initial upload

2026-07-25 13:11:37 -05:00
commit 943ddb064f
25 changed files with 2586 additions and 0 deletions
@@ -0,0 +1,94 @@
+package main
+
+import (
+	"context"
+	"database/sql"
+	"fmt"
+	"log"
+	"os"
+	"path/filepath"
+	"sort"
+	"strconv"
+	"strings"
+	"time"
+
+	_ "github.com/go-sql-driver/mysql"
+)
+
+func main() {
+	dsn := os.Getenv("TAPM_DATABASE_DSN")
+	if dsn == "" {
+		log.Fatal("TAPM_DATABASE_DSN is required")
+	}
+	directory := os.Getenv("TAPM_MIGRATIONS_DIR")
+	if directory == "" {
+		directory = "/app/migrations"
+	}
+
+	db, err := sql.Open("mysql", dsn)
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer db.Close()
+
+	ctx, cancel := context.WithTimeout(context.Background(), 60*time.Second)
+	defer cancel()
+	if err := db.PingContext(ctx); err != nil {
+		log.Fatalf("database: %v", err)
+	}
+
+	var locked int
+	if err := db.QueryRowContext(ctx, `SELECT GET_LOCK('tapm_schema_migrations', 30)`).Scan(&locked); err != nil {
+		log.Fatal(err)
+	}
+	if locked != 1 {
+		log.Fatal("could not acquire migration lock")
+	}
+	defer db.ExecContext(context.Background(), `SELECT RELEASE_LOCK('tapm_schema_migrations')`)
+
+	if _, err := db.ExecContext(ctx, `CREATE TABLE IF NOT EXISTS schema_migrations (
+		version BIGINT UNSIGNED NOT NULL PRIMARY KEY,
+		applied_at TIMESTAMP(6) NOT NULL DEFAULT CURRENT_TIMESTAMP(6)
+	) ENGINE=InnoDB`); err != nil {
+		log.Fatal(err)
+	}
+
+	entries, err := os.ReadDir(directory)
+	if err != nil {
+		log.Fatal(err)
+	}
+	sort.Slice(entries, func(i, j int) bool { return entries[i].Name() < entries[j].Name() })
+	for _, entry := range entries {
+		if entry.IsDir() || !strings.HasSuffix(entry.Name(), ".sql") {
+			continue
+		}
+		versionText, _, ok := strings.Cut(entry.Name(), "_")
+		if !ok {
+			log.Fatalf("migration %q must begin with a numeric version and underscore", entry.Name())
+		}
+		version, err := strconv.ParseUint(versionText, 10, 64)
+		if err != nil {
+			log.Fatalf("migration %q: %v", entry.Name(), err)
+		}
+		var applied int
+		if err := db.QueryRowContext(
+			ctx,
+			`SELECT COUNT(*) FROM schema_migrations WHERE version = ?`,
+			version,
+		).Scan(&applied); err != nil {
+			log.Fatal(err)
+		}
+		if applied != 0 {
+			continue
+		}
+
+		body, err := os.ReadFile(filepath.Join(directory, entry.Name()))
+		if err != nil {
+			log.Fatal(err)
+		}
+		if _, err := db.ExecContext(ctx, string(body)); err != nil {
+			log.Fatalf("apply %s: %v", entry.Name(), err)
+		}
+		fmt.Printf("applied migration %s\n", entry.Name())
+	}
+}