TaskHelper.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / BuildTasks / MS / Internal / Tasks / TaskHelper.cs / 1305600 / TaskHelper.cs
                        

                        
                            //------------------------------------------------------------------------------ 
//
// 
//    Copyright (C) Microsoft Corporation.  All rights reserved.
//  
//
// Description: 
//       TaskHelper implements some common functions for all the WCP tasks 
//       to call.
// 
//  History:
//
//  05/02/05: weibz   Created
// 
//-----------------------------------------------------------------------------
 
using System; 
using System.IO;
using System.Collections; 
using System.Text;
using System.Runtime.InteropServices;

using System.Globalization; 
using System.Diagnostics;
using System.Reflection; 
using System.Resources; 

using Microsoft.Build.Framework; 
using Microsoft.Build.Utilities;

using Microsoft.Build.Tasks;
using MS.Utility; 
using System.Collections.Generic;
 
 
namespace MS.Internal.Tasks
{ 
    //
    // This is required by the unmanaged API GetGacPath.
    // the value indicates the source of the cached assembly.
    // 
    // For our scenario, we just care about GACed assembly.
    // 
    [Flags] 
    internal enum AssemblyCacheFlags
    { 
        ZAP = 1,
        GAC = 2,
        DOWNLOAD = 4,
        ROOT = 8, 
        ROOT_EX = 0x80
    } 
 
    #region BaseTask class
    // 
    // TaskHelper which implements some helper methods.
    //
    internal static class TaskHelper
    { 

        //----------------------------------------------------- 
        // 
        //  Internal Helper Methods
        // 
        //-----------------------------------------------------

        #region Internal Methods
 
        // 
        // Output the Logo information to the logger for a given task 
        // (Console or registered Loggers). 
        // 
        internal static void DisplayLogo(TaskLoggingHelper log, string taskName) 
        {
            string acPath = Assembly.GetExecutingAssembly().Location;
            FileVersionInfo acFileVersionInfo = FileVersionInfo.GetVersionInfo(acPath);
 
            string avalonFileVersion = acFileVersionInfo.FileVersion;
 
            log.LogMessage(MessageImportance.Low,Environment.NewLine); 
            log.LogMessageFromResources(MessageImportance.Low, SRID.TaskLogo, taskName, avalonFileVersion);
            log.LogMessageFromResources(MessageImportance.Low, SRID.TaskRight); 
            log.LogMessage(MessageImportance.Low, Environment.NewLine);
        }

 
        // 
        // Create the full file path with the right root path 
        //  
        // The original file path
        // The root path 
        // The new fullpath
        internal static string CreateFullFilePath(string thePath, string rootPath)
        {
            // make it an absolute path if not already so 
            if ( !Path.IsPathRooted(thePath) )
            { 
                thePath = rootPath + thePath; 
            }
 
            // get rid of '..' and '.' if any
            thePath = Path.GetFullPath(thePath);

            return thePath; 
        }
 
        //  
        // This helper returns the "relative" portion of a path
        // to a given "root" 
        // - both paths need to be rooted
        // - if no match > return empty string
        // E.g.: path1 = C:\foo\bar\
        //       path2 = C:\foo\bar\baz 
        //
        //       return value = "baz" 
        //  
        internal static string GetRootRelativePath(string path1, string path2)
        { 
            string relPath = "";
            string fullpath1;
            string fullpath2;
 
            string sourceDir = Directory.GetCurrentDirectory() + "\\";
 
            // make sure path1 and Path2 are both full path 
            // so that they can be compared on right base.
 
            fullpath1 = CreateFullFilePath (path1, sourceDir);
            fullpath2 = CreateFullFilePath (path2, sourceDir);

            if (fullpath2.StartsWith(fullpath1, StringComparison.OrdinalIgnoreCase)) 
            {
                relPath = fullpath2.Substring (fullpath1.Length); 
            } 

            return relPath; 
        }

        // 
        // Convert a string to a Boolean value using exactly the same rules as 
        // MSBuild uses when it assigns project properties to Boolean CLR properties
        // in a task class. 
        //  
        // The string value to convert
        // true if str is "true", "yes", or "on" (case-insensitive), 
        // otherwise false.
        internal static bool BooleanStringValue(string str)
        {
            bool  isBoolean = false; 

            if (str != null && str.Length > 0) 
            { 
                str = str.ToLower(CultureInfo.InvariantCulture);
 
                if (str.Equals("true") || str.Equals("yes") || str.Equals("on"))
                {
                    isBoolean = true;
                } 
            }
 
            return isBoolean; 
        }
 

        // 
        // return a lower case string
        //  
        // 
        //  
        internal static string GetLowerString(string str) 
        {
            string lowerStr = null; 

            if (str != null && str.Length > 0)
            {
                lowerStr = str.ToLower(CultureInfo.InvariantCulture); 
            }
 
            return lowerStr; 
        }
 
        //
        // Check if the passed string stands for a valid culture name.
        //
        internal static bool IsValidCultureName(string name) 
        {
 
            bool  bValid = true; 

            try 
            {
                //
                // If the passed name is empty or null, we still want
                // to treat it as valid culture name. 
                // It means no satellite assembly will be generated, all the
                // resource images will go to the main assembly. 
                // 
                if (name != null && name.Length > 0)
                { 
                    CultureInfo   cl;

                    cl = new CultureInfo(name);
 
                    // if CultureInfo instance cannot be created for the given name,
                    // treat it as invalid culture name. 
 
