Support templating of inlcude directives in nginx.conf

Co-authored-by: Timothy Hitchener <thitchener@vmware.com>
Co-authored-by: Andy Brown <browna@vmware.com>

- Varify executable follows include directives to parse included config
files

fixtures/templated_with_include/buildpack.yml

@@ -0,0 +1,5 @@
+---
+nginx:
+  version: stable
+  plaintext_env_vars:
+    - "OVERRIDE"

fixtures/templated_with_include/custom.conf

@@ -0,0 +1,38 @@
+daemon off;
+
+error_log stderr;
+events { worker_connections 1024; }
+
+http {
+  charset utf-8;
+  log_format cloudfoundry 'NginxLog "$request" $status $body_bytes_sent';
+  access_log /dev/stdout cloudfoundry;
+  default_type application/octet-stream;
+  include mime.types;
+  sendfile on;
+
+  tcp_nopush on;
+  keepalive_timeout 30;
+  port_in_redirect off; # Ensure that redirects don't include the internal container PORT - 8080
+
+  server {
+    listen {{port}};
+    resolver {{nameservers}};
+    root public;
+    index index.html index.htm Default.htm;
+
+    # configuration endpoint
+    location /test {
+      default_type application/json;
+
+      set $override {{env "OVERRIDE"}};
+
+      if ($override != '') {
+        return 200 {{env "OVERRIDE"}};
+      }
+
+      return 200 "No overrides happening!";
+    }
+  }
+}
+

fixtures/templated_with_include/mime.types

@@ -0,0 +1,78 @@
+types {
+  text/html html htm shtml;
+  text/css css;
+  text/xml xml;
+  image/gif gif;
+  image/jpeg jpeg jpg;
+  application/x-javascript js;
+  application/atom+xml atom;
+  application/rss+xml rss;
+  font/ttf ttf;
+  font/woff woff;
+  font/woff2 woff2;
+  text/mathml mml;
+  text/plain txt;
+  text/vnd.sun.j2me.app-descriptor jad;
+  text/vnd.wap.wml wml;
+  text/x-component htc;
+  text/cache-manifest manifest;
+  image/png png;
+  image/tiff tif tiff;
+  image/vnd.wap.wbmp wbmp;
+  image/x-icon ico;
+  image/x-jng jng;
+  image/x-ms-bmp bmp;
+  image/svg+xml svg svgz;
+  image/webp webp;
+  application/java-archive jar war ear;
+  application/mac-binhex40 hqx;
+  application/msword doc;
+  application/pdf pdf;
+  application/postscript ps eps ai;
+  application/rtf rtf;
+  application/vnd.ms-excel xls;
+  application/vnd.ms-powerpoint ppt;
+  application/vnd.wap.wmlc wmlc;
+  application/vnd.google-earth.kml+xml  kml;
+  application/vnd.google-earth.kmz kmz;
+  application/x-7z-compressed 7z;
+  application/x-cocoa cco;
+  application/x-java-archive-diff jardiff;
+  application/x-java-jnlp-file jnlp;
+  application/x-makeself run;
+  application/x-perl pl pm;
+  application/x-pilot prc pdb;
+  application/x-rar-compressed rar;
+  application/x-redhat-package-manager  rpm;
+  application/x-sea sea;
+  application/x-shockwave-flash swf;
+  application/x-stuffit sit;
+  application/x-tcl tcl tk;
+  application/x-x509-ca-cert der pem crt;
+  application/x-xpinstall xpi;
+  application/xhtml+xml xhtml;
+  application/zip zip;
+  application/octet-stream bin exe dll;
+  application/octet-stream deb;
+  application/octet-stream dmg;
+  application/octet-stream eot;
+  application/octet-stream iso img;
+  application/octet-stream msi msp msm;
+  application/json json;
+  audio/midi mid midi kar;
+  audio/mpeg mp3;
+  audio/ogg ogg;
+  audio/x-m4a m4a;
+  audio/x-realaudio ra;
+  video/3gpp 3gpp 3gp;
+  video/mp4 mp4;
+  video/mpeg mpeg mpg;
+  video/quicktime mov;
+  video/webm webm;
+  video/x-flv flv;
+  video/x-m4v m4v;
+  video/x-mng mng;
+  video/x-ms-asf asx asf;
+  video/x-ms-wmv wmv;
+  video/x-msvideo avi;
+}

fixtures/templated_with_include/nginx.conf

@@ -0,0 +1,2 @@
+worker_processes 1;
+include custom.conf;

fixtures/templated_with_include/public/index.html

@@ -0,0 +1 @@
+<p>Exciting Content</p>

fixtures/templated_with_include/sym-nginxconf

@@ -0,0 +1,38 @@
+worker_processes 1;
+daemon off;
+
+error_log stderr;
+events { worker_connections 1024; }
+
+http {
+  charset utf-8;
+  log_format cloudfoundry 'NginxLog "$request" $status $body_bytes_sent';
+  access_log /dev/stdout cloudfoundry;
+  default_type application/octet-stream;
+  include mime.types;
+  sendfile on;
+
+  tcp_nopush on;
+  keepalive_timeout 30;
+  port_in_redirect off; # Ensure that redirects don't include the internal container PORT - 8080
+
+  server {
+    listen {{port}};
+    root public;
+    index index.html index.htm Default.htm;
+
+    # configuration endpoint
+    location /test {
+      default_type application/json;
+
+      set $override "{{env "OVERRIDE"}}";
+
+      if ($override != '') {
+          return 200 "{{env "OVERRIDE"}}";
+      }
+
+      return 200 "No overrides happening! \"abc\"";
+    }
+  }
+}
+

fixtures/templated_with_include/sym-public/index.html

@@ -0,0 +1 @@
+<p>Exciting Content</p>

fixtures/templated_with_include/sym-public/test.json

@@ -0,0 +1 @@
+{ "abcd": 12345 }

go.mod

@@ -1,14 +1,23 @@
 module github.com/cloudfoundry/nginx-buildpack
 
 require (
-	github.com/cloudfoundry/libbuildpack v0.0.0-20210203171418-e004e3b143a6
+	github.com/cloudfoundry/libbuildpack v0.0.0-20210204163631-5a211522c675
+	github.com/elazarl/goproxy v0.0.0-20210110162100-a92cc753f88e // indirect
+	github.com/elazarl/goproxy/ext v0.0.0-20210110162100-a92cc753f88e // indirect
 	github.com/golang/mock v1.4.4
-	github.com/miekg/dns v1.1.15
-	github.com/nxadm/tail v1.4.6 // indirect
+	github.com/golang/protobuf v1.4.3 // indirect
+	github.com/google/go-cmp v0.5.4 // indirect
+	github.com/miekg/dns v1.1.38
+	github.com/nxadm/tail v1.4.8 // indirect
 	github.com/onsi/ginkgo v1.15.0
-	github.com/onsi/gomega v1.10.4
-	golang.org/x/crypto v0.0.0-20201002170205-7f63de1d35b0 // indirect
+	github.com/onsi/gomega v1.10.5
+	golang.org/x/crypto v0.0.0-20201221181555-eec23a3978ad // indirect
+	golang.org/x/net v0.0.0-20210119194325-5f4716e94777 // indirect
 	golang.org/x/sys v0.0.0-20210124154548-22da62e12c0c // indirect
+	golang.org/x/text v0.3.5 // indirect
+	golang.org/x/tools v0.1.0 // indirect
+	google.golang.org/protobuf v1.25.0 // indirect
+	gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c // indirect
 	gopkg.in/yaml.v2 v2.4.0
 )