File Handles Not Properly Closed In mkconcore.py

[saksham-gera]

There are 60 instances where files are opened, but they may not be properly closed, especially in error cases.

Elaborate Descripion:

The existing implementation for opening and copying files in Concore lacks proper exception handling and resource management. If an exception occurs after opening the file, it may remain open, leading to resource leaks. Additionally, failure cases are not well handled, making debugging difficult.

Existing Implementation (Example):

try:
    if concoretype=="docker":
        fsource = open(CONCOREPATH+"/concoredocker.hpp")
    else:
        fsource = open(CONCOREPATH+"/concore.hpp")
except:
    print(CONCOREPATH+" is not correct path to concore")
    quit()
with open(outdir+"/src/concore.hpp","w") as fcopy:
    fcopy.write(fsource.read())
fsource.close()

Issues with the Existing Code:

• Unclosed File on Exception: If open(CONCOREPATH + "..." ) fails, fsource is not defined, but quit() is called directly without handling errors correctly.
• No Specific Exception Handling: A general except: block is used, which can hide useful error messages.
• Manual File Closing: The file fsource is closed manually, which is prone to errors if an exception occurs before reaching fsource.close().

Proposed Solution (Corrected Code):

try:
    file_path = CONCOREPATH + ("/concoredocker.hpp" if concoretype == "docker" else "/concore.hpp")
    with open(file_path, "r") as fsource, open(outdir + "/src/concore.hpp", "w") as fcopy:
        fcopy.write(fsource.read())
except FileNotFoundError:
    print(CONCOREPATH + " is not a correct path to concore")
    quit()
except Exception as e:
    print("Error:", e)
    quit()

Improvements in the Proposed Solution:

1. Uses with open(...) for Proper Resource Management: Ensures the file is automatically closed when it goes out of scope.
2. Better Error Handling:

• FileNotFoundError: Specifically handles missing files.
• Exception as e: Captures other errors for debugging.

3. Simplifies Code: Reduces unnecessary manual file handling and makes the logic clearer.

Conclusion:
The proposed solution improves reliability, prevents resource leaks, and ensures proper error handling, making the file handling process in Concore more robust.

[saksham-gera]

@pradeeban Do Let Me Know If you find this relevant, I'll fix it