prosody
638f627e707f
util/paths.lua

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util/paths.lua @ 13134:638f627e707f

util.datamanager: Add O(1) list indexing with on-disk index Index file contains offsets and lengths of each item() which allows seeking directly to each item and reading it without parsing the entire file. Also allows tricks like binary search, assuming items have some defined order. We take advantage of the 1-based indexing in tables to store a magic header in the 0 position, so that table index 1 ends up at file index 1.
author Kim Alvefur <zash@zash.se>
date Tue, 11 May 2021 02:09:56 +0200
parent 11183:2ac63715ef6f
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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2dc8dbd0940e util.paths: Add function for joining path segments
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1 local t_concat = table.concat;
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2
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3 local path_sep = package.config:sub(1,1);
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4
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5 local path_util = {}
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6
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7 -- Helper function to resolve relative paths (needed by config)
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8 function path_util.resolve_relative_path(parent_path, path)
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9 if path then
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10 -- Some normalization
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11 parent_path = parent_path:gsub("%"..path_sep.."+$", "");
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12 path = path:gsub("^%.%"..path_sep.."+", "");
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13
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14 local is_relative;
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15 if path_sep == "/" and path:sub(1,1) ~= "/" then
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16 is_relative = true;
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17 elseif path_sep == "\\" and (path:sub(1,1) ~= "/" and (path:sub(2,3) ~= ":\\" and path:sub(2,3) ~= ":/")) then
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18 is_relative = true;
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19 end
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20 if is_relative then
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21 return parent_path..path_sep..path;
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22 end
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23 end
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24 return path;
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25 end
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26
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27 -- Helper function to convert a glob to a Lua pattern
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28 function path_util.glob_to_pattern(glob)
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29 return "^"..glob:gsub("[%p*?]", function (c)
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30 if c == "*" then
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31 return ".*";
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32 elseif c == "?" then
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33 return ".";
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34 else
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35 return "%"..c;
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36 end
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37 end).."$";
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38 end
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39
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40 function path_util.join(a, b, c, ...) -- (... : string) --> string
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41 -- Optimization: Avoid creating table for most uses
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42 if b then
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43 if c then
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44 if ... then
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45 return t_concat({a,b,c,...}, path_sep);
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46 end
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47 return a..path_sep..b..path_sep..c;
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48 end
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49 return a..path_sep..b;
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50 end
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51 return a;
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52 end
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53
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54 function path_util.complement_lua_path(installer_plugin_path)
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55 -- Checking for duplicates
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56 -- The commands using luarocks need the path to the directory that has the /share and /lib folders.
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57 local lua_version = _VERSION:match(" (.+)$");
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58 local lua_path_sep = package.config:sub(3,3);
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59 local dir_sep = package.config:sub(1,1);
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60 local sub_path = dir_sep.."lua"..dir_sep..lua_version..dir_sep;
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61 if not string.find(package.path, installer_plugin_path, 1, true) then
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62 package.path = package.path..lua_path_sep..installer_plugin_path..dir_sep.."share"..sub_path.."?.lua";
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63 package.path = package.path..lua_path_sep..installer_plugin_path..dir_sep.."share"..sub_path.."?"..dir_sep.."init.lua";
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64 end
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65 if not string.find(package.path, installer_plugin_path, 1, true) then
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66 package.cpath = package.cpath..lua_path_sep..installer_plugin_path..dir_sep.."lib"..sub_path.."?.so";
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67 end
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68 end
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69
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70 return path_util;