build/bin/sage-bootstrap-python: Restore pwd checking - for WSL

Author: Matthias Koeppe

build/bin/sage-bootstrap-python

@@ -36,7 +36,9 @@ SAGE_ORIG_PATH=${NEW_PATH%%':'}
 # a defect of sage_bootstrap on macOS regarding SSL URLs.
 
 # Trac #30177: Also check for hashlib.sha1 to guard against broken python2
-# from old homebrew installations.
+# from old homebrew installations.  Also check whether the current directory
+# is accessible by this python; this is to guard on WSL against Pythons
+# installed somewhere else in Windows.
 
 # Trac #29285: Do not accept pythons that manipulate PATH, such as
 # the shims provided by pyenv.
@@ -58,7 +60,7 @@ PYTHONS="python python3 python3.12 python3.11 python3.10 python3.9 python3.8 pyt
 for PY in $PYTHONS; do
     PYTHON="$(PATH="$SAGE_ORIG_PATH" command -v $PY)"
     if [ -n "$PYTHON" ]; then
-        if CHECK_PATH="$PATH" "$PYTHON" -c "import argparse; import urllib; from hashlib import sha1; from ssl import HAS_SNI; assert HAS_SNI; from os import environ; assert environ[\"PATH\"] == environ[\"CHECK_PATH\"];" 2>/dev/null; then
+        if CHECK_PATH="$PATH" "$PYTHON" -c "import argparse; import urllib; from hashlib import sha1; from ssl import HAS_SNI; assert HAS_SNI; from os import listdir, environ; listdir(\"$(pwd)\"); assert environ[\"PATH\"] == environ[\"CHECK_PATH\"];" 2>/dev/null; then
             exec "$PYTHON" "$@"
         fi
     fi
@@ -67,7 +69,7 @@ done
 for PY in $PYTHONS; do
     PYTHON="$(PATH="$SAGE_ORIG_PATH" command -v $PY)"
     if [ -n "$PYTHON" ]; then
-        if CHECK_PATH="$PATH" "$PYTHON" -c "import argparse; import urllib; from hashlib import sha1; from os import environ; assert environ[\"PATH\"] == environ[\"CHECK_PATH\"];" 2>/dev/null; then
+        if CHECK_PATH="$PATH" "$PYTHON" -c "import argparse; import urllib; from hashlib import sha1; from os import listdir, environ; listdir(\"$(pwd)\"); assert environ[\"PATH\"] == environ[\"CHECK_PATH\"];" 2>/dev/null; then
             exec "$PYTHON" "$@"
         fi
     fi