Generate Crate.nix on the fly

README.md

@@ -32,7 +32,7 @@ Run the daemons you need. At this moment, none of them accept any arguments.
 
 ## FIXME
 
-1. Generate `Cargo.nix` on the fly
+1. ~~Generate `Cargo.nix` on the fly~~
 2. Bluetooth daemon doesn't actually work, since blurz doesn't allow to get the list of connected devices
 3. Need to figure out icons
 

flake.lock

@@ -1,5 +1,38 @@
 {
   "nodes": {
+    "crate2nix": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1600641867,
+        "narHash": "sha256-JMkuUewrguz/lsdS4UGP7oB3qXRDYhyfwUyZnhg41ug=",
+        "owner": "balsoft",
+        "repo": "crate2nix",
+        "rev": "a8738225fa4ea4add60483b0ebaa55560e8c5722",
+        "type": "github"
+      },
+      "original": {
+        "owner": "balsoft",
+        "ref": "balsoft/callcrate",
+        "repo": "crate2nix",
+        "type": "github"
+      }
+    },
+    "crates-io-index": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1600641984,
+        "narHash": "sha256-u2juQ6LmitgAlj/lztMhjw6i0dIFEUdyVfYYIABWw90=",
+        "owner": "rust-lang",
+        "repo": "crates.io-index",
+        "rev": "6adca9dd72305e56efc0bd516b6324d2542f71d1",
+        "type": "github"
+      },
+      "original": {
+        "owner": "rust-lang",
+        "repo": "crates.io-index",
+        "type": "github"
+      }
+    },
     "nixpkgs": {
       "locked": {
         "lastModified": 1599773960,
@@ -17,6 +50,8 @@
     },
     "root": {
       "inputs": {
+        "crate2nix": "crate2nix",
+        "crates-io-index": "crates-io-index",
         "nixpkgs": "nixpkgs"
       }
     }

flake.nix

@@ -2,20 +2,35 @@
 # balsoft 2020
 
 {
-  inputs = { nixpkgs.url = "github:nixos/nixpkgs"; };
+  inputs = {
+    nixpkgs.url = "github:nixos/nixpkgs";
+    crate2nix = {
+      type = "github";
+      owner = "balsoft";
+      repo = "crate2nix";
+      ref = "balsoft/callcrate";
+      flake = false;
+    };
+    crates-io-index = {
+      url = "github:rust-lang/crates.io-index";
+      flake = false;
+    };
+  };
 
   description = "A collection of simple on-screen-display daemons";
 
-  outputs = { self, nixpkgs }:
+  outputs = { self, nixpkgs, crate2nix, crates-io-index }:
     let forAllSystems = f: builtins.mapAttrs (_: f) nixpkgs.legacyPackages;
     in {
       packages = forAllSystems (pkgs:
         let
           commonDeps = with pkgs; [ libnotify gdk_pixbuf glib ];
 
-          project = import ./Cargo.nix {
-            inherit nixpkgs pkgs;
-            defaultCrateOverrides = pkgs.defaultCrateOverrides // {
+          inherit (import crate2nix { inherit pkgs crates-io-index; }) callCrate;
+
+          project = callCrate {
+            src = ./.;
+            overrides.defaultCrateOverrides = pkgs.defaultCrateOverrides // {
               simple-osd-battery = oa: { buildInputs = commonDeps; };
               simple-osd-bluetooth = oa: {
                 buildInputs = commonDeps