LESS: Fixes source map path issues & refactoring.

EditorExtensions/CodeAnalysis.ruleset

@@ -2,7 +2,6 @@
 <RuleSet Name="Copy of Microsoft All Rules" Description="This rule set contains all rules. Running this rule set may result in a large number of warnings being reported. Use this rule set to get a comprehensive picture of all issues in your code. This can help you decide which of the more focused rule sets are most appropriate to run for your projects." ToolsVersion="12.0">
   <IncludeAll Action="Warning" />
   <Rules AnalyzerId="Microsoft.Analyzers.ManagedCodeAnalysis" RuleNamespace="Microsoft.Rules.Managed">
-    <Rule Id="CA1002" Action="None" />
     <Rule Id="CA1006" Action="None" />
     <Rule Id="CA1020" Action="None" />
     <Rule Id="CA1026" Action="None" />

EditorExtensions/Margin/LessCompiler.cs

@@ -19,15 +19,14 @@ public static class LessCompiler
         private static readonly string node = Path.Combine(webEssentialsNodeDir, @"node.exe");
         private static readonly Regex errorParser = new Regex(@"^(.+) in (.+) on line (\d+), column (\d+):$", RegexOptions.Multiline);
 
-        public static async Task<CompilerResult> Compile(string fileName, string targetFileName = null, string sourceMapRootPath = null)
+        public static async Task<CompilerResult> Compile(string fileName, string targetFileName = null)
         {
             string output = Path.GetTempFileName();
             string arguments = String.Format("--no-color --relative-urls \"{0}\" \"{1}\"", fileName, output);
-            string fileNameWithoutPath = Path.GetFileName(fileName);
-            string sourceMapArguments = (string.IsNullOrEmpty(sourceMapRootPath)) ? "" : String.Format("--source-map-rootpath=\"{0}\" ", sourceMapRootPath.Replace("\\", "/"));
 
             if (WESettings.GetBoolean(WESettings.Keys.LessSourceMaps))
-                arguments = String.Format("--no-color --relative-urls {0}--source-map=\"{1}.map\" \"{2}\" \"{3}\"", sourceMapArguments, fileNameWithoutPath, fileName, output);
+                arguments = String.Format("--no-color --relative-urls --source-map=\"{0}.map\" \"{1}\" \"{2}\"",
+                    targetFileName, fileName, output);
 
             ProcessStartInfo start = new ProcessStartInfo(String.Format("\"{0}\" \"{1}\"", (File.Exists(node)) ? node : "node", lessCompiler))
             {

EditorExtensions/Margin/LessMargin.cs

@@ -1,5 +1,6 @@
 using System;
 using System.Collections.Generic;
+using System.Globalization;
 using System.IO;
 using System.Text;
 using System.Text.RegularExpressions;
@@ -12,6 +13,7 @@ namespace MadsKristensen.EditorExtensions
     public class LessMargin : MarginBase
     {
         public const string MarginName = "LessMargin";
+        private static readonly Regex _sourceMapinCSS = new Regex(@"\/\*#([^*]|[\r\n]|(\*+([^*/]|[\r\n])))*\*\/", RegexOptions.Multiline);
 
         public LessMargin(string contentType, string source, bool showMargin, ITextDocument document)
             : base(source, MarginName, contentType, showMargin, document)
@@ -34,7 +36,7 @@ protected override async void StartCompiler(string source)
 
             Logger.Log("LESS: Compiling " + Path.GetFileName(lessFilePath));
 
-            var result = await LessCompiler.Compile(lessFilePath, cssFilename, Path.GetDirectoryName(lessFilePath));
+            var result = await LessCompiler.Compile(lessFilePath, cssFilename);
 
             if (result.IsSuccess)
             {
@@ -96,37 +98,56 @@ protected override bool CanWriteToDisk(string source)
             return true;// !string.IsNullOrWhiteSpace(stylesheet.Text);
         }
 
-        protected override string UpdateLessSourceMapUrls(string content, string oldFileName, string newFileName)
+        protected override string UpdateLessSourceMapUrls(string content, string sourceFileName, string compiledFileName)
         {
             if (!WESettings.GetBoolean(WESettings.Keys.LessSourceMaps))
                 return content;
-            dynamic jsonSourceMap = null;
-            string sourceMapFilename = oldFileName + ".map";
-            // Read JSON map file and deserialize.
-            string sourceMapContents = File.ReadAllText(sourceMapFilename);
 
-            jsonSourceMap = Json.Decode(sourceMapContents);
+            string sourceMapFilename = compiledFileName + ".map";
 
-            if (jsonSourceMap == null)
+            if (!File.Exists(sourceFileName))
+                return content;
+
+            var updatedFileContent = GetUpdatedSourceMapFileContent(sourceFileName, compiledFileName, sourceMapFilename);
+
+            if (updatedFileContent == null)
                 return content;
 
-            string projectRoot = ProjectHelpers.GetRootFolder(ProjectHelpers.GetActiveProject());
-            string cssNetworkPath = FileHelpers.RelativePath(oldFileName, newFileName);
-            string sourceMapRelativePath = FileHelpers.RelativePath(oldFileName, sourceMapFilename);
+            WriteFile(updatedFileContent, sourceMapFilename, true, false);
+
+            return UpdateSourceLinkInCssComment(content, FileHelpers.RelativePath(sourceMapFilename, sourceFileName));
+        }
+
+        private static string GetUpdatedSourceMapFileContent(string lessFileName, string cssFileName, string sourceMapFilename)
+        {
+            // Read JSON map file and deserialize.
+            dynamic jsonSourceMap = Json.Decode(File.ReadAllText(sourceMapFilename));
+
+            if (jsonSourceMap == null)
+                return null;
 
