mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2025-11-04 05:17:07 +00:00
b7f3bfc559
- Can be used to generate the substitution values we currently use for the various target related .def files. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144345 91177308-0d34-0410-b5e6-96231b3b80d8
67 lines
2.0 KiB
Python
67 lines
2.0 KiB
Python
"""
|
|
Defines utilities useful for performing standard "configuration" style tasks.
|
|
"""
|
|
|
|
import re
|
|
import os
|
|
|
|
def configure_file(input_path, output_path, substitutions):
|
|
"""configure_file(input_path, output_path, substitutions) -> bool
|
|
|
|
Given an input and output path, "configure" the file at the given input path
|
|
by replacing variables in the file with those given in the substitutions
|
|
list. Returns true if the output file was written.
|
|
|
|
The substitutions list should be given as a list of tuples (regex string,
|
|
replacement), where the regex and replacement will be used as in 're.sub' to
|
|
execute the variable replacement.
|
|
|
|
The output path's parent directory need not exist (it will be created).
|
|
|
|
If the output path does exist and the configured data is not different than
|
|
it's current contents, the output file will not be modified. This is
|
|
designed to limit the impact of configured files on build dependencies.
|
|
"""
|
|
|
|
# Read in the input data.
|
|
f = open(input_path, "rb")
|
|
try:
|
|
data = f.read()
|
|
finally:
|
|
f.close()
|
|
|
|
# Perform the substitutions.
|
|
for regex_string,replacement in substitutions:
|
|
regex = re.compile(regex_string)
|
|
data = regex.sub(replacement, data)
|
|
|
|
# Ensure the output parent directory exists.
|
|
output_parent_path = os.path.dirname(os.path.abspath(output_path))
|
|
if not os.path.exists(output_parent_path):
|
|
os.makedirs(output_parent_path)
|
|
|
|
# If the output path exists, load it and compare to the configured contents.
|
|
if os.path.exists(output_path):
|
|
current_data = None
|
|
try:
|
|
f = open(output_path, "rb")
|
|
try:
|
|
current_data = f.read()
|
|
except:
|
|
current_data = None
|
|
f.close()
|
|
except:
|
|
current_data = None
|
|
|
|
if current_data is not None and current_data == data:
|
|
return False
|
|
|
|
# Write the output contents.
|
|
f = open(output_path, "wb")
|
|
try:
|
|
f.write(data)
|
|
finally:
|
|
f.close()
|
|
|
|
return True
|