10 releases
0.1.0 | Oct 14, 2024 |
---|---|
0.0.10 | Oct 13, 2024 |
0.0.6 | May 25, 2024 |
0.0.4 | Jul 20, 2023 |
0.0.2 | May 25, 2023 |
#559 in Parser implementations
783 downloads per month
33KB
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FLI
A library for creating command line apps in rust inspired by the like of commander.js
NOTE: Check out sample code
Changes
For stable changes check the CHANGELOG.md file
For unstable changes check the CHANGELOG.md file
use fli::{Fli, init_from_toml};
fn main(){
let mut app : Fli = init_from_toml!(); // using the toml file
app.option("-n --name, <>", "Name to call you", |x : &Fli| {});
app.option("-g --greet", "greeting", |x : &Fli| {
match x.get_values("name".to_owned() /* passing (--name, -n or n) would work*/){
Ok(value) => {
println!("Good day {?}", value[0])
},
Err(_) => {},
}
});
// required for the app to work
app.run();
}
then run it like this
$ cargo run -- -g -n james
Good day james
Getting started
Installtion
cargo add fli
OR
[dependencies]
fli = "0.0.5"
Import
extern crate fli;
use fli::Fli;
fn main(){
println!("Happy Coding");
}
Create an App Instance
fn main(){
let mut app = init_from_toml!(); // to init from your cargo.toml file
}
OR
fn main(){
let mut app = Fli::init("app-name", "an app description");
app.set_version("0.0.1");
}
Adding Options
fn main(){
let mut app = init_from_toml!();
app.option("-g --greet", "to make a greeting", greet);
app.option("-n --name, <>", "to set your name", |x|{});
}
// callback for the greet param
fn greet(x: &Fli){
match x.get_values("--name".to_owned()){
Ok(option) => {
println!("Good day {?}", v[0]);
},
Err(_) => {},
}
}
Run your app
fn main(){
//... other code
app.run();
}
Adding a new Command Set
You can also add a new command set using the command method
fn main(){
let mut app = init_from_toml!();
app.command("greet", "An app that respects")
.default(greet)
.allow_inital_no_param_values(false)
.option("-n --name, <>", "To print your name along side", greet)
.option("-t --time, []", "For time based Greeting", greet);
app.run();
}
fn greet(x){ /*code to greet "*/ }
Then you would run the command like this
$ cargo run -- greet -n "codad5"
> Hello Codad5
Doing it in a procedual way
Like commander.js you can also do it in a procedual way
use fli::Fli;
fn main(){
// doing it procedual way
let mut app = init_from_toml!();
let moveCommand = app.command("move", "move files");
// the [...] means accept optional multiple
moveCommand.option("-p --path, <...>", "path to files to be moved", move_file);
app.option("-g --greet", "to make a greeting", |x|{});
app.option("-n --name, <>", "to set your name", |x|{});
app.run();
if app.is_passed("--greet"){
if app.has_a_value("-n"){/* greet person with name*/}
else { /* freet without name*/ }
}
}
Explaining all app : Fli
methods
Note:
All
app : Fli
methods are avaliable asapp : &Fli
methods
-
app.option(arg_and_data, callback)
: This method takes in 2 param- First
arg_and_data
: This is a format template of how the avaliable arguments for a command would be being in a format-a --arg
or-a --arg, data
where-a
is the short form of the argument and--arg
is the long form of the argument.--data
is the acceptable data type and it is seperated by a comma,
, if not passed then the arg does not need a data type
symbol meaning [] This means it needs one optional data <> This means it needs one required data [...] This means it can take in many optional data <...> This means it needs at least one data, can take more - First
-
app.commad(command_name)
: This is to create a new command with its own option and param like -
app.default(callback)
: The default callback incase no args or command is being passed but ano_param_value
is being passed -
app.allow_duplicate_callback(bool)
: To prevent duplicate callbacks as a result of same callback of anarg
or as a result of thearg
been passed multiple times- True : Turns it on i.e the code below would work fine
$ myapp "some ran value"
-
app.allow_inital_no_param_values(bool)
: This is to allow values to a command with no params -
app.run()
(!important) : To run the app , -
app.has_a_value(arg_flag)
: Check if an arg has a value -
app.get_values(arg_flag)
: get the value(s) of an expect required param, this returns aResult
Type with a vector of string as the Ok valueVec<String>
and&str
as the error value
NOTE the method
get_values
would return theErr
Enum if the arg does not expect or require a value
app.is_passed(bool)
: Check if an arg flag is passed.
NOTE : using the methods
has_a_value
,get_values
andis_passed
you can pass-n , --name , n , name
and they would all return same expected value
app.get_arg_at(u8)
: Get Arg at a specific position
NOTE : The runner is not included as part of the arg list . ie if a command like this
my-app > greet > hello
exist the position 1 for the commandgreet
is greet and notmy-app
app.print_help(message)
: Prints a well descriptive message.
Printing default help thisGet the app general help option
$ my-app --help
Get the move command help option
$ my-app move --help # a new command called
Dependencies
~0–9.5MB
~42K SLoC