51 lines
2.3 KiB
Lua
51 lines
2.3 KiB
Lua
local function env_key(str)
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if PLATFORM == "Windows" then return str:upper() else return str end
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end
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---Sorts the environment variable by its key, converted to uppercase.
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---This is only needed on Windows.
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local function compare_env(a, b)
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return env_key(a:match("([^=]*)=")) < env_key(b:match("([^=]*)="))
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end
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local old_start = process.start
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function process.start(command, options)
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assert(type(command) == "table" or type(command) == "string", "invalid argument #1 to process.start(), expected string or table, got "..type(command))
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assert(type(options) == "table" or type(options) == "nil", "invalid argument #2 to process.start(), expected table or nil, got "..type(options))
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if PLATFORM == "Windows" then
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if type(command) == "table" then
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-- escape the arguments into a command line string
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-- https://github.com/python/cpython/blob/48f9d3e3faec5faaa4f7c9849fecd27eae4da213/Lib/subprocess.py#L531
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local arglist = {}
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for _, v in ipairs(command) do
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local backslash, arg = 0, {}
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for c in v:gmatch(".") do
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if c == "\\" then backslash = backslash + 1
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elseif c == '"' then arg[#arg+1] = string.rep("\\", backslash * 2 + 1)..'"'; backslash = 0
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else arg[#arg+1] = string.rep("\\", backslash) .. c; backslash = 0 end
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end
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arg[#arg+1] = string.rep("\\", backslash) -- add remaining backslashes
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if #v == 0 or v:find("[\t\v\r\n ]") then arglist[#arglist+1] = '"'..table.concat(arg, "")..'"'
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else arglist[#arglist+1] = table.concat(arg, "") end
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end
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command = table.concat(arglist, " ")
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end
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else
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command = type(command) == "table" and command or { command }
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end
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if type(options) == "table" and options.env then
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local user_env = options.env --[[@as table]]
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options.env = function(system_env)
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local final_env, envlist = {}, {}
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for k, v in pairs(system_env) do final_env[env_key(k)] = k.."="..v end
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for k, v in pairs(user_env) do final_env[env_key(k)] = k.."="..v end
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for _, v in pairs(final_env) do envlist[#envlist+1] = v end
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if PLATFORM == "Windows" then table.sort(envlist, compare_env) end
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return table.concat(envlist, "\0").."\0\0"
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end
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end
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return old_start(command, options)
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end
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return process
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