Merge pull request #278 from runk/fix-database-update

Fix database update
runk · Mar 10, 2020 · a1bd9f9 · a1bd9f9
2 parents 3b29edd + 5e7f7f9
commit a1bd9f9
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diff --git a/src/fs.ts b/src/fs.ts
@@ -2,6 +2,7 @@ import fs from 'fs';
 import util from 'util';
 
 export default {
+  existsSync: fs.existsSync,
   readFile: util.promisify(fs.readFile),
   readFileSync: fs.readFileSync,
   watch: fs.watch,

diff --git a/src/index.ts b/src/index.ts
@@ -45,6 +45,11 @@ export const open = async <T>(
     };
 
     fs.watch(filepath, watcherOptions, async () => {
+      // When database file is being replaced,
+      // it could be removed for a fraction of a second.
+      if (!fs.existsSync(filepath)) {
+        return;
+      }
       const updateDatabase = await fs.readFile(filepath);
       reader.load(updateDatabase, opts);
       if (opts.watchForUpdatesHook) {