Change not to use cat command

pkg/commands/files.go

@@ -2,6 +2,7 @@ package commands
 
 import (
 	"fmt"
+	"io/ioutil"
 	"os"
 	"path/filepath"
 	"strconv"
@@ -15,7 +16,11 @@ import (
 
 // CatFile obtains the content of a file
 func (c *GitCommand) CatFile(fileName string) (string, error) {
-	return c.OSCommand.CatFile(fileName)
+	buf, err := ioutil.ReadFile(fileName)
+	if err != nil {
+		return "", nil
+	}
+	return string(buf), nil
 }
 
 func (c *GitCommand) OpenMergeToolCmd() string {

pkg/commands/files_test.go

@@ -4,7 +4,6 @@ import (
 	"fmt"
 	"io/ioutil"
 	"os/exec"
-	"runtime"
 	"testing"
 
 	"github.com/jesseduffield/lazygit/pkg/commands/models"
@@ -13,28 +12,6 @@ import (
 	"github.com/stretchr/testify/assert"
 )
 
-// TestGitCommandCatFile tests emitting a file using commands, where commands vary by OS.
-func TestGitCommandCatFile(t *testing.T) {
-	var osCmd string
-	switch os := runtime.GOOS; os {
-	case "windows":
-		osCmd = "type"
-	default:
-		osCmd = "cat"
-	}
-	gitCmd := NewDummyGitCommand()
-	gitCmd.OSCommand.Command = func(cmd string, args ...string) *exec.Cmd {
-		assert.EqualValues(t, osCmd, cmd)
-		assert.EqualValues(t, []string{"test.txt"}, args)
-
-		return secureexec.Command("echo", "-n", "test")
-	}
-
-	o, err := gitCmd.CatFile("test.txt")
-	assert.NoError(t, err)
-	assert.Equal(t, "test", o)
-}
-
 // TestGitCommandStageFile is a function.
 func TestGitCommandStageFile(t *testing.T) {
 	gitCmd := NewDummyGitCommand()

pkg/commands/oscommands/os.go

@@ -24,7 +24,6 @@ import (
 // Platform stores the os state
 type Platform struct {
 	OS              string
-	CatCmd          []string
 	Shell           string
 	ShellArg        string
 	EscapedQuote    string
@@ -217,18 +216,6 @@ func (c *OSCommand) RunCommandWithOutputLive(command string, output func(string)
 	return RunCommandWithOutputLiveWrapper(c, command, output)
 }
 
-func (c *OSCommand) CatFile(filename string) (string, error) {
-	arr := append(c.Platform.CatCmd, filename)
-	cmdStr := strings.Join(arr, " ")
-	c.Log.WithField("command", cmdStr).Info("Cat")
-	cmd := c.Command(arr[0], arr[1:]...)
-	output, err := sanitisedCommandOutput(cmd.CombinedOutput())
-	if err != nil {
-		c.Log.WithField("command", cmdStr).Error(output)
-	}
-	return output, err
-}
-
 // DetectUnamePass detect a username / password / passphrase question in a command
 // promptUserForCredential is a function that gets executed when this function detect you need to fillin a password or passphrase
 // The promptUserForCredential argument will be "username", "password" or "passphrase" and expects the user's password/passphrase or username back

pkg/commands/oscommands/os_default_platform.go

@@ -9,7 +9,6 @@ import (
 func getPlatform() *Platform {
 	return &Platform{
 		OS:              runtime.GOOS,
-		CatCmd:          []string{"cat"},
 		Shell:           "bash",
 		ShellArg:        "-c",
 		EscapedQuote:    `"`,

pkg/commands/oscommands/os_windows.go

@@ -3,7 +3,6 @@ package oscommands
 func getPlatform() *Platform {
 	return &Platform{
 		OS:           "windows",
-		CatCmd:       []string{"cmd", "/c", "type"},
 		Shell:        "cmd",
 		ShellArg:     "/c",
 		EscapedQuote: `\"`,