add theme support

assets/css/blue.css

@@ -0,0 +1,11 @@
+.highlight {
+  color: #4286f4 !important;
+}
+
+.curly {
+  color: #8d00c5 !important;
+}
+
+.square {
+  color: #66ffed !important;
+}

assets/css/purple.css

@@ -0,0 +1,11 @@
+.highlight {
+  color: #9966cc !important;
+}
+
+.curly {
+  color: #993374 !important;
+}
+
+.square {
+  color: #c77b7b !important;
+}

assets/css/red.css

@@ -0,0 +1,11 @@
+.highlight {
+  color: #e83e3e !important;
+}
+
+.curly {
+  color: #ef7373 !important;
+}
+
+.square {
+  color: #ffb0b0 !important;
+}

exampleSite/hugo.yaml

@@ -24,6 +24,8 @@ params:
 
   asciiArt: 2
 
+  theme: default
+
 disableKinds:
   - taxonomy
 ignoreErrors:

layouts/partials/head/css.html

@@ -1,11 +1,22 @@
-{{- with resources.Get "css/main.css" }} {{- if eq hugo.Environment
-"development" }}
+{{- with resources.Get "css/main.css" }}
+  {{- if eq hugo.Environment "development" }}
     <link rel="stylesheet" href="{{ .RelPermalink }}" />
-{{- else }} {{- with . | minify | fingerprint }}
-<link
-  rel="stylesheet"
-  href="{{ .RelPermalink }}"
-  integrity="{{ .Data.Integrity }}"
-  crossorigin="anonymous"
-/>
-{{- end }} {{- end }} {{- end }}
+  {{- else }}
+    {{- with . | minify | fingerprint }}
+      <link rel="stylesheet" href="{{ .RelPermalink }}" integrity="{{ .Data.Integrity }}" crossorigin="anonymous" />
+    {{- end }}
+  {{- end }}
+{{- end }}
+
+{{- $theme := .Site.Params.theme }}
+{{- if and $theme (ne $theme "default") }}
+  {{- with resources.Get (printf "css/%s.css" $theme) }}
+    {{- if eq hugo.Environment "development" }}
+      <link rel="stylesheet" href="{{ .RelPermalink }}" />
+    {{- else }}
+      {{- with . | minify | fingerprint }}
+        <link rel="stylesheet" href="{{ .RelPermalink }}" integrity="{{ .Data.Integrity }}" crossorigin="anonymous" />
+      {{- end }}
+    {{- end }}
+  {{- end }}
+{{- end }}