Build command is working

bin/node-hugo.js

 #!/usr/bin/env node
 
+//////////////////////////////////////////////////////////////////////
+//
+// node-hugo command-line interface (CLI).
+//
+// Copyright (c) 2020 Aral Balkan. All Rights Reserved.
+// Licensed under AGPLv3 or later.
+//
+// Note: this CLI is not really useful; just use hugo directly :)
+// ===== I built it to have an easy way to test the functionality
+//       as I was building it. (node-hugo is useful when integrated
+//       into an existing app, like Site.js – https://sitejs.org).
+//
+//////////////////////////////////////////////////////////////////////
+
 (async function main () {
   const Hugo = require('../index.js')
   const hugo = new Hugo()
@@ -13,14 +27,35 @@
       showUsage()
       process.exit(1)
     }
-    console.log(`[Hugo] Build. Source: ${sourcePath} Destination: ${destinationPath}`)
+    console.log(`\n[Hugo] Build. Source: ${sourcePath} Destination: ${destinationPath}\n`)
+
+    let result
+    try {
+      result = await hugo.build(sourcePath, destinationPath)
+    } catch (error) {
+      console.log(error.message, error.output)
+      exit(1)
+    }
 
-    const result = hugo.build(sourcePath, destinationPath)
+    // Build ok.
+    const hugoOutput = result.split('\n')
+    hugoOutput.forEach(line => {
+      if (line.includes('WARN')) {
+        line = ` ⚠ ${line}`
+      }
+      line = `[node-hugo] ${line}`
+      console.log(line)
+    })
 
-    console.log(result)
   } else if (command === 'serve') {
+    //
+    // TODO
+    //
     console.log('serve (todo)', process.argv[3])
   } else {
+    //
+    // Error.
+    //
     console.log(`\nUnknown command (${command})`)
     showUsage()
   }

index.js

@@ -9,6 +9,14 @@ const exec = util.promisify(childProcess.exec)
 
 const homeDir = os.homedir()
 
+class HugoError extends Error {
+  constructor (message, output) {
+    super(message)
+    this.sdterr = output
+    this.name = 'HugoError'
+  }
+}
+
 class Hugo {
   constructor (nodeHugoDir = path.join(homeDir, '.small-tech.org', 'node-hugo')) {
 
@@ -40,8 +48,13 @@ class Hugo {
       env: process.env
     }
     const result = await exec(hugoBuildCommand, options)
-    console.log('Hugo build result', result)
-    return result
+
+    if (result.stderr !== '') {
+      // There was an error.
+      throw new HugoError('Build failed', result.stderr)
+    }
+
+    return result.stdout
   }
 
   // Starts a Hugo server at the requested path to serve and returns the Hugo server instance.
@@ -105,4 +118,5 @@ class Hugo {
   }
 }
 
+
 module.exports = Hugo