Install shell completions in `Nix Flake` (#421)

* update `flake.lock`

Flake lock file updates:

• Updated input 'devenv':
    'github:cachix/devenv/8d6d129b666778538b76bcb069ab82f813094e5c' (2023-05-30)
  → 'github:cachix/devenv/3654eb5d47218cfa2d12280ba5ac1ace0a9dd225' (2023-08-30)
• Updated input 'devenv/pre-commit-hooks':
    'github:cachix/pre-commit-hooks.nix/fb58866e20af98779017134319b5663b8215d912' (2023-04-27)
  → 'github:cachix/pre-commit-hooks.nix/5843cf069272d92b60c3ed9e55b7a8989c01d4c7' (2023-06-29)
• Updated input 'devenv/pre-commit-hooks/flake-utils':
    'github:numtide/flake-utils/5aed5285a952e0b949eb3ba02c12fa4fcfef535f' (2022-11-02)
  → 'github:numtide/flake-utils/a1720a10a6cfe8234c0e93907ffe81be440f4cef' (2023-05-31)
• Added input 'devenv/pre-commit-hooks/flake-utils/systems':
    'github:nix-systems/default/da67096a3b9bf56a91d16901293e51ba5b49a27e' (2023-04-09)
• Updated input 'devenv/pre-commit-hooks/nixpkgs-stable':
    'github:NixOS/nixpkgs/9b8e5abb18324c7fe9f07cb100c3cd4a29cda8b8' (2023-03-15)
  → 'github:NixOS/nixpkgs/c37ca420157f4abc31e26f436c1145f8951ff373' (2023-06-03)
• Updated input 'fenix':
    'github:nix-community/fenix/9ea56d5de762971f6a7319711bae0532ca454dc9' (2023-05-30)
  → 'github:nix-community/fenix/76e468cd74a08edcbabb14ce1698ebd2f5fad9d2' (2023-08-29)
• Updated input 'fenix/rust-analyzer-src':
    'github:rust-lang/rust-analyzer/bc8295255c5bcc293251d47590dcbfd320eaab87' (2023-05-29)
  → 'github:rust-lang/rust-analyzer/62268e474e9165de0cdb08d3794eec4b6ef1c6cd' (2023-08-28)
• Updated input 'flake-parts':
    'github:hercules-ci/flake-parts/80717d11615b6f42d1ad2e18ead51193fc15de69' (2023-05-30)
  → 'github:hercules-ci/flake-parts/59cf3f1447cfc75087e7273b04b31e689a8599fb' (2023-08-01)
• Updated input 'flake-parts/nixpkgs-lib':
    'github:NixOS/nixpkgs/da45bf6ec7bbcc5d1e14d3795c025199f28e0de0?dir=lib' (2023-04-30)
  → 'github:NixOS/nixpkgs/9e1960bc196baf6881340d53dccb203a951745a2?dir=lib' (2023-08-01)
• Updated input 'flake-root':
    'github:srid/flake-root/f1c0b93d05bdbea6c011136ba1a135c80c5b326c' (2023-04-08)
  → 'github:srid/flake-root/d9a70d9c7a5fd7f3258ccf48da9335e9b47c3937' (2023-08-22)
• Updated input 'mission-control':
    'github:Platonic-Systems/mission-control/a0c93bd764a3c25e6999397e9f5f119c1b124e38' (2023-05-09)
  → 'github:Platonic-Systems/mission-control/9d25d9f8d610916fc144f6afc1f064392fbeec1c' (2023-07-28)
• Updated input 'nix2container':
    'github:nlewo/nix2container/2e0a633344489b3171afe136b820b4602f9d1807' (2023-05-16)
  → 'github:nlewo/nix2container/ab381a7d714ebf96a83882264245dbd34f0a7ec8' (2023-07-09)
• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/5e871d8aa6f57cc8e0dc087d1c5013f6e212b4ce' (2023-05-29)
  → 'github:NixOS/nixpkgs/3efb0f6f404ec8dae31bdb1a9b17705ce0d6986e' (2023-08-28)
• Updated input 'treefmt-nix':
    'github:numtide/treefmt-nix/3d352b2b1a46164443aa114bd29d8d208d8a9bd0' (2023-05-30)
  → 'github:numtide/treefmt-nix/6befd3b6b8544952e0261f054cf16769294bacba' (2023-08-28)
• Updated input 'treefmt-nix/nixpkgs':
    'github:nixos/nixpkgs/d9f759f2ea8d265d974a6e1259bd510ac5844c5d' (2023-04-08)
  → 'github:nixos/nixpkgs/ce5e4a6ef2e59d89a971bc434ca8ca222b9c7f5e' (2023-08-10)

