Xcode打包失败，因Python3执行脚本出错

今天使用Xcode打包失败了。。

屏幕快照 2019-08-16 下午5.02.35.png

点击“Show Logs”查看日志得到以下错误信息：

{

            code = 679;

            description = "ipatool failed with an exception: #<CmdSpec::NonZeroExcitException: /usr/bin/python exited with pid 54505 exit 1\nStdout:\n\nStderr:\n    Traceback (most recent call last):\n      File \"<string>\", line 1, in <module>\n    AttributeError: 'str' object has no attribute 'decode'\n>\n    /Applications/Xcode.app/Contents/Developer/usr/bin/ipatool:227:in `run'\n    /Applications/Xcode.app/Contents/Developer/usr/bin/ipatool:210:in `run'\n    /Applications/Xcode.app/Contents/Developer/usr/bin/ipatool:139:in `unicode_equal?'\n    /Applications/Xcode.app/Contents/Developer/usr/bin/ipatool:1758:in `block in MakeFileSystemNode'\n    /Applications/Xcode.app/Contents/Developer/usr/bin/ipatool:1758:in `each'\n    /Applications/Xcode.app/Contents/Developer/usr/bin/ipatool:1758:in `detect'\n    /Applications/Xcode.app/Contents/Developer/usr/bin/ipatool:1758:in `MakeFileSystemNode'\n    /Applications/Xcode.app/Contents/Developer/usr/bin/ipatool:1461:in `initialize'\n    /Applications/Xcode.app/Contents/Developer/usr/bin/ipatool:2355:in `new'\n    /Applications/Xcode.app/Contents/Developer/usr/bin/ipatool:2355:in `ProcessIPA'\n    /Applications/Xcode.app/Contents/Developer/usr/bin/ipatool:3009:in `<main>'";

            info =             {

            };

            level = ERROR;

            type = exception;

        }

可以看出来，错误信息是在ipatool脚本：

/Applications/Xcode.app/Contents/Developer/usr/bin/ipatool这个python文件中

我们找到这个文件：

屏幕快照 2019-08-16 下午5.12.04.png

然后找到第227行：

屏幕快照 2019-08-16 下午5.13.04.png

确实是NonZeroExcitException错误，接下来找到210行，是调用run这个方法，没什么问题。继续找第139行，137-140行内容为：

# We still support Ruby 2.0, so we need a workaround for unicode equivalence

  def unicode_equal?(other)

    return CmdSpec.new(locate_tool("python"), ["-c", "import sys; import unicodedata; print(unicodedata.normalize('NFC', sys.argv[1].decode('utf-8')) == unicodedata.normalize('NFC', sys.argv[2].decode('utf-8')))", self, other]).run(0, false, true).strip == "True"

  end

我们看到了一个decode函数，这个和报错内容：

AttributeError: 'str' object has no attribute 'decode'

匹配上了。我们修改一下这个Python文件，将decode改为encode之后保存，再运行，继续报错。。

{

            code = 679;

            description = "ipatool failed with an exception: #<CmdSpec::NonZeroExcitException: /usr/bin/python exited with pid 55146 exit 1\nStdout:\n\nStderr:\n    Traceback (most recent call last):\n      File \"<string>\", line 1, in <module>\n    TypeError: normalize() argument 2 must be str, not bytes\n>\n    /Applications/Xcode.app/Contents/Developer/usr/bin/ipatool:227:in `run'\n    /Applications/Xcode.app/Contents/Developer/usr/bin/ipatool:210:in `run'\n    /Applications/Xcode.app/Contents/Developer/usr/bin/ipatool:139:in `unicode_equal?'\n    /Applications/Xcode.app/Contents/Developer/usr/bin/ipatool:1758:in `block in MakeFileSystemNode'\n    /Applications/Xcode.app/Contents/Developer/usr/bin/ipatool:1758:in `each'\n    /Applications/Xcode.app/Contents/Developer/usr/bin/ipatool:1758:in `detect'\n    /Applications/Xcode.app/Contents/Developer/usr/bin/ipatool:1758:in `MakeFileSystemNode'\n    /Applications/Xcode.app/Contents/Developer/usr/bin/ipatool:1461:in `initialize'\n    /Applications/Xcode.app/Contents/Developer/usr/bin/ipatool:2355:in `new'\n    /Applications/Xcode.app/Contents/Developer/usr/bin/ipatool:2355:in `ProcessIPA'\n    /Applications/Xcode.app/Contents/Developer/usr/bin/ipatool:3009:in `<main>'";

            info =             {

            };

            level = ERROR;

            type = exception;

        }

这次的报错是：

TypeError: normalize() argument 2 must be str, not bytes

报错不一样了，是python字符串的问题，将137-140行内容改为：

# We still support Ruby 2.0, so we need a workaround for unicode equivalence

  def unicode_equal?(other)

    return CmdSpec.new(locate_tool("python"), ["-c", "import sys; import unicodedata; print(unicodedata.normalize('NFC', sys.argv[1].encode('unicode_escape').decode('utf-8')) == unicodedata.normalize('NFC', sys.argv[2].encode('unicode_escape').decode('utf-8')))", self, other]).run(0, false, true).strip == "True"

  end

请注意核心改动的地方是：

print(unicodedata.normalize('NFC', sys.argv[1].encode('unicode_escape').decode('utf-8')) == unicodedata.normalize('NFC', sys.argv[2].encode('unicode_escape').decode('utf-8'))

Python2.x版本中字符串默认ASCII编码，有decode方法，decode成Unicode编码；Python3.x版本中默认是Unicode编码，我是先把他转成ASCII编码，然后解码的。

效果：

屏幕快照 2019-08-19 上午10.57.27.png

可以继续正常打包了～
加油～