fixed conpty detection (fixes #653)

terminus-terminal/src/components/shellSettingsTab.component.ts

-import * as os from 'os'
 import { Component } from '@angular/core'
 import { NgbModal } from '@ng-bootstrap/ng-bootstrap'
 import { Subscription } from 'rxjs'
@@ -6,7 +5,7 @@ import { ConfigService, ElectronService, HostAppService, Platform } from 'termin
 import { EditProfileModalComponent } from './editProfileModal.component'
 import { IShell, Profile } from '../api'
 import { TerminalService } from '../services/terminal.service'
-import { UACService } from '../services/uac.service'
+import { WIN_BUILD_CONPTY_SUPPORTED, WIN_BUILD_CONPTY_STABLE, isWindowsBuild } from '../utils'
 
 @Component({
     template: require('./shellSettingsTab.component.pug'),
@@ -20,7 +19,6 @@ export class ShellSettingsTabComponent {
     private configSubscription: Subscription
 
     constructor (
-        uac: UACService,
         public config: ConfigService,
         public hostApp: HostAppService,
         private electron: ElectronService,
@@ -32,10 +30,9 @@ export class ShellSettingsTabComponent {
             this.reload()
         })
         this.reload()
-        this.isConPTYAvailable = uac.isAvailable
-        this.isConPTYStable = hostApp.platform === Platform.Windows
-            && parseFloat(os.release()) >= 10
-            && parseInt(os.release().split('.')[2]) >= 18309
+
+        this.isConPTYAvailable = isWindowsBuild(WIN_BUILD_CONPTY_SUPPORTED)
+        this.isConPTYStable = isWindowsBuild(WIN_BUILD_CONPTY_STABLE)
     }
 
     async ngOnInit () {

terminus-terminal/src/services/sessions.service.ts

@@ -7,6 +7,7 @@ import { Injectable } from '@angular/core'
 import { Logger, LogService, ConfigService } from 'terminus-core'
 import { exec } from 'mz/child_process'
 import { SessionOptions } from '../api'
+import { WIN_BUILD_CONPTY_SUPPORTED, isWindowsBuild } from '../utils'
 
 let macOSNativeProcessList
 try {
@@ -118,7 +119,8 @@ export class Session extends BaseSession {
             rows: options.height || 30,
             cwd,
             env: env,
-            experimentalUseConpty: this.config.store.terminal.useConPTY && 1,
+            // `1` instead of `true` forces ConPTY even if unstable
+            experimentalUseConpty: (isWindowsBuild(WIN_BUILD_CONPTY_SUPPORTED) && this.config.store.terminal.useConPTY) ? 1 : false,
         })
 
         this.guessedCWD = cwd

terminus-terminal/src/services/uac.service.ts

 import * as path from 'path'
-import * as os from 'os'
 import { Injectable } from '@angular/core'
-import { ElectronService, HostAppService, Platform } from 'terminus-core'
+import { ElectronService } from 'terminus-core'
 import { SessionOptions } from '../api'
 
+import { WIN_BUILD_CONPTY_SUPPORTED, isWindowsBuild } from '../utils'
+
 @Injectable({ providedIn: 'root' })
 export class UACService {
     isAvailable = false
 
     constructor (
-        hostApp: HostAppService,
         private electron: ElectronService,
     ) {
-        this.isAvailable = hostApp.platform === Platform.Windows
-            && parseFloat(os.release()) >= 10
-            && parseInt(os.release().split('.')[2]) >= 17692
+        this.isAvailable = isWindowsBuild(WIN_BUILD_CONPTY_SUPPORTED)
     }
 
     patchSessionOptionsForUAC (sessionOptions: SessionOptions): SessionOptions {

terminus-terminal/src/utils.ts

+import * as os from 'os'
+
+export const WIN_BUILD_CONPTY_SUPPORTED = 17692
+export const WIN_BUILD_CONPTY_STABLE = 18309
+
+export function isWindowsBuild (build: number): boolean {
+    return process.platform === 'win32' && parseFloat(os.release()) >= 10 && parseInt(os.release().split('.')[2]) >= build
+}