Add Nix flake for devenv.sh / NixOS integration

.goreleaser.yaml

@@ -48,5 +48,20 @@ brews:
       name: homebrew-tap
       token: "{{ .Env.TAP_GITHUB_TOKEN }}"
 
+nix:
+  # Publishes a Nix derivation that installs pre-built binaries to
+  # the mickamy/nur-packages repository on each release.
+  # Prerequisites:
+  #   1. Create the mickamy/nur-packages repository (NUR-compatible layout).
+  #   2. Add "install nix" step to the release workflow so nix-hash is available.
+  - name: sql-tap
+    homepage: https://github.com/mickamy/sql-tap
+    description: Watch SQL traffic in real-time with a TUI
+    license: mit
+    repository:
+      owner: mickamy
+      name: nur-packages
+      token: "{{ .Env.TAP_GITHUB_TOKEN }}"
+
 changelog:
   sort: asc

README.md

@@ -34,6 +34,35 @@ cd sql-tap
 make install
 ```
 
+### Nix
+
+**Using the flake directly**
+
+```bash
+nix profile install github:mickamy/sql-tap
+```
+
+**In a `devenv.sh` project**
+
+Add `sql-tap` as a flake input in `devenv.yaml`:
+
+```yaml
+inputs:
+  sql-tap:
+    url: github:mickamy/sql-tap
+```
+
+Then reference it in `devenv.nix`:
+
+```nix
+{ inputs, pkgs, ... }:
+{
+  packages = [
+    inputs.sql-tap.packages.${pkgs.system}.default
+  ];
+}
+```
+
 ### Docker
 
 **PostgreSQL**

flake.nix

@@ -0,0 +1,58 @@
+{
+  description = "Real-time SQL traffic viewer — proxy daemon + TUI / Web client";
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
+    flake-utils.url = "github:numtide/flake-utils";
+  };
+
+  outputs =
+    { self
+    , nixpkgs
+    , flake-utils
+    }:
+    flake-utils.lib.eachDefaultSystem (system:
+      let
+        pkgs = nixpkgs.legacyPackages.${system};
+        version = self.shortRev or self.dirtyShortRev or "dev";
+      in
+      {
+        packages = {
+          sql-tap = pkgs.buildGoModule {
+            pname = "sql-tap";
+            inherit version;
+            src = pkgs.lib.cleanSource self;
+            subPackages = [ "." "cmd/sql-tapd" ];
+
+            # When go.mod or go.sum changes, update this hash by running:
+            #   nix build 2>&1 | grep "got:" | awk '{print $2}'
+            # and replacing pkgs.lib.fakeHash below with the output.
+            vendorHash = pkgs.lib.fakeHash;
+
+            ldflags = [
+              "-s"
+              "-w"
+              "-X main.version=${version}"
+            ];
+
+            meta = with pkgs.lib; {
+              description = "Watch SQL traffic in real-time with a TUI";
+              longDescription = ''
+                sql-tap sits between your application and your database
+                (PostgreSQL, MySQL, or TiDB), capturing every query and
+                displaying it in an interactive terminal UI. Inspect queries,
+                view transactions, and run EXPLAIN — all without changing your
+                application code.
+              '';
+              homepage = "https://github.com/mickamy/sql-tap";
+              license = licenses.mit;
+              maintainers = [ ];
+              mainProgram = "sql-tap";
+              platforms = platforms.unix;
+            };
+          };
+          default = self.packages.${system}.sql-tap;
+        };
+      }
+    );
+}