.NET Core 1.0學習(1)-看看環境

好奇環境是怎樣的，先不看任何東西，本身翻翻看。

• 不想折騰環境，運行一個docker容器就一把搞定了。

docker run -it microsoft/dotnet:latest

• 新建一個工程，流行的風格，嗯，挺上路的嗎。

mkdir hwapp
cd hwapp
dotnet new

看看目錄結構

-rwxr--r-- 1 root root    202 Jun 22 03:31 Program.cs*
-rwxr--r-- 1 root root    348 Jun 22 03:31 project.json*

挑個小刺：每一個文件竟然全設定成了可執行屬性，看着就怪啊。 Program.cs就一個Hellow World沒啥看頭。 project.json:

{
  "version": "1.0.0-*",
  "buildOptions": {
    "debugType": "portable",
    "emitEntryPoint": true
  },
  "dependencies": {},
  "frameworks": {
    "netcoreapp1.0": {
      "dependencies": {
        "Microsoft.NETCore.App": {
          "type": "platform",
          "version": "1.0.0"
        }
      },
      "imports": "dnxcore50"
    }
  }
}

也還好。 dnxcore50的名稱之後可能會換掉。哎，.NET自己的名稱都很差，上樑不正下樑歪。

小刺：最好直接換成yaml，都有點煩了JSON了，那雙引號，什麼破設計，另外也不能寫註釋。因此人家SpringBoot默認都換成yaml了。

• 開始安裝依存lib而後執行了

dotnet restore     #####這個命令嚇人，求你改掉吧。實際是至關於npm install的意思，安裝依賴lib#####
dotnet run

天然是獲得了Hello World。

編譯生成的目錄和Windows下的習慣同樣，bin/Debug,和obj

bin/Debug/netcoreapp1.0/hwapp.dll
bin/Debug/netcoreapp1.0/hwapp.deps.json
bin/Debug/netcoreapp1.0/hwapp.pdb
bin/Debug/netcoreapp1.0/hwapp.runtimeconfig.dev.json
bin/Debug/netcoreapp1.0/hwapp.runtimeconfig.json

• 看看這個dotnet是何方神聖

root@88dab4dc4160:/hwapp# ls -lF `which dotnet`
lrwxrwxrwx 1 root root 24 Jun 30 21:00 /usr/bin/dotnet -> /usr/share/dotnet/dotnet*

乾脆把/usr/share/dotnet/下的東西都翻出來看看

./dotnet
./host/fxr/1.0.1/libhostfxr.so
./sdk/1.0.0-preview2-003121/corehost  #這個顯然是主角luancher了
./sdk/1.0.0-preview2-003121/libhostfxr.so
./sdk/1.0.0-preview2-003121/libhostpolicy.so
./shared/Microsoft.NETCore.App/1.0.0/corehost
./shared/Microsoft.NETCore.App/1.0.0/dotnet
./shared/Microsoft.NETCore.App/1.0.0/libclrjit.so      #JIT Compiler
./shared/Microsoft.NETCore.App/1.0.0/libcoreclr.so     #CLR運行時
./shared/Microsoft.NETCore.App/1.0.0/libcoreclrtraceptprovider.so
./shared/Microsoft.NETCore.App/1.0.0/libdbgshim.so 
./shared/Microsoft.NETCore.App/1.0.0/libhostfxr.so
./shared/Microsoft.NETCore.App/1.0.0/libhostpolicy.so
./shared/Microsoft.NETCore.App/1.0.0/libmscordaccore.so
./shared/Microsoft.NETCore.App/1.0.0/libmscordbi.so
./shared/Microsoft.NETCore.App/1.0.0/libsos.so
./shared/Microsoft.NETCore.App/1.0.0/libsosplugin.so
./shared/Microsoft.NETCore.App/1.0.0/libuv.so    ##竟然你也在。異步編程用的。Node.JS裏用它作event loop的。
./shared/Microsoft.NETCore.App/1.0.0/System.Globalization.Native.so
./shared/Microsoft.NETCore.App/1.0.0/System.IO.Compression.Native.so
./shared/Microsoft.NETCore.App/1.0.0/System.Native.so
./shared/Microsoft.NETCore.App/1.0.0/System.Net.Http.Native.so
./shared/Microsoft.NETCore.App/1.0.0/System.Net.Security.Native.so
./shared/Microsoft.NETCore.App/1.0.0/System.Security.Cryptography.Native.so

