feat: compile systemInit and inject to autoExec

api/src/controllers/internal/Execution.ts

@@ -18,10 +18,6 @@ export class ExecutionController {
 
     let program = await readFile(programPath)
 
-    Object.keys(vars).forEach(
-      (key: string) => (program = `%let ${key}=${vars[key]};\n${program}`)
-    )
-
     const sessionController = getSessionController()
 
     const session = await sessionController.getSession()
@@ -38,7 +34,12 @@ export class ExecutionController {
       preProgramVariables?.accessToken ?? 'accessToken'
     )
 
-    program = `
+    const varStatments = Object.keys(vars).reduce(
+      (computed: string, key: string) =>
+        `${computed}%let ${key}=${vars[key]};\n`,
+      ''
+    )
+    const preProgramVarStatments = `
 %let _sasjs_tokenfile=${tokenFile};
 %let _sasjs_username=${preProgramVariables?.username};
 %let _sasjs_userid=${preProgramVariables?.userId};
@@ -47,8 +48,17 @@ export class ExecutionController {
 %let _sasjs_apipath=/SASjsApi/stp/execute;
 %let _metaperson=&_sasjs_displayname;
 %let _metauser=&_sasjs_username;
-%let sasjsprocessmode=Stored Program;
+%let sasjsprocessmode=Stored Program;`
+
+    program = `
+/* runtime vars */
+${varStatments}
 filename _webout "${weboutPath}";
+
+/* dynamic user-provided vars */
+${preProgramVarStatments}
+
+/* actual job code */
 ${program}`
 
     // if no files are uploaded filesNamesMap will be undefined

api/src/controllers/internal/Session.ts

@@ -2,12 +2,17 @@ import path from 'path'
 import { Session } from '../../types'
 import { promisify } from 'util'
 import { execFile } from 'child_process'
-import { getTmpSessionsFolderPath, generateUniqueFileName } from '../../utils'
+import {
+  getTmpSessionsFolderPath,
+  generateUniqueFileName,
+  sysInitCompiledPath
+} from '../../utils'
 import {
   deleteFolder,
   createFile,
   fileExists,
-  generateTimestamp
+  generateTimestamp,
+  readFile
 } from '@sasjs/utils'
 
 const execFilePromise = promisify(execFile)
@@ -52,9 +57,13 @@ export class SessionController {
     // we clean them up after a predefined period, if unused
     this.scheduleSessionDestroy(session)
 
+    // Place compiled system init code to autoexec
+    const compiledSystemInitContent = await readFile(sysInitCompiledPath)
+
     // the autoexec file is executed on SAS startup
     const autoExecPath = path.join(sessionFolder, 'autoexec.sas')
-    await createFile(autoExecPath, autoExecContent)
+    const contentForAutoExec = `/* compiled systemInit */\n${compiledSystemInitContent}\n/* autoexec */\n${autoExecContent}`
+    await createFile(autoExecPath, contentForAutoExec)
 
     // create empty code.sas as SAS will not start without a SYSIN
     const codePath = path.join(session.path, 'code.sas')

api/src/controllers/stp.ts

@@ -14,7 +14,6 @@ import {
 import { ExecutionController } from './internal'
 import { PreProgramVars } from '../types'
 import { getTmpFilesFolderPath, makeFilesNamesMap } from '../utils'
-import { request } from 'https'
 
 interface ExecuteReturnJsonPayload {
   /**