Rename "store" to "dataset" in schema

src/migrations/20221024_initial_schema.sql

@@ -1,5 +1,5 @@
--- Simple key/value table describing _this_ store (not imported ones).
--- In particular, the key "local_store" should be the UUID of the store in this
+-- Simple key/value table describing _this_ dataset (not imported ones).
+-- In particular, the key "local_dataset" should be the UUID of the dataset in this
 -- directory.
 CREATE TABLE local_metadata(
     key TEXT PRIMARY KEY NOT NULL,
@@ -54,8 +54,8 @@ CREATE INDEX FK_user_machine ON user (machine);
 
 -- Stores and files (and directories)
 -- These are the primary objects tracked by nancy.
--- A store is a directory containing a file called nancy.db (e.g. the dir holding this database)
--- In order to reliably merge store entries (like when we have converging
+-- A dataset is a directory containing a file called nancy.db (e.g. the dir holding this database)
+-- In order to reliably merge dataset entries (like when we have converging
 -- dependencies), we need to deduplicate. The machine and path could match, for
 -- example if a database is created in one location then copied elsewhere,
 -- followed by regenerating the original database. In these cases, we would want
@@ -67,29 +67,29 @@ CREATE INDEX FK_user_machine ON user (machine);
 -- Client code should generate random UUIDs in the RFC 4122 variant layout.
 -- https://datatracker.ietf.org/doc/html/rfc4122.html
 -- This is possible in Python by simply calling uuid.uuid4() with no arguments
-CREATE TABLE store (
+CREATE TABLE dataset (
     uuid BLOB PRIMARY KEY NOT NULL -- UUID generated by uuid.uuid4()
 );
 
 
 -- The filedir table holds all files and directories that are tracked by the
--- store. This table also holds tracked files and directories that have been
--- imported and live outside the current store.
+-- dataset. This table also holds tracked files and directories that have been
+-- imported and live outside the current dataset.
 -- We do not support renaming files.
 CREATE TABLE filedir (
     sha256 BLOB PRIMARY KEY NOT NULL,
-    store BLOB NOT NULL REFERENCES store ON UPDATE CASCADE,
+    dataset BLOB NOT NULL REFERENCES dataset ON UPDATE CASCADE,
     name TEXT,  -- only a filename, not a path
     parent BLOB REFERENCES filedir ON UPDATE CASCADE,
-    UNIQUE(store, name, parent)
+    UNIQUE(dataset, name, parent)
 );
-CREATE INDEX FK_filedir_store ON filedir (store);
+CREATE INDEX FK_filedir_dataset ON filedir (dataset);
 CREATE INDEX FK_filedir_parent ON filedir (parent);
--- Detect cross-store references
+-- Detect cross-dataset references
 CREATE TRIGGER insert_filedir BEFORE INSERT ON filedir
 BEGIN SELECT CASE
-    WHEN NEW.parent IS NOT NULL AND NEW.store != (SELECT store FROM filedir WHERE sha256 = NEW.parent)
-        THEN RAISE (ABORT, 'Parent resides in different store')
+    WHEN NEW.parent IS NOT NULL AND NEW.dataset != (SELECT dataset FROM filedir WHERE sha256 = NEW.parent)
+        THEN RAISE (ABORT, 'Parent resides in different dataset')
 END; END;
 CREATE TRIGGER update_filedir BEFORE UPDATE ON filedir
 BEGIN
@@ -112,12 +112,8 @@ CREATE TABLE filedir_version (
 
     -- Note that changing filetype (e.g. directory becomes file) or deleting a
     -- file are simply just new versions of a filedir.
-    filetype TEXT, -- One of 'LNK', 'DIR', 'REG', etc. See store.FSEntry.from_path for details
+    filetype TEXT, -- One of 'LNK', 'DIR', 'REG', etc.
     deleted BOOL NOT NULL,  -- set True when recording a deleted file
-
-    -- We record the permissions on each file to enable fixing if needed
-    perms TEXT, -- stat.filemode(os.stat(path).st_mode): '-rw-rw-r--'
-
     symlink_target TEXT, -- if this is a symlink, this is the (read but not fully resolved) target. i.e. this is the "content" of the symlink.
 
     -- The following hash can be NULL if the file was deleted. It could also be