From f5992d2a4028f8a5cd681ebbec48d57a058b7697 Mon Sep 17 00:00:00 2001
From: Eliah Kagan <degeneracypressure@gmail.com>
Date: Fri, 26 Jan 2024 07:09:04 -0500
Subject: [PATCH 01/29] Try not installing/upgrading wheel for Cygwin CI

This is for a recent problem where "pip install -U" in the virtual
environment in a Cygwin test job seems to block indefinitely on
downloading the wheel package itself (not other packages' wheels).
---
 .github/workflows/cygwin-test.yml | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/.github/workflows/cygwin-test.yml b/.github/workflows/cygwin-test.yml
index f3937d21e..477572afc 100644
--- a/.github/workflows/cygwin-test.yml
+++ b/.github/workflows/cygwin-test.yml
@@ -62,8 +62,8 @@ jobs:
 
     - name: Update PyPA packages
       run: |
-        # Get the latest pip, wheel, and prior to Python 3.12, setuptools.
-        python -m pip install -U pip $(pip freeze --all | grep -ow ^setuptools) wheel
+        # Get the latest pip, and prior to Python 3.12, setuptools.
+        python -m pip install -U pip $(pip freeze --all | grep -ow ^setuptools)
 
     - name: Install project and test dependencies
       run: |

From ace9eead91aa851efea9b7f28ee37ad5638600ed Mon Sep 17 00:00:00 2001
From: Eliah Kagan <degeneracypressure@gmail.com>
Date: Fri, 26 Jan 2024 07:23:45 -0500
Subject: [PATCH 02/29] Try not upgrading/installing pip/setuptools either on
 Cygwin

---
 .github/workflows/cygwin-test.yml | 5 -----
 1 file changed, 5 deletions(-)

diff --git a/.github/workflows/cygwin-test.yml b/.github/workflows/cygwin-test.yml
index 477572afc..d61aad79e 100644
--- a/.github/workflows/cygwin-test.yml
+++ b/.github/workflows/cygwin-test.yml
@@ -60,11 +60,6 @@ jobs:
         # This is used unless, and before, an updated pip is installed.
         ln -s pip3 /usr/bin/pip
 
-    - name: Update PyPA packages
-      run: |
-        # Get the latest pip, and prior to Python 3.12, setuptools.
-        python -m pip install -U pip $(pip freeze --all | grep -ow ^setuptools)
-
     - name: Install project and test dependencies
       run: |
         pip install ".[test]"

From 92d1e48d9f4268725f1c140e9fd98e3029961729 Mon Sep 17 00:00:00 2001
From: Eliah Kagan <degeneracypressure@gmail.com>
Date: Fri, 26 Jan 2024 07:37:56 -0500
Subject: [PATCH 03/29] Try installing pytho39-wheel Cygwin package

Maybe this will overcome the next blockage, which is the codecov
PyPI package, downloading a .tar.gz file.
---
 .github/workflows/cygwin-test.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/workflows/cygwin-test.yml b/.github/workflows/cygwin-test.yml
index d61aad79e..eee795f96 100644
--- a/.github/workflows/cygwin-test.yml
+++ b/.github/workflows/cygwin-test.yml
@@ -30,7 +30,7 @@ jobs:
     - name: Install Cygwin
       uses: cygwin/cygwin-install-action@v4
       with:
-        packages: python39 python39-pip python39-virtualenv git
+        packages: python39 python39-pip python39-virtualenv python39-wheel git
         add-to-path: false  # No need to change $PATH outside the Cygwin environment.
 
     - name: Arrange for verbose output

From fce86d9390056635f6b1a9d5b308c462d7c87f7f Mon Sep 17 00:00:00 2001
From: Eliah Kagan <degeneracypressure@gmail.com>
Date: Fri, 26 Jan 2024 07:45:42 -0500
Subject: [PATCH 04/29] Try upgrading wheel, but after upgrading pip

---
 .github/workflows/cygwin-test.yml | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/.github/workflows/cygwin-test.yml b/.github/workflows/cygwin-test.yml
index eee795f96..b543c6873 100644
--- a/.github/workflows/cygwin-test.yml
+++ b/.github/workflows/cygwin-test.yml
@@ -60,6 +60,12 @@ jobs:
         # This is used unless, and before, an updated pip is installed.
         ln -s pip3 /usr/bin/pip
 
+    - name: Update PyPA packages
+      run: |
+        # Get the latest pip, wheel, and prior to Python 3.12, setuptools.
+        python -m pip install -U pip $(pip freeze --all | grep -ow ^setuptools)
+        python -m pip install -U wheel
+
     - name: Install project and test dependencies
       run: |
         pip install ".[test]"

From 5559caaf8b3cdf818ff6def95e88a2dc56883f34 Mon Sep 17 00:00:00 2001
From: Eliah Kagan <degeneracypressure@gmail.com>
Date: Fri, 26 Jan 2024 08:08:49 -0500
Subject: [PATCH 05/29] Try always running pip on Cygwin as "python -m pip"

