1#!/usr/bin/env python 2#===----------------------------------------------------------------------===## 3# 4# Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 5# See https://llvm.org/LICENSE.txt for license information. 6# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 7# 8#===----------------------------------------------------------------------===## 9 10""" 11Runs an executable on a remote host. 12 13This is meant to be used as an executor when running the C++ Standard Library 14conformance test suite. 15""" 16 17import argparse 18import os 19import posixpath 20import shlex 21import subprocess 22import sys 23import tarfile 24import tempfile 25 26def ssh(args, command): 27 cmd = ['ssh', '-oBatchMode=yes'] 28 if args.extra_ssh_args is not None: 29 cmd.extend(shlex.split(args.extra_ssh_args)) 30 return cmd + [args.host, command] 31 32 33def scp(args, src, dst): 34 cmd = ['scp', '-q', '-oBatchMode=yes'] 35 if args.extra_scp_args is not None: 36 cmd.extend(shlex.split(args.extra_scp_args)) 37 return cmd + [src, '{}:{}'.format(args.host, dst)] 38 39 40def main(): 41 parser = argparse.ArgumentParser() 42 parser.add_argument('--host', type=str, required=True) 43 parser.add_argument('--execdir', type=str, required=True) 44 parser.add_argument('--tempdir', type=str, required=False, default='/tmp') 45 parser.add_argument('--extra-ssh-args', type=str, required=False) 46 parser.add_argument('--extra-scp-args', type=str, required=False) 47 parser.add_argument('--codesign_identity', type=str, required=False, default=None) 48 parser.add_argument('--env', type=str, nargs='*', required=False, default=dict()) 49 parser.add_argument("command", nargs=argparse.ONE_OR_MORE) 50 args = parser.parse_args() 51 commandLine = args.command 52 53 # Create a temporary directory where the test will be run. 54 # That is effectively the value of %T on the remote host. 55 tmp = subprocess.check_output(ssh(args, 'mktemp -d {}/libcxx.XXXXXXXXXX'.format(args.tempdir)), universal_newlines=True).strip() 56 57 # HACK: 58 # If an argument is a file that ends in `.tmp.exe`, assume it is the name 59 # of an executable generated by a test file. We call these test-executables 60 # below. This allows us to do custom processing like codesigning test-executables 61 # and changing their path when running on the remote host. It's also possible 62 # for there to be no such executable, for example in the case of a .sh.cpp 63 # test. 64 isTestExe = lambda exe: exe.endswith('.tmp.exe') and os.path.exists(exe) 65 pathOnRemote = lambda file: posixpath.join(tmp, os.path.basename(file)) 66 67 try: 68 # Do any necessary codesigning of test-executables found in the command line. 69 if args.codesign_identity: 70 for exe in filter(isTestExe, commandLine): 71 subprocess.check_call(['xcrun', 'codesign', '-f', '-s', args.codesign_identity, exe], env={}) 72 73 # tar up the execution directory (which contains everything that's needed 74 # to run the test), and copy the tarball over to the remote host. 75 try: 76 tmpTar = tempfile.NamedTemporaryFile(suffix='.tar', delete=False) 77 with tarfile.open(fileobj=tmpTar, mode='w') as tarball: 78 tarball.add(args.execdir, arcname=os.path.basename(args.execdir)) 79 80 # Make sure we close the file before we scp it, because accessing 81 # the temporary file while still open doesn't work on Windows. 82 tmpTar.close() 83 remoteTarball = pathOnRemote(tmpTar.name) 84 subprocess.check_call(scp(args, tmpTar.name, remoteTarball)) 85 finally: 86 # Make sure we close the file in case an exception happens before 87 # we've closed it above -- otherwise close() is idempotent. 88 tmpTar.close() 89 os.remove(tmpTar.name) 90 91 # Untar the dependencies in the temporary directory and remove the tarball. 92 remoteCommands = [ 93 'tar -xf {} -C {} --strip-components 1'.format(remoteTarball, tmp), 94 'rm {}'.format(remoteTarball) 95 ] 96 97 # Make sure all test-executables in the remote command line have 'execute' 98 # permissions on the remote host. The host that compiled the test-executable 99 # might not have a notion of 'executable' permissions. 100 for exe in map(pathOnRemote, filter(isTestExe, commandLine)): 101 remoteCommands.append('chmod +x {}'.format(exe)) 102 103 # Execute the command through SSH in the temporary directory, with the 104 # correct environment. We tweak the command line to run it on the remote 105 # host by transforming the path of test-executables to their path in the 106 # temporary directory on the remote host. 107 commandLine = (pathOnRemote(x) if isTestExe(x) else x for x in commandLine) 108 remoteCommands.append('cd {}'.format(tmp)) 109 if args.env: 110 remoteCommands.append('export {}'.format(' '.join(args.env))) 111 remoteCommands.append(subprocess.list2cmdline(commandLine)) 112 113 # Finally, SSH to the remote host and execute all the commands. 114 rc = subprocess.call(ssh(args, ' && '.join(remoteCommands))) 115 return rc 116 117 finally: 118 # Make sure the temporary directory is removed when we're done. 119 subprocess.check_call(ssh(args, 'rm -r {}'.format(tmp))) 120 121 122if __name__ == '__main__': 123 exit(main()) 124