Add warning to makepkg-mingw if mingw-w64-file/grep/sed are installed

Author: Cyril Arnould

pacman/PKGBUILD

@@ -4,7 +4,7 @@
 
 pkgname=pacman
 pkgver=6.0.2
-pkgrel=6
+pkgrel=7
 pkgdesc="A library-based package manager with dependency support (MSYS2 port)"
 arch=('i686' 'x86_64')
 url="https://www.archlinux.org/pacman/"
@@ -79,7 +79,7 @@ sha256sums=('SKIP'
             '53c0c2d42bc10f265aa41bc412a6ebc2d98177d9356b0fa9a2a130caec46ac2d'
             'c12da01ede663a4924d0817a0d1bd6082b1380383cfb74cc1cea08f9d73e4902'
             '8cb6b244d39107afc6cff74d919708ffc58b903c42f82d050d1d49bbf31208ab'
-            '98198e1f0f252eae0560d271bee4b9149e127399dd0d3fd5d8d24579d9e0550f'
+            '6faceffbf98ef704ebd6b28399c9ad0c029a85164878bf2d0c2f6e7a8e5e13e9'
             'd272176dea508bf0972dde6396ca655e900d509099d0a496bd6a138f98bb48df'
             '7e2a2fc6799ed8a9dbc8b0712b162be963ed22351e4cb29b3a4d4a4d3f28d7ed'
             '953b66200dbe4f5b3a9caac2ce25f1ded7918232dce2e61b4bf64f5d87892d07'

pacman/makepkg-mingw

@@ -106,6 +106,31 @@ fi
 print_msg1 "MINGW_ARCH: ${MINGW_ARCH}"
 
 for _mingw in ${MINGW_ARCH}; do
+  # Check if problematic packages are installed
+  case $_mingw in
+    'mingw32')
+      MINGW_PACKAGE_PREFIX='mingw-w64-i686';;
+    'mingw64')
+      MINGW_PACKAGE_PREFIX='mingw-w64-x86_64';;
+    'clang32')
+      MINGW_PACKAGE_PREFIX='mingw-w64-clang-i686';;
+    'clang64')
+      MINGW_PACKAGE_PREFIX='mingw-w64-clang-x86_64';;
+    'clangarm64')
+      MINGW_PACKAGE_PREFIX='mingw-w64-clang-aarch64';;
+    'ucrt64')
+      MINGW_PACKAGE_PREFIX='mingw-w64-ucrt-x86_64';;
+  esac
+  if test -f "/${_mingw}/bin/file.exe"; then
+    print_warning "${MINGW_PACKAGE_PREFIX}-file is installed, which is known to cause issues in package builds."
+  fi
+  if test -f "/${_mingw}/bin/grep.exe"; then
+    print_warning "${MINGW_PACKAGE_PREFIX}-grep is installed, which is known to cause issues in package builds."
+  fi
+  if test -f "/${_mingw}/bin/sed.exe"; then
+    print_warning "${MINGW_PACKAGE_PREFIX}-sed is installed, which is known to cause issues in package builds."
+  fi
+
   print_msg2 "Building ${_mingw}..."
 
   MSYSTEM="${_mingw^^}" \