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add cd - support (#787)

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JT 2022-01-20 15:51:44 -05:00 committed by GitHub
parent 724cfaa890
commit b4e61a056c
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1 changed files with 51 additions and 14 deletions
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65
crates/nu-command/src/filesystem/cd.rs
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@ -1,5 +1,5 @@
use nu_engine::{current_dir, CallExt};
use nu_protocol::ast::Call;
use nu_protocol::ast::{Call, Expr, Expression};
use nu_protocol::engine::{Command, EngineState, Stack};
use nu_protocol::{Category, PipelineData, ShellError, Signature, SyntaxShape, Value};
@ -28,23 +28,55 @@ impl Command for Cd {
call: &Call,
_input: PipelineData,
) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
let raw_path = call.nth(0);
let path_val: Option<Value> = call.opt(engine_state, stack, 0)?;
let cwd = current_dir(engine_state, stack)?;
let (path, span) = match path_val {
Some(v) => {
let path = v.as_path()?;
let path = match nu_path::canonicalize_with(path, &cwd) {
Ok(p) => p,
Err(e) => {
return Err(ShellError::DirectoryNotFoundHelp(
v.span()?,
format!("IO Error: {:?}", e),
))
let (path, span) = match raw_path {
Some(v) => match &v {
Expression {
expr: Expr::Filepath(val),
span,
..
} if val == "-" => {
let oldpwd = stack.get_env_var(engine_state, "OLDPWD");
if let Some(oldpwd) = oldpwd {
let path = oldpwd.as_path()?;
let path = match nu_path::canonicalize_with(path, &cwd) {
Ok(p) => p,
Err(e) => {
return Err(ShellError::DirectoryNotFoundHelp(
*span,
format!("IO Error: {:?}", e),
))
}
};
(path.to_string_lossy().to_string(), *span)
} else {
(cwd.to_string_lossy().to_string(), *span)
}
};
(path.to_string_lossy().to_string(), v.span()?)
}
}
_ => match path_val {
Some(v) => {
let path = v.as_path()?;
let path = match nu_path::canonicalize_with(path, &cwd) {
Ok(p) => p,
Err(e) => {
return Err(ShellError::DirectoryNotFoundHelp(
v.span()?,
format!("IO Error: {:?}", e),
))
}
};
(path.to_string_lossy().to_string(), v.span()?)
}
None => {
let path = nu_path::expand_tilde("~");
(path.to_string_lossy().to_string(), call.head)
}
},
},
None => {
let path = nu_path::expand_tilde("~");
(path.to_string_lossy().to_string(), call.head)
@ -90,8 +122,13 @@ impl Command for Cd {
},
);
if let Some(oldpwd) = stack.get_env_var(engine_state, "PWD") {
stack.add_env_var("OLDPWD".into(), oldpwd)
}
//FIXME: this only changes the current scope, but instead this environment variable
//should probably be a block that loads the information from the state in the overlay
stack.add_env_var("PWD".into(), path_value);
Ok(PipelineData::new(call.head))
}