The main VCL template parsed from variable, not from external file.

pkg/varnish/vcl/template.go

@@ -145,7 +145,6 @@ var fMap = template.FuncMap{
 }
 
 const (
-	ingTmplSrc     = "vcl.tmpl"
 	authTmplSrc    = "auth.tmpl"
 	aclTmplSrc     = "acl.tmpl"
 	rewriteTmplSrc = "rewrite.tmpl"
@@ -158,7 +157,6 @@ const (
 )
 
 var (
-	ingressTmpl *template.Template
 	authTmpl    *template.Template
 	aclTmpl     *template.Template
 	rewriteTmpl *template.Template
@@ -169,17 +167,11 @@ var (
 // InitTemplates initializes templates for VCL generation.
 func InitTemplates(tmplDir string) error {
 	var err error
-	ingTmplPath := path.Join(tmplDir, ingTmplSrc)
 	authTmplPath := path.Join(tmplDir, authTmplSrc)
 	aclTmplPath := path.Join(tmplDir, aclTmplSrc)
 	rewriteTmplPath := path.Join(tmplDir, rewriteTmplSrc)
 	reqDispTmplPath := path.Join(tmplDir, reqDispTmplSrc)
 
-	ingressTmpl, err = template.New(ingTmplSrc).
-		Funcs(fMap).ParseFiles(ingTmplPath)
-	if err != nil {
-		return err
-	}
 	authTmpl, err = template.New(authTmplSrc).
 		Funcs(fMap).ParseFiles(authTmplPath)
 	if err != nil {

pkg/varnish/vcl/vcl.tmpl → pkg/varnish/vcl/vcl_tmpl.go

-vcl 4.1;
+/*
+ * Copyright (c) 2020 UPLEX Nils Goroll Systemoptimierung
+ * All rights reserved
+ *
+ * Author: Geoffrey Simmons <geoffrey.simmons@uplex.de>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+package vcl
+
+import "text/template"
+
+const ingTmplSrc = `vcl 4.1;
 
 import std;
 import directors;
@@ -227,3 +259,9 @@ sub vcl_hit {
 		call vk8s_set_backend;
 	}
 }
+`
+
+const ingTmplName = "vcl"
+
+var ingressTmpl = template.Must(template.New(ingTmplName).
+	Funcs(fMap).Parse(ingTmplSrc))