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2026-01-01 20:42:59 +00:00
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381
scripts/license-enforcer/Cargo.lock generated Normal file
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15
scripts/license-enforcer/Cargo.toml Normal file
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[package]
name = "license-enforcer"
version = "0.1.0"
edition = "2024"
[dependencies]
walkdir = "2.4"
regex = "1.10"
chrono = "0.4"
[profile.release]
lto = true
panic = "abort"
codegen-units = 1
opt-level = "z"

426
scripts/license-enforcer/src/main.rs Normal file
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#![allow(clippy::four_forward_slashes)]
/*
* Copyright (C) 2026 Fluxer Contributors
*
* This file is part of Fluxer.
*
* Fluxer 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.
*
* Fluxer is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with Fluxer. If not, see <https://www.gnu.org/licenses/>.
*/
use regex::Regex;
use std::fs;
use std::io::{BufRead, BufReader};
use std::path::{Path, PathBuf};
use walkdir::WalkDir;
const TS_LICENSE_HEADER: &str = r"/*
* Copyright (C) {year} Fluxer Contributors
*
* This file is part of Fluxer.
*
* Fluxer 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.
*
* Fluxer is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with Fluxer. If not, see <https://www.gnu.org/licenses/>.
*/";
const ERLANG_LICENSE_HEADER: &str = r"%% Copyright (C) {year} Fluxer Contributors
%%
%% This file is part of Fluxer.
%%
%% Fluxer 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.
%%
%% Fluxer is distributed in the hope that it will be useful,
%% but WITHOUT ANY WARRANTY; without even the implied warranty of
%% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
%% GNU Affero General Public License for more details.
%%
%% You should have received a copy of the GNU Affero General Public License
%% along with Fluxer. If not, see <https://www.gnu.org/licenses/>.";
const GLEAM_LICENSE_HEADER: &str = r"//// Copyright (C) {year} Fluxer Contributors
////
//// This file is part of Fluxer.
////
//// Fluxer 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.
////
//// Fluxer is distributed in the hope that it will be useful,
//// but WITHOUT ANY WARRANTY; without even the implied warranty of
//// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
//// GNU Affero General Public License for more details.
////
//// You should have received a copy of the GNU Affero General Public License
//// along with Fluxer. If not, see <https://www.gnu.org/licenses/>.";
const SHELL_LICENSE_HEADER: &str = r"# Copyright (C) {year} Fluxer Contributors
#
# This file is part of Fluxer.
#
# Fluxer 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.
#
# Fluxer is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with Fluxer. If not, see <https://www.gnu.org/licenses/>.";
const BLOCK_COMMENT_EXTS: &[&str] = &[
"ts", "tsx", "js", "jsx", "mjs", "cjs", "css", "go", "rs", "c", "cc", "cpp", "cxx", "h", "hh",
"hpp", "hxx", "mm", "m", "java", "kt", "kts", "swift", "scala", "dart", "cs", "fs",
];
const HASH_LINE_EXTS: &[&str] = &[
"sh", "bash", "zsh", "py", "rb", "ps1", "psm1", "psd1", "ksh", "fish",
];
#[derive(Clone, Copy)]
enum HeaderStyle {
Block,
Line(&'static str),
}
#[derive(Clone, Copy)]
struct FileTemplate {
header: &'static str,
style: HeaderStyle,
}
impl FileTemplate {
const fn new(header: &'static str, style: HeaderStyle) -> Self {
Self { header, style }
}
}
struct Processor {
