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--- Module implementing the luarocks "download" command.
-- Download a rock from the repository.
--module("luarocks.download", package.seeall)
local download = {}
package.loaded["luarocks.download"] = download
local util = require("luarocks.util")
local path = require("luarocks.path")
local fetch = require("luarocks.fetch")
local search = require("luarocks.search")
local fs = require("luarocks.fs")
local dir = require("luarocks.dir")
local cfg = require("luarocks.cfg")
download.help_summary = "Download a specific rock file from a rocks server."
download.help_arguments = "[--all] [--arch=<arch> | --source | --rockspec] [<name> [<version>]]"
download.help = [[
--all Download all files if there are multiple matches.
--source Download .src.rock if available.
--rockspec Download .rockspec if available.
--arch=<arch> Download rock for a specific architecture.
]]
local function get_file(filename)
local protocol, pathname = dir.split_url(filename)
if protocol == "file" then
local ok, err = fs.copy(pathname, fs.current_dir(), cfg.perm_read)
if ok then
return pathname
else
return nil, err
end
else
return fetch.fetch_url(filename)
end
end
function download.download(arch, name, version, all)
local query = search.make_query(name, version)
if arch then query.arch = arch end
local search_err
if all then
if name == "" then query.exact_name = false end
local results = search.search_repos(query)
local has_result = false
local all_ok = true
local any_err = ""
for name, result in pairs(results) do
for version, items in pairs(result) do
for _, item in ipairs(items) do
-- Ignore provided rocks.
if item.arch ~= "installed" then
has_result = true
local filename = path.make_url(item.repo, name, version, item.arch)
local ok, err = get_file(filename)
if not ok then
all_ok = false
any_err = any_err .. "\n" .. err
end
end
end
end
end
if has_result then
return all_ok, any_err
end
else
local url
url, search_err = search.find_suitable_rock(query)
if url then
return get_file(url)
end
end
return nil, "Could not find a result named "..name..(version and " "..version or "")..
(search_err and ": "..search_err or ".")
end
--- Driver function for the "download" command.
-- @param name string: a rock name.
-- @param version string or nil: if the name of a package is given, a
-- version may also be passed.
-- @return boolean or (nil, string): true if successful or nil followed
-- by an error message.
function download.run(...)
local flags, name, version = util.parse_flags(...)
assert(type(version) == "string" or not version)
if type(name) ~= "string" and not flags["all"] then
return nil, "Argument missing, see help."
end
if not name then name, version = "", "" end
local arch
if flags["source"] then
arch = "src"
elseif flags["rockspec"] then
arch = "rockspec"
elseif flags["arch"] then
arch = flags["arch"]
end
local dl, err = download.download(arch, name, version, flags["all"])
return dl and true, err
end
return download
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