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+openssl = { version = "0.10.30", features = ["vendored"] } +config = { version = "0.11.0", features = ["yaml", "json", "toml", "hjson", "ini"] } +failure = "0.1.8" +sqlite = "0.26.0" +md5 = "0.7.0" +chrono = "0.4.19" +prettytable-rs = "0.8.0" diff --git a/examples/config.toml b/examples/config.toml new file mode 100644 index 0000000..520aad3 --- /dev/null +++ b/examples/config.toml @@ -0,0 +1,13 @@ +# Example configuration file for rustnapshot + +# Snapshots directory +dest_dir = "/mnt/defvol/_snapshots/" +# Directory to be snapshoted +source_dir = "/mnt/defvol/_active/root/" +# SQLite database file PATH, created if no exists, recommended to be in the snapshots dir +database_file = "/mnt/defvol/_snapshots/rustnapshot.sqlite" +# Prefix for the snapshots, they will be saved in the format prefix-$current_date +snapshot_prefix = "root" +# Last snapshots to keep. If prefix is specified then only the snapshots with that prefix +# are deleted +keep_only = "2" diff --git a/src/args.rs b/src/args.rs new file mode 100644 index 0000000..513a9d4 --- /dev/null +++ b/src/args.rs @@ -0,0 +1,123 @@ +use { + crate::structs::Args, + clap::{load_yaml, value_t, App}, + std::{collections::HashMap, path::Path}, +}; + +pub fn get_args() -> Args { + let yaml = load_yaml!("cli.yml"); + let matches = App::from_yaml(yaml) + .version(clap::crate_version!()) + .get_matches(); + let settings: HashMap = + return_settings(&matches, &mut config::Config::default()); + Args { + create_snapshot: matches.is_present("create-snapshot"), + delete_snapshot: matches.is_present("delete-snapshot"), + list_snapshots: matches.is_present("list-snapshots"), + clean_snapshots: matches.is_present("clean-snapshots") || matches.is_present("keep-only"), + restore_snapshot: matches.is_present("restore-snapshot"), + dest_dir: if matches.is_present("dest-dir") { + value_t!(matches, "dest-dir", String).unwrap_or_else(|_| String::new()) + } else { + return_value_or_default(&settings, "dest_dir", String::new()) + }, + source_dir: if matches.is_present("source-dir") { + value_t!(matches, "source-dir", String).unwrap_or_else(|_| String::new()) + } else { + return_value_or_default(&settings, "source_dir", String::new()) + }, + database_file: if matches.is_present("database-file") { + value_t!(matches, "database-file", String) + .unwrap_or_else(|_| String::from("rusnapshot.sqlite")) + } else { + return_value_or_default( + &settings, + "database_file", + String::from("rusnapshot.sqlite"), + ) + }, + snapshot_name: String::new(), + snapshot_id: value_t!(matches, "snapshot-id", String).unwrap_or_else(|_| String::new()), + snapshot_prefix: if matches.is_present("snapshot-prefix") { + value_t!(matches, "snapshot-prefix", String) + .unwrap_or_else(|_| String::from("snapshot")) + } else { + return_value_or_default(&settings, "snapshot_prefix", String::from("snapshot")) + }, + keep_only: if matches.is_present("keep-only") { + value_t!(matches, "keep-only", usize).unwrap_or_else(|_| 0) + } else { + return_value_or_default(&settings, "keep_only", 0.to_string()) + .parse() + .unwrap_or_default() + }, + } +} + +fn return_settings( + matches: &clap::ArgMatches, + settings: &mut config::Config, +) -> HashMap { + if matches.is_present("config-file") { + match settings.merge(config::File::with_name( + &value_t!(matches, "config-file", String).unwrap(), + )) { + Ok(settings) => match settings.merge(config::Environment::with_prefix("RUSNAPSHOT")) { + Ok(settings) => settings + .clone() + .try_into::>() + .unwrap(), + Err(e) => { + eprintln!("Error merging environment variables into settings: {}", e); + std::process::exit(1) + } + }, + Err(e) => { + eprintln!("Error reading config file: {}", e); + std::process::exit(1) + } + } + } else if Path::new("rusnapshot.toml").exists() + || Path::new("rusnapshot.json").exists() + || Path::new("rusnapshot.hjson").exists() + || Path::new("rusnapshot.ini").exists() + || Path::new("rusnapshot.yml").exists() + { + match settings.merge(config::File::with_name("rusnapshot")) { + Ok(settings) => match settings.merge(config::Environment::with_prefix("RUSNAPSHOT")) { + Ok(settings) => settings + .clone() + .try_into::>() + .unwrap(), + Err(e) => { + eprintln!