summaryrefslogtreecommitdiffstats
path: root/bin/update_pch_bisect
diff options
context:
space:
mode:
Diffstat (limited to 'bin/update_pch_bisect')
-rwxr-xr-xbin/update_pch_bisect354
1 files changed, 354 insertions, 0 deletions
diff --git a/bin/update_pch_bisect b/bin/update_pch_bisect
new file mode 100755
index 000000000..8c86ac3cc
--- /dev/null
+++ b/bin/update_pch_bisect
@@ -0,0 +1,354 @@
+#! /usr/bin/env python
+# -*- Mode: python; tab-width: 4; indent-tabs-mode: t -*-
+#
+# This file is part of the LibreOffice project.
+#
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+#
+
+"""
+This script is to fix precompiled headers.
+
+This script runs in two modes.
+In one mode, it starts with a header
+that doesn't compile. If finds the
+minimum number of includes in the
+header to remove to get a successful
+run of the command (i.e. compile).
+
+In the second mode, it starts with a
+header that compiles fine, however,
+it contains one or more required
+include without which it wouldn't
+compile, which it identifies.
+
+Usage: ./bin/update_pch_bisect ./vcl/inc/pch/precompiled_vcl.hxx "make vcl.build" --find-required --verbose
+"""
+
+import sys
+import re
+import os
+import unittest
+import subprocess
+
+SILENT = True
+FIND_CONFLICTS = True
+
+IGNORE = 0
+GOOD = 1
+TEST_ON = 2
+TEST_OFF = 3
+BAD = 4
+
+def run(command):
+ try:
+ cmd = command.split(' ', 1)
+ status = subprocess.call(cmd, stdout=open(os.devnull, 'w'),
+ stderr=subprocess.STDOUT, close_fds=True)
+ return True if status == 0 else False
+ except Exception as e:
+ sys.stderr.write('Error: {}\n'.format(e))
+ return False
+
+def update_pch(filename, lines, marks):
+ with open(filename, 'w') as f:
+ for i in xrange(len(marks)):
+ mark = marks[i]
+ if mark <= TEST_ON:
+ f.write(lines[i])
+ else:
+ f.write('//' + lines[i])
+
+def log(*args, **kwargs):
+ global SILENT
+ if not SILENT:
+ print(*args, **kwargs)
+
+def bisect(lines, marks, min, max, update, command):
+ """ Disable half the includes and
+ calls the command.
+ Depending on the result,
+ recurse or return.
+ """
+ global FIND_CONFLICTS
+
+ log('Bisecting [{}, {}].'.format(min+1, max))
+ for i in range(min, max):
+ if marks[i] != IGNORE:
+ marks[i] = TEST_ON if FIND_CONFLICTS else TEST_OFF
+
+ assume_fail = False
+ if not FIND_CONFLICTS:
+ on_list = [x for x in marks if x in (TEST_ON, GOOD)]
+ assume_fail = (len(on_list) == 0)
+
+ update(lines, marks)
+ if assume_fail or not command():
+ # Failed
+ log('Failed [{}, {}].'.format(min+1, max))
+ if min >= max - 1:
+ if not FIND_CONFLICTS:
+ # Try with this one alone.
+ marks[min] = TEST_ON
+ update(lines, marks)
+ if command():
+ log(' Found @{}: {}'.format(min+1, lines[min].strip('\n')))
+ marks[min] = GOOD
+ return marks
+ else:
+ log(' Found @{}: {}'.format(min+1, lines[min].strip('\n')))
+ # Either way, this one is irrelevant.
