execext package: support context command

execext/exec.go

@@ -1,6 +1,7 @@
 package execext
 
 import (
+	"context"
 	"os/exec"
 )
 
@@ -17,6 +18,6 @@ func init() {
 	ShExists = err == nil
 }
 
-func newShCommand(c string) *exec.Cmd {
+func newShCommand(ctx context.Context, c string) *exec.Cmd {
-	return exec.Command(ShPath, "-c", c)
+	return exec.CommandContext(ctx, ShPath, "-c", c)
 }

execext/exec_other.go

@@ -3,11 +3,12 @@
 package execext
 
 import (
+	"context"
 	"os/exec"
 )
 
 // NewCommand returns a new command that runs on "sh" is available or on "cmd"
 // otherwise on Windows
-func NewCommand(c string) *exec.Cmd {
+func NewCommand(ctx context.Context, c string) *exec.Cmd {
-	return newShCommand(c)
+	return newShCommand(ctx, c)
 }

execext/exec_win.go

@@ -3,18 +3,19 @@
 package execext
 
 import (
+	"context"
 	"os/exec"
 )
 
 // NewCommand returns a new command that runs on "sh" is available or on "cmd"
 // otherwise on Windows
-func NewCommand(c string) *exec.Cmd {
+func NewCommand(ctx context.Context, c string) *exec.Cmd {
 	if ShExists {
-		return newShCommand(c)
+		return newShCommand(ctx, c)
 	}
-	return newCmdCommand(c)
+	return newCmdCommand(ctx, c)
 }
 
-func newCmdCommand(c string) *exec.Cmd {
+func newCmdCommand(ctx context.Context, c string) *exec.Cmd {
-	return exec.Command("cmd", "/C", c)
+	return exec.CommandContext(ctx, "cmd", "/C", c)
 }

task.go

@@ -1,6 +1,7 @@
 package task
 
 import (
+	"context"
 	"fmt"
 	"log"
 	"os"
@@ -189,7 +190,7 @@ func (t *Task) runCommand(i int) error {
 	if err != nil {
 		return err
 	}
-	cmd := execext.NewCommand(c)
+	cmd := execext.NewCommand(context.Background(), c)
 	if dir != "" {
 		cmd.Dir = dir
 	}

variable_handling.go

@@ -2,6 +2,7 @@ package task
 
 import (
 	"bytes"
+	"context"
 	"encoding/json"
 	"errors"
 	"io/ioutil"
@@ -32,7 +33,7 @@ func handleDynamicVariableContent(value string) (string, error) {
 	if result, ok := varCmds[value]; ok {
 		return result, nil
 	}
-	cmd := execext.NewCommand(value[1:])
+	cmd := execext.NewCommand(context.Background(), value[1:])
 	cmd.Stdin = os.Stdin
 	cmd.Stderr = os.Stderr
 	b, err := cmd.Output()