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local guide = require 'parser.guide'
local vm = require 'vm.vm'
local function getLinks(root)
local cache = {}
local ok
guide.eachSpecialOf(root, 'require', function (source)
local call = source.parent
if call.type == 'call' then
local uris = vm.getLinkUris(call)
if uris then
ok = true
for i = 1, #uris do
local uri = uris[i]
if not cache[uri] then
cache[uri] = {}
end
cache[uri][#cache[uri]+1] = call
end
end
end
end)
if not ok then
return nil
end
return cache
end
function vm.getLinks(source)
source = guide.getRoot(source)
local cache = vm.cache.getLinks[source]
if cache ~= nil then
return cache
end
local unlock = vm.lock('getLinks', source)
if not unlock then
return nil
end
local clock = os.clock()
cache = getLinks(source) or false
local passed = os.clock() - clock
if passed > 0.1 then
log.warn(('getLinks takes [%.3f] sec!'):format(passed))
end
vm.cache.getLinks[source] = cache
unlock()
return cache
end
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