current_year: i32,
updated: usize,
ignore_patterns: Vec<String>,
}
impl Processor {
fn new() -> Self {
let current_year = chrono::Datelike::year(&chrono::Utc::now());
let mut processor = Processor {
current_year,
updated: 0,
ignore_patterns: Vec::new(),
};
processor.load_gitignore();
processor
}
fn load_gitignore(&mut self) {
if let Ok(file) = fs::File::open(".gitignore") {
let reader = BufReader::new(file);
for line in reader.lines().map_while(Result::ok) {
let trimmed = line.trim();
if !trimmed.is_empty() && !trimmed.starts_with('#') {
self.ignore_patterns.push(trimmed.to_string());
}
}
}
}
fn should_ignore(&self, path: &str) -> bool {
if path.contains("fluxer_static") {
return true;
}
for pattern in &self.ignore_patterns {
if self.match_pattern(pattern, path) {
return true;
}
}
false
}
fn match_pattern(&self, pattern: &str, path: &str) -> bool {
if let Some(sub_pattern) = pattern.strip_prefix("**/") {
if sub_pattern.ends_with('/') {
let dir_name = sub_pattern.trim_end_matches('/');
return path
.split(std::path::MAIN_SEPARATOR)
.any(|part| part == dir_name);
}
return path
.split(std::path::MAIN_SEPARATOR)
.any(|part| part == sub_pattern);
}
if pattern.ends_with('/') {
let dir_pattern = pattern.trim_end_matches('/');
return path
.split(std::path::MAIN_SEPARATOR)
.any(|part| part == dir_pattern)
|| path.starts_with(&format!("{dir_pattern}/"));
}
if let Some(p) = pattern.strip_prefix('/') {
return path == p;
}
path.split(std::path::MAIN_SEPARATOR)
.any(|part| part == pattern)
|| Path::new(path).file_name().and_then(|f| f.to_str()) == Some(pattern)
}
fn is_target_file(&self, path: &Path) -> bool {
self.get_template(path).is_some()
}
fn get_template(&self, path: &Path) -> Option<FileTemplate> {
path.extension()
.and_then(|ext| ext.to_str())
.and_then(Self::template_for_extension)
}
fn template_for_extension(ext: &str) -> Option<FileTemplate> {
let normalized = ext.to_ascii_lowercase();
if BLOCK_COMMENT_EXTS.contains(&normalized.as_str()) {
Some(FileTemplate::new(TS_LICENSE_HEADER, HeaderStyle::Block))
} else if HASH_LINE_EXTS.contains(&normalized.as_str()) {
Some(FileTemplate::new(
SHELL_LICENSE_HEADER,
HeaderStyle::Line("#"),
))
} else {
match normalized.as_str() {
"gleam" => Some(FileTemplate::new(
GLEAM_LICENSE_HEADER,
HeaderStyle::Line("////"),
)),
"erl" | "hrl" => Some(FileTemplate::new(
ERLANG_LICENSE_HEADER,
HeaderStyle::Line("%%"),
)),
_ => None,
}
}
}
fn detect_license(&self, content: &str) -> (bool, Option<i32>) {
let lines: Vec<&str> = content.lines().take(25).collect();
let mut has_agpl = false;
let mut has_fluxer = false;
let mut detected_year = None;
let year_regex = Regex::new(r"\b(20\d{2})\b").unwrap();
for line in lines {
let lower = line.to_lowercase();
if lower.contains("gnu affero general public license") || lower.contains("agpl") {
has_agpl = true;
}
if lower.contains("fluxer") {
has_fluxer = true;
}
if lower.contains("copyright")
&& lower.contains("fluxer")
&& detected_year.is_none()
&& let Some(cap) = year_regex.captures(line)
&& let Ok(year) = cap[1].parse::<i32>()
&& (1900..3000).contains(&year)
{
detected_year = Some(year);
}
}
(has_agpl && has_fluxer, detected_year)
}
fn update_year(&self, content: &str, old_year: i32) -> String {
content.replacen(&old_year.to_string(), &self.current_year.to_string(), 1)
}
fn strip_license_header(&self, content: &str, style: HeaderStyle) -> (String, bool) {
let lines: Vec<&str> = content.split('\n').collect();
if lines.is_empty() {
return (content.to_string(), false);
}
let mut prefix_end = 0;
