use nu_engine::command_prelude::*;
use nu_protocol::{ListStream, Signals};
use wax::{Glob as WaxGlob, WalkBehavior, WalkEntry};
#[derive(Clone)]
pub struct Glob;
impl Command for Glob {
fn name(&self) -> &str {
"glob"
}
fn signature(&self) -> Signature {
Signature::build("glob")
.input_output_types(vec![(Type::Nothing, Type::List(Box::new(Type::String)))])
.required("glob", SyntaxShape::OneOf(vec![SyntaxShape::String, SyntaxShape::GlobPattern]), "The glob expression.")
.named(
"depth",
SyntaxShape::Int,
"directory depth to search",
Some('d'),
)
.switch(
"no-dir",
"Whether to filter out directories from the returned paths",
Some('D'),
)
.switch(
"no-file",
"Whether to filter out files from the returned paths",
Some('F'),
)
.switch(
"no-symlink",
"Whether to filter out symlinks from the returned paths",
Some('S'),
)
.named(
"exclude",
SyntaxShape::List(Box::new(SyntaxShape::String)),
"Patterns to exclude from the search: `glob` will not walk the inside of directories matching the excluded patterns.",
Some('e'),
)
.category(Category::FileSystem)
}
fn description(&self) -> &str {
"Creates a list of files and/or folders based on the glob pattern provided."
}
fn search_terms(&self) -> Vec<&str> {
vec!["pattern", "files", "folders", "list", "ls"]
}
fn examples(&self) -> Vec<Example> {
vec![
Example {
description: "Search for *.rs files",
example: "glob *.rs",
result: None,
},
Example {
description: "Search for *.rs and *.toml files recursively up to 2 folders deep",
example: "glob **/*.{rs,toml} --depth 2",
result: None,
},
Example {
description:
"Search for files and folders that begin with uppercase C or lowercase c",
example: r#"glob "[Cc]*""#,
result: None,
},
Example {
description:
"Search for files and folders like abc or xyz substituting a character for ?",
example: r#"glob "{a?c,x?z}""#,
result: None,
},
Example {
description: "A case-insensitive search for files and folders that begin with c",
example: r#"glob "(?i)c*""#,
result: None,
},
Example {
description: "Search for files for folders that do not begin with c, C, b, M, or s",
example: r#"glob "[!cCbMs]*""#,
result: None,
},
Example {
description: "Search for files or folders with 3 a's in a row in the name",
example: "glob <a*:3>",
result: None,
},
Example {
description: "Search for files or folders with only a, b, c, or d in the file name between 1 and 10 times",
example: "glob <[a-d]:1,10>",
result: None,
},
Example {
description: "Search for folders that begin with an uppercase ASCII letter, ignoring files and symlinks",
example: r#"glob "[A-Z]*" --no-file --no-symlink"#,
result: None,
},
Example {
description: "Search for files named tsconfig.json that are not in node_modules directories",
example: r#"glob **/tsconfig.json --exclude [**/node_modules/**]"#,
result: None,
},
Example {
description: "Search for all files that are not in the target nor .git directories",
example: r#"glob **/* --exclude [**/target/** **/.git/** */]"#,
result: None,
},
]
}
fn extra_description(&self) -> &str {
r#"For more glob pattern help, please refer to https://docs.rs/crate/wax/latest"#
}
fn run(
&self,
engine_state: &EngineState,
stack: &mut Stack,
call: &Call,
_input: PipelineData,
) -> Result<PipelineData, ShellError> {
let span = call.head;
let glob_pattern_input: Value = call.req(engine_state, stack, 0)?;
let glob_span = glob_pattern_input.span();
let depth = call.get_flag(engine_state, stack, "depth")?;
let no_dirs = call.has_flag(engine_state, stack, "no-dir")?;
let no_files = call.has_flag(engine_state, stack, "no-file")?;
let no_symlinks = call.has_flag(engine_state, stack, "no-symlink")?;
let paths_to_exclude: Option<Value> = call.get_flag(engine_state, stack, "exclude")?;
let (not_patterns, not_pattern_span): (Vec<String>, Span) = match paths_to_exclude {
None => (vec![], span),
Some(f) => {
let pat_span = f.span();
match f {
Value::List { vals: pats, .. } => {
let p = convert_patterns(pats.as_slice())?;
(p, pat_span)
}
_ => (vec![], span),
}
}
};
let glob_pattern =
match glob_pattern_input {
Value::String { val, .. } | Value::Glob { val, .. } => val,
_ => return Err(ShellError::IncorrectValue {
msg: "Incorrect glob pattern supplied to glob. Please use string or glob only."
