From e3fd1382e94e2537b131127f12150aca19a53907 Mon Sep 17 00:00:00 2001
From: eymeric <eymericdechelette@gmail.com>
Date: Mon, 8 Apr 2024 22:47:59 +0200
Subject: [PATCH] enable building with nix

---
 .envrc                    |  1 +
 .gitignore                |  3 ++
 docs/installation.md      | 11 +++++++
 flake.lock                | 64 +++++++++++++++++++++++++++++++++++++++
 flake.nix                 | 33 ++++++++++++++++++++
 packaging/nix/default.nix | 34 +++++++++++++++++++++
 6 files changed, 146 insertions(+)
 create mode 100644 .envrc
 create mode 100644 flake.lock
 create mode 100644 flake.nix
 create mode 100644 packaging/nix/default.nix

diff --git a/.envrc b/.envrc
new file mode 100644
index 00000000..a5dbbcba
--- /dev/null
+++ b/.envrc
@@ -0,0 +1 @@
+use flake .
diff --git a/.gitignore b/.gitignore
index 74c9721d..d2f1ee13 100644
--- a/.gitignore
+++ b/.gitignore
@@ -33,6 +33,9 @@ coverage*.info
 packaging/_BUILD
 packaging/conda/meta.yaml
 
+#nix
+.direnv/
+
 # CLion
 
 .idea/
diff --git a/docs/installation.md b/docs/installation.md
index f009d6c0..9e9eeb3b 100644
--- a/docs/installation.md
+++ b/docs/installation.md
@@ -53,6 +53,17 @@ conda config --set channel_priority strict
 conda install -c bkryza/label/clang-uml clang-uml
 ```
 
+#### nix
+
+```bash
+nix build
+```
+
+Or if you have flake enabled, you can also run
+```bash
+nix run github:/bkryza/clang-uml
+```
+
 #### Windows
 
 Download and run the latest Windows installer from
diff --git a/flake.lock b/flake.lock
new file mode 100644
index 00000000..0123ed03
--- /dev/null
+++ b/flake.lock
@@ -0,0 +1,64 @@
+{
+  "nodes": {
+    "flake-parts": {
+      "inputs": {
+        "nixpkgs-lib": "nixpkgs-lib"
+      },
+      "locked": {
+        "lastModified": 1712014858,
+        "narHash": "sha256-sB4SWl2lX95bExY2gMFG5HIzvva5AVMJd4Igm+GpZNw=",
+        "owner": "hercules-ci",
+        "repo": "flake-parts",
+        "rev": "9126214d0a59633752a136528f5f3b9aa8565b7d",
+        "type": "github"
+      },
+      "original": {
+        "owner": "hercules-ci",
+        "repo": "flake-parts",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1712512205,
+        "narHash": "sha256-CrKKps0h7FoagRcE2LT3h/72Z64D0Oh83UF1XZVhCLQ=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "3c1b6f75344e207a67536d834886ee9b4577ebe7",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixpkgs-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs-lib": {
+      "locked": {
+        "dir": "lib",
+        "lastModified": 1711703276,
+        "narHash": "sha256-iMUFArF0WCatKK6RzfUJknjem0H9m4KgorO/p3Dopkk=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "d8fe5e6c92d0d190646fb9f1056741a229980089",
+        "type": "github"
+      },
+      "original": {
+        "dir": "lib",
+        "owner": "NixOS",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "flake-parts": "flake-parts",
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}
diff --git a/flake.nix b/flake.nix
new file mode 100644
index 00000000..3358731b
--- /dev/null
+++ b/flake.nix
@@ -0,0 +1,33 @@
+{
+  description = "Description for the project";
+
+  inputs = {
+    flake-parts.url = "github:hercules-ci/flake-parts";
+    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
+  };
+
+  outputs = inputs@{ flake-parts, ... }:
+    flake-parts.lib.mkFlake { inherit inputs; } {
+      imports = [];
+      systems = [ "x86_64-linux" "aarch64-linux" "aarch64-darwin" "x86_64-darwin" ];
+      perSystem = { config, self', inputs', pkgs, system, ... }: {
+
+        packages.default = config.packages.clang-uml;
+        packages.clang-uml = pkgs.callPackage packaging/nix/default.nix { };
+
+        devShells.default = pkgs.mkShell {
+          packages = with pkgs; [
+            # C++ Compiler is already part of stdenv
+            cmake
+            llvmPackages_latest.libllvm
+            yaml-cpp
+            ccache
+            elfutils
+            pkg-config
+            clang
+            libclang
+          ];
+        };
+      };
+    };
+}
diff --git a/packaging/nix/default.nix b/packaging/nix/default.nix
new file mode 100644
index 00000000..a632d101
--- /dev/null
+++ b/packaging/nix/default.nix
@@ -0,0 +1,34 @@
+{ pkgs ? import <nixpkgs> {} }:
+
+
+# Nix derivation for basic C++ project using clang
+with pkgs; stdenv.mkDerivation {
+  name = "clang-uml";
+  src = ../..;
+
+  buildInputs = [
+    clang
+    libclang
+    cmake
+    llvmPackages_latest.libllvm
+    yaml-cpp
+    ccache
+    elfutils
+    pkg-config
+  ];
+
+  dontUseCmakeConfigure = true;
+
+  buildPhase = "CCACHE_DIR=/build/.ccache make release";
+
+  installPhase = ''
+    mkdir -p $out/bin
+    cp release/src/clang-uml $out/bin/clang-uml
+  '';
+
+  postInstall = "
+    installShellCompletion --cmd clang-uml \
+      --zsh packaging/autocomplete/_clang-uml
+      --bach packaging/autocomplete/clang-uml
+  ";
+}