Add hook to support Pro SQLite driver

Here, add a custom hook to SQLite driver procurement that can be used by
River Pro to inject some needed customization. A similar hook already
exists for Pgx V5. This was actually needed in v0.30.0 to work properly,
so I'll have to put in a patch release.

Author: brandur

CHANGELOG.md

@@ -7,6 +7,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Added
+
+- Added hook for River's CLI command framework that can be used to inject custom SQLite initialization. Used by River Pro. [PR #1369](https://github.com/riverqueue/river/pull/1369).
+
 ## [0.46.0] - 2026-08-29
 
 ### Added

cmd/river/rivercli/command.go

@@ -101,7 +101,12 @@ func RunCommand[TOpts CommandOpts](ctx context.Context, bundle *RunCommandBundle
 				}
 				defer dbPool.Close()
 
-				driverProcurer = &sqliteDriverProcurer{dbPool: dbPool}
+				driverProcurerSQLite, isSQLiteProcurer := driverProcurer.(DriverProcurerSQLite)
+				if driverProcurer != nil && isSQLiteProcurer {
+					driverProcurerSQLite.InitSQLite(dbPool)
+				} else {
+					driverProcurer = &sqliteDriverProcurer{dbPool: dbPool}
+				}
 
 			default:
 				return false, fmt.Errorf("unsupported database URL (`%s`); try one with a `postgres://`, `postgresql://`, or `sqlite://` scheme/prefix", *bundle.DatabaseURL)

cmd/river/rivercli/driver_procurer.go

@@ -23,10 +23,16 @@ type DriverProcurer interface {
 	QueryRow(ctx context.Context, sql string, args ...any) riverdriver.Row
 }
 
+// DriverProcurerPgxV5 optionally initializes a custom procurer with a pgx/v5 pool.
 type DriverProcurerPgxV5 interface {
 	InitPgxV5(pool *pgxpool.Pool)
 }
 
+// DriverProcurerSQLite optionally initializes a custom procurer with a SQLite pool.
+type DriverProcurerSQLite interface {
+	InitSQLite(pool *sql.DB)
+}
+
 // BenchmarkerInterface is an interface to a Benchmarker. Its reason for
 // existence is to wrap a benchmarker to strip it of its generic parameter,
 // letting us pass it around without having to know the transaction type.

cmd/river/rivercli/river_cli_test.go

@@ -4,6 +4,7 @@ import (
 	"bytes"
 	"cmp"
 	"context"
+	"database/sql"
 	"fmt"
 	"maps"
 	"net/url"
@@ -28,6 +29,7 @@ type DriverProcurerStub struct {
 	getBenchmarkerStub func(config *riverbench.Config) BenchmarkerInterface
 	getMigratorStub    func(config *rivermigrate.Config) (MigratorInterface, error)
 	initPgxV5Stub      func(pool *pgxpool.Pool)
+	initSQLiteStub     func(pool *sql.DB)
 	queryRowStub       func(ctx context.Context, sql string, args ...any) riverdriver.Row
 }
 
@@ -55,6 +57,14 @@ func (p *DriverProcurerStub) InitPgxV5(pool *pgxpool.Pool) {
 	p.initPgxV5Stub(pool)
 }
 
+func (p *DriverProcurerStub) InitSQLite(pool *sql.DB) {
+	if p.initSQLiteStub == nil {
+		panic("InitSQLite is not stubbed")
+	}
+
+	p.initSQLiteStub(pool)
+}
+
 func (p *DriverProcurerStub) QueryRow(ctx context.Context, sql string, args ...any) riverdriver.Row {
 	if p.queryRowStub == nil {
 		panic("QueryRow is not stubbed")
@@ -447,6 +457,52 @@ SELECT 'up 1' FROM river_table
 		`), strings.TrimSpace(out.String()))
 }
 
+func TestBaseCommandSetDriverProcurerSQLite(t *testing.T) {
+	t.Parallel()
+
+	getMigratorCalled := false
+	initSQLiteCalled := false
+
+	migratorStub := &MigratorStub{}
+	migratorStub.allVersionsStub = func() []rivermigrate.Migration { return []rivermigrate.Migration{testMigration01} }
+	migratorStub.getVersionStub = func(version int) (rivermigrate.Migration, error) {
+		if version == 1 {
+			return testMigration01, nil
+		}
+
+		return rivermigrate.Migration{}, fmt.Errorf("unknown version: %d", version)
+	}
+	migratorStub.existingVersionsStub = func(ctx context.Context) ([]rivermigrate.Migration, error) { return nil, nil }
+
+	cli := NewCLI(&Config{
+		DriverProcurer: &DriverProcurerStub{
+			getMigratorStub: func(config *rivermigrate.Config) (MigratorInterface, error) {
+				getMigratorCalled = true
+				return migratorStub, nil
+			},
+			initSQLiteStub: func(pool *sql.DB) {
+				initSQLiteCalled = true
+			},
+		},
+		Name: "River",
+	})
+
+	var out bytes.Buffer
+	cli.SetOut(&out)
+
+	cmd := cli.BaseCommandSet()
+	cmd.SetArgs([]string{"migrate-get", "--up", "--version", "1", "--database-url", "sqlite://"})
+	require.NoError(t, cmd.Execute())
+
+	require.True(t, getMigratorCalled)
+	require.True(t, initSQLiteCalled)
+
+	require.Equal(t, strings.TrimSpace(`
+-- River main migration 001 [up]
+SELECT 'up 1' FROM river_table
+		`), strings.TrimSpace(out.String()))
+}
+
 func TestMigrateGet(t *testing.T) {
 	t.Parallel()