1+ //css_engine csc
2+ //css_include global-usings
3+ using static System . Console ;
4+ using System . Diagnostics ;
5+ using static System . Environment ;
6+ using static System . Reflection . Assembly ;
7+ using System . Text . Json ;
8+ using System . Text . Json . Nodes ;
9+
10+ var arg1 = args . FirstOrDefault ( ) ;
11+
12+ if ( arg1 == "?" || arg1 == "/?" || arg1 == "-?" || arg1 == "-help" )
13+ {
14+ string version = Path . GetFileNameWithoutExtension (
15+ Directory . GetFiles ( Path . GetDirectoryName ( GetEnvironmentVariable ( "EntryScript" ) ) , "*.version" )
16+ . FirstOrDefault ( ) ?? "0.0.0.0.version" ) ;
17+
18+ WriteLine ( $@ "v{ version } ({ Environment . GetEnvironmentVariable ( "EntryScript" ) } )") ;
19+ WriteLine ( $ "Sets the script engine target runtime to one of the available .NET ideployments.") ;
20+ WriteLine ( $ " css -self-rt [-help] ") ;
21+ return ;
22+ }
23+
24+ // ===============================================
25+
26+ Console . WriteLine ( "Available .NET runtimes:" ) ;
27+
28+ var sdk_list = "dotnet" . run ( "--list-runtimes" ) // Microsoft.NETCore.App 9.0.4 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
29+ . Split ( NewLine )
30+ . Where ( line => ! string . IsNullOrWhiteSpace ( line ) )
31+ . Select ( line => line . Split ( ' ' ) . Skip ( 1 ) . FirstOrDefault ( ) ? . Trim ( ) )
32+ . DistinctBy ( line => line )
33+ . OrderBy ( line => new Version ( line . Split ( '-' ) . FirstOrDefault ( ) ) ) // to split by `-` handle pre-releases (e.g. 10.0.0-preview.7.25380.108)
34+ . Select ( ( line , i ) => new { Index = i + 1 , Version = line } )
35+ . ToList ( ) ;
36+
37+ foreach ( var line in sdk_list )
38+ {
39+ WriteLine ( $ "{ line . Index } : { line . Version } ") ;
40+ }
41+
42+ WriteLine ( ) ;
43+ Write ( "Enter the index of the desired target runtime version: " ) ;
44+ var input = ReadLine ( ) ;
45+
46+ if ( int . TryParse ( input , out int index ) )
47+ {
48+ var i = index - 1 ;
49+ if ( i < 0 || i >= sdk_list . Count )
50+ {
51+ WriteLine ( $ "Invalid index: { index } . Please enter a number between 1 and { sdk_list . Count } .") ;
52+ return ;
53+ }
54+
55+ WriteLine ( $ "{ NewLine } "+
56+ $ "Setting target runtime{ NewLine } "+
57+ $ " CLR: { sdk_list [ i ] . Version } { NewLine } "+
58+ $ " Assembly: { GetEntryAssembly ( ) ? . Location } { NewLine } ") ;
59+
60+ var runtimeconfig = Path . ChangeExtension ( GetEntryAssembly ( ) . Location , ".runtimeconfig.json" ) ;
61+
62+ //update the .runtimeconfig.json file
63+ if ( File . Exists ( runtimeconfig ) )
64+ {
65+ var changedConfig = runtimeconfig . UpdateFrameworkVersionTo ( sdk_list [ i ] . Version ) ;
66+
67+ WriteLine ( $ "The assembly's { Path . GetFileName ( runtimeconfig ) } has been updated:") ;
68+ try
69+ {
70+ Console . ForegroundColor = ConsoleColor . Green ;
71+ WriteLine ( changedConfig ) ;
72+ }
73+ finally
74+ {
75+ Console . ResetColor ( ) ;
76+ }
77+ }
78+ else
79+ {
80+ WriteLine ( $ "Runtime configuration file not found: { runtimeconfig } ") ;
81+ }
82+ }
83+ else
84+ WriteLine ( $ "Invalid input: '{ input } '. Please enter a valid number.") ;
85+
86+ //===============================================
87+ static class Extensions
88+ {
89+ public static string UpdateFrameworkVersionTo ( this string file , string version )
90+ {
91+ var ver = version . Split ( '.' ) ; //10.0.100-preview.7.25380.108 or 9.0.304
92+ var tfm = $ "net{ ver [ 0 ] } .{ ver [ 1 ] } ";
93+ var json = JsonSerializer . Deserialize < JsonObject > ( File . ReadAllText ( file ) ) ;
94+ json [ "runtimeOptions" ] [ "tfm" ] = tfm ;
95+ json [ "runtimeOptions" ] [ "framework" ] [ "version" ] = version ;
96+ File . WriteAllText ( file , json . ToJsonString ( new JsonSerializerOptions { WriteIndented = true } ) ) ;
97+
98+ return json [ "runtimeOptions" ] . ToJsonString ( new JsonSerializerOptions { WriteIndented = true } ) ;
99+ }
100+
101+ public static string run ( this string exe , string args , string dir = null )
102+ {
103+ var proc = new Process ( ) ;
104+ proc . StartInfo . FileName = exe ;
105+ proc . StartInfo . Arguments = args ;
106+ proc . StartInfo . WorkingDirectory = dir ;
107+ proc . StartInfo . RedirectStandardOutput = true ;
108+ proc . Start ( ) ;
109+ return proc . StandardOutput . ReadToEnd ( ) ? . Trim ( ) ;
110+ }
111+ }
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