snapshot of https://github.com/sqlc-dev/sqlc.git (main, 2026-09-16; blobs > 131072B omitted)

internal/sqltest/docker/enabled.go

@@ -0,0 +1,23 @@
+package docker
+
+import (
+	"fmt"
+	"os/exec"
+
+	"golang.org/x/sync/singleflight"
+)
+
+var flight singleflight.Group
+
+func Installed() error {
+	if _, err := exec.LookPath("docker"); err != nil {
+		return fmt.Errorf("docker not found: %w", err)
+	}
+	// Verify the Docker daemon is actually running and accessible.
+	// Without this check, tests will try Docker, fail on docker pull,
+	// and t.Fatal instead of falling back to native database support.
+	if out, err := exec.Command("docker", "info").CombinedOutput(); err != nil {
+		return fmt.Errorf("docker daemon not available: %w\n%s", err, out)
+	}
+	return nil
+}

internal/sqltest/docker/mysql.go

@@ -0,0 +1,104 @@
+package docker
+
+import (
+	"context"
+	"database/sql"
+	"fmt"
+	"os/exec"
+	"strings"
+	"time"
+
+	_ "github.com/go-sql-driver/mysql"
+)
+
+var mysqlHost string
+
+func StartMySQLServer(c context.Context) (string, error) {
+	if err := Installed(); err != nil {
+		return "", err
+	}
+	if mysqlHost != "" {
+		return mysqlHost, nil
+	}
+	value, err, _ := flight.Do("mysql", func() (any, error) {
+		host, err := startMySQLServer(c)
+		if err != nil {
+			return "", err
+		}
+		mysqlHost = host
+		return host, nil
+	})
+	if err != nil {
+		return "", err
+	}
+	data, ok := value.(string)
+	if !ok {
+		return "", fmt.Errorf("returned value was not a string")
+	}
+	return data, nil
+}
+
+func startMySQLServer(c context.Context) (string, error) {
+	{
+		_, err := exec.Command("docker", "pull", "mysql:9").CombinedOutput()
+		if err != nil {
+			return "", fmt.Errorf("docker pull: mysql:9 %w", err)
+		}
+	}
+
+	var exists bool
+	{
+		cmd := exec.Command("docker", "container", "inspect", "sqlc_sqltest_docker_mysql")
+		// This means we've already started the container
+		exists = cmd.Run() == nil
+	}
+
+	if !exists {
+		cmd := exec.Command("docker", "run",
+			"--name", "sqlc_sqltest_docker_mysql",
+			"-e", "MYSQL_ROOT_PASSWORD=mysecretpassword",
+			"-e", "MYSQL_DATABASE=dinotest",
+			"-p", "3306:3306",
+			"-d",
+			"mysql:9",
+		)
+
+		output, err := cmd.CombinedOutput()
+		fmt.Println(string(output))
+
+		msg := `Conflict. The container name "/sqlc_sqltest_docker_mysql" is already in use by container`
+		if !strings.Contains(string(output), msg) && err != nil {
+			return "", err
+		}
+	}
+
+	ctx, cancel := context.WithTimeout(c, 10*time.Second)
+	defer cancel()
+
+	// Create a ticker that fires every 10ms
+	ticker := time.NewTicker(10 * time.Millisecond)
+	defer ticker.Stop()
+
+	uri := "root:mysecretpassword@/dinotest?multiStatements=true&parseTime=true"
+
+	db, err := sql.Open("mysql", uri)
+	if err != nil {
+		return "", fmt.Errorf("sql.Open: %w", err)
+	}
+
+	defer db.Close()
+
+	for {
+		select {
+		case <-ctx.Done():
+			return "", fmt.Errorf("timeout reached: %w", ctx.Err())
+
+		case <-ticker.C:
+			// Run your function here
+			if err := db.PingContext(ctx); err != nil {
+				continue
+			}
+			return uri, nil
+		}
+	}
+}

internal/sqltest/docker/postgres.go

@@ -0,0 +1,105 @@
+package docker
+
+import (
+	"context"
+	"fmt"
+	"log/slog"
+	"os/exec"
+	"strings"
+	"time"
+
+	"github.com/jackc/pgx/v5"
+)
+
+var postgresHost string
+
+func StartPostgreSQLServer(c context.Context) (string, error) {
+	if err := Installed(); err != nil {
+		return "", err
+	}
+	if postgresHost != "" {
+		return postgresHost, nil
+	}
+	value, err, _ := flight.Do("postgresql", func() (any, error) {
+		host, err := startPostgreSQLServer(c)
+		if err != nil {
+			return "", err
+		}
+		postgresHost = host
+		return host, err
+	})
+	if err != nil {
+		return "", err
+	}
+	data, ok := value.(string)
+	if !ok {
+		return "", fmt.Errorf("returned value was not a string")
+	}
+	return data, nil
+}
+
+func startPostgreSQLServer(c context.Context) (string, error) {
+	{
+		_, err := exec.Command("docker", "pull", "postgres:16").CombinedOutput()
+		if err != nil {
+			return "", fmt.Errorf("docker pull: postgres:16 %w", err)
+		}
+	}
+
+	uri := "postgres://postgres:mysecretpassword@localhost:5432/postgres?sslmode=disable"
+
+	var exists bool
+	{
+		cmd := exec.Command("docker", "container", "inspect", "sqlc_sqltest_docker_postgres")
+		// This means we've already started the container
+		exists = cmd.Run() == nil
+	}
+
+	if !exists {
+		cmd := exec.Command("docker", "run",
+			"--name", "sqlc_sqltest_docker_postgres",
+			"-e", "POSTGRES_PASSWORD=mysecretpassword",
+			"-e", "POSTGRES_USER=postgres",
+			"-p", "5432:5432",
+			"-d",
+			"postgres:16",
+			"-c", "max_connections=200",
+		)
+
+		output, err := cmd.CombinedOutput()
+		fmt.Println(string(output))
+
+		msg := `Conflict. The container name "/sqlc_sqltest_docker_postgres" is already in use by container`
+		if !strings.Contains(string(output), msg) && err != nil {
+			return "", err
+		}
+	}
+
+	ctx, cancel := context.WithTimeout(c, 5*time.Second)
+	defer cancel()
+
+	// Create a ticker that fires every 10ms
+	ticker := time.NewTicker(10 * time.Millisecond)
+	defer ticker.Stop()
+
+	for {
+		select {
+		case <-ctx.Done():
+			return "", fmt.Errorf("timeout reached: %w", ctx.Err())
+
+		case <-ticker.C:
+			// Run your function here
+			conn, err := pgx.Connect(ctx, uri)
+			if err != nil {
+				slog.Debug("sqltest", "connect", err)
+				continue
+			}
+			defer conn.Close(ctx)
+			if err := conn.Ping(ctx); err != nil {
+				slog.Error("sqltest", "ping", err)
+				continue
+			}
+			return uri, nil
+		}
+	}
+}