From 6f5b75bcd04040b262600f9eaff781f99aadb679 Mon Sep 17 00:00:00 2001
From: "James R. Barlow" <jim@purplerock.ca>
Date: Tue, 12 May 2020 02:23:56 -0700
Subject: [PATCH] Remove lru_cache on get_version

Does not play well with forking.
---
 src/ocrmypdf/exec/_support.py    | 1 +
 src/ocrmypdf/exec/ghostscript.py | 2 --
 src/ocrmypdf/exec/jbig2enc.py    | 2 --
 src/ocrmypdf/exec/pngquant.py    | 2 --
 src/ocrmypdf/exec/unpaper.py     | 2 --
 5 files changed, 1 insertion(+), 8 deletions(-)

diff --git a/src/ocrmypdf/exec/_support.py b/src/ocrmypdf/exec/_support.py
index bd8ed0e6..60d22a83 100644
--- a/src/ocrmypdf/exec/_support.py
+++ b/src/ocrmypdf/exec/_support.py
@@ -25,6 +25,7 @@ import sys
 from collections.abc import Mapping
 from contextlib import suppress
 from distutils.version import LooseVersion
+from functools import lru_cache
 from subprocess import PIPE, STDOUT, CalledProcessError
 from subprocess import run as subprocess_run
 
diff --git a/src/ocrmypdf/exec/ghostscript.py b/src/ocrmypdf/exec/ghostscript.py
index b58e30cb..d7407726 100644
--- a/src/ocrmypdf/exec/ghostscript.py
+++ b/src/ocrmypdf/exec/ghostscript.py
@@ -21,7 +21,6 @@ import logging
 import os
 import re
 import warnings
-from functools import lru_cache
 from io import BytesIO
 from os import fspath
 from pathlib import Path
@@ -57,7 +56,6 @@ if os.name == 'nt':
     GS = Path(GS).stem
 
 
-@lru_cache(maxsize=1)
 def version():
     return get_version(GS)
 
diff --git a/src/ocrmypdf/exec/jbig2enc.py b/src/ocrmypdf/exec/jbig2enc.py
index 979b8eb7..c027e28d 100644
--- a/src/ocrmypdf/exec/jbig2enc.py
+++ b/src/ocrmypdf/exec/jbig2enc.py
@@ -17,14 +17,12 @@
 
 """Interface to jbig2 executable"""
 
-from functools import lru_cache
 from subprocess import PIPE
 
 from ocrmypdf.exceptions import MissingDependencyError
 from ocrmypdf.exec import get_version, run
 
 
-@lru_cache(maxsize=1)
 def version():
     return get_version('jbig2', regex=r'jbig2enc (\d+(\.\d+)*).*')
 
diff --git a/src/ocrmypdf/exec/pngquant.py b/src/ocrmypdf/exec/pngquant.py
index f99fd421..ad00560f 100644
--- a/src/ocrmypdf/exec/pngquant.py
+++ b/src/ocrmypdf/exec/pngquant.py
@@ -17,7 +17,6 @@
 
 """Interface to pngquant executable"""
 
-from functools import lru_cache
 from subprocess import run
 from tempfile import NamedTemporaryFile
 
@@ -27,7 +26,6 @@ from ocrmypdf.exceptions import MissingDependencyError
 from ocrmypdf.exec import get_version
 
 
-@lru_cache(maxsize=1)
 def version():
     return get_version('pngquant', regex=r'(\d+(\.\d+)*).*')
 
diff --git a/src/ocrmypdf/exec/unpaper.py b/src/ocrmypdf/exec/unpaper.py
index 2f77701b..a1aa749e 100644
--- a/src/ocrmypdf/exec/unpaper.py
+++ b/src/ocrmypdf/exec/unpaper.py
@@ -23,7 +23,6 @@
 import logging
 import os
 import shlex
-from functools import lru_cache
 from pathlib import Path
 from subprocess import PIPE, STDOUT, CalledProcessError
 from tempfile import TemporaryDirectory
@@ -37,7 +36,6 @@ from ocrmypdf.exec import run as external_run
 log = logging.getLogger(__name__)
 
 
-@lru_cache(maxsize=1)
 def version():
     return get_version('unpaper')