The bot will now only re-compile when changed

The bot will now only re-compile when the plugins or source code changes. (computed using a hash)

This reduces the average startup time by 50%.

index.js

@@ -1,16 +1,92 @@
-const fs = require("fs")
-const ts = require("typescript")
-const nodepath = require('path')
-
 /////////////// STARTUP FLAGS ///////////////
 const flags = [
+    // Edit flags here when being unable to use the flags in the command prompt.
     //PTERODACTYL PANEL
     //add startup flags here (e.g. "--no-compile") when running via the panel
 ]
 process.argv.push(...flags)
 /////////////// STARTUP FLAGS ///////////////
 
+/*
+ ██████╗ ██████╗ ███████╗███╗   ██╗    ████████╗██╗ ██████╗██╗  ██╗███████╗████████╗  
+██╔═══██╗██╔══██╗██╔════╝████╗  ██║    ╚══██╔══╝██║██╔════╝██║ ██╔╝██╔════╝╚══██╔══╝  
+██║   ██║██████╔╝█████╗  ██╔██╗ ██║       ██║   ██║██║     █████╔╝ █████╗     ██║     
+██║   ██║██╔═══╝ ██╔══╝  ██║╚██╗██║       ██║   ██║██║     ██╔═██╗ ██╔══╝     ██║     
+╚██████╔╝██║     ███████╗██║ ╚████║       ██║   ██║╚██████╗██║  ██╗███████╗   ██║     
+ ╚═════╝ ╚═╝     ╚══════╝╚═╝  ╚═══╝       ╚═╝   ╚═╝ ╚═════╝╚═╝  ╚═╝╚══════╝   ╚═╝     
+ v4.0.0 - Made by DJj123dj & Contributors
+
+ Discord: https://discord.dj-dj.be
+ Docs: https://otdocs.dj-dj.be
+ Support Us: https://github.com/sponsors/DJj123dj/
+ 
+ */
+///////////////////////////////////////////
+////////// COMPILATION + STARTUP //////////
+///////////////////////////////////////////
+const fs = require("fs")
+const ts = require("typescript")
+const {createHash,Hash} = require("crypto")
+const nodepath = require('path')
+
+/** ## What is this?
+ * This is a function which compares `./src/` with a hash stored in `./dist/hash.txt`.
+ * The hash is based on the modified date & file metadata of all files in `./src/`.
+ * 
+ * If the hash is different, the bot will automatically re-compile.
+ * This will help you save CPU resources because the bot shouldn't re-compile when nothing has been changed :)
+ * 
+ * @param {string} dir
+ * @param {Hash|null} upperHash
+ */
+function computeSourceHash(dir,upperHash){
+    const hash = upperHash ? upperHash : createHash("sha256")
+    const info = fs.readdirSync(dir,{withFileTypes:true})
+    
+    for (const file of info) {
+        const fullPath = nodepath.join(dir,file.name)
+        if (file.isFile()){
+            const statInfo = fs.statSync(fullPath)
+            //compute hash using file metadata
+            const fileInfo = `${fullPath}:${statInfo.size}:${statInfo.mtimeMs}`
+            hash.update(fileInfo)
+            
+        }else if (file.isDirectory()){
+            //recursively compute all folders
+            computeSourceHash(fullPath,hash)
+        }
+    }
+    //return when not being called recursively
+    if (!upperHash) {
+        return hash.digest("hex")
+    }
+}
+function requiresCompilation(){
+    //check hashes when not using "--compile-only" flag
+    if (process.argv.includes("--compile-only")) return true
+
+    console.log("OT: Comparing prebuilds with source...")
+    const sourceHash = computeSourceHash("./src/")
+    const pluginHash = computeSourceHash("./plugins/")
+    const hash = sourceHash+":"+pluginHash
+
+    if (fs.existsSync("./dist/hash.txt")){
+        const distHash = fs.readFileSync("./dist/hash.txt").toString()
+        if (distHash === hash) return false
+        else return true
+    }else return true
+}
+function saveNewCompilationHash(){
+    const sourceHash = computeSourceHash("./src/")
+    const pluginHash = computeSourceHash("./plugins/")
+    const hash = sourceHash+":"+pluginHash
+    fs.writeFileSync("./dist/hash.txt",hash)
+}
+
 if (!process.argv.includes("--no-compile")){
+    if (requiresCompilation()){
+        console.log("OT: Compilation Required...")
+
         //REMOVE EXISTING BUILDS
         console.log("OT: Removing Prebuilds...")
         fs.rmSync("./dist",{recursive:true,force:true})
@@ -48,6 +124,10 @@ if (!process.argv.includes("--no-compile")){
             console.log("OT: Compilation Failed!")
             process.exit(1)
         }
+    }else console.log("OT: No Compilation Required...")
+
+    //save new compilation hash
+    saveNewCompilationHash()
 }
 
 //START BOT