Generate public API for a swift module using sourcekitten

generate_api.sh

#!/bin/sh

cd $(dirname "$0")

# Extract the toolchain identifier
export TOOLCHAIN_IDENTIFIER=$(/usr/libexec/PlistBuddy -c "Print :Identifier" "$(printenv TOOLCHAIN_DIR)/ToolchainInfo.plist")

# Replace the {{KEY}} with the values from the environment variables
cat request_template.yml | perl -pe 's/\{\{(\w+)\}\}/$ENV{$1}/eg' > $PROJECT_DIR/request.yml

# Perform the sourcekitten request with the generated request yaml, extract the source 
sourcekitten request --yaml $PROJECT_DIR/request.yml | jq -r '.["key.sourcetext"]' > $PROJECT_DIR/API.swift

rm $PROJECT_DIR/request.yml

echo "// swiftlint:disable all" | cat - $PROJECT_DIR/API.swift > $PROJECT_DIR/API.swift.orig && mv $PROJECT_DIR/API.swift.orig $PROJECT_DIR/API.swift

cd -

request_template.yaml

key.request: source.request.editor.open.interface
key.name: "67107f27-4edd-4bc4-8072-fa27b6564a05"
key.compilerargs:
    - "-target"
    - "{{NATIVE_ARCH_ACTUAL}}-apple-{{SWIFT_PLATFORM_TARGET_PREFIX}}{{IPHONEOS_DEPLOYMENT_TARGET}}"
    - "-sdk"
    - "{{SDK_DIR}}"
    - "-I"
    - "{{CONFIGURATION_BUILD_DIR}}"
    - "-F"
    - "{{CONFIGURATION_BUILD_DIR}}"
    - "-I"
    - "{{CONFIGURATION_BUILD_DIR}}/include"
key.modulename: "{{PRODUCT_MODULE_NAME}}"
key.toolchains:
    - "{{TOOLCHAIN_IDENTIFIER}}"
key.synthesizedextensions: 1

https://github.com/jpsim/SourceKitten
https://github.com/stedolan/jq