這應該就是最核心的乾貨了。

還有其餘好多dll的，和xarmarine裏的那一套比較像

./sdk/1.0.0-preview2-003121/.version
./sdk/1.0.0-preview2-003121/csc.deps.json
./sdk/1.0.0-preview2-003121/csc.dll
./sdk/1.0.0-preview2-003121/csc.runtimeconfig.json
./sdk/1.0.0-preview2-003121/dotnet.deps.json
./sdk/1.0.0-preview2-003121/dotnet.dll
./sdk/1.0.0-preview2-003121/dotnet.runtimeconfig.json
./sdk/1.0.0-preview2-003121/Microsoft.ApplicationInsights.dll
./sdk/1.0.0-preview2-003121/Microsoft.DiaSymReader.dll
./sdk/1.0.0-preview2-003121/Microsoft.DotNet.Archive.dll
...
./sdk/1.0.0-preview2-003121/Microsoft.DotNet.Configurer.dll
...
./sdk/1.0.0-preview2-003121/Microsoft.Extensions.Testing.Abstractions.dll
./sdk/1.0.0-preview2-003121/Newtonsoft.Json.dll
./sdk/1.0.0-preview2-003121/NuGet.Client.dll
./sdk/1.0.0-preview2-003121/NuGet.CommandLine.XPlat.dll
...
./sdk/1.0.0-preview2-003121/NuGet.RuntimeModel.dll
./sdk/1.0.0-preview2-003121/NuGet.Versioning.dll
./sdk/1.0.0-preview2-003121/nuGetPackagesArchive.lzma
./sdk/1.0.0-preview2-003121/runtimes/unix/lib/netstandard1.3/System.Diagnostics.TraceSource.dll
./sdk/1.0.0-preview2-003121/runtimes/win-x64/native/Microsoft.DiaSymReader.Native.amd64.dll
...
./sdk/1.0.0-preview2-003121/runtimes/win8-arm/native/Microsoft.DiaSymReader.Native.arm.dll
./sdk/1.0.0-preview2-003121/System.Diagnostics.TextWriterTraceListener.dll
...
./sdk/1.0.0-preview2-003121/System.Xml.XmlSerializer.dll
./shared/Microsoft.NETCore.App/1.0.0/Microsoft.CodeAnalysis.CSharp.dll
...
./shared/Microsoft.NETCore.App/1.0.0/Microsoft.VisualBasic.dll  #VB.NET難道也要支持，扔了算了。
...
./shared/Microsoft.NETCore.App/1.0.0/Microsoft.Win32.Registry.dll  #Registry??
./shared/Microsoft.NETCore.App/1.0.0/mscorlib.dll
./shared/Microsoft.NETCore.App/1.0.0/mscorlib.ni.dll
./shared/Microsoft.NETCore.App/1.0.0/sosdocsunix.txt
./shared/Microsoft.NETCore.App/1.0.0/System.AppContext.dll
...
./shared/Microsoft.NETCore.App/1.0.0/System.IO.dll  #親切
...
./shared/Microsoft.NETCore.App/1.0.0/System.Native.a  #這是給誰用啊
./shared/Microsoft.NETCore.App/1.0.0/System.Net.Http.dll
...
./shared/Microsoft.NETCore.App/1.0.0/System.Reflection.dll
...
./shared/Microsoft.NETCore.App/1.0.0/System.Runtime.dll
...
./shared/Microsoft.NETCore.App/1.0.0/System.Runtime.InteropServices.dll  #這是什麼節奏， Native調用嗎？
...
./shared/Microsoft.NETCore.App/1.0.0/System.Runtime.Loader.dll
...
./shared/Microsoft.NETCore.App/1.0.0/System.Security.Cryptography.Csp.dll
...
./shared/Microsoft.NETCore.App/1.0.0/System.Security.Cryptography.OpenSsl.dll
...
./shared/Microsoft.NETCore.App/1.0.0/System.Text.RegularExpressions.dll
...
./shared/Microsoft.NETCore.App/1.0.0/System.Xml.ReaderWriter.dll
./shared/Microsoft.NETCore.App/1.0.0/System.Xml.XDocument.dll
...

另外，機器裏面還有一些.nuget管理包用的目錄，總體很乾淨。

繼續吐槽，NuGet這樣的名稱還不趁機改掉啊，難受死了。

回頭再接着分析。

• 看看corehost，和如何debug。 看了corehost的命令行，回到hwap目錄下試着用一下

root@88dab4dc4160:/hwapp# /usr/share/dotnet/shared/Microsoft.NETCore.App/1.0.0/corehost ./bin/Debug/netcoreapp1.0/hwapp.dll
Hello World!

看來就是他了，好了，入口找到了。

再看看詳細信息，下次再分析一下。

root@88dab4dc4160:/hwapp# COREHOST_TRACE=1 /usr/share/dotnet/shared/Microsoft.NETCore.App/1.0.0/corehost ./bin/Debug/netcoreapp1.0/hwapp.dll 2>&1 |less
一堆結果爆屏,不貼了，可以看到用到什麼文件。
...

dotnet和corehost的命令行幫助太少，看不出如何debug，但確定可以調試，只是這些細節看來還沒作完備啊。

下次在看看如何debug。而後在學學ASP.NET Core。