("Error merging environment variables into settings: {}", e); + std::process::exit(1) + } + }, + Err(e) => { + eprintln!("Error reading config file: {}", e); + std::process::exit(1) + } + } + } else { + match settings.merge(config::Environment::with_prefix("RUSNAPSHOT")) { + Ok(settings) => settings + .clone() + .try_into::>() + .unwrap(), + Err(e) => { + eprintln!("Error merging environment variables into settings: {}", e); + std::process::exit(1) + } + } + } +} + +fn return_value_or_default( + settings: &HashMap, + value: &str, + default_value: String, +) -> String { + settings.get(value).unwrap_or(&default_value).to_string() +} diff --git a/src/cli.yml b/src/cli.yml new file mode 100644 index 0000000..1417b97 --- /dev/null +++ b/src/cli.yml @@ -0,0 +1,88 @@ +name: Rusnapshot +author: Eduard Tolosa +settings: + - ArgRequiredElseHelp + - StrictUtf8 +about: Simple and handy btrfs snapshoting tool. +args: + - config-file: + help: Path to configuration file. + short: c + long: config + takes_value: true + multiple: false + + - dest-dir: + help: Directory where snapshots should be saved. + long: to + takes_value: true + multiple: false + + - source-dir: + help: Directory from where snapshots should be created. + long: from + takes_value: true + multiple: false + + - snapshot-id: + help: Snapshot id or name to work with. + long: id + takes_value: true + multiple: false + + - database-file: + help: Path to the SQLite database file. + short: d + long: dfile + takes_value: true + multiple: false + + - snapshot-prefix: + help: "Prefix for the snapshot name. Default: snapshot" + short: p + long: prefix + takes_value: true + multiple: false + + - create-snapshot: + help: Create an snapshot. + long: cr + takes_value: false + multiple: false + + - clean-snapshots: + help: "Enable snapshots cleaning, will keep only the last X snapshots specified with -k/--keep. WARNING: if -k/--keep is not specified, IT WILL DELETE ALL THE SNAPSHOTS." + long: clean + takes_value: false + multiple: false + + - delete-snapshot: + help: Delete an snapshot. + long: del + takes_value: false + multiple: false + requires: + - snapshot-id + + - restore-snapshot: + help: Restore an specific snapshot. + short: r + long: restore + takes_value: false + multiple: false + requires: + - snapshot-id + + - list-snapshots: + help: List the snapshots tracked in the database. + short: l + long: list + takes_value: false + multiple: false + + - keep-only: + help: Keep only the last X items. + short: k + long: keep + takes_value: true + multiple: false diff --git a/src/controller.rs b/src/controller.rs new file mode 100644 index 0000000..e576344 --- /dev/null +++ b/src/controller.rs @@ -0,0 +1,108 @@ +use { + crate::{database, errors::*, operations, structs::Args}, + chrono::Utc, + md5, + prettytable::{cell, row, Table}, +}; + +pub fn manage_creation(args: &mut Args) -> Result<()> { + let connection = sqlite::open(&args.database_file)?; + args.snapshot_name = format!( + "{}-{}", + args.snapshot_prefix, + Utc::now().format("%Y-%m-%d-%H-%M-%S") + ); + args.snapshot_id = format!("{:?}", md5::compute(&args.snapshot_name)); + if operations::take_snapshot(args) { + database::commit_to_database(&connection, args)? + } + drop(connection); + + Ok(()) +} + +pub fn manage_deletion(args: &mut Args) -> Result<()> { + let connection = sqlite::open(&args.database_file)?; + let snapshot_data = database::return_snapshot_data(&connection, args)?; + if !snapshot_data.snap_id.is_empty() { + args.snapshot_name = snapshot_data.destination + &snapshot_data.name; + } else { + eprintln!( + "Snapshot ID {} does not returned any data. Please double check the ID.", + args.snapshot_id + ) + } + if !args.snapshot_name.is_empty() && operations::del_snapshot(args) { + database::delete_from_database(&connection, args)? + } + drop(connection); + + Ok(()) +} + +pub fn manage_restoring(args: &mut Args) -> Result<()> { + let connection = sqlite::open(&args.database_file)?; + let snapshot_data = database::return_snapshot_data(&connection, args)?; + if !snapshot_data.snap_id.is_empty() { + args.snapshot_name = snapshot_data.destination + &snapshot_data.name; + args.source_dir = snapshot_data.source; + } else { + eprintln!