.to_string(),
val_span: call.head,
call_span: glob_span,
}),
};
if glob_pattern.is_empty() {
return Err(ShellError::GenericError {
error: "glob pattern must not be empty".into(),
msg: "glob pattern is empty".into(),
span: Some(glob_span),
help: Some("add characters to the glob pattern".into()),
inner: vec![],
});
}
let folder_depth = if let Some(depth) = depth {
depth
} else if glob_pattern.contains("**") {
usize::MAX
} else if glob_pattern.contains('/') {
glob_pattern.split('/').count() + 1
} else {
1
};
let (prefix, glob) = match WaxGlob::new(&glob_pattern) {
Ok(p) => p.partition(),
Err(e) => {
return Err(ShellError::GenericError {
error: "error with glob pattern".into(),
msg: format!("{e}"),
span: Some(glob_span),
help: None,
inner: vec![],
})
}
};
let path = engine_state.cwd_as_string(Some(stack))?;
let path = match nu_path::canonicalize_with(prefix, path) {
Ok(path) => path,
Err(e) if e.to_string().contains("os error 2") =>
{
std::path::PathBuf::new() }
Err(e) => {
return Err(ShellError::GenericError {
error: "error in canonicalize".into(),
msg: format!("{e}"),
span: Some(glob_span),
help: None,
inner: vec![],
})
}
};
let result = if !not_patterns.is_empty() {
let np: Vec<&str> = not_patterns.iter().map(|s| s as &str).collect();
let glob_results = glob
.walk_with_behavior(
path,
WalkBehavior {
depth: folder_depth,
..Default::default()
},
)
.into_owned()
.not(np)
.map_err(|err| ShellError::GenericError {
error: "error with glob's not pattern".into(),
msg: format!("{err}"),
span: Some(not_pattern_span),
help: None,
inner: vec![],
})?
.flatten();
glob_to_value(
engine_state.signals(),
glob_results,
no_dirs,
no_files,
no_symlinks,
span,
)
} else {
let glob_results = glob
.walk_with_behavior(
path,
WalkBehavior {
depth: folder_depth,
..Default::default()
},
)
.into_owned()
.flatten();
glob_to_value(
engine_state.signals(),
glob_results,
no_dirs,
no_files,
no_symlinks,
span,
)
};
Ok(result.into_pipeline_data(span, engine_state.signals().clone()))
}
}
fn convert_patterns(columns: &[Value]) -> Result<Vec<String>, ShellError> {
let res = columns
.iter()
.map(|value| match &value {
Value::String { val: s, .. } => Ok(s.clone()),
_ => Err(ShellError::IncompatibleParametersSingle {
msg: "Incorrect column format, Only string as column name".to_string(),
span: value.span(),
}),
})
.collect::<Result<Vec<String>, _>>()?;
Ok(res)
}
fn glob_to_value(
signals: &Signals,
glob_results: impl Iterator<Item = WalkEntry<'static>> + Send + 'static,
no_dirs: bool,
no_files: bool,
no_symlinks: bool,
span: Span,
) -> ListStream {
let map_signals = signals.clone();
let result = glob_results.filter_map(move |entry| {
if let Err(err) = map_signals.check(span) {
return Some(Value::error(err, span));
};
let file_type = entry.file_type();
if !(no_dirs && file_type.is_dir()
|| no_files && file_type.is_file()
|| no_symlinks && file_type.is_symlink())
{
Some(Value::string(
entry.into_path().to_string_lossy().to_string(),
span,
))
} else {
None
}
});
ListStream::new(result, span, signals.clone())
}