40 lines
1.2 KiB
Text
40 lines
1.2 KiB
Text
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if shell.environment == nil then error("Requires the cash shell.") end
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local args = {...}
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local env = setmetatable({}, {__index = _ENV})
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local path = shell.path()
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local unset = {}
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local cmd = {}
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local cmdargs = false
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local nextarg
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for k,v in ipairs(args) do
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if nextarg then
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if nextarg == 1 then path = v
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elseif nextarg == 2 then table.insert(unset, v) end
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nextarg = nil
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elseif cmdargs then
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table.insert(cmd, v)
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else
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if v == "-i" then setmetatable(env, {__index = _G})
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elseif v == "-P" then nextarg = 1
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elseif v == "-u" then nextarg = 2
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elseif string.find(v, "=") then env[string.sub(v, 1, string.find(v, "=") - 1)] = string.sub(v, string.find(v, "=") + 1)
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else table.insert(cmd, v); cmdargs = true end
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end
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end
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if #unset > 0 then
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local oldidx = getmetatable(env).__index
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local u = {}
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for k,v in ipairs(unset) do u[v] = true end
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setmetatable(env, {__index = function(self, name) if u[name] then return nil else return oldidx[name] end end})
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end
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local oldPath = shell.path()
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local oldEnv = shell.environment()
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shell.setPath(path)
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shell.setEnvironment(env)
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shell.run(table.unpack(cmd))
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shell.setPath(oldPath)
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shell.setEnvironment(oldEnv)
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