+ marks[min] = BAD
+ return marks
+
+ # Bisect
+ for i in range(min, max):
+ if marks[i] != IGNORE:
+ marks[i] = TEST_OFF if FIND_CONFLICTS else TEST_ON
+
+ half = min + ((max - min) / 2)
+ marks = bisect(lines, marks, min, half, update, command)
+ marks = bisect(lines, marks, half, max, update, command)
+ else:
+ # Success
+ if FIND_CONFLICTS:
+ log(' Good [{}, {}].'.format(min+1, max))
+ for i in range(min, max):
+ if marks[i] != IGNORE:
+ marks[i] = GOOD
+
+ return marks
+
+def get_filename(line):
+ """ Strips the line from the
+ '#include' and angled brakets
+ and return the filename only.
+ """
+ return re.sub(r'(.*#include\s*)<(.*)>(.*)', r'\2', line)
+
+def get_marks(lines):
+ marks = []
+ min = -1
+ max = -1
+ for i in xrange(len(lines)):
+ line = lines[i]
+ if line.startswith('#include'):
+ marks.append(TEST_ON)
+ min = i if min < 0 else min
+ max = i
+ else:
+ marks.append(IGNORE)
+
+ return (marks, min, max+1)
+
+def main():
+
+ global FIND_CONFLICTS
+ global SILENT
+
+ filename = sys.argv[1]
+ command = sys.argv[2]
+
+ for i in range(3, len(sys.argv)):
+ opt = sys.argv[i]
+ if opt == '--find-conflicts':
+ FIND_CONFLICTS = True
+ elif opt == '--find-required':
+ FIND_CONFLICTS = False
+ elif opt == '--verbose':
+ SILENT = False
+ else:
+ sys.stderr.write('Error: Unknown option [{}].\n'.format(opt))
+ return 1
+
+ lines = []
+ with open(filename) as f:
+ lines = f.readlines()
+
+ (marks, min, max) = get_marks(lines)
+
+ # Test preconditions.
+ log('Validating all-excluded state...')
+ for i in range(min, max):
+ if marks[i] != IGNORE:
+ marks[i] = TEST_OFF
+ update_pch(filename, lines, marks)
+ res = run(command)
+
+ if FIND_CONFLICTS:
+ # Must build all excluded.
+ if not res:
+ sys.stderr.write("Error: broken state when all excluded, fix first and try again.")
+ return 1
+ else:
+ # If builds all excluded, we can't bisect.
+ if res:
+ sys.stderr.write("Done: in good state when all excluded, nothing to do.")
+ return 1
+
+ # Must build all included.
+ log('Validating all-included state...')
+ for i in range(min, max):
+ if marks[i] != IGNORE:
+ marks[i] = TEST_ON
+ update_pch(filename, lines, marks)
+ if not run(command):
+ sys.stderr.write("Error: broken state without modifying, fix first and try again.")
+ return 1
+
+ marks = bisect(lines, marks, min, max+1,
+ lambda l, m: update_pch(filename, l, m),
+ lambda: run(command))
+ if not FIND_CONFLICTS:
+ # Simplify further, as sometimes we can have
+ # false positives due to the benign nature
+ # of includes that are not absolutely required.
+ for i in xrange(len(marks)):
+ if marks[i] == GOOD:
+ marks[i] = TEST_OFF
+ update_pch(filename, lines, marks)
+ if not run(command):
+ # Revert.
+ marks[i] = GOOD
+ else:
+ marks[i] = BAD
+ elif marks[i] == TEST_OFF:
+ marks[i] = TEST_ON
+
+ update_pch(filename, lines, marks)
+
+ log('')
+ for i in xrange(len(marks)):
+ if marks[i] == (BAD if FIND_CONFLICTS else GOOD):
+ print("'{}',".format(get_filename(lines[i].strip('\n'))))
+
+ return 0
+
+if __name__ == '__main__':
+
+ if len(sys.argv) in (3, 4, 5):
+ status = main()
+ sys.exit(status)
+
+ print('Usage: {} <pch> <command> [--find-conflicts]|[--find-required] [--verbose]\n'.format(sys.argv[0]))
+ print(' --find-conflicts - Finds all conflicting includes. (Default)')
+ print(' Must compile without any includes.\n')
+ print(' --find-required - Finds all required includes.')
