feat: run cache busting via a separate bin

utils/cache-bust/src/main.rs

@@ -0,0 +1,78 @@
+/*
+ * Copyright (C) 2021  Aravinth Manivannan <realaravinth@batsense.net>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+use std::fs;
+use std::path::Path;
+use std::collections::HashMap;
+
+use cache_buster::{BusterBuilder, CACHE_BUSTER_DATA_FILE, NoHashCategory};
+use serde::{Serialize, Deserialize};
+
+#[derive(Deserialize, Serialize)]
+struct  FileMap {
+    map: HashMap<String, String>,
+  base_dir: String,
+}
+
+fn main() {
+    cache_bust();
+    process_file_map();
+}
+
+fn cache_bust() {
+    //    until APPLICATION_WASM gets added to mime crate
+    //    PR: https://github.com/hyperium/mime/pull/138
+    //    let types = vec![
+    //        mime::IMAGE_PNG,
+    //        mime::IMAGE_SVG,
+    //        mime::IMAGE_JPEG,
+    //        mime::IMAGE_GIF,
+    //        mime::APPLICATION_JAVASCRIPT,
+    //        mime::TEXT_CSS,
+    //    ];
+
+    println!("[*] Cache busting");
+    let no_hash = vec![NoHashCategory::FileExtentions(vec!["wasm"])];
+
+    let config = BusterBuilder::default()
+        .source("../../static/cache/")
+        .result("./../../assets")
+        .no_hash(no_hash)
+        .follow_links(true)
+        .build()
+        .unwrap();
+
+    config.process().unwrap();
+}
+
+fn process_file_map() {
+    let contents = fs::read_to_string(CACHE_BUSTER_DATA_FILE).unwrap();
+    let files: FileMap = serde_json::from_str(&contents).unwrap();
+    let mut map = HashMap::with_capacity(files.map.len()); 
+    for (k, v) in files.map.iter() {
+        map.insert(k.strip_prefix("../.").unwrap().to_owned(),
+        v.strip_prefix("./../.").unwrap().to_owned()
+        );
+    }
+
+    let new_filemap = FileMap{
+        map,
+        base_dir: files.base_dir.strip_prefix("./../.").unwrap().to_owned(),
+    };
+
+    let dest = Path::new("../../").join(CACHE_BUSTER_DATA_FILE);
+    fs::write(&dest, serde_json::to_string(&new_filemap).unwrap()).unwrap();
+}