From ec2d9d016e473856adb485b90840bcf58bf72cc1 Mon Sep 17 00:00:00 2001
From: "Gerasimos (Makis) Maropoulos" <kataras2006@hotmail.com>
Date: Fri, 17 Mar 2023 12:38:07 +0200
Subject: [PATCH] update view benchmarks and remove ace template parser

---
 HISTORY.md                                    |  10 +-
 README.md                                     |   2 +-
 README_PT_BR.md                               |   2 +-
 README_ZH_HANT.md                             |   2 +-
 _benchmarks/view/README.md                    |  36 +-
 _benchmarks/view/ace/views/layouts/main.ace   |   2 +-
 _benchmarks/view/amber/main.go                |  29 --
 _benchmarks/view/amber/views/index.amber      |   5 -
 .../view/amber/views/layouts/main.amber       |   8 -
 .../view/amber/views/partials/footer.amber    |   2 -
 _benchmarks/view/chart.png                    | Bin 10183 -> 15917 bytes
 _benchmarks/view/tests.yml                    |   2 -
 _examples/README.md                           |   4 -
 _examples/README_ZH_HANT.md                   |   4 -
 .../templates/layouts/layout.html             |   2 +-
 _examples/view/layout/amber/main.go           |  28 --
 _examples/view/layout/amber/views/index.amber |   5 -
 .../layout/amber/views/layouts/main.amber     |   8 -
 .../layout/amber/views/partials/footer.amber  |   2 -
 _examples/view/parse-template/amber/main.go   |  32 --
 _examples/view/template_ace_0/views/index.ace |   2 +
 _examples/view/template_amber_0/main.go       |  23 --
 .../view/template_amber_0/views/index.amber   |  11 -
 .../template_amber_0/views/layouts/main.amber |  15 -
 .../view/template_amber_1_embedded/bindata.go | 358 ------------------
 .../view/template_amber_1_embedded/main.go    |  31 --
 .../views/layouts/application.jet             |   2 +-
 aliases.go                                    |   5 +-
 go.mod                                        |   1 -
 go.sum                                        |   2 -
 view/README.md                                |   7 +-
 view/ace.go                                   |   7 +
 view/amber.go                                 | 281 --------------
 33 files changed, 45 insertions(+), 885 deletions(-)
 delete mode 100644 _benchmarks/view/amber/main.go
 delete mode 100644 _benchmarks/view/amber/views/index.amber
 delete mode 100644 _benchmarks/view/amber/views/layouts/main.amber
 delete mode 100644 _benchmarks/view/amber/views/partials/footer.amber
 delete mode 100644 _examples/view/layout/amber/main.go
 delete mode 100644 _examples/view/layout/amber/views/index.amber
 delete mode 100644 _examples/view/layout/amber/views/layouts/main.amber
 delete mode 100644 _examples/view/layout/amber/views/partials/footer.amber
 delete mode 100644 _examples/view/parse-template/amber/main.go
 delete mode 100644 _examples/view/template_amber_0/main.go
 delete mode 100644 _examples/view/template_amber_0/views/index.amber
 delete mode 100644 _examples/view/template_amber_0/views/layouts/main.amber
 delete mode 100644 _examples/view/template_amber_1_embedded/bindata.go
 delete mode 100644 _examples/view/template_amber_1_embedded/main.go
 delete mode 100644 view/amber.go

diff --git a/HISTORY.md b/HISTORY.md
index f22a8e9c..11405bbd 100644
--- a/HISTORY.md
+++ b/HISTORY.md
@@ -19,6 +19,12 @@ Developers are not forced to upgrade if they don't really need it. Upgrade whene
 
 **How to upgrade**: Open your command-line and execute this command: `go get github.com/kataras/iris/v12@latest` and `go mod tidy -compat=1.20`.
 
+# Next
+
+Change applies to `master` branch.
+
+- Remove [ace](https://github.com/eknkc/amber) template parser support, as it was discontinued by its author more than five years ago.
+
 # Sa, 11 March 2023 | v12.2.0
 
 This release introduces new features and some breaking changes.
@@ -41,7 +47,7 @@ All new features have been tested in production and seem to work fine. Fixed all
 - Add `Context.Render` method for compatibility.
 
 - Support of embedded [locale files](https://github.com/kataras/iris/blob/master/_examples/i18n/template-embedded/main.go) using standard `embed.FS` with the new `LoadFS` function.
-- Support of direct embedded view engines (`HTML, Blocks, Django, Handlebars, Pug, Amber, Jet` and `Ace`) with `embed.FS` or `fs.FS` (in addition to `string` and `http.FileSystem` types).
+- Support of direct embedded view engines (`HTML, Blocks, Django, Handlebars, Pug, Jet` and `Ace`) with `embed.FS` or `fs.FS` (in addition to `string` and `http.FileSystem` types).
 - Add support for `embed.FS` and `fs.FS` on `app.HandleDir`.
 
 - Add `iris.Patches()` package-level function to customize Iris Request Context REST (and more to come) behavior.
@@ -306,7 +312,7 @@ func main() {
 - Fix Response Recorder `Clone` concurrent access afterwards.
 
 - Add a `ParseTemplate` method on view engines to manually parse and add a template from a text as [requested](https://github.com/kataras/iris/issues/1617). [Examples](https://github.com/kataras/iris/tree/master/_examples/view/parse-template).
-- Full `http.FileSystem` interface support for all **view** engines as [requested](https://github.com/kataras/iris/issues/1575). The first argument of the functions(`HTML`, `Blocks`, `Pug`, `Amber`, `Ace`, `Jet`, `Django`, `Handlebars`) can now be either a directory of `string` type (like before) or a value which completes the `http.FileSystem` interface. The `.Binary` method of all view engines was removed: pass the go-bindata's latest version `AssetFile()` exported function as the first argument instead of string.
+- Full `http.FileSystem` interface support for all **view** engines as [requested](https://github.com/kataras/iris/issues/1575). The first argument of the functions(`HTML`, `Blocks`, `Pug`, `Ace`, `Jet`, `Django`, `Handlebars`) can now be either a directory of `string` type (like before) or a value which completes the `http.FileSystem` interface. The `.Binary` method of all view engines was removed: pass the go-bindata's latest version `AssetFile()` exported function as the first argument instead of string.
 
