Fix one (of many) build issues on Windows

.github/workflows/ci.yml

@@ -13,16 +13,15 @@ jobs:
     name: ${{ matrix.friendlyName }}
     runs-on: ${{ matrix.os }}
     timeout-minutes: 10
-
     strategy:
       fail-fast: false
       matrix:
-        node: [14.15.4]
+        node: [12.14.1]
-        os: [macos-latest, windows-latest, ubuntu-18.04]
+        os: [macos-10.14, windows-2019, ubuntu-18.04]
         include:
-          - os: macos-latest
+          - os: macos-10.14
             friendlyName: macOS
-          - os: windows-latest
+          - os: windows-2019
             friendlyName: Windows
           - os: ubuntu-18.04
             friendlyName: Linux
@@ -34,33 +33,19 @@ jobs:
         uses: actions/setup-node@v1
         with:
           node-version: ${{ matrix.node }}
-
-      # This step can be removed as soon as official Windows arm64 builds are published:
-      # https://github.com/nodejs/build/issues/2450#issuecomment-705853342
-      - run: |
-          $NodeVersion = (node --version) -replace '^.'
-          $NodeFallbackVersion = "15.8.0"
-          & .\script\download-node-lib-win-arm64.ps1 $NodeVersion $NodeFallbackVersion
-        if: ${{ matrix.os == 'windows-latest' }}
-        name: Install Windows arm64 node.lib
-
       - name: Install and build
-        run: |
+        run: yarn
-          yarn install
-          yarn build
       - name: Lint
         run: yarn lint
       - name: Test
         run: yarn test
         shell: bash
-      - name: Prebuild (x64)
+      - name: Prebuild Node x64
-        run: npm run prebuild-napi-x64
+        run: yarn prebuild-node
-      - name: Prebuild (arm64)
+      - name: Prebuild Electron x64
-        run: npm run prebuild-napi-arm64
+        run: yarn prebuild-electron
-        if: ${{ matrix.os != 'ubuntu-18.04' }}
+      - name: Prebuild Electron arm64
-      - name: Prebuild (Windows x86)
+        run: yarn prebuild-electron-arm64
-        run: npm run prebuild-napi-ia32
-        if: ${{ matrix.os == 'windows-latest' }}
       - name: Publish
         if: github.event_name == 'push' && startsWith(github.ref, 'refs/tags/')
         run: yarn upload

.github/workflows/codeql-analysis.yml

@@ -1,70 +0,0 @@
-# For most projects, this workflow file will not need changing; you simply need
-# to commit it to your repository.
-#
-# You may wish to alter this file to override the set of languages analyzed,
-# or to provide custom queries or build logic.
-#
-# ******** NOTE ********
-# We have attempted to detect the languages in your repository. Please check
-# the `language` matrix defined below to confirm you have the correct set of
-# supported CodeQL languages.
-#
-name: "CodeQL"
-
-on:
-  push:
-    branches: [ main ]
-  pull_request:
-    # The branches below must be a subset of the branches above
-    branches: [ main ]
-  schedule:
-    - cron: '45 23 * * 1'
-
-jobs:
-  analyze:
-    name: Analyze
-    runs-on: ubuntu-latest
-    permissions:
-      actions: read
-      contents: read
-      security-events: write
-
-    strategy:
-      fail-fast: false
-      matrix:
-        language: [ 'cpp', 'javascript', 'python' ]
-        # CodeQL supports [ 'cpp', 'csharp', 'go', 'java', 'javascript', 'python', 'ruby' ]
-        # Learn more about CodeQL language support at https://git.io/codeql-language-support
-
-    steps:
-    - name: Checkout repository
-      uses: actions/checkout@v2
-
-    # Initializes the CodeQL tools for scanning.
-    - name: Initialize CodeQL
-      uses: github/codeql-action/init@v1
-      with:
-        languages: ${{ matrix.language }}
-        # If you wish to specify custom queries, you can do so here or in a config file.
-        # By default, queries listed here will override any specified in a config file.
-        # Prefix the list here with "+" to use these queries and those in the config file.
-        # queries: ./path/to/local/query, your-org/your-repo/queries@main
-
-    # Autobuild attempts to build any compiled languages  (C/C++, C#, or Java).
-    # If this step fails, then you should remove it and run the build manually (see below)
-    - name: Autobuild
-      uses: github/codeql-action/autobuild@v1
-
-    # ℹ️ Command-line programs to run using the OS shell.
-    # 📚 https://git.io/JvXDl
-
-    # ✏️ If the Autobuild fails above, remove it and uncomment the following three lines
-    #    and modify them (or add more) to build your code if your project
-    #    uses a compiled language
-
-    #- run: |
-    #   make bootstrap
-    #   make release
-
-    - name: Perform CodeQL Analysis
-      uses: github/codeql-action/analyze@v1

