linkpackage

#!/bin/zsh

# Usage: linkpackage <path>
# Will update package.json in the current directory to link to the package at <path>
# Intended to replicate the experience of running `yarn link <package>`

LINKED_PACKAGE_PATH=$1

if [ ! -d "$LINKED_PACKAGE_PATH" ]; then
  echo "$LINKED_PACKAGE_PATH is not a directory"
  exit 1
fi

LINKED_PACKAGE_PATH=$(realpath "$LINKED_PACKAGE_PATH")

LINKED_PACKAGE_JSON="$LINKED_PACKAGE_PATH/package.json"

if [ ! -f "$LINKED_PACKAGE_JSON" ]; then
  echo "$PACKAGE_PATH does not contain a package.json file"
  exit 1
fi

if ! LINKED_PACKAGE_NAME=$(jq -r -e '.name' "$LINKED_PACKAGE_JSON"); then
  echo "Could not read package name from $LINKED_PACKAGE_JSON"
  exit 1
fi

TARGET_PACKAGE_JSON="./package.json"
WORKING_PACKAGE_JSON="./package.json.tmp"

if jq -e '.dependencies."'"$LINKED_PACKAGE_NAME"'"' < $TARGET_PACKAGE_JSON > /dev/null ; then
  jq '.dependencies."'"$LINKED_PACKAGE_NAME"'" = "link:'"$LINKED_PACKAGE_PATH"'"' < "$TARGET_PACKAGE_JSON" > "$WORKING_PACKAGE_JSON"
  mv "$WORKING_PACKAGE_JSON" "$TARGET_PACKAGE_JSON"
  echo "Linked $LINKED_PACKAGE_NAME in dependencies"
  PACKAGE_JSON_UPDATED=true
fi

if jq -e '.devDependencies."'"$LINKED_PACKAGE_NAME"'"' < $TARGET_PACKAGE_JSON > /dev/null ; then
  jq '.devDependencies."'"$LINKED_PACKAGE_NAME"'" = "link:'"$LINKED_PACKAGE_PATH"'"'  < "$TARGET_PACKAGE_JSON" > "$WORKING_PACKAGE_JSON"
  mv "$WORKING_PACKAGE_JSON" "$TARGET_PACKAGE_JSON"
  echo "Linked $LINKED_PACKAGE_NAME in devDependencies"
  PACKAGE_JSON_UPDATED=true
fi

if [ "$PACKAGE_JSON_UPDATED" = true ]; then
  echo "Please run pnpm install to use the linked package"
else
  echo "No changes made to $TARGET_PACKAGE_JSON"
fi