nushell/src/commands/cp.rs

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Rust
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use crate::errors::ShellError;
use crate::parser::hir::SyntaxType;
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use crate::parser::registry::{CommandRegistry, Signature};
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use crate::prelude::*;
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use std::path::{Path, PathBuf};
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pub struct Copycp;
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impl StaticCommand for Copycp {
fn run(
&self,
args: CommandArgs,
registry: &CommandRegistry,
) -> Result<OutputStream, ShellError> {
cp(args, registry)
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}
fn name(&self) -> &str {
"cp"
}
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fn signature(&self) -> Signature {
Signature::build("cp")
.named("file", SyntaxType::Any)
.switch("recursive")
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}
}
#[derive(Debug, Eq, Ord, PartialEq, PartialOrd)]
pub struct Res {
pub loc: PathBuf,
pub at: usize,
}
impl Res {}
pub struct FileStructure {
root: PathBuf,
resources: Vec<Res>,
}
impl FileStructure {
pub fn new() -> FileStructure {
FileStructure {
root: PathBuf::new(),
resources: Vec::<Res>::new(),
}
}
pub fn set_root(&mut self, path: &Path) {
self.root = path.to_path_buf();
}
pub fn paths_applying_with<F>(&mut self, to: F) -> Vec<(PathBuf, PathBuf)>
where
F: Fn((PathBuf, usize)) -> (PathBuf, PathBuf),
{
self.resources
.iter()
.map(|f| (PathBuf::from(&f.loc), f.at))
.map(|f| to(f))
.collect()
}
pub fn walk_decorate(&mut self, start_path: &Path) {
self.set_root(&dunce::canonicalize(start_path).unwrap());
self.resources = Vec::<Res>::new();
self.build(start_path, 0);
self.resources.sort();
}
fn build(&mut self, src: &'a Path, lvl: usize) {
let source = dunce::canonicalize(src).unwrap();
if source.is_dir() {
for entry in std::fs::read_dir(&source).unwrap() {
let entry = entry.unwrap();
let path = entry.path();
if path.is_dir() {
self.build(&path, lvl + 1);
}
self.resources.push(Res {
loc: path.to_path_buf(),
at: lvl,
});
}
} else {
self.resources.push(Res {
loc: source,
at: lvl,
});
}
}
}
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pub fn cp(args: CommandArgs, registry: &CommandRegistry) -> Result<OutputStream, ShellError> {
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let mut source = PathBuf::from(args.shell_manager.path());
let mut destination = PathBuf::from(args.shell_manager.path());
let name_span = args.call_info.name_span;
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let args = args.evaluate_once(registry)?;
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match args
.nth(0)
.ok_or_else(|| ShellError::string(&format!("No file or directory specified")))?
.as_string()?
.as_str()
{
file => {
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source.push(file);
}
}
match args
.nth(1)
.ok_or_else(|| ShellError::string(&format!("No file or directory specified")))?
.as_string()?
.as_str()
{
file => {
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destination.push(file);
}
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}
let sources = glob::glob(&source.to_string_lossy());
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if sources.is_err() {
return Err(ShellError::labeled_error(
"Invalid pattern.",
"Invalid pattern.",
args.nth(0).unwrap().span(),
));
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}
let sources: Vec<_> = sources.unwrap().collect();
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if sources.len() == 1 {
if let Ok(entry) = &sources[0] {
if entry.is_dir() && !args.has("recursive") {
return Err(ShellError::labeled_error(
"is a directory (not copied). Try using \"--recursive\".",
"is a directory (not copied). Try using \"--recursive\".",
args.nth(0).unwrap().span(),
));
}
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let mut sources: FileStructure = FileStructure::new();
sources.walk_decorate(&entry);
if entry.is_file() {
let strategy = |(source_file, _depth_level)| {
if destination.exists() {
let mut new_dst = dunce::canonicalize(destination.clone()).unwrap();
new_dst.push(entry.file_name().unwrap());
(source_file, new_dst)
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} else {
(source_file, destination.clone())
}
};
for (ref src, ref dst) in sources.paths_applying_with(strategy) {
if src.is_file() {
match std::fs::copy(src, dst) {
Err(e) => {
return Err(ShellError::labeled_error(
e.to_string(),
e.to_string(),
name_span,
));
}
Ok(o) => o,
};
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}
}
}
