immich-go: refactor linker data

Follow upstream more closely and set `commit` and `date` metadata to
avoid confusion.

Co-authored-by: Anderson Torres <torres.anderson.85@protonmail.com>

1 files changed, 20 insertions, 3 deletions

diff --git a/pkgs/by-name/im/immich-go/package.nix b/pkgs/by-name/im/immich-go/package.nix
index 097df465ba925..439c4768ea15e 100644
--- a/pkgs/by-name/im/immich-go/package.nix
+++ b/pkgs/by-name/im/immich-go/package.nix
@@ -7,7 +7,21 @@ buildGoModule rec {
     owner = "simulot";
     repo = "immich-go";
     rev = "${version}";
-    hash = "sha256-TibDbA4rrr9+WmKAyd3CQ0lxFFv3v/A2HO6Iu66mgFM=";
+    hash = "sha256-5dgEyg55ffJLH8zxp6mFVsUqAzyPnY18XnX+jMethUc=";
+
+    # Inspired by: https://github.com/NixOS/nixpkgs/blob/f2d7a289c5a5ece8521dd082b81ac7e4a57c2c5c/pkgs/applications/graphics/pdfcpu/default.nix#L20-L32
+    # The intention here is to write the information into files in the `src`'s
+    # `$out`, and use them later in other phases (in this case `preBuild`).
+    # In order to keep determinism, we also delete the `.git` directory
+    # afterwards, imitating the default behavior of `leaveDotGit = false`.
+    # More info about git log format can be found at `git-log(1)` manpage.
+    leaveDotGit = true;
+    postFetch = ''
+      cd "$out"
+      git log -1 --pretty=%H > "COMMIT"
+      git log -1 --pretty=%cd --date=format:'%Y-%m-%dT%H:%M:%SZ' > "SOURCE_DATE"
+      rm -rf ".git"
+    '';
   };
 
   vendorHash = "sha256-nOJJz5KEXqxl3tP1Q12Cb/fugtxR67RjzH6khKg3ppE=";
@@ -19,10 +33,13 @@ buildGoModule rec {
     "-w"
     "-extldflags=-static"
     "-X main.version=${version}"
-    "-X main.commit=${version}"
-    "-X main.date=unknown"
   ];
 
+  preBuild = ''
+    ldflags+=" -X main.commit=$(cat COMMIT)"
+    ldflags+=" -X main.date=$(cat SOURCE_DATE)"
+  '';
+
   passthru = {
     updateScript = nix-update-script { };
     tests.versionTest = testers.testVersion {