Multiple file managers

[jws305]

I have two separate subsystems in which I use this library to compile Sass. The subsystems are completely disjoint and require different file managers. Since the SassCompiler is now static, how can I support this use case?

[Taritsyn]

Hello, John!

In fact, and earlier the static classes was used for these purposes. You just didn't see it due to the tricky wrapper.

This approach has been criticized, and therefore I had to convert the compiler to a static class and refuse locks.

You can use a wrapper with locks:

using System;

using LibSassHost;

namespace LibSassHost.Wrapper
{
	/// <summary>
	/// Sass-compiler wrapper
	/// </summary>
	public sealed class SassCompilerWrapper
	{
		/// <summary>
		/// Instance of file manager
		/// </summary>
		private readonly IFileManager _fileManager;

		/// <summary>
		/// Synchronizer of compilation
		/// </summary>
		private static readonly object _compilationSynchronizer = new object();


		/// <summary>
		/// Constructs an instance of Sass-compiler wrapper
		/// </summary>
		public SassCompilerWrapper()
			: this(null)
		{ }

		/// <summary>
		/// Constructs an instance of Sass-compiler wrapper
		/// </summary>
		/// <param name="fileManager">File manager</param>
		public SassCompilerWrapper(IFileManager fileManager)
		{
			_fileManager = fileManager;
		}


		/// <summary>
		/// "Compiles" a Sass-code to CSS-code
		/// </summary>
		/// <param name="content">Text content written on Sass</param>
		/// <param name="options">Compilation options</param>
		/// <returns>Compilation result</returns>
		/// <exception cref="ArgumentException"/>
		/// <exception cref="ArgumentNullException" />
		/// <exception cref="SassСompilationException">Sass compilation error.</exception>
		public CompilationResult Compile(string content, CompilationOptions options = null)
		{
			CompilationResult result;

			lock (_compilationSynchronizer)
			{
				SassCompiler.FileManager = _fileManager;

				try
				{
					result = SassCompiler.Compile(content, options);
				}
				finally
				{
					SassCompiler.FileManager = null;
				}
			}

			return result;
		}

		/// <summary>
		/// "Compiles" a Sass-code to CSS-code
		/// </summary>
		/// <param name="content">Text content written on Sass</param>
		/// <param name="indentedSyntax">Flag for whether to enable Sass Indented Syntax
		/// for parsing the data string</param>
		/// <param name="options">Compilation options</param>
		/// <returns>Compilation result</returns>
		/// <exception cref="ArgumentException"/>
		/// <exception cref="ArgumentNullException" />
		/// <exception cref="SassСompilationException">Sass compilation error.</exception>
		public CompilationResult Compile(string content, bool indentedSyntax, CompilationOptions options = null)
		{
			CompilationResult result;

			lock (_compilationSynchronizer)
			{
				SassCompiler.FileManager = _fileManager;

				try
				{
					result = SassCompiler.Compile(content, indentedSyntax, options);
				}
				finally
				{
					SassCompiler.FileManager = null;
				}
			}

			return result;
		}

		/// <summary>
		/// "Compiles" a Sass-code to CSS-code
		/// </summary>
		/// <param name="content">Text content written on Sass</param>
		/// <param name="inputPath">Path to input file</param>
		/// <param name="outputPath">Path to output file</param>
		/// <param name="sourceMapPath">Path to source map file</param>
		/// <param name="options">Compilation options</param>
		/// <returns>Compilation result</returns>
		/// <exception cref="ArgumentException"/>
		/// <exception cref="ArgumentNullException" />
		/// <exception cref="SassСompilationException">Sass compilation error.</exception>
		public CompilationResult Compile(string content, string inputPath, string outputPath = null,
			string sourceMapPath = null, CompilationOptions options = null)
		{
			CompilationResult result;

			lock (_compilationSynchronizer)
			{
				SassCompiler.FileManager = _fileManager;

				try
				{
					result = SassCompiler.Compile(content, inputPath, outputPath, sourceMapPath, options);
				}
				finally
				{
					SassCompiler.FileManager = null;
				}
			}

			return result;
		}

		/// <summary>
		/// "Compiles" a Sass-file to CSS-code
		/// </summary>
		/// <param name="inputPath">Path to input file</param>
		/// <param name="outputPath">Path to output file</param>
		/// <param name="sourceMapPath">Path to source map file</param>
		/// <param name="options">Compilation options</param>
		/// <returns>Compilation result</returns>
		/// <exception cref="ArgumentException"/>
		/// <exception cref="ArgumentNullException" />
		/// <exception cref="SassСompilationException">Sass compilation error.</exception>
		public CompilationResult CompileFile(string inputPath, string outputPath = null,
			string sourceMapPath = null, CompilationOptions options = null)
		{
			CompilationResult result;

			lock (_compilationSynchronizer)
			{
				SassCompiler.FileManager = _fileManager;

				try
				{
					result = SassCompiler.CompileFile(inputPath, outputPath, sourceMapPath, options);
				}
				finally
				{
					SassCompiler.FileManager = null;
				}
			}

			return result;
		}
	}
}

[jws305]

Thanks for the quick response! This worked great.