larksuite/cli · error

cannot locate binary

Error message

cannot locate binary: %w

What it means

VerifyBinary locates the freshly installed `lark-cli` to run `lark-cli --version`. It first tries execLookPath("lark-cli") and, failing that, falls back to vfs.Executable() (the running process's own binary). This error is returned when both resolution paths fail, meaning the binary's version cannot be verified.

Solutions

1. Add the npm/pnpm global bin directory to PATH so `lark-cli` resolves (`which lark-cli` to confirm)
2. Complete the update manually: `npm install -g @larksuite/cli@latest` or `pnpm add -g @larksuite/cli@latest`, then run `lark-cli --version`
3. If the current binary was moved/deleted, restart from a known-good copy and retry the update
4. Check the environment (container permissions, /proc availability) if vfs.Executable fails unexpectedly

Example fix

// before
export PATH=/usr/local/bin:$PATH   # lark-cli installed to ~/.local/share/pnpm
// after
export PATH=$HOME/.local/share/pnpm:/usr/local/bin:$PATH
lark-cli --version   # now resolvable

if _, err := exec.LookPath("lark-cli"); err != nil { /* add the install bin dir to PATH before verifying */ }

func binaryResolvable() bool { _, err := exec.LookPath("lark-cli"); return err == nil }

if err := updater.VerifyBinary(expectedVersion); err != nil {
	if strings.Contains(err.Error(), "cannot locate binary") {
		// fall back to manual `lark-cli --version` after fixing PATH
	} else {
		return err
	}
}

When it happens

Trigger: Calling Updater.VerifyBinary (e.g. from doAutoUpdate after an update) when `lark-cli` is not on PATH AND the running executable's path cannot be determined (vfs.Executable returns an error).

Common situations: Update installed the binary into a directory not on PATH (npm/pnpm global bin dir missing from PATH); the running binary was deleted/moved mid-update so Executable fails; restricted container environments where /proc self-exe resolution fails.

Related errors

• binary verification timed out after
• binary not executable
• npm not found in PATH
• pnpm not found in PATH
• cannot rename binary for update

AI-assisted analysis of larksuite/cli@7fd6ef3c07 (2026-09-04). Data as JSON: /api/errors/ae90ebfca05c26ff. Report an issue: GitHub.

Appendix: source

Thrown at internal/selfupdate/updater.go:442

}

// VerifyBinary checks that the installed binary reports the expected version
// by running "lark-cli --version" and comparing the version token exactly.
// Output format is "lark-cli version X.Y.Z"; the last field is extracted and
// compared against expectedVersion (both stripped of any "v" prefix).
func (u *Updater) VerifyBinary(expectedVersion string) error {
	if u.VerifyOverride != nil {
		return u.VerifyOverride(expectedVersion)
	}
	// Prefer PATH resolution so npm global bin symlinks pick up the newly
	// installed binary (#836). If `lark-cli` is not on PATH (e.g. the user
	// invoked this process by absolute path), fall back to the running
	// executable — same as the pre-#836 secondary resolution path.
	exe, err := execLookPath("lark-cli")
	if err != nil {
		exe, err = vfs.Executable()
		if err != nil {
			return fmt.Errorf("cannot locate binary: %w", err)
		}
	}
	ctx, cancel := context.WithTimeout(context.Background(), verifyTimeout)
	defer cancel()
	out, err := exec.CommandContext(ctx, exe, "--version").Output()
	if ctx.Err() == context.DeadlineExceeded {
		return fmt.Errorf("binary verification timed out after %s", verifyTimeout)
	}
	if err != nil {
		return fmt.Errorf("binary not executable: %w", err)
	}
	fields := strings.Fields(strings.TrimSpace(string(out)))
	if len(fields) == 0 {
		return fmt.Errorf("empty version output")
	}
	actual := strings.TrimPrefix(fields[len(fields)-1], "v")
	expected := strings.TrimPrefix(expectedVersion, "v")
	if actual != expected {

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