From 7de146d4a03fac4adae8c2e10397ab61274e9611 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Gonzalo=20Tornar=C3=ADa?= <tornaria@cmat.edu.uy>
Date: Mon, 21 Feb 2022 10:52:16 -0300
Subject: [PATCH] python3-prompt_toolkit: restore sigint handlers

Fixes #35712

See also: https://github.com/prompt-toolkit/python-prompt-toolkit/issues/1576
---
 .../patches/restore-sigint-handler.patch      | 57 +++++++++++++++++++
 srcpkgs/python3-prompt_toolkit/template       |  2 +-
 2 files changed, 58 insertions(+), 1 deletion(-)
 create mode 100644 srcpkgs/python3-prompt_toolkit/patches/restore-sigint-handler.patch

diff --git a/srcpkgs/python3-prompt_toolkit/patches/restore-sigint-handler.patch b/srcpkgs/python3-prompt_toolkit/patches/restore-sigint-handler.patch
new file mode 100644
index 000000000000..9e0fbdbfe03f
--- /dev/null
+++ b/srcpkgs/python3-prompt_toolkit/patches/restore-sigint-handler.patch
@@ -0,0 +1,57 @@
+When setting a sigint handler, save and restore the previous handler,
+since add_signal_handler and remove_signal_handler don't.
+
+Use cysignals if available so that the os-level handlers (struct
+sigaction) are saved as well. If cysignals is not available, fallback
+to saving only the python handlers.
+
+See:
+ - https://github.com/void-linux/void-packages/issues/35712
+ - https://github.com/prompt-toolkit/python-prompt-toolkit/issues/1576
+ - https://trac.sagemath.org/ticket/33360#comment:3
+
+--- a/prompt_toolkit/application/application.py	2022-02-11 05:06:37.000000000 -0300
++++ b/prompt_toolkit/application/application.py	2022-02-22 15:31:02.248681343 -0300
+@@ -98,6 +98,10 @@
+ except ImportError:
+     import prompt_toolkit.eventloop.dummy_contextvars as contextvars  # type: ignore
+ 
++try:
++    from cysignals import pysignals
++except ImportError:
++    from . import dummy_pysignals as pysignals
+ 
+ __all__ = [
+     "Application",
+@@ -805,6 +809,9 @@
+                 loop = get_event_loop()
+ 
+                 if handle_sigint:
++                    # save sigint handlers
++                    _sigint = signal.getsignal(signal.SIGINT)
++                    _sigint_os = pysignals.getossignal(signal.SIGINT)
+                     loop.add_signal_handler(
+                         signal.SIGINT,
+                         lambda *_: loop.call_soon_threadsafe(
+@@ -843,6 +850,8 @@
+ 
+                     if handle_sigint:
+                         loop.remove_signal_handler(signal.SIGINT)
++                        # restore python and os-level signal handlers
++                        pysignals.setsignal(signal.SIGINT, _sigint, _sigint_os)
+ 
+                     # Reset slow_callback_duration.
+                     loop.slow_callback_duration = original_slow_callback_duration
+--- a/prompt_toolkit/application/dummy_pysignals.py	1969-12-31 21:00:00.000000000 -0300
++++ b/prompt_toolkit/application/dummy_pysignals.py	2022-02-22 15:31:26.432386296 -0300
+@@ -0,0 +1,10 @@
++# fallback in case cysignals is not available
++# these functions don't save the os level handlers
++
++import signal
++
++def getossignal(sig):
++    return None
++
++def setsignal(sig, action, osaction=None):
++    return signal.signal(sig, action)
diff --git a/srcpkgs/python3-prompt_toolkit/template b/srcpkgs/python3-prompt_toolkit/template
index 0d625dc249fa..26bcb33e82bc 100644
--- a/srcpkgs/python3-prompt_toolkit/template
+++ b/srcpkgs/python3-prompt_toolkit/template
@@ -1,7 +1,7 @@
 # Template file for 'python3-prompt_toolkit'
 pkgname=python3-prompt_toolkit
 version=3.0.28
-revision=1
+revision=2
 wrksrc="prompt_toolkit-${version}"
 build_style=python3-module
 hostmakedepends="python3-setuptools"