7 files changed, 142 insertions, 12 deletions
diff --git a/script/vm/init.lua b/script/vm/init.lua
index 3a42fb9c..f0bbb032 100644
--- a/script/vm/init.lua
+++ b/script/vm/init.lua
@@ -1,5 +1,5 @@
 local vm = require 'vm.vm'
-require 'vm.compiler'
+require 'vm.node'
 require 'vm.getGlobals'
 require 'vm.getDocs'
 require 'vm.getLibrary'
diff --git a/script/vm/object/class.lua b/script/vm/node/class.lua
index 2e6e6094..ee8b1ca8 100644
--- a/script/vm/object/class.lua
+++ b/script/vm/node/class.lua
@@ -1,8 +1,9 @@
----@class vm.object.class
+---@class vm.node.class
 local mt = {}
 mt.__index = mt
+mt.type = 'class'
 
----@return vm.object.class
+---@return vm.node.class
 return function ()
     local class = setmetatable({
     }, mt)
diff --git a/script/vm/node/compiler.lua b/script/vm/node/compiler.lua
new file mode 100644
index 00000000..2663291c
--- /dev/null
+++ b/script/vm/node/compiler.lua
@@ -0,0 +1,56 @@
+local guide  = require 'guide'
+local util   = require 'utility'
+local state  = require 'vm.state'
+
+---@class parser.guide.object
+---@field _compiledGlobals      boolean
+---@field _initedNodes          boolean
+---@field _compiled             any
+
+---@class vm.node.compiler
+local m = {}
+
+---@class vm.node.unknown
+m.UNKNOWN = { type = 'unknown' }
+
+local compilerMap = util.switch()
+    : case 'setglobal'
+    : call(function (uri, source)
+        state.declareGlobal(source[1], uri, source)
+    end)
+    : call(function (uri, source)
+        local global = state.getGlobal(source[1])
+        global:addGet(uri, source)
+    end)
+
+---@param uri    uri
+---@param source parser.guide.object
+function m.compileNode(uri, source)
+    if source._compiled then
+        return
+    end
+    source._compiled = m.UNKNOWN
+    local compiler = compilerMap[source.type]
+    if compiler then
+        compiler(uri, source)
+    end
+end
+
+---编译全局变量的node
+---@param  root parser.guide.object
+function m.compileGlobals(root)
+    if root._initedNodes then
+        return
+    end
+    if root._compiledGlobals then
+        return
+    end
+    root._compiledGlobals = true
+    local uri = guide.getUri(root)
+    local env = guide.getENV(root)
+    for _, ref in ipairs(env.refs) do
+        m.compileNode(uri, ref)
+    end
+end
+
+return m
diff --git a/script/vm/node/global.lua b/script/vm/node/global.lua
new file mode 100644
index 00000000..07fff2d3
--- /dev/null
+++ b/script/vm/node/global.lua
@@ -0,0 +1,36 @@
+local util = require 'utility'
+
+---@class vm.node.global
+---@field links table<uri, { gets: table, sets: table }>
+local mt = {}
+mt.__index = mt
+mt.type = 'global'
+mt.name = ''
+
+function mt:addSet(uri, source)
+    local link = self.links[uri]
+    link.sets[#link.sets+1] = source
+end
+
+function mt:addGet(uri, source)
+    local link = self.links[uri]
+    link.gets[#link.gets+1] = source
+end
+
+function mt:dropUri(uri)
+    self.links[uri] = nil
+end
+
+---@return vm.node.global
+return function (name)
+    local global = setmetatable({
+        name  = name,
+        links = util.defaultTable(function ()
+            return {
+                sets = {},
+                gets = {},
+            }
+        end),
+    }, mt)
+    return global
+end
diff --git a/script/vm/compiler.lua b/script/vm/node/init.lua
index 51fc5962..524dab4e 100644
--- a/script/vm/compiler.lua
+++ b/script/vm/node/init.lua
@@ -1,12 +1,11 @@
-local files = require 'files'
-
----@class vm.compiler
-local m = {}
+local files    = require 'files'
+local compiler = require 'vm.node.compiler'
+local vmState  = require 'vm.state'
 
 for uri in files.eachFile() do
     local state = files.getState(uri)
     if state then
-        --m.compileGlobalNodes(state.ast)
+        compiler.compileGlobals(state.ast)
     end
 end
 
@@ -14,12 +13,10 @@ files.watch(function (ev, uri)
     if ev == 'update' then
         local state = files.getState(uri)
         if state then
-            --m.compileGlobalNodes(state.ast)
+            compiler.compileGlobals(state.ast)
         end
     end
     if ev == 'remove' then
-        --collector:dropUri(uri)
+        vmState.dropUri(uri)
     end
 end)
-
-return m
diff --git a/script/vm/object/init.lua b/script/vm/object/init.lua
deleted file mode 100644
index e69de29b..00000000
--- a/script/vm/object/init.lua
+++ /dev/null
diff --git a/script/vm/state.lua b/script/vm/state.lua
new file mode 100644
index 00000000..ba0b6665
--- /dev/null
+++ b/script/vm/state.lua
@@ -0,0 +1,40 @@
+local util   = require 'utility'
+local guide  = require 'parser.guide'
+local global = require 'vm.node.global'
+
+---@class vm.state
+local m = {}
+---@type table<string, vm.node.global>
+m.globals = util.defaultTable(global)
+---@type table<uri, { globals: table }>
+m.subscriptions = util.defaultTable(function ()
+    return {
+        globals = {},
+    }
+end)
+
+---@return vm.node.global
+function m.declareGlobal(name, uri, source)
+    m.subscriptions[uri].globals[name] = true
+    local node = m.globals[name]
+    node:addSet(uri, source)
+    return node
+end
+
+---@return vm.node.global
+function m.getGlobal(name, uri)
+    if uri then
+        m.subscriptions[uri].globals[name] = true
+    end
+    return m.globals[name]
+end
+
+function m.dropUri(uri)
+    local subscription = m.subscriptions[uri]
+    m.subscriptions[uri] = nil
+    for name in pairs(subscription) do
+        m.globals[name]:dropUri(uri)
+    end
+end
+
+return m