restructured build.ts and added a helpcommand

src/main.ts

@@ -1,22 +1,59 @@
 import { existsSync, lstatSync, readdirSync, unlinkSync } from 'fs'
 import commandLineArgs from 'command-line-args'
-import { resolveConfig } from 'prettier'
 import { DistBase, ScriptBase, ScriptPath } from './paths'
 import { readmeData, updateReadmeFile } from './readmefile'
 import runBuild from './build'
 import { UserScriptMetaFull } from './types'
+import * as Path from 'path'
 
-export interface CLIArgs {
+export interface CLIArgsT {
     watch: boolean
     minify: boolean
     prettier: boolean
+    srccomment: boolean
+    help: boolean
 }
 
-const CLIArgs = commandLineArgs([
+export const CLIArgs = commandLineArgs([
     { name: 'watch', alias: 'w', type: Boolean, defaultValue: false },
     { name: 'minify', alias: 'm', type: Boolean, defaultValue: false },
     { name: 'prettier', alias: 'p', type: Boolean, defaultValue: false },
-]) as CLIArgs
+    { name: 'srccomment', alias: 's', type: Boolean, defaultValue: false },
+    { name: 'help', alias: 'h', type: Boolean, defaultValue: false },
+]) as CLIArgsT
+
+if (CLIArgs.help) {
+    let command = '<command>'
+    if (process.argv.length > 0) {
+        command = Path.parse(process.argv[0]).name
+    }
+    if (command.toLowerCase() === 'node' && process.argv.length > 1) {
+        let path = Path.relative(process.cwd(), process.argv[1]) || '.'
+        command = `${command} ${path}`
+    }
+
+    console.log(`
+Usage: ${command} [options]
+
+options:
+--watch
+    alias: -w
+    automatically recompile on save
+--minify
+    alias: -m
+    minify output files
+--prettier
+    alias: -p
+    prettify output files
+--srccomment
+    alias: -s
+    include src file path comments in the output files, i.e. // scripts/example/main.ts
+--help
+    alias: -h
+    show this help message
+`)
+    process.exit(0)
+}
 
 //if package.json doesn't exist then there is no point in continuing
 if (!existsSync('package.json') || !lstatSync('package.json').isFile()) {
@@ -27,15 +64,6 @@ if (!existsSync('package.json') || !lstatSync('package.json').isFile()) {
 //delete compiled scripts
 readdirSync(DistBase).forEach(file => unlinkSync(`${DistBase}/${file}`))
 
-//read prettierrc file and make sure `babel` is the configured parser
-const PrettierConfig = (() => {
-    let config = resolveConfig.sync(process.cwd()) || {}
-    return {
-        ...config,
-        parser: 'babel',
-    }
-})()
-
 //compile scripts
 let scripts = readdirSync(ScriptBase)
 let scriptMeta: readmeData[] = []
@@ -61,12 +89,7 @@ for (let name of scripts) {
             updateReadmeFile(scriptMeta)
         }
 
-        let [meta, error] = runBuild(
-            name,
-            postWatchUpdate,
-            PrettierConfig,
-            CLIArgs
-        )
+        let [meta, error] = runBuild(name, postWatchUpdate)
         scriptMeta[id] = { meta, error }
 
         console.log(name, meta.version)