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annotate share/lua/5.2/luarocks/persist.lua @ 12500:e48c08805365 draft default tip

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<b_jonas> ` learn \'The password of the month is Cthulhuquagdonic Mothraquagdonic Narwhalicorn.\' # https://logs.esolangs.org/libera-esolangs/2024-04.html#lKE Infinite craft
author HackEso <hackeso@esolangs.org>
date Wed, 01 May 2024 06:39:10 +0000
parents d137f631bad5
children
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rev   line source
1132
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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1
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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2 --- Utility module for loading files into tables and
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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3 -- saving tables into files.
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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4 -- Implemented separately to avoid interdependencies,
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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5 -- as it is used in the bootstrapping stage of the cfg module.
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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6 module("luarocks.persist", package.seeall)
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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7
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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8 local util = require("luarocks.util")
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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9
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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10 --- Load a Lua file containing assignments, storing them in a table.
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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11 -- The global environment is not propagated to the loaded file.
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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12 -- @param filename string: the name of the file.
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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13 -- @param tbl table or nil: if given, this table is used to store
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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14 -- loaded values.
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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15 -- @return table or (nil, string): a table with the file's assignments
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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16 -- as fields, or nil and a message in case of errors.
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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17 function load_into_table(filename, tbl)
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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18 assert(type(filename) == "string")
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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19 assert(type(tbl) == "table" or not tbl)
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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20
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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21 local result, chunk, ran, err
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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22 local result = tbl or {}
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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23 if setfenv then -- Lua 5.1
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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24 chunk, err = loadfile(filename)
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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25 if chunk then
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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26 setfenv(chunk, result)
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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27 ran, err = pcall(chunk)
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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28 end
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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29 else -- Lua 5.2
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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30 chunk, err = loadfile(filename, "t", result)
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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31 if chunk then
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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32 ran, err = pcall(chunk)
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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33 end
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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34 end
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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35
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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36 if not chunk then
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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37 if err:sub(1,5) ~= filename:sub(1,5) then
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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38 return false, err
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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39 end
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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40 return nil, "Error loading file: "..err
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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41 end
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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42 if not ran then
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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43 return nil, "Error running file: "..err
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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44 end
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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45 return result
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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46 end
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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47
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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48 local write_table
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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49
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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50 --- Write a value as Lua code, invoking write_table.
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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51 -- This function handles only numbers, strings and tables
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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52 -- are keys (tables are handled recursively).
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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53 -- @param out userdata: a file object, open for writing.
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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54 -- @param v: the value to be written.
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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55 -- @param level number: the indentation level
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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56 -- @param sub_order table: optional prioritization table
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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57 -- @see write_table
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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58 local function write_value(out, v, level, sub_order)
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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59 if type(v) == "table" then
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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60 write_table(out, v, level + 1, sub_order)
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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61 elseif type(v) == "string" then
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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62 if v:match("\n") then
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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63 local open, close = "[[", "]]"
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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64 local equals = 0
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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65 while v:find(open,1,true) or v:find(close,1,true) do
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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66 equals = equals + 1
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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67 local eqs = ("="):rep(equals)
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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68 open, close = "["..eqs.."[", "]"..eqs.."]"
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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69 end
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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70 out:write(open.."\n"..v..close)
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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71 else
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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72 out:write("\""..v:gsub("\"", "\\\"").."\"")
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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73 end
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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74 else
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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75 out:write(tostring(v))
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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76 end
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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77 end
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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78
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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79 --- Write a table as Lua code representing a table to disk
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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80 -- (that is, in curly brackets notation).
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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81 -- This function handles only numbers, strings and tables
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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82 -- are keys (tables are handled recursively).
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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83 -- @param out userdata: a file object, open for writing.
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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84 -- @param tbl table: the table to be written.
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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parents:
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85 -- @param level number: the indentation level
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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parents:
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86 -- @param field_order table: optional prioritization table
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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87 write_table = function(out, tbl, level, field_order)
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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88 out:write("{")
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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89 local sep = "\n"
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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90 local indentation = " "
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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91 local indent = true
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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92 local i = 1
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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93 for k, v, sub_order in util.sortedpairs(tbl, field_order) do
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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94 out:write(sep)
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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95 if indent then
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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96 for n = 1,level do out:write(indentation) end
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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97 end
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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98 sep = ",\n"
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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99 indent = true
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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100 if type(k) == "number" then
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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101 if k ~= i then
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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102 out:write("["..tostring(k).."]=")
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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103 else
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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104 i = i + 1
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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105 end
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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106 indent = false
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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107 sep = ", "
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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108 elseif type(k) == "table" then
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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109 out:write("[")
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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parents:
diff changeset
110 write_table(out, k, level + 1)
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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111 out:write("] = ")
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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112 else
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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113 if k:match("^[a-zA-Z_][a-zA-Z0-9_]*$") then
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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114 out:write(k.." = ")
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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115 else
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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116 out:write("['"..k:gsub("'", "\\'").."'] = ")
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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117 end
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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118 end
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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119 write_value(out, v, level, sub_order)
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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120 end
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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121 if sep ~= "\n" then
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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122 out:write("\n")
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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123 for n = 1,level-1 do out:write(indentation) end
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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124 end
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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125 out:write("}")
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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126 end
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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127
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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128 --- Writes a table to an io-like object.
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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129 -- @param out userdata: a file object, open for writing.
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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130 -- @param tbl table: the table to be written.
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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parents:
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131 -- @param field_order table: optional prioritization table
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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132 -- @return userdata The file object originally passed in as the `out` parameter.
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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133 local function write_table(out, tbl, field_order)
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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134 for k, v, sub_order in util.sortedpairs(tbl, field_order) do
d137f631bad5 <GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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135 out:write(k.." = ")
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136 write_value(out, v, 0, sub_order)
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137 out:write("\n")
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138 end
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139 return out
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140 end
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141
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142 --- Save the contents of a table to a string.
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143 -- Each element of the table is saved as a global assignment.
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144 -- Only numbers, strings and tables (containing numbers, strings
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145 -- or other recursively processed tables) are supported.
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146 -- @param tbl table: the table containing the data to be written
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147 -- @param field_order table: an optional array indicating the order of top-level fields.
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148 -- @return string
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149 function save_from_table_to_string(tbl, field_order)
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150 local out = {buffer = {}}
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151 function out:write(data) table.insert(self.buffer, data) end
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152 write_table(out, tbl, field_order)
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153 return table.concat(out.buffer)
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154 end
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155
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156 --- Save the contents of a table in a file.
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157 -- Each element of the table is saved as a global assignment.
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158 -- Only numbers, strings and tables (containing numbers, strings
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159 -- or other recursively processed tables) are supported.
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160 -- @param filename string: the output filename
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161 -- @param tbl table: the table containing the data to be written
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162 -- @param field_order table: an optional array indicating the order of top-level fields.
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163 -- @return boolean or (nil, string): true if successful, or nil and a
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164 -- message in case of errors.
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165 function save_from_table(filename, tbl, field_order)
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166 local out = io.open(filename, "w")
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167 if not out then
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168 return nil, "Cannot create file at "..filename
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169 end
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170 write_table(out, tbl, field_order)
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171 out:close()
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172 return true
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173 end