README.md

@@ -2,7 +2,7 @@
 
 A cross-platform no-dependency C executable trampoline which lets GitHub Desktop
 intercede in order to provide Git with any additional info it needs (like
-credentials through `GIT_ASKPASS` or `SSH_ASKPASS`).
+credentials through `GIT_ASKPASS`).
 
 The intention is to support the same platforms that
 [Electron supports](https://www.electronjs.org/docs/tutorial/support#supported-platforms).
@@ -125,15 +125,3 @@ Thanks to this, with only one generic trampoline that forwards everything via
 that TCP socket, the implementation for every possible protocol like
 `GIT_ASKPASS` can live within the GitHub Desktop codebase instead of having
 multiple trampoline executables.
-
-## SSH Wrapper
-
-Along with the trampoline, an SSH wrapper is provided for macOS. The reason for
-this is macOS before Monterey include an "old" version of OpenSSH that will
-ignore the `SSH_ASKPASS` variable unless it's unable to write to a tty.
-
-This SSH wrapper achieves exactly that: just runs whatever `ssh` exists in the
-path in a way that will use `SSH_ASKPASS` when necessary.
-
-More recent versions of OpenSSH (starting with 8.3) don't require this wrapper,
-since they added support for a new `SSH_ASKPASS_REQUIRE` environment variable.

binding.gyp

@@ -2,16 +2,12 @@
     'targets': [
       {
         'target_name': 'desktop-trampoline',
-        'defines': [
-          "NAPI_VERSION=<(napi_build_version)",
-        ],
         'type': 'executable',
         'sources': [
           'src/desktop-trampoline.c',
           'src/socket.c'
         ],
         'include_dirs': [
-          '<!(node -p "require(\'node-addon-api\').include_dir")',
           'include'
         ],
         'xcode_settings': {
@@ -31,17 +27,12 @@
           '-pie',
           '-D_FORTIFY_SOURCE=1',
           '-fstack-protector-strong',
-          '-Werror=format-security',
+          '-Werror=format-security'
-          '-fno-exceptions'
         ],
-        'cflags_cc!': [ '-fno-exceptions' ],
         'ldflags!': [
           '-z relro',
           '-z now'
         ],
-        'msvs_settings': {
-          'VCCLCompilerTool': { 'ExceptionHandling': 1 },
-        },
         'conditions': [
           ['OS=="win"', {
             'defines': [ 'WINDOWS' ],
@@ -51,53 +42,5 @@
           }]
         ]
       },
-      {
-        'target_name': 'ssh-wrapper',
-        'defines': [
-          "NAPI_VERSION=<(napi_build_version)",
-        ],
-        'type': 'executable',
-        'sources': [
-          'src/ssh-wrapper.c'
-        ],
-        'include_dirs': [
-          '<!(node -p "require(\'node-addon-api\').include_dir")',
-          'include'
-        ],
-        'xcode_settings': {
-          'OTHER_CFLAGS': [
-            '-Wall',
-            '-Werror',
-            '-Werror=format-security',
-            '-fPIC',
-            '-D_FORTIFY_SOURCE=1',
-            '-fstack-protector-strong'
-          ]
-        },
-        'cflags!': [
-          '-Wall',
-          '-Werror',
-          '-fPIC',
-          '-pie',
-          '-D_FORTIFY_SOURCE=1',
-          '-fstack-protector-strong',
-          '-Werror=format-security',
-          '-fno-exceptions'
-        ],
-        'cflags_cc!': [ '-fno-exceptions' ],
-        'ldflags!': [
-          '-z relro',
-          '-z now'
-        ],
-        'msvs_settings': {
-          'VCCLCompilerTool': { 'ExceptionHandling': 1 },
-        },
-        'conditions': [
-          # For now only build it for macOS, since it's not needed on Windows
-          ['OS=="win"', {
-            'defines': [ 'WINDOWS' ],
-          }]
-        ]
-      },
     ],
   }

index.d.ts

@@ -1,5 +1,2 @@
 export function getDesktopTrampolinePath(): string
 export function getDesktopTrampolineFilename(): string
-
-export function getSSHWrapperPath(): string
-export function getSSHWrapperFilename(): string

index.js

@@ -15,17 +15,7 @@ function getDesktopTrampolineFilename() {
     : 'desktop-trampoline'
 }
 
