Bug #357009: Disallow uninstallation of currently used Python interpreter.

diff --git a/pym/_emerge/unmerge.py b/pym/_emerge/unmerge.py
index df95f699affe54ad4102067bf7b1d22920d4a089..a6a330cd338d4ef51282e38b35ee0a50f56ab086 100644 (file)
--- a/pym/_emerge/unmerge.py
+++ b/pym/_emerge/unmerge.py
@@ -7,6 +7,7 @@ import logging
 import sys
 import textwrap
 import portage
+import portage.dbapi.vartree
 from portage import os
 from portage.output import bold, colorize, darkgreen, green
 from portage._sets import SETPREFIX
@@ -314,19 +315,26 @@ def unmerge(root_config, myopts, unmerge_action,
                                # by a concurrent process.
                                continue
 
-                       if unmerge_action != "clean" and \
-                               root_config.root == "/" and \
-                               portage.match_from_list(
-                               portage.const.PORTAGE_PACKAGE_ATOM, [pkg]):
-                               msg = ("Not unmerging package %s since there is no valid " + \
-                               "reason for portage to unmerge itself.") % (pkg.cpv,)
-                               for line in textwrap.wrap(msg, 75):
-                                       out.eerror(line)
-                               # adjust pkgmap so the display output is correct
-                               pkgmap[cp]["selected"].remove(cpv)
-                               all_selected.remove(cpv)
-                               pkgmap[cp]["protected"].add(cpv)
-                               continue
+                       if unmerge_action != "clean" and root_config.root == "/":
+                               skip_pkg = False
+                               if portage.match_from_list(portage.const.PORTAGE_PACKAGE_ATOM, [pkg]):
+                                       msg = ("Not unmerging package %s since there is no valid reason "
+                                               "for Portage to unmerge itself.") % (pkg.cpv,)
+                                       skip_pkg = True
+                               elif portage.dbapi.vartree.dblink(pkg.category, pkg.pf,
+                                       settings=settings, treetype="vartree", vartree=vartree,
+                                       scheduler=scheduler).isowner(portage._python_interpreter):
+                                       msg = ("Not unmerging package %s since there is no valid reason "
+                                               "for Portage to unmerge currently used Python interpreter.") % (pkg.cpv,)
+                                       skip_pkg = True
+                               if skip_pkg:
+                                       for line in textwrap.wrap(msg, 75):
+                                               out.eerror(line)
+                                       # adjust pkgmap so the display output is correct
+                                       pkgmap[cp]["selected"].remove(cpv)
+                                       all_selected.remove(cpv)
+                                       pkgmap[cp]["protected"].add(cpv)
+                                       continue
 
                        parents = []
                        for s in installed_sets: