Mac OS上的Protobuf dart生成未找到protoc-gen-dart

时间：2018-11-28 21:28:09

标签： dart protocol-buffers protoc protoc-gen-dart

我已经用homebrew安装了protoc，并尝试使用proto文件生成dart代码。 当我尝试像protoc --dart_out=. test.proto这样的简单案例时 它给我： protoc-gen-dart: program not found or is not executable --dart_out: protoc-gen-dart: Plugin failed with status code 1. 但是protoc-gen-dart在我的路上...

我还尝试指定类似protoc --dart_out=. --plugin=protoc-gen-dart=~/.pub-cache/bin/protoc-gen-dart ./test.proto的路径，但存在相同的错误...

谁知道我该如何解决？

编辑：

echo | ~/.pub-cache/bin/protoc-gen-dart
Unhandled exception:
InvalidProtocolBufferException: CodedBufferReader encountered a malformed varint.
#0      CodedBufferReader._readRawVarint32 (file:///Users/jaumard/.pub-cache/hosted/pub.dartlang.org/protobuf-0.10.5/lib/src/protobuf/coded_buffer_reader.dart:180:5)
#1      CodedBufferReader.readInt32 (file:///Users/jaumard/.pub-cache/hosted/pub.dartlang.org/protobuf-0.10.5/lib/src/protobuf/coded_buffer_reader.dart:109:22)
#2      CodedBufferReader.readBytes (file:///Users/jaumard/.pub-cache/hosted/pub.dartlang.org/protobuf-0.10.5/lib/src/protobuf/coded_buffer_reader.dart:126:18)
#3      CodedBufferReader.readString (file:///Users/jaumard/.pub-cache/hosted/pub.dartlang.org/protobuf-0.10.5/lib/src/protobuf/coded_buffer_reader.dart:132:39)
#4      _mergeFromCodedBufferReader (file:///Users/jaumard/.pub-cache/hosted/pub.dartlang.org/protobuf-0.10.5/lib/src/protobuf/coded_buffer.dart:158:47)
#5      GeneratedMessage.mergeFromBuffer (file:///Users/jaumard/.pub-cache/hosted/pub.dartlang.org/protobuf-0.10.5/lib/src/protobuf/generated_message.dart:159:5)
#6      new GeneratedMessage.fromBuffer (file:///Users/jaumard/.pub-cache/hosted/pub.dartlang.org/protobuf-0.10.5/lib/src/protobuf/generated_message.dart:31:5)
#7      new CodeGeneratorRequest.fromBuffer (package:protoc_plugin/src/plugin.pb.dart:88:15)
#8      CodeGenerator.generate.<anonymous closure> (file:///Users/jaumard/.pub-cache/hosted/pub.dartlang.org/protoc_plugin-0.10.5/lib/code_generator.dart:66:25)
#9      _RootZone.runUnary (dart:async/zone.dart:1379:54)
#10     _FutureListener.handleValue (dart:async/future_impl.dart:129:18)
#11     Future._propagateToListeners.handleValueCallback (dart:async/future_impl.dart:642:45)
#12     Future._propagateToListeners (dart:async/future_impl.dart:671:32)
#13     Future._complete (dart:async/future_impl.dart:476:7)
#14     Stream.fold.<anonymous closure> (dart:async/stream.dart:726:18)
#15     _RootZone.runGuarded (dart:async/zone.dart:1302:10)
#16     _BufferingStreamSubscription._sendDone.sendDone (dart:async/stream_impl.dart:389:13)
#17     _BufferingStreamSubscription._sendDone (dart:async/stream_impl.dart:399:15)
#18     _BufferingStreamSubscription._close (dart:async/stream_impl.dart:283:7)
#19     _SyncStreamController._sendDone (dart:async/stream_controller.dart:771:19)
#20     _StreamController._closeUnchecked (dart:async/stream_controller.dart:628:7)
#21     _StreamController.close (dart:async/stream_controller.dart:621:5)
#22     _Socket._onData (dart:io/runtime/binsocket_patch.dart:1728:21)
#23     _RootZone.runUnaryGuarded (dart:async/zone.dart:1314:10)
#24     _BufferingStreamSubscription._sendData (dart:async/stream_impl.dart:336:11)
#25     _BufferingStreamSubscription._add (dart:async/stream_impl.dart:263:7)
#26     _SyncStreamController._sendData (dart:async/stream_controller.dart:763:19)
#27     _StreamController._add (dart:async/stream_controller.dart:639:7)
#28     _StreamController.add (dart:async/stream_controller.dart:585:5)
#29     new _RawSocket.<anonymous closure> (dart:io/runtime/binsocket_patch.dart:1290:35)
#30     _NativeSocket.issueReadEvent.issue (dart:io/runtime/binsocket_patch.dart:819:18)
#31     _microtaskLoop (dart:async/schedule_microtask.dart:41:21)
#32     _startMicrotaskLoop (dart:async/schedule_microtask.dart:50:5)
#33     _runPendingImmediateCallback (dart:isolate/runtime/libisolate_patch.dart:115:13)
#34     _RawReceivePortImpl._handleMessage (dart:isolate/runtime/libisolate_patch.dart:172:5)

和dtruss输出：

 sudo dtruss protoc --dart_out=. --plugin=protoc-gen-dart=~/.pub-cache/bin/protoc-gen-dart ./test.proto -I=.
Password:
dtrace: system integrity protection is on, some features will not be available

SYSCALL(args)            = return
~/.pub-cache/bin/protoc-gen-dart: program not found or is not executable
--dart_out: protoc-gen-dart: Plugin failed with status code 1.
open("/dev/dtracehelper\0", 0x2, 0xFFFFFFFFE5D36050)             = 3 0
ioctl(0x3, 0x80086804, 0x7FFEE5D35E60)           = 0 0
close(0x3)               = 0 0
madvise(0x10A24F000, 0x2000, 0x5)                = 0 0
access("/AppleInternal/XBS/.isChrooted\0", 0x0, 0x0)             = -1 Err#2
bsdthread_register(0x7FFF65DE2438, 0x7FFF65DE2428, 0x2000)               = 1073742047 0
sysctlbyname(kern.bootargs, 0xD, 0x7FFEE5D35170, 0x7FFEE5D35168, 0x0)            = 0 0
ioctl(0x2, 0x4004667A, 0x7FFEE5D353F4)           = 0 0
mprotect(0x10A2E4000, 0x1000, 0x0)               = 0 0
mprotect(0x10A2EB000, 0x1000, 0x0)               = 0 0
mprotect(0x10A2EC000, 0x1000, 0x0)               = 0 0
mprotect(0x10A2F3000, 0x1000, 0x0)               = 0 0
mprotect(0x109ED0000, 0x90, 0x1)                 = 0 0
mprotect(0x109ED2000, 0x1000, 0x1)               = 0 0
mprotect(0x109ED0000, 0x90, 0x3)                 = 0 0
mprotect(0x109ED0000, 0x90, 0x1)                 = 0 0
issetugid(0x0, 0x0, 0x0)                 = 0 0
getentropy(0x7FFEE5D34A40, 0x20, 0x0)            = 0 0
getpid(0x0, 0x0, 0x0)            = 29452 0
stat64("/AppleInternal\0", 0x7FFEE5D355E0, 0x0)          = -1 Err#2
csops(0x730C, 0x7, 0x7FFEE5D35110)               = -1 Err#22
proc_info(0x2, 0x730C, 0xD)              = 64 0
csops(0x730C, 0x7, 0x7FFEE5D34960)               = -1 Err#22
access(".\0", 0x0, 0x0)          = 0 0
stat64("/\0", 0x7FFEE5D33EF8, 0x0)               = 0 0
getattrlist("/usr\0", 0x7FFF65CC0954, 0x7FFEE5D35840)            = 0 0
getattrlist("/usr/local\0", 0x7FFF65CC0954, 0x7FFEE5D35840)              = 0 0
getattrlist("/usr/local/bin\0", 0x7FFF65CC0954, 0x7FFEE5D35840)          = 0 0
getattrlist("/usr/local/bin/protoc\0", 0x7FFF65CC0954, 0x7FFEE5D35840)           = 0 0
readlink("/usr/local/bin/protoc\0", 0x7FFEE5D34C40, 0x400)               = 37 0
getattrlist("/usr/local/Cellar\0", 0x7FFF65CC0954, 0x7FFEE5D35840)               = 0 0
getattrlist("/usr/local/Cellar/protobuf\0", 0x7FFF65CC0954, 0x7FFEE5D35840)              = 0 0
getattrlist("/usr/local/Cellar/protobuf/3.6.1.1\0", 0x7FFF65CC0954, 0x7FFEE5D35840)              = 0 0
getattrlist("/usr/local/Cellar/protobuf/3.6.1.1/bin\0", 0x7FFF65CC0954, 0x7FFEE5D35840)          = 0 0
getattrlist("/usr/local/Cellar/protobuf/3.6.1.1/bin/protoc\0", 0x7FFF65CC0954, 0x7FFEE5D35840)           = 0 0
access("/usr/local/Cellar/protobuf/3.6.1.1/bin/google/protobuf/descriptor.proto\0", 0x0, 0x0)            = -1 Err#2
access("/usr/local/Cellar/protobuf/3.6.1.1/bin/include/google/protobuf/descriptor.proto\0", 0x0, 0x0)            = -1 Err#2
access("/usr/local/Cellar/protobuf/3.6.1.1/include/google/protobuf/descriptor.proto\0", 0x0, 0x0)                = 0 0
access("./test.proto\0", 0x0, 0x0)               = 0 0
open("./test.proto\0", 0x0, 0x2)                 = 3 0
close(0x3)               = 0 0
open("test.proto\0", 0x0, 0x2)           = 3 0
dtrace: error on enabled probe ID 2174 (ID 159: syscall::read:return): invalid kernel access in action #12 at DIF offset 68
dtrace: error on enabled probe ID 2174 (ID 159: syscall::read:return): invalid kernel access in action #12 at DIF offset 68
close(0x3)               = 0 0
pipe(0x0, 0x0, 0x0)              = 3 0
pipe(0x0, 0x0, 0x0)              = 5 0
fork()           = 29455 0
close(0x3)               = 0 0
close(0x6)               = 0 0
sigaction(0xD, 0x7FFEE5D34C78, 0x7FFEE5D34CA0)           = 0 0
select(0x6, 0x7FFEE5D35FE0, 0x7FFEE5D35F60, 0x0, 0x0)            = 1 0
dtrace: error on enabled probe ID 2172 (ID 161: syscall::write:return): invalid kernel access in action #12 at DIF offset 68
close(0x4)               = 0 0
select(0x6, 0x7FFEE5D35FE0, 0x7FFEE5D35F60, 0x0, 0x0)            = 1 0
dtrace: error on enabled probe ID 2174 (ID 159: syscall::read:return): invalid kernel access in action #12 at DIF offset 68
close(0x5)               = 0 0
wait4(0x730F, 0x7FFEE5D34DD8, 0x0)               = 29455 0
sigaction(0xD, 0x7FFEE5D34C78, 0x7FFEE5D34CA0)           = 0 0
getrlimit(0x1008, 0x7FFEE5D36160, 0x0)           = 0 0
dtrace: error on enabled probe ID 2173 (ID 947: syscall::write_nocancel:return): invalid kernel access in action #12 at DIF offset 68
dtrace: error on enabled probe ID 2173 (ID 947: syscall::write_nocancel:return): invalid kernel access in action #12 at DIF offset 68
dtrace: error on enabled probe ID 2173 (ID 947: syscall::write_nocancel:return): invalid kernel access in action #12 at DIF offset 68
dtrace: error on enabled probe ID 2173 (ID 947: syscall::write_nocancel:return): invalid kernel access in action #12 at DIF offset 68

1 个答案:

答案 0 :(得分：2)

好吧，看来protoc将参数路径直接传递到execve()，它不会将~字符扩展为原始目录。尝试以下方法：

protoc --dart_out=. --plugin=protoc-gen-dart=$HOME/.pub-cache/bin/protoc-gen-dart ./test.proto

在这种情况下，$HOME在执行protoc之前由外壳扩展，因此它将看到/Users/yourname/.pub-cache/...的完整路径。

下面是调试中使用的一些步骤，它们将来可能会帮助其他人：

您的第二个命令看起来应该可以工作：

protoc --dart_out=. --plugin=protoc-gen-dart=~/.pub-cache/bin/protoc-gen-dart ./test.proto

也许可执行文件有问题。您可以尝试直接执行它：

echo | ~/.pub-cache/bin/protoc-gen-dart

如果它可以正确执行，则您将收到类似于“ google.protobuf.message.DecodeError：截断的消息”的错误消息。因为来自echo的数据不是插件期望的。如果您遇到其他错误，则可能会提示为什么它不可执行。

您也可以尝试使用protoc跟踪dtruss来找出插件执行失败的原因：

sudo dtruss -f protoc ...

当协议尝试启动插件时，需要显示-f标志。底部应该有这样一条线：

execve("~/.pub-cache/bin/protoc-gen-dart", ..) = -1 Err#2

Err#之后的错误号说明了执行失败的原因。就我而言，它是数字2，可以在errno.h文件中查找：

grep 2 /usr/include/sys/errno.h

...
#define ENOENT 2 /* No such file or directory */
...

这是因为我没有安装dart插件。但是在您的情况下，错误可能更令人惊讶。

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