Use golang.org/x/crypto/ssh/terminal instead of github.com/mattn/go-i…

…satty

cmd/docs.go

@@ -9,7 +9,6 @@ import (
 	"strings"
 
 	"github.com/charmbracelet/glamour"
-	"github.com/mattn/go-isatty"
 	"github.com/spf13/cobra"
 	"golang.org/x/crypto/ssh/terminal"
 )
@@ -61,7 +60,7 @@ func (c *Config) runDocsCmd(cmd *cobra.Command, args []string) error {
 	}
 
 	width := 80
-	if stdout, ok := c.Stdout().(*os.File); ok && isatty.IsTerminal(stdout.Fd()) {
+	if stdout, ok := c.Stdout().(*os.File); ok && terminal.IsTerminal(int(stdout.Fd())) {
 		width, _, err = terminal.GetSize(int(stdout.Fd()))
 		if err != nil {
 			return err

cmd/root.go

@@ -7,12 +7,12 @@ import (
 
 	"github.com/Masterminds/sprig"
 	"github.com/coreos/go-semver/semver"
-	"github.com/mattn/go-isatty"
 	"github.com/spf13/cobra"
 	"github.com/spf13/viper"
 	"github.com/twpayne/chezmoi/internal/chezmoi"
 	vfs "github.com/twpayne/go-vfs"
 	xdg "github.com/twpayne/go-xdg/v3"
+	"golang.org/x/crypto/ssh/terminal"
 )
 
 var config = Config{
@@ -140,7 +140,7 @@ func (c *Config) persistentPreRunRootE(cmd *cobra.Command, args []string) error
 		c.colored = false
 	case "auto":
 		if stdout, ok := c.Stdout().(*os.File); ok {
-			c.colored = isatty.IsTerminal(stdout.Fd())
+			c.colored = terminal.IsTerminal(int(stdout.Fd()))
 		} else {
 			c.colored = false
 		}

go.mod

@@ -21,7 +21,7 @@ require (
 	github.com/huandu/xstrings v1.2.1 // indirect
 	github.com/imdario/mergo v0.3.8 // indirect
 	github.com/logrusorgru/aurora v0.0.0-20200102142835-e9ef32dff381 // indirect
-	github.com/mattn/go-isatty v0.0.11
+	github.com/mattn/go-isatty v0.0.11 // indirect
 	github.com/mitchellh/copystructure v1.0.0 // indirect
 	github.com/mitchellh/reflectwalk v1.0.1 // indirect
 	github.com/pelletier/go-toml v1.6.0 // indirect