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annotate share/lua/5.2/luarocks/loader.lua @ 7617:f36d749de05d
<Kaynato> fetch http://pastebin.com/raw/Mcd6MMB5
author | HackBot |
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date | Fri, 29 Apr 2016 01:09:35 +0000 |
parents | d137f631bad5 |
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1132
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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1 |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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2 --- A module which installs a Lua package loader that is LuaRocks-aware. |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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3 -- This loader uses dependency information from the LuaRocks tree to load |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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4 -- correct versions of modules. It does this by constructing a "context" |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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5 -- table in the environment, which records which versions of packages were |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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6 -- used to load previous modules, so that the loader chooses versions |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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7 -- that are declared to be compatible with the ones loaded earlier. |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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8 local global_env = _G |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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9 local package, require, ipairs, pairs, table, type, next, unpack = |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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10 package, require, ipairs, pairs, table, type, next, unpack |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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11 |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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12 module("luarocks.loader") |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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13 |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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14 local path = require("luarocks.path") |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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15 local manif_core = require("luarocks.manif_core") |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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16 local deps = require("luarocks.deps") |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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17 local cfg = require("luarocks.cfg") |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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18 |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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19 context = {} |
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20 |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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21 -- Contains a table when rocks trees are loaded, |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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22 -- or 'false' to indicate rocks trees failed to load. |
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23 -- 'nil' indicates rocks trees were not attempted to be loaded yet. |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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24 rocks_trees = nil |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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25 |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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26 local function load_rocks_trees() |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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27 local any_ok = false |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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28 local trees = {} |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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29 for _, tree in ipairs(cfg.rocks_trees) do |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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30 local manifest, err = manif_core.load_local_manifest(path.rocks_dir(tree)) |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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31 if manifest then |
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32 any_ok = true |
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33 table.insert(trees, {tree=tree, manifest=manifest}) |
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34 end |
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35 end |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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36 if not any_ok then |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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37 rocks_trees = false |
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38 return false |
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39 end |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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40 rocks_trees = trees |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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41 return true |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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42 end |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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43 |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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44 --- Process the dependencies of a package to determine its dependency |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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45 -- chain for loading modules. |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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46 -- @param name string: The name of an installed rock. |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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47 -- @param version string: The version of the rock, in string format |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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48 function add_context(name, version) |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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49 -- assert(type(name) == "string") |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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50 -- assert(type(version) == "string") |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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51 |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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52 if context[name] then |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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53 return |
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54 end |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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55 context[name] = version |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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56 |
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57 if not rocks_trees and not load_rocks_trees() then |
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58 return nil |
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59 end |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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60 |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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61 local providers = {} |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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62 for _, tree in ipairs(rocks_trees) do |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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63 local manifest = tree.manifest |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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64 |
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65 local pkgdeps |
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66 if manifest.dependencies and manifest.dependencies[name] then |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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67 pkgdeps = manifest.dependencies[name][version] |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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68 end |
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69 if not pkgdeps then |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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70 return nil |
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71 end |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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72 for _, dep in ipairs(pkgdeps) do |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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73 local pkg, constraints = dep.name, dep.constraints |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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74 |
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75 for _, tree in ipairs(rocks_trees) do |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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76 local entries = tree.manifest.repository[pkg] |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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77 if entries then |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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78 for version, pkgs in pairs(entries) do |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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79 if (not constraints) or deps.match_constraints(deps.parse_version(version), constraints) then |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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80 add_context(pkg, version) |
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81 end |
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82 end |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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83 end |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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84 end |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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85 end |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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86 end |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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87 end |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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88 |
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89 --- Internal sorting function. |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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90 -- @param a table: A provider table. |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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91 -- @param b table: Another provider table. |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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92 -- @return boolean: True if the version of a is greater than that of b. |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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93 local function sort_versions(a,b) |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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94 return a.version > b.version |
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95 end |
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96 |