-function getSSHWrapperPath() {
-  return Path.join(__dirname, 'build', 'Release', getSSHWrapperFilename())
-}
-
-function getSSHWrapperFilename() {
-  return process.platform === 'win32' ? 'ssh-wrapper.exe' : 'ssh-wrapper'
-}
-
 module.exports = {
   getDesktopTrampolinePath,
   getDesktopTrampolineFilename,
-  getSSHWrapperPath,
-  getSSHWrapperFilename,
 }

package.json

@@ -1,6 +1,6 @@
 {
   "name": "desktop-trampoline",
-  "version": "0.9.8",
+  "version": "0.9.4",
   "main": "index.js",
   "keywords": [],
   "author": "",
@@ -15,10 +15,10 @@
     "test": "jest",
     "lint": "prettier -c **/*.js **/*.md",
     "lint:fix": "prettier --write **/*.js **/*.md",
-    "prebuild-napi-x64": "prebuild -t 3 -r napi -a x64 --strip --include-regex \"(desktop-trampoline|ssh-wrapper)(\\.exe)?$\"",
+    "prebuild-node": "prebuild -t 10.11.0 -t 11.9.0 -t 12.0.0 -t 14.8.0 --strip --include-regex \"desktop-trampoline(\\.exe)?$\"",
-    "prebuild-napi-ia32": "prebuild -t 3 -r napi -a ia32 --strip --include-regex \"(desktop-trampoline|ssh-wrapper)(\\.exe)?$\"",
+    "prebuild-electron": "prebuild -t 7.0.0 -t 8.0.0 -t 9.0.0 -t 10.0.0 -t 11.0.0 -r electron --strip --include-regex \"desktop-trampoline(\\.exe)?$\"",
-    "prebuild-napi-arm64": "prebuild -t 3 -r napi -a arm64 --strip --include-regex \"(desktop-trampoline|ssh-wrapper)(\\.exe)?$\"",
+    "prebuild-electron-arm64": "prebuild -t 7.0.0 -t 8.0.0 -t 9.0.0 -t 10.0.0 -t 11.0.0 -r electron -a arm64 --strip --include-regex \"desktop-trampoline(\\.exe)?$\"",
-    "prebuild-all": "yarn prebuild-napi-x64 && yarn prebuild-napi-ia32 && yarn prebuild-napi-arm64",
+    "prebuild-all": "yarn prebuild-node && yarn prebuild-electron && yarn prebuild-electron-arm64",
     "upload": "node ./script/upload.js"
   },
   "repository": {
@@ -29,24 +29,11 @@
     "url": "https://github.com/desktop/desktop-trampoline/issues"
   },
   "homepage": "https://github.com/desktop/desktop-trampoline#readme",
-  "dependencies": {
-    "node-addon-api": "^4.3.0",
-    "prebuild-install": "^7.0.1"
-  },
   "devDependencies": {
-    "jest": "^27.5.0",
+    "jest": "^26.4.2",
-    "node-gyp": "^8.4.1",
+    "node-gyp": "^7.1.0",
-    "prebuild": "^11.0.3",
+    "prebuild": "^10.0.1",
-    "prettier": "^2.5.1",
+    "prettier": "^2.1.2",
-    "split2": "^4.1.0"
+    "split2": "^3.2.2"
-  },
-  "binary": {
-    "napi_versions": [
-      3
-    ]
-  },
-  "config": {
-    "runtime": "napi",
-    "target": 3
   }
 }

