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-- rsync Plugin
--
-- This plugin is part of Trove. Trove is Codethink's Baserock central server
-- and uses Gitano as the Git service. This plugin adds support to Trove for
-- supporting 'rsync' as a command in Gitano. This means that every repository
-- has an rsync tree attached to it which can be used by remote ends sshing
-- into the Trove.
--
-- Since the functionality is generically useful however, it is supported here
-- in Gitano upstream.
--
-- Copyright 2014 Daniel Silverstone <daniel.silverstone@codethink.co.uk>
local gitano = require "gitano"
local sp = require "luxio.subprocess"
local rsync_short_help = "An rsync endpoint within Gitano"
local rsync_helptext = [[
Users are not expected to use this command directly, but instead to
instruct their local rsync to use a remote of user@gitanohost:reponame
when pushing or pulling rsync content.
]]
local function rsync_detect_repo(config, cmdline)
local repo, msg
local repopath = cmdline[#cmdline]
if #cmdline < 4 then
-- Validate will fail with a nice error, give up now
return nil, cmdline
end
if repopath:match("^/") then
repopath = repopath:sub(2)
end
local origpath = repopath
-- Basically, while there's still something to the repopath
-- and we've not yet found a repo, strip an element and try again...
while (not repo or repo.is_nascent) and repopath ~= ""do
gitano.log.error("Trying " .. repopath)
repo, msg = gitano.repository.find(config, repopath)
if not repo or repo.is_nascent then
repopath = repopath:match("^(.*)/[^/]*$") or ""
end
end
if not repo then
gitano.log.error("Unable to find a repository for " .. cmdline[#cmdline])
return nil, nil
end
if repo.is_nascent then
gitano.log.error("Repository " .. repo.name .. " is nascent")
gitano.log.error("Cannot use rsync command with nascent repositories")
return nil, nil
end
-- Okay, so repopath represented a repository, let's convert the path
-- into something which we can work with...
cmdline[#cmdline] = repo:fs_path() .. "/rsync" .. origpath:sub(#repopath+1)
if origpath:match("/$") and not (cmdline[#cmdline]):match("/$") then
cmdline[#cmdline] = cmdline[#cmdline] .. "/"
end
gitano.util.mkdir_p(repo:fs_path() .. "/rsync")
-- And give back the repo for ruleset running and the cmdline for the rsync
return repo, cmdline
end
local function rsync_validate(config, repo, cmdline)
if #cmdline < 4 then
gitano.log.error("usage: rsync --server <rsync arguments> . <server-side-path>")
return false
end
if cmdline[2] ~= "--server" then
gitano.log.error("Second cmdline element must always be --server")
return false
end
return true
end
local function rsync_prep(config, repo, cmdline, context)
if cmdline[3] == "--sender" then
context.operation = "read"
else
context.operation = "write"
end
return repo:run_lace(context)
end
local function rsync_run(config, repo, cmdline, env)
local cmdcopy = {env=env}
for i = 1, #cmdline do cmdcopy[i] = cmdline[i] end
local proc = sp.spawn(cmdcopy)
return proc:wait()
end
assert(gitano.command.register("rsync",
rsync_short_help, rsync_helptext,
rsync_validate, rsync_prep, rsync_run,
true, true, false,
rsync_detect_repo))
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