 - Add `Route.ExcludeSitemap() *Route` to exclude a route from sitemap as requested in [chat](https://chat.iris-go.com), also offline routes are excluded automatically now.
 
diff --git a/README.md b/README.md
index 4c4c96f4..dde82ada 100644
--- a/README.md
+++ b/README.md
@@ -187,7 +187,7 @@ Some of the features Iris offers:
 * Builtin support for ngrok to put your app on the internet, the fastest way
 * Unique Router with dynamic path as parameter with standard types like :uuid, :string, :int... and the ability to create your own
 * Compression
-* View Engines (HTML, Django, Amber, Handlebars, Pug/Jade and more)
+* View Engines (HTML, Django, Handlebars, Pug/Jade and more)
 * Create your own File Server and host your own WebDAV server
 * Cache
 * Localization (i18n, sitemap)
diff --git a/README_PT_BR.md b/README_PT_BR.md
index de1d3b40..df94d769 100644
--- a/README_PT_BR.md
+++ b/README_PT_BR.md
@@ -184,7 +184,7 @@ Alguns dos recursos que o Iris Web Framework oferece:
 * Suporte integrado para ngrok para colocar seu aplicativo na internet da maneira mais rápida
 * Router único com caminho dinâmico como parametro com tipos padrões como :uuid, :string, :int... e a habilidade de criar o seu próprio router
 * Compressão
-* View Engines (HTML, Django, Amber, Handlebars, Pug/Jade e mais)
+* View Engines (HTML, Django, Handlebars, Pug/Jade e mais)
 * Cria seu próprio Servidor de Arquivo e hospeda seu próprio servidor WebDAV
 * Cache
 * Localização (i18n, sitemap)
diff --git a/README_ZH_HANT.md b/README_ZH_HANT.md
index 8fcbe8b6..c1e5eea7 100644
--- a/README_ZH_HANT.md
+++ b/README_ZH_HANT.md
@@ -195,7 +195,7 @@ Iris 提供了至少這些功能：
 - 內建 ngrok 支援，讓您可以把 app 以最快速的方式推上網際網路
 - 包含動態路徑、具唯一性的路由，支援如 :uuid、:string、:int 等等的標準類型，並且可以自己建立
 - 壓縮功能
-- 檢視 (View) 算繪引擎 (HTML、Django、Amber、Handlebars、Pug/Jade 等等）
+- 檢視 (View) 算繪引擎 (HTML、Django、Handlebars、Pug/Jade 等等）
 - 建立自己的檔案伺服器，並寄存您自己的 WebDAV 伺服器
 - 快取
 - 本地化 (i18n、sitemap）
diff --git a/_benchmarks/view/README.md b/_benchmarks/view/README.md
index 90fc7cdb..209e4c6a 100644
--- a/_benchmarks/view/README.md
+++ b/_benchmarks/view/README.md
@@ -1,26 +1,27 @@
 # View Engine Benchmarks
 
-Benchmark between all 8 supported template parsers.
+Benchmark between all 7 supported template parsers.
 
-Amber, Ace and Pug parsers minifies the template before render. So, to have a fair benchmark, we must make sure that the byte amount of the total response body is exactly the same across all. Therefore, all other template files are minified too.
+Ace and Pug parsers minifies the template before render. So, to have a fair benchmark, we must make sure that the byte amount of the total response body is exactly the same across all. Therefore, all other template files are minified too.
 
 ![Benchmarks Chart Graph](chart.png)
 
-> Last updated: Oct 1, 2020 at 12:46pm (UTC)
+> Last updated: Mar 17, 2023 at 10:31am (UTC)
 
 ## System
 
 |    |    |
 |----|:---|
-| Processor | Intel(R) Core(TM) i7-8750H CPU @ 2.20GHz |
-| RAM | 15.85 GB |
-| OS | Microsoft Windows 10 Pro |
+| Processor | 12th Gen Intel(R) Core(TM) i7-12700H |
+| RAM | 15.68 GB |
+| OS | Microsoft Windows 11 Pro |
 | [Bombardier](https://github.com/codesenberg/bombardier) | v1.2.4 |
-| [Go](https://golang.org) | go1.15.2 |
+| [Go](https://golang.org) | go1.20.2 |
+| [Node.js](https://nodejs.org/) | v19.5.0 |
 
 ## Terminology
 
-**Name** is the name of the template engine used under a particular test.
+**Name** is the name of the framework(or router) used under a particular test.
 
 **Reqs/sec** is the avg number of total requests could be processed per second (the higher the better).
 
@@ -38,19 +39,18 @@ Amber, Ace and Pug parsers minifies the template before render. So, to have a fa
 
 | Name | Language | Reqs/sec | Latency | Throughput | Time To Complete |
 |------|:---------|:---------|:--------|:-----------|:-----------------|
-| [Amber](./amber) | Go |125698 |0.99ms |44.67MB |7.96s |
-| [Blocks](./blocks) | Go |123974 |1.01ms |43.99MB |8.07s |
-| [Django](./django) | Go |118831 |1.05ms |42.17MB |8.41s |
-| [Handlebars](./handlebars) | Go |101214 |1.23ms |35.91MB |9.88s |
-| [Pug](./pug) | Go |89002 |1.40ms |31.81MB |11.24s |
-| [Ace](./ace) | Go |64782 |1.93ms |22.98MB |15.44s |
-| [HTML](./html) | Go |53918 |2.32ms |19.13MB |18.55s |
-| [Jet](./jet) | Go |4829 |25.88ms |1.71MB |207.07s |
+| [Jet](./jet) | Go |248957 |500.81us |88.26MB |4.02s |
+| [Blocks](./blocks) | Go |238854 |521.76us |84.74MB |4.19s |
+| [Pug](./pug) | Go |238153 |523.74us |85.07MB |4.20s |
+| [Django](./django) | Go |224448 |555.40us |79.61MB |4.46s |
+| [Handlebars](./handlebars) | Go |197267 |631.99us |69.96MB |5.07s |
+| [Ace](./ace) | Go |157415 |792.53us |55.83MB |6.35s |
+| [HTML](./html) | Go |120811 |1.03ms |42.82MB |8.29s |
 
