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#!/usr/bin/env bash
# This script is like npx but also works for yarn pnp projects, and
# never tries to install anything. It is very fast.
#
# The script takes as arguments a command to execute and the arguments
# to pass to it. If the command is installed as a binary by an npm
# module in the current project, then that binary is used. Otherwise,
# the script is execed as normal from $PATH. In either case, the
# working directory is preserved.
if (( "$#" == 0 )); then
echo >&2 "usage: apheleia-npx CMD [ARG...]"
exit 1
fi
# location of this script
scripts_dir="$(cd $(dirname ${BASH_SOURCE[0]}) &>/dev/null && pwd)"
pnp_bin="${scripts_dir}/pnp-bin.js"
# This function prints the name of the current directory if it
# contains a file or directory named after the first argument, or the
# parent directory if it contains such a file, or the parent's parent,
# and so on. If no such file is found it returns nonzero.
# https://unix.stackexchange.com/a/22215
find_upwards() {
fname="$1"
path="${PWD}"
while [[ -n "${path}" && ! -e "${path}/${fname}" ]]; do
path="${path%/*}"
done
[[ -n "${path}" ]] && echo "${path}"
}
dir="$(find_upwards package.json)"
if [[ -d $dir ]]; then
cd $dir
pnp_root=$(find_upwards '.pnp.cjs')
npm_root=$(find_upwards 'node_modules')
if [[ -n ${pnp_root} && ${#pnp_root} -gt ${#npm_root} ]]; then
# trying pnp
pnp_path="${pnp_root}/.pnp.cjs"
bin="$(${pnp_bin} ${pnp_path} $1)"
# note: $bin might not be on the real filesystem,
# might be in a zip archive
if [[ -n $bin ]]; then
if [[ -f "${pnp_path}/.pnp.loader.mjs" ]]; then
loader_opt="--loader ${pnp_path}/.pnp.loader.mjs"
fi
node=$(which node)
command="${node} --require ${pnp_path} ${loader_opt} ${bin} ${@:2}"
exec ${command}
fi
elif [[ -n ${npm_root} ]]; then
# trying npm
node_modules_paths=(\
$(node -e 'console.log(require.resolve.paths("").join("\n"))'))
for path in ${node_modules_paths[@]}; do
if [[ -x "${path}/.bin/$1" ]]; then
exec "${path}/.bin/$1" "${@:2}"
fi
done
fi
fi
# Fall back to executing the command if it's installed and on the user's $PATH
exec "$@"
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