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//! The `show-generation` subcommand.
use crate::chunk::ClientTrust;
use crate::client::BackupClient;
use crate::config::ClientConfig;
use crate::db::DbInt;
use crate::error::ObnamError;
use crate::fsentry::FilesystemKind;
use crate::generation::GenId;
use indicatif::HumanBytes;
use serde::Serialize;
use structopt::StructOpt;
use tempfile::NamedTempFile;
use tokio::runtime::Runtime;
/// Show information about a generation.
#[derive(Debug, StructOpt)]
pub struct ShowGeneration {
/// Reference to the generation. Defaults to latest.
#[structopt(default_value = "latest")]
gen_id: String,
}
impl ShowGeneration {
/// Run the command.
pub fn run(&self, config: &ClientConfig) -> Result<(), ObnamError> {
let rt = Runtime::new()?;
rt.block_on(self.run_async(config))
}
async fn run_async(&self, config: &ClientConfig) -> Result<(), ObnamError> {
let temp = NamedTempFile::new()?;
let client = BackupClient::new(config)?;
let trust = client
.get_client_trust()
.await?
.or_else(|| Some(ClientTrust::new("FIXME", None, "".to_string(), vec![])))
.unwrap();
let genlist = client.list_generations(&trust);
let gen_id = genlist.resolve(&self.gen_id)?;
let gen = client.fetch_generation(&gen_id, temp.path()).await?;
let mut files = gen.files()?;
let mut files = files.iter()?;
let total_bytes = files.try_fold(0, |acc, file| {
file.map(|(_, e, _, _)| {
if e.kind() == FilesystemKind::Regular {
acc + e.len()
} else {
acc
}
})
});
let total_bytes = total_bytes?;
let output = Output::new(gen_id)
.db_bytes(temp.path().metadata()?.len())
.file_count(gen.file_count()?)
.file_bytes(total_bytes);
serde_json::to_writer_pretty(std::io::stdout(), &output)?;
Ok(())
}
}
#[derive(Debug, Default, Serialize)]
struct Output {
generation_id: String,
file_count: DbInt,
file_bytes: String,
file_bytes_raw: u64,
db_bytes: String,
db_bytes_raw: u64,
}
impl Output {
fn new(gen_id: GenId) -> Self {
Self {
generation_id: format!("{}", gen_id),
..Self::default()
}
}
fn file_count(mut self, n: DbInt) -> Self {
self.file_count = n;
self
}
fn file_bytes(mut self, n: u64) -> Self {
self.file_bytes_raw = n;
self.file_bytes = HumanBytes(n).to_string();
self
}
fn db_bytes(mut self, n: u64) -> Self {
self.db_bytes_raw = n;
self.db_bytes = HumanBytes(n).to_string();
self
}
}
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