 ## How to Run
 
 ```sh
-$ go install github.com/kataras/server-benchmarks@latest
-$ go install github.com/codesenberg/bombardier@latest
+$ go install github.com/kataras/server-benchmarks@master
+$ go install github.com/codesenberg/bombardier@master
 $ server-benchmarks --wait-run=3s -o ./results
 ```
diff --git a/_benchmarks/view/ace/views/layouts/main.ace b/_benchmarks/view/ace/views/layouts/main.ace
index b1e74baa..9453acad 100644
--- a/_benchmarks/view/ace/views/layouts/main.ace
+++ b/_benchmarks/view/ace/views/layouts/main.ace
@@ -3,6 +3,6 @@ html
   head
     title {{.Title}}
   body
-    {{ yield . . }}
+    {{ yield . }}
     footer
       = include partials/footer.ace .
diff --git a/_benchmarks/view/amber/main.go b/_benchmarks/view/amber/main.go
deleted file mode 100644
index 4b63f684..00000000
--- a/_benchmarks/view/amber/main.go
+++ /dev/null
@@ -1,29 +0,0 @@
-package main
-
-import "github.com/kataras/iris/v12"
-
-func main() {
-	app := iris.New()
-	// By default Amber engine minifies the template before render.
-	app.RegisterView(iris.Amber("./views", ".amber"))
-
-	app.Get("/", index)
-
-	app.Listen(":8080")
-}
-
-func index(ctx iris.Context) {
-	data := iris.Map{
-		"Title":      "Page Title",
-		"FooterText": "Footer contents",
-		"Message":    "Main contents",
-	}
-
-	// On Amber this is ignored:  ctx.ViewLayout("layouts/main")
-	// Layouts are only rendered from inside the index page itself
-	// using the "extends" keyword.
-	if err := ctx.View("index", data); err != nil {
-		ctx.HTML("<h3>%s</h3>", err.Error())
-		return
-	}
-}
diff --git a/_benchmarks/view/amber/views/index.amber b/_benchmarks/view/amber/views/index.amber
deleted file mode 100644
index e92604dc..00000000
--- a/_benchmarks/view/amber/views/index.amber
+++ /dev/null
@@ -1,5 +0,0 @@
-extends layouts/main.amber
-
-block content
-  h1 Index Body
-  h3 Message: #{Message}
\ No newline at end of file
diff --git a/_benchmarks/view/amber/views/layouts/main.amber b/_benchmarks/view/amber/views/layouts/main.amber
deleted file mode 100644
index b0b751a8..00000000
--- a/_benchmarks/view/amber/views/layouts/main.amber
+++ /dev/null
@@ -1,8 +0,0 @@
-doctype html
-html
-  head
-    title #{Title}
-  body
-    block content
-    footer 
-      #{render("partials/footer.amber", $)}
\ No newline at end of file
diff --git a/_benchmarks/view/amber/views/partials/footer.amber b/_benchmarks/view/amber/views/partials/footer.amber
deleted file mode 100644
index a202d2c0..00000000
--- a/_benchmarks/view/amber/views/partials/footer.amber
+++ /dev/null
@@ -1,2 +0,0 @@
-h3 Footer Partial
-h4 #{FooterText}
\ No newline at end of file
diff --git a/_benchmarks/view/chart.png b/_benchmarks/view/chart.png
index 0403fea8dadb1e7190ab5678c1bcfc4d1429f653..6ad909c6025bc04b2c969fdbfcb9f7d63826dc7a 100644
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zv4gi}E7(9Klf~;5W`3%m?iuJ;T#zn^2UT0d!hr7tc<)P26yI=nzd@0bp!Cb;wER^Y
z++o_Jcf^YI@*pidNj&iVRgd@wpb-2MY5fst-(O7ok5K(L-O_FH8@!^82~N>g@2kNJ
QdMu}o8z0L*ivHvO0h0+sRsaA1

diff --git a/_benchmarks/view/tests.yml b/_benchmarks/view/tests.yml
index 00ee224c..a50a03fc 100644
--- a/_benchmarks/view/tests.yml
+++ b/_benchmarks/view/tests.yml
@@ -11,8 +11,6 @@
   Envs:
     - Name: Ace
       Dir: ./ace
-    - Name: Amber
-      Dir: ./amber
     - Name: Blocks
       Dir: ./blocks
     - Name: Django
diff --git a/_examples/README.md b/_examples/README.md
index 7291211e..1b316c66 100644
--- a/_examples/README.md
+++ b/_examples/README.md
@@ -138,7 +138,6 @@
     * [Overview](view/overview/main.go)
     * [Layout](view/layout)
         * [Ace](view/layout/ace)
-        * [Amber](view/layout/amber)
         * [Blocks](view/layout/blocks)
         * [Django](view/layout/django)
         * [Handlebars](view/layout/handlebars)
@@ -160,7 +159,6 @@
     * Parse a Template from Text
         * [HTML, Pug and Ace](view/parse-parse/main.go)
         * [Django](view/parse-parse/django/main.go)
-        * [Amber](view/parse-parse/amber/main.go)
         * [Jet](view/parse-parse/jet/main.go)
         * [Handlebars](view/parse-parse/handlebars/main.go)
     * [Blocks](view/template_blocks_0)
@@ -170,8 +168,6 @@
     * [Pug Embedded`](view/template_pug_2_embedded)
     * [Ace](view/template_ace_0)
     * [Django](view/template_django_0)
-    * [Amber](view/template_amber_0)
-    * [Amber Embedded](view/template_amber_1_embedded)
     * [Jet](view/template_jet_0)
     * [Jet Embedded](view/template_jet_1_embedded)
     * [Jet 'urlpath' tmpl func](view/template_jet_2)
diff --git a/_examples/README_ZH_HANT.md b/_examples/README_ZH_HANT.md
index 5d8abbaa..13c852b1 100644
--- a/_examples/README_ZH_HANT.md
+++ b/_examples/README_ZH_HANT.md
@@ -136,7 +136,6 @@
   - [概覽](view/overview/main.go)
   - [排版引擎](view/layout)
     - [Ace](view/layout/ace)
-    - [Amber](view/layout/amber)
     - [Blocks](view/layout/blocks)
     - [Django](view/layout/django)
     - [Handlebars](view/layout/handlebars)
@@ -158,7 +157,6 @@
   - 從文字解析樣板
     - [HTML, Pug and Ace](view/parse-parse/main.go)
     - [Django](view/parse-parse/django/main.go)
-    - [Amber](view/parse-parse/amber/main.go)
     - [Jet](view/parse-parse/jet/main.go)
     - [Handlebars](view/parse-parse/handlebars/main.go)
   - [Blocks](view/template_blocks_0)
@@ -168,8 +166,6 @@
   - [Pug Embedded`](view/template_pug_2_embedded)
   - [Ace](view/template_ace_0)
   - [Django](view/template_django_0)
-  - [Amber](view/template_amber_0)
-  - [Amber Embedded](view/template_amber_1_embedded)
   - [Jet](view/template_jet_0)
   - [Jet Embedded](view/template_jet_1_embedded)
   - [Jet 'urlpath' tmpl func](view/template_jet_2)
diff --git a/_examples/view/context-view-data/templates/layouts/layout.html b/_examples/view/context-view-data/templates/layouts/layout.html
index 4e0179c7..ef74f39c 100644
--- a/_examples/view/context-view-data/templates/layouts/layout.html
+++ b/_examples/view/context-view-data/templates/layouts/layout.html
@@ -5,6 +5,6 @@
 </head>
 <body>
 	<!-- Render the current template here -->
-	{{ yield . . }}
+	{{ yield . }}
 </body>
 </html>
diff --git a/_examples/view/layout/amber/main.go b/_examples/view/layout/amber/main.go
deleted file mode 100644
index 92195ee3..00000000
--- a/_examples/view/layout/amber/main.go
+++ /dev/null
@@ -1,28 +0,0 @@
-package main
-
-import "github.com/kataras/iris/v12"
-
-func main() {
-	app := iris.New()
-	app.RegisterView(iris.Amber("./views", ".amber"))
-
-	app.Get("/", index)
-
-	app.Listen(":8080")
-}
-
-func index(ctx iris.Context) {
-	data := iris.Map{
-		"Title":      "Page Title",
-		"FooterText": "Footer contents",
-		"Message":    "Main contents",
-	}
-
-	// On Amber this is ignored:  ctx.ViewLayout("layouts/main")
-	// Layouts are only rendered from inside the index page itself
-	// using the "extends" keyword.
-	if err := ctx.View("index", data); err != nil {
-		ctx.HTML("<h3>%s</h3>", err.Error())
-		return
-	}
-}
diff --git a/_examples/view/layout/amber/views/index.amber b/_examples/view/layout/amber/views/index.amber
deleted file mode 100644
index e92604dc..00000000
--- a/_examples/view/layout/amber/views/index.amber
+++ /dev/null
@@ -1,5 +0,0 @@
-extends layouts/main.amber
-
-block content
-  h1 Index Body
-  h3 Message: #{Message}
\ No newline at end of file
diff --git a/_examples/view/layout/amber/views/layouts/main.amber b/_examples/view/layout/amber/views/layouts/main.amber
deleted file mode 100644
index 2dbc577a..00000000
--- a/_examples/view/layout/amber/views/layouts/main.amber
+++ /dev/null
@@ -1,8 +0,0 @@
-doctype html
-html
-  head
-    title #{Title}
-  body
-    block content
-    footer
-      #{render("partials/footer.amber", $)}
\ No newline at end of file
diff --git a/_examples/view/layout/amber/views/partials/footer.amber b/_examples/view/layout/amber/views/partials/footer.amber
deleted file mode 100644
index a202d2c0..00000000
--- a/_examples/view/layout/amber/views/partials/footer.amber
+++ /dev/null
@@ -1,2 +0,0 @@
-h3 Footer Partial
-h4 #{FooterText}
\ No newline at end of file
diff --git a/_examples/view/parse-template/amber/main.go b/_examples/view/parse-template/amber/main.go
deleted file mode 100644
index 3fa5829d..00000000
--- a/_examples/view/parse-template/amber/main.go
+++ /dev/null
@@ -1,32 +0,0 @@
-package main
-
-import "github.com/kataras/iris/v12"
-
-func main() {
-	e := iris.Amber(nil, ".amber") // You can still use a file system though.
-	e.AddFunc("greet", func(name string) string {
-		return "Hello, " + name + "!"
-	})
-	err := e.ParseTemplate("program.amber", []byte(`h1 #{ greet(Name) }`))
-	if err != nil {
-		panic(err)
-	}
-	e.Reload(true)
-
-	app := iris.New()
-	app.RegisterView(e)
-	app.Get("/", index)
-
-	app.Listen(":8080")
-}
-
-func index(ctx iris.Context) {
-	if err := ctx.View("program.amber", iris.Map{
-		"Name": "Gerasimos",
-		// Or per template:
-		// "greet": func(....)
-	}); err != nil {
-		ctx.HTML("<h3>%s</h3>", err.Error())
-		return
-	}
-}
diff --git a/_examples/view/template_ace_0/views/index.ace b/_examples/view/template_ace_0/views/index.ace
index 776cc11f..144910f0 100644
--- a/_examples/view/template_ace_0/views/index.ace
+++ b/_examples/view/template_ace_0/views/index.ace
@@ -2,4 +2,6 @@
 
