tools: Add a script to find changes in linux-firmware

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

diff --git a/tools/find-linux-firmware-changes b/tools/find-linux-firmware-changes
new file mode 100755 (executable)
index 0000000..c432e4f
--- /dev/null
+++ b/tools/find-linux-firmware-changes
@@ -0,0 +1,139 @@
+#!/bin/bash
+
+URL="https://git.ipfire.org/?p=thirdparty/linux-firmware.git;a=snapshot;h=TAG;sf=tgz"
+
+download() {
+       local version="${1}"
+       local install="${2}"
+       local target
+
+       local url="${URL/TAG/${version}}"
+
+       echo "Downloading ${version}..."
+
+       # Download and extract
+       if ! curl --silent "${url}" | tar xz -C "${tmp}"; then
+               echo "${0}: Could not download ${version}" >&2
+               return 1
+       fi
+
+       echo "Installing ${version}..."
+
+       # Install
+       pushd "linux-firmware-${version}" &>/dev/null
+
+       case "${version}" in
+               2023*)
+                       target="install"
+                       ;;
+               *)
+                       target="install-nodedup"
+                       ;;
+       esac
+
+       # Install to a new directory
+       if ! make "${target}" DESTDIR="${install}"; then
+               echo "${0}: Could not install ${version}" >&2
+               popd &>/dev/null
+               return 1
+       fi
+
+       popd &>/dev/null
+
+       return 0
+}
+
+compare() {
+       local removed_files=()
+       local changed_files=()
+
+       local line
+       while read -r line; do
+               # Find changed files
+               if [[ ${line} =~ ^Files\ OLD/(.*)\ and ]]; then
+                       changed_files+=( "${BASH_REMATCH[1]}" )
+
+               elif [[ ${line} =~ ^Only\ in\ NEW/(.*):\ (.*)$ ]]; then
+                       changed_files+=( "${BASH_REMATCH[1]}/${BASH_REMATCH[2]}" )
+
+               elif [[ ${line} =~ ^Only\ in\ OLD/(.*):\ (.*)$ ]]; then
+                       removed_files+=( "${BASH_REMATCH[1]}/${BASH_REMATCH[2]}" )
+
+               # Handle unknown lines
+               else
+                       echo "Unknown line: ${line}" >&2
+               fi
+       done <<< "$(diff --recursive --brief OLD NEW)"
+
+       local file
+
+       # List all changed files
+       if [ "${#changed_files[@]}" -gt 0 ]; then
+               echo "# Changed files"
+               for file in "${changed_files[@]}"; do
+                       echo "${file}"
+               done
+
+               echo # newline
+       fi
+
+       # List all removed files
+       if [ "${#removed_files[@]}" -gt 0 ]; then
+               echo "# Removed files"
+               echo "rm -vrf \\"
+
+               for file in "${removed_files[@]}"; do
+                       echo "  /${file} \\"
+               done
+       fi
+
+       # Total size
+       {
+               pushd NEW &>/dev/null
+
+               du -csh "${changed_files[@]}" | tail -n1
+
+               popd &>/dev/null
+       }
+
+       return 0
+}
+
+run() {
+       # Download the old and new versions
+       download "${version_old}" "${tmp}/OLD" || return $?
+       download "${version_new}" "${tmp}/NEW" || return $?
+
+       compare || return $?
+}
+
+main() {
+       local version_old="${1}"
+       local version_new="${2}"
+
+       local r=0
+
+       # Check if we have enough arguments
+       if [ -z "${version_old}" -o -z "${version_new}" ]; then
+               echo "${0}: An old and a new version are required" >&2
+               return 2
+       fi
+
+       # Create a temporary directory
+       local tmp="$(mktemp -d)"
+
+       # Change into the directory
+       pushd "${tmp}" &>/dev/null
+
+       # Run the operation...
+       run || r="${?}"
+
+       popd &>/dev/null
+
+       # Remove the temporary directory
+       rm -rf  "${tmp}"
+
+       return "${r}"
+}
+
+main "$@" || exit $?