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(GH-17) Create assembly loader to support dynamic addins
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using System.Reflection; | ||
using Cake.Core.Annotations; | ||
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public abstract class AddinData | ||
{ | ||
protected AddinData(ICakeContext context, string packageName, string packageVersion, string assemblyName = null) | ||
{ | ||
this.Initialize(context, packageName, packageVersion, assemblyName); | ||
} | ||
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public Assembly AddinAssembly { get; private set; } | ||
public IEnumerable<Type> DeclaredEnums { get; private set; } | ||
public IEnumerable<MethodInfo> DefinedAliases { get; private set; } | ||
public IEnumerable<TypeInfo> DefinedClasses { get; private set; } | ||
public IEnumerable<MethodInfo> DefinedMethods { get; private set; } | ||
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protected void Initialize(ICakeContext context, string packageName, string packageVersion, string assemblyName = null) | ||
{ | ||
if (string.IsNullOrEmpty(assemblyName)) | ||
{ | ||
assemblyName = packageName; | ||
} | ||
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var assembly = LoadAddinAssembly(context, packageName, packageVersion, assemblyName); | ||
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if (assembly is null) | ||
{ | ||
return; | ||
} | ||
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AddinAssembly = assembly; | ||
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var declaredEnums = new List<Type>(); | ||
var definedClasses = new List<TypeInfo>(); | ||
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foreach (var ti in assembly.DefinedTypes.Where(ti => ti.IsPublic)) | ||
{ | ||
if (ti.IsEnum) | ||
{ | ||
declaredEnums.Add(ti.AsType()); | ||
EnumerationFound(context, ti.AsType()); | ||
} | ||
else if(ti.IsClass && (!ti.IsAbstract || ti.IsStatic()) && !ti.IsGenericTypeDefinition) | ||
{ | ||
definedClasses.Add(ti); | ||
ClassFound(context, ti); | ||
ParseClass(context, ti); | ||
} | ||
} | ||
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DeclaredEnums = declaredEnums; | ||
DefinedClasses = definedClasses; | ||
} | ||
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protected virtual void AliasFound(ICakeContext context, MethodInfo method) | ||
{ | ||
} | ||
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protected virtual void ClassFound(ICakeContext context, TypeInfo classTypeInfo) | ||
{ | ||
} | ||
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protected void ParseClass(ICakeContext context, TypeInfo classTypeInfo) | ||
{ | ||
var aliases = new List<MethodInfo>(); | ||
var methods = new List<MethodInfo>(); | ||
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foreach (var mi in classTypeInfo.DeclaredMethods.Where(i => i.IsPublic)) | ||
{ | ||
if (mi.GetCustomAttribute<CakeMethodAliasAttribute>() != null) | ||
{ | ||
aliases.Add(mi); | ||
AliasFound(context, mi); | ||
} | ||
else | ||
{ | ||
methods.Add(mi); | ||
MethodFound(context, mi); | ||
} | ||
} | ||
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DefinedAliases = aliases; | ||
DefinedMethods = methods; | ||
} | ||
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protected virtual void EnumerationFound(ICakeContext context, Type enumType) | ||
{ | ||
} | ||
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protected virtual void MethodFound(ICakeContext context, MethodInfo method) | ||
{ | ||
} | ||
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private static Assembly LoadAddinAssembly(ICakeContext context, string packageName, string packageVersion, string assemblyName) | ||
{ | ||
var dllPath = GetAssemblyPath(context, packageName, packageVersion, assemblyName); | ||
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if (dllPath is null) | ||
{ | ||
var script = $"#tool nuget:?package={packageName}&version={packageVersion}&prerelease"; | ||
var tempFile = Guid.NewGuid() + ".cake"; | ||
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System.IO.File.WriteAllText(tempFile, script); | ||
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try | ||
{ | ||
context.CakeExecuteScript(tempFile); | ||
} | ||
finally | ||
{ | ||
if (context.FileExists(tempFile)) | ||
{ | ||
context.DeleteFile(tempFile); | ||
} | ||
} | ||
} | ||
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dllPath = GetAssemblyPath(context, packageName, packageVersion, assemblyName); | ||
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if (dllPath is null) | ||
{ | ||
context.Warning("Unable to find path to the {0} package assembly!", packageName); | ||
return null; | ||
} | ||
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var assembly = Assembly.LoadFrom(dllPath.FullPath); | ||
return assembly; | ||
} | ||
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private static FilePath GetAssemblyPath(ICakeContext context, string packageName, string packageVersion, string assemblyName) | ||
{ | ||
FilePath dllPath = null; | ||
const string pathFormat = "{0}.{1}/**/{2}*/{3}.dll"; | ||
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var possibleFrameworks = new List<String>(); | ||
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if (context.Environment.Runtime.IsCoreClr) | ||
{ | ||
possibleFrameworks.Add("netcoreapp"); | ||
possibleFrameworks.Add("net4"); // TODO: Remove this after debugging | ||
} | ||
else | ||
{ | ||
possibleFrameworks.Add("net4"); | ||
} | ||
possibleFrameworks.Add("netstandard"); | ||
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foreach (var framework in possibleFrameworks) | ||
{ | ||
dllPath = context.Tools.Resolve(string.Format(pathFormat, packageName, packageVersion, framework, assemblyName)); | ||
if (dllPath is null) | ||
dllPath = context.Tools.Resolve(string.Format(pathFormat, packageName, "*", framework, assemblyName)); | ||
if (dllPath is object) | ||
break; | ||
} | ||
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return dllPath; | ||
} | ||
} |
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#load ./AddinData.cake |