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// License: GPLv3 Copyright: 2023, Kovid Goyal, <kovid at kovidgoyal.net>
package run_shell
import (
"fmt"
"github.com/kovidgoyal/kitty"
"os"
"path/filepath"
"strings"
"github.com/kovidgoyal/kitty/tools/cli"
"github.com/kovidgoyal/kitty/tools/tty"
"github.com/kovidgoyal/kitty/tools/tui"
"github.com/kovidgoyal/kitty/tools/tui/shell_integration"
"github.com/kovidgoyal/kitty/tools/utils"
"golang.org/x/exp/slices"
"golang.org/x/sys/unix"
)
var _ = fmt.Print
type Options struct {
Shell string
ShellIntegration string
Env []string
Cwd string
InjectSelfOntoPath string
}
func inject_self_onto_path() {
if exe, err := os.Executable(); err == nil {
if exe_dir, err := filepath.Abs(exe); err == nil {
realpath := func(x string) string {
if ans, err := filepath.EvalSymlinks(x); err == nil {
return ans
}
return x
}
exe_dir = realpath(filepath.Dir(exe_dir))
path_items := strings.Split(os.Getenv("PATH"), string(os.PathListSeparator))
realpath_items := utils.Map(realpath, path_items)
done := false
changed := false
is_executable_file := func(q string) bool {
if unix.Access(q, unix.X_OK) != nil {
return false
}
if s, err := os.Stat(q); err == nil && !s.IsDir() {
return true
}
return false
}
for i, x := range realpath_items {
q := filepath.Join(x, filepath.Base(exe))
if is_executable_file(q) {
// some kitten already in path
if utils.Samefile(q, exe) {
done = true
break
}
path_items = slices.Insert(path_items, i, exe_dir)
changed, done = true, true
break
}
}
if !done {
path_items = append(path_items, exe_dir)
changed = true
}
if changed {
os.Setenv("PATH", strings.Join(path_items, string(os.PathListSeparator)))
}
}
}
}
func main(args []string, opts *Options) (rc int, err error) {
if len(args) > 0 {
tui.RunCommandRestoringTerminalToSaneStateAfter(args)
}
env_before := os.Environ()
changed := false
for _, entry := range opts.Env {
k, v, found := strings.Cut(entry, "=")
if found {
if err := os.Setenv(k, v); err != nil {
return 1, fmt.Errorf("Failed to set the env var %s with error: %w", k, err)
}
} else {
if err := os.Unsetenv(k); err != nil {
return 1, fmt.Errorf("Failed to unset the env var %s with error: %w", k, err)
}
}
changed = true
}
if os.Getenv("TERM") == "" {
os.Setenv("TERM", kitty.DefaultTermName)
}
if opts.InjectSelfOntoPath == "always" || (opts.InjectSelfOntoPath == "unless-root" && os.Geteuid() != 0) {
inject_self_onto_path()
}
if term := os.Getenv("TERM"); term == kitty.DefaultTermName && shell_integration.PathToTerminfoDb(term) == "" {
if terminfo_dir, err := shell_integration.EnsureTerminfoFiles(); err == nil {
os.Unsetenv("TERMINFO")
existing := os.Getenv("TERMINFO_DIRS")
if existing != "" {
existing = string(os.PathListSeparator) + existing
}
os.Setenv("TERMINFO_DIRS", terminfo_dir+existing)
}
}
err = tui.RunShell(tui.ResolveShell(opts.Shell), tui.ResolveShellIntegration(opts.ShellIntegration), opts.Cwd)
if changed {
os.Clearenv()
for _, entry := range env_before {
k, v, _ := strings.Cut(entry, "=")
os.Setenv(k, v)
}
}
if err != nil {
rc = 1
}
return
}
var debugprintln = tty.DebugPrintln
var _ = debugprintln
func EntryPoint(root *cli.Command) *cli.Command {
sc := root.AddSubCommand(&cli.Command{
Name: "run-shell",
Usage: "[options] [optional cmd to run before running the shell ...]",
ShortDescription: "Run the user's shell with shell integration enabled",
HelpText: "Run the users's configured shell. If the shell supports shell integration, enable it based on the user's configured shell_integration setting.",
Run: func(cmd *cli.Command, args []string) (ret int, err error) {
opts := &Options{}
err = cmd.GetOptionValues(opts)
if err != nil {
return 1, err
}
return main(args, opts)
},
})
sc.Add(cli.OptionSpec{
Name: "--shell-integration",
Help: "Specify a value for the :opt:`shell_integration` option, overriding the one from :file:`kitty.conf`.",
})
sc.Add(cli.OptionSpec{
Name: "--shell",
Default: ".",
Help: "Specify the shell command to run. The default value of :code:`.` will use the parent shell if recognized, falling back to the value of the :opt:`shell` option from :file:`kitty.conf`.",
})
sc.Add(cli.OptionSpec{
Name: "--env",
Help: "Specify an env var to set before running the shell. Of the form KEY=VAL. Can be specified multiple times. If no = is present KEY is unset.",
Type: "list",
})
sc.Add(cli.OptionSpec{
Name: "--cwd",
Help: "The working directory to use when executing the shell.",
})
sc.Add(cli.OptionSpec{
Name: "--inject-self-onto-path",
Help: "Add the directory containing this kitten binary to PATH. Directory is added only if not already present.",
Default: "always",
Choices: "always,never,unless-root",
})
return sc
}
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