Support nested directories

[bplunkett-stripe]

Description

Support nested directories, i.e., walk nested directories

Motivation

Fixes #155
Relates to #162

Testing

Validated on schema dir with nested folders:

  |-foobar.sql
  |-last
  |  |-nested
  |  |  |-fk.sql
  |-earlier_schema
  |  |-enum.sql

Execution order should be lexical order of file paths.

 go run ./cmd/pg-schema-diff plan --schema-dir ~/stripe/tempschema --dsn 'host=localhost user=bplunkett dbname=postgres'           INT х │ 00:37:34

################################ Generated plan ################################
1. CREATE TYPE "public"."mood" AS ENUM ('sad', 'ok', 'happy');
        -- Statement Timeout: 3s

2. CREATE TABLE "public"."fk" (
        "id" text COLLATE "pg_catalog"."default"
);
        -- Statement Timeout: 3s

3. ALTER TABLE "public"."foobar" ADD COLUMN "id" character varying(255) COLLATE "pg_catalog"."default";
        -- Statement Timeout: 3s

4. ALTER TABLE "public"."foobar" ADD COLUMN "mood" mood;
        -- Statement Timeout: 3s

5. CREATE UNIQUE INDEX CONCURRENTLY foobar_id_key ON public.foobar USING btree (id);
        -- Statement Timeout: 20m0s
        -- Lock Timeout: 3s
        -- Hazard INDEX_BUILD: This might affect database performance. Concurrent index builds require a non-trivial amount of CPU, potentially affecting database performance. They also can take a while but do not lock out writes.

6. ALTER TABLE "public"."foobar" ADD CONSTRAINT "foobar_id_key" UNIQUE USING INDEX "foobar_id_key";
        -- Statement Timeout: 3s

7. ALTER TABLE "public"."fk" ADD CONSTRAINT "fk_id_fkey" FOREIGN KEY (id) REFERENCES foobar(id) NOT VALID;
        -- Statement Timeout: 3s

8. ALTER TABLE "public"."fk" VALIDATE CONSTRAINT "fk_id_fkey";
        -- Statement Timeout: 3s

[bplunkett-stripe]

Unexport this