kumquat-buildroot/package/luarocks/buildroot.lua

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--- Module implementing the LuaRocks "buildroot" command.
local buildroot = {}
local dir = require("luarocks.dir")
local fs = require("luarocks.fs")
local util = require("luarocks.util")
local queries = require("luarocks.queries")
local search = require("luarocks.search")
local download = require("luarocks.download")
local fetch = require("luarocks.fetch")
function buildroot.add_to_parser(parser)
local cmd = parser:command("buildroot", [[
This addon generates Buildroot package files of a rock.
First argument is the name of a rock, the second argument is optional
and needed when Buildroot uses another name (usually prefixed by lua-).
Files are generated with the source content of the rock and more
especially the rockspec. So, the rock is downloaded and unpacked.
]], util.see_also())
:summary("generate buildroot package files of a rock.")
cmd:argument("rockname", "the name of a rock to be fetched and unpacked.")
cmd:argument("brname", "the name used by Buildroot.")
:args("?")
end
local function brname (name)
return name:upper():gsub('-', '_')
end
local function brlicense (license)
if license:match('MIT/X') then
return 'MIT'
end
return license
end
local function wrap (txt, max)
local lines = {}
local line = ''
for word in txt:gmatch('(%S+)') do
if line:len() + word:len() > max - 1 then
lines[#lines+1] = line
line = ''
end
if line == '' then
line = word
else
line = line .. ' ' .. word
end
end
lines[#lines+1] = line
return lines
end
local function has_c_files (rockspec)
for _, mod in pairs(rockspec.build.modules or {}) do
if type(mod) == 'string' then
if mod:match'%.c$' then
return true
end
elseif type(mod) == 'table' then
local sources = mod.sources
if type(sources) == 'string' and sources:match'%.c$' then
return true
end
for _, src in ipairs(sources or mod) do
if src:match'%.c$' then
return true
end
end
end
end
return false
end
local function get_main_modules (rockspec)
local t = {}
for name in pairs(rockspec.build.modules or {}) do
if not name:match('%.') then
t[#t+1] = name
end
end
if #t == 0 then
for name in pairs(rockspec.build.modules or {}) do
t[#t+1] = name
end
end
if #t == 0 then
t[#t+1] = rockspec.package:gsub('%-', '')
end
table.sort(t)
return t
end
local function get_external_dependencies (rockspec)
local t = {}
for k in pairs(rockspec.external_dependencies or {}) do
k = k:lower()
if fs.is_dir('package/' .. k) then
t[#t+1] = k
else
t[#t+1] = 'lib' .. k
if not fs.is_dir('package/lib' .. k) then
util.printout('unkwown external dependency: ' .. k)
end
end
end
table.sort(t)
return t
end
local function get_dependencies (rockspec)
local t = {}
for i = 1, #rockspec.dependencies do
local dep = tostring(rockspec.dependencies[i]):match('^(%S+)')
if dep ~= 'lua' then
dep = dep:gsub('_', '-')
if fs.is_dir('package/lua-' .. dep) then
t[#t+1] = 'lua-' .. dep
else
t[#t+1] = dep
if not fs.is_dir('package/' .. dep) then
util.printout('unkwown dependency: ' .. dep)
end
end
end
end
table.sort(t)
return t
end
function get_digest (file)
local absname = fs.absolute_name(file)
local pipe = io.popen('sha256sum ' .. fs.Q(absname))
local line = pipe:read('*l')
pipe:close()
local computed = line and line:match('(' .. ('%x'):rep(64) .. ')')
if computed then
return computed
else
return nil, "Failed to compute SHA256 hash for file " .. absname
end
end
local function generate_config (rockspec, lcname)
local ucname = brname(lcname)
local only_luajit = rockspec.package:match('^lj')
local summary = rockspec.description.summary
if not summary then
summary = '???'
elseif not summary:match('%.%s*$') then
summary = summary:gsub('%s*$', '.')
end
local homepage = rockspec.description.homepage or '???'
