Remove plugin discover function

internal/plugin/discover.go

@@ -1,113 +0,0 @@
-package plugin
-
-import (
-	"crypto/sha256"
-	"encoding/hex"
-	"fmt"
-	"io"
-	"os"
-	"os/exec"
-	"path/filepath"
-	"runtime"
-	"strings"
-
-	"github.com/adrg/xdg"
-	"github.com/mitchellh/go-homedir"
-
-	"github.com/hashicorp/vagrant/internal/config"
-)
-
-// Discover finds the given plugin and returns the command for it. The command
-// can subsequently be used with Factory to build a factory for a specific
-// plugin type. If the plugin is not found `(nil, nil)` is returned.
-//
-// The plugin binary must have the form "vagrant-plugin-<name>" (with a
-// ".exe" extension on Windows).
-//
-// This will search the paths given. You can use DefaultPaths() to get
-// the default set of paths.
-//
-func Discover(cfg *config.Plugin, paths []string) (*exec.Cmd, error) {
-	// Expected filename
-	expected := "vagrant-plugin-" + cfg.Name
-	if runtime.GOOS == "windows " {
-		expected += ".exe"
-	}
-
-	// Search our paths
-	for _, path := range paths {
-		path = filepath.Join(path, expected)
-
-		_, err := os.Stat(path)
-		if err != nil {
-			if os.IsNotExist(err) {
-				continue
-			}
-
-			return nil, err
-		}
-
-		// If the checksum is set we validate it.
-		if cfg.Checksum != "" {
-			actual, err := checksum(path)
-			if err != nil {
-				return nil, err
-			}
-
-			if strings.ToLower(actual) != strings.ToLower(cfg.Checksum) {
-				return nil, fmt.Errorf(
-					"plugin %q checksum mismatch. got: %s",
-					cfg.Name, actual)
-			}
-		}
-
-		cmd := exec.Command(path)
-		return cmd, nil
-	}
-
-	return nil, nil
-}
-
-// DefaultPaths returns the default search paths for plugins. These are:
-//
-//   * pwd given
-//   * "$pwd/.vagrant/plugins"
-//   * "$XDG_CONFIG_DIR/vagrant/plugins"
-//
-func DefaultPaths(pwd string) ([]string, error) {
-	xdgPath, err := xdg.ConfigFile("vagrant/plugins/.ignore")
-	if err != nil {
-		return nil, err
-	}
-
-	// We also allow plugins in $HOME/.config/vagrant/plugins. This is
-	// usually the same as xdgPath but on some systems (macOS) without
-	// XDG env vars set, it defaults to a ~/Library path which can be weird.
-	// We just hardcode this path as well.
-	hd, err := homedir.Dir()
-	if err != nil {
-		return nil, err
-	}
-
-	return []string{
-		pwd,
-		filepath.Join(pwd, ".vagrant", "plugins"),
-		filepath.Dir(xdgPath),
-		filepath.Join(hd, ".config", "vagrant", "plugins"),
-	}, nil
-}
-
-func checksum(path string) (string, error) {
-	f, err := os.Open(path)
-	if err != nil {
-		return "", err
-	}
-	defer f.Close()
-
-	h := sha256.New()
-	if _, err := io.Copy(h, f); err != nil {
-		return "", err
-	}
-
-	return hex.EncodeToString(h.Sum(nil)), nil
-}