bump nixpkgs, add auto-explain option

Author: tstat

flake.lock

@@ -3,7 +3,7 @@
 
   inputs = {
     flake-utils.url = "github:numtide/flake-utils";
-    nixpkgs.url = "github:NixOS/nixpkgs/nixos-24.05";
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-25.11";
   };
 
   outputs = { self, flake-utils, nixpkgs }:
@@ -30,17 +30,11 @@
           "${package-name}" = pkgs.rustPlatform.buildRustPackage {
             pname = package-name;
             version = "0.1.0";
-            cargoSha256 = "sha256-6V1NbCW3y1GA8y8yL5hP/GVNHjdhbsvT31t2iwEfkec=";
+            cargoHash = "sha256-L8cCKVhrXbazm4NvGKWU+i571lk8zA29bvaNdxU0BDM=";
             src = ./src;
             buildInputs =
               let
-                darwin-frameworks = with pkgs.darwin.apple_sdk.frameworks;
-                  [
-                    CoreFoundation
-                    CoreServices
-                    SystemConfiguration
-                    pkgs.libiconv
-                  ];
+                darwin-frameworks = [ ];
                 system-dependent = if pkgs.stdenv.isDarwin then darwin-frameworks else [ ];
               in
               system-dependent;

flake.nix

@@ -9,6 +9,9 @@ pub struct Args {
     /// Run postgres in an existing db cluster
     #[arg(long)]
     pub use_existing_dir: bool,
+    /// Automatically configure auto-explain
+    #[arg(long)]
+    pub auto_explain: bool,
     /// Localhost port to listen on
     #[arg(short, long)]
     pub port: Option<u16>,

src/src/cli/parser/mod.rs

@@ -184,7 +184,7 @@ fn run<'a>(args: &'a cli::Args, muxer: &'a mut PgMuxer) -> Result<(), Error<'a>>
         .map_err(|e| (&args.directory as &'a Path, e))?;
     if !args.use_existing_dir {
         muxer.init_db(&args.directory)?;
-        tweak_postgresql_conf(&args.directory, args.port).unwrap();
+        tweak_postgresql_conf(&args.directory, args.auto_explain, args.port).unwrap();
     }
     muxer.run_postgres(&args.directory, args.port)?;
     if !args.use_existing_dir {
@@ -227,7 +227,7 @@ fn run<'a>(args: &'a cli::Args, muxer: &'a mut PgMuxer) -> Result<(), Error<'a>>
     Ok(())
 }
 
-fn tweak_postgresql_conf(db_path: &Path, port: Option<u16>) -> io::Result<()> {
+fn tweak_postgresql_conf(db_path: &Path, auto_explain: bool, port: Option<u16>) -> io::Result<()> {
     let mut conf_path = PathBuf::from(db_path);
     conf_path.push("postgresql.conf");
     let file = OpenOptions::new().append(true).open(conf_path)?;
@@ -236,14 +236,28 @@ fn tweak_postgresql_conf(db_path: &Path, port: Option<u16>) -> io::Result<()> {
         None => &[("listen_addresses", "")],
         Some(_) => &[],
     };
+    for (k, v) in port_options {
+        writeln!(file, "{k} = '{v}'")?;
+    }
     let options: &[(&str, &str)] = &[
         ("unix_socket_directories", db_path.to_str().unwrap()),
         ("log_connections", "on"),
         ("log_disconnections", "on"),
     ];
-    for options in [port_options, options] {
-        for (k, v) in options {
-            writeln!(file, "{k} = '{v}'")?;
+    for (k, v) in options {
+        writeln!(file, "{k} = '{v}'")?;
+    }
+    if auto_explain {
+        let auto_explain_options: &[(&str, &str)] = &[
+            ("session_preload_libraries", "'auto_explain'"),
+            ("auto_explain.log_min_duration", "0"),
+            ("auto_explain.log_analyze", "true"),
+            ("auto_explain.log_buffers", "true"),
+            ("auto_explain.log_triggers", "true"),
+            ("auto_explain.log_nested_statements", "true"),
+        ];
+        for (k, v) in auto_explain_options {
+            writeln!(file, "{k} = {v}")?;
         }
     }
     file.flush()?;