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--- Fetch back-end for retrieving sources from CVS.
local cvs = {}
local unpack = unpack or table.unpack
local fs = require("luarocks.fs")
local dir = require("luarocks.dir")
local util = require("luarocks.util")
--- Download sources for building a rock, using CVS.
-- @param rockspec table: The rockspec table
-- @param extract boolean: Unused in this module (required for API purposes.)
-- @param dest_dir string or nil: If set, will extract to the given directory.
-- @return (string, string) or (nil, string): The absolute pathname of
-- the fetched source tarball and the temporary directory created to
-- store it; or nil and an error message.
function cvs.get_sources(rockspec, extract, dest_dir)
assert(rockspec:type() == "rockspec")
assert(type(dest_dir) == "string" or not dest_dir)
local cvs_cmd = rockspec.variables.CVS
local ok, err_msg = fs.is_tool_available(cvs_cmd, "CVS")
if not ok then
return nil, err_msg
end
local name_version = rockspec.name .. "-" .. rockspec.version
local module = rockspec.source.module or dir.base_name(rockspec.source.url)
local command = {cvs_cmd, "-d"..rockspec.source.pathname, "export", module}
if rockspec.source.tag then
table.insert(command, 4, "-r")
table.insert(command, 5, rockspec.source.tag)
end
local store_dir
if not dest_dir then
store_dir = fs.make_temp_dir(name_version)
if not store_dir then
return nil, "Failed creating temporary directory."
end
util.schedule_function(fs.delete, store_dir)
else
store_dir = dest_dir
end
local ok, err = fs.change_dir(store_dir)
if not ok then return nil, err end
if not fs.execute(unpack(command)) then
return nil, "Failed fetching files from CVS."
end
fs.pop_dir()
return module, store_dir
end
return cvs
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