From 72d8b4e6bee0ffac79e96dd649a9da2adb86b507 Mon Sep 17 00:00:00 2001
From: name <email@example.com>
Date: Wed, 27 Sep 2023 11:34:23 +0000
Subject: 2023-09-26

---
 rust/wolfree_sed_in_place/src/main.rs | 113 ++++++++++------------------------
 1 file changed, 34 insertions(+), 79 deletions(-)

(limited to 'rust/wolfree_sed_in_place/src/main.rs')

diff --git a/rust/wolfree_sed_in_place/src/main.rs b/rust/wolfree_sed_in_place/src/main.rs
index 7d56889..f20393f 100644
--- a/rust/wolfree_sed_in_place/src/main.rs
+++ b/rust/wolfree_sed_in_place/src/main.rs
@@ -1,17 +1,14 @@
-//! The `wolfree_sed_in_place` crate provides a function for performing in-place replacements of patterns in multiple files using regular expressions.
+/* SPDX-License-Identifier: AGPL-3.0-or-later */
+
+//! This 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.
- */
+#![allow(clippy::question_mark_used)]
 
 use regex::Regex;
+use std::error;
 use std::fs;
 use walkdir::WalkDir;
 
@@ -21,94 +18,52 @@ use walkdir::WalkDir;
 /// 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)
+fn sed(
+    directory_path: &str,
+    pattern: &str,
+    replacement: &str
+) -> Result<(), Box<dyn error::Error>> {
+    // Compile the regular expression pattern.
+    let regex = Regex::new(pattern)?;
+    // Create a directory walker and filter out non-file entries.
+    for entry in 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 {
+        .filter(|entry| !entry.file_type().is_dir()) {
         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);
-            }
-        };
+        // Read the file's contents into a string.
+        // Perform the regex replacement on the file's contents.
+        // Write the modified contents back to the file, overwriting its previous contents.
+        fs::write(file_path, &*regex.replace(&fs::read_to_string(file_path)?, replacement))?;
     }
+    Ok(())
 }
 
 /// 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"),
-    );
+/// Demonstrates using `sed` function to perform in-place replacements on files in specific directories.
+fn main() -> Result<(), Box<dyn error::Error>> {
+    sed("./docusaurus/static/input/", "</head><body>", include_str!("include_str.html"))?;
 
-    wolfree_sed_in_place(
-        "./docusaurus/build/_next/static/chunks/",
+    sed(
+        "./docusaurus/static/_next/static/chunks/",
         r"try(.{0,100}?)generateEncodedJSONFromValue(.*?)unescapeForUrl(.*?)catch(.*?)\{}",
-        include_str!("include_str.tsx"),
-    );
+        include_str!("include_str.js")
+    )?;
 
     // 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/",
+    //     override the hostname
+    sed(
+        "./docusaurus/static/_next/static/chunks/pages/",
         "window.location.hostname",
-        "'www.wolframalpha.com'",
-    );
+        "'www.wolframalpha.com'"
+    )?;
+
+    Ok(())
 }
 
 // regex101: build, test, and debug regex
-- 
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