 h2 {{.Title}}
 
+h3 Body
+
 = include partials/footer.ace .
\ No newline at end of file
diff --git a/_examples/view/template_amber_0/main.go b/_examples/view/template_amber_0/main.go
deleted file mode 100644
index 4d6155c0..00000000
--- a/_examples/view/template_amber_0/main.go
+++ /dev/null
@@ -1,23 +0,0 @@
-package main
-
-import "github.com/kataras/iris/v12"
-
-func main() {
-	app := iris.New()
-
-	// Read about its markup syntax at: https://github.com/eknkc/amber
-	tmpl := iris.Amber("./views", ".amber")
-
-	app.RegisterView(tmpl)
-
-	app.Get("/", func(ctx iris.Context) {
-		if err := ctx.View("index.amber", iris.Map{
-			"Title": "Title of The Page",
-		}); err != nil {
-			ctx.HTML("<h3>%s</h3>", err.Error())
-			return
-		}
-	})
-
-	app.Listen(":8080")
-}
diff --git a/_examples/view/template_amber_0/views/index.amber b/_examples/view/template_amber_0/views/index.amber
deleted file mode 100644
index ab89a92a..00000000
--- a/_examples/view/template_amber_0/views/index.amber
+++ /dev/null
@@ -1,11 +0,0 @@
-extends layouts/main.amber
-
-block append meta
-    meta[name="keywords"][content="These are added by the child template"]
-
-block menu
-    li Item 1
-    li Item 2
-
-block content
-    p Content from child template
\ No newline at end of file
diff --git a/_examples/view/template_amber_0/views/layouts/main.amber b/_examples/view/template_amber_0/views/layouts/main.amber
deleted file mode 100644
index b2f9ad6c..00000000
--- a/_examples/view/template_amber_0/views/layouts/main.amber
+++ /dev/null
@@ -1,15 +0,0 @@
-!!! transitional
-html
-    head
-        title #{Title}
-
-        block meta
-            meta[name="description"][value="This is a sample"]
-
-    body
-        header#mainHeader
-            ul
-                block menu
-
-        div#content
-            block content
\ No newline at end of file
diff --git a/_examples/view/template_amber_1_embedded/bindata.go b/_examples/view/template_amber_1_embedded/bindata.go
deleted file mode 100644
index d92c4889..00000000
--- a/_examples/view/template_amber_1_embedded/bindata.go
+++ /dev/null
@@ -1,358 +0,0 @@
-// Code generated by go-bindata. (@generated) DO NOT EDIT.
-
-// Package main generated by go-bindata.// sources:
-// ../template_amber_0/views/index.amber
-// ../template_amber_0/views/layouts/main.amber
-package main
-
-import (
-	"bytes"
-	"compress/gzip"
-	"fmt"
-	"io"
-	"net/http"
-	"os"
-	"path/filepath"
-	"strings"
-	"time"
-)
-
-func bindataRead(data []byte, name string) ([]byte, error) {
-	gz, err := gzip.NewReader(bytes.NewBuffer(data))
-	if err != nil {
-		return nil, fmt.Errorf("read %q: %v", name, err)
-	}
-
-	var buf bytes.Buffer
-	_, err = io.Copy(&buf, gz)
-	clErr := gz.Close()
-
-	if err != nil {
-		return nil, fmt.Errorf("read %q: %v", name, err)
-	}
-	if clErr != nil {
-		return nil, err
-	}
-
-	return buf.Bytes(), nil
-}
-
-type asset struct {
-	bytes []byte
-	info  os.FileInfo
-}
-
-type bindataFileInfo struct {
-	name    string
-	size    int64
-	mode    os.FileMode
-	modTime time.Time
-}
-
-// Name return file name
-func (fi bindataFileInfo) Name() string {
-	return fi.name
-}
-
-// Size return file size
-func (fi bindataFileInfo) Size() int64 {
-	return fi.size
-}
-
-// Mode return file mode
-func (fi bindataFileInfo) Mode() os.FileMode {
-	return fi.mode
-}
-
-// ModTime return file modify time
-func (fi bindataFileInfo) ModTime() time.Time {
-	return fi.modTime
-}
-
-// IsDir return file whether a directory
-func (fi bindataFileInfo) IsDir() bool {
-	return fi.mode&os.ModeDir != 0
-}
-
-// Sys return file is sys mode
-func (fi bindataFileInfo) Sys() interface{} {
-	return nil
-}
-
-type assetFile struct {
-	*bytes.Reader
-	name            string
-	childInfos      []os.FileInfo
-	childInfoOffset int
-}
-
-type assetOperator struct{}
-
-// Open implement http.FileSystem interface
-func (f *assetOperator) Open(name string) (http.File, error) {
-	var err error
-	if len(name) > 0 && name[0] == '/' {
-		name = name[1:]
-	}
-	content, err := Asset(name)
-	if err == nil {
-		return &assetFile{name: name, Reader: bytes.NewReader(content)}, nil
-	}
-	children, err := AssetDir(name)
-	if err == nil {
-		childInfos := make([]os.FileInfo, 0, len(children))
-		for _, child := range children {
-			childPath := filepath.Join(name, child)
-			info, errInfo := AssetInfo(filepath.Join(name, child))
-			if errInfo == nil {
-				childInfos = append(childInfos, info)
-			} else {
-				childInfos = append(childInfos, newDirFileInfo(childPath))
-			}
-		}
-		return &assetFile{name: name, childInfos: childInfos}, nil
-	} else {
-		// If the error is not found, return an error that will
-		// result in a 404 error. Otherwise the server returns
-		// a 500 error for files not found.
-		if strings.Contains(err.Error(), "not found") {
-			return nil, os.ErrNotExist
-		}
-		return nil, err
-	}
-}
-
-// Close no need do anything
-func (f *assetFile) Close() error {
-	return nil
-}
-
-// Readdir read dir's children file info
-func (f *assetFile) Readdir(count int) ([]os.FileInfo, error) {
-	if len(f.childInfos) == 0 {
-		return nil, os.ErrNotExist
-	}
-	if count <= 0 {
-		return f.childInfos, nil
-	}
-	if f.childInfoOffset+count > len(f.childInfos) {
-		count = len(f.childInfos) - f.childInfoOffset
-	}
-	offset := f.childInfoOffset
-	f.childInfoOffset += count
-	return f.childInfos[offset : offset+count], nil
-}
-
-// Stat read file info from asset item
-func (f *assetFile) Stat() (os.FileInfo, error) {
