3 files changed, 262 insertions, 0 deletions

diff --git a/rust/wolfree_sed_in_place/src/include_str.html b/rust/wolfree_sed_in_place/src/include_str.html
new file mode 100644
index 0000000..2fbe0f4
--- /dev/null
+++ b/rust/wolfree_sed_in_place/src/include_str.html
@@ -0,0 +1,76 @@
+<meta name="referrer" content="no-referrer" />
+
+<script type="module" src="/ajax/libs/jquery/3.7.0/jquery.min.js"></script>
+<script type="module" src="/ajax/libs/dompurify/3.0.5/purify.min.js"></script>
+<script type="module" src="/ajax/libs/wolfree/23.7.8/js/onload.js"></script>
+
+<link rel="preload" as="style" onload="this.onload = null; this.rel = 'stylesheet';"
+    href="/ajax/libs/wolfree/23.7.8/css/Placeholder.css" />
+<link rel="preload" as="style" onload="this.onload = null; this.rel = 'stylesheet';"
+    href="/ajax/libs/wolfree/23.7.8/css/PodsParser.css" />
+
+<style>
+    html>body>#__next>div>header {
+        visibility: hidden;
+        height: 5rem;
+    }
+
+    html>body>#__next>div>footer {
+        visibility: hidden;
+    }
+
+    html>body>#__next>div>main>main>span,
+    html>body>#__next>div>main>main a[href*="/pro/pricing/students/"],
+    html>body>#__next>div>main>main a[href*="/pro/pricing/students/"]~*,
+    html>body>#__next>div>main>main>div>a,
+    html>body>#__next>div>main>main>div>a>img[src*="../_next/static/images/Logo_"][alt*="WolframAlpha computational knowledge AI"],
+    html>body>#__next>div>main>main>div>div>nav>a~button,
+    html>body>#__next>div>main>main>div>div>nav>div>div>ul>li~li~li,
+    /* Derivative[9][y][x] == y[x] */
+    html>body>#__next>div>main>main>div>div>div[class=""],
+    html>body>#__next>div>main>main>div>div>div>section>section> :not(div, ul, header, button),
+    /* Wolfram|Alpha Copyable Plain Text */
+    html>body>#__next>div>main>main>div>div>div>section>section>header>h2> :not(span),
+    html>body>#__next>div>main>main>div>div>div>section>section>div> :not(h2, select, span, div),
+    html>body>#__next>div>main>main>div>div>div>section>section>div>div> :not(img, button, div, a),
+    html>body>#__next>div>main>main a[href*="/pro/pricing/"],
+    html>body>#__next>div>main>main a[href*="/pro/pricing/"]~*,
+    html>body>#__next>div>main>main a[href*="/pro-premium-expert-support"],
+    html>body>#__next>div>main>main a[href*="/pro-premium-expert-support"]~*,
+    /* "isGDPR": true */
+    html>body>#__next>div>section {
+        display: none;
+    }
+
+    html>body>header {
+        position: absolute;
+        width: 100%;
+        z-index: 1;
+    }
+
+    html>body>header>nav {
+        text-align: center;
+        display: flex;
+        max-width: 780px;
+        margin: auto;
+    }
+
+    html>body>header>nav>a {
+        font-family: sans-serif;
+        text-decoration: none;
+        flex: auto;
+        margin: 1rem 0;
+        padding: 1rem 0;
+    }
+</style>
+
+$0
+
+<header>
+    <nav>
+        <a href="../">Wolfree</a>
+        <a href="../mirror">Mirror</a>
+        <a href="../source">Source</a>
+    </nav>
+</header>
+<!-- SPDX-License-Identifier: AGPL-3.0-or-later -->
\ No newline at end of file
diff --git a/rust/wolfree_sed_in_place/src/include_str.tsx b/rust/wolfree_sed_in_place/src/include_str.tsx
new file mode 100644
index 0000000..3c8ff4e
--- /dev/null
+++ b/rust/wolfree_sed_in_place/src/include_str.tsx
@@ -0,0 +1,71 @@
+/**
+ * @license
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ * This file is part of Wolfree.
+ * 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.
+ */
+
+// @ts-check
+
+const wolfreeLexicalScopeName = (() => {
+  const possibleLetters = Array();
+
+  for (let i = 32; i < 127; i++) {
+    possibleLetters.push(String.fromCharCode(i));
+  }
+
+  const possibleNames = possibleLetters.flatMap((x) =>
+    possibleLetters.map((y) => x + y)
+  );
+
+  const isValid = (name = String()) => {
+    try {
+      return (
+        typeof eval(name).value === "string" &&
+        typeof eval(name).i2d === "boolean"
+      );
+    } catch (error) {
+      return false;
+    }
+  };
+
+  const wolfreeLexicalScopeName = possibleNames.find(isValid);
+
+  if (typeof wolfreeLexicalScopeName !== "string") {
+    console.error({ wolfreeLexicalScopeName });
+    return "";
+  }
+
+  return wolfreeLexicalScopeName;
+})();
+
+(() => {
+  const get = (params = String()) => {
+    return new URLSearchParams(location.search).get(params);
+  };
+
+  eval(wolfreeLexicalScopeName).value = get("i") || "topic mathematics";
+  eval(wolfreeLexicalScopeName).i2d = get("i2d") === "true";
+})();
+
+/**
+ * Regex in regex - Rust
+ * https://docs.rs/regex/latest/regex/struct.Regex.html#replacement-string-syntax
+ * All instances of $ref in the replacement string are replaced with the substring corresponding to the capture group identified by ref.
