[confmap] use github.com/go-viper/mapstructure/v2

.chloggen/update_mapstructure.yaml

@@ -0,0 +1,26 @@
+# Use this changelog template to create an entry for release notes.
+
+# One of 'breaking', 'deprecation', 'new_component', 'enhancement', 'bug_fix'
+change_type: enhancement
+
+# The name of the component, or a single word describing the area of concern, (e.g. otlpreceiver)
+component: confmap
+
+# A brief description of the change.  Surround your text with quotes ("") if it needs to start with a backtick (`).
+note: Update mapstructure to use a maintained fork, github.com/go-viper/mapstructure/v2.
+
+# One or more tracking issues or pull requests related to the change
+issues: [9634]
+
+# (Optional) One or more lines of additional information to render under the primary note.
+# These lines will be padded with 2 spaces and then inserted directly into the document.
+# Use pipe (|) for multiline entries.
+subtext: |
+  See https://github.com/mitchellh/mapstructure/issues/349 for context.
+
+# Optional: The change log or logs in which this entry should be included.
+# e.g. '[user]' or '[user, api]'
+# Include 'user' if the change is relevant to end users.
+# Include 'api' if there is a change to a library API.
+# Default: '[user]'
+change_logs: []

confmap/confmap.go

@@ -8,10 +8,10 @@ import (
 	"fmt"
 	"reflect"
 
+	"github.com/go-viper/mapstructure/v2"
 	"github.com/knadh/koanf/maps"
 	"github.com/knadh/koanf/providers/confmap"
 	"github.com/knadh/koanf/v2"
-	"github.com/mitchellh/mapstructure"
 
 	encoder "go.opentelemetry.io/collector/confmap/internal/mapstructure"
 )

confmap/internal/mapstructure/encoder.go

@@ -10,7 +10,7 @@ import (
 	"reflect"
 	"strings"
 
-	"github.com/mitchellh/mapstructure"
+	"github.com/go-viper/mapstructure/v2"
 )
 
 const (

confmap/internal/mapstructure/encoder_test.go

@@ -10,7 +10,7 @@ import (
 	"strings"
 	"testing"
 
-	"github.com/mitchellh/mapstructure"
+	"github.com/go-viper/mapstructure/v2"
 	"github.com/stretchr/testify/require"
 )