Fix seeding (and guess more passwords)

src/migration/migration.go

@@ -365,14 +365,13 @@ func ResetDB() {
 
 	// Create the HMN database user
 	{
-		type pgCredentials struct {
-			User     string
-			Password string
-		}
-		credentials := []pgCredentials{
-			{config.Config.Postgres.User, config.Config.Postgres.Password}, // Existing HMN user
-			{getSystemUsername(), ""},                                      // Postgres.app on Mac
-		}
+		credentials := append(
+			[]pgCredentials{
+				{config.Config.Postgres.User, config.Config.Postgres.Password, false}, // Existing HMN user
+				{getSystemUsername(), "", true},                                       // Postgres.app on Mac
+			},
+			guessCredentials()...,
+		)
 
 		var workingCred pgCredentials
 		var createUserConn *pgconn.PgConn
@@ -383,6 +382,9 @@ func ResetDB() {
 			createUserConn, err = connectLowLevel(ctx, cred.User, cred.Password)
 			if err == nil {
 				workingCred = cred
+				if cred.SafeToPrint {
+					fmt.Printf("Connected by guessing username \"%s\" and password \"%s\".\n", cred.User, cred.Password)
+				}
 				break
 			} else {
 				connErrors = append(connErrors, err)
@@ -490,3 +492,22 @@ func getSystemUsername() string {
 	}
 	return u.Username
 }
+
+type pgCredentials struct {
+	User        string
+	Password    string
+	SafeToPrint bool
+}
+
+var commonRootUsernames = []string{getSystemUsername(), "postgres", "root"}
+var commonRootPasswords = []string{"", "password", "postgres"}
+
+func guessCredentials() []pgCredentials {
+	var result []pgCredentials
+	for _, username := range commonRootUsernames {
+		for _, password := range commonRootPasswords {
+			result = append(result, pgCredentials{username, password, true})
+		}
+	}
+	return result
+}

src/migration/seed.go

@@ -178,7 +178,7 @@ func seedUser(ctx context.Context, conn db.ConnOrTx, input models.User) *models.
 			status,
 			name, bio, blurb, signature,
 			darktheme,
-			showemail, edit_library,
+			showemail,
 			date_joined, registration_ip, avatar_asset_id
 		)
 		VALUES (
@@ -187,7 +187,7 @@ func seedUser(ctx context.Context, conn db.ConnOrTx, input models.User) *models.
 			$5,
 			$6, $7, $8, $9,
 			TRUE,
-			$10, FALSE,
+			$10,
 			'2017-01-01T00:00:00Z', '192.168.2.1', null
 		)
 		RETURNING $columns