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97 --- Request module to be loaded through other loaders, |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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98 -- once the proper name of the module has been determined. |
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99 -- For example, in case the module "socket.core" has been requested |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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100 -- to the LuaRocks loader and it determined based on context that |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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101 -- the version 2.0.2 needs to be loaded and it is not the current |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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102 -- version, the module requested for the other loaders will be |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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103 -- "socket.core_2_0_2". |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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104 -- @param module The module name requested by the user, such as "socket.core" |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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105 -- @param name The rock name, such as "luasocket" |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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106 -- @param version The rock version, such as "2.0.2-1" |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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107 -- @param module_name The actual module name, such as "socket.core" or "socket.core_2_0_2". |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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108 -- @return table or (nil, string): The module table as returned by some other loader, |
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109 -- or nil followed by an error message if no other loader managed to load the module. |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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110 local function call_other_loaders(module, name, version, module_name) |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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111 for i, loader in pairs(package.loaders) do |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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112 if loader ~= luarocks_loader then |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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113 local results = { loader(module_name) } |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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114 if type(results[1]) == "function" then |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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115 return unpack(results) |
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116 end |
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117 end |
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118 end |
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119 return "Failed loading module "..module.." in LuaRocks rock "..name.." "..version |
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120 end |
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121 |
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122 --- Search for a module in the rocks trees |
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123 -- @param module string: module name (eg. "socket.core") |
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124 -- @param filter_module_name function(string, string, string, string, number): |
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125 -- a function that takes the module name (eg "socket.core"), the rock name |
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126 -- (eg "luasocket"), the version (eg "2.0.2-1"), the path of the rocks tree |
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127 -- (eg "/usr/local"), and the numeric index of the matching entry, so the |
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128 -- filter function can know if the matching module was the first entry or not. |
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129 -- @return string, string, string: name of the rock containing the module |
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130 -- (eg. "luasocket"), version of the rock (eg. "2.0.2-1"), |
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131 -- name of the module (eg. "socket.core", or "socket.core_2_0_2" if file is |
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132 -- stored versioned). |
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133 local function select_module(module, filter_module_name) |
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134 --assert(type(module) == "string") |
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135 --assert(type(filter_module_name) == "function") |
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136 |
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137 if not rocks_trees and not load_rocks_trees() then |
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138 return nil |
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139 end |
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140 |
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141 local providers = {} |
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142 for _, tree in ipairs(rocks_trees) do |
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143 local entries = tree.manifest.modules[module] |
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144 if entries then |
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145 for i, entry in ipairs(entries) do |
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146 local name, version = entry:match("^([^/]*)/(.*)$") |
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147 local module_name = tree.manifest.repository[name][version][1].modules[module] |
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148 if type(module_name) ~= "string" then |
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149 error("Invalid format in manifest file (invalid data for "..tostring(name).." "..tostring(version)..")") |
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150 end |
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151 module_name = filter_module_name(module_name, name, version, tree.tree, i) |
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152 if context[name] == version then |
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153 return name, version, module_name |
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154 end |
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155 version = deps.parse_version(version) |
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156 table.insert(providers, {name = name, version = version, module_name = module_name}) |
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157 end |
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158 end |
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159 end |
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160 |
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161 if next(providers) then |
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162 table.sort(providers, sort_versions) |
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163 local first = providers[1] |
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164 return first.name, first.version.string, first.module_name |
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165 end |
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166 end |
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167 |
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168 --- Search for a module |
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169 -- @param module string: module name (eg. "socket.core") |
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170 -- @return string, string, string: name of the rock containing the module |
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171 -- (eg. "luasocket"), version of the rock (eg. "2.0.2-1"), |
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172 -- name of the module (eg. "socket.core", or "socket.core_2_0_2" if file is |
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173 -- stored versioned). |
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174 local function pick_module(module) |
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175 return |
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176 select_module(module, function(module_name, name, version, tree, i) |
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177 if i > 1 then |
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178 module_name = path.versioned_name(module_name, "", name, version) |
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179 end |
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180 module_name = path.path_to_module(module_name) |
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181 return module_name |
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182 end) |
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183 end |
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184 |
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185 --- Return the pathname of the file that would be loaded for a module. |
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186 -- @param module string: module name (eg. "socket.core") |
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187 -- @return string: filename of the module (eg. "/usr/local/lib/lua/5.1/socket/core.so") |
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188 function which(module) |
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189 local name, version, module_name = select_module(module, path.which_i) |
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190 return module_name |
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191 end |
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192 |
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193 --- Package loader for LuaRocks support. |
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194 -- A module is searched in installed rocks that match the |
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195 -- current LuaRocks context. If module is not part of the |
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196 -- context, or if a context has not yet been set, the module |
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197 -- in the package with the highest version is used. |
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198 -- @param module string: The module name, like in plain require(). |
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199 -- @return table: The module table (typically), like in plain |
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200 -- require(). See <a href="http://www.lua.org/manual/5.1/manual.html#pdf-require">require()</a> |
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201 -- in the Lua reference manual for details. |
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202 function luarocks_loader(module) |
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203 local name, version, module_name = pick_module(module) |
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204 if not name then |
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205 return "No LuaRocks module found for "..module |
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206 else |
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207 add_context(name, version) |
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208 return call_other_loaders(module, name, version, module_name) |
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209 end |
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210 end |
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211 |
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212 table.insert(global_env.package.loaders, 1, luarocks_loader) |