Extract base environment (#149)

src-tauri/migrations/20241219140051_base-environments.sql

@@ -0,0 +1,45 @@
+-- Add the new field
+ALTER TABLE environments
+    ADD COLUMN environment_id TEXT REFERENCES environments (id) ON DELETE CASCADE;
+
+-- Create temporary column so we know which rows are meant to be base environments. We'll use this to update
+-- child environments to point to them.
+ALTER TABLE environments
+    ADD COLUMN migrated_base_env BOOLEAN DEFAULT FALSE NOT NULL;
+
+-- Create a base environment for each workspace
+INSERT INTO environments (id, workspace_id, name, variables, migrated_base_env)
+SELECT (
+           -- This is the best way to generate a random string in SQLite, apparently
+           'ev_' || SUBSTR('abcdefghijkmnopqrstuvwxyzABCDEFGHJKLMNPQRSTUVWXYZ23457789', (ABS(RANDOM()) % 57) + 1, 1) ||
+           SUBSTR('abcdefghijkmnopqrstuvwxyzABCDEFGHJKLMNPQRSTUVWXYZ23457789', (ABS(RANDOM()) % 57) + 1, 1) ||
+           SUBSTR('abcdefghijkmnopqrstuvwxyzABCDEFGHJKLMNPQRSTUVWXYZ23457789', (ABS(RANDOM()) % 57) + 1, 1) ||
+           SUBSTR('abcdefghijkmnopqrstuvwxyzABCDEFGHJKLMNPQRSTUVWXYZ23457789', (ABS(RANDOM()) % 57) + 1, 1) ||
+           SUBSTR('abcdefghijkmnopqrstuvwxyzABCDEFGHJKLMNPQRSTUVWXYZ23457789', (ABS(RANDOM()) % 57) + 1, 1) ||
+           SUBSTR('abcdefghijkmnopqrstuvwxyzABCDEFGHJKLMNPQRSTUVWXYZ23457789', (ABS(RANDOM()) % 57) + 1, 1) ||
+           SUBSTR('abcdefghijkmnopqrstuvwxyzABCDEFGHJKLMNPQRSTUVWXYZ23457789', (ABS(RANDOM()) % 57) + 1, 1) ||
+           SUBSTR('abcdefghijkmnopqrstuvwxyzABCDEFGHJKLMNPQRSTUVWXYZ23457789', (ABS(RANDOM()) % 57) + 1, 1) ||
+           SUBSTR('abcdefghijkmnopqrstuvwxyzABCDEFGHJKLMNPQRSTUVWXYZ23457789', (ABS(RANDOM()) % 57) + 1, 1) ||
+           SUBSTR('abcdefghijkmnopqrstuvwxyzABCDEFGHJKLMNPQRSTUVWXYZ23457789', (ABS(RANDOM()) % 57) + 1, 1)
+           ),
+       workspaces.id,
+       'Global Variables',
+       variables,
+       TRUE
+FROM workspaces;
+
+-- Update all non-base environments to point to newly created base environments
+UPDATE environments
+SET environment_id = ( SELECT base_env.id
+                       FROM environments AS base_env
+                       WHERE base_env.workspace_id = environments.workspace_id
+                         AND base_env.migrated_base_env IS TRUE )
+WHERE migrated_base_env IS FALSE;
+
+-- Drop temporary column
+ALTER TABLE environments
+    DROP COLUMN migrated_base_env;
+
+-- Drop the old variables column
+-- IMPORTANT: Skip to give the user the option to roll back to a previous app version. We can drop it once the migration working in the real world
+-- ALTER TABLE workspaces DROP COLUMN variables;