Debug flag

.vscode/launch.json

@@ -0,0 +1,40 @@
+{
+    // Use IntelliSense to learn about possible attributes.
+    // Hover to view descriptions of existing attributes.
+    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "name": "Launch cmd",
+            "type": "go",
+            "request": "launch",
+            "mode": "auto",
+            "program": "cmd/docker-machine/machine.go",
+            "args": [
+                "env", "--shell", "powershell"
+                // "regenerate-certs", "--force"
+            ],
+            "env": {
+                "MACHINE_PLUGIN_REATTACH": "127.0.0.1:55704",
+                "MACHINE_DEBUG": "1",
+                "MACHINE_NOHEART": "1",
+                "GODEBUG": "execerrdot=0"
+            },
+            "cwd": "${workspaceFolder}"
+        },
+        {
+            "name": "Launch plugin",
+            "type": "go",
+            "request": "launch",
+            "mode": "auto",
+            "program": "drivers/docker-machine-driver-vmware/main.go",
+            "args": [
+            ],
+            "env": {
+                "MACHINE_DEBUG": "1",
+                "MACHINE_PLUGIN_TOKEN": "42",
+                "MACHINE_NOHEART": "1",
+            }
+        }
+    ]
+}

go.mod

@@ -1,48 +1,56 @@
 module github.com/docker/machine
 
-go 1.13
+go 1.20
 
 require (
 	github.com/Azure/azure-sdk-for-go v5.0.0-beta+incompatible
 	github.com/Azure/go-autorest v7.2.1+incompatible
-	github.com/Nvveen/Gotty v0.0.0-20120604004816-cd527374f1e5 // indirect
 	github.com/aws/aws-sdk-go v1.4.10
-	github.com/bitly/go-simplejson v0.5.0 // indirect
-	github.com/bmizerany/assert v0.0.0-20160611221934-b7ed37b82869 // indirect
 	github.com/bugsnag/bugsnag-go v0.0.0-20151120182711-02e952891c52
-	github.com/bugsnag/osext v0.0.0-20130617224835-0dd3f918b21b // indirect
-	github.com/bugsnag/panicwrap v0.0.0-20160118154447-aceac81c6e2f // indirect
-	github.com/cenkalti/backoff v0.0.0-20141124221459-9831e1e25c87 // indirect
 	github.com/codegangsta/cli v0.0.0-20151120215642-0302d3914d2a
-	github.com/dgrijalva/jwt-go v0.0.0-20160831183534-24c63f56522a // indirect
 	github.com/digitalocean/godo v0.0.0-20170317202744-d59ed2fe842b
-	github.com/docker/docker v0.0.0-20180621001606-093424bec097 // indirect
-	github.com/docker/go-units v0.0.0-20151230175859-0bbddae09c5a // indirect
 	github.com/exoscale/egoscale v0.9.23
-	github.com/go-ini/ini v0.0.0-20151124192405-03e0e7d51a13 // indirect
-	github.com/golang/protobuf v0.0.0-20160221214941-3c84672111d9 // indirect
-	github.com/google/go-querystring v0.0.0-20140804062624-30f7a39f4a21 // indirect
-	github.com/gorilla/mux v1.8.0 // indirect
 	github.com/hectane/go-acl v0.0.0-20190604041725-da78bae5fc95
 	github.com/intel-go/cpuid v0.0.0-20181003105527-1a4a6f06a1c6
-	github.com/jinzhu/copier v0.0.0-20180308034124-7e38e58719c3 // indirect
-	github.com/jmespath/go-jmespath v0.0.0-20151117175822-3433f3ea46d9 // indirect
-	github.com/juju/loggo v1.0.0 // indirect
-	github.com/mitchellh/mapstructure v0.0.0-20140721150620-740c764bc614 // indirect
 	github.com/moby/term v0.0.0-20200416134343-063f2cd0b49d
 	github.com/rackspace/gophercloud v0.0.0-20150408191457-ce0f487f6747
 	github.com/samalba/dockerclient v0.0.0-20151231000007-f661dd4754aa
 	github.com/skarademir/naturalsort v0.0.0-20150715044055-69a5d87bef62
-	github.com/smartystreets/goconvey v1.7.2 // indirect
 	github.com/stretchr/testify v1.2.2
-	github.com/tent/http-link-go v0.0.0-20130702225549-ac974c61c2f9 // indirect
 	github.com/vmware/govcloudair v0.0.2
 	github.com/vmware/govmomi v0.6.2
 	golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2
 	golang.org/x/net v0.0.0-20190311183353-d8887717615a
 	golang.org/x/oauth2 v0.0.0-20151117210313-442624c9ec92
 	golang.org/x/sys v0.0.0-20200302150141-5c8b2ff67527
 	google.golang.org/api v0.0.0-20180213000552-87a2f5c77b36
+)
+
+require (
+	github.com/Azure/go-ansiterm v0.0.0-20170929234023-d6e3b3328b78 // indirect
+	github.com/Nvveen/Gotty v0.0.0-20120604004816-cd527374f1e5 // indirect
+	github.com/bitly/go-simplejson v0.5.0 // indirect
+	github.com/bugsnag/osext v0.0.0-20130617224835-0dd3f918b21b // indirect
+	github.com/bugsnag/panicwrap v0.0.0-20160118154447-aceac81c6e2f // indirect
+	github.com/cenkalti/backoff v0.0.0-20141124221459-9831e1e25c87 // indirect
+	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/dgrijalva/jwt-go v0.0.0-20160831183534-24c63f56522a // indirect
+	github.com/docker/docker v0.0.0-20180621001606-093424bec097 // indirect
+	github.com/docker/go-units v0.0.0-20151230175859-0bbddae09c5a // indirect
+	github.com/go-ini/ini v0.0.0-20151124192405-03e0e7d51a13 // indirect
+	github.com/golang/protobuf v0.0.0-20160221214941-3c84672111d9 // indirect
+	github.com/google/go-querystring v0.0.0-20140804062624-30f7a39f4a21 // indirect
+	github.com/gorilla/mux v1.8.0 // indirect
+	github.com/jinzhu/copier v0.0.0-20180308034124-7e38e58719c3 // indirect
+	github.com/jmespath/go-jmespath v0.0.0-20151117175822-3433f3ea46d9 // indirect
+	github.com/juju/loggo v1.0.0 // indirect
+	github.com/konsorten/go-windows-terminal-sequences v1.0.1 // indirect
+	github.com/mitchellh/mapstructure v0.0.0-20140721150620-740c764bc614 // indirect
+	github.com/pmezard/go-difflib v1.0.0 // indirect
+	github.com/sirupsen/logrus v1.4.2 // indirect
+	github.com/smartystreets/goconvey v1.7.2 // indirect
+	github.com/stretchr/objx v0.1.1 // indirect
+	github.com/tent/http-link-go v0.0.0-20130702225549-ac974c61c2f9 // indirect
 	google.golang.org/appengine v0.0.0-20160205025855-6a436539be38 // indirect
 	google.golang.org/cloud v0.0.0-20151119220103-975617b05ea8 // indirect
 	gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c // indirect

