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feat: ADR-0006 §8 step 6 — .snapshots/ gitignore + export + cleanup

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The undo ring is local working state, handled at all three
project-file seams (R13):
- .gitignore template ignores /.snapshots/
- export excludes .snapshots/ (like playground.db / history.log)
- safely_delete_temp_project allowlists .snapshots/ so a temp that
  was modified then undone back to empty stays auto-deletable
- undo::SNAPSHOTS_DIR is now a pub const referenced by all three
- tests: gitignore content, export exclusion, cleanup allowlist

1693 passed / 0 failed / 1 ignored; clippy clean.
This commit is contained in:
claude@clouddev1
2026-05-24 20:53:00 +00:00
parent 25800e3eb5
commit d6c5674bf5
5 changed files with 56 additions and 4 deletions
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src/project/mod.rs
+10 -3
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@@ -416,10 +416,12 @@ impl Project {
write_if_missing(&path.join(PROJECT_YAML), &yaml)?;
// .gitignore template (ADR-0015 §11). Excludes the
// derived `.db`, the per-process lock, and migration
// backups. `history.log` is intentionally NOT ignored
// derived `.db`, the per-process lock, migration backups,
// and the undo snapshot ring (ADR-0006 Amendment 1 — local
// working state). `history.log` is intentionally NOT ignored
// (ADR-0007 amendment 1: per-user choice).
let gitignore = "/playground.db\n/.rdbms-playground.lock\n/project.yaml.v*.bak\n";
let gitignore =
"/playground.db\n/.rdbms-playground.lock\n/project.yaml.v*.bak\n/.snapshots/\n";
write_if_missing(&path.join(GITIGNORE), gitignore)?;
Ok(())
@@ -502,6 +504,10 @@ const ALLOWED_PROJECT_ENTRIES: &[&str] = &[
PLAYGROUND_DB,
GITIGNORE,
".rdbms-playground.lock",
// Undo snapshot ring (ADR-0006 Amendment 1): a temp that was
// modified then undone back to empty can still carry this, and
// must remain auto-deletable.
crate::undo::SNAPSHOTS_DIR,
];
/// Reasons `safely_delete_temp_project` refuses to delete a
@@ -841,6 +847,7 @@ mod tests {
let gi = fs::read_to_string(path.join(GITIGNORE)).unwrap();
assert!(gi.contains("/playground.db"));
assert!(gi.contains("/.rdbms-playground.lock"));
assert!(gi.contains("/.snapshots/"), "undo ring should be ignored");
assert!(!gi.contains("history.log"), "history.log should NOT be ignored");
}