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Selectively append changes to exported config files #10118

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Merged
merged 1 commit into from
Mar 17, 2019
Merged

Selectively append changes to exported config files #10118

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10 changes: 6 additions & 4 deletions tools/export/exporters.py
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Original file line number Diff line number Diff line change
Expand Up @@ -206,15 +206,17 @@ def gen_file(self, template_file, data, target_file, **kwargs):
self.generated_files += [target_path]

def gen_file_nonoverwrite(self, template_file, data, target_file, **kwargs):
"""Generates a project file from a template using jinja"""
"""Generates or selectively appends a project file from a template"""
target_text = self._gen_file_inner(template_file, data, target_file, **kwargs)
target_path = self.gen_file_dest(target_file)
if exists(target_path):
with open(target_path) as fdin:
old_text = fdin.read()
if target_text not in old_text:
old_lines_set = set(fdin.read().splitlines())
target_set = set(target_text.splitlines())
to_append = target_set - old_lines_set
if len(to_append) > 0:
with open(target_path, "a") as fdout:
fdout.write(target_text)
fdout.write("\n".join(to_append))
else:
logging.debug("Generating: %s", target_path)
open(target_path, "w").write(target_text)
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