Make demo use JSON, include compile time, sha256 hash, arg option

This commit is contained in:
2024-12-21 22:26:17 -06:00
parent bb7eada73c
commit 9aaefc7bb4
5 changed files with 499 additions and 5 deletions

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/target

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@@ -5,3 +5,15 @@ edition = "2021"
build = "build.rs"
[dependencies]
chrono = "0.4.39"
hex = "0.4.3"
serde = { version = "1.0.216", features = ["derive"] }
serde_json = "1.0.134"
sha2 = "0.10.8"
[build-dependencies]
chrono = "0.4.39"
hex = "0.4.3"
serde = { version = "1.0.216", features = ["derive"] }
serde_json = "1.0.134"
sha2 = "0.10.8"

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@@ -1,3 +1,5 @@
use serde::Serialize;
use sha2::Digest;
use std::{
env,
error::Error,
@@ -6,13 +8,32 @@ use std::{
path::Path,
};
// Shared between build.rs and main.rs
#[derive(Serialize, Debug)]
struct KeyData<'a> {
value: &'a str,
// value_hash is not intended to be a secure trusted hash; I don't know if there's a way to ensure it stays unmodified regardless
value_hash: String,
compile_time: String,
}
fn main() -> Result<(), Box<dyn Error>> {
let out_dir = env::var("OUT_DIR")?;
let dest_path = Path::new(&out_dir).join("long_string.txt");
let dest_path = Path::new(&out_dir).join("key.json");
let mut f = BufWriter::new(File::create(&dest_path)?);
let long_string = "abc".repeat(100);
write!(f, "{}", long_string)?;
let compile_time = chrono::Utc::now().to_rfc3339();
let value = "Hello, world!";
let value_hash = sha2::Sha256::digest(value.as_bytes());
let key_data = KeyData {
value,
value_hash: hex::encode(value_hash),
compile_time,
};
let json_data = serde_json::to_string(&key_data)?;
write!(f, "{}", json_data.to_string())?;
Ok(())
}

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@@ -1,5 +1,34 @@
static LONG_STRING: &'static str = include_str!(concat!(env!("OUT_DIR"), "/long_string.txt"));
use serde::{Deserialize, Serialize};
use sha2::Digest;
// Shared between build.rs and main.rs
#[derive(Serialize, Deserialize, Debug)]
struct KeyData<'a> {
value: &'a str,
value_hash: String,
compile_time: String,
}
static KEY: &'static str = include_str!(concat!(env!("OUT_DIR"), "/key.json"));
fn main() {
println!("This package was compiled at {}", LONG_STRING);
let key_data: KeyData = serde_json::from_str(KEY).unwrap();
// Print the key data
let args: Vec<String> = std::env::args().collect();
if args.contains(&"--help".to_string()) {
println!("Usage: {} [--json] [--help]", args[0]);
println!("--json: Print the key data as JSON");
println!("--help: Print this help message");
return;
} else if args.contains(&"--json".to_string()) {
println!("{}", serde_json::to_string_pretty(&key_data).unwrap());
return;
}
// Check the hash of the value
let value_hash = sha2::Sha256::digest(key_data.value.as_bytes());
let hash_match = hex::encode(value_hash) == key_data.value_hash;
println!("Hash match: {}", hash_match);
}