-            jsonSourceMap.sources = new List<dynamic>(jsonSourceMap.sources);
+            jsonSourceMap.sources = UpdateSourcePaths(new List<dynamic>(jsonSourceMap.sources), cssFileName, lessFileName);
             jsonSourceMap.names = new List<dynamic>(jsonSourceMap.names);
-            jsonSourceMap.file = cssNetworkPath;
+            jsonSourceMap.file = FileHelpers.RelativePath(lessFileName, cssFileName);
 
-            for (int i = 0; i < jsonSourceMap.sources.Count; ++i)
+            return Json.Encode(jsonSourceMap);
+        }
+
+        private static List<dynamic> UpdateSourcePaths(List<dynamic> sources, string cssFileName, string lessFileName)
+        {
+            for (int i = 0; i < sources.Count; ++i)
             {
-                jsonSourceMap.sources[i] = FileHelpers.RelativePath(newFileName, projectRoot + jsonSourceMap.sources[i]);
+                sources[i] = FileHelpers.RelativePath(cssFileName,
+                    File.Exists(sources[i]) ? sources[i] : lessFileName);
             }
 
-            WriteFile(Json.Encode(jsonSourceMap), sourceMapFilename, File.Exists(sourceMapFilename), false);
+            return sources;
+        }
 
-            // Fixed sourceMappingURL comment in CSS file with network accessible path.
-            return Regex.Replace(content, @"\/\*#([^*]|[\r\n]|(\*+([^*/]|[\r\n])))*\*\/", "/*# sourceMappingURL=" + sourceMapRelativePath + "*/");
+        private static string UpdateSourceLinkInCssComment(string content, string sourceMapRelativePath)
+        {   // Fixed sourceMappingURL comment in CSS file with network accessible path.
+            return _sourceMapinCSS.Replace(content,
+                String.Format(CultureInfo.CurrentCulture, "/*# sourceMappingURL={0} */", sourceMapRelativePath));
         }
     }
 }

EditorExtensions/Margin/LessProjectCompiler.cs

@@ -19,18 +19,14 @@ public static void CompileProject(Project project)
 
         private static async Task Compile(Project project)
         {
-            string projectRoot = ProjectHelpers.GetRootFolder(project);
-            var files = Directory.EnumerateFiles(projectRoot, "*.less", SearchOption.AllDirectories).Where(CanCompile);
-            string fileBasePath = string.Empty;
+            var files = Directory.EnumerateFiles(ProjectHelpers.GetRootFolder(project), "*.less", SearchOption.AllDirectories).Where(CanCompile);
 
             if (!files.Any()) return;
 
-            fileBasePath = "/" + Path.GetDirectoryName(FileHelpers.RelativePath(projectRoot, files.First())).Replace("\\", "/");
-
             foreach (string file in files)
             {
                 string cssFileName = MarginBase.GetCompiledFileName(file, ".css", WESettings.GetString(WESettings.Keys.LessCompileToLocation));
-                var result = await LessCompiler.Compile(file, cssFileName, projectRoot + fileBasePath);
+                var result = await LessCompiler.Compile(file, cssFileName);
 
                 if (result.IsSuccess)
                     WriteResult(result, cssFileName);

EditorExtensions/Margin/MarginBase.cs

@@ -254,11 +254,10 @@ protected string WriteCompiledFile(string content, string currentFileName)
                     return string.Empty;
             }
 
-            bool fileExist = File.Exists(fileName);
-            bool fileWritten = false;
-
             ProjectHelpers.CheckOutFileFromSourceControl(fileName);
-            fileWritten = WriteFile(content, fileName, fileExist, fileWritten);
+
+            bool fileExist = File.Exists(fileName);
+            bool fileWritten = WriteFile(content, fileName, fileExist, false);
 
             if (!fileExist && fileWritten)
             {
@@ -268,16 +267,14 @@ protected string WriteCompiledFile(string content, string currentFileName)
             return content;
         }
 
-        protected virtual string UpdateLessSourceMapUrls(string content, string oldFileName, string newFileName)
-        {
-            // If not overridden by derived, return content as is.
+        protected virtual string UpdateLessSourceMapUrls(string content, string sourceFileName, string compiledFileName)
+        {   // If not overridden by derived, return content as is.
             return content;
         }
 
         public static string GetCompiledFileName(string sourceFileName, string compiledExtension, string customFolder)
         {
-            string sourceExtension = Path.GetExtension(sourceFileName);
-            string compiledFileName = Path.GetFileName(sourceFileName).Replace(sourceExtension, compiledExtension);
+            string compiledFileName = Path.GetFileName(Path.ChangeExtension(sourceFileName, compiledExtension));
             string sourceDir = Path.GetDirectoryName(sourceFileName);
             string compiledDir;
             string rootDir = ProjectHelpers.GetRootFolder();

WebEssentialsTests/Tests/LESS/LessCompilationTests.cs

@@ -18,8 +18,7 @@ public class LessCompilationTests
         #region Helper Methods
         private static async Task<string> CompileLess(string fileName, string targetFilename = null)
         {
-            string siteMapPath = "/" + Path.GetDirectoryName(FileHelpers.RelativePath(BaseDirectory, fileName)).Replace("\\", "/");
-            var result = await LessCompiler.Compile(fileName, targetFilename, siteMapPath);
+            var result = await LessCompiler.Compile(fileName, targetFilename);
 
             if (result.IsSuccess)
             {