+ print(' Must compile with all includes.\n')
+ print(' --verbose - print noisy progress.')
+ print('Example: ./bin/update_pch_bisect ./vcl/inc/pch/precompiled_vcl.hxx "make vcl.build" --find-required --verbose')
+ print('\nRunning unit-tests...')
+
+
+class TestBisectConflict(unittest.TestCase):
+ TEST = """ /* Test header. */
+#include <memory>
+#include <set>
+#include <algorithm>
+#include <vector>
+/* blah blah */
+"""
+ BAD_LINE = "#include <bad>"
+
+ def setUp(self):
+ global FIND_CONFLICTS
+ FIND_CONFLICTS = True
+
+ def _update_func(self, lines, marks):
+ self.lines = []
+ for i in xrange(len(marks)):
+ mark = marks[i]
+ if mark <= TEST_ON:
+ self.lines.append(lines[i])
+ else:
+ self.lines.append('//' + lines[i])
+
+ def _test_func(self):
+ """ Command function called by bisect.
+ Returns True on Success, False on failure.
+ """
+ # If the bad line is still there, fail.
+ return self.BAD_LINE not in self.lines
+
+ def test_success(self):
+ lines = self.TEST.split('\n')
+ (marks, min, max) = get_marks(lines)
+ marks = bisect(lines, marks, min, max,
+ lambda l, m: self._update_func(l, m),
+ lambda: self._test_func())
+ self.assertTrue(BAD not in marks)
+
+ def test_conflict(self):
+ lines = self.TEST.split('\n')
+ for pos in xrange(len(lines) + 1):
+ lines = self.TEST.split('\n')
+ lines.insert(pos, self.BAD_LINE)
+ (marks, min, max) = get_marks(lines)
+
+ marks = bisect(lines, marks, min, max,
+ lambda l, m: self._update_func(l, m),
+ lambda: self._test_func())
+ for i in xrange(len(marks)):
+ if i == pos:
+ self.assertEqual(BAD, marks[i])
+ else:
+ self.assertNotEqual(BAD, marks[i])
+
+class TestBisectRequired(unittest.TestCase):
+ TEST = """#include <algorithm>
+#include <set>
+#include <map>
+#include <vector>
+"""
+ REQ_LINE = "#include <req>"
+
+ def setUp(self):
+ global FIND_CONFLICTS
+ FIND_CONFLICTS = False
+
+ def _update_func(self, lines, marks):
+ self.lines = []
+ for i in xrange(len(marks)):
+ mark = marks[i]
+ if mark <= TEST_ON:
+ self.lines.append(lines[i])
+ else:
+ self.lines.append('//' + lines[i])
+
+ def _test_func(self):
+ """ Command function called by bisect.
+ Returns True on Success, False on failure.
+ """
+ # If the required line is not there, fail.
+ found = self.REQ_LINE in self.lines
+ return found
+
+ def test_success(self):
+ lines = self.TEST.split('\n')
+ (marks, min, max) = get_marks(lines)
+ marks = bisect(lines, marks, min, max,
+ lambda l, m: self._update_func(l, m),
+ lambda: self._test_func())
+ self.assertTrue(GOOD not in marks)
+
+ def test_required(self):
+ lines = self.TEST.split('\n')
+ for pos in xrange(len(lines) + 1):
+ lines = self.TEST.split('\n')
+ lines.insert(pos, self.REQ_LINE)
+ (marks, min, max) = get_marks(lines)
+
+ marks = bisect(lines, marks, min, max,
+ lambda l, m: self._update_func(l, m),
+ lambda: self._test_func())
+ for i in xrange(len(marks)):
+ if i == pos:
+ self.assertEqual(GOOD, marks[i])
+ else:
+ self.assertNotEqual(GOOD, marks[i])
+
+unittest.main()
+
+# vim: set et sw=4 ts=4 expandtab:
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-24 16:20:04 +0000