From 384a9c451a4603932a9cab8bf0e488af38a8a850 Mon Sep 17 00:00:00 2001
From: Jan Edmund Lazo <janedmundlazo@hotmail.com>
Date: Sun, 28 Jun 2026 02:44:13 -0400
Subject: [PATCH] build(vim-patch): detect N/A C files based on diff

vim_na_cfuncs.txt lists Vim C functions that are N/A to Nvim.
Listed in 'src/proto/*.proto' files.
Based on ':h vim-diff'.

- features (ie. balloon, tabpanel)
- Ex-commands
- eval functions (ie. f_err_teapot())

On top of the existing algorithm,
scan diff hunks on C files to filter out N/A C functions.
If the remaining hunk contains applicable changes,
then the patch is applicable.
If the patch does not modify C files, then it is likely applicable.
---
 scripts/vim-patch.sh      | 37 +++++++++++++++++++++++++------------
 scripts/vim_na_cfuncs.txt | 39 +++++++++++++++++++++++++++++++++++++++
 2 files changed, 64 insertions(+), 12 deletions(-)
 create mode 100644 scripts/vim_na_cfuncs.txt

diff --git a/scripts/vim-patch.sh b/scripts/vim-patch.sh
index c6c35f3dba..26c02eb95c 100755
--- a/scripts/vim-patch.sh
+++ b/scripts/vim-patch.sh
@@ -901,21 +901,34 @@ is_na_patch() {
   local patch=$1
   local NA_REGEXP="$NVIM_SOURCE_DIR/scripts/vim_na_regexp.txt"
   local NA_FILELIST="$NVIM_SOURCE_DIR/scripts/vim_na_files.txt"
+  local NA_CFUNC_LIST="$NVIM_SOURCE_DIR/scripts/vim_na_cfuncs.txt"
 
-  local FILES_REMAINING
+  local FILES_REMAINING C_FILES
   FILES_REMAINING="$(diff <(git -C "${VIM_SOURCE_DIR}" diff-tree --no-commit-id --name-only -r "$patch" | grep -v -f "$NA_REGEXP") "$NA_FILELIST" |
-    grep '^<')" || true
+    grep '^<' | sed 's/^< //')" || true
   test -z "$FILES_REMAINING" && return 0
-  if test "$FILES_REMAINING" == "$(printf "< src/version.c\n")"; then
-    local VERSION_LNUM
-    VERSION_LNUM=$(git -C "${VIM_SOURCE_DIR}" diff-tree --no-commit-id --numstat -r "$patch" -- src/version.c | grep -c '^2\s\+0')
-    test "$VERSION_LNUM" -ne 1 && return 1
-    local VERSION_VNUM
-    VERSION_VNUM="$(git -C "${VIM_SOURCE_DIR}" diff-tree --no-commit-id -U1 -r "$patch" -- src/version.c |
-      grep -Pzc '[ +]\/\*\*\/\n\+\s+[0-9]+,\n[ +]\/\*\*\/\n')" || true
-    test "$VERSION_VNUM" -eq 1 && return 0
-  fi
-  return 1
+
+  C_FILES=$(echo "$FILES_REMAINING" | grep '.*\.c$')
+  test "$FILES_REMAINING" != "$C_FILES" && return 1
+
+  local VERSION_LNUM VERSION_VNUM
+  for file in $C_FILES; do
+    if test "$file" == "src/version.c"; then
+      VERSION_LNUM=$(git -C "${VIM_SOURCE_DIR}" diff-tree --no-commit-id --numstat -r "$patch" -- src/version.c | grep -c '^2\s\+0')
+      test "$VERSION_LNUM" -ne 1 && return 1
+      VERSION_VNUM="$(git -C "${VIM_SOURCE_DIR}" diff-tree --no-commit-id -U1 -r "$patch" -- src/version.c |
+        grep -Pzc '[ +]\/\*\*\/\n\+\s+[0-9]+,\n[ +]\/\*\*\/\n')" || true
+      test "$VERSION_VNUM" -ne 1 && return 1
+    else
+      HUNKS=$(git -C "${VIM_SOURCE_DIR}" diff-tree --no-commit-id -U0  -r "$patch" -- "$file" | grep -P '^@@ .* @@')
+      if test -n "$HUNKS"; then
+        HUNK_NUM_FINAL=$(echo "$HUNKS" | sed 's/^@@ .* @@ \?//' | grep -cv -f "$NA_CFUNC_LIST")
+        test "$HUNK_NUM_FINAL" -ne 0 && return 1
+      fi
+    fi
+  done
+
+  return 0
 }
 
 list_na_patches() {
diff --git a/scripts/vim_na_cfuncs.txt b/scripts/vim_na_cfuncs.txt
new file mode 100644
index 0000000000..431da7bd68
--- /dev/null
+++ b/scripts/vim_na_cfuncs.txt
@@ -0,0 +1,39 @@
+^check_restricted(
+^did_set_cscopequickfix(
+^did_set_showtabpanel(
+^do_fixdel(
+^ex_behave(
+^ex_open(
+^ex_scriptversion(
+^ex_shell(
+^ex_smile(
+^ex_tearoff(
+^f_err_teapot(
+^f_listener_add(
+^f_redraw_listener_add(
+^f_test_alloc_fail(
+^f_test_autochdir(
+^f_test_feedinput(
+^f_test_garbagecollect_soon(
+^f_test_getvalue(
+^f_test_ignore_error(
+^f_test_null_channel(
+^f_test_null_job(
+^f_test_option_not_set(
+^f_test_override(
+^f_test_scrollbar(
+^f_test_setmouse(
+^f_test_settime(
+^f_test_srand_seed(
+^f_test_void(
+_balloon[a-zA-Z0-9_]\+(
+_tabpanelopt(
+bevalterm[a-zA-Z0-9_]\+(
+clip_xterm_[a-zA-Z0-9_]\+(
+crypt(
+crypt[a-zA-Z0-9_]\+(
+gui_mch_[a-zA-Z0-9_]\+(
+mch_kitty_probe(
+mzscheme_call_vim(
+text_prop[a-zA-Z0-9_]\+(
+x11_[a-zA-Z0-9_]\+(