* install shell completions in `Nix Flake`

* add GitHub Actions workflow for checking `Nix Flake`

3 files changed, 95 insertions, 43 deletions

diff --git a/.github/workflows/nix.yaml b/.github/workflows/nix.yaml
new file mode 100644
index 0000000..fbc848e
--- /dev/null
+++ b/.github/workflows/nix.yaml
@@ -0,0 +1,24 @@
+name: "Nix Flakes"
+
+on:
+  push:
+    branches: [dev, main]
+
+  pull_request:
+    branches: [dev, main]
+
+jobs:
+  build-nix-flake:
+    name: Build Nix Flake
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Install Nix
+        uses: cachix/install-nix-action@v22
+
+      - name: Build Nix Flake
+        run: nix build
+
+      - name: Test executable
+        run: ./result/bin/joshuto version
diff --git a/flake.lock b/flake.lock
index cac9530..bc35852 100644
--- a/flake.lock
+++ b/flake.lock
@@ -8,11 +8,11 @@
         "pre-commit-hooks": "pre-commit-hooks"
       },
       "locked": {
-        "lastModified": 1685458650,
-        "narHash": "sha256-QbhHZ13NM5YjEOT9FxVP1mZON5OvZr80/BNKaVqoRRo=",
+        "lastModified": 1693363254,
+        "narHash": "sha256-le4CbQz8rKheEkGZcZzmx1ycCQ4tjFMAkcpu3Uq+tEk=",
         "owner": "cachix",
         "repo": "devenv",
-        "rev": "8d6d129b666778538b76bcb069ab82f813094e5c",
+        "rev": "3654eb5d47218cfa2d12280ba5ac1ace0a9dd225",
         "type": "github"
       },
       "original": {
@@ -29,11 +29,11 @@
         "rust-analyzer-src": "rust-analyzer-src"
       },
       "locked": {
-        "lastModified": 1685427675,
-        "narHash": "sha256-fWvqK8RhC6LABuUM7JL+loHhoRFcJx8rkAXGroVeKKw=",
+        "lastModified": 1693290084,
+        "narHash": "sha256-BMN2Sf1yuv5pw2koZZdMCCaghUYyo0hOtxY/v2zmiL8=",
         "owner": "nix-community",
         "repo": "fenix",
-        "rev": "9ea56d5de762971f6a7319711bae0532ca454dc9",
+        "rev": "76e468cd74a08edcbabb14ce1698ebd2f5fad9d2",
         "type": "github"
       },
       "original": {
@@ -63,11 +63,11 @@
         "nixpkgs-lib": "nixpkgs-lib"
       },
       "locked": {
-        "lastModified": 1685457039,
-        "narHash": "sha256-bEFtQm+YyLxQjKQAaBHJyPN1z2wbhBnr2g1NJWSYjwM=",
+        "lastModified": 1690933134,
+        "narHash": "sha256-ab989mN63fQZBFrkk4Q8bYxQCktuHmBIBqUG1jl6/FQ=",
         "owner": "hercules-ci",
         "repo": "flake-parts",
-        "rev": "80717d11615b6f42d1ad2e18ead51193fc15de69",
+        "rev": "59cf3f1447cfc75087e7273b04b31e689a8599fb",
         "type": "github"
       },
       "original": {
@@ -77,11 +77,11 @@
     },
     "flake-root": {
       "locked": {
-        "lastModified": 1680964220,
-        "narHash": "sha256-dIdTYcf+KW9a4pKHsEbddvLVSfR1yiAJynzg2x0nfWg=",
+        "lastModified": 1692742795,
+        "narHash": "sha256-f+Y0YhVCIJ06LemO+3Xx00lIcqQxSKJHXT/yk1RTKxw=",
         "owner": "srid",
         "repo": "flake-root",
-        "rev": "f1c0b93d05bdbea6c011136ba1a135c80c5b326c",
+        "rev": "d9a70d9c7a5fd7f3258ccf48da9335e9b47c3937",
         "type": "github"
       },
       "original": {
@@ -91,12 +91,15 @@
       }
     },
     "flake-utils": {
+      "inputs": {
+        "systems": "systems"
