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@xpn xpn/roslyn_renamer.cs Secret
Created Mar 8, 2019

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using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.CodeAnalysis;
using Microsoft.CodeAnalysis.CSharp;
using Microsoft.CodeAnalysis.CSharp.Syntax;
using Microsoft.CodeAnalysis.MSBuild;
using Microsoft.CodeAnalysis.Rename;
namespace Rewriter
{
class Program
{
static void Main(string[] args)
{
Console.WriteLine("Roslyn Renamer example by @_xpn_\n");
Program p = new Program();
if (args.Length != 1)
{
Console.WriteLine("[*] Error: No solution path provided");
return;
}
p.Run(args[0]).Wait();
}
// via SO: https://stackoverflow.com/questions/1344221/how-can-i-generate-random-alphanumeric-strings
public static string RandomString(int length)
{
var random = new Random();
const string chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
return new string(Enumerable.Repeat(chars, length)
.Select(s => s[random.Next(s.Length)]).ToArray());
}
MSBuildWorkspace m_workspace;
public async Task Run(string solutionPath)
{
// Create a workspace to allow loading our solution
m_workspace = MSBuildWorkspace.Create();
// Load our target solution
Solution solution = await m_workspace.OpenSolutionAsync(solutionPath);
// Find all projects in the solution
var projects = solution.Projects;
// Get the first project
var project = projects.FirstOrDefault();
// Enumerate through documents in the project
foreach (var document in project.Documents)
{
// Get our syntax tree representation of the document
var syntaxTree = await document.GetSyntaxTreeAsync();
// Find all classes and pass them to be renamed
var classes = syntaxTree.GetRoot().DescendantNodes().OfType<ClassDeclarationSyntax>();
foreach (var c in classes)
{
solution = await Replace<ClassDeclarationSyntax>(solution, project.Name, document.Name, c.Identifier.ToString(), RandomString(10));
}
// Find all enums and pass them to be renamed
var enums = syntaxTree.GetRoot().DescendantNodes().OfType<EnumDeclarationSyntax>();
foreach (var e in enums)
{
solution = await Replace<EnumDeclarationSyntax>(solution, project.Name, document.Name, e.Identifier.ToString(), RandomString(10));
}
// Find all namespaces and pass them to be renamed
var namespaces = syntaxTree.GetRoot().DescendantNodes().OfType<NamespaceDeclarationSyntax>();
foreach (var n in namespaces)
{
solution = await Replace<NamespaceDeclarationSyntax>(solution, project.Name, document.Name, n.Name.ToString(), RandomString(10));
}
}
// When completed, apply changes to our solution
m_workspace.TryApplyChanges(solution);
}
public async Task<Solution> Replace<T>(Solution solution, string projectName, string documentName, string oldName, string newName)
{
ISymbol symbol;
IEnumerable<T> nodes;
var project = solution.Projects.Where(s => s.Name == projectName).FirstOrDefault();
var document = project.Documents.Where(s => s.Name == documentName).FirstOrDefault();
var semanticModel = await document.GetSemanticModelAsync();
var syntaxTree = await document.GetSyntaxTreeAsync();
// Check if we have a namespace as this has a different property to search for
if (typeof(T) == typeof(NamespaceDeclarationSyntax))
{
nodes = (IEnumerable<T>)syntaxTree.GetRoot().DescendantNodes().OfType<T>();
var node = ((IEnumerable<NamespaceDeclarationSyntax>)nodes).Where(s => s.Name.ToString() == oldName).FirstOrDefault();
if (node == null)
{
return solution;
}
// Get a symbol for our namespace
symbol = semanticModel.GetDeclaredSymbol(node);
}
else
{
nodes = (IEnumerable<T>)syntaxTree.GetRoot().DescendantNodes().OfType<T>();
var node = ((IEnumerable<BaseTypeDeclarationSyntax>)nodes).Where(s => s.Identifier.ToString() == oldName).FirstOrDefault();
if (node == null)
{
return solution;
}
// Get a symbol for our class/enum
symbol = semanticModel.GetDeclaredSymbol(node);
}
// Use Roslyn to rename throughout our solution
solution = await Renamer.RenameSymbolAsync(solution, symbol, newName, solution.Workspace.Options);
return solution;
}
}
}
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