Install /etc/hosts entries from bootstrap script.

This allows to add an entry which is not pointing to localhost but
to a docker container in the Travis virtual env.

.travis.yml

@@ -1,4 +1,5 @@
 language: node_js
+required: sudo
 node_js:
 - '9'
 services:
@@ -12,20 +13,6 @@ addons:
     packages:
     - libgif-dev
     - google-chrome-stable
-  hosts:
-  - admin.example.com
-  - login.example.com
-  - singlefactor.example.com
-  - dev.example.com
-  - home.example.com
-  - mx1.mail.example.com
-  - mx2.mail.example.com
-  - public.example.com
-  - secure.example.com
-  - authelia.example.com
-  - admin.example.com
-  - mail.example.com
-  - duo.example.com
 
 before_script:
 - export DISPLAY=:99.0

bootstrap.sh

@@ -24,25 +24,6 @@ then
   return;
 fi
 
-echo "[BOOTSTRAP] Checking if example.com domain is forwarded to your machine..."
-cat /etc/hosts | grep "login.example.com" > /dev/null
-if [ $? -ne 0 ];
-then
-  echo "[ERROR] Please add those lines to /etc/hosts:
-  
-127.0.0.1       home.example.com
-127.0.0.1       public.example.com
-127.0.0.1       secure.example.com
-127.0.0.1       dev.example.com
-127.0.0.1       admin.example.com
-127.0.0.1       mx1.mail.example.com
-127.0.0.1       mx2.mail.example.com
-127.0.0.1       singlefactor.example.com
-127.0.0.1       login.example.com
-192.168.240.100 duo.example.com"
-  return;
-fi
-
 echo "[BOOTSTRAP] Running additional bootstrap steps..."
 authelia-scripts bootstrap
 

scripts/authelia-scripts-bootstrap

@@ -3,12 +3,59 @@
 var { exec } = require('./utils/exec');
 var fs = require('fs');
 
-async function main() {
+async function buildDockerImages() {
+  console.log("[BOOTSTRAP] Building required Docker images...");
+
   console.log('Build authelia-example-backend docker image.')
   await exec('docker build -t authelia-example-backend example/compose/nginx/backend');
 
   console.log('Build authelia-duo-api docker image.')
   await exec('docker build -t authelia-duo-api example/compose/duo-api');
+}
+
+async function checkHostsFile() {
+  async function checkAndFixEntry(entries, domain, ip) {
+    const foundEntry = entries.filter(l => l[1] == domain);
+    if (foundEntry.length > 0) {
+      if (foundEntry[0][0] == ip) {
+        // The entry exists and is correct.
+        return;
+      }
+      else {
+        // We need to remove the entry and replace it.
+        console.log(`Update entry for ${domain}.`);
+        await exec(`cat /etc/hosts | grep -v "${domain}" | /usr/bin/sudo tee /etc/hosts > /dev/null`);
+        await exec(`echo "${ip} ${domain}" | /usr/bin/sudo tee -a /etc/hosts > /dev/null`); 
+      }
+    }
+    else {
+      // We need to add the new entry.
+      console.log(`Add entry for ${domain}.`);
+      await exec(`echo "${ip} ${domain}" | /usr/bin/sudo tee -a /etc/hosts > /dev/null`);
+    }
+  }
+
+  console.log("[BOOTSTRAP] Checking if example.com domain is forwarded to your machine...");
+  const actualEntries = fs.readFileSync("/etc/hosts").toString("utf-8")
+    .split("\n").filter(l => l !== '').map(l => l.split(" ").filter(w => w !== ''));
+
+  await checkAndFixEntry(actualEntries, 'login.example.com', '127.0.0.1');
+  await checkAndFixEntry(actualEntries, 'admin.example.com', '127.0.0.1');
+  await checkAndFixEntry(actualEntries, 'singlefactor.example.com', '127.0.0.1');
+  await checkAndFixEntry(actualEntries, 'dev.example.com', '127.0.0.1');
+  await checkAndFixEntry(actualEntries, 'home.example.com', '127.0.0.1');
+  await checkAndFixEntry(actualEntries, 'mx1.mail.example.com', '127.0.0.1');
+  await checkAndFixEntry(actualEntries, 'mx2.mail.example.com', '127.0.0.1');
+  await checkAndFixEntry(actualEntries, 'public.example.com', '127.0.0.1');
+  await checkAndFixEntry(actualEntries, 'secure.example.com', '127.0.0.1');
+  await checkAndFixEntry(actualEntries, 'authelia.example.com', '127.0.0.1');
+  await checkAndFixEntry(actualEntries, 'mail.example.com', '127.0.0.1');
+
+  await checkAndFixEntry(actualEntries, 'duo.example.com', '192.168.240.100');
+}
+
+async function checkKubernetesDependencies() {
+  console.log("[BOOTSTRAP] Checking Kubernetes tools in /tmp to allow testing a Kube cluster... (no junk installed on host)");
 
   if (!fs.existsSync('/tmp/kind')) {
     console.log('Install Kind for spawning a Kubernetes cluster.');
@@ -21,6 +68,12 @@ async function main() {
   }
 }
 
+async function main() {
+  await checkHostsFile();
+  await buildDockerImages();
+  await checkKubernetesDependencies();
+}
+
 main().catch((err) => {
   console.error(err);
   process.exit(1);