See README.md

left_truncate_llvm_cov_html_pathnames.md

Left truncate on long pathnames in an llvm-cov HTML report.

Usage: $0 report_root_path source_starts_at_dir

For example the absolute, root path to a file.

/Long/pathname/that/eventually/gets/to/Source/app/module/something.ext

Will left truncate with a leading elipsis:

.../Source/app/module/something.ext

left_truncate_llvm_cov_html_pathnames.py

#!/usr/bin/env python3

import os
import sys

def modify_html_report(file_path, source_starts_at_dir):
    with open(file_path, 'r') as file:
        content = file.read()

    start_tag = "<div class='source-name-title'><pre>"
    end_tag = '</pre></div>'
    start_index = content.find(start_tag)
    end_index = content.find(end_tag, start_index)
    
    while start_index != -1 and end_index != -1:
        original_path = content[start_index + len(start_tag):end_index].strip()

        if original_path.find(source_starts_at_dir) != -1:
            print(f"found: {original_path}")
            modified_path = original_path.split(f'/{source_starts_at_dir}/')[-1]

            replacement = f".../{source_starts_at_dir}/{modified_path}"
            print(f"modified to: {replacement}")
            content = content[:start_index + len(start_tag)] + replacement + content[end_index:]
            start_index = content.find(start_tag, start_index + len(replacement))
            end_index = content.find(end_tag, start_index)

            with open(file_path, 'w') as file:
                file.write(content)
        else:
            print(f"No replacement in: {file_path}")

def main():
    if len(sys.argv) != 3:
        print("Usage: {} <reports_root_path> <source_starts_at_dir>".format(sys.argv[0]))
        sys.exit(1)

    reports_root = sys.argv[1]
    source_starts_at_dir = sys.argv[2]

    for root, _, files in os.walk(reports_root):
        for file in files:
            if file.endswith('.html'):
                print(f"Checking: {file}")
                file_path = os.path.join(root, file)
                modify_html_report(file_path, source_starts_at_dir)

if __name__ == "__main__":
    main()