---
 .github/workflows/cygwin-test.yml | 10 ++--------
 1 file changed, 2 insertions(+), 8 deletions(-)

diff --git a/.github/workflows/cygwin-test.yml b/.github/workflows/cygwin-test.yml
index b543c6873..9bf452c82 100644
--- a/.github/workflows/cygwin-test.yml
+++ b/.github/workflows/cygwin-test.yml
@@ -55,20 +55,14 @@ jobs:
         # and cause subsequent tests to fail
         cat test/fixtures/.gitconfig >> ~/.gitconfig
 
-    - name: Ensure the "pip" command is available
-      run: |
-        # This is used unless, and before, an updated pip is installed.
-        ln -s pip3 /usr/bin/pip
-
     - name: Update PyPA packages
       run: |
         # Get the latest pip, wheel, and prior to Python 3.12, setuptools.
-        python -m pip install -U pip $(pip freeze --all | grep -ow ^setuptools)
-        python -m pip install -U wheel
+        python -m pip install -U pip $(pip freeze --all | grep -ow ^setuptools) wheel
 
     - name: Install project and test dependencies
       run: |
-        pip install ".[test]"
+        python -m pip install ".[test]"
 
     - name: Show version and platform information
       run: |

From 1b69cf0b3ba7f7d638a6e23da12920dde9d50ad7 Mon Sep 17 00:00:00 2001
From: Eliah Kagan <degeneracypressure@gmail.com>
Date: Fri, 26 Jan 2024 08:14:45 -0500
Subject: [PATCH 06/29] Try using a venv on Cygwin

---
 .github/workflows/cygwin-test.yml | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/.github/workflows/cygwin-test.yml b/.github/workflows/cygwin-test.yml
index 9bf452c82..685856f7f 100644
--- a/.github/workflows/cygwin-test.yml
+++ b/.github/workflows/cygwin-test.yml
@@ -55,17 +55,24 @@ jobs:
         # and cause subsequent tests to fail
         cat test/fixtures/.gitconfig >> ~/.gitconfig
 
+    - name: Create virtual environment
+      run: |
+        python -m venv .venv
+
     - name: Update PyPA packages
       run: |
         # Get the latest pip, wheel, and prior to Python 3.12, setuptools.
+        . .venv/bin/activate
         python -m pip install -U pip $(pip freeze --all | grep -ow ^setuptools) wheel
 
     - name: Install project and test dependencies
       run: |
+        . .venv/bin/activate
         python -m pip install ".[test]"
 
     - name: Show version and platform information
       run: |
+        . .venv/bin/activate
         uname -a
         command -v git python
         git version
@@ -74,4 +81,5 @@ jobs:
 
     - name: Test with pytest
       run: |
+        . .venv/bin/activate
         pytest --color=yes -p no:sugar --instafail -vv

From 6faa376c6002f11e18c053a9c0f8f08ab3733fb4 Mon Sep 17 00:00:00 2001
From: Eliah Kagan <degeneracypressure@gmail.com>
Date: Fri, 26 Jan 2024 08:24:26 -0500
Subject: [PATCH 07/29] Use "python -v -m pip" to see some of what's going on

---
 .github/workflows/cygwin-test.yml | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/.github/workflows/cygwin-test.yml b/.github/workflows/cygwin-test.yml
index 685856f7f..1a0654a52 100644
--- a/.github/workflows/cygwin-test.yml
+++ b/.github/workflows/cygwin-test.yml
@@ -63,12 +63,12 @@ jobs:
       run: |
         # Get the latest pip, wheel, and prior to Python 3.12, setuptools.
         . .venv/bin/activate
-        python -m pip install -U pip $(pip freeze --all | grep -ow ^setuptools) wheel
+        python -v -m pip -v install -U pip $(pip freeze --all | grep -ow ^setuptools) wheel
 
     - name: Install project and test dependencies
       run: |
         . .venv/bin/activate
-        python -m pip install ".[test]"
+        python -v -m pip install ".[test]"
 
     - name: Show version and platform information
       run: |

From 1837c53043717f08a90ecef1f2bdb5fd53ceb059 Mon Sep 17 00:00:00 2001
From: Eliah Kagan <degeneracypressure@gmail.com>
Date: Fri, 26 Jan 2024 17:37:16 -0500
Subject: [PATCH 08/29] Undo venv; use "python -m pip -vvv" to see what's going
 on

---
 .github/workflows/cygwin-test.yml | 12 ++----------
 1 file changed, 2 insertions(+), 10 deletions(-)

diff --git a/.github/workflows/cygwin-test.yml b/.github/workflows/cygwin-test.yml
index 1a0654a52..b9483817e 100644
--- a/.github/workflows/cygwin-test.yml
+++ b/.github/workflows/cygwin-test.yml
@@ -55,24 +55,17 @@ jobs:
         # and cause subsequent tests to fail
         cat test/fixtures/.gitconfig >> ~/.gitconfig
 