local external_dependencies = get_external_dependencies(rockspec)
local dependencies = get_dependencies(rockspec)
local fname = 'package/' .. lcname .. '/Config.in'
local f = assert(io.open(fname, 'w'))
util.printout('write ' .. fname)
f:write('config BR2_PACKAGE_' .. ucname .. '\n')
f:write('\tbool "' .. lcname .. '"\n')
if only_luajit then
f:write('\tdepends on BR2_PACKAGE_LUAJIT\n')
end
for i = 1, #external_dependencies do
f:write('\tselect BR2_PACKAGE_' .. brname(external_dependencies[i]) .. '\n')
end
for i = 1, #dependencies do
f:write('\tselect BR2_PACKAGE_' .. brname(dependencies[i]) .. ' # runtime\n')
end
f:write('\thelp\n')
f:write('\t ' .. table.concat(wrap(summary, 62), '\n\t ') .. '\n')
f:write('\n\t ' .. homepage .. '\n')
if only_luajit then
f:write('\ncomment "' .. lcname .. ' needs LuaJIT"\n')
f:write('\tdepends on !BR2_PACKAGE_LUAJIT\n')
end
f:close()
end
local function generate_mk (rockspec, lcname, licenses)
local function escape (s)
return s:gsub('-', '%%-'):gsub('%.', '%%.')
end
local ucname = brname(lcname)
local need_name_upstream = false
local need_version_upstream = false
local name_upstream = rockspec.package
local version = rockspec.version
local version_upstream = version:match('^([^-]+)-')
local revision = version:match('-(%d+)$')
local license = rockspec.description.license
local subdir = rockspec.source.dir
if subdir then
local root = subdir:match('^(.-)-' .. escape(version) .. '$')
if root then
subdir = root .. '-$(' .. ucname .. '_VERSION)'
end
root = subdir:match('^(.--[Vv])' .. escape(version_upstream) .. '$')
if root then
need_version_upstream = true
subdir = root .. '$(' .. ucname .. '_VERSION_UPSTREAM)'
end
root = subdir:match('^(.-)-' .. escape(version_upstream) .. '$')
if root then
if root == lcname then
subdir = nil
elseif root == name_upstream then
subdir = nil
need_name_upstream = true
else
need_version_upstream = true
subdir = root .. '-$(' .. ucname .. '_VERSION_UPSTREAM)'
end
end
end
local external_dependencies = get_external_dependencies(rockspec)
local fname = 'package/' .. lcname .. '/' .. lcname .. '.mk'
local f = assert(io.open(fname, 'w'))
util.printout('write ' .. fname)
f:write('################################################################################\n')
f:write('#\n')
f:write('# ' .. lcname .. '\n')
f:write('#\n')
f:write('################################################################################\n')
f:write('\n')
if need_version_upstream then
f:write(ucname .. '_VERSION_UPSTREAM = ' .. version_upstream .. '\n')
f:write(ucname .. '_VERSION = $(' .. ucname .. '_VERSION_UPSTREAM)-' .. revision .. '\n')
else
f:write(ucname .. '_VERSION = ' .. version .. '\n')
end
if lcname ~= name_upstream:lower() or need_name_upstream then
f:write(ucname .. '_NAME_UPSTREAM = ' .. name_upstream .. '\n')
end
if subdir then
f:write(ucname .. '_SUBDIR = ' .. subdir .. '\n')
end
if license then
f:write(ucname .. '_LICENSE = ' .. brlicense(license) .. '\n')
end
if #licenses == 1 then
f:write(ucname .. '_LICENSE_FILES = $(' .. ucname .. '_SUBDIR)/' .. licenses[1] .. '\n')
elseif #licenses > 1 then
f:write(ucname .. '_LICENSE_FILES =')
for i = 1, #licenses do
local file = licenses[i]
f:write(' \\\n\t$(' .. ucname .. '_SUBDIR)/' .. file)
end
f:write('\n')
end
if #external_dependencies > 0 then
f:write(ucname .. '_DEPENDENCIES = ' .. table.concat(external_dependencies, ' ') .. '\n')
end
f:write('\n$(eval $(luarocks-package))\n')
f:close()
end
local function generate_hash (rockspec, lcname, rock_file, licenses, digest)
local subdir = rockspec.source.dir
local fname = 'package/' .. lcname .. '/' .. lcname .. '.hash'
local f = assert(io.open(fname, 'w'))
util.printout('write ' .. fname)
f:write('# computed by luarocks/buildroot\n')
f:write('sha256 ' .. digest[rock_file] .. ' ' .. rock_file .. '\n')
for i = 1, #licenses do
local file = licenses[i]
f:write('sha256 ' .. digest[file] .. ' ' .. subdir .. '/' .. file .. '\n')
end
f:close()
end
