Initial boiler plate project

node_modules/next/dist/build/webpack/plugins/memory-with-gc-cache-plugin.js

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+/*
+This plugin is based on the internal one in webpack but heavily modified to use a different caching heuristic.
+https://github.com/webpack/webpack/blob/853bfda35a0080605c09e1bdeb0103bcb9367a10/lib/cache/MemoryWithGcCachePlugin.js#L15
+
+https://github.com/webpack/webpack/blob/main/LICENSE
+Copyright JS Foundation and other contributors
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+'Software'), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+*/ /*
+The change in this plugin compared to the built-in one in webpack is that this plugin always cleans up after 5 compilations.
+The built-in plugin only cleans up "total modules / max generations".
+The default for max generations is 5, so 1/5th of the modules would be marked for deletion.
+This plugin instead always checks the cache and decreases the time to live of all entries. That way memory is cleaned up earlier.
+*/ "use strict";
+Object.defineProperty(exports, "__esModule", {
+    value: true
+});
+Object.defineProperty(exports, "MemoryWithGcCachePlugin", {
+    enumerable: true,
+    get: function() {
+        return MemoryWithGcCachePlugin;
+    }
+});
+// Used to hook into the memory stage of the webpack caching
+const CACHE_STAGE_MEMORY = -10 // TODO: Somehow webpack.Cache.STAGE_MEMORY doesn't work.
+;
+const PLUGIN_NAME = "NextJsMemoryWithGcCachePlugin";
+class MemoryWithGcCachePlugin {
+    constructor({ maxGenerations }){
+        this.maxGenerations = maxGenerations;
+    }
+    apply(compiler) {
+        const maxGenerations = this.maxGenerations;
+        /**
+     * The memory cache
+     */ const cache = new Map();
+        /**
+     * Cache cleanup implementation
+     */ function decreaseTTLAndEvict() {
+            for (const [identifier, entry] of cache){
+                // Decrease item time to live
+                entry.ttl--;
+                // if ttl is 0 or below, evict entry from the cache
+                if (entry.ttl <= 0) {
+                    cache.delete(identifier);
+                }
+            }
+        }
+        compiler.hooks.afterDone.tap(PLUGIN_NAME, decreaseTTLAndEvict);
+        compiler.cache.hooks.store.tap({
+            name: PLUGIN_NAME,
+            stage: CACHE_STAGE_MEMORY
+        }, (identifier, etag, data)=>{
+            cache.set(identifier, {
+                etag,
+                data,
+                ttl: maxGenerations
+            });
+        });
+        compiler.cache.hooks.get.tap({
+            name: PLUGIN_NAME,
+            stage: CACHE_STAGE_MEMORY
+        }, (identifier, etag, gotHandlers)=>{
+            const cacheEntry = cache.get(identifier);
+            // Item found
+            if (cacheEntry !== undefined) {
+                // When cache entry is hit we reset the counter.
+                cacheEntry.ttl = maxGenerations;
+                // Handles `null` separately as it doesn't have an etag.
+                if (cacheEntry.data === null) {
+                    return null;
+                }
+                return cacheEntry.etag === etag ? cacheEntry.data : null;
+            }
+            // Handle case where other cache does have the identifier, puts it into the memory cache
+            gotHandlers.push((result, callback)=>{
+                cache.set(identifier, {
+                    // Handles `null` separately as it doesn't have an etag.
+                    etag: result === null ? null : etag,
+                    data: result,
+                    ttl: maxGenerations
+                });
+                return callback();
+            });
+            // No item found
+            return undefined;
+        });
+        compiler.cache.hooks.shutdown.tap({
+            name: PLUGIN_NAME,
+            stage: CACHE_STAGE_MEMORY
+        }, ()=>{
+            cache.clear();
+        });
+    }
+}
+
+//# sourceMappingURL=memory-with-gc-cache-plugin.js.map