[cmake] Update CPMUtil (#4123)

Notable changes

- Single cpmfile
- version/min_version/git_version have been fixed and replaced with
  version and min_version
- Docs rewrite
- Legacy options are gone
- Fixed update/version commands
- Added patch creation functionality

Signed-off-by: crueter <crueter@eden-emu.dev>
Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/4123
Reviewed-by: Lizzie <lizzie@eden-emu.dev>
Reviewed-by: MaranBr <maranbr@eden-emu.dev>

tools/cpm/package/util/fetch.sh

@@ -0,0 +1,134 @@
+#!/bin/sh -e
+
+# SPDX-FileCopyrightText: Copyright 2026 crueter
+# SPDX-License-Identifier: LGPL-3.0-or-later
+
+# shellcheck disable=SC1091
+. "$SCRIPTS"/../common.sh
+
+download_package() {
+	mkdir -p "$CPM_SOURCE_CACHE"
+
+	tmp=$(make_temp_dir)
+
+	FILENAME=$(basename "$DOWNLOAD")
+
+	OUTFILE="$tmp/$FILENAME"
+
+	OUTDIR="${CPM_SOURCE_CACHE}/${LOWER_PACKAGE}/${KEY}"
+	if [ -d "$OUTDIR" ]; then return; fi
+
+	curl "$DOWNLOAD" -sS -L -o "$OUTFILE"
+
+	ACTUAL_HASH=$(sha512sum "$OUTFILE" | cut -d" " -f1)
+	if [ "$ACTUAL_HASH" != "$HASH" ]; then
+		echo "!! $FILENAME did not match expected hash; expected $HASH but got $ACTUAL_HASH" >&2
+		exit 1
+	fi
+
+	TMPDIR="$tmp/extracted"
+	mkdir -p "$OUTDIR"
+	mkdir -p "$TMPDIR"
+
+	PREVDIR="$PWD"
+	mkdir -p "$TMPDIR"
+	cd "$TMPDIR"
+
+	case "$FILENAME" in
+	*.7z)
+		must_install 7z
+		7z x "$OUTFILE" >/dev/null
+		;;
+	*.tar*)
+		# TODO: Extensions
+		must_install tar
+		tar xf "$OUTFILE" >/dev/null
+		;;
+	*.zip)
+		must_install unzip
+		unzip "$OUTFILE" >/dev/null
+		;;
+	esac
+
+	# basically if only one real item exists at the top we just move everything from there
+	# since github and some vendors hate me
+	DIRS=$(find . -maxdepth 1 -type d -o -type f)
+
+	# thanks gnu
+	if [ "$(echo "$DIRS" | wc -l)" -eq 2 ]; then
+		SUBDIR=$(find . -maxdepth 1 -type d -not -name ".")
+		mv "$SUBDIR"/* "$OUTDIR"
+		mv "$SUBDIR"/.* "$OUTDIR" 2>/dev/null || true
+		rmdir "$SUBDIR"
+	else
+		mv ./* "$OUTDIR"
+		mv ./.* "$OUTDIR" 2>/dev/null || true
+	fi
+
+	cd "$OUTDIR"
+
+	# TODO: Common custom patch/source cache dirs
+	if echo "$JSON" | grep -e "patches" >/dev/null; then
+		PATCHES=$(echo "$JSON" | jq -r '.patches | join(" ")')
+		for patch in $PATCHES; do
+			abs_patch="$CPMUTIL_PATCH_DIR/$PACKAGE/$patch"
+			if [ ! -f "$abs_patch" ]; then
+				echo "-- * Attempted to apply nonexistent patch $patch!"
+				continue
+			fi
+
+			echo "-- * Applying patch $patch"
+			patch --binary -p1 <"$abs_patch"
+		done
+	fi
+
+	cd "$PREVDIR"
+
+	rm -rf "$tmp"
+}
+
+# TODO: individual platform fetch?
+ci_package() {
+	[ "$REPO" != null ] || { echo "-- ! No repo defined" && return; }
+	mkdir -p "$CPM_SOURCE_CACHE"
+
+	echo "-- CI package $PACKAGE_NAME"
+
+	for platform in \
+		windows-amd64 windows-arm64 \
+		mingw-amd64 mingw-arm64 \
+		android-aarch64 android-x86_64 \
+		linux-amd64 linux-aarch64 \
+		macos-universal ios-aarch64; do
+		echo "-- * platform $platform"
+
+		case $DISABLED in
+		*"$platform"*)
+			echo "-- * -- disabled"
+			continue
+			;;
+		esac
+
+		FILENAME="${NAME}-${platform}-${VERSION}.${EXT}"
+		DOWNLOAD="https://$GIT_HOST/${REPO}/releases/download/v${VERSION}/${FILENAME}"
+		KEY="$platform-$VERSION"
+
+		OUTDIR="${CPM_SOURCE_CACHE}/${LOWER_PACKAGE}/${KEY}"
+		[ -d "$OUTDIR" ] && continue
+
+		HASH_URL="${DOWNLOAD}.sha512sum"
+
+		HASH=$(curl "$HASH_URL" -sS -q -L -o -)
+
+		download_package
+	done
+}
+
+fetch_package() {
+	if [ "$CI" = "true" ]; then
+		ci_package
+	else
+		echo "-- Downloading regular package $PACKAGE, with key $KEY, from $DOWNLOAD"
+		download_package
+	fi
+}