npins: init at 0.5.1

pkgs/npins/default.nix

@@ -0,0 +1,84 @@
+# npins — simple and convenient dependency pinning for Nix
+{
+  lib,
+  stdenv,
+  rustPlatform,
+  fetchFromGitHub,
+  makeWrapper,
+  installShellFiles,
+  testers,
+  nix-update-script,
+
+  # runtime dependencies — npins shells out to all of these
+  nix, # direct calls (nix.rs:20,:264) and nix-prefetch-git's nix-hash (corepkgs#211)
+  nix-prefetch-git,
+  nix-prefetch-docker,
+  skopeo, # container pins; absent upstream, leaving `npins add container` broken
+  git, # for `git ls-remote`
+}:
+
+let
+  # openssh deliberately absent: npins sets GIT_SSH_COMMAND, so git resolves
+  # `ssh` via PATH and callers supply it.
+  runtimePath = lib.makeBinPath [
+    nix
+    nix-prefetch-git
+    nix-prefetch-docker
+    skopeo
+    git
+  ];
+
+  # npins-completions only runs on a host that can execute what it just built.
+  canRunCompletions = stdenv.buildPlatform.canExecute stdenv.hostPlatform;
+in
+rustPlatform.buildRustPackage (finalAttrs: {
+  pname = "npins";
+  version = "0.5.1";
+
+  src = fetchFromGitHub {
+    owner = "andir";
+    repo = "npins";
+    tag = finalAttrs.version;
+    hash = "sha256-PRdGQlxpv8qXdQ6KwlP2Ky2HBHDY83lGTSiD6yljUxE=";
+  };
+
+  cargoHash = "sha256-N0Hurb/cmXCDS7EZlYCct9WPbUMXvU+0TK1cBY6+mYc=";
+
+  cargoBuildFlags = [
+    "-p"
+    "npins"
+  ]
+  ++ lib.optionals canRunCompletions [
+    "-p"
+    "npins-completions"
+  ];
+
+  nativeBuildInputs = [
+    makeWrapper
+    installShellFiles
+  ];
+
+  # built and removed together so the removal cannot drift ahead of the use
+  postInstall = lib.optionalString canRunCompletions ''
+    installShellCompletion --cmd npins \
+      --bash <($out/bin/npins-completions bash) \
+      --fish <(cat <($out/bin/npins-completions fish) $src/completions/pin-completions.fish) \
+      --zsh <($out/bin/npins-completions zsh)
+
+    rm -f $out/bin/npins-completions
+  '';
+
+  postFixup = ''
+    wrapProgram $out/bin/npins --prefix PATH : "${runtimePath}"
+  '';
+
+  passthru.tests.version = testers.testVersion { package = finalAttrs.finalPackage; };
+  passthru.updateScript = nix-update-script { };
+
+  meta = {
+    description = "Simple and convenient dependency pinning for Nix";
+    mainProgram = "npins";
+    homepage = "https://github.com/andir/npins";
+    license = lib.licenses.eupl12;
+  };
+})