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|
intersection()
{
comm -12 "$@"
}
difference()
{
comm -23 "$@"
}
extract_words()
{
grep -o -E '\b\w+\b' | sort -u
}
immediate_dependencies1()
{
intersection \
<(compgen -A function | sort -u) \
<(declare -f "$1" | extract_words)
}
immediate_dependencies()
{
for f
do
immediate_dependencies1 "$f"
done | sort -u
}
recursive_dependencies()
{
seen=()
while [ $# -gt 0 ]
do
seen+=("$@")
set -- $(difference <(immediate_dependencies "$@") \
<(printf '%s\n' "${seen[@]}" | sort -u))
done
printf '%s\n' "${seen[@]}"
}
# Input: $BASH_RPC_REMOTE_DEST - hostname passed to ssh (uses ssh host aliases)
# Input: $BASH_RPC_SSH_OPTIONS - option arguments passed to ssh (they precede '--')
# Input; $BASH_RPC_STDIN_IS_TTY - controls whether to allocate ssh pty. Doesn't work.
# Input: $1 - shell script source code to run in the remote bash
# Input: $2, $3, ... - command line arguments passed to the remote bash
# Input: stdin, stdout, stderr: passed to the remote bash over ssh
# Input: "$0" - copied to remote bash's $0
# Input: "$SHELL" - remote shell to launch (better be bash)
bash_rpc_remote_run_script()
{
local script="$1"
shift
exec ssh \
"${BASH_RPC_SSH_OPTIONS[@]}" -- \
"${BASH_RPC_REMOTE_DEST:-localhost}" \
"$SHELL" -c "${script@Q}" "$0" "${@@Q}"
}
bash_rpc_with_ssh_option()
{
local BASH_RPC_SSH_OPTIONS
BASH_RPC_SSH_OPTIONS+=("$1")
shift
"$@"
}
# Preserves the rest of stdin for the command.
bash_rpc_eval_stdin()
{
[ "$1" -gt 0 ] || return
read -N"$1" -r || return
# Prepare "$@" for script execution context.
shift
# Even unset REPLY to leave pristine environment.
eval "unset REPLY; $(cat <<< "$REPLY")"
}
bash_rpc_run_function_simple()
{
script_source=$(declare -f "$1" && printf '"$@";\n')
bash_rpc_remote_run_script \
"$script_source" \
"$@"
}
remote_run_function_notty()
{
main=$1
funcs=$(recursive_dependencies "$main")
stage2_source=$(
declare -f $funcs
printf '"$@"\n'
)
{
printf '%s' "$stage2_source"
cat
} |
bash_rpc_run_function_simple \
bash_rpc_eval_stdin \
"${#stage2_source}" \
"$@"
}
read_stdin()
{
REPLY=
read -r -N2147483647 || [ "$REPLY" ]
}
remote_run_function_tty()
{
main=$1
funcs=$(recursive_dependencies "$main")
stage2_source=$(
declare -f $funcs
printf 'TERM=%s\n' "${TERM@Q}"
printf '"$@"\n'
)
(
TERM="$stage2_source"
export TERM
read_stdin <<'END'
rpc=$TERM
TERM=screen
source <(printf '%s' "$rpc")
END
exec ssh localhost -t -- bash -c "${REPLY@Q}" bash "$@"
)
}
remote_run_function()
{
if [ -t 0 ]
then
remote_run_function_tty "$@"
else
remote_run_function_notty "$@"
fi
}
|
