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362 lines
12 KiB
Python
Executable File
362 lines
12 KiB
Python
Executable File
#!/usr/bin/env python2.7
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"""A test case update script.
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This script is a utility to update LLVM 'llvm-mca' based test cases with new
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FileCheck patterns.
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"""
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import argparse
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from collections import defaultdict
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import glob
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import os
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import sys
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import warnings
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from UpdateTestChecks import common
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COMMENT_CHAR = '#'
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ADVERT_PREFIX = '{} NOTE: Assertions have been autogenerated by '.format(
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COMMENT_CHAR)
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ADVERT = '{}utils/{}'.format(ADVERT_PREFIX, os.path.basename(__file__))
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class Error(Exception):
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""" Generic Error to be raised without printing a traceback.
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"""
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pass
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def _warn(msg):
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""" Log a user warning to stderr.
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"""
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warnings.warn(msg, Warning, stacklevel=2)
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def _configure_warnings(args):
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warnings.resetwarnings()
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if args.w:
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warnings.simplefilter('ignore')
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if args.Werror:
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warnings.simplefilter('error')
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def _showwarning(message, category, filename, lineno, file=None, line=None):
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""" Version of warnings.showwarning that won't attempt to print out the
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line at the location of the warning if the line text is not explicitly
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specified.
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"""
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if file is None:
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file = sys.stderr
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if line is None:
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line = ''
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file.write(warnings.formatwarning(message, category, filename, lineno, line))
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def _parse_args():
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parser = argparse.ArgumentParser(description=__doc__)
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parser.add_argument('-v', '--verbose',
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action='store_true',
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help='show verbose output')
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parser.add_argument('-w',
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action='store_true',
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help='suppress warnings')
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parser.add_argument('-Werror',
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action='store_true',
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help='promote warnings to errors')
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parser.add_argument('--llvm-mca-binary',
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metavar='<path>',
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default='llvm-mca',
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help='the binary to use to generate the test case '
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'(default: llvm-mca)')
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parser.add_argument('tests',
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metavar='<test-path>',
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nargs='+')
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args = parser.parse_args()
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_configure_warnings(args)
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if os.path.basename(args.llvm_mca_binary) != 'llvm-mca':
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_warn('unexpected binary name: {}'.format(args.llvm_mca_binary))
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return args
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def _find_run_lines(input_lines, args):
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raw_lines = [m.group(1)
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for m in [common.RUN_LINE_RE.match(l) for l in input_lines]
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if m]
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run_lines = [raw_lines[0]] if len(raw_lines) > 0 else []
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for l in raw_lines[1:]:
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if run_lines[-1].endswith(r'\\'):
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run_lines[-1] = run_lines[-1].rstrip('\\') + ' ' + l
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else:
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run_lines.append(l)
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if args.verbose:
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sys.stderr.write('Found {} RUN line{}:\n'.format(
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len(run_lines), '' if len(run_lines) == 1 else 's'))
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for line in run_lines:
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sys.stderr.write(' RUN: {}\n'.format(line))
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return run_lines
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def _get_run_infos(run_lines, args):
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run_infos = []
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for run_line in run_lines:
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try:
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(tool_cmd, filecheck_cmd) = tuple([cmd.strip()
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for cmd in run_line.split('|', 1)])
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except ValueError:
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_warn('could not split tool and filecheck commands: {}'.format(run_line))
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continue
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tool_basename = os.path.basename(args.llvm_mca_binary)
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if not tool_cmd.startswith(tool_basename + ' '):
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_warn('skipping non-{} RUN line: {}'.format(tool_basename, run_line))
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continue
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if not filecheck_cmd.startswith('FileCheck '):
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_warn('skipping non-FileCheck RUN line: {}'.format(run_line))
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continue
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tool_cmd_args = tool_cmd[len(tool_basename):].strip()
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tool_cmd_args = tool_cmd_args.replace('< %s', '').replace('%s', '').strip()
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check_prefixes = [item
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for m in common.CHECK_PREFIX_RE.finditer(filecheck_cmd)
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for item in m.group(1).split(',')]
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if not check_prefixes:
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check_prefixes = ['CHECK']
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run_infos.append((check_prefixes, tool_cmd_args))
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return run_infos
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def _get_block_infos(run_infos, test_path, args): # noqa
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""" For each run line, run the tool with the specified args and collect the
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output. We use the concept of 'blocks' for uniquing, where a block is
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a series of lines of text with no more than one newline character between
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each one. For example:
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This
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is
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one
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block
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This is
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another block
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This is yet another block
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We then build up a 'block_infos' structure containing a dict where the
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text of each block is the key and a list of the sets of prefixes that may
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generate that particular block. This then goes through a series of
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transformations to minimise the amount of CHECK lines that need to be
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written by taking advantage of common prefixes.
