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#! /usr/bin/env python
# -*- coding: utf-8 -*-
# copyright 2014 Hamilton Kibbe <ham@hamiltonkib.be>
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
# http://www.apache.org/licenses/LICENSE-2.0
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import os
import re
import warnings
from collections import namedtuple
from .excellon import ExcellonFile
from .ipc356 import IPCNetlist
def match_files(filenames):
matches = {}
for generator, rules in MATCH_RULES.items():
gen = {}
matches[generator] = gen
for layer, regex in rules.items():
for fn in filenames:
if (m := re.fullmatch(regex, fn.name.lower())):
if layer == 'inner copper':
layer = 'inner_' + ''.join(m.groups()) + ' copper'
gen[layer] = gen.get(layer, []) + [fn]
return matches
def best_match(filenames):
matches = match_files(filenames)
matches = sorted(matches.items(), key=lambda pair: len(pair[1]))
generator, files = matches[-1]
return generator, files
def identify_file(data):
if 'M48' in data or 'G90' in data:
return 'excellon'
if 'FSLAX' in data or 'FSTAX' in data:
return 'gerber'
return None
def common_prefix(l):
out = []
for cand in l:
score = lambda n: sum(elem.startswith(cand[:n]) for elem in l)
baseline = score(1)
if len(l) - baseline > 5:
continue
for n in range(2, len(cand)):
if len(l) - score(n) > 5:
break
out.append(cand[:n-1])
if not out:
return ''
return sorted(out, key=len)[-1]
def autoguess(filenames):
prefix = common_prefix([f.name for f in filenames])
matches = { layername_autoguesser(f.name[len(prefix):] if f.name.startswith(prefix) else f.name): f
for f in filenames }
inner_layers = [ m for m in matches if 'inner' in m ]
if len(inner_layers) >= 4 and not 'copper top' in matches and not 'copper bottom' in matches:
matches['copper top'] = matches.pop('copper inner1')
last_inner = sorted(inner_layers, key=lambda name: int(name.partition(' ')[0].partition('_')[2]))[-1]
matches['copper bottom'] = matches.pop(last_inner)
return matches
def layername_autoguesser(fn):
fn, _, _ext = fn.lower().rpartition('.')
side, use = 'unknown', 'unknown'
hint = ''
if re.match('top|front|pri?m?(ary)?', fn):
side = 'top'
use = 'copper'
if re.match('bot|bottom|back|sec(ondary)?', fn):
side = 'bottom'
use = 'copper'
if re.match('silks?(creen)?', fn):
use = 'silk'
elif re.match('(solder)?paste', fn):
use = 'paste'
elif re.match('(solder)?mask', fn):
use = 'mask'
elif (m := re.match('([tbcps])sm([tbcps])', fn)):
use = 'mask'
hint = m[1] + m[2]
elif (m := re.match('([tbcps])sp([tbcps])', fn)):
use = 'paste'
hint = m[1] + m[2]
elif (m := re.match('([tbcps])sl?k([tbcps])', fn)):
use = 'silk'
hint = m[1] + m[2]
elif (m := re.match('(la?y?e?r?|inn?e?r?)\W*([0-9]+)', fn)):
use = 'copper'
side = f'inner_{m[1]}'
elif re.match('film', fn):
use = 'copper'
elif re.match('drill|rout?e?|outline'):
use = 'drill'
side = 'unknown'
if re.match('np(th)?|(non|un)\W*plated|(non|un)\Wgalv', fn):
side = 'nonplated'
elif re.match('pth|plated|galv', fn):
side = 'plated'
if side is None and hint:
hint = set(hint)
if len(hint) == 1:
and hint[0] in 'tpc':
side = 'top'
else
side = 'bottom'
return f'{use} {side}'
class LayerStack:
@classmethod
def from_directory(kls, directory, board_name=None, verbose=False):
directory = Path(directory)
if not directory.is_dir():
raise FileNotFoundError(f'{directory} is not a directory')
files = [ path for path in directory.glob('**/*') if path.is_file() ]
generator, filemap = best_match(files)
if len(filemap) < 6:
generator = None
filemap = autoguess(files)
if len(filemap < 6):
raise ValueError('Cannot figure out gerber file mapping')
elif generator == 'geda':
# geda is written by geniuses who waste no bytes of unnecessary output so it doesn't actually include the
# number format in files that use imperial units. Unfortunately it also doesn't include any hints that the
# file was generated by geda, so we have to guess by context whether this is just geda being geda or
# potential user error.
excellon_settings = FileSettings(number_format=(2, 4))
elif generator == 'allegro':
# Allegro puts information that is absolutely vital for parsing its excellon files... into another file,
# next to the actual excellon file. Despite pretty much everyone else having figured out a way to put that
# info into the excellon file itself, even if only as a comment.
if 'excellon params' in filemap:
excellon_settings = parse_allegro_ncparam(filemap['excellon params'][0].read_text())
del filemap['excellon params']
# Ignore if we can't find the param file -- maybe the user has convinced Allegro to actually put this
# information into a comment, or maybe they have made Allegro just use decimal points like XNC does.
filemap = autoguess([ f for files in filemap for f in files ])
if len(filemap < 6):
raise SystemError('Cannot figure out gerber file mapping')
else:
excellon_settings = None
if any(len(value) > 1 for value in filemap.values()):
raise SystemError('Ambgiuous layer names')
filemap = { key: values[0] for key, value in filemap.items() }
layers = {}
for key, path in filemap.items():
if 'outline' in key or 'drill' in key and identify_file(path.read_text()) != 'gerber':
if 'nonplated' in key:
plated = False
elif 'plated' in key:
plated = True
else:
plated = None
layers[key] = ExcellonFile.open(path, plated=plated, settings=excellon_settings)
else:
layers[key] = GerberFile.open(path)
hints = { layers[key].generator_hints } + { generator }
if len(hints) > 1:
warnings.warn('File identification returned ambiguous results. Please raise an issue on the gerbonara '
'tracker and if possible please provide these input files for reference.')
board_name = common_prefix([f.name for f in filemap.values()])
board_name = re.subs('^\W+', '', board_name)
board_name = re.subs('\W+$', '', board_name)
return kls(layers, board_name=board_name)
def __init__(self, layers, board_name=None):
self.layers = layers
self.board_name = board_name
def __len__(self):
return len(self.layers)
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