Cargo: Bump version to 0.4.0

When running in a systemd service with the --idle flag we
want to have systemd's service dependency chain depend on
the templated secret file being written to the output path.

Cargo.lock

@@ -288,13 +288,20 @@ version = "1.0.17"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e86697c916019a8588c99b5fac3cead74ec0b4b819707a682fd4d23fa0ce1ba1"
 
+[[package]]
+name = "sd-notify"
+version = "0.4.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4646d6f919800cd25c50edb49438a1381e2cd4833c027e75e8897981c50b8b5e"
+
 [[package]]
 name = "secrets-file-builder"
-version = "0.3.0"
+version = "0.4.0"
 dependencies = [
  "anyhow",
  "clap",
  "handlebars",
+ "sd-notify",
  "serde_json",
  "url-escape",
 ]

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "secrets-file-builder"
-version = "0.3.0"
+version = "0.4.0"
 edition = "2021"
 authors = ["networkException <git@nwex.de>"]
 license = "BSD-2-Clause"
@@ -12,5 +12,6 @@ repository = "https://git.nwex.de/networkException/secrets-file-builder"
 anyhow = "1.0.88"
 clap = { version = "4.5.17", features = ["derive"] }
 handlebars = "5.1.0"
+sd-notify = "0.4.2"
 serde_json = "1.0.114"
 url-escape = "0.1.1"

src/main.rs

@@ -6,6 +6,7 @@ use std::thread;
 use anyhow::Result;
 
 use clap::Parser;
+use sd_notify::NotifyState;
 use serde_json::{Map, Value};
 use url_escape;
 
@@ -98,6 +99,8 @@ fn main() -> Result<()> {
     fs::write(&output_path, output)
         .expect(format!("To be able to write to '{}'", output_path.to_string_lossy()).as_str());
 
+    sd_notify::notify(true, &[NotifyState::Ready])?;
+
     if idle {
         loop {
             thread::park();