Rewrite template is an internal variable, not an external file.

pkg/varnish/vcl/rewrite.tmpl → pkg/varnish/vcl/rewrite_tmpl.go

+/*
+ * 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 rewriteTmplSrc = `
 import re2;
 import selector;
 
@@ -52,3 +84,9 @@ sub vcl_{{rewrSub $r}} {
 	{{- end}}
 }
 {{- end}}
+`
+
+const rewriteTmplName = "rewrite"
+
+var rewriteTmpl = template.Must(template.New(rewriteTmplName).Funcs(fMap).
+	Parse(rewriteTmplSrc))

pkg/varnish/vcl/template.go

@@ -145,7 +145,6 @@ var fMap = template.FuncMap{
 }
 
 const (
-	rewriteTmplSrc = "rewrite.tmpl"
 	reqDispTmplSrc = "recv_disposition.tmpl"
 
 	// maxSymLen is a workaround for Varnish issue #2880
@@ -155,7 +154,6 @@ const (
 )
 
 var (
-	rewriteTmpl *template.Template
 	reqDispTmpl *template.Template
 	vclIllegal  = regexp.MustCompile("[^[:word:]-]+")
 )
@@ -163,14 +161,8 @@ var (
 // InitTemplates initializes templates for VCL generation.
 func InitTemplates(tmplDir string) error {
 	var err error
-	rewriteTmplPath := path.Join(tmplDir, rewriteTmplSrc)
 	reqDispTmplPath := path.Join(tmplDir, reqDispTmplSrc)
 
-	rewriteTmpl, err = template.New(rewriteTmplSrc).
-		Funcs(fMap).ParseFiles(rewriteTmplPath)
-	if err != nil {
-		return err
-	}
 	reqDispTmpl, err = template.New(reqDispTmplSrc).
 		Funcs(fMap).ParseFiles(reqDispTmplPath)
 	if err != nil {