From 4bdff9dedf0c1868bb04bbe2a7db1148f5bb2411 Mon Sep 17 00:00:00 2001
From: Doron Behar <doron.behar@gmail.com>
Date: Fri, 20 Nov 2020 10:08:15 +0200
Subject: [PATCH] Switch to flakes

Use VERSION file to define version for both Makefile and flake.nix.
---
 .gitignore  |  1 +
 Makefile    |  2 +-
 VERSION     |  1 +
 default.nix |  9 ++++++++
 flake.lock  | 60 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 flake.nix   | 40 +++++++++++++++++++++++++++++++++++
 6 files changed, 112 insertions(+), 1 deletion(-)
 create mode 100644 VERSION
 create mode 100644 default.nix
 create mode 100644 flake.lock
 create mode 100644 flake.nix

diff --git a/.gitignore b/.gitignore
index 5164e2c..1569f8e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -23,3 +23,4 @@
 # End of https://www.gitignore.io/api/go
 /cmd/pistol/pistol
 /pistol
+result
diff --git a/Makefile b/Makefile
index 01f3b46..3b7f12b 100644
--- a/Makefile
+++ b/Makefile
@@ -3,7 +3,7 @@
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
 NAME := pistol
-VERSION := v0.1.6
+VERSION := v$(shell cat VERSION)-git
 
 build:
 	go build -ldflags "-X 'main.Version=$(VERSION)'" ./cmd/pistol
diff --git a/VERSION b/VERSION
new file mode 100644
index 0000000..c946ee6
--- /dev/null
+++ b/VERSION
@@ -0,0 +1 @@
+0.1.6
diff --git a/default.nix b/default.nix
new file mode 100644
index 0000000..f8a169d
--- /dev/null
+++ b/default.nix
@@ -0,0 +1,9 @@
+(import (
+  let
+    lock = builtins.fromJSON (builtins.readFile ./flake.lock);
+  in fetchTarball {
+    url = "https://github.com/edolstra/flake-compat/archive/${lock.nodes.flake-compat.locked.rev}.tar.gz";
+    sha256 = lock.nodes.flake-compat.locked.narHash; }
+) {
+  src =  ./.;
+}).defaultNix
diff --git a/flake.lock b/flake.lock
new file mode 100644
index 0000000..3abfb97
--- /dev/null
+++ b/flake.lock
@@ -0,0 +1,60 @@
+{
+  "nodes": {
+    "flake-compat": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1603796912,
+        "narHash": "sha256-6ayqpH/4XiEXylNdWI3AghubqS6XuiPg3Y60jY8RTo4=",
+        "owner": "edolstra",
+        "repo": "flake-compat",
+        "rev": "19576c2aea7f074ff0da818b21a8b0950ff6ec86",
+        "type": "github"
+      },
+      "original": {
+        "owner": "edolstra",
+        "repo": "flake-compat",
+        "type": "github"
+      }
+    },
+    "flake-utils": {
+      "locked": {
+        "lastModified": 1605370193,
+        "narHash": "sha256-YyMTf3URDL/otKdKgtoMChu4vfVL3vCMkRqpGifhUn0=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "5021eac20303a61fafe17224c087f5519baed54d",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1605447878,
+        "narHash": "sha256-gvO1uqPhXOT9k5Gggfll0ZMipPIJuRu9+NFMkTfOya8=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "069f183f16c3ea5d4b6e7625433b92eba77534f7",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "flake-compat": "flake-compat",
+        "flake-utils": "flake-utils",
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}
diff --git a/flake.nix b/flake.nix
new file mode 100644
index 0000000..26f3b15
--- /dev/null
+++ b/flake.nix
@@ -0,0 +1,40 @@
+{
+  description = "General purpose file previewer designed for Ranger, Lf to make scope.sh redundant";
+
+  # To make user overrides of the nixpkgs flake not take effect
+  inputs.nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
+  inputs.flake-utils.url = "github:numtide/flake-utils";
+
+  # https://nixos.wiki/wiki/Flakes#Using_flakes_project_from_a_legacy_Nix
+  inputs.flake-compat = {
+    url = "github:edolstra/flake-compat";
+    flake = false;
+  };
+
+  outputs = { self, nixpkgs, flake-utils, flake-compat }:
+    flake-utils.lib.eachDefaultSystem
+      (system:
+        let
+          pkgs = nixpkgs.legacyPackages.${system};
+          pistol = pkgs.pistol.overrideAttrs(oldAttrs: rec {
+            version = "${builtins.readFile ./VERSION}-flake";
+            buildFlagsArray = [
+              "-ldflags=-s -w -X main.Version=${version}"
+            ];
+          });
+        in rec {
+          devShell = pkgs.mkShell {
+            buildInputs = pistol.buildInputs ++ [
+              pkgs.w3m
+            ];
+          };
+          packages.pistol = pistol;
+          defaultPackage = pistol;
+          apps.pistol = {
+            type = "app";
+            program = "${pistol}/bin/pistol";
+          };
+          defaultApp = apps.pistol;
+        }
+      );
+}