3 files changed, 84 insertions, 6 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 @@
+// Thanks: https://github.com/dwyl/decache
+// We reuse this file to also uncache plugin base path
+
+import { extname } from 'path'
+
+function decachePlugin (pluginPath: string, libraryPath: string) {
+  const moduleName = find(libraryPath)
+
+  if (!moduleName) return
+
+  searchCache(moduleName, function (mod) {
+    delete require.cache[mod.id]
+  })
+
+  removeCachedPath(pluginPath)
+}
+
+function decacheModule (name: string) {
+  const moduleName = find(name)
+
+  if (!moduleName) return
+
+  searchCache(moduleName, function (mod) {
+    delete require.cache[mod.id]
+  })
+
+  removeCachedPath(moduleName)
+}
+
+// ---------------------------------------------------------------------------
+
+export {
+  decacheModule,
+  decachePlugin
+}
+
+// ---------------------------------------------------------------------------
+
+function find (moduleName: string) {
+  try {
+    return require.resolve(moduleName)
+  } catch {
+    return ''
+  }
+}
+
+function searchCache (moduleName: string, callback: (current: NodeModule) => void) {
+  const resolvedModule = require.resolve(moduleName)
+  let mod: NodeModule
+  const visited = {}
+
+  if (resolvedModule && ((mod = require.cache[resolvedModule]) !== undefined)) {
+    // Recursively go over the results
+    (function run (current) {
+      visited[current.id] = true
+
+      current.children.forEach(function (child) {
+        if (extname(child.filename) !== '.node' && !visited[child.id]) {
+          run(child)
+        }
+      })
+
+      // Call the specified callback providing the
+      // found module
+      callback(current)
+    })(mod)
+  }
+};
+
+function removeCachedPath (pluginPath: string) {
+  const pathCache = (module.constructor as any)._pathCache
+
+  Object.keys(pathCache).forEach(function (cacheKey) {
+    if (cacheKey.includes(pluginPath)) {
+      delete pathCache[cacheKey]
+    }
+  })
+}
diff --git a/server/initializers/config.ts b/server/initializers/config.ts
index dadda2a77..f3a7c6b6b 100644
--- a/server/initializers/config.ts
+++ b/server/initializers/config.ts
@@ -1,7 +1,7 @@
 import bytes from 'bytes'
 import { IConfig } from 'config'
-import decache from 'decache'
 import { dirname, join } from 'path'
+import { decacheModule } from '@server/helpers/decache'
 import { VideoRedundancyConfigFilter } from '@shared/models/redundancy/video-redundancy-config-filter.type'
 import { BroadcastMessageLevel } from '@shared/models/server'
 import { VideosRedundancyStrategy } from '../../shared/models'
@@ -497,7 +497,7 @@ export function reloadConfig () {
       delete require.cache[fileName]
     }
 
-    decache('config')
+    decacheModule('config')
   }
 
   purge()
diff --git a/server/lib/plugins/plugin-manager.ts b/server/lib/plugins/plugin-manager.ts
index d4d2a7edc..8add72a85 100644
--- a/server/lib/plugins/plugin-manager.ts
+++ b/server/lib/plugins/plugin-manager.ts
@@ -1,8 +1,8 @@
-import decache from 'decache'
 import express from 'express'
 import { createReadStream, createWriteStream } from 'fs'
 import { ensureDir, outputFile, readJSON } from 'fs-extra'
 import { basename, join } from 'path'
+import { decachePlugin } from '@server/helpers/decache'
 import { MOAuthTokenUser, MUser } from '@server/types/models'
 import { getCompleteLocale } from '@shared/core-utils'
 import { ClientScript, PluginPackageJson, PluginTranslation, PluginTranslationPaths, RegisterServerHookOptions } from '@shared/models'
@@ -312,12 +312,12 @@ export class PluginManager implements ServerHook {
       logger.error('Cannot install plugin %s, removing it...', toInstall, { err: rootErr })
 
       try {
-        await this.uninstall(npmName)
+        // await this.uninstall(npmName)
       } catch (err) {
         logger.error('Cannot uninstall plugin %s after failed installation.', toInstall, { err })
 
         try {
-          await removeNpmPlugin(npmName)
+          // await removeNpmPlugin(npmName)
         } catch (err) {
           logger.error('Cannot remove plugin %s after failed installation.', toInstall, { err })
         }
@@ -420,7 +420,7 @@ export class PluginManager implements ServerHook {
 
     // Delete cache if needed
     const modulePath = join(pluginPath, packageJSON.library)
-    decache(modulePath)
+    decachePlugin(pluginPath, modulePath)
     const library: PluginLibrary = require(modulePath)
 
     if (!isLibraryCodeValid(library)) {