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#!/bin/false
command -v recursive_dependencies >/dev/null ||
source dependencies.bash
# 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: "$0" - copied to remote bash's $0
# Input: $1 - shell script source code to run in the remote bash
# Input: $2, $3, ... - command line arguments passed to the remote bash as $1, $2, ...
# Input: stdin, stdout, stderr: passed to the remote bash over ssh
# Input: "$SHELL" - remote shell to launch (better be bash)
__bashrpc__remote_run_script()
{
local script="$1"
shift
BASH_RPC_SHELL_OPTIONS=(--norc --noprofile)
# printf 'DEBUG:<%s>\n' "${BASH_RPC_SSH_OPTIONS[@]}" >&2
exec ssh \
"${BASH_RPC_SSH_OPTIONS[@]}" -- \
"${BASH_RPC_REMOTE_DEST:-localhost}" \
"$SHELL" "${BASH_RPC_SHELL_OPTIONS[@]}" \
-c "${script@Q}" \
"$0" "${@@Q}"
}
with_ssh_options() { __bashrpc__with_ssh_options "$@"; }
__bashrpc__with_ssh_options()
{
local -a BASH_RPC_SSH_OPTIONS
while [ "$1" != '--' ]
do
if [ $# -gt 0 ]
then
BASH_RPC_SSH_OPTIONS+=("$1")
shift
continue
fi
>&2 printf '%s: Error: %s\n' "$0" \
'with_ssh_options(): expected argument "--" not found'
exit 1
done
shift
"$@"
}
with_ssh_option() { __bashrpc__with_ssh_option "$@"; }
__bashrpc__with_ssh_option()
{
local -a BASH_RPC_SSH_OPTIONS=("${BASH_RPC_SSH_OPTIONS[@]}")
BASH_RPC_SSH_OPTIONS+=("$1")
shift
"$@"
}
# Preserves the rest of stdin for the command.
__bashrpc__eval_stdin()
{
[ "$1" ] && read -N"$1" -r || return
# Prepare "$@" for script execution context.
shift
# Even unset REPLY to leave pristine environment.
eval "unset REPLY; $REPLY"
}
__bashrpc__run_function_simple()
{
script_source=$(declare -f "$1" && printf '"$@";\n')
__bashrpc__remote_run_script \
"$script_source" \
"$@"
}
__bashrpc__notty_stage1()
{
[ "$1" ] &&
read -N"$1" -r && # Read script from stdin, munges REPLY
shift && # Prepare "$@" for script execution context.
eval "unset REPLY; $REPLY" # Unset munged REPLY in exec context
}
__bashrpc__remote_run_stage1_notty()
{
stage1_source=$(
declare -f __bashrpc__notty_stage1 |
sed -Ene 's/^ {4}//p'
)
stage2_source=$1
shift
{
printf '%s' "$stage2_source"
cat
} |
__bashrpc__remote_run_script \
"$stage1_source" "${#stage2_source}" \
"$@"
}
__bashrpc__read_stdin()
{
REPLY=
read -r -N2147483647 || [ "$REPLY" ]
}
__bashrpc__tty_stage1()
{
local SET_TERM="$1"
local PRELUDE="shift;${BASH_RPC_TRACE_REMOTE:+ set -x;}"
__bashrpc__read_stdin <<END
# We saved stage2 in TERM.
# Store it in parameter 1:
set -- "\$TERM" "\$@"
# Restore original TERM:
TERM=${SET_TERM@Q}
# Run stage2:
source <(printf '%s\n%s' ${PRELUDE@Q} "\$1")
END
printf '%s' "$REPLY"
}
__bashrpc__remote_run_stage1_tty()
{
stage2_source=$1
stage1_source=$(__bashrpc__tty_stage1 "$TERM" | grep -v '^#')
shift
(
# printf 'DEBUG2:<%s>\n' "${BASH_RPC_SSH_OPTIONS[@]}" >&2
TERM="$stage2_source" \
__bashrpc__with_ssh_option -t \
__bashrpc__remote_run_script \
"$stage1_source" "$@"
)
}
remote_run_function()
{
main=$1
# funcs=$(compgen -A function)
funcs=$(recursive_dependencies "$main")
stage2_source=$(
declare -f $funcs
printf '"$@"\n'
)
if [ -t 0 ]
then
__bashrpc__remote_run_stage1_tty "$stage2_source" "$@"
else
__bashrpc__remote_run_stage1_notty "$stage2_source" "$@"
fi
}
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