go.sum

@@ -10,8 +10,6 @@ github.com/aws/aws-sdk-go v1.4.10 h1:edjsaZGVeOBOS5HBzvag8lfLZMFlQMNC+yCvM5roBro
 github.com/aws/aws-sdk-go v1.4.10/go.mod h1:ZRmQr0FajVIyZ4ZzBYKG5P3ZqPz9IHG41ZoMu1ADI3k=
 github.com/bitly/go-simplejson v0.5.0 h1:6IH+V8/tVMab511d5bn4M7EwGXZf9Hj6i2xSwkNEM+Y=
 github.com/bitly/go-simplejson v0.5.0/go.mod h1:cXHtHw4XUPsvGaxgjIAn8PhEWG9NfngEKAMDJEczWVA=
-github.com/bmizerany/assert v0.0.0-20160611221934-b7ed37b82869 h1:DDGfHa7BWjL4YnC6+E63dPcxHo2sUxDIu8g3QgEJdRY=
-github.com/bmizerany/assert v0.0.0-20160611221934-b7ed37b82869/go.mod h1:Ekp36dRnpXw/yCqJaO+ZrUyxD+3VXMFFr56k5XYrpB4=
 github.com/bugsnag/bugsnag-go v0.0.0-20151120182711-02e952891c52 h1:p8KmEtec4AQdLNtpfFlTMQCmO2ynjlPf93rUEuFqhkU=
 github.com/bugsnag/bugsnag-go v0.0.0-20151120182711-02e952891c52/go.mod h1:2oa8nejYd4cQ/b0hMIopN0lCRxU0bueqREvZLWFrtK8=
 github.com/bugsnag/osext v0.0.0-20130617224835-0dd3f918b21b h1:otBG+dV+YK+Soembjv71DPz3uX/V/6MMlSyD9JBQ6kQ=

libmachine/drivers/plugin/localbinary/plugin.go

@@ -29,6 +29,7 @@ const (
 	PluginEnvKey        = "MACHINE_PLUGIN_TOKEN"
 	PluginEnvVal        = "42"
 	PluginEnvDriverName = "MACHINE_PLUGIN_DRIVER_NAME"
+	PluginEnvReattach   = "MACHINE_PLUGIN_REATTACH"
 )
 
 type PluginStreamer interface {
@@ -112,6 +113,16 @@ func driverPath(driverName string) string {
 }
 
 func NewPlugin(driverName string) (*Plugin, error) {
+	reattachAddr := os.Getenv(PluginEnvReattach)
+	if (reattachAddr != "") {
+		addrCh := make(chan string, 1)
+		addrCh <- reattachAddr
+		return &Plugin{
+			stopCh: make(chan struct{}),
+			addrCh: addrCh,
+		},  nil
+	}
+
 	driverPath := driverPath(driverName)
 	binaryPath, err := exec.LookPath(driverPath)
 	if err != nil {
@@ -189,6 +200,10 @@ func (lbp *Plugin) AttachStream(scanner *bufio.Scanner) <-chan string {
 }
 
 func (lbp *Plugin) execServer() error {
+	if (lbp.Executor == nil) {
+		return nil
+	}
+
 	outScanner, errScanner, err := lbp.Executor.Start()
 	if err != nil {
 		return err

libmachine/drivers/plugin/register_driver.go

@@ -28,6 +28,7 @@ Please use this plugin through the main 'docker-machine' binary.
 `, version.APIVersion)
 		os.Exit(1)
 	}
+	noheartEnv := os.Getenv("MACHINE_NOHEART")
 
 	log.SetDebug(true)
 	os.Setenv("MACHINE_DEBUG", "1")
@@ -57,7 +58,9 @@ Please use this plugin through the main 'docker-machine' binary.
 			continue
 		case <-time.After(heartbeatTimeout):
 			// TODO: Add heartbeat retry logic
-			os.Exit(1)
+			if noheartEnv == "" {
+				os.Exit(1)
+			}
 		}
 	}
 }