Initial QSfera import

Server/vendor/github.com/gookit/goutil/x/termenv/util.go

@@ -0,0 +1,79 @@
+package termenv
+
+import (
+	"os"
+	"os/exec"
+	"runtime"
+	"strings"
+
+	"github.com/gookit/goutil/internal/checkfn"
+	"github.com/gookit/goutil/internal/comfunc"
+	"golang.org/x/term"
+)
+
+var (
+	cmdList  = []string{"cmd", "cmd.exe"}
+	pwshList = []string{"powershell", "powershell.exe", "pwsh", "pwsh.exe"}
+)
+
+// IsTerminal 检查是否为终端设备中
+func IsTerminal() bool {
+	fd := int(os.Stdout.Fd())
+	return term.IsTerminal(fd)
+}
+
+// CurrentShell get current used shell env file.
+//
+// eg "/bin/zsh" "/bin/bash".
+// if onlyName=true, will return "zsh", "bash"
+func CurrentShell(onlyName bool, fallbackShell ...string) string {
+	return comfunc.CurrentShell(onlyName, fallbackShell...)
+}
+
+// HasShellEnv has shell env check.
+//
+// Usage:
+//
+//	HasShellEnv("sh")
+//	HasShellEnv("bash")
+func HasShellEnv(shell string) bool {
+	// can also use: "echo $0"
+	out, err := shellExec("echo OK", shell)
+	if err != nil {
+		return false
+	}
+	return strings.TrimSpace(out) == "OK"
+}
+
+// IsShellSpecialVar reports whether the character identifies a special
+// shell variable such as $*.
+func IsShellSpecialVar(c uint8) bool {
+	switch c {
+	case '*', '#', '$', '@', '!', '?', '-', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9':
+		return true
+	}
+	return false
+}
+
+func shellExec(expr, shell string) (string, error) {
+	// "-c" for bash,sh,zsh shell
+	mark := "-c"
+	if shell == "" {
+		shell = CurrentShell(true, "sh")
+	}
+
+	// special for Windows shell
+	if runtime.GOOS == "windows" {
+		// use cmd.exe, mark is "/c"
+		if checkfn.StringsContains(cmdList, shell) {
+			mark = "/c"
+		} else if checkfn.StringsContains(pwshList, shell) {
+			// "-Command" for powershell
+			mark = "-Command"
+		}
+	}
+
+	cmd := exec.Command(shell, mark, expr)
+	bs, err := cmd.CombinedOutput()
+	return string(bs), err
+}