File reproducible.patch of Package shadowsocks-rust

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File reproducible.patch of Package shadowsocks-rust

From 853a860dd9095b7ed2f95d5aac62f8f1dcc0d229 Mon Sep 17 00:00:00 2001
From: "Bernhard M. Wiedemann" <bwiedemann@suse.de>
Date: Wed, 28 Jun 2023 16:48:35 +0200
Subject: [PATCH] Allow to override build date with SOURCE_DATE_EPOCH

in order to make builds reproducible.
See https://reproducible-builds.org/ for why this is good
and https://reproducible-builds.org/specs/source-date-epoch/
for the definition of this variable.

This patch was done while working on reproducible builds for openSUSE.

Index: shadowsocks-rust-1.20.4/Cargo.toml
===================================================================
--- shadowsocks-rust-1.20.4.orig/Cargo.toml
+++ shadowsocks-rust-1.20.4/Cargo.toml
@@ -281,3 +281,6 @@ byteorder = "1.5"
 env_logger = "0.11"
 byte_string = "1.0"
 tokio = { version = "1", features = ["net", "time", "macros", "io-util"] }
+
+[patch.crates-io]
+build-time = { path="vendor/build-time" }
diff --git a/build-time/src/lib.rs b/build-time/src/lib.rs
index c3484307..7ae9e03e 100644
--- a/vendor/build-time/src/lib.rs
+++ b/vendor/build-time/src/lib.rs
@@ -28,14 +28,18 @@ let local_build_time = build_time_local!("%Y-%m-%dT%H:%M:%S%.f%:z");
 ```
 */
 
-use chrono::{DateTime, Local, Utc};
+use chrono::{DateTime, Local, TimeZone, Utc};
 use once_cell::sync::Lazy;
 use proc_macro::TokenStream;
 use proc_macro2::Span;
 use quote::quote;
+use std::env;
 use syn::{parse_macro_input, LitStr};
 
-static BUILD_TIME: Lazy<DateTime<Utc>> = Lazy::new(Utc::now);
+static BUILD_TIME: Lazy<DateTime<Utc>> = Lazy::new(|| match env::var("SOURCE_DATE_EPOCH") {
+        Ok(val) => { Utc.timestamp_opt(val.parse::<i64>().unwrap(), 0).unwrap() }
+        Err(_) => Utc::now(),
+    });
 
 /// Build time in UTC.
 ///

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File reproducible.patch of Package shadowsocks-rust

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