/// deterministic nostr event build example // deterministic ...

2026-04-03T02:18:31Z

/// deterministic nostr event build example
// deterministic nostr event build example
use get_file_hash_core::get_file_hash;
#[cfg(all(not(debug_assertions), feature = "nostr"))]
use get_file_hash_core::{get_git_tracked_files, DEFAULT_GNOSTR_KEY, DEFAULT_PICTURE_URL, DEFAULT_BANNER_URL};
#[cfg(all(not(debug_assertions), feature = "nostr"))]
use nostr_sdk::{EventBuilder, Keys, EventId, Tag, SecretKey, JsonUtil, Kind, Event};

#[cfg(all(not(debug_assertions), feature = "nostr"))]
use std::fs;
use std::path::PathBuf;
use sha2::{Digest, Sha256};
#[cfg(all(not(debug_assertions), feature = "nostr"))]
use ::hex;
#[cfg(all(not(debug_assertions), feature = "nostr"))]
use std::io::Write;

#[cfg(all(not(debug_assertions), feature = "nostr"))]
fn should_remove_relay(error_msg: &str) -> bool {
error_msg.contains("relay not connected") ||
error_msg.contains("not in web of trust") ||
error_msg.contains("blocked: not authorized") ||
error_msg.contains("timeout") ||
error_msg.contains("blocked: spam not permitted") ||
error_msg.contains("relay experienced an error trying to publish the latest event") ||
error_msg.contains("duplicate: event already broadcast")
}

#[cfg(all(not(debug_assertions), feature = "nostr"))]
fn write_event_json_to_file(
output_dir: &PathBuf,
filename: &str,
event: &Event,
) -> Option<()> {
let file_path = output_dir.join(filename);
if let Some(parent) = file_path.parent() {
if let Err(e) = fs::create_dir_all(parent) {
println!("cargo:warning=Failed to create parent directories for {}: {}", file_path.display(), e);
return None;
}
}
if let Err(e) = fs::File::create(&file_path).and_then(|mut file| write!(file, "{}", event.as_json())) {
println!("cargo:warning=Failed to write event JSON to file {}: {}", file_path.display(), e);
None
} else {
println!("cargo:warning=Successfully wrote event JSON to {}", file_path.display());
Some(())
}
}

#[cfg(all(not(debug_assertions), feature = "nostr"))]
async fn publish_nostr_event_if_release(
hash: String,
keys: Keys,
event_builder: EventBuilder,
mut relay_urls: Vec<String>,
file_path_str: &str,
output_dir: &PathBuf,
) -> Option<EventId> {
let client = nostr_sdk::Client::new(keys.clone());
let public_key = keys.public_key().to_string();

for i in (0..relay_urls.len()).rev() {
let relay_url = &relay_urls[i];
if let Err(e) = client.add_relay(relay_url).await {
println!("cargo:warning=Failed to add relay {}: {}", relay_url, e);
}
}
println!("cargo:warning=Added {} relays", relay_urls.len());

client.connect().await;
println!("cargo:warning=Connected to {} relays", relay_urls.len());

let event = client.sign_event_builder(event_builder).await.unwrap();

match client.send_event(&event).await { Ok(event_output) => {
println!("cargo:warning=Published Nostr event for {}: {}", file_path_str, event_output.val);

// Print successful relays
for relay_url in event_output.success.iter() {
println!("cargo:warning=Successfully published to relay: {}", relay_url);
}
// Print failed relays and remove "unfriendly" relays from the list
let mut relays_to_remove: Vec<String> = Vec::new();
for (relay_url, error_msg) in event_output.failed.iter() {
if should_remove_relay(error_msg) {
relays_to_remove.push(relay_url.to_string());
}
}
// Remove failed relays from the list
relay_urls.retain(|url| !relays_to_remove.contains(url));
if !relays_to_remove.is_empty() {
println!("cargo:warning=Removed {} unresponsive relays from the list.", relays_to_remove.len());
}

let filename = format!("{}/{}/{}/{}.json", file_path_str, hash, public_key.clone(), event_output.val.to_string());
write_event_json_to_file(output_dir, &filename, &event);
Some(event_output.val)
},
Err(e) => {
println!("cargo:warning=Failed to publish Nostr event for {}: {}", file_path_str, e);
None
},
}
}

