Script to convert LuaRocks to Arch Linux PKGBUILDs

rock_to_PKGBUILD.lua

#!/usr/bin/env lua

local rockspec_name = assert(arg[1])

local function log(level, fmt, ...)
	io.stderr:write(level .. "\t" .. string.format(fmt, ...) .. "\n")
end

local function append(tbl, ...)
	for _, v in ipairs {...} do
		tbl[#tbl+1] = v
	end
	return tbl
end

local function shell_single_quote(str)
	str = "'" .. str:gsub("'", "'\\''") .. "'"
	return str
end

local function shell_quote(str)
	if str:match("[^%w%_%:%/%@%^%.%-]") then
		str = shell_single_quote(str)
	end
	return str
end
local q = shell_quote

local function load_rockspec(path)
	local env = {}
	local rockspec = assert(loadfile(path, "t", env))
	rockspec()
	return env
end

local config = load_rockspec(rockspec_name)
local PKGBUILD = {}
local function add_var(name, value)
	if type(value) == "string" then
		append(PKGBUILD, name .. "=" .. shell_quote(value))
	elseif type(value) == "table" then
		if next(value) == nil then
			-- Do nothing
		elseif value[1] then -- Array
			local t = {}
			for i,v in ipairs(value) do
				t[i] = shell_quote(v)
			end
			append(PKGBUILD, name .. "=(" .. table.concat(t, " ") .. ")")
		else
			error("Unable to serialise table" .. name)
		end
	else
		log("warn", name .. " is not a string: ", value)
	end
end
add_var("pkgname", config.package)
add_var("pkgver", config.version:gsub("%-","_"))
add_var("pkgrel", "0")
add_var("pkgdesc", config.description.summary)
add_var("arch", {"any"})
add_var("url", config.description.homepage)
add_var("license", {(config.description.license:gsub("^MIT/X11$","MIT"))})
do
	local depends = { "luarocks" }
	for _, d in ipairs(config.dependencies or {}) do
		-- PKGBUILD dependencies can't have whitespace
		d = d:gsub("%s+","")
		append(depends, d)
	end
	for d in pairs(config.external_dependencies or {}) do
		-- take a wild guess at the package name by lower casing and swapping _ for -
		d = d:gsub("%s+","")
		d = d:lower()
		d = d:gsub("_","-")
		append(depends, d)
	end
	add_var("depends", depends)
end

local url = config.source.url
add_var("source", {rockspec_name, url})
local md5 = config.source.md5
--[[if md5 == nil then
	log("info", "No md5 sum found in rockspec downloading source to calculate it")
	--md5 = io.popen("curl -Ls " .. shell_quote(url) .." | md5sum -b"):read"*l":match"%x+"
	md5 = "SKIP"
end]]
log("debug", "Calculating md5 for rockspec")
local rockspec_md5 = io.popen("md5sum " .. shell_quote(rockspec_name)):read"*l":match"%x+"
add_var("md5sums", {rockspec_md5, md5 or "SKIP"})

add_var("install", "rock.install")
local source_dir = config.source.dir or config.source.url:match("([^/.]+)%.?[^/]*$")
table.insert(PKGBUILD, [[
build() {
	cd ]] .. q(source_dir) .. [[;
	luarocks make --pack-binary-rock --deps-mode=none "${srcdir}"/]] .. q(rockspec_name) .. [[;
}
package() {
	cd ]] .. q(source_dir) .. [[;
	luarocks --tree="${pkgdir}/usr" install --deps-mode=none --no-manifest ]] .. q(config.package.."-"..config.version) .. [[.*.rock
}]])
print(table.concat(PKGBUILD, "\n"))

Hey @daurnimator is this post_install() hook system still how rocks should be packaged? I know you've messed with Lua packaging recently and I'm having trouble because my systems are ending up without manifest files so luarocks list for example reports bad info.

Hey @daurnimator is this post_install() hook system still how rocks should be packaged? I know you've messed with Lua packaging recently and I'm having trouble because my systems are ending up without manifest files so luarocks list for example reports bad info.

@alerque It was never really 100% finished. I was adding more capabilities to luarocks at the time to fix some deficiencies.

Nevermind if this whole bag of tricks is finished, I'm mostly just asking about the current total lack of manifests for any Lua rocks.

• Should I look into adding a custom package hook on my system to generate them on package updates
• Should something like that be contributed upstream?
• Or should all individual packages include something like this?
• Or am I completely barking up up the wrong tree expecting luarocks list to work at all?

I've added a post-hook to the luarocks package now; should work going forward for packages that include manifests.

I see that, looks great, thanks for the news!