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use crate::filesystem::cd_query::query;
use crate::{get_current_shell, get_shells};
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, Spanned, SyntaxShape, Value,
};
#[derive(Clone)]
pub struct Cd;
impl Command for Cd {
fn name(&self) -> &str {
"cd"
}
fn usage(&self) -> &str {
"Change directory."
}
fn search_terms(&self) -> Vec<&str> {
vec!["change", "directory", "dir", "folder", "switch"]
}
fn signature(&self) -> nu_protocol::Signature {
Signature::build("cd")
.optional("path", SyntaxShape::Directory, "the path to change to")
.category(Category::FileSystem)
}
fn run(
&self,
engine_state: &EngineState,
stack: &mut Stack,
call: &Call,
_input: PipelineData,
) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
let path_val: Option<Spanned<String>> = call.opt(engine_state, stack, 0)?;
let cwd = current_dir(engine_state, stack)?;
let config = engine_state.get_config();
let use_abbrev = config.cd_with_abbreviations;
let path_val = {
if let Some(path) = path_val {
Some(Spanned {
item: match strip_ansi_escapes::strip(&path.item) {
Ok(item) => String::from_utf8(item).unwrap_or(path.item),
Err(_) => path.item,
},
span: path.span,
})
} else {
path_val
}
};
let (path, span) = match path_val {
Some(v) => {
if v.item == "-" {
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.clone(), &cwd) {
Ok(p) => p,
Err(e1) => {
if use_abbrev {
match query(&path, None, v.span) {
Ok(p) => p,
Err(e) => {
return Err(ShellError::DirectoryNotFound(
v.span,
Some(format!("IO Error: {:?}", e)),
))
}
}
} else {
return Err(ShellError::DirectoryNotFound(
v.span,
Some(format!("IO Error: {:?}", e1)),
));
}
}
};
(path.to_string_lossy().to_string(), v.span)
} else {
(cwd.to_string_lossy().to_string(), v.span)
}
} else {
let path_no_whitespace =
&v.item.trim_end_matches(|x| matches!(x, '\x09'..='\x0d'));
let path = match nu_path::canonicalize_with(path_no_whitespace, &cwd) {
Ok(p) => {
if !p.is_dir() {
if use_abbrev {
match query(&p, None, v.span) {
Ok(path) => path,
Err(e) => {
return Err(ShellError::DirectoryNotFound(
v.span,
Some(format!("IO Error: {:?}", e)),
))
}
};
} else {
return Err(ShellError::NotADirectory(v.span));
}
};
p
}
Err(e1) => {
if use_abbrev {
match query(&path_no_whitespace, None, v.span) {
Ok(path) => path,
Err(e) => {
return Err(ShellError::DirectoryNotFound(
v.span,
Some(format!("IO Error: {:?}", e)),
))
}
}
} else {
return Err(ShellError::DirectoryNotFound(
v.span,
Some(format!("IO Error: {:?}", e1)),
));
}
}
};
(path.to_string_lossy().to_string(), v.span)
}
}
None => {
let path = nu_path::expand_tilde("~");
(path.to_string_lossy().to_string(), call.head)
}
};
let path_value = Value::String { val: path, span };
let cwd = Value::String {
val: cwd.to_string_lossy().to_string(),
span: call.head,
};
let mut shells = get_shells(engine_state, stack, cwd);
let current_shell = get_current_shell(engine_state, stack);
shells[current_shell] = path_value.clone();
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,
},
);
if let Some(oldpwd) = stack.get_env_var(engine_state, "PWD") {
stack.add_env_var("OLDPWD".into(), oldpwd)
}
stack.add_env_var("PWD".into(), path_value);
Ok(PipelineData::new(call.head))
}
fn examples(&self) -> Vec<Example> {
vec![
Example {
description: "Change to your home directory",
example: r#"cd ~"#,
result: None,
},
Example {
description: "Change to a directory via abbreviations",
example: r#"cd d/s/9"#,
result: None,
},
Example {
description: "Change to the previous working directory ($OLDPWD)",
example: r#"cd -"#,
result: None,
},
]
}
}
