lists: add bootstrap list

lists/bootstrap.lua.m4

+--[[
+Root script for updater-ng configuration usable for bootstrapping.
+
+This script expects following variables to be possibly defined in environment:
+  BOARD: board name (Mox|Omnia|Turris)
+  L10N: commas separated list of languages to be installed in root.
+  LISTS: commas separated list of package lists to be included in root.
+  TESTKEY: if definied non-empty then test kyes are included in installation
+]]
+
+-- Sanity checks
+if root_dir == "/" then
+	DIE("Bootstrap is not allowed on root.")
+end
+
+-- Get target board
+-- Note: this is named as model for backward compatibility with variable provided
+-- by updater version <63
+model = os.getenv('BOARD')
+if not board then
+	-- TODO we might ask interactively
+	DIE("Target board has to be provided by BOARD environment variable.")
+end
+Export('model')
+
+-- Load requested localizations
+l10n = {}
+for lang in os.getenv('L10N'):gmatch('[^,]+') do
+	table.insert(l10n, lang)
+end
+Export('l10n')
+
+-- This is helper function for including localization packages.
+-- (This is copy of standard entry function that can be found in pkgupdate conf.lua)
+function for_l10n(fragment)
+	for _, lang in pairs(l10n or {}) do
+		Install(fragment .. lang, {ignore = {'missing'}})
+	end
+end
+Export('for_l10n')
+
+-- Aways include base script
+Script('base.lua')
+-- Include any additional lists
+for list in os.getenv('LISTS'):gmatch('[^,]+') do
+	Script(list .. '.lua')
+end
+
+if os.getenv('TESTKEY') then
+	Install('cznic-repo-keys-test')
+end