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import inspect
import os
import shutil
import subprocess
from ctypes import util
class CustomPopen(subprocess.Popen):
def __init__(self, *args, **kwargs):
print(f"Subprocess command:\n {' '.join(args[0])}")
super().__init__(*args, **kwargs)
def communicate(self, *args, **kwargs):
out, _ = super().communicate(*args, **kwargs)
out = out.rstrip()
print("Subprocess output:")
if out:
print(f" {os.fsdecode(out)}")
else:
print(f" Output is empty")
return out, _
def __getattribute__(self, name_):
att = super().__getattribute__(name_)
if name_ == "stdout" and att is not None:
att.read = self.read_wrapper(att.read)
return att
@staticmethod
def read_wrapper(func):
if func.__name__ == "wrapper":
return func
def wrapper(*args, **kwargs):
output = func(*args, **kwargs)
print("Subprocess output:")
for line_ in os.fsdecode(output).split("\n"):
print(line_)
return output
return wrapper
subprocess.Popen = CustomPopen
print("ctypes.util script with the find_library:")
print(inspect.getsourcefile(util.find_library), end="\n\n")
print("find_library function:")
func_lines = list(map(str.rstrip, inspect.getsourcelines(util.find_library)[0]))
indent = len(func_lines[0]) - len(func_lines[0].lstrip())
for line in func_lines:
print(line.replace(" " * indent, "", 1))
library_names = ("cairo-2", "cairo", "libcairo-2")
filenames = ("libcairo.so.2", "libcairo.2.dylib", "libcairo-2.dll")
c_compiler = shutil.which("gcc") or shutil.which("cc")
ld_env = os.environ.get("LD_LIBRARY_PATH")
first_found = ""
print("\nLD_LIBRARY_PATH =", ld_env, end="\n\n")
for name in library_names:
if hasattr(util, "_findSoname_ldconfig"):
result = util._findSoname_ldconfig(name)
print(f"_findSoname_ldconfig({name}) ->", result)
if result:
print(f"Found {result}")
if not first_found:
first_found = result
print("---")
if c_compiler and hasattr(util, "_findLib_gcc"):
result = util._findLib_gcc(name)
print(f"_findLib_gcc({name}) ->", result)
if result and hasattr(util, "_get_soname"):
result = util._get_soname(result)
if result:
print(f"Found {result}")
if not first_found:
first_found = result
print("---")
if hasattr(util, "_findLib_ld"):
result = util._findLib_ld(name)
print(f"_findLib_ld({name}) ->", result)
if result and hasattr(util, "_get_soname"):
result = util._get_soname(result)
if result:
print(f"Found {result}")
if not first_found:
first_found = result
print("---")
if hasattr(util, "_findLib_crle"):
result = util._findLib_crle(name, False)
print(f"_findLib_crle({name}) ->", result)
if result and hasattr(util, "_get_soname"):
result = util._get_soname(result)
if result:
print(f"Found {result}")
if not first_found:
first_found = result
print("---")
if first_found:
filenames = (first_found,) + filenames
print(f"The path is {first_found or 'not found'}")
print("List of files that FFI will try to load:")
for filename in filenames:
print("-", filename)
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