if entry.is_dir() {
if !destination.exists() {
match std::fs::create_dir_all(&destination) {
Err(e) => {
return Err(ShellError::labeled_error(
e.to_string(),
e.to_string(),
name_span,
));
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}
Ok(o) => o,
};
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let strategy = |(source_file, depth_level)| {
let mut new_dst = destination.clone();
let path = dunce::canonicalize(&source_file).unwrap();
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let mut comps: Vec<_> = path
.components()
.map(|fragment| fragment.as_os_str())
.rev()
.take(1 + depth_level)
.collect();
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comps.reverse();
for fragment in comps.iter() {
new_dst.push(fragment);
}
(PathBuf::from(&source_file), PathBuf::from(new_dst))
};
for (ref src, ref dst) in sources.paths_applying_with(strategy) {
if src.is_dir() {
if !dst.exists() {
match std::fs::create_dir_all(dst) {
Err(e) => {
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return Err(ShellError::labeled_error(
e.to_string(),
e.to_string(),
name_span,
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));
}
Ok(o) => o,
};
}
}
if src.is_file() {
match std::fs::copy(src, dst) {
Err(e) => {
return Err(ShellError::labeled_error(
e.to_string(),
e.to_string(),
name_span,
));
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}
Ok(o) => o,
};
}
}
} else {
destination.push(entry.file_name().unwrap());
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match std::fs::create_dir_all(&destination) {
Err(e) => {
return Err(ShellError::labeled_error(
e.to_string(),
e.to_string(),
name_span,
));
}
Ok(o) => o,
};
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let strategy = |(source_file, depth_level)| {
let mut new_dst = dunce::canonicalize(&destination).unwrap();
let path = dunce::canonicalize(&source_file).unwrap();
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let mut comps: Vec<_> = path
.components()
.map(|fragment| fragment.as_os_str())
.rev()
.take(1 + depth_level)
.collect();
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comps.reverse();
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for fragment in comps.iter() {
new_dst.push(fragment);
}
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(PathBuf::from(&source_file), PathBuf::from(new_dst))
};
for (ref src, ref dst) in sources.paths_applying_with(strategy) {
if src.is_dir() {
if !dst.exists() {
match std::fs::create_dir_all(dst) {
Err(e) => {
return Err(ShellError::labeled_error(
e.to_string(),
e.to_string(),
name_span,
));
}
Ok(o) => o,
};
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}
}
if src.is_file() {
match std::fs::copy(src, dst) {
Err(e) => {
return Err(ShellError::labeled_error(
e.to_string(),
e.to_string(),
name_span,
));
}
Ok(o) => o,
};
}
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}
}
}
}
} else {
if destination.exists() {
if !sources.iter().all(|x| (x.as_ref().unwrap()).is_file()) && !args.has("recursive") {
return Err(ShellError::labeled_error(
"Copy aborted (directories found). Try using \"--recursive\".",
"Copy aborted (directories found). Try using \"--recursive\".",
args.nth(0).unwrap().span(),
));
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}
for entry in sources {
if let Ok(entry) = entry {
let mut to = PathBuf::from(&destination);
to.push(&entry.file_name().unwrap());
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match std::fs::copy(&entry, &to) {
Err(e) => {
return Err(ShellError::labeled_error(
e.to_string(),
e.to_string(),
name_span,
));
}
Ok(o) => o,
};
}
}
} else {
return Err(ShellError::labeled_error(
format!(
"Copy aborted. (Does {:?} exist?)",
&destination.file_name().unwrap()
),
format!(
"Copy aborted. (Does {:?} exist?)",
&destination.file_name().unwrap()
),
args.nth(1).unwrap().span(),
));
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}
}
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Ok(OutputStream::empty())
}
#[cfg(test)]
mod tests {
use super::{FileStructure, Res};
use std::path::PathBuf;
fn fixtures() -> PathBuf {
let mut sdx = PathBuf::new();
sdx.push("tests");
sdx.push("fixtures");
sdx.push("formats");
dunce::canonicalize(sdx).unwrap()
}
#[test]
fn prepares_and_decorates_source_files_for_copying() {
let mut res = FileStructure::new();
res.walk_decorate(fixtures().as_path());
assert_eq!(
res.resources,
vec![
Res {
loc: fixtures().join("appveyor.yml"),
at: 0
},
Res {
loc: fixtures().join("caco3_plastics.csv"),
at: 0
},
Res {
loc: fixtures().join("cargo_sample.toml"),
at: 0
},
Res {
loc: fixtures().join("jonathan.xml"),
at: 0
},
Res {
loc: fixtures().join("sample.ini"),
at: 0
},
Res {
loc: fixtures().join("sgml_description.json"),
at: 0
}
]
);
}
}