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Issue #13930: Adds ability for 2to3 to write its output to a different

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directory tree instead of overwriting the input files.  Adds three command
line options: -o/--output-dir, -W/--write-unchanged-files and --add-suffix.
This commit is contained in:
Gregory P. Smith 2012-02-12 15:56:49 -08:00
commit db66310e8f
6 changed files with 274 additions and 14 deletions
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20
Lib/lib2to3/refactor.py
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@ -173,7 +173,8 @@ class FixerError(Exception):
class RefactoringTool(object):
_default_options = {"print_function" : False}
_default_options = {"print_function" : False,
"write_unchanged_files" : False}
CLASS_PREFIX = "Fix" # The prefix for fixer classes
FILE_PREFIX = "fix_" # The prefix for modules with a fixer within
@ -195,6 +196,10 @@ def __init__(self, fixer_names, options=None, explicit=None):
self.grammar = pygram.python_grammar_no_print_statement
else:
self.grammar = pygram.python_grammar
# When this is True, the refactor*() methods will call write_file() for
# files processed even if they were not changed during refactoring. If
# and only if the refactor method's write parameter was True.
self.write_unchanged_files = self.options.get("write_unchanged_files")
self.errors = []
self.logger = logging.getLogger("RefactoringTool")
self.fixer_log = []
@ -341,13 +346,13 @@ def refactor_file(self, filename, write=False, doctests_only=False):
if doctests_only:
self.log_debug("Refactoring doctests in %s", filename)
output = self.refactor_docstring(input, filename)
if output != input:
if self.write_unchanged_files or output != input:
self.processed_file(output, filename, input, write, encoding)
else:
self.log_debug("No doctest changes in %s", filename)
else:
tree = self.refactor_string(input, filename)
if tree and tree.was_changed:
if self.write_unchanged_files or (tree and tree.was_changed):
# The [:-1] is to take off the \n we added earlier
self.processed_file(str(tree)[:-1], filename,
write=write, encoding=encoding)
@ -386,13 +391,13 @@ def refactor_stdin(self, doctests_only=False):
if doctests_only:
self.log_debug("Refactoring doctests in stdin")
output = self.refactor_docstring(input, "<stdin>")
if output != input:
if self.write_unchanged_files or output != input:
self.processed_file(output, "<stdin>", input)
else:
self.log_debug("No doctest changes in stdin")
else:
tree = self.refactor_string(input, "<stdin>")
if tree and tree.was_changed:
if self.write_unchanged_files or (tree and tree.was_changed):
self.processed_file(str(tree), "<stdin>", input)
else:
self.log_debug("No changes in stdin")
@ -502,7 +507,7 @@ def traverse_by(self, fixers, traversal):
def processed_file(self, new_text, filename, old_text=None, write=False,
encoding=None):
"""
Called when a file has been refactored, and there are changes.
Called when a file has been refactored and there may be changes.
"""
self.files.append(filename)
if old_text is None:
@ -513,7 +518,8 @@ def processed_file(self, new_text, filename, old_text=None, write=False,
self.print_output(old_text, new_text, filename, equal)
if equal:
self.log_debug("No changes to %s", filename)
return
if not self.write_unchanged_files:
return
if write:
self.write_file(new_text, filename, old_text, encoding)
else: