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| 1 | +// SPDX-FileCopyrightText: Copyright The Lima Authors |
| 2 | +// SPDX-License-Identifier: Apache-2.0 |
| 3 | + |
| 4 | +package registry |
| 5 | + |
| 6 | +import ( |
| 7 | + "context" |
| 8 | + "fmt" |
| 9 | + "os" |
| 10 | + "os/exec" |
| 11 | + "path/filepath" |
| 12 | + "strings" |
| 13 | + |
| 14 | + "github.com/sirupsen/logrus" |
| 15 | + |
| 16 | + "github.com/lima-vm/lima/pkg/driver" |
| 17 | + // "github.com/lima-vm/lima/pkg/driver/external/client". |
| 18 | + "github.com/lima-vm/lima/pkg/usrlocalsharelima" |
| 19 | +) |
| 20 | + |
| 21 | +type ExternalDriver struct { |
| 22 | + Name string |
| 23 | + InstanceName string |
| 24 | + Command *exec.Cmd |
| 25 | + SocketPath string |
| 26 | + // Client *client.DriverClient // Client is the gRPC client for the external driver. |
| 27 | + Path string |
| 28 | + Ctx context.Context |
| 29 | + Logger *logrus.Logger |
| 30 | + CancelFunc context.CancelFunc |
| 31 | +} |
| 32 | + |
| 33 | +var ( |
| 34 | + internalDrivers = make(map[string]driver.Driver) |
| 35 | + ExternalDrivers = make(map[string]*ExternalDriver) |
| 36 | +) |
| 37 | + |
| 38 | +func List() map[string]string { |
| 39 | + if err := discoverDrivers(); err != nil { |
| 40 | + logrus.Warnf("Error discovering drivers: %v", err) |
| 41 | + } |
| 42 | + |
| 43 | + vmTypes := make(map[string]string) |
| 44 | + for name := range internalDrivers { |
| 45 | + vmTypes[name] = "internal" |
| 46 | + } |
| 47 | + for name, d := range ExternalDrivers { |
| 48 | + vmTypes[name] = d.Path |
| 49 | + } |
| 50 | + return vmTypes |
| 51 | +} |
| 52 | + |
| 53 | +func Get(name string) (*ExternalDriver, driver.Driver, bool) { |
| 54 | + if err := discoverDrivers(); err != nil { |
| 55 | + logrus.Warnf("Error discovering drivers: %v", err) |
| 56 | + } |
| 57 | + |
| 58 | + internalDriver, exists := internalDrivers[name] |
| 59 | + if !exists { |
| 60 | + externalDriver, exists := ExternalDrivers[name] |
| 61 | + if exists { |
| 62 | + return externalDriver, nil, exists |
| 63 | + } |
| 64 | + } |
| 65 | + return nil, internalDriver, exists |
| 66 | +} |
| 67 | + |
| 68 | +func registerExternalDriver(name, path string) { |
| 69 | + if _, exists := ExternalDrivers[name]; exists { |
| 70 | + return |
| 71 | + } |
| 72 | + |
| 73 | + if _, exists := internalDrivers[name]; exists { |
| 74 | + logrus.Debugf("Driver %q is already registered as an internal driver, skipping external registration", name) |
| 75 | + return |
| 76 | + } |
| 77 | + |
| 78 | + ExternalDrivers[name] = &ExternalDriver{ |
| 79 | + Name: name, |
| 80 | + Path: path, |
| 81 | + Logger: logrus.New(), |
| 82 | + } |
| 83 | +} |
| 84 | + |
| 85 | +func discoverDrivers() error { |
| 86 | + prefix, err := usrlocalsharelima.Prefix() |
| 87 | + if err != nil { |
| 88 | + return err |
| 89 | + } |
| 90 | + stdDriverDir := filepath.Join(prefix, "libexec", "lima") |
| 91 | + |
| 92 | + logrus.Debugf("Discovering external drivers in %s", stdDriverDir) |
| 93 | + if _, err := os.Stat(stdDriverDir); err == nil { |
| 94 | + if err := discoverDriversInDir(stdDriverDir); err != nil { |
| 95 | + logrus.Warnf("Error discovering external drivers in %q: %v", stdDriverDir, err) |
| 96 | + } |
| 97 | + } |
| 98 | + |
| 99 | + if driverPaths := os.Getenv("LIMA_DRIVERS_PATH"); driverPaths != "" { |
| 100 | + paths := filepath.SplitList(driverPaths) |
| 101 | + for _, path := range paths { |
| 102 | + if path == "" { |
| 103 | + continue |
| 104 | + } |
| 105 | + |
| 106 | + info, err := os.Stat(path) |
| 107 | + if err != nil { |
| 108 | + logrus.Warnf("Error accessing external driver path %q: %v", path, err) |
| 109 | + continue |
| 110 | + } |
| 111 | + |
| 112 | + if info.IsDir() { |
| 113 | + if err := discoverDriversInDir(path); err != nil { |
| 114 | + logrus.Warnf("Error discovering external drivers in %q: %v", path, err) |
| 115 | + } |
| 116 | + } else if isExecutable(info.Mode()) { |
| 117 | + registerDriverFile(path) |
| 118 | + } |
| 119 | + } |
| 120 | + } |
| 121 | + |
| 122 | + return nil |
| 123 | +} |
| 124 | + |
| 125 | +func discoverDriversInDir(dir string) error { |
| 126 | + entries, err := os.ReadDir(dir) |
| 127 | + if err != nil { |
| 128 | + return fmt.Errorf("failed to read driver directory %q: %w", dir, err) |
| 129 | + } |
| 130 | + |
| 131 | + for _, entry := range entries { |
| 132 | + if entry.IsDir() { |
| 133 | + continue |
| 134 | + } |
| 135 | + |
| 136 | + info, err := entry.Info() |
| 137 | + if err != nil { |
| 138 | + logrus.Warnf("Failed to get info for %q: %v", entry.Name(), err) |
| 139 | + continue |
| 140 | + } |
| 141 | + |
| 142 | + if !isExecutable(info.Mode()) { |
| 143 | + continue |
| 144 | + } |
| 145 | + |
| 146 | + driverPath := filepath.Join(dir, entry.Name()) |
| 147 | + registerDriverFile(driverPath) |
| 148 | + } |
| 149 | + |
| 150 | + return nil |
| 151 | +} |
| 152 | + |
| 153 | +func registerDriverFile(path string) { |
| 154 | + base := filepath.Base(path) |
| 155 | + if !strings.HasPrefix(base, "lima-driver-") { |
| 156 | + return |
| 157 | + } |
| 158 | + |
| 159 | + name := strings.TrimPrefix(base, "lima-driver-") |
| 160 | + |
| 161 | + registerExternalDriver(name, path) |
| 162 | +} |
| 163 | + |
| 164 | +func isExecutable(mode os.FileMode) bool { |
| 165 | + return mode&0o111 != 0 |
| 166 | +} |
| 167 | + |
| 168 | +// func Register(driver driver.Driver) { |
| 169 | +// name := driver.Info().DriverName |
| 170 | +// if _, exists := internalDrivers[name]; exists { |
| 171 | +// return |
| 172 | +// } |
| 173 | +// internalDrivers[name] = driver |
| 174 | +// } |
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