local function generate_test (rockspec, lcname)
local ucname = brname(lcname)
local classname = rockspec.package:gsub('%-', ''):gsub('%.', '')
classname = classname:sub(1, 1):upper() .. classname:sub(2)
local modnames = get_main_modules(rockspec)
local fname = 'support/testing/tests/package/test_' .. ucname:lower() .. '.py'
local f = assert(io.open(fname, 'w'))
util.printout('write ' .. fname)
f:write('from tests.package.test_lua import TestLuaBase\n')
f:write('\n')
f:write('\n')
f:write('class TestLua' .. classname .. '(TestLuaBase):\n')
f:write(' config = TestLuaBase.config + \\\n')
f:write(' """\n')
f:write(' BR2_PACKAGE_LUA=y\n')
f:write(' BR2_PACKAGE_' .. ucname .. '=y\n')
f:write(' """\n')
f:write('\n')
f:write(' def test_run(self):\n')
f:write(' self.login()\n')
for i = 1, #modnames do
f:write(' self.module_test("' .. modnames[i] .. '")\n')
end
f:write('\n')
f:write('\n')
f:write('class TestLuajit' .. classname .. '(TestLuaBase):\n')
f:write(' config = TestLuaBase.config + \\\n')
f:write(' """\n')
f:write(' BR2_PACKAGE_LUAJIT=y\n')
f:write(' BR2_PACKAGE_' .. ucname .. '=y\n')
f:write(' """\n')
f:write('\n')
f:write(' def test_run(self):\n')
f:write(' self.login()\n')
for i = 1, #modnames do
f:write(' self.module_test("' .. modnames[i] .. '")\n')
end
f:close()
end
--- Driver function for the "buildroot" command.
-- @return boolean: true if successful
function buildroot.command(args)
local rockname = assert(args.rockname)
local fsname = args.brname or rockname
local query = queries.new(rockname:lower(), nil, false, 'src')
local url, err = search.find_suitable_rock(query)
if not url then
return nil, "Could not find a result named " .. tostring(query) .. ": " .. err
end
local rock_file = dir.base_name(url)
local temp_dir, err = fs.make_temp_dir(rockname)
if not temp_dir then
return nil, "Failed creating temporary dir: " .. err
end
local ok, err = fs.change_dir(temp_dir)
if not ok then return nil, err end
ok = fs.download(url, rock_file, true)
if not ok then
return nil, "Failed downloading " .. url
end
local digest = {}
digest[rock_file], err = get_digest(rock_file)
if not digest[rock_file] then return nil, err end
ok, err = fs.unzip(rock_file)
if not ok then return nil, err end
local rockspec_file = rock_file:gsub('%.src%.rock$', '.rockspec')
local rockspec, err = fetch.load_rockspec(rockspec_file)
if not rockspec then
return nil, "Error loading rockspec: " .. err
end
if rockspec.source.file then
ok, err = fs.unpack_archive(rockspec.source.file)
if not ok then return nil, err end
end
if rockspec.source.dir ~= '.' then
fs.copy(rockspec.local_abs_filename, rockspec.source.dir, 'read')
end
local build_type = rockspec.build.type
if build_type ~= 'none' and build_type ~= 'builtin' and build_type ~= 'module' then
util.printout('[' .. rockspec.package .. "] build_type '" .. build_type .. "' not supported")
end
local licenses = {}
ok, err = fs.change_dir(rockspec.source.dir)
if not ok then return nil, err end
local files = fs.find()
for i = 1, #files do
local v = files[i]
if v == 'COPYING'
or v == 'COPYRIGHT'
or v:match('^LICENSE') then
licenses[#licenses+1] = v
digest[v], err = get_digest(v)
if not digest[v] then return nil, err end
end
end
if #licenses == 0 then
for i = 1, #files do
local v = files[i]
if v:match('^doc/LICENSE')
or v:match('^doc/license')
or v:match('^doc/us/license') then
licenses[#licenses+1] = v
digest[v], err = get_digest(v)
if not digest[v] then return nil, err end
end
end
end
fs.pop_dir()
table.sort(licenses)
fs.pop_dir()
ok, err = fs.make_dir('package/' .. fsname:lower())
if not ok then return nil, err end
generate_config(rockspec, fsname:lower())
generate_mk(rockspec, fsname:lower(), licenses)
generate_hash(rockspec, fsname:lower(), rock_file, licenses, digest)
if has_c_files(rockspec) then
ok, err = fs.make_dir('support/testing/tests/package')
if not ok then return nil, err end
generate_test(rockspec, fsname:lower())
end
return true
end
return buildroot