#[cfg(all(not(debug_assertions), feature = "nostr"))]
pub async fn get_repo_announcement_event(
keys: &Keys,
relay_urls: &Vec<String>,
repo_url: &str,
repo_name: &str,
repo_description: &str,
git_commit_hash: &str,
git_branch: &str,
output_dir: &PathBuf,
public_key_hex: &str,
) -> Option<EventId> {
let client = nostr_sdk::Client::new(keys.clone());

for relay_url in relay_urls {
if let Err(e) = client.add_relay(relay_url).await {
println!("cargo:warning=Failed to add relay {}: {}", relay_url, e);
}
}
client.connect().await;

let tags = vec![
Tag::parse(["r", repo_url].iter().map(ToString::to_string).collect::<Vec<String>>()).unwrap(),
Tag::parse(["name", repo_name].iter().map(ToString::to_string).collect::<Vec<String>>()).unwrap(),
Tag::parse(["description", repo_description].iter().map(ToString::to_string).collect::<Vec<String>>()).unwrap(),
Tag::parse(["commit", git_commit_hash].iter().map(ToString::to_string).collect::<Vec<String>>()).unwrap(),
Tag::parse(["branch", git_branch].iter().map(ToString::to_string).collect::<Vec<String>>()).unwrap(),
];

let event_builder = EventBuilder::new(Kind::Custom(30617), repo_description).tags(tags);
let event = client.sign_event_builder(event_builder).await.unwrap();

match client.send_event(&event).await {
Ok(event_output) => {
println!("cargo:warning=Published Nostr Repository Announcement for {}: {}", repo_name, event_output.val);

let filename = format!("30617/{}/{}/{}.json", repo_name, public_key_hex, event_output.val.to_string());
write_event_json_to_file(output_dir, &filename, &event);
Some(event_output.val)
},
Err(e) => {
println!("cargo:warning=Failed to publish Nostr Repository Announcement for {}: {}", repo_name, e);
None
},
}
}

#[tokio::main]
async fn main() {
let manifest_dir = std::env::var("CARGO_MANIFEST_DIR").unwrap();
let is_git_repo = std::path::Path::new(&manifest_dir).join(".git").exists();

println!("cargo:rustc-env=CARGO_PKG_NAME={}", env!("CARGO_PKG_NAME"));
println!("cargo:rustc-env=CARGO_PKG_VERSION={}", env!("CARGO_PKG_VERSION"));

if is_git_repo {
let git_commit_hash_output = std::process::Command::new("git")
.args(&["rev-parse", "HEAD"])
.stdout(std::process::Stdio::piped())
.stderr(std::process::Stdio::piped())
.output()
.expect("Failed to execute git command for commit hash");

let git_commit_hash_str = if git_commit_hash_output.status.success() && !git_commit_hash_output.stdout.is_empty() {
String::from_utf8(git_commit_hash_output.stdout).unwrap().trim().to_string()
} else {
println!("cargo:warning=Git commit hash command failed or returned empty. Status: {:?}, Stderr: {}",
git_commit_hash_output.status, String::from_utf8_lossy(&git_commit_hash_output.stderr));
String::new()
};
println!("cargo:rustc-env=GIT_COMMIT_HASH={}", git_commit_hash_str);

let git_branch_output = std::process::Command::new("git")
.args(&["rev-parse", "--abbrev-ref", "HEAD"])
.stdout(std::process::Stdio::piped())
.stderr(std::process::Stdio::piped())
.output()
.expect("Failed to execute git command for branch name");

let git_branch_str = if git_branch_output.status.success() && !git_branch_output.stdout.is_empty() {
String::from_utf8(git_branch_output.stdout).unwrap().trim().to_string()
} else {
println!("cargo:warning=Git branch command failed or returned empty. Status: {:?}, Stderr: {}",
git_branch_output.status, String::from_utf8_lossy(&git_branch_output.stderr));
String::new()
};
println!("cargo:rustc-env=GIT_BRANCH={}", git_branch_str);
} else {
println!("cargo:rustc-env=GIT_COMMIT_HASH=");
println!("cargo:rustc-env=GIT_BRANCH=");
}

println!("cargo:rerun-if-changed=.git/HEAD");

#[cfg(all(not(debug_assertions), feature = "nostr"))]
let relay_urls = get_file_hash_core::get_relay_urls();

let cargo_toml_hash = get_file_hash!("Cargo.toml");
println!("cargo:rustc-env=CARGO_TOML_HASH={}", cargo_toml_hash);

let lib_hash = get_file_hash!("src/lib.rs");
println!("cargo:rustc-env=LIB_HASH={}", lib_hash);

let build_hash = get_file_hash!("build.rs");
println!("cargo:rustc-env=BUILD_HASH={}", build_hash);

println!("cargo:rerun-if-changed=Cargo.toml");
println!("cargo:rerun-if-changed=src/lib.rs");
println!("cargo:rerun-if-changed=build.rs");
let online_relays_csv_path = PathBuf::from(&manifest_dir).join("src/get_file_hash_core/src/online_relays_gps.csv");
if online_relays_csv_path.exists() {
println!("cargo:rerun-if-changed={}", online_relays_csv_path.to_str().unwrap());
}

#[cfg(all(not(debug_assertions), feature = "nostr"))]
if cfg!(not(debug_assertions)) {
println!("cargo:warning=Nostr feature enabled: Build may take longer due to network operations (publishing events to relays).");

