[cmake] CPMUtil rewrite of the day number 852 (#4130)

Composite PR for several changes to CPMUtil, most notably:
- https://git.crueter.xyz/CMake/CPMUtil/pulls/19
- https://git.crueter.xyz/CMake/CPMUtil/pulls/22
- https://git.crueter.xyz/CMake/CPMUtil/pulls/24
- https://git.crueter.xyz/CMake/CPMUtil/pulls/25

These contain a lot of changes that generally simplify control flow and improve ease-of-use. Read those descriptions and patchsets for more info.

Signed-off-by: crueter <crueter@eden-emu.dev>
Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/4130
Reviewed-by: CamilleLaVey <camillelavey99@gmail.com>
Reviewed-by: MaranBr <maranbr@eden-emu.dev>

tools/cpmutil.sh

@@ -7,8 +7,7 @@
 
 ROOTDIR=$(CDPATH='' cd -- "$(dirname -- "$0")/cpm" && pwd)
 SCRIPTS="$ROOTDIR"
-
-. "$SCRIPTS"/common.sh
+CMAKE="$ROOTDIR/cmake"
 
 RETURN=0
 
@@ -26,33 +25,55 @@ General command-line utility for CPMUtil operations.
 Commands:
     package Run operations on a package or packages
     format  Format cpmfile
+    ls  	List all packages in the cpmfile
     update  Update CPMUtil and its tooling
     migrate Convert submodules to a basic cpmfile
 
 Package commands:
-    hash    	Verify the hash of a package, and update it if needed
-    update  	Check for updates for a package
-    fetch   	Fetch a package and place it in the cache
-    add     	Add a new package
-    rm      	Remove a package
-    version 	Change the version of a package
-    which   	Check if a package is defined
-    download 	Get the download URL for a package
-    dir     	Get the local directory for a package
-    reset   	Reset a fetched package to its original state
-    patch   	Create an in-tree patch based on local modifications
+    hash            	Verify the hash of a package, and update it if needed
+    update          	Check for updates for a package
+    fetch           	Fetch a package and place it in the cache
+    add             	Add a new package
+    rm              	Remove a package
+    version         	Change the version of a package
+    which           	Check if a package is defined
+    url             	Get the download URL for a package
+    dir             	Get the local directory for a package
+    reset           	Reset a fetched package to its original state
+    patch           	Create an in-tree patch based on local modifications
 
 EOF
 
 	exit $RETURN
 }
 
-export ROOTDIR
+export ROOTDIR CMAKE SCRIPTS
 
 while :; do
 	case "$1" in
-	format | update | migrate)
-		"$SCRIPTS/$1".sh
+	format | update)
+		cmake -P "$CMAKE/$1".cmake
+		break
+		;;
+	ls)
+		shift
+		print_usage=false
+		filtered=""
+		for arg in "$@"; do
+			case "$arg" in
+			-h | --help) print_usage=true ;;
+			-n) ;;
+			*) filtered="$filtered $arg" ;;
+			esac
+		done
+		cmake_defines=""
+		$print_usage && cmake_defines="-DPRINT_USAGE=TRUE"
+		# shellcheck disable=SC2086
+		cmake $cmake_defines -P "$CMAKE/ls.cmake" -- $filtered
+		break
+		;;
+	migrate)
+		"$SCRIPTS"/migrate.sh
 		break
 		;;
 	package)