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|
use crate::backup_progress::BackupProgress;
use crate::backup_reason::Reason;
use crate::chunkid::ChunkId;
use crate::client::{BackupClient, ClientError};
use crate::config::ClientConfig;
use crate::error::ObnamError;
use crate::fsentry::FilesystemEntry;
use crate::fsiter::{AnnotatedFsEntry, FsIterError, FsIterator};
use crate::generation::{LocalGeneration, LocalGenerationError, NascentError, NascentGeneration};
use crate::policy::BackupPolicy;
use log::{info, warn};
use std::path::{Path, PathBuf};
pub struct BackupRun<'a> {
client: &'a BackupClient,
policy: BackupPolicy,
buffer_size: usize,
progress: BackupProgress,
}
#[derive(Debug, thiserror::Error)]
pub enum BackupError {
#[error(transparent)]
ClientError(#[from] ClientError),
#[error(transparent)]
FsIterError(#[from] FsIterError),
#[error(transparent)]
LocalGenerationError(#[from] LocalGenerationError),
}
#[derive(Debug)]
pub struct FsEntryBackupOutcome {
pub entry: FilesystemEntry,
pub ids: Vec<ChunkId>,
pub reason: Reason,
pub is_cachedir_tag: bool,
}
impl<'a> BackupRun<'a> {
pub fn initial(config: &ClientConfig, client: &'a BackupClient) -> Result<Self, BackupError> {
Ok(Self {
client,
policy: BackupPolicy::default(),
buffer_size: config.chunk_size,
progress: BackupProgress::initial(),
})
}
pub fn incremental(
config: &ClientConfig,
client: &'a BackupClient,
) -> Result<Self, BackupError> {
Ok(Self {
client,
policy: BackupPolicy::default(),
buffer_size: config.chunk_size,
progress: BackupProgress::incremental(),
})
}
pub fn start(
&mut self,
genid: Option<&str>,
oldname: &Path,
) -> Result<LocalGeneration, ObnamError> {
match genid {
None => {
// Create a new, empty generation.
NascentGeneration::create(oldname)?;
// Open the newly created empty generation.
Ok(LocalGeneration::open(oldname)?)
}
Some(genid) => {
let old = self.fetch_previous_generation(genid, oldname)?;
self.progress
.files_in_previous_generation(old.file_count()? as u64);
Ok(old)
}
}
}
fn fetch_previous_generation(
&self,
genid: &str,
oldname: &Path,
) -> Result<LocalGeneration, ObnamError> {
let progress = BackupProgress::download_generation(genid);
let old = self.client.fetch_generation(genid, &oldname)?;
progress.finish();
Ok(old)
}
pub fn finish(&self) {
self.progress.finish();
}
pub fn backup_roots(
&self,
config: &ClientConfig,
old: &LocalGeneration,
newpath: &Path,
// TODO: turn this tuple into a struct for readability
) -> Result<(i64, Vec<BackupError>, Vec<PathBuf>), NascentError> {
let mut all_warnings = vec![];
let mut new_cachedir_tags = vec![];
let count = {
let mut new = NascentGeneration::create(newpath)?;
for root in &config.roots {
let iter = FsIterator::new(root, config.exclude_cache_tag_directories);
let entries = iter.map(|entry| {
if let Ok(ref entry) = entry {
let path = entry.inner.pathbuf();
if entry.is_cachedir_tag && !old.is_cachedir_tag(&path)? {
new_cachedir_tags.push(path);
}
};
self.backup(entry, &old)
});
let mut warnings = new.insert_iter(entries)?;
all_warnings.append(&mut warnings);
}
new.file_count()
};
self.finish();
Ok((count, all_warnings, new_cachedir_tags))
}
pub fn backup(
&self,
entry: Result<AnnotatedFsEntry, FsIterError>,
old: &LocalGeneration,
) -> Result<FsEntryBackupOutcome, BackupError> {
match entry {
Err(err) => {
warn!("backup: {}", err);
self.found_problem();
Err(BackupError::FsIterError(err))
}
Ok(entry) => {
let path = &entry.inner.pathbuf();
info!("backup: {}", path.display());
self.found_live_file(path);
let reason = self.policy.needs_backup(&old, &entry.inner);
match reason {
Reason::IsNew
| Reason::Changed
| Reason::GenerationLookupError
| Reason::Unknown => Ok(backup_file(
&self.client,
&entry,
&path,
self.buffer_size,
reason,
)),
Reason::Unchanged | Reason::Skipped | Reason::FileError => {
let fileno = old.get_fileno(&entry.inner.pathbuf())?;
let ids = if let Some(fileno) = fileno {
let mut ids = vec![];
for id in old.chunkids(fileno)?.iter()? {
ids.push(id?);
}
ids
} else {
vec![]
};
Ok(FsEntryBackupOutcome {
entry: entry.inner,
ids,
reason,
is_cachedir_tag: entry.is_cachedir_tag,
})
}
}
}
}
}
fn found_live_file(&self, path: &Path) {
self.progress.found_live_file(path);
}
fn found_problem(&self) {
self.progress.found_problem();
}
}
fn backup_file(
client: &BackupClient,
entry: &AnnotatedFsEntry,
path: &Path,
chunk_size: usize,
reason: Reason,
) -> FsEntryBackupOutcome {
let ids = client.upload_filesystem_entry(&entry.inner, chunk_size);
match ids {
Err(err) => {
warn!("error backing up {}, skipping it: {}", path.display(), err);
FsEntryBackupOutcome {
entry: entry.inner.clone(),
ids: vec![],
reason: Reason::FileError,
is_cachedir_tag: entry.is_cachedir_tag,
}
}
Ok(ids) => FsEntryBackupOutcome {
entry: entry.inner.clone(),
ids,
reason,
is_cachedir_tag: entry.is_cachedir_tag,
},
}
}
|
