Add echo command

This commit is contained in:
Jonathan Turner 2019-09-08 11:43:53 +12:00
parent 90b358d60b
commit 4cdaed1ad4
3 changed files with 75 additions and 0 deletions

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@ -210,6 +210,7 @@ pub async fn cli() -> Result<(), Box<dyn Error>> {
per_item_command(Open), per_item_command(Open),
per_item_command(Post), per_item_command(Post),
per_item_command(Where), per_item_command(Where),
per_item_command(Echo),
whole_stream_command(Config), whole_stream_command(Config),
whole_stream_command(SkipWhile), whole_stream_command(SkipWhile),
per_item_command(Enter), per_item_command(Enter),

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@ -11,6 +11,7 @@ pub(crate) mod config;
pub(crate) mod cp; pub(crate) mod cp;
pub(crate) mod date; pub(crate) mod date;
pub(crate) mod debug; pub(crate) mod debug;
pub(crate) mod echo;
pub(crate) mod enter; pub(crate) mod enter;
pub(crate) mod exit; pub(crate) mod exit;
pub(crate) mod fetch; pub(crate) mod fetch;
@ -76,6 +77,7 @@ pub(crate) use config::Config;
pub(crate) use cp::Cpy; pub(crate) use cp::Cpy;
pub(crate) use date::Date; pub(crate) use date::Date;
pub(crate) use debug::Debug; pub(crate) use debug::Debug;
pub(crate) use echo::Echo;
pub(crate) use enter::Enter; pub(crate) use enter::Enter;
pub(crate) use exit::Exit; pub(crate) use exit::Exit;
pub(crate) use fetch::Fetch; pub(crate) use fetch::Fetch;

72
src/commands/echo.rs Normal file
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@ -0,0 +1,72 @@
use crate::data::Value;
use crate::errors::ShellError;
use crate::prelude::*;
use crate::parser::registry::Signature;
pub struct Echo;
impl PerItemCommand for Echo {
fn name(&self) -> &str {
"echo"
}
fn signature(&self) -> Signature {
Signature::build("echo").rest(SyntaxType::Any)
}
fn usage(&self) -> &str {
"Echo the argments back to the user."
}
fn run(
&self,
call_info: &CallInfo,
registry: &CommandRegistry,
raw_args: &RawCommandArgs,
_input: Tagged<Value>,
) -> Result<OutputStream, ShellError> {
run(call_info, registry, raw_args)
}
}
fn run(
call_info: &CallInfo,
_registry: &CommandRegistry,
_raw_args: &RawCommandArgs,
) -> Result<OutputStream, ShellError> {
let name = call_info.name_span;
let mut output = String::new();
let mut first = true;
if let Some(ref positional) = call_info.args.positional {
for i in positional {
match i.as_string() {
Ok(s) => {
if !first {
output.push_str(" ");
} else {
first = false;
}
output.push_str(&s);
}
_ => {
return Err(ShellError::labeled_error(
"Expect a string from pipeline",
"not a string-compatible value",
i.span(),
));
}
}
}
}
let stream = VecDeque::from(vec![Ok(ReturnSuccess::Value(
Value::string(output).simple_spanned(name),
))]);
Ok(stream.to_output_stream())
}