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scripts/svx2qm.py
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295
scripts/svx2qm.py
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#!/usr/bin/env python3
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# -*- coding: utf-8 -*-
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# Copyright © 2018 Philip Withnall
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#
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# This library is free software; you can redistribute it and/or
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# modify it under the terms of the GNU Lesser General Public
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# License as published by the Free Software Foundation; either
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# version 2 of the License, or (at your option) any later version.
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#
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# This library is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public
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# License along with this library; if not, write to the
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# Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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# Boston, MA 02111-1307, USA.
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import argparse
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import csv
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import sys
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class QmExtracter:
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"""
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Class implementing the svx2qm command line tool.
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This provides a way to extract question marks (QMs) from Survex files.
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The code in this class is currently tightly tied to the command line tool.
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"""
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def __init__(self, debug):
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self.debug = debug
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def extract_qms(self, svx_files):
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qms = []
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# Extract the QMs from the various Survex files.
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for svx_file in svx_files:
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survey_name_stack = []
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survey_date = None
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with open(svx_file) as fd:
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for line in fd:
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try:
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if line.lower().startswith('*begin'):
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parts = line.split()
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survey_name_stack.append(parts[1] if len(parts) > 1 else '')
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continue
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if line.lower().startswith('*end'):
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survey_name_stack.pop()
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continue
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if not survey_date and line.lower().startswith('*date'):
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parts = line.split()
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if len(parts) > 1:
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survey_date = parts[1]
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continue
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# Look for a line matching:
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# ;[ QM1 A surveyname.3 - description of QM ]
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# or
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# ;QM1 A surveyname.3 - description of QM
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is_placeholder = \
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(line.startswith(';[') or line.startswith('; ['))
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if not line.startswith(';'):
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continue
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fields = line[1:-1].split(None, 4)
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if not fields or len(fields) != 5:
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continue
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[name, grade, nearest_station,
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resolution_station, description] = fields
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if not name.lower().startswith('qm') or len(name) <= 2:
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continue
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# Sanitise the grade.
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grade = grade.upper()
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if grade not in ['A', 'B', 'C', 'D', 'E', 'X']:
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self.__print_error(svx_file, line,
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'Unknown QM grade ‘%s’' % grade)
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continue
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# Sanitise the resolution station.
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if resolution_station == '-':
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resolution_station = None
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# Sanitise the description.
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description = description.strip()
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# Warn about (and ignore) lines which are just the
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# example template.
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if nearest_station.startswith('surveyname.'):
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self.__print_error(svx_file, line,
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'QM line is an unmodified '
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'example line')
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continue
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# By this point we should have a survey name from a
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# *begin line (or series of them). If not, the survex
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# file is malformed.
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if not survey_name_stack:
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self.__print_error(svx_file, line,
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'No *begin with survey name')
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continue
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survey_name = '.'.join(survey_name_stack)
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# Warn if the line was a placeholder
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if is_placeholder:
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self.__print_error(svx_file, line,
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'QM line contains placeholder '
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'square brackets')
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continue
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# Warn if the nearest-station’s name doesn’t match the
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# survey name.
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if not nearest_station.startswith(survey_name + '.'):
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self.__print_error(svx_file, line,
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'QM nearest-station survey '
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'name (‘%s’) doesn’t match '
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'*begin statement in file '
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'(‘%s’)' %
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(nearest_station.split('.')[0],
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survey_name))
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continue
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# Warn if this QM number has been used before, then
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# ignore it.
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used_before = False
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for qm in qms:
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if qm[0] == survey_name and qm[2] == name:
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self.__print_error(svx_file, line,
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'QM number ‘%s’ already '
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'used in this file' % name)
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used_before = True
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break
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if used_before:
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continue
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qms.append((survey_name, survey_date, name, grade,
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nearest_station, resolution_station,
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description))
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except (ValueError, IndexError) as e:
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self.__print_error(svx_file, line, e)
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continue
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# Order them by grade, then date, and then by survey name.
