[chore]: Bump github.com/spf13/viper from 1.20.0 to 1.20.1

Bumps [github.com/spf13/viper](https://github.com/spf13/viper) from 1.20.0 to 1.20.1.
- [Release notes](https://github.com/spf13/viper/releases)
- [Commits](https://github.com/spf13/viper/compare/v1.20.0...v1.20.1)

---
updated-dependencies:
- dependency-name: github.com/spf13/viper
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

go.mod

@@ -2,7 +2,7 @@ module github.com/superseriousbusiness/gotosocial
 
 go 1.23.0
 
-toolchain go1.23.3
+toolchain go1.24.1
 
 // Replace go-swagger with our version that fixes (ours particularly) use of Go1.23
 replace github.com/go-swagger/go-swagger => codeberg.org/superseriousbusiness/go-swagger v0.31.0-gts-go1.23-fix
@@ -59,7 +59,7 @@ require (
 	github.com/prometheus/client_golang v1.21.1
 	github.com/rivo/uniseg v0.4.7
 	github.com/spf13/cobra v1.9.1
-	github.com/spf13/viper v1.20.0
+	github.com/spf13/viper v1.20.1
 	github.com/stretchr/testify v1.10.0
 	github.com/tdewolff/minify/v2 v2.22.3
 	github.com/technologize/otel-go-contrib v1.1.1

go.sum

@@ -388,8 +388,8 @@ github.com/spf13/cobra v1.9.1 h1:CXSaggrXdbHK9CF+8ywj8Amf7PBRmPCOJugH954Nnlo=
 github.com/spf13/cobra v1.9.1/go.mod h1:nDyEzZ8ogv936Cinf6g1RU9MRY64Ir93oCnqb9wxYW0=
 github.com/spf13/pflag v1.0.6 h1:jFzHGLGAlb3ruxLB8MhbI6A8+AQX/2eW4qeyNZXNp2o=
 github.com/spf13/pflag v1.0.6/go.mod h1:McXfInJRrz4CZXVZOBLb0bTZqETkiAhM9Iw0y3An2Bg=
-github.com/spf13/viper v1.20.0 h1:zrxIyR3RQIOsarIrgL8+sAvALXul9jeEPa06Y0Ph6vY=
-github.com/spf13/viper v1.20.0/go.mod h1:P9Mdzt1zoHIG8m2eZQinpiBjo6kCmZSKBClNNqjJvu4=
+github.com/spf13/viper v1.20.1 h1:ZMi+z/lvLyPSCoNtFCpqjy0S4kPbirhpTMwl8BkW9X4=
+github.com/spf13/viper v1.20.1/go.mod h1:P9Mdzt1zoHIG8m2eZQinpiBjo6kCmZSKBClNNqjJvu4=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/objx v0.4.0/go.mod h1:YvHI0jy2hoMjB+UWwv71VJQ9isScKT/TqJzVSSt89Yw=
 github.com/stretchr/objx v0.5.0/go.mod h1:Yh+to48EsGEfYuaHDzXPcE3xhTkx73EhmCGUpEOglKo=

vendor/github.com/spf13/viper/viper.go

@@ -1535,27 +1535,29 @@ func (v *Viper) MergeInConfig() error {
 func ReadConfig(in io.Reader) error { return v.ReadConfig(in) }
 
 func (v *Viper) ReadConfig(in io.Reader) error {
-	if v.configType == "" {
-		return errors.New("cannot decode configuration: config type is not set")
+	config := make(map[string]any)
+
+	err := v.unmarshalReader(in, config)
+	if err != nil {
+		return err
 	}
 
-	v.config = make(map[string]any)
-	return v.unmarshalReader(in, v.config)
+	v.config = config
+
+	return nil
 }
 
 // MergeConfig merges a new configuration with an existing config.
 func MergeConfig(in io.Reader) error { return v.MergeConfig(in) }
 
 func (v *Viper) MergeConfig(in io.Reader) error {
-	if v.configType == "" {
-		return errors.New("cannot decode configuration: config type is not set")
-	}
+	config := make(map[string]any)
 
-	cfg := make(map[string]any)
-	if err := v.unmarshalReader(in, cfg); err != nil {
+	if err := v.unmarshalReader(in, config); err != nil {
 		return err
 	}
-	return v.MergeConfigMap(cfg)
+
+	return v.MergeConfigMap(config)
 }
 
 // MergeConfigMap merges the configuration from the map given with an existing config.
@@ -1662,15 +1664,21 @@ func (v *Viper) writeConfig(filename string, force bool) error {
 }
 
 func (v *Viper) unmarshalReader(in io.Reader, c map[string]any) error {
+	format := strings.ToLower(v.getConfigType())
+	if format == "" {
+		return errors.New("cannot decode configuration: unable to determine config type")
+	}
+
 	buf := new(bytes.Buffer)
 	buf.ReadFrom(in)
 
-	format := strings.ToLower(v.getConfigType())
-
+	// TODO: remove this once SupportedExts is deprecated/removed
 	if !slices.Contains(SupportedExts, format) {
 		return UnsupportedConfigError(format)
 	}
 
+	// TODO: return [UnsupportedConfigError] if the registry does not contain the format
+	// TODO: consider deprecating this error type
 	decoder, err := v.decoderRegistry.Decoder(format)
 	if err != nil {
 		return ConfigParseError{err}

vendor/modules.txt

@@ -791,7 +791,7 @@ github.com/spf13/cobra
 # github.com/spf13/pflag v1.0.6
 ## explicit; go 1.12
 github.com/spf13/pflag
-# github.com/spf13/viper v1.20.0
+# github.com/spf13/viper v1.20.1
 ## explicit; go 1.21.0
 github.com/spf13/viper
 github.com/spf13/viper/internal/encoding/dotenv