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"""
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def _block_key(tool_args, prefixes):
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""" Get a hashable key based on the current tool_args and prefixes.
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"""
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return ' '.join([tool_args] + prefixes)
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all_blocks = {}
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max_block_len = 0
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# Run the tool for each run line to generate all of the blocks.
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for prefixes, tool_args in run_infos:
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key = _block_key(tool_args, prefixes)
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raw_tool_output = common.invoke_tool(args.llvm_mca_binary,
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tool_args,
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test_path)
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# Replace any lines consisting of purely whitespace with empty lines.
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raw_tool_output = '\n'.join(line if line.strip() else ''
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for line in raw_tool_output.splitlines())
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# Split blocks, stripping all trailing whitespace, but keeping preceding
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# whitespace except for newlines so that columns will line up visually.
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all_blocks[key] = [b.lstrip('\n').rstrip()
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for b in raw_tool_output.split('\n\n')]
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max_block_len = max(max_block_len, len(all_blocks[key]))
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# If necessary, pad the lists of blocks with empty blocks so that they are
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# all the same length.
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for key in all_blocks:
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len_to_pad = max_block_len - len(all_blocks[key])
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all_blocks[key] += [''] * len_to_pad
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# Create the block_infos structure where it is a nested dict in the form of:
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# block number -> block text -> list of prefix sets
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block_infos = defaultdict(lambda: defaultdict(list))
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for prefixes, tool_args in run_infos:
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key = _block_key(tool_args, prefixes)
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for block_num, block_text in enumerate(all_blocks[key]):
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block_infos[block_num][block_text].append(set(prefixes))
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# Now go through the block_infos structure and attempt to smartly prune the
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# number of prefixes per block to the minimal set possible to output.
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for block_num in range(len(block_infos)):
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# When there are multiple block texts for a block num, remove any
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# prefixes that are common to more than one of them.
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# E.g. [ [{ALL,FOO}] , [{ALL,BAR}] ] -> [ [{FOO}] , [{BAR}] ]
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all_sets = [s for s in block_infos[block_num].values()]
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pruned_sets = []
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for i, setlist in enumerate(all_sets):
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other_set_values = set([elem for j, setlist2 in enumerate(all_sets)
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for set_ in setlist2 for elem in set_
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if i != j])
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pruned_sets.append([s - other_set_values for s in setlist])
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for i, block_text in enumerate(block_infos[block_num]):
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# When a block text matches multiple sets of prefixes, try removing any
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# prefixes that aren't common to all of them.
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# E.g. [ {ALL,FOO} , {ALL,BAR} ] -> [{ALL}]
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common_values = pruned_sets[i][0].copy()
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for s in pruned_sets[i][1:]:
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common_values &= s
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if common_values:
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pruned_sets[i] = [common_values]
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# Everything should be uniqued as much as possible by now. Apply the
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# newly pruned sets to the block_infos structure.
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# If there are any blocks of text that still match multiple prefixes,
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# output a warning.
