Item9149: Add tools/extension_installer to the MANIFEST - support generic extension installer

The generic extension installer seems to work fine.

• Add to MANIFEST
• Update for common copyright
• Improve usage documentation a bit and handle if called without extension name.

The generic installer is the standard template installer, with the minor addition of supporting the extension name as an argument. With both the custom and generic installers, the package installer code can download an updated installer if required.

For example, to install an extension, such as GenPDFAddOn, the two options are:

Install using downloaded installer.

• Download GenPDFAddOn_installer into the root of the Foswiki installation
• Run GenPDFAddOn_installer

   perl GenPDFAddOn_installer

• Package installer will download the extension archive from repository location contained within the custom installer file, and proceed with installation

Install using generic installer

Note: The generic installer will only download extensions from the default Foswiki Extensions repository. If an alternate location is required, the custom installer or web installer must be used!

• Run generic installer

   perl tools/extension_installer GenPDFAddOn install

• Package installer will download the GenPDFAddOn_installer, along with the extension archive and proceed with installation.

As with the custom installers, the generic installer can be used to uninstall an extension

   perl tools/extension_installer GenPDFAddOn uninstall

For further information, use the usage command.

   perl tools/extension_installer usage

-- GeorgeClark - 12 Jun 2010

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