Drop support for Python 3.10, require Python 3.11+

Python 3.11 is now the minimum supported version. This aligns with
the codebase's use of StrEnum (introduced in 3.11) and removes
compatibility shims that were only needed for older versions.

.github/workflows/build.yml

@@ -22,11 +22,11 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-22.04, ubuntu-24.04]
-        python: ["3.10", "3.11", "3.12", "3.13", "3.14"]
+        python: ["3.11", "3.12", "3.13", "3.14"]
         include:
           - os: ubuntu-22.04
             tesseract_ppa: "ppa"
-            python: "3.10"
+            python: "3.11"
 
     env:
       OS: ${{ matrix.os }}
@@ -102,7 +102,7 @@ jobs:
     strategy:
       matrix:
         os: [macos-latest]
-        python: ["3.10", "3.11", "3.12", "3.13", "3.14"]
+        python: ["3.11", "3.12", "3.13", "3.14"]
 
     env:
       OS: ${{ matrix.os }}
@@ -165,7 +165,7 @@ jobs:
     strategy:
       matrix:
         os: [windows-latest]
-        python: ["3.10", "3.11", "3.12", "3.13", "3.14"]
+        python: ["3.11", "3.12", "3.13", "3.14"]
 
     env:
       OS: ${{ matrix.os }}

.readthedocs.yaml

@@ -15,7 +15,7 @@ sphinx:
 build:
   os: ubuntu-22.04
   tools:
-    python: "3.10"
+    python: "3.11"
 
 python:
   install:

docs/installation.md

@@ -487,7 +487,7 @@ You can then run OCRmyPDF in the Windows command prompt or Powershell, prefixing
 First install the the following prerequisite Cygwin packages using `setup-x86_64.exe`:
 
 ```
-python310 (or later)
+python311 (or later)
 python3?-devel
 python3?-pip
 python3?-lxml
@@ -606,7 +606,7 @@ and verapdf can validate speculative PDF/A conversion.
 
 The following versions are required:
 
-- Python 3.10 or newer
+- Python 3.11 or newer
 - Tesseract 4.1.1 or newer
 - One of: Ghostscript 9.54+ **or** pypdfium2 (Python package)
 - One of: Ghostscript 9.54+ **or** verapdf (for PDF/A output)
@@ -668,7 +668,7 @@ unfortunately, the `pip install` command cannot satisfy all of them.
 
 ## Installing HEAD revision from sources
 
-If you have `git` and Python 3.10 or newer installed, you can install
+If you have `git` and Python 3.11 or newer installed, you can install
 from source. When the `pip` installer runs, it will alert you if
 dependencies are missing.
 

pyproject.toml

@@ -10,7 +10,7 @@ dynamic = ["version"]
 description = "OCRmyPDF adds an OCR text layer to scanned PDF files, allowing them to be searched"
 readme = "README.md"
 license = "MPL-2.0"
-requires-python = ">=3.10"
+requires-python = ">=3.11"
 dependencies = [
   "deprecation>=2.1.0",
   "fpdf2>=2.8.0",
@@ -66,7 +66,7 @@ source = "vcs"
 version-file = "src/ocrmypdf/_version.py"
 
 [tool.distutils.bdist_wheel]
-python-tag = "py310"
+python-tag = "py311"
 
 [tool.coverage.run]
 branch = true
@@ -117,7 +117,7 @@ module = [
 ignore_missing_imports = true
 
 [tool.ruff]
-target-version = "py310"
+target-version = "py311"
 exclude = ["src/ocrmypdf/_version.py"] # Autogenerated
 
 [tool.ruff.lint]

snapcraft.yaml

@@ -5,7 +5,7 @@
 
 name: ocrmypdf
 title: OCRmyPDF
-base: core22
+base: core24
 version: git
 summary: OCRmyPDF adds a searchable text layer to scanned PDF files
 description: OCRmyPDF packaged for snap
@@ -14,12 +14,13 @@ confinement: strict
 icon: docs/images/logo-square-256.svg
 license: MPL-2.0
 
-architectures: [amd64]
+platforms:
+  amd64:
 
 environment:
-  TESSDATA_PREFIX: $SNAP/usr/share/tesseract-ocr/4.00/tessdata
-  GS_LIB: $SNAP/usr/share/ghostscript/9.55.0/Resource/Init
-  GS_FONTPATH: $SNAP/usr/share/ghostscript/9.55.0/Resource/Font
+  TESSDATA_PREFIX: $SNAP/usr/share/tesseract-ocr/5/tessdata
+  GS_LIB: $SNAP/usr/share/ghostscript/10.02.1/Resource/Init
+  GS_FONTPATH: $SNAP/usr/share/ghostscript/10.02.1/Resource/Font
   LD_LIBRARY_PATH: $SNAP/usr/lib/x86_64-linux-gnu
 
 apps:
@@ -84,11 +85,5 @@ parts:
       - wheel
 
     override-build: |
-      pip3 install --user dephell[full]
-      $HOME/.local/bin/dephell deps convert \
-          --from-path pyproject.toml \
-          --from-format pyproject \
-          --to-path setup.py \
-          --to-format setuppy
-      snapcraftctl build
-      ln -sf ../usr/lib/libsnapcraft-preload.so $SNAPCRAFT_PART_INSTALL/lib/libsnapcraft-preload.so
+      craftctl default
+      ln -sf ../usr/lib/libsnapcraft-preload.so $CRAFT_PART_INSTALL/lib/libsnapcraft-preload.so

src/ocrmypdf/builtin_plugins/concurrency.py

@@ -15,7 +15,6 @@ import threading
 from collections.abc import Callable, Iterable
 from concurrent.futures import ProcessPoolExecutor, ThreadPoolExecutor, as_completed
 from contextlib import suppress
-from typing import Union
 
 from rich.console import Console as RichConsole
 
@@ -25,10 +24,8 @@ from ocrmypdf._progressbar import RichProgressBar
 from ocrmypdf.exceptions import InputFileError
 from ocrmypdf.helpers import remove_all_log_handlers
 
-FuturesExecutorClass = Union[  # noqa: UP007
-    type[ThreadPoolExecutor], type[ProcessPoolExecutor]
-]
-Queue = Union[multiprocessing.Queue, queue.Queue]  # noqa: UP007
+FuturesExecutorClass = type[ThreadPoolExecutor] | type[ProcessPoolExecutor]
+Queue = multiprocessing.Queue | queue.Queue
 UserInit = Callable[[], None]
 WorkerInit = Callable[[Queue, UserInit, int], None]