Convert Legacy Framework to XCFramework

convert-framework.sh

#!/usr/bin/env bash

# Converts a legacy framework into an xcframework.
# Usage: convert-framework.sh input_framework output_xcframework

set -euo pipefail

E_BADARGS=85
if [ $# -ne 2 ]; then
    echo "Usage: $(basename $0) framework xcframework"
    exit $E_BADARGS
fi

# The source framework directory
framework_dir="$1"

# The destination xcframework location
xcframework="$2"

# Extract the basename of the framework, stripping off the path and leaving only Foo.framework
framework_basename="$(basename -- "$framework_dir")"

# Extract the name of the framework, leaving only Foo
framework_name="${framework_basename%.*}"

# Make a temporary working directory
tmpdir="$(mktemp -d ${TMPDIR:-/tmp}/convert-framework.XXXXXX)"
echo "Working directory: $tmpdir"

# This is based on an approach recommended here:
# https://github.com/twilio/twilio-voice-ios/issues/64#issuecomment-747186499

mkdir "$tmpdir/arm64"
mkdir "$tmpdir/x86_64"

cp -R "$framework_dir" "$tmpdir/arm64/$framework_basename"
cp -R "$framework_dir" "$tmpdir/x86_64/$framework_basename"

echo "Extracting arm64 from framework"
pushd "$tmpdir/arm64" > /dev/null
lipo \
    -extract arm64 \
    -output "$framework_basename/$framework_name" \
    "$framework_basename/$framework_name"
echo "Updating CFBundleSupportedPlatforms in arm64/$framework_basename/Info.plist"
plutil \
    -replace CFBundleSupportedPlatforms \
    -xml "<array><string>iPhoneOS</string></array>" \
    "$framework_basename/Info.plist"
popd > /dev/null

echo "Extracting x86_64 from framework"
pushd "$tmpdir/x86_64" > /dev/null
lipo \
    -extract x86_64 \
    -output "$framework_basename/$framework_name" \
    "$framework_basename/$framework_name"
echo "Updating CFBundleSupportedPlatforms in x86_64/$framework_basename/Info.plist"
plutil \
    -replace CFBundleSupportedPlatforms \
    -xml "<array><string>iPhoneSimulator</string></array>" \
    "$framework_basename/Info.plist"
popd > /dev/null

echo "Building xcframework at $xcframework"
xcodebuild \
    -create-xcframework \
    -framework "$tmpdir/arm64/$framework_basename" \
    -framework "$tmpdir/x86_64/$framework_basename" \
    -output "$xcframework"

echo "Done"