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qms.sort(key=lambda qm: (qm[3], qm[1], qm[0]))
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return qms
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def format_qms(self, qms, format, include_resolved=False):
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if format == 'csv':
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self.format_qms_csv(qms, include_resolved)
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elif format == 'human':
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self.format_qms_human(qms, include_resolved)
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else:
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# Should never be reached: input validation should check the format
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assert(False)
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def format_qms_csv(self, qms, include_resolved=False):
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writer = csv.writer(sys.stdout)
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writer.writerow(['Survey name', 'Survey date',
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'QM name', 'Grade', 'Nearest station',
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'Resolution station', 'Description'])
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for qm in qms:
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# Do we actually want this QM, if it’s been resolved?
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if not include_resolved and qm[5]:
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continue
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writer.writerow(qm)
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def format_qms_human(self, qms, include_resolved=False, colour=True):
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# Work out the maximum width of each field.
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field_names = ['Survey name', 'Survey date', 'QM name', 'Grade',
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'Nearest station', 'Resolution station']
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lens = [len(field) for field in field_names]
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for qm in qms:
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# Do we actually want this QM, if it’s been resolved?
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if not include_resolved and qm[5]:
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continue
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for (idx, field) in enumerate(qm):
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if idx >= len(field_names):
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break
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lens[idx] = max(lens[idx], len(field) if field else 0)
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# Print a header (bold if possible).
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if colour:
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print('\033[1m', end='')
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line_format = ' '.join(['{:<{}}'] * len(field_names))
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flattened = [x for t in zip(field_names, lens) for x in t]
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print(line_format.format(*flattened))
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if colour:
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print('\033[0m', end='')
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print('─' * (sum(lens) + 2 * (len(lens) - 1)))
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# Adjust the width of the grade, survey and QM name fields to account
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# for the color escapes.
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if colour:
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lens[0] += 8
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lens[2] += 8
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lens[3] += 9
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# Print out the rows.
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n_printed = 0
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for qm in qms:
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(survey_name, survey_date, name, grade, nearest_station,
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resolution_station, description) = qm
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# Do we actually want this QM, if it’s been resolved?
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if not include_resolved and resolution_station:
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continue
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if not resolution_station:
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resolution_station = ''
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if colour:
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try:
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# See https://stackoverflow.com/a/33206814/2931197.
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grade_colour = {
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'A': '32',
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'B': '33',
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'C': '31',
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'D': '31',
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'E': '31',
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'X': '37',
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}[grade]
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except KeyError:
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grade_colour = '00'
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formatted_grade = '\033[{}m{}\033[0m'.format(grade_colour,
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grade)
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formatted_survey_name = '\033[4m{}\033[0m'.format(survey_name)
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formatted_name = '\033[4m{}\033[0m'.format(name)
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else:
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formatted_grade = grade
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formatted_survey_name = survey_name
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formatted_name = name
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print(line_format.format(formatted_survey_name, lens[0],
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survey_date, lens[1],
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formatted_name, lens[2],
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formatted_grade, lens[3],
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nearest_station, lens[4],
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resolution_station, lens[5]))
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print(' ' + description)
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n_printed += 1
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# Have we finished all the QMs?
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if n_printed == 0 and not qms:
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print('No QMs found')
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elif n_printed == 0:
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print('No unresolved QMs found (but %u resolved ones were)' %
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len(qms))
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def __print_error(self, svx_file, line, exc):
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sys.stderr.write('%s: %s\n %s\n' % (svx_file, exc, line))
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def main():
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"""
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Main entry point to svx2qm. Handles arguments.
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Usage example:
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find -name '*.svx' | xargs ./svx2qm.py --format human
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"""
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parser = argparse.ArgumentParser(
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description='Extract question marks (QMs) from one or more Survex '
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'files. The QMs must be formatted appropriately, and '
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'currently this script only supports commented-out QMs, '
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'as the format has not been standardised yet. The QMs can '
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'be returned as a human-readable list or as a CSV.')
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parser.add_argument('svx_files', metavar='SVX-FILE …', nargs='+',
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help='SVX files to extract QMs from')
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parser.add_argument('--format', choices=['csv', 'human'], default='human',
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help='output format (default: human)')
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parser.add_argument('--debug', action='store_true', default=False,
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help='output debug information')
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parser.add_argument('--include-resolved', action='store_true',
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default=False,
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help='include resolved QMs in the output')
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args = parser.parse_args()
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extracter = QmExtracter(args.debug)
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qms = extracter.extract_qms(args.svx_files)
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extracter.format_qms(qms, args.format, args.include_resolved)
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if __name__ == '__main__':
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main()
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