Merge pull request golang-migrate#1103 from Shion1305/shion/issue-1102

🧑‍💻 improve error message for invalid source, database, resolves: golang-migrate#1102

migrate.go

@@ -89,25 +89,25 @@ func New(sourceURL, databaseURL string) (*Migrate, error) {
 
 	sourceName, err := iurl.SchemeFromURL(sourceURL)
 	if err != nil {
-		return nil, err
+		return nil, fmt.Errorf("failed to parse scheme from source URL: %w", err)
 	}
 	m.sourceName = sourceName
 
 	databaseName, err := iurl.SchemeFromURL(databaseURL)
 	if err != nil {
-		return nil, err
+		return nil, fmt.Errorf("failed to parse scheme from database URL: %w", err)
 	}
 	m.databaseName = databaseName
 
 	sourceDrv, err := source.Open(sourceURL)
 	if err != nil {
-		return nil, err
+		return nil, fmt.Errorf("failed to open source, %q: %w", sourceURL, err)
 	}
 	m.sourceDrv = sourceDrv
 
 	databaseDrv, err := database.Open(databaseURL)
 	if err != nil {
-		return nil, err
+		return nil, fmt.Errorf("failed to open database, %q: %w", databaseURL, err)
 	}
 	m.databaseDrv = databaseDrv
 
@@ -131,7 +131,7 @@ func NewWithDatabaseInstance(sourceURL string, databaseName string, databaseInst
 
 	sourceDrv, err := source.Open(sourceURL)
 	if err != nil {
-		return nil, err
+		return nil, fmt.Errorf("failed to open source, %q: %w", sourceURL, err)
 	}
 	m.sourceDrv = sourceDrv
 
@@ -149,15 +149,15 @@ func NewWithSourceInstance(sourceName string, sourceInstance source.Driver, data
 
 	databaseName, err := iurl.SchemeFromURL(databaseURL)
 	if err != nil {
-		return nil, err
+		return nil, fmt.Errorf("failed to parse scheme from database URL: %w", err)
 	}
 	m.databaseName = databaseName
 
 	m.sourceName = sourceName
 
 	databaseDrv, err := database.Open(databaseURL)
 	if err != nil {
-		return nil, err
+		return nil, fmt.Errorf("failed to open database, %q: %w", databaseURL, err)
 	}
 	m.databaseDrv = databaseDrv