--- Fetch back-end for retrieving sources from Git repositories
-- that use ssh:// transport. For example, for fetching a repository
-- that requires the following command line:
-- `git clone ssh://git@example.com/path/foo.git
-- you can use this in the rockspec:
-- source = { url = "git+ssh://git@example.com/path/foo.git" }
-- It also handles scp-style ssh urls: git@example.com:path/foo.git,
-- but you have to prepend the "git+ssh://" and why not use the "newer"
-- style anyway?
local git_ssh = {}

local git = require("luarocks.fetch.git")

--- Fetch sources for building a rock from a local Git repository.
-- @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 git_ssh.get_sources(rockspec, extract, dest_dir)
   rockspec.source.url = rockspec.source.url:gsub("^git.", "")

   -- Handle old-style scp-like git ssh urls
   if rockspec.source.url:match("^ssh://[^/]+:[^%d]") then
      rockspec.source.url = rockspec.source.url:gsub("^ssh://", "")
   end

   return git.get_sources(rockspec, extract, dest_dir, "--")
end

return git_ssh