-    - name: Create virtual environment
-      run: |
-        python -m venv .venv
-
     - name: Update PyPA packages
       run: |
         # Get the latest pip, wheel, and prior to Python 3.12, setuptools.
-        . .venv/bin/activate
-        python -v -m pip -v install -U pip $(pip freeze --all | grep -ow ^setuptools) wheel
+        python -m pip -vvv install -U pip $(pip freeze --all | grep -ow ^setuptools) wheel
 
     - name: Install project and test dependencies
       run: |
-        . .venv/bin/activate
-        python -v -m pip install ".[test]"
+        python -m pip -vvv install ".[test]"
 
     - name: Show version and platform information
       run: |
-        . .venv/bin/activate
         uname -a
         command -v git python
         git version
@@ -81,5 +74,4 @@ jobs:
 
     - name: Test with pytest
       run: |
-        . .venv/bin/activate
         pytest --color=yes -p no:sugar --instafail -vv

From 0c1cfbf0fff0a4429db75e53a214dfc88fb7c0ec Mon Sep 17 00:00:00 2001
From: Eliah Kagan <degeneracypressure@gmail.com>
Date: Fri, 26 Jan 2024 17:42:59 -0500
Subject: [PATCH 09/29] Undo all debugging changes except passing "-vvv"

---
 .github/workflows/cygwin-test.yml | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/.github/workflows/cygwin-test.yml b/.github/workflows/cygwin-test.yml
index b9483817e..9cd34788e 100644
--- a/.github/workflows/cygwin-test.yml
+++ b/.github/workflows/cygwin-test.yml
@@ -30,7 +30,7 @@ jobs:
     - name: Install Cygwin
       uses: cygwin/cygwin-install-action@v4
       with:
-        packages: python39 python39-pip python39-virtualenv python39-wheel git
+        packages: python39 python39-pip python39-virtualenv git
         add-to-path: false  # No need to change $PATH outside the Cygwin environment.
 
     - name: Arrange for verbose output
@@ -55,6 +55,11 @@ jobs:
         # and cause subsequent tests to fail
         cat test/fixtures/.gitconfig >> ~/.gitconfig
 
+    - name: Ensure the "pip" command is available
+      run: |
+        # This is used unless, and before, an updated pip is installed.
+        ln -s pip3 /usr/bin/pip
+
     - name: Update PyPA packages
       run: |
         # Get the latest pip, wheel, and prior to Python 3.12, setuptools.
@@ -62,7 +67,7 @@ jobs:
 
     - name: Install project and test dependencies
       run: |
-        python -m pip -vvv install ".[test]"
+        pip install -vvv ".[test]"
 
     - name: Show version and platform information
       run: |

From 6f36edd6d96f9ab90db04b8f2c2ce2e299def26d Mon Sep 17 00:00:00 2001
From: Eliah Kagan <degeneracypressure@gmail.com>
Date: Fri, 26 Jan 2024 17:48:34 -0500
Subject: [PATCH 10/29] Try with "--no-cache-dir"

---
 .github/workflows/cygwin-test.yml | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/.github/workflows/cygwin-test.yml b/.github/workflows/cygwin-test.yml
index 9cd34788e..350d7b4c9 100644
--- a/.github/workflows/cygwin-test.yml
+++ b/.github/workflows/cygwin-test.yml
@@ -63,11 +63,11 @@ jobs:
     - name: Update PyPA packages
       run: |
         # Get the latest pip, wheel, and prior to Python 3.12, setuptools.
-        python -m pip -vvv install -U pip $(pip freeze --all | grep -ow ^setuptools) wheel
+        python -m pip -vvv --no-cache-dir install -U pip $(pip freeze --all | grep -ow ^setuptools) wheel
 
     - name: Install project and test dependencies
       run: |
-        pip install -vvv ".[test]"
+        pip install -vvv --no-cache-dir ".[test]"
 
     - name: Show version and platform information
       run: |

From b532be2c91f4ab87d51b3050d5b54da6ff2ba325 Mon Sep 17 00:00:00 2001
From: Eliah Kagan <degeneracypressure@gmail.com>
Date: Fri, 26 Jan 2024 18:00:18 -0500
Subject: [PATCH 11/29] Try with different tmp dir for pip runs

---
 .github/workflows/cygwin-test.yml | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/.github/workflows/cygwin-test.yml b/.github/workflows/cygwin-test.yml
index 350d7b4c9..87e432e6c 100644
--- a/.github/workflows/cygwin-test.yml
+++ b/.github/workflows/cygwin-test.yml
@@ -63,10 +63,13 @@ jobs:
     - name: Update PyPA packages
       run: |
         # Get the latest pip, wheel, and prior to Python 3.12, setuptools.
+        mkdir -- "$(pwd)/tmp"
+        export TEMP="$(pwd)/tmp" TMP="$(pwd)/tmp"
         python -m pip -vvv --no-cache-dir install -U pip $(pip freeze --all | grep -ow ^setuptools) wheel
 
