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use std::fs::File;
use std::io::Write;
use std::fs::OpenOptions;
use std::path::PathBuf;
use std::collections::HashMap;
use std::sync::{Mutex, MutexGuard};
use std::borrow::Borrow;
use std;
#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash)]
pub enum LoggerCategory {
Status,
Error,
DebugGeneral,
DebugMoveFiles,
DebugTemplateInstantiation,
DebugInheritance,
DebugParserSkips,
DebugParser,
DebugFfiSkips,
DebugSignals,
DebugAllocationPlace,
DebugRustSkips,
DebugQtDoc,
DebugQtDocDeclarations,
DebugQtHeaderNames,
}
pub use self::LoggerCategory::*;
#[derive(Debug)]
pub struct LoggerSettings {
pub file_path: Option<PathBuf>,
pub write_to_stderr: bool,
}
impl Default for LoggerSettings {
fn default() -> LoggerSettings {
LoggerSettings {
file_path: None,
write_to_stderr: true,
}
}
}
impl LoggerSettings {
fn is_on(&self) -> bool {
self.write_to_stderr || self.file_path.is_some()
}
}
#[derive(Default)]
pub struct Logger {
default_settings: LoggerSettings,
category_settings: HashMap<LoggerCategory, LoggerSettings>,
files: HashMap<LoggerCategory, File>,
}
impl Logger {
pub fn new() -> Logger {
Logger::default()
}
pub fn set_default_settings(&mut self, value: LoggerSettings) {
self.default_settings = value;
self.files.clear();
}
pub fn set_category_settings(&mut self, category: LoggerCategory, value: LoggerSettings) {
self.category_settings.insert(category, value);
self.files.remove(&category);
}
pub fn set_all_category_settings(&mut self, value: HashMap<LoggerCategory, LoggerSettings>) {
self.category_settings = value;
self.files.clear();
}
pub fn is_on(&self, category: LoggerCategory) -> bool {
self.settings(category).is_on()
}
pub fn llog<T: Borrow<str>, F: FnOnce() -> T>(&mut self, category: LoggerCategory, f: F) {
let settings = if let Some(data) = self.category_settings.get(&category) {
data
} else {
&self.default_settings
};
if !settings.is_on() {
return;
}
let text = f();
if settings.write_to_stderr {
std::io::stderr()
.write(text.borrow().as_bytes())
.unwrap();
std::io::stderr().write(b"\n").unwrap();
}
if let Some(ref path) = settings.file_path {
if !self.files.contains_key(&category) {
let file =
OpenOptions::new()
.write(true)
.create(true)
.append(true)
.open(path)
.unwrap_or_else(|err| panic!("failed to open log file '{}': {}", path.display(), err));
self.files.insert(category, file);
}
let mut file = self.files.get_mut(&category).unwrap();
file.write(text.borrow().as_bytes()).unwrap();
file.write(b"\n").unwrap();
}
}
pub fn log<T: Borrow<str>>(&mut self, category: LoggerCategory, text: T) {
self.llog(category, move || text);
}
fn settings(&self, category: LoggerCategory) -> &LoggerSettings {
if let Some(data) = self.category_settings.get(&category) {
data
} else {
&self.default_settings
}
}
}
lazy_static! {
pub static ref DEFAULT_LOGGER: Mutex<Logger> = Mutex::new(Logger::new());
}
pub fn default_logger() -> MutexGuard<'static, Logger> {
DEFAULT_LOGGER.lock().unwrap()
}
pub fn status<T: Borrow<str>>(text: T) {
default_logger().log(LoggerCategory::Status, text);
}
pub fn error<T: Borrow<str>>(text: T) {
default_logger().log(LoggerCategory::Error, text);
}
pub fn log<T: Borrow<str>>(category: LoggerCategory, text: T) {
default_logger().log(category, text);
}
pub fn llog<T: Borrow<str>, F: FnOnce() -> T>(category: LoggerCategory, f: F) {
default_logger().llog(category, f);
}