From 556fbdc2c5defbbffbf4e1a2c2fa0c573cd8fc70 Mon Sep 17 00:00:00 2001
From: Astro <astro@spaceboyz.net>
Date: Mon, 5 Sep 2022 21:49:20 +0200
Subject: [PATCH] flake.nix: derive package version from
 inputs.self.lastModifiedDate

---
 flake.nix | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/flake.nix b/flake.nix
index df84f84..181517b 100644
--- a/flake.nix
+++ b/flake.nix
@@ -25,6 +25,13 @@
       };
 
       buildRustPackage = args: naersk-lib.buildPackage ({
+        version =
+          let
+            inherit (self) lastModifiedDate;
+            year = builtins.substring 0 4 lastModifiedDate;
+            month = builtins.substring 4 2 lastModifiedDate;
+            day = builtins.substring 6 2 lastModifiedDate;
+          in "0.1.0-${year}-${month}-${day}";
         src = ./.;
         targets = [ args.pname ];
         cargoBuildOptions = opts: opts ++ [ "-p" args.pname ];
@@ -40,7 +47,7 @@
         pname = "ticker-serve";
         overrideMain = x: {
           installPhase = ''
-	    ${x.installPhase}
+            ${x.installPhase}
 
             mkdir -p $out/shared/libticker $out/shared/ticker-serve
             cp -ar ticker-serve/static $out/shared/ticker-serve/