131 lines
3.5 KiB
Rust
131 lines
3.5 KiB
Rust
extern crate core;
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#[cfg(test)]
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extern crate dir_diff;
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#[cfg(test)]
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extern crate tempfile;
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extern crate walkdir;
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use std::fs;
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use std::io;
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use std::path::Path;
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use walkdir::DirEntry;
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use walkdir::WalkDir;
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struct BackupEngine<'a> {
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source_path: &'a Path,
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repository_path: &'a Path,
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}
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impl<'a> BackupEngine<'a> {
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fn new(source_path: &'a Path, repository_path: &'a Path) -> Self {
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BackupEngine {
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source_path,
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repository_path,
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}
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}
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fn backup(&self) -> Result<(), io::Error> {
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let walker = WalkDir::new(self.source_path);
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for maybe_entry in walker {
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match maybe_entry {
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Ok(entry) => {
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if entry.path() != self.source_path {
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self.process_entry(&entry)?;
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}
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}
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Err(error) => return Err(error.into()),
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}
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}
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Ok(())
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}
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fn process_entry(&self, entry: &DirEntry) -> Result<(), io::Error> {
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if entry.file_type().is_dir() {
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fs::create_dir(self.repository_path.join(entry.file_name()))?;
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}
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if entry.file_type().is_file() {
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fs::copy(entry.path(), self.repository_path.join(entry.file_name()))?;
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}
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Ok(())
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}
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}
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struct RestoreEngine<'a> {
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repository_path: &'a Path,
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target_path: &'a Path,
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}
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impl<'a> RestoreEngine<'a> {
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fn new(repository_path: &'a Path, target_path: &'a Path) -> Self {
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RestoreEngine {
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repository_path,
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target_path,
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}
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}
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fn restore(&self) -> Result<(), io::Error> {
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let walker = WalkDir::new(self.repository_path);
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for maybe_entry in walker {
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match maybe_entry {
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Ok(entry) => {
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if entry.path() != self.repository_path {
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self.process_entry(&entry)?;
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}
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}
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Err(error) => return Err(error.into()),
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}
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}
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Ok(())
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}
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fn process_entry(&self, entry: &DirEntry) -> Result<(), io::Error> {
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if entry.file_type().is_dir() {
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fs::create_dir(self.target_path.join(entry.file_name()))?;
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}
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if entry.file_type().is_file() {
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fs::copy(entry.path(), self.target_path.join(entry.file_name()))?;
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}
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Ok(())
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}
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}
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fn main() {}
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mod rustback {
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#[cfg(test)]
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mod should {
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use dir_diff::is_different;
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use std::fs::File;
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use std::io::Error;
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use std::io::Write;
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use tempfile::tempdir;
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use BackupEngine;
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use RestoreEngine;
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#[test]
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fn be_able_to_restore_backed_up_files() -> Result<(), Error> {
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let source = tempdir()?;
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File::create(source.path().join("first"))?.write_all("some contents".as_bytes())?;
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File::create(source.path().join("second"))?.write_all("some contents".as_bytes())?;
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File::create(source.path().join("third"))?.write_all("some other contents".as_bytes())?;
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let repository = tempdir()?;
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let backup_engine = BackupEngine::new(&source.path(), &repository.path());
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backup_engine.backup()?;
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let restore_target = tempdir()?;
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let restore_engine = RestoreEngine::new(&repository.path(), &restore_target.path());
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restore_engine.restore()?;
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let are_source_and_target_different = is_different(&source.path(), &restore_target.path()).unwrap();
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assert!(!are_source_and_target_different);
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Ok(())
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}
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}
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}
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