How to use Abort method of command Package

...292				"expected timeout error error; got %v", commitErr)293			// Assert session state is not Committed.294			clientSession := session.(XSession).ClientSession()295			assert.False(t, clientSession.TransactionCommitted(), "expected session state to not be Committed")296			// AbortTransaction without error.297			abortErr := session.AbortTransaction(context.Background())298			assert.Nil(t, abortErr, "AbortTransaction error: %v", abortErr)299			// Assert that AbortTransaction was started once and succeeded.300			assert.Equal(t, 1, len(abortStarted), "expected 1 abortTransaction started event, got %d", len(abortStarted))301			assert.Equal(t, 1, len(abortSucceeded), "expected 1 abortTransaction succeeded event, got %d",302				len(abortSucceeded))303			assert.Equal(t, 0, len(abortFailed), "expected 0 abortTransaction failed events, got %d", len(abortFailed))304			return nil305		})306	})307	t.Run("commitTransaction timeout does not retry", func(t *testing.T) {308		withTransactionTimeout = 2 * time.Second309		coll := db.Collection("test")310		// Explicitly create the collection on server because implicit collection creation is not allowed in311		// transactions for server versions <= 4.2.312		err := db.RunCommand(bgCtx, bson.D{{"create", coll.Name()}}).Err()313		assert.Nil(t, err, "error creating collection on server: %v", err)...

...11	"github.com/juju/juju/cmd/modelcmd"12	"github.com/juju/juju/core/model"13)14const (15	abortSummary = "Aborts a branch in the model."16	abortDoc     = `17Aborting a branch aborts changes made to that branch.  A branch18can only be aborted if no units are tracked by that branch.19Examples:20    juju abort upgrade-postgresql21See also:22    track23    branch24    commit25    add-branch26    diff27`28)29// NewAbortCommand wraps abortCommand with sane model settings.30func NewAbortCommand() cmd.Command {31	return modelcmd.Wrap(&abortCommand{})32}33// abortCommand supplies the "add-branch" CLI command used to add a new branch to34// the current model.35type abortCommand struct {36	modelcmd.ModelCommandBase37	api AbortCommandAPI38	branchName string39}40// AbortCommandAPI describes API methods required41// to execute the branch command.42//go:generate go run github.com/golang/mock/mockgen -package mocks -destination ./mocks/abort_mock.go github.com/juju/juju/cmd/juju/model AbortCommandAPI43type AbortCommandAPI interface {44	Close() error45	// Abort aborts an existing branch to the model.46	AbortBranch(branchName string) error47	// HasActiveBranch returns true if the model has an48	// "in-flight" branch with the input name.49	HasActiveBranch(branchName string) (bool, error)50}51// Info implements part of the cmd.Command interface.52func (c *abortCommand) Info() *cmd.Info {53	info := &cmd.Info{54		Name:    "abort",55		Args:    "<branch name>",56		Purpose: abortSummary,57		Doc:     abortDoc,58	}59	return jujucmd.Info(info)60}61// SetFlags implements part of the cmd.Command interface.62func (c *abortCommand) SetFlags(f *gnuflag.FlagSet) {63	c.ModelCommandBase.SetFlags(f)64}65// Init implements part of the cmd.Command interface.66func (c *abortCommand) Init(args []string) error {67	if len(args) != 1 {68		return errors.Errorf("expected a branch name")69	}70	if err := model.ValidateBranchName(args[0]); err != nil {71		return err72	}73	c.branchName = args[0]74	return nil75}76// getAPI returns the API that supplies methods77// required to execute this command.78func (c *abortCommand) getAPI() (AbortCommandAPI, error) {79	if c.api != nil {80		return c.api, nil81	}82	api, err := c.NewAPIRoot()83	if err != nil {84		return nil, errors.Annotate(err, "opening API connection")85	}86	client := modelgeneration.NewClient(api)87	return client, nil88}89// Run implements the meaty part of the cmd.Command interface.90func (c *abortCommand) Run(ctx *cmd.Context) error {91	client, err := c.getAPI()92	if err != nil {93		return err94	}95	defer func() { _ = client.Close() }()96	hasBranch, err := client.HasActiveBranch(c.branchName)97	if err != nil {98		return err99	}100	if !hasBranch {101		return errors.Errorf("this model has no active branch %q", c.branchName)102	}103	if err = client.AbortBranch(c.branchName); err != nil {104		return err105	}106	// Update the model store with the master branch for this model.107	if err = c.SetActiveBranch(model.GenerationMaster); err != nil {108		return err109	}110	msg := fmt.Sprintf("Aborting all changes in %q and closing branch.\n", c.branchName)111	msg = msg + fmt.Sprintf("Active branch set to %q\n", model.GenerationMaster)112	_, err = ctx.Stdout.Write([]byte(msg))113	return err114}...

1import (2func main() {3    cmd := exec.Command("ping", "google.com")4    err := cmd.Start()5    if err != nil {6        fmt.Println(err)7    }8    fmt.Println("Process id is", cmd.Process.Pid)9    cmd.Process.Kill()10    err = cmd.Wait()11    fmt.Println("Process status is", err)12}13import (14func main() {15    cmd1 := exec.Command("ls", "-lrt")16    cmd2 := exec.Command("wc", "-l")17    r, w := io.Pipe()18    cmd1.Start()19    cmd2.Start()20    cmd1.Wait()21    w.Close()22    cmd2.Wait()23}

1import (2func main() {3    cmd := exec.Command("sleep", "10")4    err := cmd.Start()5    if err != nil {6        fmt.Println(err)7    }8    fmt.Println("sleeping...")9    cmd.Process.Signal(os.Interrupt)10    err = cmd.Wait()11    fmt.Println("done.")12}

