Struct Config 

pub struct Config {
    pub num_threads: usize,
    pub num_entries: usize,
    pub batch_size: usize,
    pub root_path: PathBuf,
    pub skip_dirs: HashSet<String>,
    pub max_open_files: usize,
    pub verbose: bool,
}

Configuration structure containing runtime settings.

Fields

• num_threads - Number of threads to use in parallel processing
• num_entries - Number of entries to output at program completion
• batch_size - Size of batches for processing file metadata
• root_path - Base directory path to recursively find and size files
• skip_dirs - Set of directory names to exclude from the search
• max_open_files - Maximum number of open file handles used by this program
• verbose - Bool to determine if errors collected during runtime will be printed

Fields

num_threads: usize

num_entries: usize

batch_size: usize

root_path: PathBuf

skip_dirs: HashSet<String>

max_open_files: usize

verbose: bool

Implementations

impl Config

pub fn build(args: &Args) -> Result<Config, Box<dyn Error>>

Builds a new Config instance from provided command line arguments.

Parameters

• args - Reference to Args structure containing command line arguments

Returns

• Result<Config, Box<dyn Error>> - New Config instance or error if construction fails

Details

This function performs the following setup:

1. Configures parallel processing based on available CPU cores
2. Calls a library function to determine platform specific cap on open file descriptors
3. Sets number of entries to output equal to provided command line arg or default of 10
4. Sets batch size to match command line arg if specified or else default to 1000
5. Sets verbose bool to match command line arg
6. Sets up the root directory path for operations
7. Loads directory exclusion rules if file containing dirs was supplied

Errors

Returns an error if:

• Current directory cannot be determined when no target directory is specified
• Exclusion file cannot be opened or read
• Thread pool configuration fails (logged as error but doesn’t halt execution)

Trait Implementations

impl Clone for Config

fn clone(&self) -> Config

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.