Create script to mutate Package.swift checksum.

Author: arik-so

.github/workflows/swift.yml

@@ -29,11 +29,11 @@ jobs:
                     LDK_SWIFT_GENERATOR_OUTPUT_DIRECTORY_PATH: ci/LDKSwift/Sources/LDKSwift/bindings
             -   name: Copy new headers into bindings
                 run: |
-                    cd ci
-                    mkdir -p ./LDKSwift/Sources/LDKHeaders/include
-                    cp ldk-c-bindings/lightning-c-bindings/include/*.h ./LDKSwift/Sources/LDKHeaders/include/
-                    cp ldk-c-bindings/ldk-net/ldk_net.h ./LDKSwift/Sources/LDKHeaders/include/
-                    cp ldk-c-bindings/ldk-net/ldk_net.c ./LDKSwift/Sources/LDKHeaders/
+                    python3 ./src/scripts/copy_c_files.py
+                env:
+                    LDK_C_BINDINGS_BASE: /home/runner/work/ldk-swift/ldk-swift/ci/ldk-c-bindings
+                    H_FILE_OUTPUT_DIRECTORY: /home/runner/work/ldk-swift/ldk-swift/ci/LDKSwift/Sources/LDKHeaders/include
+                    C_FILE_OUTPUT_DIRECTORY: /home/runner/work/ldk-swift/ldk-swift/ci/LDKSwift/Sources/LDKHeaders
             -   name: Check that the latest auto-generated Swift files are in the repo
                 run: |
                     python3 ./ # Generate bindings into local directory

src/scripts/copy_c_files.py

@@ -10,24 +10,35 @@ def run(config: ScriptConfig):
 		os.path.join(config.LDK_C_BINDINGS_BASE, 'ldk-net'),
 	]
 
-	header_destination_directory = config.C_FILE_OUTPUT_DIRECTORY
+	c_file_destination_directory = config.C_FILE_OUTPUT_DIRECTORY
+	header_destination_directory = config.H_FILE_OUTPUT_DIRECTORY
+	os.makedirs(c_file_destination_directory, exist_ok=True)
 	os.makedirs(header_destination_directory, exist_ok=True)
 
+	if c_file_destination_directory != header_destination_directory:
+		print('Copying C files to', c_file_destination_directory)
 	print('Copying headers to', header_destination_directory)
 
 	for current_directory in header_directories:
 		for current_file in os.listdir(current_directory):
 
-			is_relevant_file = current_file.endswith('.h') or current_file.endswith('.c')
+			is_header_file = current_file.endswith('.h')
+			is_c_file = current_file.endswith('.c')
+
+			is_relevant_file = is_header_file or is_c_file
 			if not is_relevant_file:
 				continue
 
 			current_path = os.path.join(current_directory, current_file)
 			if not os.path.isfile(current_path):
 				continue
 
+			current_destination_directory = header_destination_directory
+			if is_c_file:
+				current_destination_directory = c_file_destination_directory
+
 			print('Copying', current_path)
-			subprocess.check_call(['cp', current_path, header_destination_directory])
+			subprocess.check_call(['cp', current_path, current_destination_directory])
 
 
 if __name__ == '__main__':

src/scripts/script_config.py

@@ -33,6 +33,7 @@ def __init__(self):
 		self.RUST_CONFIGURATION_FLAG: str = ''
 		self.LIPO_BINARY_OUTPUT_DIRECTORY: str = ''
 		self.C_FILE_OUTPUT_DIRECTORY: str = ''
+		self.H_FILE_OUTPUT_DIRECTORY: str = ''
 		self.PRESERVE_XCARCHIVES: bool = False
 
 	@classmethod
@@ -108,10 +109,19 @@ def parse(cls, allow_ldk_argument=True, parse_configuration=False, parse_lipo_ou
 			# parse build config aspect
 			platform = os.getenv('PLATFORM_NAME')
 			llvm_target_triple_suffix = os.getenv('LLVM_TARGET_TRIPLE_SUFFIX')
-			architectures = os.getenv('ARCHS').split(' ')
-			ldkBuildConfig = BuildConfig(platform, llvm_target_triple_suffix, architectures)
-			config.LIBLDK_BUILD_CONFIGURATIONS = [ldkBuildConfig]
-
-			pass
+			architecture_input_string = os.getenv('ARCHS')
+			if platform and architecture_input_string:
+				architectures = architecture_input_string.split(' ')
+				ldkBuildConfig = BuildConfig(platform, llvm_target_triple_suffix, architectures)
+				config.LIBLDK_BUILD_CONFIGURATIONS = [ldkBuildConfig]
+
+		output_directory_override = os.getenv('C_FILE_OUTPUT_DIRECTORY')
+		if output_directory_override:
+			config.C_FILE_OUTPUT_DIRECTORY = output_directory_override
+
+		config.H_FILE_OUTPUT_DIRECTORY = config.C_FILE_OUTPUT_DIRECTORY
+		header_output_directory_override = os.getenv('H_FILE_OUTPUT_DIRECTORY')
+		if header_output_directory_override:
+			config.H_FILE_OUTPUT_DIRECTORY = header_output_directory_override
 
 		return config

src/scripts/update_swift_package_checksum.py

@@ -0,0 +1,42 @@
+import json
+import os
+import re
+import sys
+
+
+def run(new_checksum: str):
+	print("setting checksum (JSON-serialization):")
+	print(json.dumps(new_checksum))
+
+	if not new_checksum.isalnum():
+		print('Checksum must be alphanumeric.', file=sys.stderr)
+		sys.exit(1)
+
+	if not new_checksum.islower():
+		print('Checksum must be lowercase.', file=sys.stderr)
+		sys.exit(1)
+
+	try:
+		int(new_checksum, 16)
+	except:
+		print('Checksum must be hexadecimal.', file=sys.stderr)
+		sys.exit(1)
+
+
+	package_file_path = os.path.realpath(os.path.join(os.path.dirname(__file__), '../../Package.swift'))
+	print(package_file_path)
+	regex = re.compile("(let[\s]+checksum[\s]*=[\s]*)(.*)")
+
+	with open(package_file_path, 'r') as package_file_handle:
+		package_file = package_file_handle.read()
+		previous_checksum = regex.search(package_file).group(2)
+		# new_package_file = regex.sub(f'\g<1>"{new_checksum}"', package_file)
+		new_package_file = package_file.replace(previous_checksum, f'"{new_checksum}"')
+		with open(package_file_path, "w") as f:
+			f.write(new_package_file)
+
+
+
+if __name__ == '__main__':
+	new_checksum = sys.argv[1]
+	run(new_checksum)