copywrite: add passthru.updateScript, 0.19.0 -> 0.21.0 (#377649)

Author: FliegendeWurst

pkgs/by-name/co/copywrite/package.nix

@@ -5,24 +5,25 @@
   fetchFromGitHub,
   installShellFiles,
   versionCheckHook,
+  writeScript,
 }:
 
 let
-  commitHash = "6ed520a710166c6094098b786c63f212604654a4"; # matches tag release
+  commitHash = "9d021bf61a094a5eac6ae3084ceed2dda4700a73"; # matches tag release
   shortCommitHash = builtins.substring 0 7 commitHash;
 in
 buildGoModule rec {
   pname = "copywrite";
-  version = "0.19.0";
+  version = "0.21.0";
 
   src = fetchFromGitHub {
     owner = "hashicorp";
     repo = "copywrite";
     tag = "v${version}";
-    hash = "sha256-DmlPioaw/wMk8GoBYNG24P4J1C6h0bjVjjOuMYW6Tgo=";
+    hash = "sha256-TGis7rreRen+vk3tUDehRkyas4xrBBxKlA70+VqoGWY=";
   };
 
-  vendorHash = "sha256-ZIu0/fue3xi+YVE9GFsVjCNs8t3c3TWH8O0xUzJdim8=";
+  vendorHash = "sha256-Qxp6BwN/Y6Xb1BwFGT/T8WYsXGPgN27mzoTE0i6cS1Q=";
 
   ldflags = [
     "-s"
@@ -44,6 +45,22 @@ buildGoModule rec {
   nativeInstallCheckInputs = [ versionCheckHook ];
   doInstallCheck = true;
 
+  passthru.updateScript = writeScript "update-copywrite" ''
+    #!/usr/bin/env nix-shell
+    #!nix-shell -i bash -p curl jq nix-update
+
+    set -eu -o pipefail
+
+    gh_metadata="$(curl -sS https://api.github.com/repos/hashicorp/copywrite/tags)"
+    version="$(echo "$gh_metadata" | jq -r '.[] | .name' | sort --version-sort | tail -1)"
+    commit_hash="$(echo "$gh_metadata" | jq -r --arg ver "$version" '.[] | select(.name == $ver).commit.sha')"
+
+    filename="$(nix-instantiate --eval -E "with import ./. {}; (builtins.unsafeGetAttrPos \"version\" copywrite).file" | tr -d '"')"
+    sed -i "s/commitHash = \"[^\"]*\"/commitHash = \"$commit_hash\"/" $filename
+
+    nix-update copywrite
+  '';
+
   meta = {
     description = "Automate copyright headers and license files at scale";
     mainProgram = "copywrite";