don't silently fail while attempting to uninstall a package with reverse dependenciesv6.2401.0

4 files changed, 92 insertions, 19 deletions

diff --git a/src/backend/__init__.py b/src/backend/__init__.py
index 9c38585..d6dc4c7 100644
--- a/src/backend/__init__.py
+++ b/src/backend/__init__.py
@@ -10,7 +10,8 @@ from .mirrors import *
 from .purgeenv import *
 from .recoverdb import *
 from .solvedeps import *
-from .search import *
+from .solverdeps import *
+from .searchdb import *
 from .setbranch import *
 from .setjobs import *
 from .setprofile import *
diff --git a/src/backend/search.py b/src/backend/searchdb.py
index 22bd4ba..22bd4ba 100644
--- a/src/backend/search.py
+++ b/src/backend/searchdb.py
diff --git a/src/backend/solverdeps.py b/src/backend/solverdeps.py
new file mode 100644
index 0000000..b866cc8
--- /dev/null
+++ b/src/backend/solverdeps.py
@@ -0,0 +1,37 @@
+#!/usr/bin/python3
+
+import animation
+import signal
+import subprocess
+import sys
+
+
+def sigint_handler(signal, frame):
+    sys.exit(0)
+
+
+signal.signal(signal.SIGINT, sigint_handler)
+
+
+@animation.wait('resolving reverse dependencies')
+def start(pkgname=None):
+    is_needed = int(0)
+
+    p_exe = subprocess.Popen(
+        ['emerge', '--depclean', '--quiet', '--pretend', '--verbose'] + list(pkgname), stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+
+    try:
+        stdout, stderr = p_exe.communicate()
+
+        for p_out in stdout.decode('utf-8').splitlines():
+            if any(key in p_out for key in ["pulled in by:", "required"]):
+                is_needed = int(1)
+
+    except KeyboardInterrupt:
+        p_exe.terminate()
+        try:
+            p_exe.wait(1)
+        except subprocess.TimeoutExpired:
+            p_exe.kill()
+        sys.exit()
+    return is_needed
diff --git a/src/backend/uninstall.py b/src/backend/uninstall.py
index 70150f9..ede3947 100644
--- a/src/backend/uninstall.py
+++ b/src/backend/uninstall.py
@@ -8,6 +8,7 @@ import sys
 import sisyphus.checkenv
 import sisyphus.getcolor
 import sisyphus.killemerge
+import sisyphus.solverdeps
 import sisyphus.syncdb
 
 
@@ -25,24 +26,16 @@ def start(pkgname, depclean=False, gfx_ui=False, unmerge=False):
         print(sisyphus.getcolor.bright_red +
               "\nYou need root permissions to do this!\n" + sisyphus.getcolor.reset)
         sys.exit()
+    else:
+        if gfx_ui:
+            is_needed = sisyphus.solverdeps.start.__wrapped__(pkgname)
+        else:
+            is_needed = sisyphus.solverdeps.start(pkgname)
 
-    if unmerge:
-        p_exe = subprocess.Popen(
-            ['emerge', '--quiet', '--unmerge', '--ask'] + list(pkgname))
-        try:
-            p_exe.wait()
-            sisyphus.syncdb.lcl_tbl()
-        except KeyboardInterrupt:
-            p_exe.terminate()
-            try:
-                p_exe.wait(1)
-            except subprocess.TimeoutExpired:
-                p_exe.kill()
-            sys.exit()
-    elif depclean:
+    if is_needed != 0:
         if gfx_ui:
-            p_exe = subprocess.Popen(
-                ['emerge'] + args + pkgname, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+            p_exe = subprocess.Popen(['emerge'] + args + ['--pretend', '--verbose'] + list(
+                pkgname), stdout=subprocess.PIPE, stderr=subprocess.PIPE)
             # kill portage if the program dies or it's terminated by the user
             atexit.register(sisyphus.killemerge.start, p_exe)
 
@@ -50,10 +43,27 @@ def start(pkgname, depclean=False, gfx_ui=False, unmerge=False):
                 print(p_out.rstrip())
 
             p_exe.wait()
-            sisyphus.syncdb.lcl_tbl()
+            print("\nWon't uninstall! Other packages depend on " + str(pkgname))
         else:
             p_exe = subprocess.Popen(
-                ['emerge'] + args + ['--ask'] + list(pkgname))
+                ['emerge'] + args + ['--pretend', '--verbose'] + list(pkgname))
+            try:
+                p_exe.wait()
+            except KeyboardInterrupt:
+                p_exe.terminate()
+                try:
+                    p_exe.wait(1)
+                except subprocess.TimeoutExpired:
+                    p_exe.kill()
+                sys.exit()
+            print(sisyphus.getcolor.bright_red +
+                  "\nWon't uninstall! Other packages depend on " + sisyphus.getcolor.reset + str(pkgname))
+            print(sisyphus.getcolor.bright_red + "Use the " + sisyphus.getcolor.reset + sisyphus.getcolor.green + "'--force'" +
+                  sisyphus.getcolor.reset + sisyphus.getcolor.bright_red + " option to override at your own risk!\n" + sisyphus.getcolor.reset)
+    else:
+        if unmerge:
+            p_exe = subprocess.Popen(
+                ['emerge', '--quiet', '--unmerge', '--ask'] + list(pkgname))
             try:
                 p_exe.wait()
                 sisyphus.syncdb.lcl_tbl()
@@ -64,3 +74,28 @@ def start(pkgname, depclean=False, gfx_ui=False, unmerge=False):
                 except subprocess.TimeoutExpired:
                     p_exe.kill()
                 sys.exit()
+        elif depclean:
+            if gfx_ui:
+                p_exe = subprocess.Popen(
+                    ['emerge'] + args + pkgname, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+                # kill portage if the program dies or it's terminated by the user
+                atexit.register(sisyphus.killemerge.start, p_exe)
+
+                for p_out in io.TextIOWrapper(p_exe.stdout, encoding="utf-8"):
+                    print(p_out.rstrip())
+
+                p_exe.wait()
+                sisyphus.syncdb.lcl_tbl()
+            else:
+                p_exe = subprocess.Popen(
+                    ['emerge'] + args + ['--ask'] + list(pkgname))
+                try:
+                    p_exe.wait()
+                    sisyphus.syncdb.lcl_tbl()
+                except KeyboardInterrupt:
+                    p_exe.terminate()
+                    try:
+                        p_exe.wait(1)
+                    except subprocess.TimeoutExpired:
+                        p_exe.kill()
+                    sys.exit()