exportify.sh

#!/bin/bash

# script to transform ecmascript.mjs to use exported functions

cd polyfill/lib

# Exports from ES2022
sed -i '' 's/^const ES2022 =/export/' ecmascript.mjs

# Beginning and ending of ES object
sed -i '' 's/^export const ES = ObjectAssign({}, ES2022, {//' ecmascript.mjs
sed -i '' 's/^});//' ecmascript.mjs

# If nothing else is using ObjectAssign, delete its declaration
if [[ $(grep -c 'ObjectAssign' ecmascript.mjs) -eq 1 ]]
then
  sed -i '' '/ObjectAssign/d' ecmascript.mjs
fi

# SystemUTCEpochNanoSeconds is an IIFE that returns a function
sed -i '' 's/  SystemUTCEpochNanoSeconds: (() => {/  export const SystemUTCEpochNanoSeconds = (() => {/' ecmascript.mjs
sed -i '' 's/  })(),/  })();/' ecmascript.mjs

# Remove commas after each function
sed -i '' 's/^  },$/  }/' ecmascript.mjs

# Non-arrow functions first line with one line of params
sed -E -i '' 's/^  ([a-zA-Z0-9_]+): \((.*)\) => {/  export function \1(\2) {/' ecmascript.mjs

# One-line arrow functions first line
sed -E -i '' 's/^  ([a-zA-Z0-9_]+): \((.*)\) => (.*),$/  export function \1(\2) { return \3; }/' ecmascript.mjs

# Multi-line arrow functions: IsTemporalDuration, IsTemporalTime, IsTemporalDateTime:
sed -E -i '' 's/^  ([a-zA-Z0-9_]+): \((.*)\) =>$/  export function \1(\2) { return (/' ecmascript.mjs
# Special cases for the end of those three functions
sed -E -i '' 's/^    ),$/    )); }/' ecmascript.mjs
sed -E -i '' 's/^    !HasSlot\(item, ISO_YEAR, ISO_MONTH, ISO_DAY\),$/    !HasSlot(item, ISO_YEAR, ISO_MONTH, ISO_DAY)); }/' ecmascript.mjs
sed -E -i '' 's/^    HasSlot\(item, YEARS, MONTHS, DAYS, HOURS, MINUTES, SECONDS, MILLISECONDS, MICROSECONDS, NANOSECONDS\),$/    HasSlot(item, YEARS, MONTHS, DAYS, HOURS, MINUTES, SECONDS, MILLISECONDS, MICROSECONDS, NANOSECONDS)); }/' ecmascript.mjs

# Exported functions defined locally
sed -E -i '' 's/^  (ToPositiveIntegerWithTruncation|ToIntegerWithTruncation|ToIntegerIfIntegral),$//' ecmascript.mjs
sed -E -i '' 's/^const (.*) = \((.*)\) => {$/  export function \1(\2) {/' ecmascript.mjs

# Special case the REQUIRED symbol
sed -i '' "s/  REQUIRED: Symbol('~required~'),/  export const REQUIRED = Symbol('~required~');/" ecmascript.mjs

# Multi-line parameter lists
sed -E -i '' 's/^  \) => {$/  ) {/' ecmascript.mjs

# Non-arrow functions first line with multiple lines of params
sed -E -i '' 's/^  (.*): \(/  export function \1(/' ecmascript.mjs

# Special case for one function defined without an arrow but also without the function keyword
sed -E -i '' 's/^  DifferenceInstant\(/  export function DifferenceInstant(/' ecmascript.mjs

# Remove "ES."
sed -E -i '' 's/ES\.//g' ecmascript.mjs

# Add a blank line before each export (doubled blanks will be removed by prettier)
sed -E -i '' $'s/^  export/\\\n  export/' ecmascript.mjs

# Fix imports in other polyfill files
for i in *.mjs; do sed -i '' 's/import { ES } from/import * as ES from/g' $i; done

# Fix imports in test code
cd ../test
for i in *.mjs; do sed -i '' 's/import { ES } from/import * as ES from/g' $i; done

cd ../..

# Fix up spacing in ecmascript.mjs
npm run pretty