terminfo_unix.go RawHistoryFolder

1//go:build linux || darwin
2
3package pty
4
5import (
6	"context"
7	"os"
8	"os/exec"
9	"strings"
10	"time"
11)
12
13const terminfoProbeTimeout = time.Second
14
15// paneEnvironment selects a terminal description on the PTY host. Resolve the
16// helper using the daemon's PATH, but look up terminfo using the child's search
17// environment and directory. Never mutate the session's environment snapshot.
18func paneEnvironment(ctx context.Context, env []string, dir string) []string {
19	if env == nil {
20		env = os.Environ()
21	}
22	term := "xterm-256color"
23	probeCtx, cancel := context.WithTimeout(ctx, terminfoProbeTimeout)
24	defer cancel()
25	cmd := exec.CommandContext(probeCtx, "infocmp", "-x", "xterm-direct")
26	cmd.Env = env
27	cmd.Dir = dir
28	cmd.WaitDelay = terminfoProbeTimeout
29	if cmd.Run() == nil {
30		term = "xterm-direct"
31	}
32
33	out := make([]string, 0, len(env)+1)
34	for _, entry := range env {
35		if !strings.HasPrefix(entry, "TERM=") {
36			out = append(out, entry)
37		}
38	}
39	return append(out, "TERM="+term)
40}