+      },
       "locked": {
-        "lastModified": 1667395993,
-        "narHash": "sha256-nuEHfE/LcWyuSWnS8t12N1wc105Qtau+/OdUAjtQ0rA=",
+        "lastModified": 1685518550,
+        "narHash": "sha256-o2d0KcvaXzTrPRIo0kOLV0/QXHhDQ5DTi+OxcjO8xqY=",
         "owner": "numtide",
         "repo": "flake-utils",
-        "rev": "5aed5285a952e0b949eb3ba02c12fa4fcfef535f",
+        "rev": "a1720a10a6cfe8234c0e93907ffe81be440f4cef",
         "type": "github"
       },
       "original": {
@@ -160,11 +163,11 @@
     },
     "mission-control": {
       "locked": {
-        "lastModified": 1683658484,
-        "narHash": "sha256-JkGnWyYZxOnyOhztrxLSqaod6+O/3rRypq0dAqA/zn0=",
+        "lastModified": 1690573269,
+        "narHash": "sha256-9NSmHRQvzBzfuKD3zHE2fM5xPa+hHSy7xcWQqZaCjFw=",
         "owner": "Platonic-Systems",
         "repo": "mission-control",
-        "rev": "a0c93bd764a3c25e6999397e9f5f119c1b124e38",
+        "rev": "9d25d9f8d610916fc144f6afc1f064392fbeec1c",
         "type": "github"
       },
       "original": {
@@ -220,11 +223,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1684252411,
-        "narHash": "sha256-4T89zvNljrrErlsiWG/u9/AY3qj6KXeiaa/Mpx0SEsk=",
+        "lastModified": 1688922987,
+        "narHash": "sha256-RnQwrCD5anqWfyDAVbfFIeU+Ha6cwt5QcIwIkaGRzQw=",
         "owner": "nlewo",
         "repo": "nix2container",
-        "rev": "2e0a633344489b3171afe136b820b4602f9d1807",
+        "rev": "ab381a7d714ebf96a83882264245dbd34f0a7ec8",
         "type": "github"
       },
       "original": {
@@ -252,11 +255,11 @@
     "nixpkgs-lib": {
       "locked": {
         "dir": "lib",
-        "lastModified": 1682879489,
-        "narHash": "sha256-sASwo8gBt7JDnOOstnps90K1wxmVfyhsTPPNTGBPjjg=",
+        "lastModified": 1690881714,
+        "narHash": "sha256-h/nXluEqdiQHs1oSgkOOWF+j8gcJMWhwnZ9PFabN6q0=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "da45bf6ec7bbcc5d1e14d3795c025199f28e0de0",
+        "rev": "9e1960bc196baf6881340d53dccb203a951745a2",
         "type": "github"
       },
       "original": {
@@ -285,27 +288,27 @@
     },
     "nixpkgs-stable": {
       "locked": {
-        "lastModified": 1678872516,
-        "narHash": "sha256-/E1YwtMtFAu2KUQKV/1+KFuReYPANM2Rzehk84VxVoc=",
+        "lastModified": 1685801374,
+        "narHash": "sha256-otaSUoFEMM+LjBI1XL/xGB5ao6IwnZOXc47qhIgJe8U=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "9b8e5abb18324c7fe9f07cb100c3cd4a29cda8b8",
+        "rev": "c37ca420157f4abc31e26f436c1145f8951ff373",
         "type": "github"
       },
       "original": {
         "owner": "NixOS",
-        "ref": "nixos-22.11",
+        "ref": "nixos-23.05",
         "repo": "nixpkgs",
         "type": "github"
       }
     },
     "nixpkgs_2": {
       "locked": {
-        "lastModified": 1685383865,
-        "narHash": "sha256-3uQytfnotO6QJv3r04ajSXbEFMII0dUtw0uqYlZ4dbk=",
+        "lastModified": 1693250523,
+        "narHash": "sha256-y3up5gXMTbnCsXrNEB5j+7TVantDLUYyQLu/ueiXuyg=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "5e871d8aa6f57cc8e0dc087d1c5013f6e212b4ce",
