From bcffe825df2babdca7633347d01926e71423e3ff Mon Sep 17 00:00:00 2001
From: David Strobach <lalochcz@gmail.com>
Date: Fri, 5 Jun 2020 02:27:19 +0200
Subject: [PATCH] Add xontrib-pdb. Runs pdb on SIGUSR1.

---
 xonsh/xontribs.json |  5 +++++
 xontrib/pdb.py      | 14 ++++++++++++++
 2 files changed, 19 insertions(+)
 create mode 100644 xontrib/pdb.py

diff --git a/xonsh/xontribs.json b/xonsh/xontribs.json
index 43c42ef85..fec4c1985 100644
--- a/xonsh/xontribs.json
+++ b/xonsh/xontribs.json
@@ -164,6 +164,11 @@
   "description": ["Get identifiers, names, paths, URLs and words from the previous command output ",
                   "and use them for the next command."]
  },
+ {"name": "pdb",
+  "package": "xonsh",
+  "url": "http://xon.sh",
+  "description": ["Simple built-in debugger. Runs pdb on reception of SIGUSR1 signal."]
+ },
  {"name": "powerline",
   "package": "xontrib-powerline",
   "url": "https://github.com/santagada/xontrib-powerline",
diff --git a/xontrib/pdb.py b/xontrib/pdb.py
new file mode 100644
index 000000000..24f6de12e
--- /dev/null
+++ b/xontrib/pdb.py
@@ -0,0 +1,14 @@
+"""Simple built-in debugger. Runs pdb on reception of SIGUSR1 signal."""
+import signal
+
+__all__ = ()
+
+
+def handle_sigusr1(sig, frame):
+    print("\nSIGUSR1 signal received. Starting interactive debugger...", flush=True)
+    import pdb
+
+    pdb.Pdb().set_trace(frame)
+
+
+signal.signal(signal.SIGUSR1, handle_sigusr1)