# <gac-uninstall>

Uninstalls assemblies from the Global Assembly Cache (GAC) by using the `gacutil` SDK tool.

Assemblies are specified via an AssemblySet. Individual assemblies are specified by their identity information. Only a name is required but, optionally, the assembly version, culture and public key token may be specified.

Assemblies can be uninstalled from the GAC with or without reference counting. The full details of reference counting can be found in the SDK documentation.

### Parameters

Attribute | Type | Description | Required
--- | --- | --- | ---
force | bool | If true, the specified assemblies will be forcibly removed from the GAC. All references to the specified assemblies will be removed from the GAC prior to removing the assemblies themselves. The default is false. | False
native | bool | If true, specifies that the assemblies should be uninstalled from the native image cache. The default is false. | False
failonerror | bool | Determines if task failure stops the build, or is just reported. The default is true. | False
if | bool | If true then the task will be executed; otherwise, skipped. The default is true. | False
timeout | int | The maximum amount of time the application is allowed to execute, expressed in milliseconds. Defaults to no time-out. | False
unless | bool | Opposite of `if`. If false then the task will be executed; otherwise, skipped. The default is false. | False
verbose | bool | Determines whether the task should report detailed build log messages. The default is false. | False

### Framework-configurable parameters

Attribute | Type | Description | Required
--- | --- | --- | ---
useruntimeengine | bool | Specifies whether the external program should be executed using a runtime engine, if configured. The default is false. | False

### Nested Elements:

#### <assemblies>

Specifies the assemblies to uninstall.

Represents a set of assemblies via their identity information.

### Parameters

Attribute | Type | Description | Required
--- | --- | --- | ---
id | string | The ID used to be referenced later. | False
refid | string | The ID to use as the reference. | False

### Nested Elements:

#### <assembly>

The assemblies to include.

Represents a single assembly in an AssemblySet.

### Parameters

Attribute | Type | Description | Required
--- | --- | --- | ---
name | string | The name of the assembly. | True
culture | string | The culture for the assembly. | False
if | bool | If `true` then the assembly will be included. The default is `true`. | False
public-key-token | string | The public key token of the assembly. | False
unless | bool | Opposite of `if`. If `false` then the assembly will be included. The default is `false`. | False
version | string | The version of the assembly. | False

#### </assembly>

#### </assemblies>

#### <reference>

Specifies reference details to use when working with the GAC.

Used to specify reference information when working with the GAC.

The full details of GAC references can be found in the SDK documentation.

### Parameters

Attribute | Type | Description | Required
--- | --- | --- | ---
if | bool | If `true` then the entity will be included. The default is `true`. | False
scheme-description | string | The scheme description to use when working with GAC references. This is only relevant if a scheme type other than `None` is specified. | False
scheme-id | string | The scheme ID to use when working with GAC references. This is only relevant if a scheme type other than `None` is specified. | False
scheme-type | SchemeType | The scheme type to use when working with GAC references. The default is `None`, which means that references will not be used by the GAC task. | False
unless | bool | Opposite of `if`. If `false` then the entity will be included. The default is `false`. | False

#### </reference>

#### <arg>

The command-line arguments for the external program.

Represents a command-line argument.

### Parameters

Attribute | Type | Description | Required
--- | --- | --- | ---
dir | directory | The value for a directory-based command-line argument; will be replaced with the absolute path of the directory. | False
file | file | The name of a file as a single command-line argument; will be replaced with the absolute filename of the file. | False
if | bool | Indicates if the argument should be passed to the external program. If true then the argument will be passed; otherwise, skipped. The default is true. | False
line | string | List of command-line arguments; will be passed to the executable as is. | False
path | <path> | The value for a PATH-like command-line argument; you can use `:` or `;` as path separators and NAnt will convert it to the platform's local conventions, while resolving references to environment variables. | False
unless | bool | Indicates if the argument should not be passed to the external program. If false then the argument will be passed; otherwise, skipped. The default is false. | False
value | string | A single command-line argument; can contain space characters. | False

### Nested Elements:

#### <path>

Sets a single command-line argument and treats it like a PATH - ensures the right separator for the local platform is used.

#### </path>

### Examples

- A single command-line argument containing a space character.

      <arg value="-l -a" />

- Two separate command-line arguments.

      <arg line="-l -a" />

- A single command-line argument with the value `\dir;\dir2;\dir3` on DOS-based systems and `/dir:/dir2:/dir3` on Unix-like systems.

      <arg path="/dir;/dir2:\dir3" />

#### </arg>

### Examples

- Uninstalls `Shared` assembly from the GAC.

      <gac-uninstall>
             <assemblies>
                 <assembly name="Shared" />
             </assemblies>
      </gac-uninstall>

- Uninstalls `Shared` and `MyWeb` from the GAC.

      <gac-uninstall>
             <assemblies>
                 <assembly name="Shared" />
                 <assembly name="MyWeb" />
             </assemblies>
      </gac-uninstall>

- Decrements references to `Shared` in the GAC and uninstalls if the reference count reaches zero.

      <gac-uninstall>
          <reference scheme-type="Opaque" scheme-id="MyID" scheme-description="My description" />
             <assemblies>
                 <assembly name="Shared" />
             </assemblies>
      </gac-uninstall>

- Uninstalls version `2.1.7.9201` of `Shared` plus the Australian-cultured `MyWeb` from the GAC.

      <gac-uninstall>
             <assemblies>
                 <assembly name="Shared" version="2.1.7.9201" />
                 <assembly name="MyWeb" culture="en-AU" />
             </assemblies>
      </gac-uninstall>

- Uninstalls the neutrally-cultured, version `1.0.5000.0` of `System.Xml` from the native image cache. The assembly must also have a public key token of `b77a5c561934e08a` to be uninstalled.

      <gac-uninstall native="true">
             <assemblies>
                 <assembly name="System.Xml" version="1.0.5000.0" public-key-token="b77a5c561934e08a" culture="Neutral" />
             </assemblies>
      </gac-uninstall>

### Requirements

Assembly: NAnt.Contrib.Tasks (0.85.2479.0)