script/download-node-lib-win-arm64.ps1

@@ -1,36 +0,0 @@
-# This script can be removed as soon as official Windows arm64 builds are published:
-# https://github.com/nodejs/build/issues/2450#issuecomment-705853342
-
-$nodeVersion = $args[0]
-$fallbackVersion = $args[1]
-
-If ($null -eq $nodeVersion -Or $null -eq $fallbackVersion) {
-  Write-Error "No NodeJS version given as argument to this file. Run it like download-nodejs-win-arm64.ps1 NODE_VERSION NODE_FALLBACK_VERSION"
-  exit 1
-}
-
-$url = "https://unofficial-builds.nodejs.org/download/release/v$nodeVersion/win-arm64/node.lib"
-$fallbackUrl = "https://unofficial-builds.nodejs.org/download/release/v$fallbackVersion/win-arm64/node.lib"
-
-# Always write to the $nodeVersion cache folder, even if we're using the fallbackVersion
-$cacheFolder = "$env:TEMP\prebuild\napi\$nodeVersion\arm64"
-
-If (!(Test-Path $cacheFolder)) {
-  New-Item -ItemType Directory -Force -Path $cacheFolder
-}
-
-$output = "$cacheFolder\node.lib"
-$start_time = Get-Date
-
-Try {
-  Invoke-WebRequest -Uri $url -OutFile $output
-  $downloadedNodeVersion = $nodeVersion
-} Catch {
-  If ($_.Exception.Response -And $_.Exception.Response.StatusCode -eq "NotFound") {
-    Write-Output "No arm64 node.lib found for Node Windows $nodeVersion, trying fallback version $fallbackVersion..."
-    Invoke-WebRequest -Uri $fallbackUrl -OutFile $output
-    $downloadedNodeVersion = $fallbackVersion
-  }
-}
-
-Write-Output "Downloaded arm64 NodeJS lib v$downloadedNodeVersion to $output in $((Get-Date).Subtract($start_time).Seconds) second(s)"

src/desktop-trampoline.c

@@ -1,5 +1,7 @@
 #include <errno.h>
+#include <fcntl.h>
 #include <stdarg.h>
+#include <stdint.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -44,6 +46,42 @@ int isValidEnvVar(char *env) {
   return 0;
 }
 
+/**
+ * Reads a string from the socket, reading first 2 bytes to get its length and
+ * then the string itself.
+ */
+ssize_t readDelimitedString(SOCKET socket, char *buffer, size_t bufferSize) {
+  uint16_t outputLength = 0;
+  if (readSocket(socket, &outputLength, sizeof(uint16_t)) < (int)sizeof(uint16_t)) {
+      printSocketError("ERROR: Error reading from socket");
+      return -1;
+  }
+
+  if (outputLength > bufferSize) {
+    fprintf(stderr, "ERROR: received string is bigger than buffer (%d > %zu)", outputLength, bufferSize);
+    return -1;
+  }
+
+  size_t totalBytesRead = 0;
+  ssize_t bytesRead = 0;
+
+  // Read output from server
+  do {
+    bytesRead = readSocket(socket, buffer + totalBytesRead, outputLength - totalBytesRead);
+
+    if (bytesRead == -1) {
+      printSocketError("ERROR: Error reading from socket");
+      return -1;
+    }
+
+    totalBytesRead += bytesRead;
+  } while (bytesRead > 0);
+
+  buffer[totalBytesRead] = '\0';
+
+  return totalBytesRead;
+}
+
 int runTrampolineClient(SOCKET *outSocket, int argc, char **argv, char **envp) {
   char *desktopPortString;
 
@@ -102,29 +140,57 @@ int runTrampolineClient(SOCKET *outSocket, int argc, char **argv, char **envp) {
     WRITE_STRING_OR_EXIT("environment variable", validEnvVars[idx]);
   }
 
-  // TODO: send stdin stuff?
-
   char buffer[BUFFER_LENGTH + 1];
-  size_t totalBytesRead = 0;
+  size_t totalBytesWritten = 0;
-  ssize_t bytesRead = 0;
+  ssize_t bytesToWrite = 0;
 
-  // Read output from server
+  // Make stdin reading non-blocking, to prevent getting stuck when no data is
+  // provided via stdin.
+  int flags = fcntl(STDIN_FILENO, F_GETFL, 0);
+  fcntl(STDIN_FILENO, F_SETFL, flags | O_NONBLOCK);
+
+  // Send stdin data
   do {
-    bytesRead = readSocket(socket, buffer + totalBytesRead, BUFFER_LENGTH - totalBytesRead);
+    bytesToWrite = read(0, buffer, BUFFER_LENGTH);
 