+ * ref may be an integer corresponding to the index of the capture group (counted by order of opening parenthesis where 0 is the entire match) or it can be a name (consisting of letters, digits or underscores) corresponding to a named capture group.
+ */
+// @ts-ignore
+$0;
+
+(async () => {
+  (
+    await import(
+      // @ts-ignore
+      "../../../ajax/libs/wolfree/23.7.8/js/Entrypoint.js"
+    )
+  ).default({
+    input: eval(wolfreeLexicalScopeName).value,
+    i2d: eval(wolfreeLexicalScopeName).i2d,
+    extraPodstates: [],
+  });
+})();
diff --git a/rust/wolfree_sed_in_place/src/main.rs b/rust/wolfree_sed_in_place/src/main.rs
new file mode 100644
index 0000000..7d56889
--- /dev/null
+++ b/rust/wolfree_sed_in_place/src/main.rs
@@ -0,0 +1,115 @@
+//! The `wolfree_sed_in_place` crate provides a function for performing in-place replacements of patterns in multiple files using regular expressions.
+//! It allows you to recursively process all files within a specified directory and replace occurrences of a given pattern with a specified replacement string.
+
+#![allow(clippy::blanket_clippy_restriction_lints)]
+#![allow(clippy::exit)]
+#![allow(clippy::print_stderr)]
+#![allow(clippy::implicit_return)]
+
+/* SPDX-License-Identifier: AGPL-3.0-or-later
+ * This file is part of Wolfree.
+ * 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.
+ */
+
+use regex::Regex;
+use std::fs;
+use walkdir::WalkDir;
+
+/// Perform in-place replacements on files in a given directory, using regular expressions.
+///
+/// This function walks through all the files in the specified `directory_path`,
+/// filters out directories, and applies a regular expression-based replacement
+/// on the contents of each file.
+///
+/// # Arguments
+///
+/// * `directory_path`: A string slice representing the path of the directory to traverse.
+/// * `pattern`: A string slice containing the regular expression pattern to search for.
+/// * `replacement`: A string slice representing the replacement for each matched pattern.
+///
+/// # Examples
+///
+/// ```rust
+/// // Replace a specific pattern in the file contents in the "./data/" directory.
+/// wolfree_sed_in_place("./data/", r"\bFoo\b", "Bar");
+/// ```
+///
+/// This example replaces all occurrences of the word "Foo" with "Bar" in the files inside the "data" directory.
+fn wolfree_sed_in_place(directory_path: &str, pattern: &str, replacement: &str) {
+    // Compile the regular expression pattern
+    let regex = match Regex::new(pattern) {
+        Ok(re) => re,
+        Err(err) => {
+            eprintln!("Error: {err}",);
+            std::process::exit(1);
+        }
+    };
+
+    // Create a directory walker and filter out non-file entries
+    let walker = WalkDir::new(directory_path)
+        .into_iter()
+        .filter_map(Result::ok)
+        .filter(|entry| !entry.file_type().is_dir());
+
+    // Process each file in the directory
+    for entry in walker {
+        let file_path = entry.path();
+
+        // Read the file's contents into a string
+        let file_contents = match fs::read_to_string(file_path) {
+            Ok(contents) => contents,
+            Err(err) => {
+                eprintln!("Error: {err}",);
+                std::process::exit(1);
+            }
+        };
+
+        // Perform the regex replacement on the file's contents
+        let modified_contents = regex.replace(&file_contents, replacement);
+        let modified_contents_as_ref = modified_contents.as_ref();
+
+        // Write the modified contents back to the file, overwriting its previous contents
+        match fs::write(file_path, modified_contents_as_ref) {
+            Ok(_) => (),
+            Err(err) => {
+                eprintln!("Error: {err}",);
+                std::process::exit(1);
+            }
+        };
+    }
+}
+
+/// Entry point of the program.
+/// Demonstrates using `wolfree_sed_in_place` function to perform in-place replacements on files in specific directories.
+fn main() {
+    wolfree_sed_in_place(
+        "./docusaurus/build/input/",
+        "</head><body>",
+        include_str!("include_str.html"),
+    );
+
+    wolfree_sed_in_place(
+        "./docusaurus/build/_next/static/chunks/",
+        r"try(.{0,100}?)generateEncodedJSONFromValue(.*?)unescapeForUrl(.*?)catch(.*?)\{}",
+        include_str!("include_str.tsx"),
+    );
+
+    // console error:
+    //     _app-daabd76ef4fe402d.js:5
+    //     WebSocket connection to 'wss://localhost/n/v1/api/fetcher/results' failed:
+    //     startWebsocket @ _app-daabd76ef4fe402d.js:5
+    //     send           @ _app-daabd76ef4fe402d.js:5
+    //     sendMessage    @ 1695-ae743311a23f8eb5.js:1
+    //     newQuery       @ 1695-ae743311a23f8eb5.js:78
+    //     newQuery       @ 1695-ae743311a23f8eb5.js:78
+    // fix:
+    //     Override the hostname in the minified JavaScript source code.
+    wolfree_sed_in_place(
+        "./docusaurus/build/_next/static/chunks/pages/",
+        "window.location.hostname",
+        "'www.wolframalpha.com'",
+    );
+}
+
+// regex101: build, test, and debug regex
+// https://regex101.com/