Find upwards to package root

find-parent-package-dir

#!/bin/bash

ROOT_DIR=$(git rev-parse --show-toplevel)
if [ -z "$ROOT_DIR" ]; then
  echo "Not a git repository"
  exit 1
fi

if [[ "$PWD" == "$ROOT_DIR" ]]; then
    exit 0
fi

PACKGE_FILES=(package.json go.mod Cargo.toml Gemfile)

cd ..
prev=.
while [[ "$PWD" != "$prev" ]] ; do
    # If $PWD is the git root directory, exit
    if [[ "$PWD" == "$ROOT_DIR" ]]; then
        echo "$PWD"
        exit 0
    fi

    # Check if any of the package files exist
    for file in "${PACKGE_FILES[@]}"; do
        if [ -f "$file" ]; then
            echo "$PWD"
            exit 0
        fi
    done

    prev="$PWD"
    cd ..
done

z.fish

function upp
  cd (find-parent-package-dir; or echo ".")
end