Function get_lockfile_url_from_makefile

tools/create_lockfile_diff.py:42–110

Get the PYODIDE_PREBUILT_PACKAGES_LOCKFILE URL from the Makefile. Args: branch: If provided, get the URL from this git branch. If None, use the current branch. Returns: The URL to the lockfile.

(branch: str | None = None)

def get_lockfile_url_from_makefile(branch: str | None = None) -> str:
    """
    Get the PYODIDE_PREBUILT_PACKAGES_LOCKFILE URL from the Makefile.

    Args:
        branch: If provided, get the URL from this git branch. If None, use the current branch.

    Returns:
        The URL to the lockfile.
    """
    if branch:
        # Get the Makefile.envs content from the specified branch
        result = subprocess.run(
            ["git", "show", f"{branch}:Makefile.envs"],
            capture_output=True,
            text=True,
            check=True,
        )
        makefile_content = result.stdout

        # First pass: collect all variable definitions
        variables = {}
        for line in makefile_content.split("\n"):
            line = line.strip()
            if line.startswith("export ") and "=" in line:
                # Remove 'export ' prefix and split on first '='
                var_line = line[7:]  # Remove 'export '
                var_name, var_value = var_line.split("=", 1)
                variables[var_name.strip()] = var_value.strip()

        # Second pass: resolve variable references
        import re

        max_iterations = 10  # Prevent infinite loops
        for _ in range(max_iterations):
            changed = False
            for var_name, var_value in list(variables.items()):
                for match in re.finditer(r"\$\(([^)]+)\)", var_value):
                    ref_var = match.group(1)
                    if ref_var in variables:
                        new_value = var_value.replace(
                            match.group(0), variables[ref_var]
                        )
                        if new_value != var_value:
                            variables[var_name] = new_value
                            changed = True
            if not changed:
                break

        if "PYODIDE_PREBUILT_PACKAGES_LOCKFILE" not in variables:
            raise ValueError(
                f"Could not find PYODIDE_PREBUILT_PACKAGES_LOCKFILE in {branch} branch"
            )

        return variables["PYODIDE_PREBUILT_PACKAGES_LOCKFILE"]
    else:
        # Get the URL from the current branch using make env
        result = subprocess.run(