|
1
|
|
|
import json |
|
2
|
|
|
from shlex import split as shlex_split |
|
3
|
|
|
from distutils.spawn import find_executable as which # pylint: disable=import-error,no-name-in-module |
|
4
|
|
|
from subprocess import run, PIPE |
|
5
|
|
|
from collections import Counter |
|
6
|
|
|
|
|
7
|
|
|
from ocrd_utils import getLogger, parse_json_string_or_file |
|
8
|
|
|
from ocrd.processor.base import run_cli |
|
9
|
|
|
from ocrd.resolver import Resolver |
|
10
|
|
|
from ocrd_validators import ParameterValidator, WorkspaceValidator, ValidationReport |
|
11
|
|
|
|
|
12
|
|
|
class ProcessorTask(): |
|
13
|
|
|
|
|
14
|
|
|
@classmethod |
|
15
|
|
|
def parse(cls, argstr): |
|
16
|
|
|
tokens = shlex_split(argstr) |
|
17
|
|
|
executable = 'ocrd-%s' % tokens.pop(0) |
|
18
|
|
|
input_file_grps = [] |
|
19
|
|
|
output_file_grps = [] |
|
20
|
|
|
parameter_path = None |
|
21
|
|
|
while tokens: |
|
22
|
|
|
if tokens[0] == '-I': |
|
23
|
|
|
for grp in tokens[1].split(','): |
|
24
|
|
|
input_file_grps.append(grp) |
|
25
|
|
|
tokens = tokens[2:] |
|
26
|
|
|
elif tokens[0] == '-O': |
|
27
|
|
|
for grp in tokens[1].split(','): |
|
28
|
|
|
output_file_grps.append(grp) |
|
29
|
|
|
tokens = tokens[2:] |
|
30
|
|
|
elif tokens[0] == '-p': |
|
31
|
|
|
parameter_path = tokens[1] |
|
32
|
|
|
tokens = tokens[2:] |
|
33
|
|
|
else: |
|
34
|
|
|
raise Exception("Failed parsing task description '%s' with tokens remaining: '%s'" % (argstr, tokens)) |
|
35
|
|
|
return ProcessorTask(executable, input_file_grps, output_file_grps, parameter_path) |
|
36
|
|
|
|
|
37
|
|
|
def __init__(self, executable, input_file_grps, output_file_grps, parameter_path=None): |
|
38
|
|
|
self.executable = executable |
|
39
|
|
|
self.input_file_grps = input_file_grps |
|
40
|
|
|
self.output_file_grps = output_file_grps |
|
41
|
|
|
self.parameter_path = parameter_path |
|
42
|
|
|
self._ocrd_tool_json = None |
|
43
|
|
|
|
|
44
|
|
|
@property |
|
45
|
|
|
def ocrd_tool_json(self): |
|
46
|
|
|
if self._ocrd_tool_json: |
|
47
|
|
|
return self._ocrd_tool_json |
|
48
|
|
|
result = run([self.executable, '--dump-json'], stdout=PIPE, check=True, universal_newlines=True) |
|
49
|
|
|
self._ocrd_tool_json = json.loads(result.stdout) |
|
50
|
|
|
return self._ocrd_tool_json |
|
51
|
|
|
|
|
52
|
|
|
def validate(self): |
|
53
|
|
|
if not which(self.executable): |
|
54
|
|
|
raise Exception("Executable not found in PATH: %s" % self.executable) |
|
55
|
|
|
if not self.input_file_grps: |
|
56
|
|
|
raise Exception("Task must have input file group") |
|
57
|
|
|
parameters = {} |
|
58
|
|
|
if self.parameter_path: |
|
59
|
|
|
parameters = parse_json_string_or_file(self.parameter_path) |
|
60
|
|
|
param_validator = ParameterValidator(self.ocrd_tool_json) |
|
61
|
|
|
report = param_validator.validate(parameters) |
|
62
|
|
|
if not report.is_valid: |
|
63
|
|
|
raise Exception(report.errors) |
|
64
|
|
|
if 'output_file_grp' in self.ocrd_tool_json and not self.output_file_grps: |
|
65
|
|
|
raise Exception("Processor requires output_file_grp but none was provided.") |
|
66
|
|
|
return report |
|
67
|
|
|
|
|
68
|
|
|
def __str__(self): |
|
69
|
|
|
ret = '%s -I %s -O %s' % ( |
|
70
|
|
|
self.executable.replace('ocrd-', '', 1), |
|
71
|
|
|
','.join(self.input_file_grps), |
|
72
|
|
|
','.join(self.output_file_grps)) |
|
73
|
|
|
