Mercurial > repo
comparison share/lua/5.2/luarocks/manif_core.lua @ 1132:d137f631bad5
<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
| author | HackBot |
|---|---|
| date | Fri, 14 Dec 2012 22:24:27 +0000 |
| parents | |
| children |
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| 1131:ff65dfb63263 | 1132:d137f631bad5 |
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| 1 | |
| 2 --- Core functions for querying manifest files. | |
| 3 -- This module requires no specific 'fs' functionality. | |
| 4 module("luarocks.manif_core", package.seeall) | |
| 5 | |
| 6 local persist = require("luarocks.persist") | |
| 7 local type_check = require("luarocks.type_check") | |
| 8 local dir = require("luarocks.dir") | |
| 9 local util = require("luarocks.util") | |
| 10 local cfg = require("luarocks.cfg") | |
| 11 local path = require("luarocks.path") | |
| 12 | |
| 13 manifest_cache = {} | |
| 14 | |
| 15 --- Back-end function that actually loads the manifest | |
| 16 -- and stores it in the manifest cache. | |
| 17 -- @param file string: The local filename of the manifest file. | |
| 18 -- @param repo_url string: The repository identifier. | |
| 19 -- @param quick boolean: If given, skips type checking. | |
| 20 function manifest_loader(file, repo_url, quick) | |
| 21 local manifest, err = persist.load_into_table(file) | |
| 22 if not manifest then | |
| 23 return nil, "Failed loading manifest for "..repo_url..": "..err | |
| 24 end | |
| 25 if not quick then | |
| 26 local ok, err = type_check.type_check_manifest(manifest) | |
| 27 if not ok then | |
| 28 return nil, "Error checking manifest: "..err | |
| 29 end | |
| 30 end | |
| 31 | |
| 32 manifest_cache[repo_url] = manifest | |
| 33 return manifest | |
| 34 end | |
| 35 | |
| 36 --- Load a local manifest describing a repository. | |
| 37 -- All functions that use manifest tables assume they were obtained | |
| 38 -- through either this function or load_manifest. | |
| 39 -- @param repo_url string: URL or pathname for the repository. | |
| 40 -- @return table or (nil, string): A table representing the manifest, | |
| 41 -- or nil followed by an error message. | |
| 42 function load_local_manifest(repo_url) | |
| 43 assert(type(repo_url) == "string") | |
| 44 | |
| 45 if manifest_cache[repo_url] then | |
| 46 return manifest_cache[repo_url] | |
| 47 end | |
| 48 | |
| 49 local pathname = dir.path(repo_url, "manifest") | |
| 50 | |
| 51 return manifest_loader(pathname, repo_url, true) | |
| 52 end | |
| 53 | |
| 54 --- Get all versions of a package listed in a manifest file. | |
| 55 -- @param name string: a package name. | |
| 56 -- @param deps_mode string: "one", to use only the currently | |
| 57 -- configured tree; "order" to select trees based on order | |
| 58 -- (use the current tree and all trees below it on the list) | |
| 59 -- or "all", to use all trees. | |
| 60 -- @return table: An array of strings listing installed | |
| 61 -- versions of a package. | |
| 62 function get_versions(name, deps_mode) | |
| 63 assert(type(name) == "string") | |
| 64 assert(type(deps_mode) == "string") | |
| 65 | |
| 66 local manifest = {} | |
| 67 path.map_trees(deps_mode, function(tree) | |
| 68 local loaded = load_local_manifest(path.rocks_dir(tree)) | |
| 69 if loaded then | |
| 70 util.deep_merge(manifest, loaded) | |
| 71 end | |
| 72 end) | |
| 73 | |
| 74 local item = next(manifest) and manifest.repository[name] | |
| 75 if item then | |
| 76 return util.keys(item) | |
| 77 end | |
| 78 return {} | |
| 79 end |