[build] added environ setup in haxe tasks

tasks/haxe.js

@@ -51,6 +51,36 @@ class Haxe extends Sdk {
         }
     }
 
+    static get pamFile() {
+        return `${os.homedir()}/.pam_environment`;
+    }
+
+    checkEnviron() {
+        if (fs.existsSync(Haxe.pamFile)) {
+            const data = fs.readFileSync(Haxe.pamFile, 'utf8');
+            // ToDo: parse file
+            if (data.indexOf('HAXE_VERSION')) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    setupEnviron() {
+        if (this.checkEnviron()) return;
+        // ToDo: parse file
+        const haxeVersion = `HAXE_VERSION=${this.version}`;
+        const haxeStdPath = `HAXE_STD_PATH=${this.binPath}/std`;
+        const haxeHome = `HAXE_HOME=${this.binPath}`;
+        const pathDefault = `PATH DEFAULT="\${PATH}:${this.binPath}"`;
+        const data = [haxeVersion, haxeStdPath, haxeHome, pathDefault, ''];
+        fs.appendFileSync(Haxe.pamFile, data.join('\n'));
+    }
+
+    prepare() {
+        return super.prepare().then(() => this.setupEnviron());
+    }
+
     get link() {
         if (Sdk.System.isWindows) {
             return `https://github.com/HaxeFoundation/haxe/releases/download/${this.version}/haxe-${this.version}-win.zip`;