+        "rev": "3efb0f6f404ec8dae31bdb1a9b17705ce0d6986e",
         "type": "github"
       },
       "original": {
@@ -317,11 +320,11 @@
     },
     "nixpkgs_3": {
       "locked": {
-        "lastModified": 1680945546,
-        "narHash": "sha256-8FuaH5t/aVi/pR1XxnF0qi4WwMYC+YxlfdsA0V+TEuQ=",
+        "lastModified": 1691654369,
+        "narHash": "sha256-gSILTEx1jRaJjwZxRlnu3ZwMn1FVNk80qlwiCX8kmpo=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "d9f759f2ea8d265d974a6e1259bd510ac5844c5d",
+        "rev": "ce5e4a6ef2e59d89a971bc434ca8ca222b9c7f5e",
         "type": "github"
       },
       "original": {
@@ -346,11 +349,11 @@
         "nixpkgs-stable": "nixpkgs-stable"
       },
       "locked": {
-        "lastModified": 1682596858,
-        "narHash": "sha256-Hf9XVpqaGqe/4oDGr30W8HlsWvJXtMsEPHDqHZA6dDg=",
+        "lastModified": 1688056373,
+        "narHash": "sha256-2+SDlNRTKsgo3LBRiMUcoEUb6sDViRNQhzJquZ4koOI=",
         "owner": "cachix",
         "repo": "pre-commit-hooks.nix",
-        "rev": "fb58866e20af98779017134319b5663b8215d912",
+        "rev": "5843cf069272d92b60c3ed9e55b7a8989c01d4c7",
         "type": "github"
       },
       "original": {
@@ -375,11 +378,11 @@
     "rust-analyzer-src": {
       "flake": false,
       "locked": {
-        "lastModified": 1685378411,
-        "narHash": "sha256-Ufkqek5m8GzV3cz3Mw7bc0hO1d5hN0cO5BoTAK303K8=",
+        "lastModified": 1693248848,
+        "narHash": "sha256-TIroiasNKgsVHEjO4y8fBPHgFON1t91DMmOaXNLixXM=",
         "owner": "rust-lang",
         "repo": "rust-analyzer",
-        "rev": "bc8295255c5bcc293251d47590dcbfd320eaab87",
+        "rev": "62268e474e9165de0cdb08d3794eec4b6ef1c6cd",
         "type": "github"
       },
       "original": {
@@ -389,16 +392,31 @@
         "type": "github"
       }
     },
+    "systems": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    },
     "treefmt-nix": {
       "inputs": {
         "nixpkgs": "nixpkgs_3"
       },
       "locked": {
-        "lastModified": 1685455340,
-        "narHash": "sha256-yv72jHfXgSLrq/gDPZQfDmKJLEibz2wbCeimr6b4NF4=",
+        "lastModified": 1693247164,
+        "narHash": "sha256-M6qZo8H8fBFnipCy6q6RlpSXF3sDvfTEtyFwdAP7juM=",
         "owner": "numtide",
         "repo": "treefmt-nix",
-        "rev": "3d352b2b1a46164443aa114bd29d8d208d8a9bd0",
+        "rev": "6befd3b6b8544952e0261f054cf16769294bacba",
         "type": "github"
       },
       "original": {
diff --git a/nix/default.nix b/nix/default.nix
index 60e1981..ca449c8 100644
--- a/nix/default.nix
+++ b/nix/default.nix
@@ -1,6 +1,7 @@
 { lib
 , stdenv
 , rustPlatform
+, installShellFiles
 , darwin
 , version ? "git"
 }:
@@ -22,6 +23,15 @@ rustPlatform.buildRustPackage rec {
     darwin.apple_sdk.frameworks.Foundation
   ];
 
+  nativeBuildInputs = [ installShellFiles ];
+
+  postInstall = ''
+    installShellCompletion --cmd joshuto \
+      --bash <($out/bin/joshuto completions bash) \
+      --zsh <($out/bin/joshuto completions zsh) \
+      --fish <($out/bin/joshuto completions fish)
+  '';
+
   patchPhase = ''
     sed -i 's/env!("CARGO_PKG_VERSION")/\"${version}\"/g' src/main.rs
   '';