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/* 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.
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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.
#![ allow(clippy::blanket_clippy_restriction_lints) ]
#![ 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 ;
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.
///
/// * `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.
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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 )
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. into_iter ( )
. 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.
// 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 ) ) ? ;
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}
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Ok ( ( ) )
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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.
fn main ( ) -> Result < ( ) , Box < dyn error ::Error > > {
sed ( " ./docusaurus/static/input/ " , " </head><body> " , include_str! ( " include_str.html " ) ) ? ;
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sed (
" ./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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// console error:
// WebSocket connection to 'wss://localhost/n/v1/api/fetcher/results' failed:
// fix:
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// override the hostname
sed (
" ./docusaurus/static/_next/static/chunks/pages/ " ,
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" window.location.hostname " ,
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" 'www.wolframalpha.com' "
) ? ;
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// block Wolfram trackers
// https://wal.wolfram.com/js/3.0.0/wal.js
sed ( " ./docusaurus/static/input/ " , " wal.wolfram.com " , " data:,// " ) ? ;
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Ok ( ( ) )
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}
// regex101: build, test, and debug regex
// https://regex101.com/
