Crate dia_args

A command line parser

Project

• License: GNU Lesser General Public License, either version 3, or (at your option) any later version.
• This project follows Semantic Versioning 2.0.0

Features

• No debts: no dependencies. It’s an argument parser, so standard Rust is enough.
• There’s a specification (below). It has a separate version, not same as the library’s.
• parse_file() helps parse arguments stored in your file.
• docs helps make documentation for your program.
• Optional bin feature provides a program which helps you generate simple Rust source code templates. You can run the program with help command for more details.

Specification 0.0.1

A program argument can be:

• A command.
• An argument.
• An option.
• Two special phrases: - and --.

1. Commands

   • A command can be anything which does not start with either - or --.

2. Arguments

   • Same as a command, an argument can be anything which does not start with either - or --.

3. Options

   An option starts with - or --.

   • - supports either:

     • A single short format option.
     • Or multiple short format boolean options.

   • -- supports a single long format option.

   • Option values can be anything.

   • An option’s key and value can be separated by either:

     • An equals sign =.
     • Or mutiple white spaces.

   • A boolean option has 2 values: true and false. The value is optional. If absent, true will be assigned.

4. Special phrases

   • - means: the program should process standard input.
   • -- means: the program should process all phrases after it as arguments. This is normally used to pass arguments to sub process.

5. Passing arguments to a program

   Must be in this form:

   program [command|arguments...|options...|-] [-- [arguments...]]
   

   in which:

   • [] means optional.
   • ... means multiple arguments.

Modules

• docs
  Kit for documentation
• licenses
  Licenses
• paths
  Extensions for Args
• version_info
  0.59.6 (October 11th, 2023)

Macros

• make_cmds
  Makes a vector of Cow<'_, Cmd<'_>> from a list of either Cmd or &Cmd
• make_options
  Makes a vector of Cow<'_, Option<'_>> from a list of either Option or &Option

Structs

• Args
  Arguments

Enums

• Answer
  Answer
• MergeOption
  Merge option

Constants

• CODE_NAME
  Crate code name
• DIA_ARGS_FILE_FORMAT
  Description of argument file format, in English
• DIA_ARGS_FILE_NAME
  Default file name for storing arguments: .dia-args
• FALSE_AS_STR
  false as string
• ID
  ID of this crate
• MAX_DIA_ARGS_FILE_SIZE
  Maximum size allowed for argument file to be parsed (3 MiB)
• NAME
  Crate name
• RELEASE_DATE
  Crate release date (year/month/day)
• TAG
  Tag, which can be used for logging…
• TRUE_AS_STR
  true as string
• VERSION
  Crate version

Functions

• ask_user
  Asks user some question
• lock_write_err
  Locks stderr and writes to it
• lock_write_out
  Locks stdout and writes to it
• parse
  Parses from process’ arguments
• parse_file
  Parses from file
• parse_stream
  Parses a stream of strings, separated by null byte (0)
• parse_strings
  Parses from an iterator of strings
• read_line
  Reads a line from stdin, trims and converts it to T

Type Aliases

• Result
  Result type used in this crate