-    if (bytesRead == -1) {
+    if (bytesToWrite == -1) {
-      printSocketError("ERROR: Error reading from socket");
+      if (totalBytesWritten == 0) {
+        // No stdin content found, continuing...
+        break;
+      } else {
+        fprintf(stderr, "ERROR: Error reading stdin data");
+        return 1;
+      }
+    }
+
+    if (writeSocket(socket, buffer, bytesToWrite) != 0) {
+      printSocketError("ERROR: Couldn't send stdin data");
       return 1;
     }
 
-    totalBytesRead += bytesRead;
+    totalBytesWritten += bytesToWrite;
-  } while (bytesRead > 0);
+  } while (bytesToWrite > 0);
 
-  buffer[totalBytesRead] = '\0';
+  writeSocket(socket, "\0", 1);
+
+  // Read stdout from the server
+  if (readDelimitedString(socket, buffer, BUFFER_LENGTH) == -1) {
+    fprintf(stderr, "ERROR: Couldn't read stdout from socket");
+    return 1;
+  }
 
   // Write that output to stdout
   fprintf(stdout, "%s", buffer);
 
+  // Read stderr from the server
+  if (readDelimitedString(socket, buffer, BUFFER_LENGTH) == -1) {
+    fprintf(stderr, "ERROR: Couldn't read stdout from socket");
+    return 1;
+  }
+
+  // Write that output to stderr
+  fprintf(stderr, "%s", buffer);
+
   return 0;
 }
 

src/ssh-wrapper.c

@@ -1,37 +0,0 @@
-#ifdef WINDOWS
-
-int main(int argc, char **argv) {
-  // Not needed on Windows, this will just create a dummy executable
-  return -1;
-}
-
-#else
-
-#include <unistd.h>
-#include <stdio.h>
-
-/**
- * This is a wrapper for the ssh command. It is used to make sure ssh runs without
- * a tty on macOS, allowing GitHub Desktop to intercept different prompts from
- * ssh (e.g. passphrase, adding a host to the list of known hosts...).
- * This is not necessary on more recent versions of OpenSSH (starting with v8.3)
- * which include support for the SSH_ASKPASS_REQUIRE environment variable.
- */
-int main(int argc, char **argv) {
-  pid_t child = fork();
-
-  if (child < 0) {
-    fprintf(stderr, "Failed to fork\n");
-    return -1;
-  }
-
-  if (child != 0) {
-    // This is the parent process. Just exit.
-    return 0;
-  }
-
-  setsid();
-  return execvp("ssh", argv);
-}
-
-#endif

test/desktop-trampoline.test.js

@@ -1,66 +0,0 @@
-const { stat, access } = require('fs').promises
-const { constants } = require('fs')
-const { execFile } = require('child_process')
-const { promisify } = require('util')
-const { getDesktopTrampolinePath } = require('../index')
-const split2 = require('split2')
-const { createServer } = require('net')
-
-const trampolinePath = getDesktopTrampolinePath()
-const run = promisify(execFile)
-
-describe('desktop-trampoline', () => {
-  it('exists and is a regular file', async () =>
-    expect((await stat(trampolinePath)).isFile()).toBe(true))
-
-  it('can be executed by current process', () =>
-    access(trampolinePath, constants.X_OK))
-
-  it('fails when required environment variables are missing', () =>
-    expect(run(trampolinePath, ['Username'])).rejects.toThrow())
-
-  it('forwards arguments and valid environment variables correctly', async () => {
-    const output = []
-    const server = createServer(socket => {
-      socket.pipe(split2(/\0/)).on('data', data => {
-        output.push(data.toString('utf8'))
-      })
-
-      // Don't send anything and just close the socket after the trampoline is
-      // done forwarding data.
-      socket.end()
-    })
-    server.unref()
-
-    const startTrampolineServer = async () => {
-      return new Promise((resolve, reject) => {
-        server.on('error', e => reject(e))
-        server.listen(0, '127.0.0.1', () => {
-          resolve(server.address().port)
-        })
-      })
-    }
-
-    const port = await startTrampolineServer()
-    const env = {
-      DESKTOP_TRAMPOLINE_IDENTIFIER: '123456',
-      DESKTOP_PORT: port,
-      DESKTOP_USERNAME: 'sergiou87',
-      DESKTOP_USERNAME_FAKE: 'fake-user',
-      INVALID_VARIABLE: 'foo bar',
-    }
-    const opts = { env }
-
-    await run(trampolinePath, ['baz'], opts)
-
-    const outputArguments = output.slice(1, 2)
-    expect(outputArguments).toStrictEqual(['baz'])
-    // output[2] is the number of env variables
-    const outputEnv = output.slice(3)
-    expect(outputEnv).toHaveLength(2)
-    expect(outputEnv).toContain('DESKTOP_TRAMPOLINE_IDENTIFIER=123456')
-    expect(outputEnv).toContain(`DESKTOP_USERNAME=sergiou87`)
-
-    server.close()
-  })
-})

