Lerna publishing only changed packages (ignore transitive dependants)

_filePathsToPackageNames.js

#!/usr/bin/env node

/**
 * Accepts a string of space separated files generated by git
 * Returns a string of comma separated @scoped/package names
 */

const commander = require('commander');

const packageRootMatch = /^packages\//;
const packageNameCapture = /^packages\/(.+?)\//;

console.log(commander
    .parse(process.argv).args
    // Filter out non package files
    .filter(filePath => filePath.match(packageRootMatch))
    // Map file paths to package names (assumes package names === containing folder names bar scope)
    .map(filePath => filePath.match(packageNameCapture)[1])
    // Filter out duplicates
    .filter((packageName, idx, arr) => arr.indexOf(packageName) === idx)
    // Map package names to scoped package names
    // .map(packageName => `@SCOPE/${packageName}`)
    // Return as a comma separated string for consumption by `lerna publish --scope={...}`
    .join(','));

package.json

{
  "scripts": {
    "publish/transitive": "lerna publish",
    "publish/changed": "./scripts/publish.changed.sh"
  },
  "dependencies": {
    "commander": "^2.11.0"
  }
}

publish.changed.sh

#!/bin/bash

BIN_PATH=$(yarn bin)
LERNA="$BIN_PATH/lerna"

BRANCH=$(git rev-parse --abbrev-ref HEAD)

if [ "$BRANCH" != "master" ]; then
    exit 1
fi

LAST_PUBLISH_SHA=$(git log :/Publish --pretty=format:"%H" -1)
FILES_CHANGED=$(git diff --name-only ${LAST_PUBLISH_SHA})
PKGS=$(./_filePathsToPackageNames.js ${FILES_CHANGED})
PACKAGE_NUMBER=${PKGS//[^ ]}
[[ "${#PACKAGE_NUMBER}" -gt 0 ]] && SCOPE={${PKGS// /,}} || SCOPE=${PKGS}

${LERNA} publish --scope=${SCOPE}