(chocolateyGH-1949) Release mode - use entry assembly to check

When in release mode, a chocolatey.dll could be next to something being
tested. However, most of the time, for testing, it will be located at
the machine level install. When that is the case, the chocolatey
assembly is loaded into memory to keep from locking the files and the
executing assembly path is null, so it uses the current directory.

Instead prefer to look near the entry assembly, then defer to the
environment variable for the machine installation.

Author: ferventcoder

src/chocolatey/infrastructure.app/ApplicationParameters.cs

@@ -35,9 +35,23 @@ public static class ApplicationParameters
         // always look at the official location of the machine installation
         public static readonly string InstallLocation = System.Environment.GetEnvironmentVariable(ChocolateyInstallEnvironmentVariableName) ?? _fileSystem.get_directory_name(_fileSystem.get_current_assembly_path());
         public static readonly string LicensedAssemblyLocation = _fileSystem.combine_paths(InstallLocation, "extensions", "chocolatey", "chocolatey.licensed.dll");
-#else
+#elif DEBUG
         // Install location is choco.exe or chocolatey.dll
         public static readonly string InstallLocation = _fileSystem.get_directory_name(_fileSystem.get_current_assembly_path());
+        // when being used as a reference, start by looking next to Chocolatey, then in a subfolder.
+        public static readonly string LicensedAssemblyLocation = _fileSystem.file_exists(_fileSystem.combine_paths(InstallLocation, "chocolatey.licensed.dll")) ? _fileSystem.combine_paths(InstallLocation, "chocolatey.licensed.dll") : _fileSystem.combine_paths(InstallLocation, "extensions", "chocolatey", "chocolatey.licensed.dll");
+#else
+        // Install locations is chocolatey.dll or choco.exe - In Release mode
+        // we might be testing on a server or in the local debugger. Either way,
+        // start from the assembly location and if unfound, head to the machine
+        // locations instead. This is a merge of official and Debug modes.
+        public static readonly string InstallLocation = _fileSystem.file_exists(_fileSystem.combine_paths(_fileSystem.get_directory_name(Assembly.GetEntryAssembly().CodeBase.Replace("file:///", string.Empty)), "chocolatey.dll")) ?
+                _fileSystem.get_directory_name(Assembly.GetEntryAssembly().CodeBase.Replace("file:///", string.Empty)) :
+                !string.IsNullOrWhiteSpace(System.Environment.GetEnvironmentVariable(ChocolateyInstallEnvironmentVariableName)) ?
+                    System.Environment.GetEnvironmentVariable(ChocolateyInstallEnvironmentVariableName) :
+                    @"C:\ProgramData\Chocolatey"
+            ;
+
         // when being used as a reference, start by looking next to Chocolatey, then in a subfolder.
         public static readonly string LicensedAssemblyLocation = _fileSystem.file_exists(_fileSystem.combine_paths(InstallLocation, "chocolatey.licensed.dll")) ? _fileSystem.combine_paths(InstallLocation, "chocolatey.licensed.dll") : _fileSystem.combine_paths(InstallLocation, "extensions", "chocolatey", "chocolatey.licensed.dll");
 #endif

src/chocolatey/infrastructure/adapters/Assembly.cs

@@ -113,6 +113,11 @@ public static IAssembly GetExecutingAssembly()
         public static IAssembly GetCallingAssembly()
         {
             return new Assembly(System.Reflection.Assembly.GetCallingAssembly());
+        } 
+        
+        public static IAssembly GetEntryAssembly()
+        {
+            return new Assembly(System.Reflection.Assembly.GetEntryAssembly());
         }
 
         public static IAssembly set_assembly(System.Reflection.Assembly value)