1import (  2func main() {  3    cmd := exec.Command("ls", "-la")4    err := cmd.Start()5    if err != nil {6        fmt.Println(err)7    }8    err = cmd.Abort()9    if err != nil {10        fmt.Println(err)11    }12    err = cmd.Wait()13    fmt.Println(err)14}

1import (2func main() {3	cmd := exec.Command("sleep", "5")4	err := cmd.Start()5	if err != nil {6		fmt.Println("Error: ", err)7	}8	err = cmd.Process.Kill()9	if err != nil {10		fmt.Println("Error: ", err)11	}12	fmt.Println("Process killed")13}14Related posts: GoLang | exec.CommandContext() method GoLang | exec.Command() method GoLang | exec.LookPath() method GoLang | exec.LookPath() method GoLang | exec.Command() method

1import (2func main() {3    cmd := exec.Command("sleep", "10")4    err := cmd.Start()5    if err != nil {6        fmt.Println("Error: ", err)7    }8    err = cmd.Abort()9    if err != nil {10        fmt.Println("Error: ", err)11    }12    fmt.Println("Process aborted")13}

1import (2func main() {3    cmd := exec.Command("ping", "-c", "4", "google.com")4    err := cmd.Start()5    if err != nil {6        fmt.Println("Error: ", err)7    }8    time.Sleep(2 * time.Second)9    err = cmd.Process.Kill()10    if err != nil {11        fmt.Println("Error: ", err)12    }13    fmt.Println("Process killed")14}15ProcessState contains information about the process. It can be accessed by the ProcessState() method of the Cmd type. The following code shows how to use the ProcessState() method:16import (17func main() {18    cmd := exec.Command("ping", "-c", "4", "google.com")19    err := cmd.Run()20    if err != nil {21        fmt.Println("Error: ", err)22    }23    fmt.Println("Process State: ", cmd.ProcessState)24}25Process State:  &{exit 0 0}26Wait()27The following code shows how to use the Wait() method:28import (29func main() {30    cmd := exec.Command("ping", "-c", "4", "google.com")31    err := cmd.Run()32    if err != nil {33        fmt.Println("Error: ", err)34    }35    fmt.Println("Process State: ", cmd.ProcessState)36    err = cmd.Wait()37    if err != nil {38        fmt.Println("Error: ", err)39    }40    fmt.Println("Process State: ", cmd.ProcessState)41}42Process State:  &{exit 0 0}43Process State:  &{exit 0

1import "fmt"2import "os/exec"3func main() {4    cmd := exec.Command("sleep", "5")5    err := cmd.Start()6    if err != nil {7        fmt.Println("Error starting process: ", err)8    }9    err = cmd.Process.Kill()10    if err != nil {11        fmt.Println("Error killing process: ", err)12    }13    err = cmd.Wait()14    fmt.Println("Process finished with error: ", err)15}16import "fmt"17import "os/exec"18func main() {19    cmd := exec.Command("sleep", "5")20    err := cmd.Start()21    if err != nil {22        fmt.Println("Error starting process: ", err)23    }24    err = cmd.Process.Kill()25    if err != nil {26        fmt.Println("Error killing process: ", err)27    }28    err = cmd.Wait()29    fmt.Println("Process finished with error: ", err)30}31import "fmt"32import "os/exec"33func main() {34    cmd := exec.Command("sleep", "5")35    err := cmd.Run()36    fmt.Println("Process finished with error: ", err)37}38import "fmt"39import "os/exec"40func main() {41    cmd := exec.Command("sleep", "5")42    out, err := cmd.Output()43    fmt.Println("Process finished with error: ", err)44    fmt.Println("Process finished with output: ", out)45}46import "fmt"47import "os/exec"48func main() {49    cmd := exec.Command("sleep", "5")

1import (2func main() {3	cmd := exec.Command("sleep", "1000")4	cmd.Start()5	time.Sleep(time.Second)6	err := cmd.Process.Kill()7	if err != nil {8		fmt.Println("Error: ", err)9	}10	fmt.Println("Process killed")11}12import (13func main() {14	cmd := exec.Command("sleep", "1000")15	cmd.Start()16	time.Sleep(time.Second)17	err := cmd.Process.Kill()18	if err != nil {19		fmt.Println("Error: ", err)20	}21	fmt.Println("Process killed")22}23Golang | Command.Wait() method24Golang | Command.Output() method25Golang | Command.Run() method26Golang | Command.Start() method27Golang | Command.CombinedOutput() method28Golang | Command.StdinPipe() method29Golang | Command.StdoutPipe() method30Golang | Command.StderrPipe() method31Golang | Command.SetDir() method32Golang | Command.SetEnv() method33Golang | Command.SetStderr() method34Golang | Command.SetStdin() method35Golang | Command.SetStdout() method36Golang | Command.Dir() method37Golang | Command.Env() method38Golang | Command.Process() method39Golang | Command.ProcessState() method40Golang | Command.Stdin() method41Golang | Command.Stdout() method42Golang | Command.Stderr() method43Golang | Command.Wait() method44Golang | Command.Output() method45Golang | Command.Run() method46Golang | Command.Start() method47Golang | Command.CombinedOutput() method48Golang | Command.StdinPipe() method49Golang | Command.StdoutPipe() method50Golang | Command.StderrPipe() method51Golang | Command.SetDir() method

1import (2func main() {3 cmd := exec.Command("sleep", "10")4 err := cmd.Start()5 if err != nil {6 fmt.Println("Error starting command:", err)7 }8 time.Sleep(2 * time.Second)9 err = cmd.Process.Kill()10 if err != nil {11 fmt.Println("Error aborting command:", err)12 }13 fmt.Println("Command aborted")14}