Рыба проекта. Минимальная функциональность

pkg/domain/pgdump/dumper.go

@@ -0,0 +1,50 @@
+package pgdump
+
+import (
+	"context"
+	"fmt"
+	"io"
+)
+
+// Options holds configuration for the pg_dump invocation.
+type Options struct {
+	Host          string
+	Port          int
+	Database      string
+	User          string
+	Password      string
+	Key           string
+	ExcludeTables []string
+}
+
+// Dumper defines the contract for executing pg_dump.
+type Dumper interface {
+	Dump(
+		ctx context.Context,
+		opts Options,
+		sink io.Writer,
+	) error
+}
+
+// pgDumpFailedError is returned when pg_dump exits with a non-zero status.
+type pgDumpFailedError struct {
+	exitCode int
+}
+
+func (e *pgDumpFailedError) Error() string {
+	return fmt.Sprintf("pg_dump failed with exit code %d", e.exitCode)
+}
+
+// Is reports whether target is a pgDumpFailedError with the same exit code.
+func (e *pgDumpFailedError) Is(target error) bool {
+	other, ok := target.(*pgDumpFailedError)
+	if !ok {
+		return false
+	}
+	return e.exitCode == other.exitCode
+}
+
+// ErrPgDumpFailed creates a new pg_dump failed error with the given exit code.
+func ErrPgDumpFailed(exitCode int) error {
+	return &pgDumpFailedError{exitCode: exitCode}
+}