if let Some(first) = lines.get(0) {
if first.starts_with("#!") {
prefix_end = 1;
}
}
let mut header_start = prefix_end;
while header_start < lines.len() && lines[header_start].trim().is_empty() {
header_start += 1;
}
if header_start >= lines.len() {
return (content.to_string(), false);
}
let original_ending = content.ends_with('\n');
let after_idx = match style {
HeaderStyle::Block => {
let first = lines[header_start].trim_start();
if !first.starts_with("/*") {
return (content.to_string(), false);
}
let mut header_end = header_start;
let mut found_end = false;
for i in header_start..lines.len() {
if lines[i].contains("*/") {
header_end = i;
found_end = true;
break;
}
}
if !found_end {
return (content.to_string(), false);
}
let mut after = header_end + 1;
while after < lines.len() && lines[after].trim().is_empty() {
after += 1;
}
after
}
HeaderStyle::Line(prefix) => {
let first = lines[header_start].trim_start();
if !first.starts_with(prefix) {
return (content.to_string(), false);
}
let mut header_end = header_start;
while header_end < lines.len() {
let trimmed = lines[header_end].trim_start();
if trimmed.is_empty() {
break;
}
if trimmed.starts_with(prefix) {
header_end += 1;
continue;
}
break;
}
let mut after = header_end;
while after < lines.len() && lines[after].trim().is_empty() {
after += 1;
}
after
}
};
let mut new_lines = Vec::new();
new_lines.extend_from_slice(&lines[..prefix_end]);
new_lines.extend_from_slice(&lines[after_idx..]);
let mut result = new_lines.join("\n");
if original_ending && !result.ends_with('\n') {
result.push('\n');
}
(result, true)
}
fn add_header(&self, content: &str, template: FileTemplate) -> String {
let header = template
.header
.replace("{year}", &self.current_year.to_string());
if let Some(first_line) = content.lines().next()
&& first_line.starts_with("#!")
{
let rest = content.lines().skip(1).collect::<Vec<_>>().join("\n");
return format!("{first_line}\n\n{header}\n\n{rest}");
}
format!("{header}\n\n{content}")
}
fn process_file(&mut self, path: &Path) -> Result<(), Box<dyn std::error::Error>> {
let content = fs::read_to_string(path)?;
let template = self.get_template(path).ok_or("Unknown file type")?;
let (has_header, detected_year) = self.detect_license(&content);
let (new_content, action) = if !has_header {
(self.add_header(&content, template), "Added header")
} else {
let (stripped, stripped_ok) = self.strip_license_header(&content, template.style);
if stripped_ok {
(self.add_header(&stripped, template), "Normalized header")
} else if let Some(old_year) = detected_year {
if old_year == self.current_year {
return Ok(());
}
(
self.update_year(&content, old_year),
&format!("Updated year {} → {}", old_year, self.current_year) as &str,
)
} else {
return Ok(());
}
};
fs::write(path, new_content)?;
self.updated += 1;
println!("{}: {}", action, path.display());
Ok(())
}
fn walk(&mut self) -> Result<(), Box<dyn std::error::Error>> {
let paths: Vec<PathBuf> = WalkDir::new(".")
.into_iter()
.filter_map(std::result::Result::ok)
.filter(|e| {
let path = e.path();
let path_str = path.to_string_lossy();
!self.should_ignore(&path_str)
&& e.file_type().is_file()
&& self.is_target_file(path)
})
.map(|e| e.path().to_path_buf())
.collect();
for path in paths {
if let Err(e) = self.process_file(&path) {
eprintln!("Error processing {path:?}: {e}");
}
}
Ok(())
}
}
fn main() {
let mut processor = Processor::new();
if let Err(e) = processor.walk() {
eprintln!("Error: {e}");
std::process::exit(1);
}
println!("Updated {} files", processor.updated);
}