test/index.test.js

@@ -0,0 +1,183 @@
+const { stat, access } = require('fs').promises
+const { constants } = require('fs')
+const { execFile } = require('child_process')
+const { promisify } = require('util')
+const { getDesktopTrampolinePath } = require('../index')
+const split2 = require('split2')
+const { createServer } = require('net')
+
+const trampolinePath = getDesktopTrampolinePath()
+const run = promisify(execFile)
+
+async function startTrampolineServer(output, stdout = '', stderr = '') {
+  const server = createServer(socket => {
+    socket.pipe(split2(/\0/)).on('data', data => {
+      output.push(data.toString('utf8'))
+    })
+
+    const buffer = Buffer.alloc(2, 0)
+
+    // Send stdout
+    buffer.writeUInt16LE(stdout.length, 0)
+    socket.write(buffer)
+    socket.write(stdout)
+
+    // Send stderr
+    buffer.writeUInt16LE(stderr.length, 0)
+    socket.write(buffer)
+    socket.write(stderr)
+
+    // Close the socket
+    socket.end()
+  })
+  server.unref()
+
+  const startServer = async () => {
+    return new Promise((resolve, reject) => {
+      server.on('error', e => reject(e))
+      server.listen(0, '127.0.0.1', () => {
+        resolve(server.address().port)
+      })
+    })
+  }
+
+  return {
+    server,
+    port: await startServer(),
+  }
+}
+
+describe('desktop-trampoline', () => {
+  it('exists and is a regular file', async () =>
+    expect((await stat(trampolinePath)).isFile()).toBe(true))
+
+  it('can be executed by current process', () =>
+    access(trampolinePath, constants.X_OK))
+
+  it('fails when required environment variables are missing', () =>
+    expect(run(trampolinePath, ['Username'])).rejects.toThrow())
+
+  describe('with a trampoline server', () => {
+    let server = null
+    let output = []
+    let baseEnv = {}
+
+    async function configureTrampolineServer(stdout = '', stderr = '') {
+      output = []
+      const serverInfo = await startTrampolineServer(output, stdout, stderr)
+      server = serverInfo.server
+      baseEnv = {
+        DESKTOP_PORT: serverInfo.port,
+      }
+    }
+
+    afterEach(() => {
+      server.close()
+    })
+
+    it('forwards arguments and valid environment variables correctly without stdin', async () => {
+      await configureTrampolineServer()
+
+      const env = {
+        ...baseEnv,
+        DESKTOP_TRAMPOLINE_IDENTIFIER: '123456',
+        DESKTOP_USERNAME: 'sergiou87',
+        DESKTOP_USERNAME_FAKE: 'fake-user',
+        INVALID_VARIABLE: 'foo bar',
+      }
+      const opts = { env }
+
+      await run(trampolinePath, ['baz'], opts)
+
+      const outputArguments = output.slice(1, 2)
+      expect(outputArguments).toStrictEqual(['baz'])
+      // output[2] is the number of env variables
+      const outputEnv = output.slice(3, output.length - 1)
+      expect(outputEnv).toHaveLength(2)
+      expect(outputEnv).toContain('DESKTOP_TRAMPOLINE_IDENTIFIER=123456')
+      expect(outputEnv).toContain(`DESKTOP_USERNAME=sergiou87`)
+
+      expect(output[output.length - 1]).toStrictEqual('')
+    })
+
+    it('forwards arguments, environment variables and stdin correctly', async () => {
+      await configureTrampolineServer()
+
+      const env = {
+        ...baseEnv,
+        DESKTOP_TRAMPOLINE_IDENTIFIER: '123456',
+        DESKTOP_USERNAME: 'sergiou87',
+      }
+      const opts = {
+        env,
+        stdin: 'This is a test\nWith a multiline\nStandard input text',
+      }
+
+      const run = new Promise((resolve, reject) => {
+        const process = execFile(trampolinePath, ['baz'], opts, function (
+          err,
+          stdout,
+          stderr
+        ) {
+          if (!err) {
+            resolve({ stdout, stderr, exitCode: 0 })
+            return
+          }
+
+          reject(err)
+        })
+
+        process.stdin.end(
+          'This is a test\nWith a multiline\nStandard input text',
+          'utf-8'
+        )
+      })
+      await run
+
+      const outputArguments = output.slice(1, 2)
+      expect(outputArguments).toStrictEqual(['baz'])
+      // output[2] is the number of env variables
+      const outputEnv = output.slice(3, output.length - 1)
+      expect(outputEnv).toHaveLength(2)
+      expect(outputEnv).toContain('DESKTOP_TRAMPOLINE_IDENTIFIER=123456')
+      expect(outputEnv).toContain(`DESKTOP_USERNAME=sergiou87`)
+
+      expect(output[output.length - 1]).toBe(
+        'This is a test\nWith a multiline\nStandard input text'
+      )
+    })
+
+    it('outputs the same stdout received from the server, when no stderr is specified', async () => {
+      await configureTrampolineServer('This is the command stdout', '')
+
+      const opts = { env: baseEnv }
+      const result = await run(trampolinePath, ['baz'], opts)
+
+      expect(result.stdout).toStrictEqual('This is the command stdout')
+      expect(result.stderr).toStrictEqual('')
+    })
+
+    it('outputs the same stderr received from the server, when no stdout is specified', async () => {
+      await configureTrampolineServer('', 'This is the command stderr')
+
+      const opts = { env: baseEnv }
+      const result = await run(trampolinePath, ['baz'], opts)
+
+      expect(result.stdout).toStrictEqual('')
+      expect(result.stderr).toStrictEqual('This is the command stderr')
+    })
+
+    it('outputs the same stdout and stderr received from the server, when both are specified', async () => {
+      await configureTrampolineServer(
+        'This is the command stdout',
+        'This is the command stderr'
+      )
+
+      const opts = { env: baseEnv }
+      const result = await run(trampolinePath, ['baz'], opts)
+
+      expect(result.stdout).toStrictEqual('This is the command stdout')
+      expect(result.stderr).toStrictEqual('This is the command stderr')
+    })
+  })
+})

