forked from extern/nushell
117 lines
3.2 KiB
Rust
117 lines
3.2 KiB
Rust
use nu_engine::{current_dir, CallExt};
|
|
use nu_protocol::ast::Call;
|
|
use nu_protocol::engine::{Command, EngineState, Stack};
|
|
use nu_protocol::{Category, Example, PipelineData, ShellError, Signature, SyntaxShape, Value};
|
|
|
|
/// Source a file for environment variables.
|
|
#[derive(Clone)]
|
|
pub struct Enter;
|
|
|
|
impl Command for Enter {
|
|
fn name(&self) -> &str {
|
|
"enter"
|
|
}
|
|
|
|
fn signature(&self) -> Signature {
|
|
Signature::build("enter")
|
|
.required(
|
|
"path",
|
|
SyntaxShape::Filepath,
|
|
"the path to enter as a new shell",
|
|
)
|
|
.category(Category::Shells)
|
|
}
|
|
|
|
fn usage(&self) -> &str {
|
|
"Enters a new shell at the given path."
|
|
}
|
|
|
|
fn run(
|
|
&self,
|
|
engine_state: &EngineState,
|
|
stack: &mut Stack,
|
|
call: &Call,
|
|
_input: PipelineData,
|
|
) -> Result<PipelineData, ShellError> {
|
|
let new_path: Value = call.req(engine_state, stack, 0)?;
|
|
let path_span = new_path.span()?;
|
|
|
|
let new_path = new_path.as_path()?;
|
|
|
|
let cwd = current_dir(engine_state, stack)?;
|
|
let new_path = nu_path::canonicalize_with(new_path, &cwd)?;
|
|
|
|
if !new_path.exists() {
|
|
return Err(ShellError::DirectoryNotFound(path_span, None));
|
|
}
|
|
|
|
if !new_path.is_dir() {
|
|
return Err(ShellError::DirectoryNotFoundCustom(
|
|
"not a directory".to_string(),
|
|
path_span,
|
|
));
|
|
}
|
|
|
|
let new_path = Value::String {
|
|
val: new_path.to_string_lossy().to_string(),
|
|
span: call.head,
|
|
};
|
|
|
|
let cwd = Value::String {
|
|
val: cwd.to_string_lossy().to_string(),
|
|
span: call.head,
|
|
};
|
|
|
|
let shells = stack.get_env_var(engine_state, "NUSHELL_SHELLS");
|
|
let mut shells = if let Some(v) = shells {
|
|
v.as_list()
|
|
.map(|x| x.to_vec())
|
|
.unwrap_or_else(|_| vec![cwd])
|
|
} else {
|
|
vec![cwd]
|
|
};
|
|
|
|
let current_shell = stack.get_env_var(engine_state, "NUSHELL_CURRENT_SHELL");
|
|
let mut current_shell = if let Some(v) = current_shell {
|
|
v.as_integer().unwrap_or_default() as usize
|
|
} else {
|
|
0
|
|
};
|
|
|
|
if current_shell + 1 > shells.len() {
|
|
shells.push(new_path.clone());
|
|
current_shell = shells.len();
|
|
} else {
|
|
shells.insert(current_shell + 1, new_path.clone());
|
|
current_shell += 1;
|
|
}
|
|
|
|
stack.add_env_var(
|
|
"NUSHELL_SHELLS".into(),
|
|
Value::List {
|
|
vals: shells,
|
|
span: call.head,
|
|
},
|
|
);
|
|
stack.add_env_var(
|
|
"NUSHELL_CURRENT_SHELL".into(),
|
|
Value::Int {
|
|
val: current_shell as i64,
|
|
span: call.head,
|
|
},
|
|
);
|
|
|
|
stack.add_env_var("PWD".into(), new_path);
|
|
|
|
Ok(PipelineData::new(call.head))
|
|
}
|
|
|
|
fn examples(&self) -> Vec<Example> {
|
|
vec![Example {
|
|
description: "Enter a new shell at path '../dir-foo'",
|
|
example: r#"enter ../dir-foo"#,
|
|
result: None,
|
|
}]
|
|
}
|
|
}
|