| 1 | package main |
| 2 | |
| 3 | import ( |
| 4 | "crypto/sha256" |
| 5 | "database/sql" |
| 6 | "encoding/json" |
| 7 | "errors" |
| 8 | "fmt" |
| 9 | "log" |
| 10 | "net/url" |
| 11 | "os" |
| 12 | "path/filepath" |
| 13 | "sort" |
| 14 | "strings" |
| 15 | "time" |
| 16 | |
| 17 | "github.com/go-sql-driver/mysql" |
| 18 | ) |
| 19 | |
| 20 | // MySQL auto-commits DDL statement-by-statement (there's no transactional DDL |
| 21 | // like Postgres), so a migration killed mid-file can leave some of its |
| 22 | // statements already applied even though the file was never recorded as |
| 23 | // migrated. Re-running that file from the top then fails with "duplicate |
| 24 | // column" / "table already exists" instead of finishing the job. Treat those |
| 25 | // specific errors as already-applied and keep going. |
| 26 | var alreadyAppliedErrnos = map[ |
| 27 | 1050: true, // |
| 28 | 1060: true, // |
| 29 | 1061: true, // |
| 30 | 1091: true, // |
| 31 | 1826: true, // |
| 32 | } |
| 33 | |
| 34 | type journalEntry struct { |
| 35 | Idx int `json:"idx" |
| 36 | Tag string `json:"tag" |
| 37 | } |
| 38 | |
| 39 | type journal struct { |
| 40 | Entries []journalEntry |
| 41 | } |
| 42 | |
| 43 | func main() { |
| 44 | rawDSN := os. |
| 45 | if rawDSN == "" |
| 46 | log.Fatal("[migrate] DATABASE_URL is not set |
| 47 | } |
| 48 | |
| 49 | migrationsDir := os. |
| 50 | if migrationsDir == "" |
| 51 | migrationsDir = "./migrations" |
| 52 | } |
| 53 | |
| 54 | dsn, err := |
| 55 | if err != nil |
| 56 | log.Fatalf("[migrate] invalid DATABASE_URL: |
| 57 | } |
| 58 | |
| 59 | db, err := |
| 60 | if err != nil |
| 61 | log.Fatalf("[migrate] failed to open database: |
| 62 | } |
| 63 | defer db.Close() |
| 64 | |
| 65 | if err := db |
| 66 | log.Fatalf("[migrate] failed to connect to database: |
| 67 | } |
| 68 | |
| 69 | if err := ensureMigrationsTable |
| 70 | log.Fatalf("[migrate] failed to create migrations table: |
| 71 | } |
| 72 | |
| 73 | j, err := |
| 74 | if err != nil |
| 75 | log.Fatalf("[migrate] failed to read journal: |
| 76 | } |
| 77 | |
| 78 | log.Println("[migrate] running migrations... |
| 79 | for _, entry |
| 80 | if err := applyMigration |
| 81 | log.Fatalf("[migrate] |
| 82 | } |
| 83 | } |
| 84 | log.Println("[migrate] done |
| 85 | } |
| 86 | |
| 87 | func ensureMigrationsTable(db * |
| 88 | _, err := |
| 89 | CREATE TABLE IF NOT EXISTS __drizzle_migrations ( |
| 90 | id SERIAL PRIMARY KEY, |
| 91 | hash text NOT NULL, |
| 92 | created_at bigint |
| 93 | )`) |
| 94 | return err |
| 95 | } |
| 96 | |
| 97 | func readJournal(dir string |
| 98 | data, err := |
| 99 | if err != nil |
| 100 | return nil, err |
| 101 | } |
| 102 | var j journal |
| 103 | if err := json |
| 104 | return nil, err |
| 105 | } |
| 106 | sort.Slice(j |
| 107 | return j.Entries[ |
| 108 | }) |
| 109 | return &j, nil |
| 110 | } |
| 111 | |
| 112 | func applyMigration(db * |
| 113 | if strings.ContainsAny( |
| 114 | return fmt.Errorf( |
| 115 | } |
| 116 | content, err := |
| 117 | if err != nil |
| 118 | return fmt.Errorf( |
| 119 | } |
| 120 | |
| 121 | sum := sha256. |
| 122 | hash := fmt. |
| 123 | |
| 124 | var count int |
| 125 | if err := db |
| 126 | return err |
| 127 | } |
| 128 | if count > 0 |
| 129 | log.Printf("[migrate] skip |
| 130 | return nil |
| 131 | } |
| 132 | |
| 133 | log.Printf("[migrate] applying |
| 134 | |
| 135 | for _, stmt |
| 136 | if _, err |
| 137 | var mysqlErr *mysql |
| 138 | if errors.As( |
| 139 | log.Printf("[migrate] skipping already-applied statement in |
| 140 | continue |
| 141 | } |
| 142 | return fmt.Errorf( |
| 143 | } |
| 144 | } |
| 145 | |
| 146 | _, err = |
| 147 | hash, time.Now |
| 148 | if err != nil |
| 149 | return fmt.Errorf( |
| 150 | } |
| 151 | return nil |
| 152 | } |
| 153 | |
| 154 | // splitStatements splits a Drizzle SQL file on --> statement-breakpoint markers. |
| 155 | func splitStatements(sql string |
| 156 | parts := strings. |
| 157 | var out []string |
| 158 | for _, p |
| 159 | if s := strings |
| 160 | out = append( |
| 161 | } |
| 162 | } |
| 163 | return out |
| 164 | } |
| 165 | |
| 166 | // toDSN converts a mysql:// URL to go-sql-driver DSN format and ensures parseTime=true. |
| 167 | func toDSN(raw string |
| 168 | if !strings.HasPrefix |
| 169 | if !strings.Contains |
| 170 | if strings.Contains( |
| 171 | return raw + " |
| 172 | } |
| 173 | return raw + " |
| 174 | } |
| 175 | return raw, nil |
| 176 | } |
| 177 | u, err := |
| 178 | if err != nil |
| 179 | return "", err |
| 180 | } |
| 181 | pass, _ := |
| 182 | params := u. |
| 183 | if !strings.Contains |
| 184 | if params != "" |
| 185 | params += "&parseTime=true" |
| 186 | } else { |
| 187 | params = "parseTime=true" |
| 188 | } |
| 189 | } |
| 190 | return fmt.Sprintf( |
| 191 | } |