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package commands
import (
"errors"
"os"
"os/exec"
"strings"
"github.com/davecgh/go-spew/spew"
"github.com/mgutz/str"
"github.com/sirupsen/logrus"
gitconfig "github.com/tcnksm/go-gitconfig"
)
// Platform stores the os state
type Platform struct {
os string
shell string
shellArg string
escapedQuote string
}
// OSCommand holds all the os commands
type OSCommand struct {
Log *logrus.Entry
Platform *Platform
command func(string, ...string) *exec.Cmd
getGlobalGitConfig func(string) (string, error)
getenv func(string) string
}
// NewOSCommand os command runner
func NewOSCommand(log *logrus.Entry) *OSCommand {
return &OSCommand{
Log: log,
Platform: getPlatform(),
command: exec.Command,
getGlobalGitConfig: gitconfig.Global,
getenv: os.Getenv,
}
}
// RunCommandWithOutput wrapper around commands returning their output and error
func (c *OSCommand) RunCommandWithOutput(command string) (string, error) {
c.Log.WithField("command", command).Info("RunCommand")
splitCmd := str.ToArgv(command)
c.Log.Info(splitCmd)
return sanitisedCommandOutput(
c.command(splitCmd[0], splitCmd[1:]...).CombinedOutput(),
)
}
// RunCommand runs a command and just returns the error
func (c *OSCommand) RunCommand(command string) error {
_, err := c.RunCommandWithOutput(command)
return err
}
// FileType tells us if the file is a file, directory or other
func (c *OSCommand) FileType(path string) string {
fileInfo, err := os.Stat(path)
if err != nil {
return "other"
}
if fileInfo.IsDir() {
return "directory"
}
return "file"
}
// RunDirectCommand wrapper around direct commands
func (c *OSCommand) RunDirectCommand(command string) (string, error) {
c.Log.WithField("command", command).Info("RunDirectCommand")
args := str.ToArgv(c.Platform.shellArg + " " + command)
c.Log.Info(spew.Sdump(args))
return sanitisedCommandOutput(
exec.
Command(c.Platform.shell, args...).
CombinedOutput(),
)
}
func sanitisedCommandOutput(output []byte, err error) (string, error) {
outputString := string(output)
if err != nil {
// errors like 'exit status 1' are not very useful so we'll create an error
// from the combined output
return outputString, errors.New(outputString)
}
return outputString, nil
}
// getOpenCommand get open command
func (c *OSCommand) getOpenCommand() (string, string, error) {
//NextStep open equivalents: xdg-open (linux), cygstart (cygwin), open (OSX)
trailMap := map[string]string{
"xdg-open": " &>/dev/null &",
"cygstart": "",
"open": "",
}
for name, trail := range trailMap {
if err := c.RunCommand("which " + name); err == nil {
return name, trail, nil
}
}
return "", "", errors.New("Unsure what command to use to open this file")
}
// VsCodeOpenFile opens the file in code, with the -r flag to open in the
// current window
// each of these open files needs to have the same function signature because
// they're being passed as arguments into another function,
// but only editFile actually returns a *exec.Cmd
func (c *OSCommand) VsCodeOpenFile(filename string) (*exec.Cmd, error) {
return nil, c.RunCommand("code -r " + filename)
}
// SublimeOpenFile opens the filein sublime
// may be deprecated in the future
func (c *OSCommand) SublimeOpenFile(filename string) (*exec.Cmd, error) {
return nil, c.RunCommand("subl " + filename)
}
// OpenFile opens a file with the given
func (c *OSCommand) OpenFile(filename string) error {
cmdName, cmdTrail, err := c.getOpenCommand()
if err != nil {
return err
}
return c.RunCommand(cmdName + " " + c.Quote(filename) + cmdTrail) // TODO: test on linux
}
// EditFile opens a file in a subprocess using whatever editor is available,
// falling back to core.editor, VISUAL, EDITOR, then vi
func (c *OSCommand) EditFile(filename string) (*exec.Cmd, error) {
editor, _ := c.getGlobalGitConfig("core.editor")
if editor == "" {
editor = c.getenv("VISUAL")
}
if editor == "" {
editor = c.getenv("EDITOR")
}
if editor == "" {
if err := c.RunCommand("which vi"); err == nil {
editor = "vi"
}
}
if editor == "" {
return nil, errors.New("No editor defined in $VISUAL, $EDITOR, or git config")
}
return c.PrepareSubProcess(editor, filename), nil
}
// PrepareSubProcess iniPrepareSubProcessrocess then tells the Gui to switch to it
func (c *OSCommand) PrepareSubProcess(cmdName string, commandArgs ...string) *exec.Cmd {
return c.command(cmdName, commandArgs...)
}
// Quote wraps a message in platform-specific quotation marks
func (c *OSCommand) Quote(message string) string {
message = strings.Replace(message, "`", "\\`", -1)
return c.Platform.escapedQuote + message + c.Platform.escapedQuote
}
// Unquote removes wrapping quotations marks if they are present
// this is needed for removing quotes from staged filenames with spaces
func (c *OSCommand) Unquote(message string) string {
return strings.Replace(message, `"`, "", -1)
}
// AppendLineToFile adds a new line in file
func (c *OSCommand) AppendLineToFile(filename, line string) error {
f, err := os.OpenFile(filename, os.O_APPEND|os.O_WRONLY|os.O_CREATE, 0600)
if err != nil {
return err
}
defer f.Close()
_, err = f.WriteString("\n" + line)
return err
}
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