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use std::fs::{copy, create_dir_all, read_dir};
use std::io::Result;
use std::path::Path;
/// Recursively copies the contents of a directory.
pub fn recursively_copy(source: &Path, target: &Path) -> Result<()> {
let entries = read_dir(source)?;
for entry in entries {
let entry = entry?;
let entry_type = entry.file_type()?;
let entry_name = entry.file_name();
let entry_source = entry.path();
let entry_target = target.join(entry_name);
if entry_type.is_dir() {
create_dir_all(&entry_target)?;
recursively_copy(&entry_source, &entry_target)?;
} else {
copy(&entry_source, &entry_target)?;
}
}
Ok(())
}
#[cfg(test)]
mod tests {
use std::fs::create_dir_all;
use super::*;
use test_utilities::*;
#[test]
fn test_recursively_copies_directories() {
let test_dir = setup_test_dir();
let source_dir = test_dir.join("source");
let target_dir = test_dir.join("target");
let nested_dir = source_dir.join("nested");
let hidden_dir = source_dir.join(".hidden");
create_dir_all(&target_dir).expect("Could not create target test directory");
create_dir_all(&nested_dir).expect("Could not create nested test directory");
create_dir_all(&hidden_dir).expect("Could not create hidden test directory");
create_test_file(&source_dir.join("image.png"), "A beautiful pencil");
create_test_file(&nested_dir.join("hello.txt"), "I am here");
create_test_file(&nested_dir.join(".hidden"), "I am not here?");
create_test_file(&hidden_dir.join("in_plain_sight.mkv"), "Almost");
create_test_file(&hidden_dir.join(".hidden"), "I'm double hidden");
recursively_copy(&source_dir, &target_dir).expect("Copy failed on test directory");
assert_file_contents(&target_dir.join("image.png"), "A beautiful pencil");
assert_file_contents(&target_dir.join("nested/hello.txt"), "I am here");
assert_file_contents(&target_dir.join("nested/.hidden"), "I am not here?");
assert_file_contents(&target_dir.join(".hidden/in_plain_sight.mkv"), "Almost");
assert_file_contents(&target_dir.join(".hidden/.hidden"), "I'm double hidden");
}
#[test]
fn test_empty_directory() {
let test_dir = setup_test_dir();
let source_dir = test_dir.join("source");
let target_dir = test_dir.join("target");
create_dir_all(&source_dir).expect("Could not create source test directory");
create_dir_all(&target_dir).expect("Could not create target test directory");
recursively_copy(&source_dir, &target_dir).expect("Copy failed on empty test directory");
assert_eq!(target_dir.read_dir().unwrap().count(), 0);
}
}
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