61 lines
989 B
Lua
61 lines
989 B
Lua
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local M = {}
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local function to_keys(t)
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local ret = {}
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for _, v in ipairs(t) do
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ret[v] = true
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end
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return ret
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end
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local function collect_keys(t)
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local ret = {}
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for v in pairs(t) do
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table.insert(ret, v)
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end
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return ret
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end
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function M.get_packages(file, features)
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local feature_table = to_keys(features)
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local funcs = {}
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function funcs._(feature)
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if feature_table[feature] then
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return feature
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end
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end
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local nodefault = {}
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local packages = {}
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function funcs.feature(match, options)
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if not match then
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return
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end
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if options.nodefault then
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nodefault[match] = true
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end
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for _, package in ipairs(options.packages or {}) do
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packages[package] = true
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end
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end
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-- Evaluate the feature definition file
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local f = loadfile(file)
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setfenv(f, funcs)
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f()
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-- Handle default packages
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for _, feature in ipairs(features) do
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if not nodefault[feature] then
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packages['gluon-' .. feature] = true
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end
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end
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return collect_keys(packages)
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end
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return M
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