( + "Snapshot ID {} does not returned any data. Please double check the ID.", + args.snapshot_id + ) + } + println!( + "ID: {}, NAME: {}, Rest Point: {}", + args.snapshot_id, args.snapshot_name, args.source_dir + ); + if !args.snapshot_name.is_empty() && operations::restore_snapshot(args) { + println!( + "The snapshot with ID {} was successfully restored to {}", + args.snapshot_id, args.source_dir + ) + } + drop(connection); + + Ok(()) +} + +pub fn manage_listing(args: &mut Args) -> Result<()> { + let connection = sqlite::open(&args.database_file)?; + let snaps_data = database::return_all_data(&connection)?; + + let mut table = Table::new(); + table.set_titles(row![ + bcFg => "NAME", + "ID", + "SOURCE DIR", + "DESTINATION DIR", + "DATE" + ]); + + for data in &snaps_data { + table.add_row(row![ d => + data.name, + data.snap_id, + data.source, + data.destination, + data.date, + ]); + } + table.printstd(); + drop(connection); + + Ok(()) +} + +pub fn keep_only_x(args: &mut Args) -> Result<()> { + let connection = sqlite::open(&args.database_file)?; + let snaps_data = database::return_only_x_items(&connection, args)?; + for data in &snaps_data { + args.snapshot_name = data.destination.clone() + &data.name; + args.snapshot_id = data.snap_id.clone(); + manage_deletion(args)? + } + + Ok(()) +} diff --git a/src/database.rs b/src/database.rs new file mode 100644 index 0000000..44abc99 --- /dev/null +++ b/src/database.rs @@ -0,0 +1,98 @@ +use { + crate::{ + errors::*, + structs::{Args, Database}, + }, + sqlite::{Connection, State}, +}; + +pub fn test_database(connection_str: &str) -> Result<()> { + let connection = sqlite::open(&connection_str)?; + drop(connection); + + Ok(()) +} + +pub fn setup_initial_database(connection: &Connection) -> Result<()> { + connection.execute("CREATE TABLE IF NOT EXISTS snapshots (name TEXT NOT NULL, snap_id TEXT NOT NULL, source TEXT NOT NULL, destination TEXT NOT NULL, date TEXT DEFAULT CURRENT_TIMESTAMP, PRIMARY KEY(name, snap_id))")?; + + Ok(()) +} + +pub fn commit_to_database(connection: &Connection, args: &Args) -> Result<()> { + let statement = format!( + "INSERT INTO snapshots (name, snap_id, source, destination) VALUES ('{}', '{}', '{}', '{}')", + args.snapshot_name, args.snapshot_id, args.source_dir, args.dest_dir + ); + connection.execute(&statement)?; + + Ok(()) +} + +pub fn delete_from_database(connection: &Connection, args: &Args) -> Result<()> { + let statement = format!( + "DELETE FROM snapshots WHERE name = '{}' OR snap_id = '{}'", + args.snapshot_id, args.snapshot_id + ); + connection.execute(&statement)?; + + Ok(()) +} + +pub fn return_snapshot_data(connection: &Connection, args: &Args) -> Result { + let mut statement = connection.prepare(format!( + "SELECT * FROM snapshots WHERE name = '{}' OR snap_id = '{}'", + args.snapshot_id, args.snapshot_id + ))?; + let mut snap_data = Database::default(); + + while let State::Row = statement.next()? { + snap_data.name = statement.read::(0).unwrap(); + snap_data.snap_id = statement.read::(1).unwrap(); + snap_data.source = statement.read::(2).unwrap(); + snap_data.destination = statement.read::(3).unwrap(); + snap_data.date = statement.read::(4).unwrap(); + } + + Ok(snap_data) +} + +pub fn return_all_data(connection: &Connection) -> Result> { + let mut snapshots_data: Vec = Vec::new(); + + let mut statement = connection.prepare("SELECT * FROM snapshots ORDER BY date DESC")?; + + while let State::Row = statement.next()? { + let mut db_struct = Database::default(); + + db_struct.name = statement.read::(0).unwrap(); + db_struct.snap_id = statement.read::(1).unwrap(); + db_struct.source = statement.read::(2).unwrap(); + db_struct.destination = statement.read::(3).unwrap(); + db_struct.date = statement.read::(4).unwrap(); + + snapshots_data.push(db_struct); + } + + Ok(snapshots_data) +} + +pub fn return_only_x_items(connection: &Connection, args: &Args) -> Result> { + let mut snapshots_data: Vec = Vec::new(); + + let mut statement = connection.prepare(&format!