                    if (cl == null)
                      bValid = false; 
                }
            }
            catch (ArgumentException)
            { 
                bValid = false;
            } 
 
            return bValid;
        } 

        [DllImport("fusion.dll", CharSet = CharSet.Unicode)]
        internal static extern int GetCachePath(AssemblyCacheFlags cacheFlags, StringBuilder cachePath, ref int pcchPath);
 
        private static List _gacPaths;
        internal static IEnumerable GetGacPaths() 
        { 
            if (_gacPaths != null) return _gacPaths;
 
            List gacPaths = new List();

            AssemblyCacheFlags[] flags = new AssemblyCacheFlags[] {
                AssemblyCacheFlags.ROOT, 
                AssemblyCacheFlags.ROOT_EX
            }; 
 
            foreach (AssemblyCacheFlags flag in flags)
            { 
                int gacPathLength = 0;

                // Request the size of buffer for the path.
                int hresult = GetCachePath(flag, null, ref gacPathLength); 

                // 
                // When gacPathLength is set to 0 and passed to this method, the return value 
                // is an error which indicates INSUFFICIENT_BUFFER, so the code here doesn't
                // check that return value, but just check whether the returned desired buffer 
                // length is valid or not.
                //
                if (gacPathLength > 0)
                { 
                    // Allocate the right size for that buffer.
                    StringBuilder gacPath = new StringBuilder(gacPathLength); 
 
                    // Get the real path string to the buffer.
                    hresult = GetCachePath(flag, gacPath, ref gacPathLength); 

                    if (hresult >= 0)
                    {
                        gacPaths.Add(gacPath.ToString()); 
                    }
                } 
            } 
            if (gacPaths.Count > 0)
            { 
                _gacPaths = gacPaths;
            }
            return _gacPaths;
        } 

 
        // 
        // Detect whether the referenced assembly could be changed during the build procedure.
        // 
        // Current logic:
        //      By default, assume it could be changed during the build.
        //      If knownChangedAssemblies are set, only those assemblies are changeable, all others are not.
        // 
        //      If the assembly is not in the knownChangedAssemblies list,
        //              but it is under GAC or under knownUnchangedReferencePaths, it is not changeable. 
        // 
        internal static bool CouldReferenceAssemblyBeChanged(string assemblyPath, string[] knownUnchangedReferencePaths, string[] knownChangedAssemblies)
        { 
            Debug.Assert(String.IsNullOrEmpty(assemblyPath) == false, "assemblyPath should not be empty.");

            bool bCouldbeChanged = true;
 
            if (String.Compare(Path.GetExtension(assemblyPath), SharedStrings.MetadataDll, StringComparison.OrdinalIgnoreCase) == 0)
            { 
                return false; 
            }
 
            if (knownChangedAssemblies != null && knownChangedAssemblies.Length > 0)
            {
                int length = assemblyPath.Length;
                bool bInKnownChangedList = false; 

                foreach (string changedAsm in knownChangedAssemblies) 
                { 
                    if (String.Compare(assemblyPath, 0, changedAsm, 0, length, StringComparison.OrdinalIgnoreCase) == 0)
                    { 
                        bInKnownChangedList = true;
                        break;
                    }
                } 

                bCouldbeChanged = bInKnownChangedList; 
            } 
            else
            { 
                if (knownUnchangedReferencePaths != null && knownUnchangedReferencePaths.Length > 0)
                {
                    foreach (string unchangePath in knownUnchangedReferencePaths)
                    { 
                        if (assemblyPath.StartsWith(unchangePath, StringComparison.OrdinalIgnoreCase) == true)
                        { 
                            bCouldbeChanged = false; 
                            break;
                        } 
                    }
                }
                if (bCouldbeChanged)
                { 
                    IEnumerable gacRoots = GetGacPaths();
                    if (gacRoots != null) 
                    { 
                        foreach (string gacRoot in gacRoots)
                        { 
                            if (!String.IsNullOrEmpty(gacRoot) && assemblyPath.StartsWith(gacRoot, StringComparison.OrdinalIgnoreCase) == true)
                            {
                                bCouldbeChanged = false;
                            } 
                        }
                    } 
                } 
            }
 
            return bCouldbeChanged;

        }
 

        internal static string GetWholeExceptionMessage(Exception exception) 
        { 
            Exception e = exception;
            string message = e.Message; 

            while (e.InnerException != null)
            {
                Exception eInner = e.InnerException; 
                if (e.Message.IndexOf(eInner.Message, StringComparison.Ordinal) == -1)
                { 
                    message += ", "; 
                    message += eInner.Message;
                } 
                e = eInner;
            }

            if (message != null && message.EndsWith(".", StringComparison.Ordinal) == false) 
            {
                message += "."; 
            } 

            return message; 

        }

        // 
        // Helper to create CompilerWrapper.
        // 
        internal static CompilerWrapper CreateCompilerWrapper(bool fInSeparateDomain, ref AppDomain  appDomain) 
        {
            CompilerWrapper compilerWrapper; 

            appDomain = null;

            Assembly curAsm = Assembly.GetExecutingAssembly(); 

            if (fInSeparateDomain) 
            { 

                appDomain = AppDomain.CreateDomain("markupCompilationAppDomain", null, AppDomain.CurrentDomain.SetupInformation); 

                BindingFlags bf = BindingFlags.Public | BindingFlags.InvokeMethod | BindingFlags.CreateInstance | BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.SetProperty;

 
                compilerWrapper = appDomain.CreateInstanceAndUnwrap(curAsm.FullName,
                                                             typeof(CompilerWrapper).FullName, 
                                                             false, 
                                                             bf,
                                                             null, null, null, null, null) as CompilerWrapper; 
            }
            else
            {
                compilerWrapper = new CompilerWrapper(); 
            }
 
            return compilerWrapper; 
        }
 
        #endregion Internal Methods

     }
 
    #endregion TaskHelper class
} 
 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.

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