Michael Kuhn 802dc4a03a patch: split up fetch and clean into separate methods (#10150) ... "mirror create" was invoking a package's do_patch method in order to retrieve and archive URL patches. If a package implements a "patch" method, this is also called as part of do_patch; this failed when the package-specific implementation referred to environment variables that are only available at the time the package is built (e.g. "spack_cc"). This change introduces fetch and clean methods for patches. They are no-ops for FilePatch but perform the appropriate actions for UrlPatch. This allows "mirror create" to invoke do_fetch, which does not call the package's patch method.		2019-01-02 11:44:50 -08:00
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spack	patch: split up fetch and clean into separate methods (#10150)	2019-01-02 11:44:50 -08:00