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--- Module implementing the luarocks "download" command.
-- Download a rock from the repository.
module("luarocks.download", package.seeall)
local util = require("luarocks.util")
local path = require("luarocks.path")
local fetch = require("luarocks.fetch")
local search = require("luarocks.search")
help_summary = "Download a specific rock file from a rocks server."
help_arguments = "[--all] [--arch=<arch> | --source | --rockspec] [<name> [<version>]]"
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 download(rock_file)
local rock = fetch.fetch_url(rock_file)
return rock ~= nil
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 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 query = search.make_query(name, version)
if flags["source"] then
query.arch = "src"
elseif flags["rockspec"] then
query.arch = "rockspec"
elseif flags["arch"] then
query.arch = flags["arch"]
end
local results, err
if flags["all"] then
if name == "" then query.exact_name = false end
results, err = search.search_repos(query)
else
results, err = search.find_suitable_rock(query)
end
if type(results) == "string" then
return download(results)
elseif type(results) == "table" and next(results) then
if flags["all"] then
local all_ok = true
local any_err = ""
for name, result in pairs(results) do
for version, versions in pairs(result) do
for _,items in pairs(versions) do
local filename = path.make_url(items.repo, name, version, items.arch)
local ok, err = download(filename)
if not ok then
all_ok = false
any_err = any_err .. "\n" .. err
end
end
end
end
return all_ok, any_err
else
util.printerr("Multiple search results were returned.")
util.printout()
util.printout("Search results:")
util.printout("---------------")
search.print_results(results)
return nil, "Please narrow your query or use --all."
end
else
return nil, "Could not find a result named "..name..(version and " "..version or "").."."
end
end
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