// This code only runs in release builds
let package_version = std::env::var("CARGO_PKG_VERSION").unwrap();

let output_dir = PathBuf::from(format!(".gnostr/build/{}", package_version));
if let Err(e) = fs::create_dir_all(&output_dir) {
println!("cargo:warning=Failed to create output directory {}: {}", output_dir.display(), e);
}

let files_to_publish: Vec<String> = get_git_tracked_files(&PathBuf::from(&manifest_dir));

let mut published_event_ids: Vec<Tag> = Vec::new();

for file_path_str in &files_to_publish {
println!("cargo:warning=Processing file: {}", file_path_str);
match fs::read(file_path_str) {
Ok(bytes) => {
let mut hasher = Sha256::new();
hasher.update(&bytes);
let result = hasher.finalize();
let file_hash_hex = hex::encode(result);

match SecretKey::from_hex(&file_hash_hex.clone()) {
Ok(secret_key) => {
let keys = Keys::new(secret_key);
let content = String::from_utf8_lossy(&bytes).into_owned();
let tags = vec![
Tag::parse(["file", file_path_str].iter().map(ToString::to_string).collect::<Vec<String>>()).unwrap(),
Tag::parse(["version", &package_version].iter().map(ToString::to_string).collect::<Vec<String>>()).unwrap(),
];
let event_builder = EventBuilder::text_note(content).tags(tags);

if let Some(event_id) = publish_nostr_event_if_release(file_hash_hex, keys.clone(), event_builder, relay_urls.clone(), file_path_str, &output_dir).await {
published_event_ids.push(Tag::event(event_id));
}

// Publish metadata event
get_file_hash_core::publish_metadata_event(
&keys,
&relay_urls,
DEFAULT_PICTURE_URL,
DEFAULT_BANNER_URL,
file_path_str,
).await;
}
Err(e) => {
println!("cargo:warning=Failed to derive Nostr secret key for {}: {}", file_path_str, e);
}
}
}
Err(e) => {
println!("cargo:warning=Failed to read file {}: {}", file_path_str, e);
}
}
}

// Create and publish the build_manifest
if !published_event_ids.is_empty() {

//TODO this will be either the default or detected from env vars PRIVATE_KEY
let keys = Keys::new(SecretKey::from_hex(DEFAULT_GNOSTR_KEY).expect("Failed to create Nostr keys from DEFAULT_GNOSTR_KEY"));
let cloned_keys = keys.clone();
let content = format!("Build manifest for get_file_hash v{}", package_version);
let mut tags = vec![
Tag::parse(["build_manifest", &package_version].iter().map(ToString::to_string).collect::<Vec<String>>()).unwrap(),
Tag::parse(["build_manifest", &package_version].iter().map(ToString::to_string).collect::<Vec<String>>()).unwrap(),
Tag::parse(["build_manifest", &package_version].iter().map(ToString::to_string).collect::<Vec<String>>()).unwrap(),
Tag::parse(["build_manifest", &package_version].iter().map(ToString::to_string).collect::<Vec<String>>()).unwrap(),
];
tags.extend(published_event_ids);

let event_builder = EventBuilder::text_note(content.clone()).tags(tags);

if let Some(event_id) = publish_nostr_event_if_release(
hex::encode(Sha256::digest(content.as_bytes())),
keys,
event_builder,
relay_urls.clone(),
"build_manifest.json",
&output_dir,
).await {

let build_manifest_event_id = Some(event_id);

// Publish metadata event for the build manifest
get_file_hash_core::publish_metadata_event(
&cloned_keys, // Use reference to cloned keys here
&relay_urls,
DEFAULT_PICTURE_URL,
DEFAULT_BANNER_URL,
&format!("build_manifest:{}", package_version),
).await;
let git_commit_hash = std::env::var("GIT_COMMIT_HASH").unwrap_or_default();
let git_branch = std::env::var("GIT_BRANCH").unwrap_or_default();
let repo_url = std::env::var("CARGO_PKG_REPOSITORY").unwrap();
let repo_name = std::env::var("CARGO_PKG_NAME").unwrap();
let repo_description = std::env::var("CARGO_PKG_DESCRIPTION").unwrap();

let output_dir = PathBuf::from(format!(".gnostr/build/{}", package_version));
if let Err(e) = fs::create_dir_all(&output_dir) {
println!("cargo:warning=Failed to create output directory {}: {}", output_dir.display(), e);
}

let announcement_keys = Keys::new(SecretKey::from_hex(build_manifest_event_id.unwrap().to_hex().as_str()).expect("Failed to create Nostr keys from build_manifest_event_id"));
let announcement_pubkey_hex = announcement_keys.public_key().to_string();

// Publish NIP-34 Repository Announcement
if let Some(_event_id) = get_repo_announcement_event(
&announcement_keys,
&relay_urls,
&repo_url,
&repo_name,
&repo_description,
&git_commit_hash,
&git_branch,
&output_dir,
&announcement_pubkey_hex
).await {
// Successfully published announcement
}
}
}
}
}
// deterministic nostr event build example

Nostr notes by build.rs

/// deterministic nostr event build example // deterministic ...