(Rust) commands tree.
See the rs docs. Look at progress and contribute on github.
Create a tree-like data structure of commands and actions to add an intuitive and interactive experience to an application. cmdtree uses a builder pattern to make constructing the tree ergonomic.
```rust,no_run extern crate cmdtree; use cmdtree::*;
fn main() {
let cmder = Builder::defaultconfig("cmdtree-example")
.beginclass("class1", "class1 help message") // a class
.beginclass("inner-class1", "nested class!") // can nest a class
.addaction("name", "print class name", |mut wtr, args| {
writeln!(wtr, "inner-class1",).unwrap()
})
.endclass()
.endclass() // closes out the classes
.beginclass("print", "pertains to printing stuff") // start another class sibling to class1
.addaction("echo", "repeat stuff", |mut wtr, args| {
writeln!(wtr, "{}", args.join(" ")).unwrap()
})
.addaction("countdown", "countdown from a number", |mut wtr, args| {
if args.len() != 1 {
println!("need one number",);
} else {
match str::parse::
cmder.run(); // run interactively } ```
Now run and in your shell:
sh
cmdtree-example=> help <-- Will print help messages
help -- prints the help messages
cancel | c -- returns to the root class
exit -- sends the exit signal to end the interactive loop
Classes:
class1 -- class1 help message
print -- pertains to printing stuff
cmdtree-example=> print <-- Can navigate the tree
cmdtree-example.print=> help
help -- prints the help messages
cancel | c -- returns to the root class
exit -- sends the exit signal to end the interactive loop
Actions:
echo -- repeat stuff
countdown -- countdown from a number
cmdtree-example.print=> echo hello, world! <-- Call the actions
hello, world!
cmdtree-example.print=> countdown
need one number
cmdtree-example.print=> countdown 10
10
9
8
7
6
5
4
3
2
1
0
cmdtree-example.print=> exit <-- exit the loop!