refactor: improve cli

Author: Je

cli.ts

@@ -1,7 +1,7 @@
 import { createHtml } from './html.ts'
 import log from './log.ts'
 import { getContentType } from './server/mime.ts'
-import { listenAndServe, path, ServerRequest } from './std.ts'
+import { listenAndServe, path, ServerRequest, walk } from './std.ts'
 import util from './util.ts'
 import { version } from './version.ts'
 
@@ -23,7 +23,7 @@ Options:
     -v, --version  Prints version number
 `
 
-function main() {
+async function main() {
     // parse deno args
     const args: Array<string> = []
     const argOptions: Record<string, string | boolean> = {}
@@ -142,6 +142,23 @@ function main() {
         }
     }
 
+    if (!hasCommand) {
+        const walkOptions = { includeDirs: false, exts: ['.js', '.jsx', '.mjs', '.ts', '.tsx'], skip: [/\.d\.ts$/i], dep: 1 }
+        const pagesDir = path.join(path.resolve(args[0] || '.'), 'pages')
+        let hasIndexPage = false
+        if (util.existsDir(pagesDir)) {
+            for await (const { path: p } of walk(pagesDir, walkOptions)) {
+                if (path.basename(p).split('.')[0] === 'index') {
+                    hasIndexPage = true
+                }
+            }
+        }
+        if (!hasIndexPage) {
+            console.log(helpMessage)
+            Deno.exit(0)
+        }
+    }
+
     // execute command
     const command = hasCommand ? args.shift() : 'dev'
     import(`./cli/${command}.ts`).then(({ default: cmd }) => {

cli/dev.ts

@@ -14,6 +14,6 @@ Options:
     -h, --help  Prints help message
 `
 
-export default function (appDir: string, options: Record<string, string | boolean>) {
-    start(appDir, parseInt(String(options.port || options.p)) || 8080, true)
+export default function (appDir: string, options: { port?: string, p?: string }) {
+    start(appDir, parseInt(options.port || options.p || '8080') || 8080, true)
 }

project.ts

@@ -381,7 +381,7 @@ export default class Project {
         const pagesDir = path.join(this.srcDir, 'pages')
 
         if (!(util.existsDir(pagesDir))) {
-            log.fatal('please create some pages.')
+            log.fatal(`'pages' directory not found.`)
         }
 
         Object.assign(globalThis, {