(#3193) Add ability to ignore current http cache

src/chocolatey.resources/helpers/ChocolateyTabExpansion.ps1

@@ -38,7 +38,7 @@ function script:chocoCmdOperations($commands, $command, $filter, $currentArgumen
 $script:chocoCommands = @('-?','search','list','info','install','outdated','upgrade','uninstall','new','pack','push','-h','--help','pin','source','config','feature','apikey','export','help','template','--version')
 
 # ensure these all have a space to start, or they will cause issues
-$allcommands = " --debug --verbose --trace --noop --help -? --online --accept-license --confirm --limit-output --no-progress --log-file='' --execution-timeout='' --cache-location='' --proxy='' --proxy-user='' --proxy-password='' --proxy-bypass-list='' --proxy-bypass-on-local --force --no-color --skip-compatibility-checks"
+$allcommands = " --debug --verbose --trace --noop --help -? --online --accept-license --confirm --limit-output --no-progress --log-file='' --execution-timeout='' --cache-location='' --proxy='' --proxy-user='' --proxy-password='' --proxy-bypass-list='' --proxy-bypass-on-local --force --no-color --skip-compatibility-checks --ignore-http-cache"
 
 $commandOptions = @{
     list      = "--id-only --pre --exact --by-id-only --id-starts-with --detailed --prerelease --include-programs --source='' --page='' --page-size=''"

src/chocolatey/infrastructure.app/builders/ConfigurationBuilder.cs

@@ -441,6 +441,15 @@ private static void SetGlobalOptions(IList<string> args, ChocolateyConfiguration
                         .Add("skipcompatibilitychecks|skip-compatibility-checks",
                             "SkipCompatibilityChecks - Prevent warnings being shown before and after command execution when a runtime compatibility problem is found between the version of Chocolatey and the Chocolatey Licensed Extension. Available in 1.1.0+",
                             option => config.DisableCompatibilityChecks = option != null)
+                        .Add("ignore-http-cache",
+                            "IgnoreHttpCache - Ignore any HTTP caches that have previously been created when querying sources, and create new caches. Available in 2.1.0+",
+                            option =>
+                            {
+                                if (option != null)
+                                {
+                                    config.CacheExpirationInMinutes = -1;
+                                }
+                            });
                         ;
                 },
                 (unparsedArgs) =>

src/chocolatey/infrastructure.app/configuration/ChocolateyConfiguration.cs

@@ -38,6 +38,7 @@ public ChocolateyConfiguration()
             RegularOutput = true;
             PromptForConfirmation = true;
             DisableCompatibilityChecks = false;
+            CacheExpirationInMinutes = 30;
             SourceType = SourceTypes.Normal;
             Information = new InformationCommandConfiguration();
             Features = new FeaturesConfiguration();
@@ -340,6 +341,15 @@ private void AppendOutput(StringBuilder propertyValues, string append)
         public bool ApplyInstallArgumentsToDependencies { get; set; }
         public bool IgnoreDependencies { get; set; }
 
+        /// <summary>
+        /// Gets or sets the time before the cache is considered to have expired in minutes.
+        /// </summary>
+        /// <value>
+        /// The cache expiration in minutes.
+        /// </value>
+        /// <remarks>specifying a negative number disables the caching completely.</remarks>
+        public int CacheExpirationInMinutes { get; set; }
+
         public bool AllowDowngrade { get; set; }
         public bool ForceDependencies { get; set; }
         public string DownloadChecksum { get; set; }

src/chocolatey/infrastructure.app/configuration/ConfigurationOptions.cs

@@ -79,7 +79,7 @@ public static void ParseArgumentsAndUpdateConfiguration(ICollection<string> args
                         "Prints out the help menu.",
                         option => configuration.HelpRequested = option != null)
                     .Add("online",
-                        "Online - Open help for specified command in default browser application. This option only works when used in combintation with the -?/--help/-h option.",
+                        "Online - Open help for specified command in default browser application. This option only works when used in combintation with the -?/--help/-h option.  Available in 2.0.0+",
                         option => configuration.ShowOnlineHelp = option != null);
             }
 

src/chocolatey/infrastructure.app/nuget/ChocolateySourceCacheContext.cs

@@ -1,14 +1,9 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-
-namespace chocolatey.infrastructure.app.nuget
+namespace chocolatey.infrastructure.app.nuget
 {
+    using System;
     using System.Threading;
     using Alphaleonis.Win32.Filesystem;
-    using configuration;
+    using chocolatey.infrastructure.app.configuration;
     using NuGet.Protocol.Core.Types;
 
     public class ChocolateySourceCacheContext : SourceCacheContext
@@ -22,6 +17,16 @@ public class ChocolateySourceCacheContext : SourceCacheContext
         public ChocolateySourceCacheContext(ChocolateyConfiguration config)
         {
             _chocolateyCacheLocation = config.CacheLocation;
+
+            if (config.CacheExpirationInMinutes <= 0)
+            {
+                MaxAge = DateTime.UtcNow;
+                RefreshMemoryCache = true;
+            }
+            else
+            {
+                MaxAge = DateTime.UtcNow.AddMinutes(-config.CacheExpirationInMinutes);
+            }
         }
 
         public override string GeneratedTempFolder