feat(vendordep): add vendordep management

- Add vendordep add
- Add vendordep remove
- Add vendordep list
- Refactor downloading

cmd/root.go

@@ -1,12 +1,19 @@
 package cmd
 
 import (
+	"io/fs"
+	"log/slog"
 	"os"
+	"path/filepath"
 	"rph/state"
+	"rph/utils"
 
 	"github.com/spf13/cobra"
 )
 
+var projectFs fs.FS
+var projectDir string
+
 var rootCmd = &cobra.Command{
 	Use: state.Name,
 	Short: "Manage your FRC robot code the UNIX way.",
@@ -15,11 +22,62 @@ giving FRC teams a simple way to interact with wpilib robot code.
 
 rph is cross platform, and should work everywhere wpilib is supported. To
 actually run your robot code you will still need to install wpilib.`,
+	PersistentPreRunE: func(cmd *cobra.Command, args []string) error {
+		dir, err := cmd.Flags().GetString("project-dir")
+		if err != nil {
+			slog.Error("Unable to set projectFs or projectDir", "error", err)
+			os.Exit(1)
+		}
+
+		// if the user specified a directory we'll trust them
+		if dir != "." {
+			projectFs = os.DirFS(dir)
+			projectDir = dir
+			return nil
+		}
+
+		// otherwise we should go find the .wpilib folder in the parent directories
+		path, err := utils.FindEntryDirInParents(dir, ".wpilib")
+		if err != nil {
+			slog.Error("Unable to find project directory", "error", err)
+			return err
+		}
+
+		projectFs = os.DirFS(path)
+		projectDir = path
+		return nil
+	},
 }
 
 func Execute() {
+	rootCmd.PersistentFlags().String("project-dir", ".", "Set the project directory.")
+
 	err := rootCmd.Execute()
 	if err != nil {
 		os.Exit(1)
 	}
 }
+
+func superPersistentPreRun(cmd *cobra.Command, args []string) {
+	if parent := cmd.Parent(); parent != nil {
+		if parent.PersistentPreRunE != nil {
+			if err := parent.PersistentPreRunE(parent, args); err != nil {
+				return
+			}
+		} else if parent.PersistentPreRun != nil {
+			// Fallback to PersistentPreRun if PersistentPreRunE isn't set
+			parent.PersistentPreRun(parent, args)
+		}
+	}
+}
+
+// inProjectDir handles the log message for you
+func inProjectDir() bool {
+	_, err := os.Stat(filepath.Join(projectDir, ".wpilib", "wpilib_preferences.json"))
+	if err != nil {
+		slog.Error("Are you in a project directory?")
+		return false
+	}
+
+	return true
+}