-	if len(f.childInfos) != 0 {
-		return newDirFileInfo(f.name), nil
-	}
-	return AssetInfo(f.name)
-}
-
-// newDirFileInfo return default dir file info
-func newDirFileInfo(name string) os.FileInfo {
-	return &bindataFileInfo{
-		name:    name,
-		size:    0,
-		mode:    os.FileMode(2147484068), // equal os.FileMode(0644)|os.ModeDir
-		modTime: time.Time{}}
-}
-
-// AssetFile return a http.FileSystem instance that data backend by asset
-func AssetFile() http.FileSystem {
-	return &assetOperator{}
-}
-
-var _indexAmber = []byte("\x1f\x8b\x08\x00\x00\x00\x00\x00\x00\xff\x5c\x8d\x31\x8a\xc3\x30\x14\x44\x7b\x83\xef\x30\xe8\x00\xbb\xec\xf6\xae\xb6\xda\x3e\x9d\x71\xf1\x6d\x4d\xb0\xb1\xbe\x24\xa4\x6f\x12\xdf\x3e\x10\x07\x4c\xd2\xcd\x63\x86\x79\xbc\x1b\xa3\xaf\x08\xb2\xa7\xcd\xea\xb7\xca\x12\xbf\x44\x47\x96\xb6\x69\x9b\x31\xa4\x69\x85\xe4\xcc\xe8\xa1\x34\x69\x1b\x00\xcf\xd4\x47\x51\x76\x6e\xe5\x7e\x4b\xc5\x57\x37\xf4\x53\x8a\xc6\x68\x9d\xbb\xcc\xac\x84\x14\x42\xbc\xa7\xc7\xb8\xc3\x66\x62\x9a\x97\xe0\x61\xd4\x1c\xc4\xe8\x86\x53\xa0\x8c\xdb\xf1\x1c\x16\xfc\x1b\x15\x3f\xef\xf8\x7b\x6e\x5f\x96\xa3\xcf\xf8\x3b\x10\xd7\x92\xf4\xc3\xf0\x08\x00\x00\xff\xff\xaa\xd2\x87\xd5\xdb\x00\x00\x00")
-
-func indexAmberBytes() ([]byte, error) {
-	return bindataRead(
-		_indexAmber,
-		"index.amber",
-	)
-}
-
-func indexAmber() (*asset, error) {
-	bytes, err := indexAmberBytes()
-	if err != nil {
-		return nil, err
-	}
-
-	info := bindataFileInfo{name: "index.amber", size: 219, mode: os.FileMode(438), modTime: time.Unix(1599264617, 0)}
-	a := &asset{bytes: bytes, info: info}
-	return a, nil
-}
-
-var _layoutsMainAmber = []byte("\x1f\x8b\x08\x00\x00\x00\x00\x00\x00\xff\x54\x4e\xc1\xae\x83\x30\x0c\xbb\x23\xf1\x0f\xa1\x7c\x07\xf7\xf7\x01\xdc\x10\x87\x40\x23\x11\xbd\x34\x45\x34\x20\x4d\xd3\xfe\x7d\xea\xd8\x04\xf5\xa5\xae\xdd\xda\x6e\x9a\x06\x6c\x43\x4d\x6c\x1c\x15\xa5\xae\x16\x0b\x52\x57\x00\x00\x0b\xa1\x3f\x59\x86\xb1\x09\x41\xfb\xec\xf3\xf9\xaa\xab\xcb\x99\x24\xce\xff\x10\xc8\xf0\xd2\x32\xb2\x32\x28\x06\xea\x9c\xa7\x34\x6f\xbc\xe6\x0e\x37\x0e\x07\xca\x4e\x9d\xeb\x17\x4e\xc0\x09\x10\x12\x86\x55\xc8\x8d\xbf\xd4\x29\xfa\xc7\x95\x95\x77\xd0\xd6\x06\x64\xfd\xfb\xd0\xb2\x66\x97\xf2\x7e\x9f\xa4\xfb\x7d\xa8\xe7\xa3\x9d\xa3\x1a\xa9\x95\x5f\xce\xe7\x5f\xeb\x1d\x00\x00\xff\xff\x56\x99\x59\x53\x13\x01\x00\x00")
-
-func layoutsMainAmberBytes() ([]byte, error) {
-	return bindataRead(
-		_layoutsMainAmber,
-		"layouts/main.amber",
-	)
-}
-
-func layoutsMainAmber() (*asset, error) {
-	bytes, err := layoutsMainAmberBytes()
-	if err != nil {
-		return nil, err
-	}
-
-	info := bindataFileInfo{name: "layouts/main.amber", size: 275, mode: os.FileMode(438), modTime: time.Unix(1599263735, 0)}
-	a := &asset{bytes: bytes, info: info}
-	return a, nil
-}
-
-// Asset loads and returns the asset for the given name.
-// It returns an error if the asset could not be found or
-// could not be loaded.
-func Asset(name string) ([]byte, error) {
-	canonicalName := strings.Replace(name, "\\", "/", -1)
-	if f, ok := _bindata[canonicalName]; ok {
-		a, err := f()
-		if err != nil {
-			return nil, fmt.Errorf("Asset %s can't read by error: %v", name, err)
-		}
-		return a.bytes, nil
-	}
-	return nil, fmt.Errorf("Asset %s not found", name)
-}
-
-// MustAsset is like Asset but panics when Asset would return an error.
-// It simplifies safe initialization of global variables.
-func MustAsset(name string) []byte {
-	a, err := Asset(name)
-	if err != nil {
-		panic("asset: Asset(" + name + "): " + err.Error())
-	}
-
-	return a
-}
-
-// AssetInfo loads and returns the asset info for the given name.
-// It returns an error if the asset could not be found or
-// could not be loaded.
-func AssetInfo(name string) (os.FileInfo, error) {
-	canonicalName := strings.Replace(name, "\\", "/", -1)
-	if f, ok := _bindata[canonicalName]; ok {
-		a, err := f()
-		if err != nil {
-			return nil, fmt.Errorf("AssetInfo %s can't read by error: %v", name, err)
-		}
-		return a.info, nil
-	}
-	return nil, fmt.Errorf("AssetInfo %s not found", name)
-}
-
-// AssetNames returns the names of the assets.
-func AssetNames() []string {
-	names := make([]string, 0, len(_bindata))
-	for name := range _bindata {
-		names = append(names, name)
-	}
-	return names
-}
-
-// _bindata is a table, holding each asset generator, mapped to its name.
-var _bindata = map[string]func() (*asset, error){
-	"index.amber":        indexAmber,
-	"layouts/main.amber": layoutsMainAmber,
-}
-
-// AssetDir returns the file names below a certain
-// directory embedded in the file by go-bindata.
-// For example if you run go-bindata on data/... and data contains the
-// following hierarchy:
-//
-//	data/
-//	  foo.txt
-//	  img/
-//	    a.png
-//	    b.png
-//
-// then AssetDir("data") would return []string{"foo.txt", "img"}
-// AssetDir("data/img") would return []string{"a.png", "b.png"}
-// AssetDir("foo.txt") and AssetDir("nonexistent") would return an error
-// AssetDir("") will return []string{"data"}.
-func AssetDir(name string) ([]string, error) {
-	node := _bintree
-	if len(name) != 0 {
-		canonicalName := strings.Replace(name, "\\", "/", -1)
-		pathList := strings.Split(canonicalName, "/")
-		for _, p := range pathList {
-			node = node.Children[p]
-			if node == nil {
-				return nil, fmt.Errorf("Asset %s not found", name)
-			}
-		}
-	}
-	if node.Func != nil {
-		return nil, fmt.Errorf("Asset %s not found", name)
-	}
-	rv := make([]string, 0, len(node.Children))
-	for childName := range node.Children {
