opencode

internal/opencode/plugin.go

@@ -0,0 +1,40 @@
+// Package opencode provides OpenCode plugin management.
+package opencode
+
+import (
+	"embed"
+	"fmt"
+	"os"
+	"path/filepath"
+)
+
+//go:embed plugin/gastown.js
+var pluginFS embed.FS
+
+// EnsurePluginAt ensures the Gas Town OpenCode plugin exists.
+// If the file already exists, it's left unchanged.
+func EnsurePluginAt(workDir, pluginDir, pluginFile string) error {
+	if pluginDir == "" || pluginFile == "" {
+		return nil
+	}
+
+	pluginPath := filepath.Join(workDir, pluginDir, pluginFile)
+	if _, err := os.Stat(pluginPath); err == nil {
+		return nil
+	}
+
+	if err := os.MkdirAll(filepath.Dir(pluginPath), 0755); err != nil {
+		return fmt.Errorf("creating plugin directory: %w", err)
+	}
+
+	content, err := pluginFS.ReadFile("plugin/gastown.js")
+	if err != nil {
+		return fmt.Errorf("reading plugin template: %w", err)
+	}
+
+	if err := os.WriteFile(pluginPath, content, 0644); err != nil {
+		return fmt.Errorf("writing plugin: %w", err)
+	}
+
+	return nil
+}