cleanup: remove go1.13 build tags and Makefile

tonistiigi · tonistiigi · commit 05fbace6d90c · 2026-03-27T08:10:21.000-07:00
Remove go1.13 build constraints from unwrap functions
since go.mod minimum is go1.20. Rename go113.go and
go113_test.go to unwrap.go and unwrap_test.go. Delete
Makefile as build/test/lint are now handled by Docker
Bake targets.

Signed-off-by: Tonis Tiigi &lt;tonistiigi@gmail.com&gt;
diff --git a/Makefile b/Makefile
diff --git a/bench_test.go b/bench_test.go
@@ -1,6 +1,3 @@
-//go:build go1.7
-// +build go1.7
-
 package errors
 
 import (
diff --git a/errors.go b/errors.go
@@ -159,7 +159,7 @@ type withStack struct {
 
 func (w *withStack) Cause() error { return w.error }
 
-// Unwrap provides compatibility for Go 1.13 error chains.
+// Unwrap provides compatibility for errors.Is and errors.As.
 func (w *withStack) Unwrap() error { return w.error }
 
 func (w *withStack) Format(s fmt.State, verb rune) {
@@ -244,7 +244,7 @@ type withMessage struct {
 func (w *withMessage) Error() string { return w.msg + ": " + w.cause.Error() }
 func (w *withMessage) Cause() error  { return w.cause }
 
-// Unwrap provides compatibility for Go 1.13 error chains.
+// Unwrap provides compatibility for errors.Is and errors.As.
 func (w *withMessage) Unwrap() error { return w.cause }
 
 func (w *withMessage) Format(s fmt.State, verb rune) {
diff --git a/unwrap.go b/unwrap.go
@@ -1,6 +1,3 @@
-//go:build go1.13
-// +build go1.13
-
 package errors
 
 import (
diff --git a/unwrap_test.go b/unwrap_test.go
@@ -1,6 +1,3 @@
-//go:build go1.13
-// +build go1.13
-
 package errors
 
 import (
