Meta: Always check completeness of ALL_THE_DEBUG_MACROS

Meta/check-debug-flags.sh

@@ -0,0 +1,36 @@
+#!/bin/bash
+
+set -eo pipefail
+
+script_path=$(cd -P -- "$(dirname -- "$0")" && pwd -P)
+cd "${script_path}/.."
+
+MISSING_FLAGS=n
+
+while IFS= read -r FLAG; do
+    # We simply search whether the CMakeLists.txt *ever* sets the flag.
+    # There are (basically) no false positives, but there might be false negatives,
+    # for example we intentionally don't check for commented-out lines here.
+    if ! grep -qP "set\(CMAKE_CXX_FLAGS \".* -D${FLAG}" CMakeLists.txt ; then
+        echo "ALL_THE_DEBUG_MACROS probably doesn't include ${FLAG}"
+        MISSING_FLAGS=y
+    fi
+done < <(
+    git ls-files -- \
+        '*.cpp' \
+        '*.h' \
+        ':!:Kernel/FileSystem/ext2_fs.h' \
+        ':!:Libraries/LibELF/exec_elf.h' \
+    | xargs grep -P '^ *#.*DEBUG' \
+    | sed -re 's,^.*[^a-zA-Z0-9_]([a-zA-Z0-9_]*DEBUG[a-zA-Z0-9_]*).*$,\1,' \
+    | sort \
+    | uniq
+)
+
+if [ "n" != "${MISSING_FLAGS}" ] ; then
+    echo "Some flags are missing for the ALL_THE_DEBUG_MACROS feature in CMakeLists.txt."
+    echo "If you just added a new SOMETHING_DEBUG flag, that's great!"
+    echo "We want to enable all of these in automated builds, so that the code doesn't rot."
+    echo "Please add it to the ALL_THE_DEBUG_MACROS section."
+    exit 1
+fi