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Library
Module
Module type
Parameter
Class
Class type
Library
Module
Module type
Parameter
Class
Class type
This class can be inherited to define a configurable
with an API similar to foreign
.
In particular, it allows dynamic packages. Here is an example:
let main = impl @@ object
inherit [_] foreign
"Unikernel.Main" (console @-> job)
method packages = Key.(if_ is_xen)
[package ~sublibs:["xen"] "vchan"]
[package ~sublibs:["lwt"] "vchan"]
end
method ty : 'ty typ
ty
is the module type of the configurable.
packages
is the list of OPAM packages which needs to be installed before compiling the configurable.
method connect : Info.t -> string -> string list -> string
connect info mod args
is the code to execute in order to initialize the state associated with the module mod
(usually calling mod.connect
) with the arguments args
, in the context of the project information info
.
method configure : Info.t -> (unit, Rresult.R.msg) Rresult.result
configure info
is the code to execute in order to configure the device. During the configuration phase, the specficied packages
might not yet be there. The code might involve generating more OCaml code, running shell scripts, etc.
method build : Info.t -> (unit, Rresult.R.msg) Rresult.result
build info
is the code to execute in order to build the device. During the build phase, you can rely that all packages
are installed (via opam). The code might involve generating more OCaml code (crunching directories), running shell scripts, etc.
method clean : Info.t -> (unit, Rresult.R.msg) Rresult.result
clean info
is the code to clean-up what has been generated by build
and configure
.
method keys : key list
keys
is the list of command-line keys to set-up the configurable.
method deps : abstract_impl list
deps
is the list of abstract implementations that must be initialized before calling connect
.