Add InstallScriptBuilder + GET /install.sh + GET /client.tar.gz

backend.tests/InstallEndpointsTests.cs

@@ -0,0 +1,55 @@
+using System.Net;
+using FluentAssertions;
+using Microsoft.AspNetCore.Hosting;
+using Microsoft.Extensions.Configuration;
+using Xunit;
+
+namespace backend.tests;
+
+public class InstallEndpointsTests
+{
+    [Fact]
+    public async Task Install_sh_returns_shell_script_with_request_host()
+    {
+        using var factory = new ApiFactory();
+        var client = factory.CreateClient();
+        var res = await client.GetAsync("/install.sh");
+        res.StatusCode.Should().Be(HttpStatusCode.OK);
+        res.Content.Headers.ContentType!.MediaType.Should().Be("text/x-shellscript");
+
+        var body = await res.Content.ReadAsStringAsync();
+        body.Should().StartWith("#!/usr/bin/env bash");
+        body.Should().Contain("BACKEND_URL=\"http://localhost\"");
+    }
+
+    [Fact]
+    public async Task Client_tarball_returns_octet_stream()
+    {
+        var tmp = Path.Combine(Path.GetTempPath(), $"client-test-{Guid.NewGuid():N}.tar.gz");
+        File.WriteAllBytes(tmp, new byte[] { 0x1f, 0x8b }); // tiny gzip-ish marker
+
+        try
+        {
+            using var factory = new ApiFactory();
+            var client = factory.WithWebHostBuilder(b =>
+            {
+                b.ConfigureAppConfiguration((_, cfg) =>
+                {
+                    cfg.AddInMemoryCollection(new Dictionary<string, string?>
+                    {
+                        ["Install:ClientTarballPath"] = tmp,
+                    });
+                });
+            }).CreateClient();
+
+            var res = await client.GetAsync("/client.tar.gz");
+            res.StatusCode.Should().Be(HttpStatusCode.OK);
+            res.Content.Headers.ContentType!.MediaType.Should().Be("application/gzip");
+            (await res.Content.ReadAsByteArrayAsync()).Length.Should().Be(2);
+        }
+        finally
+        {
+            if (File.Exists(tmp)) File.Delete(tmp);
+        }
+    }
+}

backend.tests/InstallScriptBuilderTests.cs

@@ -0,0 +1,18 @@
+using backend.Install;
+using FluentAssertions;
+using Xunit;
+
+namespace backend.tests;
+
+public class InstallScriptBuilderTests
+{
+    [Fact]
+    public void Build_inlines_the_backend_url_into_the_script()
+    {
+        var script = new InstallScriptBuilder().Build("https://example.test");
+        script.Should().Contain("BACKEND_URL=\"https://example.test\"");
+        script.Should().Contain("#!/usr/bin/env bash");
+        script.Should().Contain("$BACKEND_URL/client.tar.gz");
+        script.Should().Contain("client.pair");
+    }
+}

backend/Install/InstallEndpoints.cs

@@ -0,0 +1,28 @@
+using Microsoft.Extensions.Configuration;
+
+namespace backend.Install;
+
+public static class InstallEndpoints
+{
+    public static IEndpointRouteBuilder MapInstallEndpoints(this IEndpointRouteBuilder app)
+    {
+        app.MapGet("/install.sh", (HttpContext http, InstallScriptBuilder builder) =>
+        {
+            var scheme = http.Request.Scheme;
+            var host = http.Request.Host.ToString();
+            var script = builder.Build($"{scheme}://{host}");
+            return Results.Text(script, "text/x-shellscript");
+        });
+
+        app.MapGet("/client.tar.gz", (IConfiguration cfg, IWebHostEnvironment env) =>
+        {
+            var path = cfg["Install:ClientTarballPath"]
+                ?? Path.Combine(env.WebRootPath ?? "wwwroot", "client.tar.gz");
+            if (!File.Exists(path))
+                return Results.NotFound(new { error = "client.tar.gz not found at " + path });
+            return Results.File(path, "application/gzip", "client.tar.gz");
+        });
+
+        return app;
+    }
+}

