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shimmeringmoon/src/logs.rs

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//! One of the goals of the bot is to never save user-images to disk (for
//! performance and safety reasons), opting to perform operations in-memory
//! instead.
//!
//! While great in practice, this makes debugging much harder. This module
//! allows for a convenient way to throw images into a `logs` directory with
//! a simple env var.
use std::{env, ops::Deref, sync::OnceLock, time::Instant};
use image::{DynamicImage, EncodableLayout, ImageBuffer, PixelWithColorType};
use crate::context::Error;
#[inline]
fn should_save_debug_images() -> bool {
env::var("SHIMMERING_DEBUG_IMGS")
.map(|s| s == "1")
.unwrap_or(false)
}
#[inline]
fn get_startup_time() -> Instant {
static CELL: OnceLock<Instant> = OnceLock::new();
*CELL.get_or_init(|| Instant::now())
}
#[inline]
pub fn debug_image_log(image: &DynamicImage) -> Result<(), Error> {
if should_save_debug_images() {
image.save(format!(
"./logs/{:0>15}.png",
get_startup_time().elapsed().as_nanos()
))?;
}
Ok(())
}
#[inline]
pub fn debug_image_buffer_log<P, C>(image: &ImageBuffer<P, C>) -> Result<(), Error>
where
P: PixelWithColorType,
[P::Subpixel]: EncodableLayout,
C: Deref<Target = [P::Subpixel]>,
{
if should_save_debug_images() {
image.save(format!(
"./logs/{:0>15}.png",
get_startup_time().elapsed().as_nanos()
))?;
}
Ok(())
}