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current_set = set()
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for s in pruned_sets[i]:
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s = sorted(list(s))
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if s:
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current_set.add(s[0])
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if len(s) > 1:
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_warn('Multiple prefixes generating same output: {} '
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'(discarding {})'.format(','.join(s), ','.join(s[1:])))
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block_infos[block_num][block_text] = sorted(list(current_set))
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return block_infos
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def _write_output(test_path, input_lines, prefix_list, block_infos, # noqa
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args):
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prefix_set = set([prefix for prefixes, _ in prefix_list
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for prefix in prefixes])
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not_prefix_set = set()
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output_lines = []
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for input_line in input_lines:
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if input_line.startswith(ADVERT_PREFIX):
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continue
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if input_line.startswith(COMMENT_CHAR):
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m = common.CHECK_RE.match(input_line)
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try:
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prefix = m.group(1)
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except AttributeError:
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prefix = None
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if '{}-NOT:'.format(prefix) in input_line:
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not_prefix_set.add(prefix)
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if prefix not in prefix_set or prefix in not_prefix_set:
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output_lines.append(input_line)
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continue
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if common.should_add_line_to_output(input_line, prefix_set):
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# This input line of the function body will go as-is into the output.
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# Except make leading whitespace uniform: 2 spaces.
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input_line = common.SCRUB_LEADING_WHITESPACE_RE.sub(r' ', input_line)
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# Skip empty lines if the previous output line is also empty.
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if input_line or output_lines[-1]:
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output_lines.append(input_line)
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else:
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continue
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# Add a blank line before the new checks if required.
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if output_lines[-1]:
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output_lines.append('')
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output_check_lines = []
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for block_num in range(len(block_infos)):
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for block_text in sorted(block_infos[block_num]):
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if not block_text:
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continue
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if block_infos[block_num][block_text]:
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lines = block_text.split('\n')
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for prefix in block_infos[block_num][block_text]:
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if prefix in not_prefix_set:
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_warn('not writing for prefix {0} due to presence of "{0}-NOT:" '
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'in input file.'.format(prefix))
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continue
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output_check_lines.append(
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'{} {}: {}'.format(COMMENT_CHAR, prefix, lines[0]).rstrip())
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for line in lines[1:]:
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output_check_lines.append(
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'{} {}-NEXT: {}'.format(COMMENT_CHAR, prefix, line).rstrip())
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output_check_lines.append('')
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if output_check_lines:
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output_lines.insert(0, ADVERT)
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output_lines.extend(output_check_lines)
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if input_lines == output_lines:
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sys.stderr.write(' [unchanged]\n')
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return
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sys.stderr.write(' [{} lines total]\n'.format(len(output_lines)))
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if args.verbose:
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sys.stderr.write(
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'Writing {} lines to {}...\n\n'.format(len(output_lines), test_path))
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with open(test_path, 'wb') as f:
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for line in output_lines:
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f.write('{}\n'.format(line.rstrip()).encode())
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def main():
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args = _parse_args()
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test_paths = [test for pattern in args.tests for test in glob.glob(pattern)]
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for test_path in test_paths:
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sys.stderr.write('Test: {}\n'.format(test_path))
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# Call this per test. By default each warning will only be written once
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# per source location. Reset the warning filter so that now each warning
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# will be written once per source location per test.
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_configure_warnings(args)
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if args.verbose:
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sys.stderr.write(
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'Scanning for RUN lines in test file: {}\n'.format(test_path))
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if not os.path.isfile(test_path):
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raise Error('could not find test file: {}'.format(test_path))
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with open(test_path) as f:
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input_lines = [l.rstrip() for l in f]
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run_lines = _find_run_lines(input_lines, args)
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run_infos = _get_run_infos(run_lines, args)
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block_infos = _get_block_infos(run_infos, test_path, args)
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_write_output(test_path, input_lines, run_infos, block_infos, args)
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return 0
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if __name__ == '__main__':
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try:
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warnings.showwarning = _showwarning
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sys.exit(main())
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except Error as e:
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sys.stdout.write('error: {}\n'.format(e))
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sys.exit(1)
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