Ignore underscore-prefixed files for scss

Author: LordJZ

src/WebCompiler/Compile/SassCompiler.cs

@@ -33,6 +33,12 @@ public CompilerResult Compile(Config config)
                 OriginalContent = content,
             };
 
+            if (config.GlobalMatch)
+            {
+                if (string.IsNullOrWhiteSpace(content) || Path.GetFileName(config.InputFile).StartsWith("_"))
+                    return result;
+            }
+
             try
             {
                 RunCompilerProcess(config, info);

src/WebCompiler/Config/Config.cs

@@ -55,6 +55,8 @@ public class Config
 
         internal string Output { get; set; }
 
+        internal bool GlobalMatch { get; set; }
+
         /// <summary>
         /// Converts the relative input file to an absolute file path.
         /// </summary>
@@ -224,7 +226,12 @@ Config MakeMatchedConfig(string sourceFile)
         internal IEnumerable<Config> Match(string folder)
         {
             return Directory.EnumerateFiles(folder, this.InputFile, SearchOption.AllDirectories)
-                            .Select(MakeMatchedConfig);
+                            .Select(s =>
+                            {
+                                Config config = MakeMatchedConfig(s);
+                                config.GlobalMatch = true;
+                                return config;
+                            });
         }
     }
 }

src/WebCompiler/Config/ConfigFileProcessor.cs

@@ -203,7 +203,7 @@ private CompilerResult ProcessConfig(string baseFolder, Config config)
 
             var result = compiler.Compile(config);
 
-            if (result.Errors.Any(e => !e.IsWarning))
+            if (result.Errors.Any(e => !e.IsWarning) || string.IsNullOrWhiteSpace(result.CompiledContent))
                 return result;
 
             if (Path.GetExtension(config.OutputFile).Equals(".css", StringComparison.OrdinalIgnoreCase) && AdjustRelativePaths(config))