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-rw-r--r--server/helpers/decache.ts78
1 files changed, 78 insertions, 0 deletions
diff --git a/server/helpers/decache.ts b/server/helpers/decache.ts
new file mode 100644
index 000000000..e31973b7a
--- /dev/null
+++ b/server/helpers/decache.ts
@@ -0,0 +1,78 @@
1// Thanks: https://github.com/dwyl/decache
2// We reuse this file to also uncache plugin base path
3
4import { extname } from 'path'
5
6function decachePlugin (pluginPath: string, libraryPath: string) {
7 const moduleName = find(libraryPath)
8
9 if (!moduleName) return
10
11 searchCache(moduleName, function (mod) {
12 delete require.cache[mod.id]
13 })
14
15 removeCachedPath(pluginPath)
16}
17
18function decacheModule (name: string) {
19 const moduleName = find(name)
20
21 if (!moduleName) return
22
23 searchCache(moduleName, function (mod) {
24 delete require.cache[mod.id]
25 })
26
27 removeCachedPath(moduleName)
28}
29
30// ---------------------------------------------------------------------------
31
32export {
33 decacheModule,
34 decachePlugin
35}
36
37// ---------------------------------------------------------------------------
38
39function find (moduleName: string) {
40 try {
41 return require.resolve(moduleName)
42 } catch {
43 return ''
44 }
45}
46
47function searchCache (moduleName: string, callback: (current: NodeModule) => void) {
48 const resolvedModule = require.resolve(moduleName)
49 let mod: NodeModule
50 const visited = {}
51
52 if (resolvedModule && ((mod = require.cache[resolvedModule]) !== undefined)) {
53 // Recursively go over the results
54 (function run (current) {
55 visited[current.id] = true
56
57 current.children.forEach(function (child) {
58 if (extname(child.filename) !== '.node' && !visited[child.id]) {
59 run(child)
60 }
61 })
62
63 // Call the specified callback providing the
64 // found module
65 callback(current)
66 })(mod)
67 }
68};
69
70function removeCachedPath (pluginPath: string) {
71 const pathCache = (module.constructor as any)._pathCache
72
73 Object.keys(pathCache).forEach(function (cacheKey) {
74 if (cacheKey.includes(pluginPath)) {
75 delete pathCache[cacheKey]
76 }
77 })
78}