Minimally fix CI

.github/workflows/actions.yml

@@ -20,9 +20,9 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
       - name: Set up Python ${{ env.default-python }}
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@v4
         with:
           python-version: ${{ env.default-python }}
       - name: Upgrade pip, Install nox
@@ -38,9 +38,9 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
       - name: Set up Python ${{ env.default-python }}
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@v4
         with:
           python-version: ${{ env.default-python }}
       - name: Upgrade pip, Install nox
@@ -75,20 +75,20 @@ jobs:
     strategy:
       matrix:
         os: [ ubuntu-latest ]
-        python-version: [ "3.6", "3.7", "3.8", "3.9", "3.10" ]
+        python-version: [ "3.8", "3.9", "3.10", "3.11" ] # should have 3.12 too!
     steps:
       - name: Checkout code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
       - name: Set up Python ${{ matrix.python-version }}
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@v4
         with:
           python-version: ${{ matrix.python-version }}
       - name: Determine pip cache directory
         id: pip-cache
         run: |
           echo "::set-output name=dir::$(pip cache dir)"
       - name: Cache pip cache
-        uses: actions/cache@v2
+        uses: actions/cache@v3
         with:
           path: ${{ steps.pip-cache.outputs.dir }}
           key: ${{ runner.os }}-pip${{ matrix.python-version }}
@@ -105,9 +105,9 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
       - name: Set up Python ${{ env.default-python }}
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@v4
         with:
           python-version: ${{ env.default-python }}
       - name: Upgrade pip and install nox
@@ -129,7 +129,7 @@ jobs:
       - build-docs
     steps:
       - name: Checkout code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
       - name: Install dependencies
         run: python -m pip install wheel
       - name: Set version
@@ -161,4 +161,4 @@ jobs:
           body_path: ${{ github.workspace }}-CHANGELOG.md
           files: |
             dist/*.tar.gz
-            dist/*.whl
+            dist/*.whl

CHANGELOG.md

@@ -5,6 +5,9 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
 ## [Unreleased]
 
+### Removed
+- Support for Python 3.6 and 3.7 ([#921](https://github.com/pdfminer/pdfminer.six/pull/921))
+
 ### Added
 
 - Output converter for the hOCR format ([#651](https://github.com/pdfminer/pdfminer.six/pull/651))
@@ -14,6 +17,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
 ### Fixed
 
+- Broken CI/CD pipeline by setting upper version limit for black, mypy, pip and setuptools ([#921](https://github.com/pdfminer/pdfminer.six/pull/921))
+- `flake8` failures ([#921](https://github.com/pdfminer/pdfminer.six/pull/921))
 - `ValueError` when bmp images with 1 bit channel are decoded ([#773](https://github.com/pdfminer/pdfminer.six/issues/773))
 - `ValueError` when trying to decrypt empty metadata values ([#766](https://github.com/pdfminer/pdfminer.six/issues/766))
 - Sphinx errors during building of documentation ([#760](https://github.com/pdfminer/pdfminer.six/pull/760))

README.md

@@ -39,7 +39,7 @@ Features
 How to use
 ----------
 
-* Install Python 3.6 or newer.
+* Install Python 3.8 or newer.
 * Install pdfminer.six.
 
   `pip install pdfminer.six`

noxfile.py

@@ -3,13 +3,13 @@
 import nox
 
 
-PYTHON_ALL_VERSIONS = ["3.6", "3.7", "3.8", "3.9", "3.10"]
+PYTHON_ALL_VERSIONS = ["3.8", "3.9", "3.10", "3.11"]  # should have 3.12
 PYTHON_MODULES = ["pdfminer", "tools", "tests", "noxfile.py", "setup.py"]
 
 
 @nox.session
 def format(session):
-    session.install("black")
+    session.install("black<23")
     # Format files locally with black, but only check in cicd
     if "CI" in os.environ:
         session.run("black", "--check", *PYTHON_MODULES)
@@ -25,7 +25,7 @@ def lint(session):
 
 @nox.session
 def types(session):
-    session.install("mypy")
+    session.install("mypy<1")
     session.run(
         "mypy",
         "--install-types",
@@ -37,12 +37,16 @@ def types(session):
 
 @nox.session(python=PYTHON_ALL_VERSIONS)
 def tests(session):
+    session.install("pip<23")
+    session.install("setuptools<58")
     session.install("-e", ".[dev]")
     session.run("pytest")
 
 
 @nox.session
 def docs(session):
+    session.install("pip<23")
+    session.install("setuptools<58")
     session.install("-e", ".[docs]")
     session.run(
         "python", "-m", "sphinx", "-b", "html", "docs/source", "docs/build/html"

pdfminer/image.py

@@ -8,7 +8,7 @@
     from typing import Literal
 except ImportError:
     # Literal was introduced in Python 3.8
-    from typing_extensions import Literal  # type: ignore[misc]
+    from typing_extensions import Literal  # type: ignore[assignment]
 
 from .jbig2 import JBIG2StreamReader, JBIG2StreamWriter
 from .layout import LTImage

tests/test_converter.py

@@ -173,7 +173,7 @@ def get_types(path):
         # they all have shape 'ml' not 'mlh'
         ml_pdf = extract_pages("samples/contrib/pr-00530-ml-lines.pdf")
         ml_pdf_page = list(ml_pdf)[0]
-        assert sum(type(item) == LTLine for item in ml_pdf_page) == 6
+        assert sum(type(item) is LTLine for item in ml_pdf_page) == 6
 
     def _get_analyzer(self):
         analyzer = PDFLayoutAnalyzer(None)