update-remote-patches.sh

#!/bin/bash

repo_directory=$(pwd)

readonly vanadium_patches_path="./vanadium_patches/"
readonly vanadium_git_url="https://github.com/GrapheneOS/Vanadium.git"
current_vanadium_patches=()
truncated_vanadium_patches=()
remote_vanadium_patches=()
truncated_remote_vanadium_patches=()

readonly fedora_patches_path="./fedora_patches/"
readonly fedora_git_url="https://src.fedoraproject.org/rpms/chromium.git"
current_fedora_patches=()
remote_fedora_patches=()

get_remote_vanadium_patches() {
	cd vanadium-patches-tmp/
	retry=0
	while [ true ]; do
		git clone $vanadium_git_url
		if [ ! -d Vanadium/patches/ ]; then
			rm -rf Vanadium/
			echo "ERROR! git operation failed!"
			if [[ $retry > 0 ]]; then
				echo "Failed to clone $((retry+1)) times..."
			fi
			if [[ $retry == 2 ]]; then
				echo "Aborting!"
				cd $repo_directory
				rm -rf vanadium-patches-tmp/
				exit 1
			fi
			echo "Retrying..."
			retry=$((retry+1))
		else
			break
		fi
	done
	cd Vanadium/patches/
	remote_vanadium_patches=(*.patch)
	for ((i=0; i<${#remote_vanadium_patches[@]}; i++)); do
		if [[ ${remote_vanadium_patches[$i]} =~ ^[0-9]{4}[\-] ]]; then
			truncated_remote_vanadium_patches[$i]="${remote_vanadium_patches[$i]:4}"
		else
			echo "ERROR! Remote patch ${remote_vanadium_patches[$i]} does match expected naming scheme!"
			echo "Aborting!"
			cd $repo_directory
			rm -rf vanadium-patches-tmp/
			exit 1
		fi
	done
	cd $repo_directory
}

update_vanadium_patches() {
	get_remote_vanadium_patches
	cd $vanadium_patches_path
	current_vanadium_patches=(*.patch)
	for ((i=0; i<${#current_vanadium_patches[@]}; i++)); do
		truncated_vanadium_patches[$i]="${current_vanadium_patches[$i]:4}"
	done
	updated_counter=0
	removed_counter=0
	patch_not_found_counter=0
	for ((i=0; i<${#truncated_vanadium_patches[@]}; i++)); do
		for ((j=0; j<${#truncated_remote_vanadium_patches[@]}; j++)); do
			if [[ "${truncated_remote_vanadium_patches[$j]}" == "${truncated_vanadium_patches[$i]}" ]]; then
				if [[ "${remote_vanadium_patches[$j]}" == "${current_vanadium_patches[$i]}" ]]; then
					echo "Updating patch ${current_vanadium_patches[$i]}"
					echo "	No name change"
				else
					echo "Updating patch ${current_vanadium_patches[$i]}"
					echo "	Patch renamed to: ${remote_vanadium_patches[$j]}"
				fi
				rm ${current_vanadium_patches[$i]}
				cp $repo_directory/vanadium-patches-tmp/Vanadium/patches/${remote_vanadium_patches[$j]} ./
				updated_counter=$((updated_counter+1))
			else
				patch_not_found_counter=$((patch_not_found_counter+1))
			fi
		done
		# Assume, since the patch has not been found, the patch has been removed
		if [[ $patch_not_found_counter == ${#truncated_remote_vanadium_patches[@]} ]]; then
			echo "Removing ${current_vanadium_patches[i]}"
			echo "	Patch has been removed in Vanadium"
			rm ${current_vanadium_patches[$i]}
			removed_counter=$((removed_counter+1))
		fi
		patch_not_found_counter=0
	done
	echo ""
	echo "Updated $updated_counter patches."
	echo "Removed $removed_counter patches."
	cd $repo_directory
}

update_fedora_patches() {
	cd fedora-patches-tmp
	git clone $fedora_git_url
	cd chromium
	remote_fedora_patches=(*.patch)
	cd $repo_directory/$fedora_patches_path
	current_fedora_patches=(*.patch)
	updated_counter=0
	removed_counter=0
	patch_not_found_counter=0
	for ((i=0; i<${#current_fedora_patches[@]}; i++)); do
		for ((j=0; j<${#remote_fedora_patches[@]}; j++)); do
			if [[ "${remote_fedora_patches[$j]}" == "${current_fedora_patches[$i]}" ]]; then
				echo "Updating patch ${current_fedora_patches[$i]} from Fedora"
				rm ${current_fedora_patches[$i]}
				cp $repo_directory/fedora-patches-tmp/chromium/${remote_fedora_patches[$j]} ./
				updated_counter=$((updated_counter+1))
			else
				patch_not_found_counter=$((patch_not_found_counter+1))
			fi
		done
		if [[ $patch_not_found_counter == ${#remote_fedora_patches[@]} ]]; then
			echo "Deleting removed patch ${current_fedora_patches[i]}"
			rm ${current_fedora_patches[$i]}
			removed_counter=$((removed_counter+1))
		fi
		patch_not_found_counter=0
	done
	echo ""
	echo "Updated $updated_counter patches."
	echo "Removed $removed_counter patches."
	cd $repo_directory
}

mkdir vanadium-patches-tmp/ # create a temporary directory for cloning the Vanadium patches
update_vanadium_patches
rm -rf vanadium-patches-tmp/ # cleanup

mkdir fedora-patches-tmp/ # create a temporary directory for cloning the Fedora patches
update_fedora_patches
rm -rf fedora-patches-tmp/ # cleanup
exit 0