Refactor Org mode front matter: Introduce '#+KEY[]:' array notation

Hugo requires some front matter values to be arrays (e.g. for taxonomies).
Org mode front matter syntax (`#+KEY: VALUE`) does however not support anything
but string values normally - which is why goorgeous hardcoded the values for
the keys tags, categories & aliases to be parsed as string arrays. This causes
problems with custom taxonomies.

A simple thing we can do instead is make keywords ending in '[]' be parsed as
string arrays.

diff --git a/parser/metadecoders/decoder.go b/parser/metadecoders/decoder.go
index af2e19f8f63b40b2eb6c34b9e6f6d82542bc9e39..e7b0e3c97b8feb70f6457c941648b93827867ec1 100644 (file)
--- a/parser/metadecoders/decoder.go
+++ b/parser/metadecoders/decoder.go
@@ -187,7 +187,10 @@ func (d Decoder) unmarshalORG(data []byte, v interface{}) error {
        frontMatter := make(map[string]interface{}, len(document.BufferSettings))
        for k, v := range document.BufferSettings {
                k = strings.ToLower(k)
-               if k == "tags" || k == "categories" || k == "aliases" {
+               if strings.HasSuffix(k, "[]") {
+                       frontMatter[k[:len(k)-2]] = strings.Fields(v)
+               } else if k == "tags" || k == "categories" || k == "aliases" {
+                       jww.WARN.Printf("Please use '#+%s[]:' notation, automatic conversion is deprecated.", k)
                        frontMatter[k] = strings.Fields(v)
                } else {
                        frontMatter[k] = v