nushell/crates/nu-cli/src/commands/classified/internal.rs
2020-06-15 09:00:42 +12:00

241 lines
12 KiB
Rust

use crate::commands::command::whole_stream_command;
use crate::commands::run_alias::AliasCommand;
use crate::commands::UnevaluatedCallInfo;
use crate::prelude::*;
use log::{log_enabled, trace};
use nu_errors::ShellError;
use nu_protocol::hir::InternalCommand;
use nu_protocol::{CommandAction, Primitive, ReturnSuccess, Scope, UntaggedValue, Value};
pub(crate) async fn run_internal_command(
command: InternalCommand,
context: &mut Context,
input: InputStream,
it: &Value,
vars: &IndexMap<String, Value>,
env: &IndexMap<String, String>,
) -> Result<InputStream, ShellError> {
if log_enabled!(log::Level::Trace) {
trace!(target: "nu::run::internal", "->");
trace!(target: "nu::run::internal", "{}", command.name);
}
let scope = Scope {
it: it.clone(),
vars: vars.clone(),
env: env.clone(),
};
let objects: InputStream = trace_stream!(target: "nu::trace_stream::internal", "input" = input);
let internal_command = context.expect_command(&command.name);
let result = {
context
.run_command(
internal_command?,
Tag::unknown_anchor(command.name_span),
command.args.clone(),
&scope,
objects,
)
.await
};
let head = Arc::new(command.args.head.clone());
//let context = Arc::new(context.clone());
let context = context.clone();
let command = Arc::new(command);
let scope = Arc::new(scope);
// let scope = scope.clone();
Ok(InputStream::from_stream(
result
.then(move |item| {
let head = head.clone();
let command = command.clone();
let mut context = context.clone();
let scope = scope.clone();
async move {
match item {
Ok(ReturnSuccess::Action(action)) => match action {
CommandAction::ChangePath(path) => {
context.shell_manager.set_path(path);
InputStream::from_stream(futures::stream::iter(vec![]))
}
CommandAction::Exit => std::process::exit(0), // TODO: save history.txt
CommandAction::Error(err) => {
context.error(err.clone());
InputStream::one(UntaggedValue::Error(err).into_untagged_value())
}
CommandAction::AutoConvert(tagged_contents, extension) => {
let contents_tag = tagged_contents.tag.clone();
let command_name = format!("from {}", extension);
let command = command.clone();
if let Some(converter) = context.registry.get_command(&command_name)
{
let new_args = RawCommandArgs {
host: context.host.clone(),
ctrl_c: context.ctrl_c.clone(),
current_errors: context.current_errors.clone(),
shell_manager: context.shell_manager.clone(),
call_info: UnevaluatedCallInfo {
args: nu_protocol::hir::Call {
head: (&*head).clone(),
positional: None,
named: None,
span: Span::unknown(),
is_last: false,
},
name_tag: Tag::unknown_anchor(command.name_span),
scope: (&*scope).clone(),
},
};
let mut result = converter
.run(
new_args.with_input(vec![tagged_contents]),
&context.registry,
)
.await;
let result_vec: Vec<Result<ReturnSuccess, ShellError>> =
result.drain_vec().await;
let mut output = vec![];
for res in result_vec {
match res {
Ok(ReturnSuccess::Value(Value {
value: UntaggedValue::Table(list),
..
})) => {
for l in list {
output.push(Ok(l));
}
}
Ok(ReturnSuccess::Value(Value { value, .. })) => {
output.push(Ok(
value.into_value(contents_tag.clone())
));
}
Err(e) => output.push(Err(e)),
_ => {}
}
}
futures::stream::iter(output).to_input_stream()
} else {
InputStream::one(tagged_contents)
}
}
CommandAction::EnterHelpShell(value) => match value {
Value {
value: UntaggedValue::Primitive(Primitive::String(cmd)),
tag,
} => {
context.shell_manager.insert_at_current(Box::new(
match HelpShell::for_command(
UntaggedValue::string(cmd).into_value(tag),
&context.registry(),
) {
Ok(v) => v,
Err(err) => {
return InputStream::one(
UntaggedValue::Error(err).into_untagged_value(),
)
}
},
));
InputStream::from_stream(futures::stream::iter(vec![]))
}
_ => {
context.shell_manager.insert_at_current(Box::new(
match HelpShell::index(&context.registry()) {
Ok(v) => v,
Err(err) => {
return InputStream::one(
UntaggedValue::Error(err).into_untagged_value(),
)
}
},
));
InputStream::from_stream(futures::stream::iter(vec![]))
}
},
CommandAction::EnterValueShell(value) => {
context
.shell_manager
.insert_at_current(Box::new(ValueShell::new(value)));
InputStream::from_stream(futures::stream::iter(vec![]))
}
CommandAction::EnterShell(location) => {
context.shell_manager.insert_at_current(Box::new(
match FilesystemShell::with_location(
location,
context.registry().clone(),
) {
Ok(v) => v,
Err(err) => {
return InputStream::one(
UntaggedValue::Error(err.into())
.into_untagged_value(),
)
}
},
));
InputStream::from_stream(futures::stream::iter(vec![]))
}
CommandAction::AddAlias(name, args, block) => {
context.add_commands(vec![whole_stream_command(
AliasCommand::new(name, args, block),
)]);
InputStream::from_stream(futures::stream::iter(vec![]))
}
CommandAction::PreviousShell => {
context.shell_manager.prev();
InputStream::from_stream(futures::stream::iter(vec![]))
}
CommandAction::NextShell => {
context.shell_manager.next();
InputStream::from_stream(futures::stream::iter(vec![]))
}
CommandAction::LeaveShell => {
context.shell_manager.remove_at_current();
if context.shell_manager.is_empty() {
std::process::exit(0); // TODO: save history.txt
}
InputStream::from_stream(futures::stream::iter(vec![]))
}
},
Ok(ReturnSuccess::Value(Value {
value: UntaggedValue::Error(err),
tag,
})) => {
context.error(err.clone());
InputStream::one(UntaggedValue::Error(err).into_value(tag))
}
Ok(ReturnSuccess::Value(v)) => InputStream::one(v),
Ok(ReturnSuccess::DebugValue(v)) => {
let doc = PrettyDebug::pretty_doc(&v);
let mut buffer = termcolor::Buffer::ansi();
let _ = doc.render_raw(
context.with_host(|host| host.width() - 5),
&mut nu_source::TermColored::new(&mut buffer),
);
let value = String::from_utf8_lossy(buffer.as_slice());
InputStream::one(UntaggedValue::string(value).into_untagged_value())
}
Err(err) => {
context.error(err.clone());
InputStream::one(UntaggedValue::Error(err).into_untagged_value())
}
}
}
})
.flatten()
.take_while(|x| futures::future::ready(!x.is_error())),
))
}