Rename app to radiantwave: embed and provision assets, drop proclamations

internal/assets/assets.go

@@ -0,0 +1,50 @@
+// Package assets provisions the static assets bundled into the binary
+// (fonts, shaders, and terms-of-service pages) into a per-user assets
+// directory at application startup.
+package assets
+
+import (
+	"fmt"
+	"io"
+	"io/fs"
+	"os"
+	"path/filepath"
+)
+
+// Provision copies every file from the embedded filesystem into destDir,
+// preserving the relative directory structure. Existing files are
+// overwritten so the deployed assets always match the running binary.
+func Provision(bundled fs.FS, destDir string) error {
+	return fs.WalkDir(bundled, ".", func(path string, d fs.DirEntry, err error) error {
+		if err != nil {
+			return err
+		}
+		if d.IsDir() {
+			return nil
+		}
+
+		src, err := bundled.Open(path)
+		if err != nil {
+			return fmt.Errorf("opening bundled asset %s: %w", path, err)
+		}
+		defer src.Close()
+
+		dst := filepath.Join(destDir, filepath.FromSlash(path))
+		if err := os.MkdirAll(filepath.Dir(dst), 0755); err != nil {
+			return fmt.Errorf("creating asset directory for %s: %w", path, err)
+		}
+
+		out, err := os.OpenFile(dst, os.O_CREATE|os.O_WRONLY|os.O_TRUNC, 0644)
+		if err != nil {
+			return fmt.Errorf("creating asset file %s: %w", dst, err)
+		}
+		if _, err := io.Copy(out, src); err != nil {
+			out.Close()
+			return fmt.Errorf("writing asset file %s: %w", dst, err)
+		}
+		if err := out.Close(); err != nil {
+			return fmt.Errorf("closing asset file %s: %w", dst, err)
+		}
+		return nil
+	})
+}

internal/assets/assets_test.go

@@ -0,0 +1,65 @@
+package assets
+
+import (
+	"embed"
+	"os"
+	"path/filepath"
+	"testing"
+)
+
+//go:embed testdata
+var testFS embed.FS
+
+func TestProvisionCopiesBundledFiles(t *testing.T) {
+	dest := t.TempDir()
+
+	if err := Provision(testFS, dest); err != nil {
+		t.Fatalf("Provision returned error: %v", err)
+	}
+
+	for _, rel := range []string{
+		"testdata/fonts/TestFont.ttf",
+		"testdata/shaders/solid_color.frag",
+		"testdata/shaders/solid_color.vert",
+		"testdata/tos/01 - WELCOME.html",
+	} {
+		got, err := os.ReadFile(filepath.Join(dest, filepath.FromSlash(rel)))
+		if err != nil {
+			t.Errorf("expected %s to be provisioned: %v", rel, err)
+			continue
+		}
+		want, err := testFS.ReadFile(rel)
+		if err != nil {
+			t.Fatalf("reading fixture %s: %v", rel, err)
+		}
+		if string(got) != string(want) {
+			t.Errorf("provisioned %s content mismatch", rel)
+		}
+	}
+}
+
+func TestProvisionOverwritesStaleFiles(t *testing.T) {
+	dest := t.TempDir()
+
+	// Plant a stale shader that differs from the bundled one.
+	stalePath := filepath.Join(dest, "testdata", "shaders", "solid_color.vert")
+	if err := os.MkdirAll(filepath.Dir(stalePath), 0755); err != nil {
+		t.Fatal(err)
+	}
+	if err := os.WriteFile(stalePath, []byte("stale content"), 0644); err != nil {
+		t.Fatal(err)
+	}
+
+	if err := Provision(testFS, dest); err != nil {
+		t.Fatalf("Provision returned error: %v", err)
+	}
+
+	got, err := os.ReadFile(stalePath)
+	if err != nil {
+		t.Fatalf("reading provisioned file: %v", err)
+	}
+	want, _ := testFS.ReadFile("testdata/shaders/solid_color.vert")
+	if string(got) != string(want) {
+		t.Errorf("stale file was not overwritten: got %q want %q", got, want)
+	}
+}

internal/assets/testdata/fonts/TestFont.ttf

@@ -0,0 +1 @@
+fake-font-bytes

internal/assets/testdata/shaders/solid_color.frag

@@ -0,0 +1 @@
+fake-frag

internal/assets/testdata/shaders/solid_color.vert

@@ -0,0 +1 @@
+fake-vert

internal/assets/testdata/tos/01 - WELCOME.html

@@ -0,0 +1 @@
+<html>welcome</html>