From 00c6b47d99b60aca4f5739f8b6400e8a5462ca23 Mon Sep 17 00:00:00 2001
From: Mads Jensen <atombrella@users.noreply.github.com>
Date: Sat, 3 Jan 2026 18:45:45 +0100
Subject: [PATCH] Maintain old error names for backwards compatibility

Signed-off-by: Mads Jensen <atombrella@users.noreply.github.com>
---
 pkg/chart/common/errors.go           | 15 +++++++++++++++
 pkg/chart/v2/lint/support/message.go |  3 +++
 pkg/downloader/manager.go            |  2 ++
 pkg/downloader/manager_test.go       |  2 +-
 4 files changed, 21 insertions(+), 1 deletion(-)

diff --git a/pkg/chart/common/errors.go b/pkg/chart/common/errors.go
index b6c99e7a5..4525588ce 100644
--- a/pkg/chart/common/errors.go
+++ b/pkg/chart/common/errors.go
@@ -20,6 +20,11 @@ import (
 	"fmt"
 )
 
+// ErrNoTable exists due to compatibilty with API users
+//
+//nolint:errname
+type ErrNoTable = NoTableError
+
 // NoTableError indicates that a chart does not have a matching table.
 type NoTableError struct {
 	Key string
@@ -27,6 +32,11 @@ type NoTableError struct {
 
 func (e NoTableError) Error() string { return fmt.Sprintf("%q is not a table", e.Key) }
 
+// ErrNoValue exists due to compatibilty with API users
+//
+//nolint:errname
+type ErrNoValue = NoValueError
+
 // NoValueError indicates that Values does not contain a key with a value
 type NoValueError struct {
 	Key string
@@ -34,6 +44,11 @@ type NoValueError struct {
 
 func (e NoValueError) Error() string { return fmt.Sprintf("%q is not a value", e.Key) }
 
+// ErrInvalidChartName exists due to compatibilty with API users
+//
+//nolint:errname
+type ErrInvalidChartName = InvalidChartNameError
+
 type InvalidChartNameError struct {
 	Name string
 }
diff --git a/pkg/chart/v2/lint/support/message.go b/pkg/chart/v2/lint/support/message.go
index f01d7fc76..7382b03ac 100644
--- a/pkg/chart/v2/lint/support/message.go
+++ b/pkg/chart/v2/lint/support/message.go
@@ -41,6 +41,9 @@ type Linter struct {
 	ChartDir        string
 }
 
+//nolint:errname
+type Message = LintMessageError
+
 // Message describes an error encountered while linting.
 type LintMessageError struct {
 	// Severity is one of the *Sev constants
diff --git a/pkg/downloader/manager.go b/pkg/downloader/manager.go
index f95071855..40caa1579 100644
--- a/pkg/downloader/manager.go
+++ b/pkg/downloader/manager.go
@@ -45,6 +45,8 @@ import (
 	"helm.sh/helm/v4/pkg/repo/v1"
 )
 
+type ErrRepoNotFound = RepoNotFoundError
+
 // RepoNotFoundError indicates that chart repositories can't be found in local repo cache.
 // The value of Repos is missing repos.
 type RepoNotFoundError struct {
diff --git a/pkg/downloader/manager_test.go b/pkg/downloader/manager_test.go
index 85619e196..0e246a284 100644
--- a/pkg/downloader/manager_test.go
+++ b/pkg/downloader/manager_test.go
@@ -550,7 +550,7 @@ func TestBuild_WithRepositoryAlias(t *testing.T) {
 	})
 }
 
-func TestErrRepoNotFound_Error(t *testing.T) {
+func TestRepoNotFound_Error(t *testing.T) {
 	type fields struct {
 		Repos []string
 	}