.NET/Rotor源码研究1补遗 - 解决无法检测操作系统版本的错误

最近不少朋友反映在编译Rotor 的时候出现无法检测操作系统版本的错误，具体现象为执行env.bat 的时候报错：

Could not get platform OS version

 

出现该错误的原因是env.bat 会调用env.core.pl 设置环境，而env.core.pl 在检测操作系统版本的时候会使用到ver 命令的输出结果：

if (Windows()) {                             # The output of ver looks like:                             #                             # Microsoft Windows XP [Version 5.1.2600]                             #                             # (including the empty line before)                               $platform_os_version = `ver`;                             # we keep the first two fields of the version number                             if (! ($platform_os_version =~ s//nMicrosoft.*/[Version +([0-9]+/.[0-9]+)/..*/]/$1/g)) {                                             $platform_os_version = "";                             }                               if ($platform_os_version =~ /^5/..*/) {                                             $platform_os_version = "5.1";                             }             } else {                             $platform_os_version = `uname -r`;                             # we keep all fields of the version number                             if (! ($platform_os_version =~ s/^[^0-9]*([0-9.]+).*$/$1/s)) {                                             $platform_os_version = "";                             }             }                         chomp ($platform_os);             chomp ($platform_os_version);             if (! $platform_os_version ) {                             CorFail ("Could not get platform OS version");             }

 

可以看到env.core.pl使用正则表达式s//nMicrosoft.*/[Version +([0-9]+/.[0-9]+)/..*/]/$1/g来分析Ver的输出结果。如果操作系统为非中文版本或者安装了界面包的情况下，ver命令便有可能输出中文结果，导致脚本出错。虽然可以通过修改系统Locale的方式解决，不过更简单的解决方法显然是直接修改脚本，把$platform_version固定为某个值，比如5.1，修改后代码如下：

if (Windows()) {                             # assume 5.1 version because the original code cannot parse the output of ver command correctly in non-English OS                             $platform_os_version = "5.1";             } else {                             $platform_os_version = `uname -r`;                             # we keep all fields of the version number                             if (! ($platform_os_version =~ s/^[^0-9]*([0-9.]+).*$/$1/s)) {                                             $platform_os_version = "";                             }             }                         chomp ($platform_os);             chomp ($platform_os_version);             if (! $platform_os_version ) {                             CorFail ("Could not get platform OS version");             }

 

这里有一个已经修改好的env.core.pl （放在我的Windows Live Skydrive账户里面），有需要的朋友可以点击下载，然后覆盖SSCLI20目录下的env.core.pl即可。

 

作者:      张羿(ATField)
Blog:      http://blog.youkuaiyun.com/atfield
                http://blogs.msdn.com/yizhang
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