sage.env, sage.misc.package: Use SAGE_LOCAL_SPKG_INST to avoid clash …

…with SAGE_SPKG_INST set by sage-spkg

src/bin/sage-env

@@ -228,7 +228,7 @@ fi
 # depending on SAGE_ROOT and SAGE_LOCAL which are already defined.
 if [ -n "$SAGE_LOCAL" ]; then
     export SAGE_SHARE="$SAGE_LOCAL/share"
-    export SAGE_SPKG_INST="$SAGE_LOCAL/var/lib/sage/installed"
+    export SAGE_SPKG_INST="$SAGE_LOCAL/var/lib/sage/installed"  # deprecated
 fi
 if [ -n "$SAGE_SHARE" ]; then
     export SAGE_DOC="$SAGE_SHARE/doc/sage"

src/sage/env.py

@@ -177,7 +177,8 @@ def var(key: str, *fallbacks: Optional[str], force: bool = False) -> Optional[st
 SAGE_LOCAL = var("SAGE_LOCAL", SAGE_VENV)
 SAGE_SHARE = var("SAGE_SHARE", join(SAGE_LOCAL, "share"))
 SAGE_DOC = var("SAGE_DOC", join(SAGE_SHARE, "doc", "sage"))
-SAGE_SPKG_INST = var("SAGE_SPKG_INST", join(SAGE_LOCAL, "var", "lib", "sage", "installed"))
+SAGE_LOCAL_SPKG_INST = var("SAGE_LOCAL_SPKG_INST", join(SAGE_LOCAL, "var", "lib", "sage", "installed"))
+SAGE_SPKG_INST = var("SAGE_SPKG_INST", join(SAGE_LOCAL, "var", "lib", "sage", "installed"))  # deprecated
 
 # source tree of the Sage distribution
 SAGE_ROOT = var("SAGE_ROOT")  # no fallback for SAGE_ROOT

src/sage/misc/package.py

@@ -390,7 +390,7 @@ def _spkg_inst_dirs():
     """
     Generator for the installation manifest directories as resolved paths.
 
-    It yields first ``SAGE_SPKG_INST``, then ``SAGE_VENV_SPKG_INST``,
+    It yields first ``SAGE_LOCAL_SPKG_INST``, then ``SAGE_VENV_SPKG_INST``,
     if defined; but it both resolve to the same directory, it only yields
     one element.
 
@@ -402,7 +402,7 @@ def _spkg_inst_dirs():
 
     """
     last_inst_dir = None
-    for inst_dir in (sage.env.SAGE_SPKG_INST, sage.env.SAGE_VENV_SPKG_INST):
+    for inst_dir in (sage.env.SAGE_LOCAL_SPKG_INST, sage.env.SAGE_VENV_SPKG_INST):
         if inst_dir:
             inst_dir = Path(inst_dir).resolve()
             if inst_dir.is_dir() and inst_dir != last_inst_dir: