58 lines
1.6 KiB
Text
58 lines
1.6 KiB
Text
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#!/bin/sh
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# remote-run <host> <cmd...>
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#
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# Run a command on <host> inside a detached tmux session, stream output back,
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# propagate exit code. If the local ssh dies mid-run, the tmux session keeps
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# going on the remote — recover with:
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# ssh <host> tmux ls
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# ssh <host> tmux attach -t <session>
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#
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# <host> is whatever ssh accepts: a Host alias from ~/.ssh/config, a
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# user@hostname, an IP, etc.
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set -eu
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if [ $# -lt 2 ]; then
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echo "usage: $0 <host> <cmd...>" >&2
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exit 2
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fi
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host=$1
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shift
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session="claude-$(whoami)-$$-$(date +%s)"
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# Single-quote-escape the user command for safe embedding in remote bootstrap.
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user_cmd=$*
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quoted_cmd=$(printf %s "$user_cmd" | sed "s/'/'\\\\''/g")
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# Remote bootstrap — runs the user command in its own bash subshell so that
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# any `exit` or `set -e` inside it does NOT short-circuit our exit-capture.
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remote_cmd=$(cat <<REMOTE
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session='${session}'
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log="/tmp/\${session}.log"
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exitf="/tmp/\${session}.exit"
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: > "\$log"
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tmux new-session -d -s "\$session" "bash -c '${quoted_cmd}' > \$log 2>&1; echo \\\$? > \$exitf; tmux wait-for -S done-\$session" 2>/tmp/\${session}.tmuxerr
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if [ \$? -ne 0 ]; then
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echo "tmux failed to start session:" >&2
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cat /tmp/\${session}.tmuxerr >&2
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rm -f /tmp/\${session}.tmuxerr
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exit 127
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fi
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rm -f /tmp/\${session}.tmuxerr
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( tail -F "\$log" 2>/dev/null ) &
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tail_pid=\$!
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tmux wait-for done-\$session 2>/dev/null
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sleep 0.2
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kill \$tail_pid 2>/dev/null || true
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wait \$tail_pid 2>/dev/null || true
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code=\$(cat "\$exitf" 2>/dev/null || echo 1)
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tmux kill-session -t "\$session" 2>/dev/null || true
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rm -f "\$log" "\$exitf"
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exit \$code
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REMOTE
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)
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ssh "$host" "$remote_cmd"
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