2026-11-02 13:58:45 +01:00

44 lines
1.5 KiB
Clojure

;; This Source Code Form is subject to the terms of the Mozilla Public
;; License, v. 2.0. If a copy of the MPL was not distributed with this
;; file, You can obtain one at http://mozilla.org/MPL/2.0/.
;;
;; Copyright (c) KALEIDOS SUBSIDIARY SL
(ns benches.render-wasm.node.files
"Filesystem paths and storage for benchmark artifacts."
(:require
["fs" :as fs]
["path" :as path]
[clojure.string :as str]))
(defn contained?
"True when `file` is `root` or a path below it."
[root file]
(let [relative (path/relative root file)]
(and (not (path/isAbsolute relative))
(not= relative "..")
(not (str/starts-with? relative (str ".." path/sep))))))
(defn get-real-path
"Resolves symlink ancestors even when the final path does not exist yet."
[file]
(let [file (path/resolve file)]
(if (fs/existsSync file)
(fs/realpathSync file)
(path/join (get-real-path (path/dirname file)) (path/basename file)))))
(defn atomic-write
"Writes (UTF-8) content to a temporary file and renames it over `file`,
so readers see either the previous complete file or the new one. The parent
directory must exist.
A failed write or rename leaves the previous file untouched and removes the
temporary file."
[file content]
(let [temporary (str file "." (random-uuid) ".tmp")]
(try
(fs/writeFileSync temporary content #js {:encoding "utf8" :flag "wx"})
(fs/renameSync temporary file)
(finally
(fs/rmSync temporary #js {:force true})))))