     - name: Install project and test dependencies
       run: |
+        export TEMP="$(pwd)/tmp" TMP="$(pwd)/tmp"
         pip install -vvv --no-cache-dir ".[test]"
 
     - name: Show version and platform information

From b3de81b7152c32f1b45f45e55530f55ea670385f Mon Sep 17 00:00:00 2001
From: Eliah Kagan <degeneracypressure@gmail.com>
Date: Fri, 26 Jan 2024 18:26:16 -0500
Subject: [PATCH 12/29] Try with python39=3.9.16-1

---
 .github/workflows/cygwin-test.yml | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/.github/workflows/cygwin-test.yml b/.github/workflows/cygwin-test.yml
index 87e432e6c..b75164c21 100644
--- a/.github/workflows/cygwin-test.yml
+++ b/.github/workflows/cygwin-test.yml
@@ -30,7 +30,7 @@ jobs:
     - name: Install Cygwin
       uses: cygwin/cygwin-install-action@v4
       with:
-        packages: python39 python39-pip python39-virtualenv git
+        packages: python39=3.9.16-1 python39-pip python39-virtualenv git
         add-to-path: false  # No need to change $PATH outside the Cygwin environment.
 
     - name: Arrange for verbose output
@@ -63,14 +63,11 @@ jobs:
     - name: Update PyPA packages
       run: |
         # Get the latest pip, wheel, and prior to Python 3.12, setuptools.
-        mkdir -- "$(pwd)/tmp"
-        export TEMP="$(pwd)/tmp" TMP="$(pwd)/tmp"
-        python -m pip -vvv --no-cache-dir install -U pip $(pip freeze --all | grep -ow ^setuptools) wheel
+        python -m pip -vvv install -U pip $(pip freeze --all | grep -ow ^setuptools) wheel
 
     - name: Install project and test dependencies
       run: |
-        export TEMP="$(pwd)/tmp" TMP="$(pwd)/tmp"
-        pip install -vvv --no-cache-dir ".[test]"
+        pip -vvv install ".[test]"
 
     - name: Show version and platform information
       run: |

From a66b0d8ab44e982ee107473c94993fb9627dc7bf Mon Sep 17 00:00:00 2001
From: Eliah Kagan <degeneracypressure@gmail.com>
Date: Fri, 26 Jan 2024 18:34:27 -0500
Subject: [PATCH 13/29] Try not upgrading setuptools

---
 .github/workflows/cygwin-test.yml | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/.github/workflows/cygwin-test.yml b/.github/workflows/cygwin-test.yml
index b75164c21..a1f760a3e 100644
--- a/.github/workflows/cygwin-test.yml
+++ b/.github/workflows/cygwin-test.yml
@@ -30,7 +30,7 @@ jobs:
     - name: Install Cygwin
       uses: cygwin/cygwin-install-action@v4
       with:
-        packages: python39=3.9.16-1 python39-pip python39-virtualenv git
+        packages: python39 python39-pip python39-virtualenv git
         add-to-path: false  # No need to change $PATH outside the Cygwin environment.
 
     - name: Arrange for verbose output
@@ -62,8 +62,8 @@ jobs:
 
     - name: Update PyPA packages
       run: |
-        # Get the latest pip, wheel, and prior to Python 3.12, setuptools.
-        python -m pip -vvv install -U pip $(pip freeze --all | grep -ow ^setuptools) wheel
+        # Get the latest pip and wheel.
+        python -m pip -vvv install -U pip wheel
 
     - name: Install project and test dependencies
       run: |

From 83191473b4a62b44266ecdac58c6f2ca802ef573 Mon Sep 17 00:00:00 2001
From: Eliah Kagan <degeneracypressure@gmail.com>
Date: Fri, 26 Jan 2024 18:46:19 -0500
Subject: [PATCH 14/29] Try not installing Cygwin python39-pip package

---
 .github/workflows/cygwin-test.yml | 13 ++++---------
 1 file changed, 4 insertions(+), 9 deletions(-)

diff --git a/.github/workflows/cygwin-test.yml b/.github/workflows/cygwin-test.yml
index a1f760a3e..0fb0ac0be 100644
--- a/.github/workflows/cygwin-test.yml
+++ b/.github/workflows/cygwin-test.yml
@@ -30,7 +30,7 @@ jobs:
     - name: Install Cygwin
       uses: cygwin/cygwin-install-action@v4
       with:
-        packages: python39 python39-pip python39-virtualenv git
+        packages: python39 python39-virtualenv git
         add-to-path: false  # No need to change $PATH outside the Cygwin environment.
 
