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#!/usr/bin/python

__authors__ = "Martin Sandve Alnes"
__date__ = "2008-05-09"

# Modified by Anders Logg, 2009.
# Last changed: 2015-01-05

import io
import sys, optparse
from ufl.log import warning
from ufl.algorithms import load_ufl_file, validate_form, ufl2latex, tree_format

# Get commandline options

usage = """Analyse a .ufl file to find errors.
Optionally write information about
the forms for further inspection.

Examples:

  ufl-analyse --quiet=0 --write=1 mass.ufl"""

def opt(long, short, t, default, help):
    return optparse.make_option("--%s" % long, "-%s" % short, action="store", type=t, dest=long, default=default, help=help)

option_list = [ \
    opt("quiet", "q", "int", 1, "Do not print form information to screen."),
    opt("write", "w", "int", 0, "Write form information to file."),
    ]

parser = optparse.OptionParser(usage=usage, option_list=option_list)
args = sys.argv[1:]
(options, args) = parser.parse_args(args=args)

if not args:
    print("Missing files!")
    print()
    parser.print_usage()
    sys.exit(-1)
filenames = args

write_file = options.write
quiet = options.quiet

# Handle each form file separately
for filename in filenames:

    # Check file suffix
    if not filename.endswith(".ufl"):
        warning("Filename '%s' does not end with .ufl." % filename)

    # Load form file, which triggers many consistency
    # checks while the form is being built
    print("Loading form file '%s'" % filename)
    try:
        # TODO: Forms that fail will usually fail inside this,
        # which doesn't produce any log...
        # Perhaps we should pass a log file to load_forms?
        data = load_ufl_file(filename)
        forms = data.forms
    except:
        print("Failed to load form file.")
        raise

    outputfilename = filename + ".log"
    if write_file:
        outputfile = io.open(outputfilename, "w", encoding="utf-8")

    def write(*items):
        text = " ".join(str(s) for s in items)
        if write_file:
            outputfile.write(text)
            outputfile.flush()
        if not quiet:
            print(text)

    # Analyse each form separately
    for form in forms:

        # Validate form
        validate_form(form)

        # Compute form metadata and extract preprocessed form
        form_data = form.compute_form_data()
        preprocessed_form = form_data.preprocessed_form

        # Print form data
        write("\nForm data:\n", str(form_data))

        # Print different representations
        write("\n\nForm pretty-print (original):\n",        str(form))
        write("\n\nForm pretty-print (preprocessed):\n",    str(preprocessed_form))
        write("\n\nForm representation (original):\n",      repr(form))
        write("\n\nForm representation (preprocessed):\n",  repr(preprocessed_form))
        write("\n\nForm tree formatting (original):\n",     tree_format(form))
        write("\n\nForm tree formatting (preprocessed):\n", tree_format(preprocessed_form))
        write("\n\nForm LaTeX code (preprocessed):\n",      ufl2latex(form))

    if write_file:
        outputfile.close()