Parser for command line arguments

argparse is a flexible utility for D programming language to parse command line arguments.

Features

• Positional arguments:
  • Automatic type conversion of the value.
  • Required by default, can be marked as optional.
• Named arguments:
  • Multiple names are supported, including short (-v) and long (--verbose) ones.
  • Case-sensitive/-insensitive parsing.
  • Bundling of short names (-vvv is same as -v -v -v).
  • Equals sign is accepted (-v=debug, --verbose=debug).
  • Automatic type conversion of the value.
  • Optional by default, can be marked as required.
• Support different types of destination data member:
  • Scalar (e.g., int, float, bool).
  • String arguments.
  • Enum arguments.
  • Array arguments.
  • Hash (associative array) arguments.
  • Callbacks.
• Different workflows are supported:
  • Mixin to inject standard main function.
  • Parsing of known arguments only (returning not recognized ones).
  • Enforcing that there are no unknown arguments provided.
• Shell completion.
• Options terminator (e.g., parsing up to -- leaving any argument specified after it).
• Arguments groups.
• Subcommands.
• Fully customizable parsing:
  • Raw (string) data validation (i.e., before parsing).
  • Custom conversion of argument value (string -> any destination type).
  • Validation of parsed data (i.e., after conversion to destination type).
  • Custom action on parsed data (doing something different from storing the parsed value in a member of destination object).
• ANSI colors and styles.
• Built-in reporting of error happened during argument parsing.
• Built-in help generation.

Documentation

Please find up-to-date documentation here.