From 5f01c5e330ce8e0249ff167ae4f79fbb648b05c6 Mon Sep 17 00:00:00 2001
From: "James R. Barlow" <james@purplerock.ca>
Date: Wed, 16 Jun 2021 00:08:56 -0700
Subject: [PATCH] Fix another species of Tesseract version number breaking
 regex

Fixes #795
---
 src/ocrmypdf/_exec/tesseract.py | 3 ++-
 tests/test_validation.py        | 7 +++++++
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/src/ocrmypdf/_exec/tesseract.py b/src/ocrmypdf/_exec/tesseract.py
index 119771ec..ac7b4fab 100644
--- a/src/ocrmypdf/_exec/tesseract.py
+++ b/src/ocrmypdf/_exec/tesseract.py
@@ -56,11 +56,12 @@ class TesseractLoggerAdapter(logging.LoggerAdapter):
 
 
 class TesseractVersion(StrictVersion):
+
     version_re = re.compile(
         r'''
         ^(\d+) \. (\d+) (\. (\d+))?  # groups: 1/major, 2/minor, 3/[skip], 4/patch
         [-]?  # optional hyphen separator
-        (?:(alpha|beta|rc|dev)[.\-\ ]?(\d+)?)?  # 5/prerelease, 6/prerelease_num
+        (?:(alpha|beta|rc|dev)?[.\-\ ]?(\d+)?)?  # 5/prerelease, 6/prerelease_num
         (?:-(\d+)-g[0-9a-f]+)?  # untagged git version
         $
         ''',
diff --git a/tests/test_validation.py b/tests/test_validation.py
index fd4d6fc2..a027e17a 100644
--- a/tests/test_validation.py
+++ b/tests/test_validation.py
@@ -237,6 +237,13 @@ def test_version_comparison():
         need_version='4.0.0',
         version_parser=TesseractVersion,
     )
+    vd.check_external_program(
+        program="tesseract",
+        package="tesseract",
+        version_checker=lambda: 'v4.0.0.20181030',  # Some Windows builds use this format
+        need_version='4.0.0',
+        version_parser=TesseractVersion,
+    )
     vd.check_external_program(
         program="tesseract",
         package="tesseract",