test/ssh-wrapper.test.js

@@ -1,42 +0,0 @@
-const { stat, access } = require('fs').promises
-const { constants } = require('fs')
-const { execFile } = require('child_process')
-const { promisify } = require('util')
-const { getSSHWrapperPath } = require('../index')
-
-const sshWrapperPath = getSSHWrapperPath()
-const run = promisify(execFile)
-
-describe('ssh-wrapper', () => {
-  it('exists and is a regular file', async () =>
-    expect((await stat(sshWrapperPath)).isFile()).toBe(true))
-
-  // On Windows, the binary generated is just useless, so no point to test it.
-  // Also, this won't be used on Linux (for now at least), so don't bother to
-  // run the tests there.
-  if (process.platform !== 'darwin') {
-    return
-  }
-
-  it('can be executed by current process', () =>
-    access(sshWrapperPath, constants.X_OK))
-
-  it('attempts to use ssh-askpass program', async () => {
-    // Try to connect to github.com with a non-existent known_hosts file to force
-    // ssh to prompt the user and use askpass.
-    const result = await run(
-      sshWrapperPath,
-      ['-o', 'UserKnownHostsFile=/path/to/fake/known_hosts', 'git@github.com'],
-      {
-        env: {
-          SSH_ASKPASS: '/path/to/fake/ssh-askpass',
-          DISPLAY: '.',
-        },
-      }
-    )
-
-    expect(result.stderr).toMatch(
-      /ssh_askpass: exec\(\/path\/to\/fake\/ssh-askpass\): No such file or directory/
-    )
-  })
-})