From 7b1e5b4f41a9ca487678779d696e5b5f032c816f Mon Sep 17 00:00:00 2001
From: "James R. Barlow" <james@purplerock.ca>
Date: Mon, 26 Apr 2021 01:18:07 -0700
Subject: [PATCH] Fix "invalid version number" for untagged tesseract versions

Fixes #770
---
 src/ocrmypdf/_exec/tesseract.py | 1 +
 tests/test_validation.py        | 7 +++++++
 2 files changed, 8 insertions(+)

diff --git a/src/ocrmypdf/_exec/tesseract.py b/src/ocrmypdf/_exec/tesseract.py
index 5dc5024b..119771ec 100644
--- a/src/ocrmypdf/_exec/tesseract.py
+++ b/src/ocrmypdf/_exec/tesseract.py
@@ -61,6 +61,7 @@ class TesseractVersion(StrictVersion):
         ^(\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
+        (?:-(\d+)-g[0-9a-f]+)?  # untagged git version
         $
         ''',
         re.VERBOSE | re.ASCII,
diff --git a/tests/test_validation.py b/tests/test_validation.py
index 6bec04e3..fd4d6fc2 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: '4.1.1-rc2-25-g9707',
+        need_version='4.0.0',
+        version_parser=TesseractVersion,
+    )
     with pytest.raises(MissingDependencyError):
         vd.check_external_program(
             program="dummy_fails",