-		rv = append(rv, childName)
-	}
-	return rv, nil
-}
-
-type bintree struct {
-	Func     func() (*asset, error)
-	Children map[string]*bintree
-}
-
-var _bintree = &bintree{nil, map[string]*bintree{
-	"index.amber": {indexAmber, map[string]*bintree{}},
-	"layouts": {nil, map[string]*bintree{
-		"main.amber": {layoutsMainAmber, map[string]*bintree{}},
-	}},
-}}
-
-// RestoreAsset restores an asset under the given directory
-func RestoreAsset(dir, name string) error {
-	data, err := Asset(name)
-	if err != nil {
-		return err
-	}
-	info, err := AssetInfo(name)
-	if err != nil {
-		return err
-	}
-	err = os.MkdirAll(_filePath(dir, filepath.Dir(name)), os.FileMode(0755))
-	if err != nil {
-		return err
-	}
-	err = os.WriteFile(_filePath(dir, name), data, info.Mode())
-	if err != nil {
-		return err
-	}
-	err = os.Chtimes(_filePath(dir, name), info.ModTime(), info.ModTime())
-	if err != nil {
-		return err
-	}
-	return nil
-}
-
-// RestoreAssets restores an asset under the given directory recursively
-func RestoreAssets(dir, name string) error {
-	children, err := AssetDir(name)
-	// File
-	if err != nil {
-		return RestoreAsset(dir, name)
-	}
-	// Dir
-	for _, child := range children {
-		err = RestoreAssets(dir, filepath.Join(name, child))
-		if err != nil {
-			return err
-		}
-	}
-	return nil
-}
-
-func _filePath(dir, name string) string {
-	canonicalName := strings.Replace(name, "\\", "/", -1)
-	return filepath.Join(append([]string{dir}, strings.Split(canonicalName, "/")...)...)
-}
diff --git a/_examples/view/template_amber_1_embedded/main.go b/_examples/view/template_amber_1_embedded/main.go
deleted file mode 100644
index 36b85315..00000000
--- a/_examples/view/template_amber_1_embedded/main.go
+++ /dev/null
@@ -1,31 +0,0 @@
-package main
-
-import "github.com/kataras/iris/v12"
-
-// $ go install github.com/go-bindata/go-bindata/v3/go-bindata@latest
-//
-// $ go-bindata -fs -prefix "../template_amber_0/views" ../template_amber_0/views/...
-// $ go run .
-// # OR: go-bindata -fs -prefix "views" ./views/... if the views dir is rel to the executable.
-//
-// System files are not used, you can optionally delete the folder and run the example now.
-
-func main() {
-	app := iris.New()
-
-	// Read about its markup syntax at: https://github.com/eknkc/amber
-	tmpl := iris.Amber(AssetFile(), ".amber")
-
-	app.RegisterView(tmpl)
-
-	app.Get("/", func(ctx iris.Context) {
-		if err := ctx.View("index.amber", iris.Map{
-			"Title": "Title of The Page",
-		}); err != nil {
-			ctx.HTML("<h3>%s</h3>", err.Error())
-			return
-		}
-	})
-
-	app.Listen(":8080")
-}
diff --git a/_examples/view/template_jet_0/views/layouts/application.jet b/_examples/view/template_jet_0/views/layouts/application.jet
index 9fce2365..d8945a34 100644
--- a/_examples/view/template_jet_0/views/layouts/application.jet
+++ b/_examples/view/template_jet_0/views/layouts/application.jet
@@ -2,7 +2,7 @@
 <html lang="en">
   <head>
     <meta charset="UTF-8">
-    <title>{{ isset(title) ? title : "" }}</title>
+    <title>{{ isset(title) ? title : "Default" }}</title>
   </head>
   <body>
     {{block documentBody()}}{{end}}
diff --git a/aliases.go b/aliases.go
index 47d04e5c..f83fad7d 100644
--- a/aliases.go
+++ b/aliases.go
@@ -46,7 +46,7 @@ type (
 	// Developers get request information from the client's request by a Context.
 	Context = *context.Context
 	// ViewEngine is an alias of `context.ViewEngine`.
-	// See HTML, Blocks, Django, Jet, Pug, Ace, Handlebars, Amber and e.t.c.
+	// See HTML, Blocks, Django, Jet, Pug, Ace, Handlebars and e.t.c.
 	ViewEngine = context.ViewEngine
 	// UnmarshalerFunc a shortcut, an alias for the `context#UnmarshalerFunc` type
 	// which implements the `context#Unmarshaler` interface for reading request's body
@@ -267,9 +267,6 @@ var (
 	// Pug view engine.
 	// Shortcut of the view.Pug.
 	Pug = view.Pug
-	// Amber view engine.
-	// Shortcut of the view.Amber.
-	Amber = view.Amber
 	// Jet view engine.
 	// Shortcut of the view.Jet.
 	Jet = view.Jet
diff --git a/go.mod b/go.mod
index 9b11fb85..b279310a 100644
--- a/go.mod
+++ b/go.mod
@@ -12,7 +12,6 @@ require (
 	github.com/andybalholm/brotli v1.0.5
 	github.com/blang/semver/v4 v4.0.0
 	github.com/dgraph-io/badger/v2 v2.2007.4
-	github.com/eknkc/amber v0.0.0-20171010120322-cdade1c07385
 	github.com/fatih/structs v1.1.0
 	github.com/flosch/pongo2/v4 v4.0.2
 	github.com/golang/snappy v0.0.4
diff --git a/go.sum b/go.sum
index aea4d4a7..a4e63bb6 100644
--- a/go.sum
+++ b/go.sum
@@ -49,8 +49,6 @@ github.com/djherbis/atime v1.1.0/go.mod h1:28OF6Y8s3NQWwacXc5eZTsEsiMzp7LF8MbXE+
 github.com/dustin/go-humanize v1.0.0/go.mod h1:HtrtbFcZ19U5GC7JDqmcUSB87Iq5E25KnS6fMYU6eOk=
 github.com/dustin/go-humanize v1.0.1 h1:GzkhY7T5VNhEkwH0PVJgjz+fX1rhBrR7pRT3mDkpeCY=
 github.com/dustin/go-humanize v1.0.1/go.mod h1:Mu1zIs6XwVuF/gI1OepvI0qD18qycQx+mFykh5fBlto=
-github.com/eknkc/amber v0.0.0-20171010120322-cdade1c07385 h1:clC1lXBpe2kTj2VHdaIu9ajZQe4kcEY9j0NsnDDBZ3o=
-github.com/eknkc/amber v0.0.0-20171010120322-cdade1c07385/go.mod h1:0vRUJqYpeSZifjYj7uP3BG/gKcuzL9xWVV/Y+cK33KM=
 github.com/fatih/structs v1.1.0 h1:Q7juDM0QtcnhCpeyLGQKyg4TOIghuNXrkL32pHAUMxo=
 github.com/fatih/structs v1.1.0/go.mod h1:9NiDSp5zOcgEDl+j00MP/WkGVPOlPRLejGD8Ga6PJ7M=
 github.com/flosch/pongo2/v4 v4.0.2 h1:gv+5Pe3vaSVmiJvh/BZa82b7/00YUGm0PIyVVLop0Hw=
diff --git a/view/README.md b/view/README.md
index a5232966..84914048 100644
--- a/view/README.md
+++ b/view/README.md
@@ -1,6 +1,6 @@
 # View
 
