75 lines
2.8 KiB
Rust
75 lines
2.8 KiB
Rust
/* SPDX-License-Identifier: AGPL-3.0-or-later */
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//! This crate provides a function for performing in-place replacements of patterns in multiple files using regular expressions.
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//! It allows you to recursively process all files within a specified directory and replace occurrences of a given pattern with a specified replacement string.
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#![allow(clippy::blanket_clippy_restriction_lints)]
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#![allow(clippy::implicit_return)]
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#![allow(clippy::question_mark_used)]
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use regex::Regex;
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use std::error;
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use std::fs;
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use walkdir::WalkDir;
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/// Perform in-place replacements on files in a given directory, using regular expressions.
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///
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/// This function walks through all the files in the specified `directory_path`,
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/// filters out directories, and applies a regular expression-based replacement
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/// on the contents of each file.
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///
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/// * `directory_path`: A string slice representing the path of the directory to traverse.
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/// * `pattern`: A string slice containing the regular expression pattern to search for.
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/// * `replacement`: A string slice representing the replacement for each matched pattern.
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fn sed(
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directory_path: &str,
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pattern: &str,
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replacement: &str
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) -> Result<(), Box<dyn error::Error>> {
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// Compile the regular expression pattern.
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let regex = Regex::new(pattern)?;
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// Create a directory walker and filter out non-file entries.
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for entry in WalkDir::new(directory_path)
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.into_iter()
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.filter_map(Result::ok)
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.filter(|entry| !entry.file_type().is_dir()) {
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let file_path = entry.path();
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// Read the file's contents into a string.
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// Perform the regex replacement on the file's contents.
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// Write the modified contents back to the file, overwriting its previous contents.
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fs::write(file_path, &*regex.replace(&fs::read_to_string(file_path)?, replacement))?;
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}
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Ok(())
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}
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/// Entry point of the program.
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/// Demonstrates using `sed` function to perform in-place replacements on files in specific directories.
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fn main() -> Result<(), Box<dyn error::Error>> {
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sed("./docusaurus/static/input/", "</head><body>", include_str!("include_str.html"))?;
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sed(
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"./docusaurus/static/_next/static/chunks/",
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r"try(.{0,100}?)generateEncodedJSONFromValue(.*?)unescapeForUrl(.*?)catch(.*?)\{}",
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include_str!("include_str.js")
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)?;
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// console error:
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// WebSocket connection to 'wss://localhost/n/v1/api/fetcher/results' failed:
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// fix:
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// override the hostname
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sed(
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"./docusaurus/static/_next/static/chunks/pages/",
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"window.location.hostname",
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"'www.wolframalpha.com'"
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)?;
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// block Wolfram trackers
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// https://wal.wolfram.com/js/3.0.0/wal.js
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sed("./docusaurus/static/input/", "wal.wolfram.com", "data:,//")?;
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Ok(())
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}
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// regex101: build, test, and debug regex
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// https://regex101.com/
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