     - name: Arrange for verbose output
@@ -55,19 +55,14 @@ jobs:
         # and cause subsequent tests to fail
         cat test/fixtures/.gitconfig >> ~/.gitconfig
 
-    - name: Ensure the "pip" command is available
-      run: |
-        # This is used unless, and before, an updated pip is installed.
-        ln -s pip3 /usr/bin/pip
-
     - name: Update PyPA packages
       run: |
-        # Get the latest pip and wheel.
-        python -m pip -vvv install -U pip wheel
+        # Get the latest pip, wheel, and prior to Python 3.12, setuptools.
+        python -m pip install -U pip $(pip freeze --all | grep -ow ^setuptools) wheel
 
     - name: Install project and test dependencies
       run: |
-        pip -vvv install ".[test]"
+        python -m pip install ".[test]"
 
     - name: Show version and platform information
       run: |

From 2a72692f71fafe81fcc131cd71cc9918a75ece62 Mon Sep 17 00:00:00 2001
From: Eliah Kagan <degeneracypressure@gmail.com>
Date: Fri, 26 Jan 2024 18:50:28 -0500
Subject: [PATCH 15/29] Run pip freeze effectively

This doesn't fix the bigger issue, it just addresses something from
the last commit.
---
 .github/workflows/cygwin-test.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/workflows/cygwin-test.yml b/.github/workflows/cygwin-test.yml
index 0fb0ac0be..4dd5f0b2a 100644
--- a/.github/workflows/cygwin-test.yml
+++ b/.github/workflows/cygwin-test.yml
@@ -58,7 +58,7 @@ jobs:
     - name: Update PyPA packages
       run: |
         # Get the latest pip, wheel, and prior to Python 3.12, setuptools.
-        python -m pip install -U pip $(pip freeze --all | grep -ow ^setuptools) wheel
+        python -m pip install -U pip $(python -m pip freeze --all | grep -ow ^setuptools) wheel
 
     - name: Install project and test dependencies
       run: |

From 7b84c9af0820a94e7edb16c8e443b36638eb1b26 Mon Sep 17 00:00:00 2001
From: Eliah Kagan <degeneracypressure@gmail.com>
Date: Fri, 26 Jan 2024 18:51:56 -0500
Subject: [PATCH 16/29] Try not installing python39-virtualenv either

---
 .github/workflows/cygwin-test.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/workflows/cygwin-test.yml b/.github/workflows/cygwin-test.yml
index 4dd5f0b2a..8ddafd2a2 100644
--- a/.github/workflows/cygwin-test.yml
+++ b/.github/workflows/cygwin-test.yml
@@ -30,7 +30,7 @@ jobs:
     - name: Install Cygwin
       uses: cygwin/cygwin-install-action@v4
       with:
-        packages: python39 python39-virtualenv git
+        packages: python39 git
         add-to-path: false  # No need to change $PATH outside the Cygwin environment.
 
     - name: Arrange for verbose output

From 2bb2f6b74053824ca6f6ddc07c00980a6b4e85a8 Mon Sep 17 00:00:00 2001
From: Eliah Kagan <degeneracypressure@gmail.com>
Date: Fri, 26 Jan 2024 19:32:13 -0500
Subject: [PATCH 17/29] Try giving IPv4 for files.pythonhosted.org in hosts
 file

---
 .github/workflows/cygwin-test.yml | 19 ++++++++++++++++---
 1 file changed, 16 insertions(+), 3 deletions(-)

diff --git a/.github/workflows/cygwin-test.yml b/.github/workflows/cygwin-test.yml
index 8ddafd2a2..63d5a7288 100644
--- a/.github/workflows/cygwin-test.yml
+++ b/.github/workflows/cygwin-test.yml
@@ -30,7 +30,7 @@ jobs:
     - name: Install Cygwin
       uses: cygwin/cygwin-install-action@v4
       with:
-        packages: python39 git
+        packages: python39 python39-pip python39-virtualenv git
         add-to-path: false  # No need to change $PATH outside the Cygwin environment.
 
     - name: Arrange for verbose output
@@ -38,6 +38,14 @@ jobs:
         # Arrange for verbose output but without shell environment setup details.
         echo 'set -x' >~/.bash_profile
 
+    - name: Add PyPI hosts file entry  # NOTE: Actually edits the Windows hosts file.
+      run: |
+        echo '199.232.96.223 files.pythonhosted.org' >>/etc/hosts
+
+    - name: Show hosts file
+      run: |
+        cat /etc/hosts
+
     - name: Special configuration for Cygwin git
       run: |
         git config --global --add safe.directory "$(pwd)"
@@ -55,14 +63,19 @@ jobs:
         # and cause subsequent tests to fail
         cat test/fixtures/.gitconfig >> ~/.gitconfig
 
+    - name: Ensure the "pip" command is available
+      run: |
+        # This is used unless, and before, an updated pip is installed.
+        ln -s pip3 /usr/bin/pip
+
     - name: Update PyPA packages
       run: |
         # Get the latest pip, wheel, and prior to Python 3.12, setuptools.
-        python -m pip install -U pip $(python -m pip freeze --all | grep -ow ^setuptools) wheel
+        python -m pip install -U pip $(pip freeze --all | grep -ow ^setuptools) wheel
 
     - name: Install project and test dependencies
       run: |
-        python -m pip install ".[test]"
+        pip install ".[test]"
 
