Use server-side redirects instead of alias files for better experience. (#3799)

(cherry picked from commit 22f520809f)

Makefile

@@ -16,7 +16,7 @@ build:
 	@$(docker) scripts/build_site.sh
 
 gen: build
-	@$(docker) scripts/gen_site.sh "" -minify -no_aliases
+	@$(docker) scripts/gen_site.sh "" -minify
 
 opt:
 	@$(docker) scripts/opt_site.sh

config.toml

@@ -14,6 +14,9 @@ buildFuture = true
 ignoreFiles = [ "OWNERS" ]
 staticDir = ["static", "generated"]
 
+# we use Netlify server-side redirects instead of generated aliases
+disableAliases = true
+
 # MARKDOWN
 ## Configuration for BlackFriday markdown parser: https://github.com/russross/blackfriday
 [blackfriday]
@@ -25,12 +28,21 @@ staticDir = ["static", "generated"]
     extensions = [""]
 
 [outputs]
-  home = ["HTML", "RSS"]
+  home = ["HTML", "RSS", "REDIR"]
   section = ["HTML"]
 
+[mediaTypes]
+    [mediaTypes."text/netlify"]
+        delimiter = ""
+
 [outputFormats]
     [outputFormats.RSS]
         baseName = "feed"
+    [outputFormats.REDIR]
+        mediatype = "text/netlify"
+        baseName = "_redirects"
+        isPlainText = true
+        notAlternative = true
 
 [related]
     # Only include matches with rank >= threshold. This is a normalized rank between 0 and 100.

layouts/index.redir

@@ -21,4 +21,11 @@ https://istio.netlify.com/* https://istio.io/:splat 301!
 /  /zh   302  Language=zh
 
 # Redirect for the helm charts
-/charts/ https://gcsweb.istio.io/gcs/istio-release/releases/1.1.3/charts/ 301
+/charts/ https://gcsweb.istio.io/gcs/istio-release/releases/{{ .Site.Data.args.full_version }}/charts/ 301
+
+# Redirects for all aliases
+{{- range $p := .Site.Pages -}}
+{{- range .Aliases }}
+{{ . | printf "%-35s" }}	{{ $p.RelPermalink }}
+{{- end -}}
+{{- end }}

scripts/gen_site.sh

@@ -3,12 +3,6 @@ set -e
 
 hugo version
 
-if [[ "$3" == "-no_aliases" ]]
-then
-    HUGO_DISABLEALIASES=true
-    export HUGO_DISABLEALIASES
-fi
-
 if [[ "$2" == "-no_minify" ]]
 then
     hugo --baseURL "$1"