Initial commit

vm/errors.go

@@ -0,0 +1,31 @@
+package vm
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/AlexSSD7/vldisk/utils"
+	"github.com/pkg/errors"
+)
+
+var (
+	ErrSSHUnavailable = errors.New("ssh unavailable")
+)
+
+func wrapErrWithLog(err error, msg, log string) error {
+	return errors.Wrapf(err, "%v %v", msg, getLogErrMsg(log))
+}
+
+func getLogErrMsg(s string) string {
+	logToInclude := strings.ReplaceAll(s, "\n", "\\n")
+	logToInclude = strings.TrimSuffix(logToInclude, "\\n")
+	logToInclude = utils.ClearUnprintableChars(logToInclude)
+
+	origLogLen := len(logToInclude)
+	const maxLogLen = 256
+	if origLogLen > maxLogLen {
+		logToInclude = fmt.Sprintf("[%v chars trimmed]", origLogLen) + logToInclude[len(logToInclude)-maxLogLen:]
+	}
+
+	return fmt.Sprintf("(log: '%v')", logToInclude)
+}