     - name: Show version and platform information
       run: |

From 7be530ae3cd63ad56c0c9c9facbb25457e75d07e Mon Sep 17 00:00:00 2001
From: Eliah Kagan <degeneracypressure@gmail.com>
Date: Fri, 26 Jan 2024 19:40:54 -0500
Subject: [PATCH 18/29] Try downloading wheel with wget

This is not a usable solution, but it is useful for troubleshooting.
---
 .github/workflows/cygwin-test.yml | 11 ++---------
 1 file changed, 2 insertions(+), 9 deletions(-)

diff --git a/.github/workflows/cygwin-test.yml b/.github/workflows/cygwin-test.yml
index 63d5a7288..580f3f749 100644
--- a/.github/workflows/cygwin-test.yml
+++ b/.github/workflows/cygwin-test.yml
@@ -30,7 +30,7 @@ jobs:
     - name: Install Cygwin
       uses: cygwin/cygwin-install-action@v4
       with:
-        packages: python39 python39-pip python39-virtualenv git
+        packages: python39 python39-pip python39-virtualenv git wget
         add-to-path: false  # No need to change $PATH outside the Cygwin environment.
 
     - name: Arrange for verbose output
@@ -38,14 +38,6 @@ jobs:
         # Arrange for verbose output but without shell environment setup details.
         echo 'set -x' >~/.bash_profile
 
-    - name: Add PyPI hosts file entry  # NOTE: Actually edits the Windows hosts file.
-      run: |
-        echo '199.232.96.223 files.pythonhosted.org' >>/etc/hosts
-
-    - name: Show hosts file
-      run: |
-        cat /etc/hosts
-
     - name: Special configuration for Cygwin git
       run: |
         git config --global --add safe.directory "$(pwd)"
@@ -71,6 +63,7 @@ jobs:
     - name: Update PyPA packages
       run: |
         # Get the latest pip, wheel, and prior to Python 3.12, setuptools.
+        wget -P ~/.cache/pip 'https://files.pythonhosted.org:443/packages/c7/c3/55076fc728723ef927521abaa1955213d094933dc36d4a2008d5101e1af5/wheel-0.42.0-py3-none-any.whl'
         python -m pip install -U pip $(pip freeze --all | grep -ow ^setuptools) wheel
 
     - name: Install project and test dependencies

From 4c9df4337467f0157e2f45ff13910be4fd784541 Mon Sep 17 00:00:00 2001
From: Eliah Kagan <degeneracypressure@gmail.com>
Date: Fri, 26 Jan 2024 19:58:04 -0500
Subject: [PATCH 19/29] Try with python39-pip=23.0.1-1

And don't upgrade it or other PyPI packages.
---
 .github/workflows/cygwin-test.yml | 15 ++-------------
 1 file changed, 2 insertions(+), 13 deletions(-)

diff --git a/.github/workflows/cygwin-test.yml b/.github/workflows/cygwin-test.yml
index 580f3f749..2fa75c7b8 100644
--- a/.github/workflows/cygwin-test.yml
+++ b/.github/workflows/cygwin-test.yml
@@ -30,7 +30,7 @@ jobs:
     - name: Install Cygwin
       uses: cygwin/cygwin-install-action@v4
       with:
-        packages: python39 python39-pip python39-virtualenv git wget
+        packages: python39 python39-pip=23.0.1-1 python39-virtualenv git
         add-to-path: false  # No need to change $PATH outside the Cygwin environment.
 
     - name: Arrange for verbose output
@@ -55,20 +55,9 @@ jobs:
         # and cause subsequent tests to fail
         cat test/fixtures/.gitconfig >> ~/.gitconfig
 
-    - name: Ensure the "pip" command is available
-      run: |
-        # This is used unless, and before, an updated pip is installed.
-        ln -s pip3 /usr/bin/pip
-
-    - name: Update PyPA packages
-      run: |
-        # Get the latest pip, wheel, and prior to Python 3.12, setuptools.
-        wget -P ~/.cache/pip 'https://files.pythonhosted.org:443/packages/c7/c3/55076fc728723ef927521abaa1955213d094933dc36d4a2008d5101e1af5/wheel-0.42.0-py3-none-any.whl'
-        python -m pip install -U pip $(pip freeze --all | grep -ow ^setuptools) wheel
-
     - name: Install project and test dependencies
       run: |
-        pip install ".[test]"
+        python -m pip install ".[test]"
 
     - name: Show version and platform information
       run: |

From fd49bcf0cb44283a2d2448346b7831c10183829b Mon Sep 17 00:00:00 2001
From: Eliah Kagan <degeneracypressure@gmail.com>
Date: Fri, 26 Jan 2024 20:06:19 -0500
Subject: [PATCH 20/29] Pin pip with pip (Cygwin package doesn't pin)

This tries with an older pip, but if the problem is the build
rather than the version, then it would also help.
---
 .github/workflows/cygwin-test.yml | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/cygwin-test.yml b/.github/workflows/cygwin-test.yml
index 2fa75c7b8..6d823a8e6 100644
--- a/.github/workflows/cygwin-test.yml
+++ b/.github/workflows/cygwin-test.yml
@@ -30,7 +30,7 @@ jobs:
     - name: Install Cygwin
       uses: cygwin/cygwin-install-action@v4
       with:
-        packages: python39 python39-pip=23.0.1-1 python39-virtualenv git
+        packages: python39 python39-virtualenv git
         add-to-path: false  # No need to change $PATH outside the Cygwin environment.
 