("SELECT name,snap_id,source,destination,date FROM (SELECT row_number() over(ORDER BY date DESC) n,* from snapshots) WHERE n > {} AND name LIKE '{}%'", args.keep_only, args.snapshot_prefix))?; + + while let State::Row = statement.next()? { + let mut db_struct = Database::default(); + + db_struct.name = statement.read::(0).unwrap(); + db_struct.snap_id = statement.read::(1).unwrap(); + db_struct.source = statement.read::(2).unwrap(); + db_struct.destination = statement.read::(3).unwrap(); + db_struct.date = statement.read::(4).unwrap(); + + snapshots_data.push(db_struct); + } + + Ok(snapshots_data) +} diff --git a/src/errors.rs b/src/errors.rs new file mode 100644 index 0000000..245cff2 --- /dev/null +++ b/src/errors.rs @@ -0,0 +1,2 @@ +pub use failure::{Error, ResultExt}; +pub type Result = ::std::result::Result; diff --git a/src/lib.rs b/src/lib.rs new file mode 100644 index 0000000..45d64eb --- /dev/null +++ b/src/lib.rs @@ -0,0 +1,6 @@ +pub mod args; +pub mod controller; +pub mod database; +pub mod errors; +mod operations; +mod structs; diff --git a/src/main.rs b/src/main.rs new file mode 100644 index 0000000..91b4af0 --- /dev/null +++ b/src/main.rs @@ -0,0 +1,37 @@ +use { + rusnapshot::{args, controller, database, errors::*}, + sqlite, +}; + +fn run() -> Result<()> { + let mut arguments = args::get_args(); + database::test_database(&arguments.database_file)?; + database::setup_initial_database(&sqlite::open(&arguments.database_file)?)?; + + if arguments.create_snapshot { + controller::manage_creation(&mut arguments)? + } + if arguments.delete_snapshot { + controller::manage_deletion(&mut arguments)? + } + if arguments.list_snapshots { + controller::manage_listing(&mut arguments)? + } + if arguments.clean_snapshots { + controller::keep_only_x(&mut arguments)? + } + if arguments.restore_snapshot { + controller::manage_restoring(&mut arguments)? + } + Ok(()) +} + +fn main() { + if let Err(err) = run() { + eprintln!("\nError: {}", err); + for cause in err.iter_chain().skip(1) { + eprintln!("Error description: {}", cause); + } + std::process::exit(1); + } +} diff --git a/src/operations.rs b/src/operations.rs new file mode 100644 index 0000000..78a30b5 --- /dev/null +++ b/src/operations.rs @@ -0,0 +1,45 @@ +use { + crate::structs::Args, + std::{path::Path, process::Command}, +}; + +pub fn take_snapshot(args: &Args) -> bool { + Command::new("btrfs") + .args(&[ + "subvolume", + "snapshot", + "-r", + &args.source_dir, + &format!("{}/{}", args.dest_dir, args.snapshot_name), + ]) + .status() + .expect("Error while taking the snapshot.") + .success() +} + +pub fn del_snapshot(args: &Args) -> bool { + Command::new("btrfs") + .args(&["subvolume", "delete", &args.snapshot_name]) + .status() + .expect("Error deleting the snapshot.") + .success() +} + +pub fn restore_snapshot(args: &Args) -> bool { + (!Path::new(&args.source_dir).exists() + || Command::new("btrfs") + .args(&["subvolume", "delete", &args.source_dir]) + .status() + .expect("Error deleting the subvolume.") + .success()) + && Command::new("btrfs") + .args(&[ + "subvolume", + "snapshot", + &args.snapshot_name, + &args.source_dir, + ]) + .status() + .expect("Error restoring the snapshot.") + .success() +} diff --git a/src/structs.rs b/src/structs.rs new file mode 100644 index 0000000..5de5a73 --- /dev/null +++ b/src/structs.rs @@ -0,0 +1,35 @@ +#[derive(Clone, Debug)] +pub struct Args { + pub create_snapshot: bool, + pub delete_snapshot: bool, + pub list_snapshots: bool, + pub clean_snapshots: bool, + pub restore_snapshot: bool, + pub dest_dir: String, + pub source_dir: String, + pub database_file: String, + pub snapshot_name: String, + pub snapshot_id: String, + pub snapshot_prefix: String, + pub keep_only: usize, +} + +pub struct Database { + pub name: String, + pub snap_id: String, + pub source: String, + pub destination: String, + pub date: String, +} + +impl Database { + pub fn default() -> Database { + Database { + name: String::new(), + snap_id: String::new(), + source: String::new(), + destination: String::new(), + date: String::new(), + } + } +}