-Iris supports 8 template engines out-of-the-box, developers can still use any external golang template engine,
+Iris supports 7 template engines out-of-the-box, developers can still use any external golang template engine,
 as `Context.ResponseWriter()` is an `io.Writer`.
 
 All template engines share a common API i.e.
@@ -13,9 +13,8 @@ Parse using embedded assets, Layouts and Party-specific layout, Template Funcs,
 | 3 | Django     | [flosch/pongo2](https://github.com/flosch/pongo2) |
 | 4 | Pug        | [Joker/jade](https://github.com/Joker/jade) |
 | 5 | Handlebars | [mailgun/raymond](https://github.com/mailgun/raymond) |
-| 6 | Amber      | [eknkc/amber](https://github.com/eknkc/amber) |
-| 7 | Jet        | [CloudyKit/jet](https://github.com/CloudyKit/jet) |
-| 8 | Ace        | [yosssi/ace](https://github.com/yosssi/ace) |
+| 6 | Jet        | [CloudyKit/jet](https://github.com/CloudyKit/jet) |
+| 7 | Ace        | [yosssi/ace](https://github.com/yosssi/ace) |
 
 [List of Examples](https://github.com/kataras/iris/tree/master/_examples/view).
 
diff --git a/view/ace.go b/view/ace.go
index 04fe746f..5da5e263 100644
--- a/view/ace.go
+++ b/view/ace.go
@@ -1,6 +1,7 @@
 package view
 
 import (
+	"strings"
 	"sync"
 
 	"github.com/yosssi/ace"
@@ -62,6 +63,12 @@ func Ace(fs interface{}, extension string) *AceEngine {
 			[]*ace.File{},
 		)
 
