chore: configure Git Town (#26)

* chore: configure Git Town

Signed-off-by: izzy <me@insrt.uk>

* chore: add default.nix for mise

Signed-off-by: izzy <me@insrt.uk>

---------

Signed-off-by: izzy <me@insrt.uk>

.github/workflows/git-town.yml

@@ -0,0 +1,19 @@
+name: Git Town
+
+on:
+  pull_request:
+
+jobs:
+  git-town:
+    name: Display the branch stack
+    runs-on: ubuntu-slim
+
+    if: ${{ !startsWith(github.head_ref, 'release-please--') }}
+
+    permissions:
+      contents: read
+      pull-requests: write
+
+    steps:
+      - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
+      - uses: git-town/action@e483957e6d4827e62413707d4c8f9678c9dc19f1 # v1.3.2

.mise/config.toml

@@ -0,0 +1,7 @@
+[tools]
+node = "25.4.0"
+pnpm = "10.28.1"
+restic = "0.18.0"
+
+gh = "2.25.0"
+"github:git-town/git-town" = "22.4.0"

default.nix

@@ -0,0 +1,54 @@
+{ pkgs ? import (fetchTarball {
+    url = "https://github.com/NixOS/nixpkgs/archive/77ef7a29d276c6d8303aece3444d61118ef71ac2.tar.gz";
+    sha256 = "0pm4l48jq8plzrrrisimahxqlcpx7qqq9c99hylmf7p3zlc3phsy";
+  }) {},
+
+  # Playwright v1.57.0
+  unstablePkgs ? import (fetchTarball {
+    url = "https://github.com/NixOS/nixpkgs/archive/145b67bd0bd4e075f981c1c2b81155d9e2982de2.tar.gz";
+    sha256 = "152qwxacs6lw1dskn21985qly8ipjzwpsvicy7inzh3hhma603gg";
+  }) {},
+}:
+
+let
+  nix-ld-libs = pkgs.buildEnv {
+    name = "nix-ld-libs";
+    paths = with pkgs; [
+      stdenv.cc.cc.lib
+      zlib
+      openssl
+    ];
+  };
+
+in pkgs.mkShell {
+  packages = with pkgs; [
+    mise
+    lsof
+    pkg-config
+    openssl.dev
+    (writeShellScriptBin "fish" ''
+      exec ${pkgs.fish}/bin/fish -C 'mise activate fish | source' "$@"
+    '')
+  ];
+
+  shellHook = ''
+    export NIX_LD="${pkgs.stdenv.cc.libc}/lib/ld-linux-x86-64.so.2"
+    export NIX_LD_LIBRARY_PATH="${nix-ld-libs}/lib"
+
+    export MISE_NODE_COMPILE=false
+    eval "$(mise activate bash)"
+
+    export PLAYWRIGHT_BROWSERS_PATH=${unstablePkgs.playwright-driver.browsers}
+    export PLAYWRIGHT_SKIP_VALIDATE_HOST_REQUIREMENTS=true
+
+    playwrightNpmVersion="$(npm show @playwright/test version)"
+    echo "❄️  Playwright nix version: ${unstablePkgs.playwright.version}"
+    echo "📦 Playwright npm version: $playwrightNpmVersion"
+
+    if [ "${unstablePkgs.playwright.version}" != "$playwrightNpmVersion" ]; then
+      echo "❌ Playwright versions in nix and npm are not the same!"
+    else
+      echo "✅ Playwright versions in nix and npm are the same"
+    fi
+  '';
+}

git-town.toml

@@ -0,0 +1,8 @@
+# See https://www.git-town.com/configuration-file for details
+
+[branches]
+main = "main"
+
+[hosting]
+forge-type = "github"
+github-connector = "gh"