1 files changed, 41 insertions, 0 deletions
diff --git a/src/backend/solverevdeps.py b/src/backend/solverevdeps.py
new file mode 100644
index 0000000..bd90e2f
--- /dev/null
+++ b/src/backend/solverevdeps.py
@@ -0,0 +1,41 @@
+#!/usr/bin/python3
+
+import animation
+import os
+import pickle
+import signal
+import subprocess
+import sys
+import sisyphus.getfs
+
+
+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)
+
+        pickle.dump(is_needed, open(os.path.join(
+            sisyphus.getfs.p_mtd_dir, "sisyphus_pkgrevdeps.pickle"), "wb"))
+    except KeyboardInterrupt:
+        p_exe.terminate()
+        try:
+            p_exe.wait(1)
+        except subprocess.TimeoutExpired:
+            p_exe.kill()
+        sys.exit()