+		if strings.Contains(name, "layout") {
+			for k, v := range s.layoutFuncs {
+				funcs[k] = v
+			}
+		}
+
 		opts := &ace.Options{
 			Extension:  extension[1:],
 			FuncMap:    funcs,
diff --git a/view/amber.go b/view/amber.go
deleted file mode 100644
index 72c6d90b..00000000
--- a/view/amber.go
+++ /dev/null
@@ -1,281 +0,0 @@
-package view
-
-import (
-	"bytes"
-	"fmt"
-	"html/template"
-	"io"
-	"io/fs"
-	"net/http"
-	"os"
-	"path/filepath"
-	"strings"
-	"sync"
-	"sync/atomic"
-
-	"github.com/kataras/iris/v12/context"
-
-	"github.com/eknkc/amber"
-)
-
-// AmberEngine contains the amber view engine structure.
-type AmberEngine struct {
-	fs fs.FS
-	// files configuration
-	rootDir   string
-	extension string
-	reload    bool
-	//
-	rmu           sync.RWMutex // locks for `ExecuteWiter` when `reload` is true.
-	templateCache map[string]*template.Template
-	bufPool       *sync.Pool
-
-	Options amber.Options
-}
-
-var (
-	_ Engine       = (*AmberEngine)(nil)
-	_ EngineFuncer = (*AmberEngine)(nil)
-)
-
-var amberOnce = new(uint32)
-
-// Amber creates and returns a new amber view engine.
-// The given "extension" MUST begin with a dot.
-//
-// Usage:
-// Amber("./views", ".amber") or
-// Amber(iris.Dir("./views"), ".amber") or
-// Amber(embed.FS, ".amber") or Amber(AssetFile(), ".amber") for embedded data.
-func Amber(dirOrFS interface{}, extension string) *AmberEngine {
-	if atomic.LoadUint32(amberOnce) > 0 {
-		panic("Amber: cannot be registered twice as its internal implementation share the same template functions across instances.")
-	} else {
-		atomic.StoreUint32(amberOnce, 1)
-	}
-
-	fileSystem := getFS(dirOrFS)
-	s := &AmberEngine{
-		fs:            fileSystem,
-		rootDir:       "/",
-		extension:     extension,
-		templateCache: make(map[string]*template.Template),
-		Options: amber.Options{
-			PrettyPrint:       false,
-			LineNumbers:       false,
-			VirtualFilesystem: http.FS(fileSystem),
-		},
-		bufPool: &sync.Pool{New: func() interface{} {
-			return new(bytes.Buffer)
-		}},
-	}
-
-	builtinFuncs := template.FuncMap{
-		"render": func(name string, binding interface{}) (template.HTML, error) {
-			result, err := s.executeTemplateBuf(name, binding)
-			return template.HTML(result), err
-		},
-	}
-
-	for k, v := range builtinFuncs {
-		amber.FuncMap[k] = v
-	}
-
-	return s
-}
-
-// RootDir sets the directory to be used as a starting point
-// to load templates from the provided file system.
-func (s *AmberEngine) RootDir(root string) *AmberEngine {
-	if s.fs != nil && root != "" && root != "/" && root != "." && root != s.rootDir {
-		sub, err := fs.Sub(s.fs, s.rootDir)
-		if err != nil {
-			panic(err)
-		}
-
-		s.fs = sub // here so the "middleware" can work.
-	}
-
-	s.rootDir = filepath.ToSlash(root)
-	return s
-}
-
-// Name returns the amber engine's name.
-func (s *AmberEngine) Name() string {
-	return "Amber"
-}
-
-// Ext returns the file extension which this view engine is responsible to render.
-// If the filename extension on ExecuteWriter is empty then this is appended.
-func (s *AmberEngine) Ext() string {
-	return s.extension
-}
-
-// Reload if set to true the templates are reloading on each render,
-// use it when you're in development and you're boring of restarting
-// the whole app when you edit a template file.
-//
-// Note that if `true` is passed then only one `View -> ExecuteWriter` will be render each time,
-// no concurrent access across clients, use it only on development status.
-// It's good to be used side by side with the https://github.com/kataras/rizla reloader for go source files.
-func (s *AmberEngine) Reload(developmentMode bool) *AmberEngine {
-	s.reload = developmentMode
-	return s
-}
-
-// SetPrettyPrint if pretty printing is enabled.
-// Pretty printing ensures that the output html is properly indented and in human readable form.
-// Defaults to false, response is minified.
-func (s *AmberEngine) SetPrettyPrint(pretty bool) *AmberEngine {
-	s.Options.PrettyPrint = true
-	return s
-}
-
-// AddFunc adds the function to the template's function map.
-// It is legal to overwrite elements of the default actions:
-// - url func(routeName string, args ...string) string
-// - urlpath func(routeName string, args ...string) string
-// - render func(fullPartialName string) (template.HTML, error).
-//
-// Note that, Amber does not support functions per template,
-// instead it's using the "call" directive so any template-specific
-// functions should be passed using `Context.View/ViewData` binding data.
-// This method will modify the global amber's FuncMap which considers
-// as the "builtin" as this is the only way to actually add a function.
-// Note that, if you use more than one amber engine, the functions are shared.
-func (s *AmberEngine) AddFunc(funcName string, funcBody interface{}) {
-	s.rmu.Lock()
-	amber.FuncMap[funcName] = funcBody
-	s.rmu.Unlock()
-}
-
-// Load parses the templates to the engine.
-// It is responsible to add the necessary global functions.
-//
-// Returns an error if something bad happens, user is responsible to catch it.
-func (s *AmberEngine) Load() error {
-	// If only custom templates should be loaded.
-	if (s.fs == nil || context.IsNoOpFS(s.fs)) && len(s.templateCache) > 0 {
-		return nil
-	}
-
-	rootDirName := getRootDirName(s.fs)
-
-	return walk(s.fs, "", func(path string, info os.FileInfo, err error) error {
-		if err != nil {
-			return err
-		}
-
-		if info == nil || info.IsDir() {
-			return nil
-		}
-
-		if s.extension != "" {
-			if !strings.HasSuffix(path, s.extension) {
-				return nil
-			}
-		}
-
-		if s.rootDir == rootDirName {
-			path = strings.TrimPrefix(path, rootDirName)
-			path = strings.TrimPrefix(path, "/")
-		}
-
-		contents, err := asset(s.fs, path)
-		if err != nil {
-			return fmt.Errorf("%s: %w", path, err)
-		}
-
-		err = s.ParseTemplate(path, contents)
-		if err != nil {
-			return fmt.Errorf("%s: %v", path, err)
-		}
-		return nil
-	})
-}
-
-// ParseTemplate adds a custom template from text.
-// This template parser does not support funcs per template directly.
-// Two ways to add a function:
-// Globally: Use `AddFunc` or pass them on `View` instead.
-// Per Template: Use `Context.ViewData/View`.
-func (s *AmberEngine) ParseTemplate(name string, contents []byte) error {
-	s.rmu.Lock()
-	defer s.rmu.Unlock()
-
-	comp := amber.New()
-	comp.Options = s.Options
-
-	err := comp.ParseData(contents, name)
-	if err != nil {
-		return err
-	}
-
-	data, err := comp.CompileString()
-	if err != nil {
-		return err
-	}
-
-	name = strings.TrimPrefix(name, "/")
-
-	/*
-		New(...).Funcs(s.builtinFuncs):
-		This won't work on amber, it loads only amber.FuncMap which is global.
-		Relative code:
-		https://github.com/eknkc/amber/blob/cdade1c073850f4ffc70a829e31235ea6892853b/compiler.go#L771-L794
-	*/
-
-	tmpl := template.New(name).Funcs(amber.FuncMap)
-	_, err = tmpl.Parse(data)
-	if err == nil {
-		s.templateCache[name] = tmpl
-	}
-
-	return err
-}
-
-func (s *AmberEngine) executeTemplateBuf(name string, binding interface{}) (string, error) {
-	buf := s.bufPool.Get().(*bytes.Buffer)
-	buf.Reset()
-
-	tmpl := s.fromCache(name)
-	if tmpl == nil {
-		s.bufPool.Put(buf)
-		return "", ErrNotExist{Name: name, IsLayout: false, Data: binding}
-	}
-
-	err := tmpl.ExecuteTemplate(buf, name, binding)
-	result := strings.TrimSuffix(buf.String(), "\n") // on amber it adds a new line.
-	s.bufPool.Put(buf)
-	return result, err
-}
-
-func (s *AmberEngine) fromCache(relativeName string) *template.Template {
-	if s.reload {
-		s.rmu.RLock()
-		defer s.rmu.RUnlock()
-	}
-
-	if tmpl, ok := s.templateCache[relativeName]; ok {
-		return tmpl
-	}
-
-	return nil
-}
-
-// ExecuteWriter executes a template and writes its result to the w writer.
-// layout here is useless.
-func (s *AmberEngine) ExecuteWriter(w io.Writer, filename string, layout string, bindingData interface{}) error {
-	// re-parse the templates if reload is enabled.
-	if s.reload {
-		if err := s.Load(); err != nil {
-			return err
-		}
-	}
-
-	if tmpl := s.fromCache(filename); tmpl != nil {
-		return tmpl.Execute(w, bindingData)
-	}
-
-	return ErrNotExist{Name: filename, IsLayout: false, Data: bindingData}
-}