added cheap way to run program from nix

YongeStreet/Services/DataService.cs

@@ -18,7 +18,7 @@ public class DataService
         "tertiary_link",
         "residential",
     "unclassified"];
-    private readonly string path = "/home/didier/dev/YongeStreet/real.duckdb";
+    private readonly string path = System.Environment.GetEnvironmentVariable("PREPROCESSED_DUCKDB_FILE") ?? "/home/didier/dev/YongeStreet/real.duckdb";
 
     public IList<Road> GetRoads(string city, DateOnly extractDate)
     {

flake.nix

@@ -102,23 +102,21 @@
           doCheck = false;
         };
 
+        static-server-url = "https://static.home.all-dressed-programming.com";
         geofabrik-base-url =
-          "https://static.home.all-dressed-programming.com/download.geofabrik.de/north-america/canada/";
+          "${static-server-url}/download.geofabrik.de/north-america/canada/";
 
         osm-quebec."2020" = pkgs.fetchurl {
           url = "${geofabrik-base-url}quebec-200101.osm.pbf";
-          hash =
-            "sha256-RYoz4Qo/xwiEVBoA4xRHHpt8kvNS/mHskJBmR4+3vQk=";
+          hash = "sha256-RYoz4Qo/xwiEVBoA4xRHHpt8kvNS/mHskJBmR4+3vQk=";
         };
         osm-quebec."2021" = pkgs.fetchurl {
           url = "${geofabrik-base-url}quebec-210101.osm.pbf";
-          hash =
-            "sha256-kKi/5hCVHaVvMVFAJWpJGPybmKwDu0QXePimYnHBKKk=";
+          hash = "sha256-kKi/5hCVHaVvMVFAJWpJGPybmKwDu0QXePimYnHBKKk=";
         };
         osm-quebec."2022" = pkgs.fetchurl {
           url = "${geofabrik-base-url}quebec-220101.osm.pbf";
-          hash =
-            "sha256-iZUm+vMiDH6eyf4kmee6O8z+lN/voyjAt4RtzmSU6Wo=";
+          hash = "sha256-iZUm+vMiDH6eyf4kmee6O8z+lN/voyjAt4RtzmSU6Wo=";
         };
         osm-quebec."2023" = pkgs.fetchurl {
           url = "${geofabrik-base-url}quebec-230101.osm.pbf";
@@ -166,17 +164,10 @@
           '';
         };
 
-        python-virtual-env = pkgs.python312.withPackages (ps: [
-          ps.matplotlib
-          ps.jupyter
-          ps.tqdm
-          ps.duckdb
-          ps.pandas
-          ps.unidecode
-          ps.geopy
-          ps.click
-          ps.jinja2
-        ]);
+        processed-duckdb-file = pkgs.fetchurl {
+          url = "${static-server-url}/yongestreet/duckdb/2025-01-06.duckdb";
+          hash = "sha256-jZEkKg/D3MOVWprVGmsc/ev2fY6TVcN3tD3NH23B2h4=";
+        };
 
         web-server = pkgs.buildDotnetModule {
           pname = "YongeStreet";
@@ -189,8 +180,35 @@
           dotnet-runtime = pkgs.dotnetCorePackages.aspnetcore_8_0;
         };
         
+        yonge-street = pkgs.writeShellApplication {
+                           name = "yong-street";
+                           runtimeInputs = [ ];
+                           text = ''
+                             cd ${web-server}/lib/YongeStreet
+                             pwd
+                             export PREPROCESSED_DUCKDB_FILE="${processed-duckdb-file}"
+                             ${web-server}/bin/YongeStreet
+                           '';
+        };
+        
+        
+
+        python-virtual-env = pkgs.python312.withPackages (ps: [
+          ps.matplotlib
+          ps.jupyter
+          ps.tqdm
+          ps.duckdb
+          ps.pandas
+          ps.unidecode
+          ps.geopy
+          ps.click
+          ps.jinja2
+        ]);
+
       in {
         packages = {
+          default = yonge-street;
+          yonge-street = yonge-street;
           historical-data-dir = historical-data-dir;
           poly2geojson = poly2geojson;
           osmosis = osmosis;