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Commit0a8b2c5

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upgrade_pythoncapi: try to preserve newlines when patching (#141)
In case we use \n on Windows or \r\n on Linux we don't wantpatching those files change every line due to newlines beingadjusted to the platform defaults.Instead pass 'newline=""' to all open() calls to preservenewlines. And when adding new lines use the first type ofnewline found in the file.The test changes make the patching code reuseable and addsa second test with multiple different newlines in the input.
1 parent3082742 commit0a8b2c5

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2 files changed

+55
-34
lines changed

2 files changed

+55
-34
lines changed

‎tests/test_upgrade_pythoncapi.py‎

Lines changed: 47 additions & 30 deletions
Original file line numberDiff line numberDiff line change
@@ -43,33 +43,12 @@ def reformat(source):
4343
classTests(unittest.TestCase):
4444
maxDiff=80*30
4545

46-
def_test_patch_file(self,tmp_dir):
47-
# test Patcher.patcher()
48-
source="""
49-
PyTypeObject*
50-
test_type(PyObject *obj, PyTypeObject *type)
51-
{
52-
Py_TYPE(obj) = type;
53-
return Py_TYPE(obj);
54-
}
55-
"""
56-
expected="""
57-
#include "pythoncapi_compat.h"
58-
59-
PyTypeObject*
60-
test_type(PyObject *obj, PyTypeObject *type)
61-
{
62-
Py_SET_TYPE(obj, type);
63-
return Py_TYPE(obj);
64-
}
65-
"""
66-
source=reformat(source)
67-
expected=reformat(expected)
68-
46+
def_patch_file(self,source,tmp_dir=None):
47+
# test Patcher.patcher()
6948
filename=tempfile.mktemp(suffix='.c',dir=tmp_dir)
7049
old_filename=filename+".old"
7150
try:
72-
withopen(filename,"w",encoding="utf-8")asfp:
51+
withopen(filename,"w",encoding="utf-8",newline="")asfp:
7352
fp.write(source)
7453

7554
old_stderr=sys.stderr
@@ -93,10 +72,10 @@ def _test_patch_file(self, tmp_dir):
9372
sys.stderr=old_stderr
9473
sys.argv=old_argv
9574

96-
withopen(filename,encoding="utf-8")asfp:
75+
withopen(filename,encoding="utf-8",newline="")asfp:
9776
new_contents=fp.read()
9877

99-
withopen(old_filename,encoding="utf-8")asfp:
78+
withopen(old_filename,encoding="utf-8",newline="")asfp:
10079
old_contents=fp.read()
10180
finally:
10281
try:
@@ -108,15 +87,53 @@ def _test_patch_file(self, tmp_dir):
10887
exceptFileNotFoundError:
10988
pass
11089

111-
self.assertEqual(new_contents,expected)
11290
self.assertEqual(old_contents,source)
91+
returnnew_contents
11392

11493
deftest_patch_file(self):
115-
self._test_patch_file(None)
94+
source="""
95+
PyTypeObject*
96+
test_type(PyObject *obj, PyTypeObject *type)
97+
{
98+
Py_TYPE(obj) = type;
99+
return Py_TYPE(obj);
100+
}
101+
"""
102+
expected="""
103+
#include "pythoncapi_compat.h"
104+
105+
PyTypeObject*
106+
test_type(PyObject *obj, PyTypeObject *type)
107+
{
108+
Py_SET_TYPE(obj, type);
109+
return Py_TYPE(obj);
110+
}
111+
"""
112+
source=reformat(source)
113+
expected=reformat(expected)
114+
115+
new_contents=self._patch_file(source)
116+
self.assertEqual(new_contents,expected)
116117

117-
deftest_patch_directory(self):
118118
withtempfile.TemporaryDirectory()astmp_dir:
119-
self._test_patch_file(tmp_dir)
119+
new_contents=self._patch_file(source,tmp_dir)
120+
self.assertEqual(new_contents,expected)
121+
122+
deftest_patch_file_preserve_newlines(self):
123+
source="""
124+
Py_ssize_t get_size(PyVarObject *obj)\r\n\
125+
\n\
126+
{ return obj->ob_size; }\r\
127+
"""
128+
expected="""
129+
Py_ssize_t get_size(PyVarObject *obj)\r\n\
130+
\n\
131+
{ return Py_SIZE(obj); }\r\
132+
"""
133+
source=reformat(source)
134+
expected=reformat(expected)
135+
new_contents=self._patch_file(source)
136+
self.assertEqual(new_contents,expected)
120137

121138
defcheck_replace(self,source,expected,**kwargs):
122139
source=reformat(source)

‎upgrade_pythoncapi.py‎

Lines changed: 8 additions & 4 deletions
Original file line numberDiff line numberDiff line change
@@ -554,13 +554,17 @@ def _get_operations(self, parser):
554554
returnoperations
555555

556556
defadd_line(self,content,line):
557-
line=line+'\n'
557+
# Use the first matching newline
558+
match=re.search(r'(?:\r\n|\n|\r)',content)
559+
newline=match.group(0)ifmatchelse'\n'
560+
561+
line=line+newline
558562
# FIXME: tolerate trailing spaces
559563
iflinenotincontent:
560564
# FIXME: add macro after the first header comment
561565
# FIXME: add macro after includes
562566
# FIXME: add macro after: #define PY_SSIZE_T_CLEAN
563-
returnline+'\n'+content
567+
returnline+newline+content
564568
else:
565569
returncontent
566570

@@ -601,7 +605,7 @@ def patch_file(self, filename):
601605
encoding="utf-8"
602606
errors="surrogateescape"
603607

604-
withopen(filename,encoding=encoding,errors=errors)asfp:
608+
withopen(filename,encoding=encoding,errors=errors,newline="")asfp:
605609
old_contents=fp.read()
606610

607611
new_contents,operations=self._patch(old_contents)
@@ -620,7 +624,7 @@ def patch_file(self, filename):
620624
# If old_filename already exists, replace it
621625
os.replace(filename,old_filename)
622626

623-
withopen(filename,"w",encoding=encoding,errors=errors)asfp:
627+
withopen(filename,"w",encoding=encoding,errors=errors,newline="")asfp:
624628
fp.write(new_contents)
625629

626630
self.applied_operations|=set(operations)

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