Initial changes to error messages

lib/build-files.js

@@ -16,5 +16,17 @@ require("babel-register")({
   presets: ["react", "latest"]
 });
 
+// initial check that required files are present
+const chalk = require("chalk");
+const fs = require("fs");
+const CWD = process.cwd();
+
+if (!fs.existsSync(CWD + "/siteConfig.js")) {
+  console.error(
+    chalk.red("Error: No siteConfig.js file found in website folder!")
+  );
+  process.exit(1);
+}
+
 const generate = require("./server/generate.js");
 generate();

lib/core/nav/HeaderNav.js

@@ -128,6 +128,12 @@ class HeaderNav extends React.Component {
           "-" +
           link.doc;
       }
+      if (!Metadata[id]) {
+        throw new Error(
+          "A headerLink is specified with a document that does not exist. No document exists with id: " +
+            link.doc
+        );
+      }
       href = this.props.config.baseUrl + Metadata[id].permalink;
     } else if (link.page) {
       if (fs.existsSync(CWD + "/pages/en/" + link.page + ".js")) {

lib/server/readCategories.js

@@ -56,7 +56,7 @@ function readCategories(sidebar) {
       if (metadata.next) {
         if (!articles[metadata.next]) {
           throw new Error(
-            "`next: " + metadata.next + "` in " + metadata.id + " doesn't exist"
+            "Improper sidebars.json file. Make sure that documents with the ids specified in sidebars.json exist and that no ids are repeated."
           );
         }
         previous[articles[metadata.next].id] = metadata.id;

lib/server/readMetadata.js

@@ -32,7 +32,12 @@ if (fs.existsSync(CWD + "/languages.js")) {
 }
 
 function readSidebar() {
-  let allSidebars = require(CWD + "/sidebars.json");
+  let allSidebars;
+  if (fs.existsSync(CWD + "/sidebars.json")) {
+    allSidebars = require(CWD + "/sidebars.json");
+  } else {
+    allSidebars = {};
+  }
   Object.assign(allSidebars, versionFallback.sidebarData());
 
   const order = {};

lib/server/server.js

@@ -157,6 +157,10 @@ function execute(port) {
     });
 
     const metadata = Metadata[links[url]];
+    if (!metadata) {
+      next();
+      return;
+    }
     const language = metadata.language;
 
     let file;
@@ -438,7 +442,6 @@ function execute(port) {
     res.send(cssContent);
   });
 
-  /* serve static content first from user folder then from docusaurus */
   app.use(
     siteConfig.baseUrl + "docs/assets/",
     express.static(CWD + "/../docs/assets")

lib/start-server.js

@@ -16,6 +16,18 @@ require("babel-register")({
   presets: ["react", "latest"]
 });
 
+// initial check that required files are present
+const chalk = require("chalk");
+const fs = require("fs");
+const CWD = process.cwd();
+
+if (!fs.existsSync(CWD + "/siteConfig.js")) {
+  console.error(
+    chalk.red("Error: No siteConfig.js file found in website folder!")
+  );
+  process.exit(1);
+}
+
 const program = require("commander");
 
 program.option("--port <number>", "Specify port number").parse(process.argv);

package.json

@@ -11,6 +11,7 @@
     "babel-register": "^6.24.1",
     "babel-traverse": "^6.25.0",
     "babylon": "^6.17.4",
+    "chalk": "^2.1.0",
     "classnames": "^2.2.5",
     "commander": "^2.11.0",
     "diff": "^3.3.0",