shithub: hugo

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Fix Viperized .Site.Params

git bisect identified 62dd1d4 as the breaking commit; when
github.com/spf13/viper was introduced, the Params field was always
empty.

Given a map in YAML in Viper, the return type is
`map[interface{}]interface{}`, _not_ `map[string]interface{}`, even if
`.SetDefault()` has been called with an item of
`map[string]interface{}{}` so the cast assertion on the `.Get("Params")`
always failed.

--- a/hugolib/site.go

+++ b/hugolib/site.go

@@ -260,9 +260,17 @@

 }

 func (s *Site) initializeSiteInfo() {

-	params, ok := viper.Get("Params").(map[string]interface{})

+	paramsV, ok := viper.Get("Params").(map[interface{}]interface{})

+	// Warning: viper.Get(map_item) returns map[interface{}]interface{}

+	// even if .SetDefault called with a map[string]interface{}

 	if !ok {

-		params = make(map[string]interface{})

+		paramsV = make(map[interface{}]interface{})

+	}

+	params := make(map[string]interface{}, len(paramsV))

+	for k, v := range paramsV {

+		if s, ok := k.(string); ok {

+			params[s] = v

+		}

 	}

 	permalinks := make(PermalinkOverrides)