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Harden cmux ssh for mixed-version remote sessions

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This commit is contained in:
Lawrence Chen 2026-02-24 22:09:27 -08:00
parent 2b7928aa60
commit daa340fa87
8 changed files with 142 additions and 31 deletions
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12
CLI/cmux.swift
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@ -2128,9 +2128,19 @@ struct CMUXCLI {
parts.append("-tt")
}
if !hasSSHOptionKey(options.sshOptions, key: "RemoteCommand") {
var startupExports = [
"export PATH=\"$HOME/.cmux/bin:$PATH\"",
]
if options.remoteRelayPort > 0 {
// Pin this shell to the relay allocated for this workspace so parallel
// SSH sessions (including from different cmux versions) don't race on
// shared ~/.cmux/socket_addr.
startupExports.append("export CMUX_SOCKET_PATH=127.0.0.1:\(options.remoteRelayPort)")
}
startupExports.append("exec \"${SHELL:-/bin/zsh}\" -l")
parts += [
"-o",
"RemoteCommand=export PATH=\"$HOME/.cmux/bin:$PATH\"; exec \"${SHELL:-/bin/zsh}\" -l",
"RemoteCommand=\(startupExports.joined(separator: "; "))",
]
}
parts.append(options.destination)