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--- Fetch back-end for retrieving sources from HG.
local hg = {}
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 hg.
-- @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 hg.get_sources(rockspec, extract, dest_dir)
assert(type(rockspec) == "table")
assert(type(dest_dir) == "string" or not dest_dir)
local hg_cmd = rockspec.variables.HG
local ok, err_msg = fs.is_tool_available(hg_cmd, "Mercurial")
if not ok then
return nil, err_msg
end
local name_version = rockspec.name .. "-" .. rockspec.version
-- Strip off special hg:// protocol type
local url = rockspec.source.url:gsub("^hg://", "")
local module = dir.base_name(url)
local command = {hg_cmd, "clone", url, module}
local tag_or_branch = rockspec.source.tag or rockspec.source.branch
if tag_or_branch then
command = {hg_cmd, "clone", "--rev", tag_or_branch, url, module}
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 cloning hg repository."
end
ok, err = fs.change_dir(module)
if not ok then return nil, err end
fs.delete(dir.path(store_dir, module, ".hg"))
fs.delete(dir.path(store_dir, module, ".hgignore"))
fs.pop_dir()
fs.pop_dir()
return module, store_dir
end
return hg
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