98 linhas
3,6 KiB
Lua
98 linhas
3,6 KiB
Lua
-- executor.lua - responsible for execution of the tasks
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--
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-- Copyright (C) 2024-2025 Kıvılcım Defne Öztürk
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--
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-- This program is free software: you can redistribute it and/or modify
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-- it under the terms of the GNU General Public License as published by
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-- the Free Software Foundation, either version 3 of the License, or
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-- (at your option) any later version.
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--
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-- This program is distributed in the hope that it will be useful,
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-- but WITHOUT ANY WARRANTY; without even the implied warranty of
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-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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-- GNU General Public License for more details.
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--
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-- You should have received a copy of the GNU General Public License
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-- along with this program. If not, see <https://www.gnu.org/licenses/>.
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local lament = require("lament")
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local pl = require("pl")
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require("lament.util.enum")
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require("lament.loader")
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require("lament.hooks")
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local switch, case = assert(require("lament.util.switch"))
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lament.executor = {}
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lament.executor.CeaseAnd = assert(lament.enum(
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'halt',
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'load_last',
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'infer_from_effective',
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'infer_from_desired'
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), "BUG: lament.enum returns falsy values")
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--- Starts calibration of the system according to the desired state
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--- If the desired state is malconfigured, perform the appropriate resolution,
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--- as defined by the key `cease_and` in the auto-config.
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function lament.executor.start_application()
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-- Obtain cessation behavior
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local cease_and = lament._sysconf.lament.cease_and or lament.executor.CeaseAnd.load_last
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-- Prepare backends
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lament.boot_backends()
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-- Apply forwards.
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for i = 1, #lament.backends do
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if not lament.backends[i].apply() then
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switch(cease_and) {
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[case(lament.executor.CeaseAnd.halt)] = function()
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error(string.format("Backend %s failed to apply", lament.backends[i].name), 2)
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end,
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[case(lament.executor.CeaseAnd.infer_from_effective)] = function()
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-- TODO: implement inference from effective state
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end,
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[case(lament.executor.CeaseAnd.infer_from_desired)] = function()
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-- TODO: implement inference from desired state
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end,
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[case(lament.executor.CeaseAnd.load_last)] = function()
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-- TODO: implement conflict resolution
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end
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}
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goto continue
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end
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::continue::
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end
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end
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--- Starts recalibration of the system state according to the present state
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--- If the present state is malconfigured, performs the desired resolution
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--- as defined by the key `cease_and` in the auto-config.
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function lament.executor.start_recalibration()
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-- Obtain cessation behavior
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local cease_and = lament._sysconf.lament.cease_and or lament.executor.CeaseAnd.load_last
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-- Prepare backends
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lament.boot_backends()
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-- Apply backwards (commit recalibration)
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for i = 1, #lament.backends do
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if not lament.backends[i].recalibrate() then
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switch(cease_and) {
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[case(lament.executor.CeaseAnd.halt())] = function ()
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error(string.format("Backend %s failed to recalibrate", lament.backends[i].name), 2)
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end,
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[case(lament.executor.CeaseAnd.infer_from_effective())] = function ()
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infer_etc_hook()
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end,
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[case(lament.executor.CeaseAnd.infer_from_desired())] = function ()
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infer_decl_hook()
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end,
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[case(lament.executor.CeaseAnd.load_last())] = function ()
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load_last_hook()
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end
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}
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end
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end
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end
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lament.executor.__cessation_actions = {}
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return lament.executor
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