backend/Install/InstallScriptBuilder.cs

@@ -0,0 +1,70 @@
+namespace backend.Install;
+
+public class InstallScriptBuilder
+{
+    public string Build(string backendUrl)
+    {
+        return $$"""
+#!/usr/bin/env bash
+# Smart Assistant installer (idempotent). Re-run to upgrade.
+set -euo pipefail
+
+BACKEND_URL="{{backendUrl}}"
+ASSISTANT_HOME="$HOME/assistant"
+RESET=0
+for arg in "$@"; do
+    case "$arg" in
+        --reset) RESET=1 ;;
+    esac
+done
+
+echo "Installing system deps (sudo password may be prompted)..."
+sudo apt-get update -qq
+sudo apt-get install -y --no-install-recommends python3-venv libportaudio2 alsa-utils
+
+mkdir -p "$ASSISTANT_HOME/code" "$ASSISTANT_HOME/state"
+
+if [ ! -d "$ASSISTANT_HOME/.venv" ]; then
+    python3 -m venv "$ASSISTANT_HOME/.venv"
+fi
+
+echo "Downloading client bundle from $BACKEND_URL ..."
+curl -fsSL "$BACKEND_URL/client.tar.gz" | tar -xz -C "$ASSISTANT_HOME/code"
+
+"$ASSISTANT_HOME/.venv/bin/pip" install --quiet -r "$ASSISTANT_HOME/code/requirements.txt"
+"$ASSISTANT_HOME/.venv/bin/pip" install --quiet --no-deps -r "$ASSISTANT_HOME/code/requirements-nodeps.txt"
+
+if [ "$RESET" -eq 1 ]; then
+    rm -f "$ASSISTANT_HOME/state/config.json"
+fi
+
+if [ ! -f "$ASSISTANT_HOME/state/config.json" ]; then
+    echo
+    read -r -p "Pairing code: " CODE
+    "$ASSISTANT_HOME/.venv/bin/python" -m client.pair --backend "$BACKEND_URL" --code "$CODE"
+fi
+
+mkdir -p "$HOME/.config/systemd/user"
+cat > "$HOME/.config/systemd/user/assistant.service" <<UNIT
+[Unit]
+Description=Smart Assistant Pi client
+After=network-online.target
+
+[Service]
+Environment=PA_ALSA_PLUGHW=1
+ExecStart=$ASSISTANT_HOME/.venv/bin/python -m client.main
+WorkingDirectory=$ASSISTANT_HOME/code
+Restart=on-failure
+RestartSec=5
+
+[Install]
+WantedBy=default.target
+UNIT
+
+loginctl enable-linger "$USER" 2>/dev/null || true
+systemctl --user daemon-reload
+systemctl --user enable --now assistant
+echo "Done. systemctl --user status assistant"
+""";
+    }
+}

backend/Program.cs

@@ -1,6 +1,7 @@
 using backend.Auth;
 using backend.Data;
 using backend.Devices;
+using backend.Install;
 using backend.Pairing;
 using Microsoft.EntityFrameworkCore;
 
@@ -14,6 +15,7 @@ builder.Services.AddAuthorization();
 
 builder.Services.AddScoped<backend.Devices.DeviceTokenService>();
 builder.Services.AddScoped<backend.Pairing.PairingService>();
+builder.Services.AddSingleton<backend.Install.InstallScriptBuilder>();
 
 var app = builder.Build();
 
@@ -37,6 +39,7 @@ app.UseAuthorization();
 app.MapAuthEndpoints();
 app.MapPairingEndpoints();
 app.MapDevicesEndpoints();
+app.MapInstallEndpoints();
 
 app.MapGet("/health", () => Results.Ok(new { ok = true }));