C# 调用NuGet 实现获取包的顶级依赖

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代码：

 1 using System;
 2 using static NuGet.Frameworks.FrameworkConstants;
 3 using static NuGet.Protocol.Core.Types.Repository;
 4 using System.Collections.Generic;
 5 using System.Linq;
 6 using System.Threading;
 7 using System.Threading.Tasks;
 8 using NuGet.Common;
 9 using NuGet.Packaging.Core;
10 using NuGet.Protocol;
11 using NuGet.Protocol.Core.Types;
12 //using NuGet.Test.Utility;
13 using NuGet.Versioning;
14 using NuGet.PackageManagement;
15 namespace NuGet_Remote_develop
16 {
17     internal class Program
18     {
19         static void Main(string[] args)
20         {
21             Console.WriteLine("Hello World!");
22             Console.WriteLine("!!!!");
23             // Set up
24             var packageIdentityA100 = new PackageIdentity("a", NuGetVersion.Parse("1.0.0"));
25             Console.WriteLine("%%%%%");
26             var packageIdentityB100 = new PackageIdentity("b", NuGetVersion.Parse("1.0.0"));
27             var packageIdentityC100 = new PackageIdentity("c", NuGetVersion.Parse("1.0.0"));
28             var packageIdentityC110 = new PackageIdentity("c", NuGetVersion.Parse("1.1.0"));
29             var packageIdentityD100 = new PackageIdentity("d", NuGetVersion.Parse("1.0.0"));
30 
31 
32             var packageDependencyInfos = new List<PackageDependencyInfo>();
33             //制造关于A的依赖图
34             var packageDependencyInfoA = new PackageDependencyInfo(packageIdentityA100,
35                 new PackageDependency[] {
36                     new PackageDependency(packageIdentityB100.Id, VersionRange.Parse(packageIdentityB100.Version.OriginalVersion)),
37                     new PackageDependency(packageIdentityC100.Id, VersionRange.Parse(packageIdentityC100.Version.OriginalVersion)),
38                 });
39             var packageDependencyInfoB = new PackageDependencyInfo(packageIdentityB100,
40                 new PackageDependency[] {
41                     new PackageDependency(packageIdentityD100.Id, VersionRange.Parse(packageIdentityD100.Version.OriginalVersion)),
42                 });
43             var packageDependencyInfoC = new PackageDependencyInfo(packageIdentityC110, Enumerable.Empty<PackageDependency>());
44             var packageDependencyInfoD = new PackageDependencyInfo(packageIdentityD100, Enumerable.Empty<PackageDependency>());
45 
46             //增加所有的依赖关系图
47             packageDependencyInfos.Add(packageDependencyInfoA);
48             packageDependencyInfos.Add(packageDependencyInfoB);
49             packageDependencyInfos.Add(packageDependencyInfoC);
50             packageDependencyInfos.Add(packageDependencyInfoD);
51 
52             // Act————》》获取依赖图
53             var packageWithDependants = PackageGraphAnalysisUtilities.GetPackagesWithDependants(packageDependencyInfos);
54             Console.WriteLine(packageWithDependants);
55             Console.WriteLine("*****");
56             foreach (var package in packageWithDependants)
57             {
58                 switch (package.Identity.Id)
59                 {
60                     case "a":
61                         {
62                             //看他是不是没有其他的依赖项
63                             Console.WriteLine(package.DependantPackages.Count);
64                             Console.WriteLine(package.IsTopLevelPackage);
65                             break;
66                         }
67                     case "b":
68                         {
69                             //看他是不是只有一个依赖项，而且这个依赖项是A。并且他不是直接依赖
70                             Console.WriteLine( package.DependantPackages.Count);
71                             Console.WriteLine(package.DependantPackages.Single().Id);
72                             Console.WriteLine(package.IsTopLevelPackage);
73                             break;
74                         }
75                     case "c":
76                         {
77                             Console.WriteLine(package.DependantPackages.Count);
78                             Console.WriteLine(package.IsTopLevelPackage);
79                             break;
80                         }
81                     case "d":
82                         {
83                             Console.WriteLine( package.DependantPackages.Count);
84                             Console.WriteLine( package.DependantPackages.Single().Id);
85                             Console.WriteLine(package.IsTopLevelPackage);
86                             break;
87                         }
88                     default:
89                         {
90                             Console.WriteLine($"Unexpected package {package.Identity}");
91                             break;
92                         }
93                 }
94             }
95             Console.ReadKey();
96         }
97     }
98 }

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