3rd party libs bootstrap script

bootstrap.lua

#!/usr/bin/env lua

local function sh(fmt, ...)
	local cmd = string.format(fmt, ...)
	return os.execute(cmd)
end

local function sh_or_err(fmt, ...)
	local cmd = string.format(fmt, ...)
	if not os.execute(cmd) then
		errorf("command failed: %s", cmd)
	end
end

local function errorf(fmt, ...)
	error(string.format(fmt, ...), 2)
end

local function printf(fmt, ...)
	print(string.format(fmt, ...))
end

local function remove_project(proj)
	sh_or_err("rm -rf %s", proj.name)
end

local function packkeys(...)
	local t = table.pack(...)
	if #t == 0 then
		return nil
	end

	local out = {}
	for _, v in ipairs(t) do
		out[v] = true
	end
	return out
end

local function unpack_project(proj)
	local sc = proj.strip_components or 1
	sh_or_err("mkdir -p %s", proj.name)
	sh_or_err("tar -xf %s -C %s --strip-components %s", proj.file, proj.name, sc)
end

local function install_project(proj, destdir)
	if not proj.install then
		printf("install instructions for %s weren't found, skipping...", proj.name)
		return
	end
	local cmd = proj.install:gsub("$destdir", destdir)
	if not os.execute(cmd) then
		errorf("failed installing: %s", proj.name)
	end
end

dofile("config.lua")

local destdir = config.destdir
if not destdir:match("^/") then
	destdir = os.getenv("PWD") .. "/" .. destdir
end
local action = arg[1] or "all"

if action == "all" then
	for _, proj in ipairs(config) do
		if sh("[ -d %s ]", proj.name) then
			printf("%s dir found, assuming it was already installed", proj.name)
			goto continue
		end
		printf("%s not found, installing...", proj.name)
		unpack_project(proj)
		install_project(proj, destdir)
		::continue::
	end
elseif action == "reinstall" then
	local targets = packkeys(select(2, ...))
	if not targets then
		error("please specify project(s) to reinstall")
	end
	local projs = {}
	if targets.all then
		projs = config
	else
		for _, p in ipairs(config) do
			if targets[p.name] then
				projs[#projs+1] = p
			end
		end
	end
	if #projs == 0 then
		errorf("none of the targets were found in config.lua")
	end

	for _, proj in ipairs(projs) do
		printf("reinstalling %s...", proj.name)
		remove_project(proj)
		unpack_project(proj)
		install_project(proj, destdir)
	end
end

config.lua

config = {
  {
    name = "cosmo",
    file = "packages/cosmo-74fc80b.tar.gz",
    install = [=====[
      cd cosmo
      mkdir -p $destdir/share/lua/5.2/cosmo
      cp src/cosmo.lua $destdir/share/lua/5.2/
      cp src/cosmo/grammar.lua $destdir/share/lua/5.2/cosmo
      cp src/cosmo/fill.lua $destdir/share/lua/5.2/cosmo
    ]=====],
  },
  {
    name = "lpeg",
    file = "packages/lpeg-0.12p.tar.gz",
    install = [=====[
      cd lpeg
      make linux
      install -Dm755 lpeg.so $destdir/lib/lua/5.2/lpeg.so
    ]=====],
  },
  {
    name = "sdl2",
    file = "packages/SDL2-2.0.0.tar.gz",
    install = [=====[
      cd sdl2
      mkdir build && cd build
      cmake -DRPATH=OFF -DCMAKE_BUILD_TYPE=Release \
        -DCMAKE_INSTALL_PREFIX="" -DSDL_SHARED=OFF ..
      make -j4
      DESTDIR="$destdir" make install
    ]=====],
  },
  {
    name = "lua",
    file = "packages/lua-5.2.2.tar.gz",
    install = [=====[
      cd lua
      make linux
      make install INSTALL_TOP="$destdir"
    ]=====],
  },

  destdir = "local",
}