Fix:Include Watcher as lib with no dependencies and fix tiny-readdir bug #610

server/libs/watcher/atomically/utils/temp.js

@@ -0,0 +1,56 @@
+"use strict";
+/* IMPORT */
+Object.defineProperty(exports, "__esModule", { value: true });
+const path = require("path");
+const consts_1 = require("../consts");
+const fs_1 = require("./fs");
+/* TEMP */
+//TODO: Maybe publish this as a standalone package
+const Temp = {
+    store: {},
+    create: (filePath) => {
+        const randomness = `000000${Math.floor(Math.random() * 16777215).toString(16)}`.slice(-6), // 6 random-enough hex characters
+        timestamp = Date.now().toString().slice(-10), // 10 precise timestamp digits
+        prefix = 'tmp-', suffix = `.${prefix}${timestamp}${randomness}`, tempPath = `${filePath}${suffix}`;
+        return tempPath;
+    },
+    get: (filePath, creator, purge = true) => {
+        const tempPath = Temp.truncate(creator(filePath));
+        if (tempPath in Temp.store)
+            return Temp.get(filePath, creator, purge); // Collision found, try again
+        Temp.store[tempPath] = purge;
+        const disposer = () => delete Temp.store[tempPath];
+        return [tempPath, disposer];
+    },
+    purge: (filePath) => {
+        if (!Temp.store[filePath])
+            return;
+        delete Temp.store[filePath];
+        fs_1.default.unlinkAttempt(filePath);
+    },
+    purgeSync: (filePath) => {
+        if (!Temp.store[filePath])
+            return;
+        delete Temp.store[filePath];
+        fs_1.default.unlinkSyncAttempt(filePath);
+    },
+    purgeSyncAll: () => {
+        for (const filePath in Temp.store) {
+            Temp.purgeSync(filePath);
+        }
+    },
+    truncate: (filePath) => {
+        const basename = path.basename(filePath);
+        if (basename.length <= consts_1.LIMIT_BASENAME_LENGTH)
+            return filePath; //FIXME: Rough and quick attempt at detecting ok lengths
+        const truncable = /^(\.?)(.*?)((?:\.[^.]+)?(?:\.tmp-\d{10}[a-f0-9]{6})?)$/.exec(basename);
+        if (!truncable)
+            return filePath; //FIXME: No truncable part detected, can't really do much without also changing the parent path, which is unsafe, hoping for the best here
+        const truncationLength = basename.length - consts_1.LIMIT_BASENAME_LENGTH;
+        return `${filePath.slice(0, -basename.length)}${truncable[1]}${truncable[2].slice(0, -truncationLength)}${truncable[3]}`; //FIXME: The truncable part might be shorter than needed here
+    }
+};
+/* INIT */
+process.on('exit', Temp.purgeSyncAll); // Ensuring purgeable temp files are purged on exit
+/* EXPORT */
+exports.default = Temp;