     - name: Arrange for verbose output
@@ -55,6 +55,10 @@ jobs:
         # and cause subsequent tests to fail
         cat test/fixtures/.gitconfig >> ~/.gitconfig
 
+    - name: Pin pip
+      run: |
+        python -m pip install pip==23.3.1
+
     - name: Install project and test dependencies
       run: |
         python -m pip install ".[test]"

From 3019bf8e14d234dd88d8603a6ef6acf5f9d707fa Mon Sep 17 00:00:00 2001
From: Eliah Kagan <degeneracypressure@gmail.com>
Date: Fri, 26 Jan 2024 21:33:01 -0500
Subject: [PATCH 21/29] Stop pinning; keep skipping -U for PyPA; instrument
 with -vvv

This won't fix it but is diagnostic, to reveal the URL for the
coverage package, so I can see what happens when that is installed
more manually.
---
 .github/workflows/cygwin-test.yml | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/.github/workflows/cygwin-test.yml b/.github/workflows/cygwin-test.yml
index 6d823a8e6..18a2d083c 100644
--- a/.github/workflows/cygwin-test.yml
+++ b/.github/workflows/cygwin-test.yml
@@ -30,7 +30,7 @@ jobs:
     - name: Install Cygwin
       uses: cygwin/cygwin-install-action@v4
       with:
-        packages: python39 python39-virtualenv git
+        packages: python39 python39-pip python39-virtualenv git
         add-to-path: false  # No need to change $PATH outside the Cygwin environment.
 
     - name: Arrange for verbose output
@@ -55,13 +55,14 @@ jobs:
         # and cause subsequent tests to fail
         cat test/fixtures/.gitconfig >> ~/.gitconfig
 
-    - name: Pin pip
+    - name: Ensure the "pip" command is available
       run: |
-        python -m pip install pip==23.3.1
+        # This is used unless, and before, an updated pip is installed.
+        ln -s pip3 /usr/bin/pip
 
     - name: Install project and test dependencies
       run: |
-        python -m pip install ".[test]"
+        pip -vvv install ".[test]"
 
     - name: Show version and platform information
       run: |

From 9184a7273f8baa0c29110504758fbc3545fd8445 Mon Sep 17 00:00:00 2001
From: Eliah Kagan <degeneracypressure@gmail.com>
Date: Fri, 26 Jan 2024 21:38:04 -0500
Subject: [PATCH 22/29] Try installing coverage[toml] separately

---
 .github/workflows/cygwin-test.yml | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/.github/workflows/cygwin-test.yml b/.github/workflows/cygwin-test.yml
index 18a2d083c..b9ad04ef1 100644
--- a/.github/workflows/cygwin-test.yml
+++ b/.github/workflows/cygwin-test.yml
@@ -60,6 +60,10 @@ jobs:
         # This is used unless, and before, an updated pip is installed.
         ln -s pip3 /usr/bin/pip
 
+    - name: Install code coverage dependencies
+      run: |
+        pip -vvv install "coverage[toml]"
+
     - name: Install project and test dependencies
       run: |
         pip -vvv install ".[test]"

From bf54c2f68543fd9191a0ebdb1f8959b267735b00 Mon Sep 17 00:00:00 2001
From: Eliah Kagan <degeneracypressure@gmail.com>
Date: Fri, 26 Jan 2024 21:42:09 -0500
Subject: [PATCH 23/29] Unset -vvv to see the bigger picture more easily

---
 .github/workflows/cygwin-test.yml | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/.github/workflows/cygwin-test.yml b/.github/workflows/cygwin-test.yml
index b9ad04ef1..090a2603e 100644
--- a/.github/workflows/cygwin-test.yml
+++ b/.github/workflows/cygwin-test.yml
@@ -62,11 +62,11 @@ jobs:
 
     - name: Install code coverage dependencies
       run: |
-        pip -vvv install "coverage[toml]"
+        pip install "coverage[toml]"
 
     - name: Install project and test dependencies
       run: |
-        pip -vvv install ".[test]"
+        pip install ".[test]"
 
     - name: Show version and platform information
       run: |

From 0b82dc69a83deb06b731ad9aa0d630d430cf8507 Mon Sep 17 00:00:00 2001
From: Eliah Kagan <degeneracypressure@gmail.com>
Date: Fri, 26 Jan 2024 22:03:37 -0500
Subject: [PATCH 24/29] Try killing pip after a timeout and rerunning it

