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62 lines
2.1 KiB
Clojure
62 lines
2.1 KiB
Clojure
;; This Source Code Form is subject to the terms of the Mozilla Public
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;; License, v. 2.0. If a copy of the MPL was not distributed with this
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;; file, You can obtain one at http://mozilla.org/MPL/2.0/.
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;;
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;; Copyright (c) KALEIDOS SUBSIDIARY SL
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(ns benches.render-wasm.node.files
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"Filesystem paths and storage for benchmark artifacts."
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(:require
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["fs" :as fs]
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["path" :as path]
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[clojure.string :as str]))
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(defn valid-id?
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"True for IDs of up to 128 letters, digits, underscores or hyphens,
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starting with a letter or digit."
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[id]
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(and (string? id)
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(boolean (re-matches #"[A-Za-z0-9][A-Za-z0-9_-]{0,127}" id))))
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(defn contained?
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"True when `file` is `root` or a path below it."
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[root file]
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(let [relative (path/relative root file)]
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(and (not (path/isAbsolute relative))
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(not= relative "..")
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(not (str/starts-with? relative (str ".." path/sep))))))
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(defn create-home
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"Creates `dir` and its parents, reserves an empty log, and returns the
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directory, log path and record path. `stem` names the .log and .transit files."
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[dir stem]
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(let [log-path (path/join dir (str stem ".log"))]
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(fs/mkdirSync dir #js {:recursive true})
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(fs/writeFileSync log-path "" #js {:encoding "utf8" :flag "wx"})
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{:dir dir
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:log-path log-path
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:record-path (path/join dir (str stem ".transit"))}))
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(defn get-real-path
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"Resolves symlink ancestors even when the final path does not exist yet."
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[file]
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(let [file (path/resolve file)]
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(if (fs/existsSync file)
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(fs/realpathSync file)
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(path/join (get-real-path (path/dirname file)) (path/basename file)))))
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(defn atomic-write
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"Writes (UTF-8) content to a temporary file and renames it over `file`,
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so readers see either the previous complete file or the new one. The parent
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directory must exist.
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A failed write or rename leaves the previous file untouched and removes the
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temporary file."
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[file content]
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(let [temporary (str file "." (random-uuid) ".tmp")]
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(try
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(fs/writeFileSync temporary content #js {:encoding "utf8" :flag "wx"})
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(fs/renameSync temporary file)
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(finally
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(fs/rmSync temporary #js {:force true})))))
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