P2 slice 7: backups and restore (D-30, D-31)
The server backs each book up itself: a per-book git archive, pushed fast-forward only to a git remote and to a folder, when the books open, after a quiet spell, before they close and on request; every commit, push and drill is a record in ops/backup.jsonl. Drills clone each target and verify the chain, the blobs, the vault and the head, weekly and after a failure. `wanderbooks books restore` previews, then restores beside or (with --replace) over, never moving books something holds. The archive refuses anything but a plain bare repository and pins git against the owner's configuration. books.backup and books.back_up_now for the agent. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01T3gXMVt7XJPi6ens1or9Dj
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@@ -19,8 +19,7 @@ use std::time::{Duration, Instant};
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/// Short timings for tests (the defaults are the plan's), and agents'
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/// tokens kept in files in the test root, not this computer's keyring.
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const KNOBS: &str =
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"close_after=2500,backoff=50,exe_poll=100,init_wait=5000,queue_wait=30000,file_keyring=1";
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const KNOBS: &str = "close_after=2500,backoff=50,exe_poll=100,init_wait=5000,queue_wait=30000,file_keyring=1,backup_quiet=300";
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/// A home with a data root, and the program the tests run (possibly a
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/// copy, for restarts).
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@@ -921,17 +920,13 @@ fn the_lease_socket_takes_only_the_owners_intents() {
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"{\"proto\":1,\"intent\":{\"consent_format_upgrade\":{\"book\":\"acme\"}}}\n",
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"passphrase",
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),
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(
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"{\"proto\":1,\"intent\":{\"restore\":{\"staged\":\"s1\",\"replace\":\"acme\"}}}\n",
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"passphrase",
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),
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(
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"{\"proto\":1,\"intent\":{\"back_up_now\":{\"book\":\"acme\"}}}\n",
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"isn't built yet",
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"books.back_up_now",
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),
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(
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"{\"proto\":1,\"intent\":{\"restore\":{\"staged\":\"s1\"}}}\n",
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"isn't built yet",
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"{\"proto\":1,\"intent\":{\"restore\":{\"source\":\"/x\",\"id\":\"acme\",\"replace\":true}}}\n",
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"wanderbooks books restore",
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),
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(
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"{\"proto\":1,\"intent\":{\"new_books\":{\"id\":\"beta\",\"currency\":\"USD\"}}}\n",
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@@ -2346,3 +2341,126 @@ fn the_commands_given_run_as_the_agents_own_token() {
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assert!(String::from_utf8_lossy(&out.stderr).contains("isn't UTF-8"));
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a.end();
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}
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#[test]
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fn a_backup_is_restored_from_the_command_line() {
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let home = Home::new("restore");
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home.create("acme");
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let disk = home.dir.path().join("disk");
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std::fs::create_dir(&disk).unwrap();
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let mut a = Agent::start(&home, "acme");
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a.initialize();
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chart(&mut a);
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post_one(&mut a, 1).unwrap();
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a.call(
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"books.set_setting",
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json!({"changes": [{"key": "backup.folder", "value": disk.display().to_string()}],
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"decided_by": "Test Owner"}),
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)
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.unwrap();
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// Backed up by the server alone, soon after (the host passed on its
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// quiet).
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let mut s = Value::Null;
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assert!(
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wait_for(30, || {
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s = a.call("books.backup", json!({})).unwrap();
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s["targets"][0]["through_seq"] == s["head_seq"]
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}),
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"never backed up: {s}"
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);
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assert_eq!(s["targets"][0]["last_error"], Value::Null, "{s}");
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let head = s["head_seq"].as_u64().unwrap();
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let backup = disk.join("acme.git");
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let backup = backup.to_str().unwrap();
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// Previewed, and not done without a yes.
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let out = home.books(&["restore", backup, "--id", "copy"]);
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let said = String::from_utf8_lossy(&out.stdout);
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assert!(said.contains(&format!("through event {head}")), "{out:?}");
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assert!(
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String::from_utf8_lossy(&out.stderr).contains("confirm at a terminal"),
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"{out:?}"
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);
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assert_eq!(out.status.code(), Some(1));
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// Under its own name, over books that exist: refused.
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let out = home.books(&["restore", backup, "--yes"]);
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assert!(
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String::from_utf8_lossy(&out.stderr).contains("already books called"),
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"{out:?}"
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);
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// A repository named otherwise: restored as the books it holds, by
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// default (here: over those, refused), said.
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let renamed = home.dir.path().join("disk").join("fernhill-backup.git");
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let out = Command::new("git")
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.args(["clone", "-q", "--bare"])
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.arg(backup)
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.arg(&renamed)
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.output()
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.unwrap();
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assert!(out.status.success(), "{out:?}");
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let out = home.books(&["restore", renamed.to_str().unwrap(), "--yes"]);
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assert!(
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String::from_utf8_lossy(&out.stderr).contains("already books called \"acme\""),
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"{out:?}"
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);
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let out = home.books(&["restore", renamed.to_str().unwrap(), "--id", "other"]);
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let said = String::from_utf8_lossy(&out.stdout);
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assert!(
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said.contains("It is a backup of the books \"acme\""),
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"{out:?}"
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);
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assert!(said.contains("--id acme"), "{out:?}");
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// A repository whose name is no id: still restored as its books.
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let odd = home.dir.path().join("disk").join("Fernhill_Backup.git");
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std::fs::rename(&renamed, &odd).unwrap();
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let out = home.books(&["restore", odd.to_str().unwrap(), "--yes"]);
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assert!(
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String::from_utf8_lossy(&out.stderr).contains("already books called \"acme\""),
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"{out:?}"
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);
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std::fs::rename(&odd, &renamed).unwrap();
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// Beside them.
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let out = home.books(&["restore", backup, "--id", "copy", "--yes"]);
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assert!(out.status.success(), "{out:?}");
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assert!(
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String::from_utf8_lossy(&out.stdout).contains("Restored as \"copy\""),
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"{out:?}"
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);
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// Replacing them, the old kept: from the repository named otherwise,
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// given no id (the books it holds are replaced).
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post_one(&mut a, 2).unwrap();
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let out = home.books(&["restore", renamed.to_str().unwrap(), "--replace", "--yes"]);
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assert!(out.status.success(), "{out:?}");
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let said = String::from_utf8_lossy(&out.stdout);
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assert!(
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said.contains("kept in the legacy folder as acme-"),
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"{out:?}"
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);
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// The head it restored (post 2 may have been backed up by then).
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let restored: u64 = said
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.split("Restored as \"acme\": through event ")
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.nth(1)
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.and_then(|rest| rest.split(' ').next())
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.and_then(|n| n.parse().ok())
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.expect("the restored head is said");
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assert!(restored >= head, "{said}");
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let head = restored;
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assert!(!said.contains(&home.root().display().to_string()), "{said}");
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let out = home.books(&["list"]);
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let listed = String::from_utf8_lossy(&out.stdout);
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assert!(
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listed.contains("acme open") && listed.contains("copy open"),
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"{out:?}"
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);
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// The session of before never reaches the books replaced: refused, or
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// (its bridge opening a new session) the restored books.
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if let Ok(start) = a.call("books.start", json!({})) {
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assert_eq!(start["head"]["seq"].as_u64(), Some(head), "{start}");
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}
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a.end();
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// A new session sees the restored books, at the backup's head.
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let mut fresh = Agent::start(&home, "acme");
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fresh.initialize();
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let start = fresh.call("books.start", json!({})).unwrap();
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assert_eq!(start["head"]["seq"].as_u64(), Some(head), "{start}");
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fresh.end();
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}
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