if self.parameter_path: |
|
74
|
|
|
ret += ' -p %s' % self.parameter_path |
|
75
|
|
|
return ret |
|
76
|
|
|
|
|
77
|
|
|
def validate_tasks(tasks, workspace): |
|
78
|
|
|
report = ValidationReport() |
|
79
|
|
|
prev_output_file_grps = workspace.mets.file_groups |
|
80
|
|
|
|
|
81
|
|
|
# first task: check input/output file groups from METS |
|
82
|
|
|
# TODO disable output_file_grps checks once CLI parameter 'overwrite' is implemented |
|
83
|
|
|
WorkspaceValidator.check_file_grp(workspace, tasks[0].input_file_grps, tasks[0].output_file_grps, report) |
|
84
|
|
|
|
|
85
|
|
|
prev_output_file_grps += tasks[0].input_file_grps |
|
86
|
|
|
for task in tasks[1:]: |
|
87
|
|
|
task.validate() |
|
88
|
|
|
# check either existing fileGrp or output-file group of previous task matches current input_file_group |
|
89
|
|
|
for input_file_grp in task.input_file_grps: |
|
90
|
|
|
if not input_file_grp in prev_output_file_grps: |
|
91
|
|
|
report.add_error("Input file group not contained in METS or produced by previous steps: %s" % input_file_grp) |
|
92
|
|
|
# TODO disable output_file_grps checks once CLI parameter 'overwrite' is implemented |
|
93
|
|
|
# XXX Thu Jan 16 20:14:17 CET 2020 still not sufficiently clever. |
|
94
|
|
|
# if len(prev_output_file_grps) != len(set(prev_output_file_grps)): |
|
95
|
|
|
# report.add_error("Output file group specified multiple times: %s" % |
|
96
|
|
|
# [grp for grp, count in Counter(prev_output_file_grps).items() if count >= 2]) |
|
97
|
|
|
prev_output_file_grps += task.output_file_grps |
|
98
|
|
|
if not report.is_valid: |
|
99
|
|
|
raise Exception("Invalid task sequence input/output file groups: %s" % report.errors) |
|
100
|
|
|
return report |
|
101
|
|
|
|
|
102
|
|
|
|
|
103
|
|
|
def run_tasks(mets, log_level, page_id, task_strs): |
|
104
|
|
|
resolver = Resolver() |
|
105
|
|
|
workspace = resolver.workspace_from_url(mets) |
|
106
|
|
|
log = getLogger('ocrd.task_sequence.run_tasks') |
|
107
|
|
|
tasks = [ProcessorTask.parse(task_str) for task_str in task_strs] |
|
108
|
|
|
|
|
109
|
|
|
validate_tasks(tasks, workspace) |
|
110
|
|
|
|
|
111
|
|
|
# Run the tasks |
|
112
|
|
|
for task in tasks: |
|
113
|
|
|
|
|
114
|
|
|
log.info("Start processing task '%s'", task) |
|
115
|
|
|
|
|
116
|
|
|
# execute cli |
|
117
|
|
|
returncode = run_cli( |
|
118
|
|
|
task.executable, |
|
119
|
|
|
mets, |
|
120
|
|
|
resolver, |
|
121
|
|
|
workspace, |
|
122
|
|
|
log_level=log_level, |
|
123
|
|
|
page_id=page_id, |
|
124
|
|
|
input_file_grp=','.join(task.input_file_grps), |
|
125
|
|
|
output_file_grp=','.join(task.output_file_grps), |
|
126
|
|
|
parameter=task.parameter_path |
|
127
|
|
|
) |
|
128
|
|
|
|
|
129
|
|
|
# check return code |
|
130
|
|
|
if returncode != 0: |
|
131
|
|
|
raise Exception("%s exited with non-zero return value %s" % (task.executable, returncode)) |
|
132
|
|
|
|
|
133
|
|
|
log.info("Finished processing task '%s'", task) |
|
134
|
|
|
|
|
135
|
|
|
# reload mets |
|
136
|
|
|
workspace.reload_mets() |
|
137
|
|
|
|
|
138
|
|
|
# check output file groups are in mets |
|
139
|
|
|
for output_file_grp in task.output_file_grps: |
|
140
|
|
|
if not output_file_grp in workspace.mets.file_groups: |
|
141
|
|
|
raise Exception("Invalid state: expected output file group not in mets: %s" % output_file_grp) |
|
142
|
|
|
|
|
143
|
|
|
|
OCR-D /
core
