feat: custom error codes (#1114)

errors/errors_taskfile.go

@@ -0,0 +1,51 @@
+package errors
+
+import (
+	"fmt"
+)
+
+// TaskfileNotFoundError is returned when no appropriate Taskfile is found when
+// searching the filesystem.
+type TaskfileNotFoundError struct {
+	Dir  string
+	Walk bool
+}
+
+func (err TaskfileNotFoundError) Error() string {
+	var walkText string
+	if err.Walk {
+		walkText = " (or any of the parent directories)"
+	}
+	return fmt.Sprintf(`task: No Taskfile found in "%s"%s. Use "task --init" to create a new one`, err.Dir, walkText)
+}
+
+func (err TaskfileNotFoundError) Code() int {
+	return CodeTaskfileNotFound
+}
+
+// TaskfileAlreadyExistsError is returned on creating a Taskfile if one already
+// exists.
+type TaskfileAlreadyExistsError struct{}
+
+func (err TaskfileAlreadyExistsError) Error() string {
+	return "task: A Taskfile already exists"
+}
+
+func (err TaskfileAlreadyExistsError) Code() int {
+	return CodeTaskfileAlreadyExists
+}
+
+// TaskfileInvalidError is returned when the Taskfile contains syntax errors or
+// cannot be parsed for some reason.
+type TaskfileInvalidError struct {
+	FilePath string
+	Err      error
+}
+
+func (err TaskfileInvalidError) Error() string {
+	return fmt.Sprintf("task: Failed to parse %s:\n%v", err.FilePath, err.Err)
+}
+
+func (err TaskfileInvalidError) Code() int {
+	return CodeTaskfileInvalid
+}