Initial public release of Warp.

Repo-Sync-Origin: warpdotdev/warp-internal@12af1d983b

crates/persistence/migrations/2021-11-03-015315_add_panes/up.sql

@@ -0,0 +1,33 @@
+CREATE TABLE pane_nodes (
+  id INTEGER PRIMARY KEY NOT NULL,
+  tab_id INTEGER NOT NULL REFERENCES tabs(id),
+  parent_pane_node_id INTEGER REFERENCES pane_nodes(id),
+  flex FLOAT,
+  is_leaf BOOLEAN NOT NULL,
+  CONSTRAINT root_or_has_parent CHECK (
+	parent_pane_node_id IS NULL AND flex IS NULL
+	OR parent_pane_node_id IS NOT NULL AND flex IS NOT NULL
+  )
+);
+
+CREATE TABLE pane_branches (
+  id INTEGER PRIMARY KEY NOT NULL,
+  pane_node_id INTEGER NOT NULL UNIQUE REFERENCES pane_nodes(id),
+  horizontal BOOLEAN NOT NULL
+);
+
+CREATE TABLE pane_leaves (
+  id INTEGER PRIMARY KEY NOT NULL,
+  pane_node_id INTEGER NOT NULL UNIQUE REFERENCES pane_nodes(id),
+  cwd TEXT
+);
+
+-- Migrate the same tabs data into a pane structure (i.e. each tab has a single
+-- pane node that's a leaf).
+INSERT INTO pane_nodes (tab_id, is_leaf)
+SELECT id AS tab_id, TRUE from tabs;
+
+INSERT INTO pane_leaves (pane_node_id, cwd)
+SELECT pane_nodes.id AS pane_node_id, cwd from tabs JOIN pane_nodes ON tab_id = tabs.id;
+
+ALTER TABLE tabs DROP COLUMN cwd;