of this file are subject to the Mozilla Public License
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# The Initial Developer of the Original Code is ActiveState Software Inc.
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# Contributors:
#   Eric Promislow (EricP@ActiveState.com)

"""
    perlcile - a Code Intelligence Language Engine for the Perl language

    Module Usage:
        from perlcile import scan_purelang
        content = open("foo.pl", "r").read()
        scan_purelang(content, "foo.pl")

    Command-line Usage:
        perlcile.py [<options>...] [<Perl file>]

    Options:
        -h, --help          dump this help and exit
        -V, --version       dump this script's version and exit
        -v, --verbose       verbose output, use twice for more verbose output
        -f, --filename <path>   specify the filename of the file content
                            passed in on stdin, this is used for the "path"
                            attribute of the emitted <file> tag.
        --md5=<string>      md5 hash for the input
        --mtime=<secs>      modification time for output info, in #secs since
                            1/1/70.
        -L, --language <name>
                            the language of the file being scanned
        -c, --clock         print timing info for scans (CIX is not printed)

    One or more Perl files can be specified as arguments or content can be
    passed in on stdin. A directory can also be specified, in which case
    all .pl files in that directory are scanned.

    This is a Language Engine for the Code Intelligence (codeintel) system.
    Code Intelligence XML format. See:
        http://specs.activestate.com/Komodo_3.0/func/code_intelligence.html
        http://specs.tl.activestate.com/kd/kd-0100.html

    The command-line interface will return non-zero iff the scan failed.
"""

import os
import os.path
import sys
import getopt
from hashlib import md5
import re
import logging
import glob
import time
import stat

from ciElementTree import Element, SubElement, tostring
from SilverCity import ScintillaConstants

from codeintel2 import perl_lexer, perl_parser, util
from codeintel2.tree import pretty_tree_from_tree
from codeintel2.common import CILEError
from codeintel2 import parser_cix

#---- global data

_version_ = (0, 1, 0)
log = logging.getLogger("perlcile")
# log.setLevel(logging.DEBUG)

_gClockIt = 0   # if true then we are gathering timing data
_gClock = None  # if gathering timing data this is set to time retrieval fn
_gStartTime = None   # start time of current file being scanned

gProvideFullDocs = False


#---- internal support
# This code has intimate knowledge of the code objects defined in
# perl_parser.py

def scan_purelang(buf):
    content = buf.accessor.text.expandtabs(8)
    tokenizer = perl_lexer.PerlLexer(content, gProvideFullDocs)
    parser = perl_parser.Parser(tokenizer, provide_full_docs=gProvideFullDocs)
    parser.moduleName = buf.path
    parse_tree = parser.parse()
    tree = parser.produce_CIX()
    return tree


def scan_multilang(tokens, module_elem):
    """Build the Perl module CIX element tree.

        "tokens" is a generator of UDL tokens for this UDL-based
            multi-lang document.
        "module_elem" is the <module> element of a CIX element tree on
            which the Perl module should be built.

    This should return a list of the CSL tokens in the token stream.
    """

    tokenizer = perl_lexer.PerlMultiLangLexer(tokens)
    # "PerlHTML" is about all we need for whichever Perl-based
    # template language is being used.  This could just as easily be a
    # boolean that indicates whether we're processing a pure language
    # or a multi-lang one.

    parser = perl_parser.Parser(
        tokenizer, lang="PerlHTML", provide_full_docs=gProvideFullDocs)
    parser.moduleName = ""  # Unknown
    parser.parse()
    parse_tree = parser.produce_CIX_NoHeader(module_elem)
    csl_tokens = tokenizer.get_csl_tokens()
    return csl_tokens, tokenizer.has_perl_code()

#---- mainline


def main(argv):
    logging.basicConfig()
    # Parse options.
    try:
        opts, args = getopt.getopt(argv[1:], "Vvhf:cL:",
                                   ["version", "verbose", "help", "filename=", "md5=", "mtime=",
                                    "clock", "language="])
    except getopt.GetoptError, ex:
        log.error(str(ex))
        log.error("Try `perlcile --help'.")
        return 1
    numVerboses = 0
    stdinFilename = None
    md5sum = None
    mtime = None
    lang = "Perl"
    global _gClockIt
    for opt, optarg in opts:
        if opt in ("-h", "--help"):
            sys.stdout.write(__doc__)
            return
        elif opt in ("-V", "--version"):
            ver = '.'.join([str(part) for part in _version_])
            print "perlcile %s" % ver
            return
        elif opt in ("-v", "--verbose"):
            numVerboses += 1
            if numVerboses == 1:
                log.setLevel(logging.INFO)
            else:
                log.setLevel(logging.DEBUG)
        elif opt in ("-f", "--filename"):
            stdinFilename = optarg
        elif opt in ("-L", "--language"):
            lang = optarg
        elif opt in ("--md5",):
            md5sum = optarg
        elif opt in ("--mtime",):
            mtime = optarg
        elif opt in ("-c", "--clock"):
            _gClockIt = 1
            global _gClock
            if sys.platform.startswith("win"):
                _gClock = time.clock
            else:
                _gClock = time.time

    if len(args) == 0:
        contentOnStdin = 1
        filenames = [stdinFilename or "<stdin>"]
    else:
        contentOnStdin = 0
        paths = []
        for arg in args:
            paths += glob.glob(arg)
        filenames = []
        for path in paths:
            if os.path.isfile(path):
                filenames.append(path)
            elif os.path.isdir(path):
                perlfiles = [os.path.join(path, n) for n in os.listdir(path)
                             if os.path.splitext(n)[1] in (".pl", ".pm")]
                perlfiles = [f for f in perlfiles if os.path.isfile(f)]
                filenames += perlfiles

    if 1:
        for filename in filenames:
            if contentOnStdin:
                log.debug("reading content from stdin")
                content = sys.stdin.read()
                log.debug("finished reading content from stdin")
                if mtime is None:
                    mtime = int(time.time())
            else:
                if mtime is None:
                    mtime = int(os.stat(filename)[stat.ST_MTIME])
                content = open(filename, 'r').read()

            if _gClockIt:
                sys.stdout.write("scanning '%s'..." % filename)
                global _gStartTime
                _gStartTime = _gClock()
            data = scan(
                content, filename, md5sum=md5sum, mtime=mtime, lang=lang)
            if _gClockIt:
                sys.stdout.write(" %.3fs\n" % (_gClock()-_gStartTime))
            elif data:
                sys.stdout.write(data)
    try:
        pass
    except KeyboardInterrupt:
        log.debug("user abort")
        return 1

if __name__ == "__main__":
    sys.exit(main(sys.argv))
