/usr/share/lmod/5.8/tools/serializeTbl.lua is in lmod 5.8-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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-- This collection of routines are used to convert a table into a string.
-- This string is valid lua code. Note that this will only work for "DAG"
-- and not loops. There are more general solutions available but the
-- output less attractive. Since Lmod tables are DAG's this works fine.
--
-- Typical usage:
-- Write to a file:
-- serializeTbl{indent=true, name="SomeName", value=luaTable,
-- fn = "/path/to/file"}
-- Generate String:
-- s = serializeTbl{indent=true, name="SomeName", value=luaTable}
--
-- @module serializeTbl
require("strict")
------------------------------------------------------------------------
--
-- Copyright (C) 2008-2014 Robert McLay
--
-- Permission is hereby granted, free of charge, to any person obtaining
-- a copy of this software and associated documentation files (the
-- "Software"), to deal in the Software without restriction, including
-- without limitation the rights to use, copy, modify, merge, publish,
-- distribute, sublicense, and/or sell copies of the Software, and to
-- permit persons to whom the Software is furnished to do so, subject
-- to the following conditions:
--
-- The above copyright notice and this permission notice shall be
-- included in all copies or substantial portions of the Software.
--
-- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
-- EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
-- OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
-- NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
-- BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
-- ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
-- CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-- THE SOFTWARE.
--
--------------------------------------------------------------------------
require("fileOps")
require("pairsByKeys")
require("TermWidth")
--------------------------------------------------------------------------
-- Convert the string value into a quoted string of some kind and boolean
-- into true/false.
local function nsformat(value)
if (type(value) == 'string') then
if (value:find("\n")) then
value = "[[\n" .. value .. "\n]]"
else
value = value:gsub('"','\\"')
value = "\"" .. value .. "\""
end
elseif (type(value) == 'boolean') then
if (value) then
value = 'true'
else
value = 'false'
end
end
return value
end
--------------------------------------------------------------------------
-- This is the work-horse for this collections. It is recursively for
-- sub-tables. It also ignores keys that start with "_".
local function outputTblHelper(indentIdx, name, T, a, level)
-------------------------------------------------
-- Remove all keys in table that start with "_"
local t = {}
for key in pairs(T) do
if (type(key) == "number" or key:sub(1,1) ~= '_') then
t[key] = T[key]
end
end
--------------------------------------------------
-- Set initial indent
local indent = ''
if (indentIdx > 0) then
indent = string.rep(" ",indentIdx)
end
--------------------------------------------------
-- Form name: Wrap name in [] if it has special
-- characters or it start with a number.
local str
if (type(name) == 'string') then
if (name:find("[-+:./]") or name == "local" or name == "nil" or
name:sub(1,1):find("[0-9]")) then
str = indent .. "[\"" .. name .. "\"] = {\n"
else
str = indent .. name .. " = {\n"
end
else
str = indent .. "{\n"
end
a[#a+1] = str
--------------------------------------------------
-- Update indent
local origIndentIdx = indentIdx
local origIndent = indent
if (indentIdx >= 0) then
indentIdx = indentIdx + 2
indent = string.rep(" ",indentIdx)
end
-- verify if is an array with no tables in it.
local isArray = true
for key, value in pairs(t) do
if (type(value) == "table" or type(key) == "string") then
isArray = false
break
end
end
local twidth = TermWidth()
local w = 0
if (isArray) then
a[#a+1] = indent
w = w + indent:len()
for i = 1,#t-1 do
a[#a+1] = nsformat(t[i])
w = w + a[#a]:len()
a[#a+1] = ", "
w = w + a[#a]:len()
if ( w > twidth) then
table.insert(a,#a-2,"\n" .. indent)
w = a[#a-1]:len()+2+indent:len()
end
end
if (#t > 0) then
a[#a+1] = nsformat(t[#t])
a[#a+1] = ",\n"
end
else
for key, value in pairsByKeys(t) do
if (type(value) == 'table') then
outputTblHelper(indentIdx, key, t[key], a, level+1)
else
if (type(key) == "string") then
str = indent .. '[\"'..key ..'\"] = '
else
str = indent
end
a[#a+1] = str
a[#a+1] = nsformat(t[key])
a[#a+1] = ",\n"
end
end
end
indent = origIndent
indentIdx = origIndentIdx
if (level == 0) then
a[#a+1] = indent .. '}\n'
else
a[#a+1] = indent .. "},\n"
end
end
--------------------------------------------------------------------------
-- The interface routine for this file. Note that it returns a string
-- if no file name is given.
-- @param options input table.
function serializeTbl(options)
local a = {}
local n = options.name
local level = 0
local value = options.value
local indentIdx = -1
if (options.indent) then
indentIdx = 0
end
if (type(value) == "table") then
outputTblHelper(indentIdx, options.name, options.value, a, level)
else
a[#a+1] = n
a[#a+1] = " = "
a[#a+1] = nsformat(value)
a[#a+1] = "\n"
end
local s = table.concat(a,"")
if (options.fn == nil) then
return s
end
local fn = options.fn
local d = dirname(fn)
if (not isDir(d)) then
os.execute('mkdir -p ' .. d)
end
local f = assert(io.open(fn, "w"))
f:write("-- -*- lua -*-\n")
f:write("-- created: ",os.date()," --\n")
f:write(s)
f:close()
end
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