+:PROPERTIES:
+:ID: bb4f96cd-458c-495b-a605-313b2e3e28d2
+:END:
#+TITLE: CLI Helper - library to help implementing commandline interfaces
* General
- See [[https://www3.svjatoslav.eu/projects/cli-helper/apidocs/][JavaDoc]]
* Library contents
+:PROPERTIES:
+:ID: fef7ebc3-0f00-4b82-a926-c0cfdf709762
+:END:
- See also: [[https://www3.svjatoslav.eu/projects/svjatoslav_commons/apidocs/][CLI Helper JavaDoc]].
This library is a collection of command-line interface (CLI) helper
such as:
- [[id:4fca35e4-fdf1-4675-a36f-6206d6fb72cb][Asking for user input]]
-- Handling application command-line arguments
-
+- [[id:46115263-ed3d-4acc-9ec5-523d7acf87b8][Commandline interface arguments processing]]
** Ask for user input
:PROPERTIES:
- askLong() :: Asks the user to enter an integer.
- askString() :: Asks the user to enter a string.
-** Command-line application CLI arguments processing
-*** Theory
-**** Commands and Arguments
-
-Every command-line application has a way of receiving input from
-users, usually in the form of command-line arguments. A command-line
-argument is a piece of information provided to the command-line
-application when it's invoked. These arguments are provided as an
-array of strings. The first element of the array (argument 0) is
-typically the name of the command itself.
-
-In the example below, 'my-video-coder' is our command, and the rest
-are arguments:
-
-#+BEGIN_SRC shell
-my-video-coder encode --input vid1.mp4 vid2.mp4 vid3.mp4 --quality 5
-#+END_SRC
-
-To better understand how these concepts work together, let's break
-down our example command:
-
-| argument # | type | values |
-|------------+------------------------+----------------------------|
-| 0 | command | my-video-coder |
-| 1 | subcommand | encode |
-| 2 | option1 | --input |
-| 3, 4, 5 | parameters for option1 | vid1.mp4 vid2.mp4 vid3.mp4 |
-| 6 | option2 | --quality |
-| 7 | parameters for option2 | 5 |
-
-**** Options
-
-Options are arguments that change the behavior of a command. They
-usually start with a dash (-) or double dash (--). For instance,
-'--input' and '--quality' are options in our example command.
-
-**** Parameters
-
-A parameter provides additional information to a command or
-option. For instance, 'vid1.mp4 vid2.mp4 vid3.mp4' are parameters for
-the '--input' option, and '5' is a parameter for the '--quality'
-option in our example command.
-
-**** Positional Parameters
-
-These are the arguments that follow the command and are usually
-required for the command to execute. In our example, 'encode' is a
-positional parameter.
-
-**** Subcommands
-
-Subcommands are more specific actions that a command can perform. They
-are often used with commands that have multiple functions. In our
-example, 'encode' is a subcommand of 'my-video-coder'.
-
-*** Implementation
-
-Parsing Command-line Arguments:
-- `Parameter` class is used for defining parameters with their
- descriptions, types, and aliases. It also keeps track of whether the
- specific parameter was present in the command line or not. This
- information is used later in the processing.
-
- - `DirectoryParameter`, `FileParameter`, `IntegerParameter`,
- `StringParameter`, `NullParameter`, and `StringParameters` are
- examples of Parameter classes, each one having unique
- characteristics for handling specific types of parameters
- (directories, files, integers, strings, etc.).
-
-- `ArgumentCount` class determines if a parameter can have any amount
- of arguments (MULTI), exactly one argument (SINGLE), or no arguments
- (NONE).
-
-- `Parser` class takes all these parameters and checks whether all
- required arguments are provided and if they match the expected
- format.
-
-**** Usage example
-
-TODO:
-
* Getting the library
Instructions to embed svjatoslav-commons library in your project:
projects / cli-helper.git / blobdiff