---
 .github/workflows/cygwin-test.yml | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/.github/workflows/cygwin-test.yml b/.github/workflows/cygwin-test.yml
index 090a2603e..903daf504 100644
--- a/.github/workflows/cygwin-test.yml
+++ b/.github/workflows/cygwin-test.yml
@@ -60,13 +60,16 @@ jobs:
         # This is used unless, and before, an updated pip is installed.
         ln -s pip3 /usr/bin/pip
 
-    - name: Install code coverage dependencies
-      run: |
-        pip install "coverage[toml]"
-
     - name: Install project and test dependencies
       run: |
-        pip install ".[test]"
+        set +e
+        for t in {1..5}; do
+          echo "Starting try $t."
+          timeout 70s pip install ".[test]"
+          status="$?"
+          ((status == 124)) || break
+        done
+        exit "$status"
 
     - name: Show version and platform information
       run: |

From 20f1004668ec5ffbbabd913b460d1f997bfef745 Mon Sep 17 00:00:00 2001
From: Eliah Kagan <degeneracypressure@gmail.com>
Date: Fri, 26 Jan 2024 22:32:25 -0500
Subject: [PATCH 25/29] Use SIGKILL

---
 .github/workflows/cygwin-test.yml | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/.github/workflows/cygwin-test.yml b/.github/workflows/cygwin-test.yml
index 903daf504..62a77427c 100644
--- a/.github/workflows/cygwin-test.yml
+++ b/.github/workflows/cygwin-test.yml
@@ -65,9 +65,9 @@ jobs:
         set +e
         for t in {1..5}; do
           echo "Starting try $t."
-          timeout 70s pip install ".[test]"
+          timeout -s KILL 70s pip install ".[test]"
           status="$?"
-          ((status == 124)) || break
+          ((status == 137)) || break
         done
         exit "$status"
 

From 884c9dcfd49030757a322bbe9c7cec453db1be67 Mon Sep 17 00:00:00 2001
From: Eliah Kagan <degeneracypressure@gmail.com>
Date: Fri, 26 Jan 2024 22:43:29 -0500
Subject: [PATCH 26/29] Increase timeout from 70 to 120 seconds per try

---
 .github/workflows/cygwin-test.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/workflows/cygwin-test.yml b/.github/workflows/cygwin-test.yml
index 62a77427c..d8e111b33 100644
--- a/.github/workflows/cygwin-test.yml
+++ b/.github/workflows/cygwin-test.yml
@@ -65,7 +65,7 @@ jobs:
         set +e
         for t in {1..5}; do
           echo "Starting try $t."
-          timeout -s KILL 70s pip install ".[test]"
+          timeout -s KILL 2m pip install ".[test]"
           status="$?"
           ((status == 137)) || break
         done

From 4952a7263fd3abd1711d4a6066bbf27c82b8302b Mon Sep 17 00:00:00 2001
From: Eliah Kagan <degeneracypressure@gmail.com>
Date: Fri, 26 Jan 2024 22:59:12 -0500
Subject: [PATCH 27/29] Give each try a little more time than the last

Since it has to verify previous work.
---
 .github/workflows/cygwin-test.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/workflows/cygwin-test.yml b/.github/workflows/cygwin-test.yml
index d8e111b33..baf1273bd 100644
--- a/.github/workflows/cygwin-test.yml
+++ b/.github/workflows/cygwin-test.yml
@@ -65,7 +65,7 @@ jobs:
         set +e
         for t in {1..5}; do
           echo "Starting try $t."
-          timeout -s KILL 2m pip install ".[test]"
+          timeout -s KILL "$((30 * (t + 1)))"s pip install ".[test]"
           status="$?"
           ((status == 137)) || break
         done

From b5865ffbac710083253a63aeab4217c5a99e30d4 Mon Sep 17 00:00:00 2001
From: Eliah Kagan <degeneracypressure@gmail.com>
Date: Fri, 26 Jan 2024 23:38:25 -0500
Subject: [PATCH 28/29] Tweak (re)try parameters

---
 .github/workflows/cygwin-test.yml | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/.github/workflows/cygwin-test.yml b/.github/workflows/cygwin-test.yml
index baf1273bd..c6ad8623c 100644
--- a/.github/workflows/cygwin-test.yml
+++ b/.github/workflows/cygwin-test.yml
@@ -63,9 +63,9 @@ jobs:
     - name: Install project and test dependencies
       run: |
         set +e
-        for t in {1..5}; do
+        for t in {1..10}; do
           echo "Starting try $t."
-          timeout -s KILL "$((30 * (t + 1)))"s pip install ".[test]"
+          timeout -s KILL "$((10 + t * 20))"s pip install ".[test]"
           status="$?"
           ((status == 137)) || break
         done

From 34bbf7364745c71f0b770f5d4e47ebaebd909f5d Mon Sep 17 00:00:00 2001
From: Eliah Kagan <degeneracypressure@gmail.com>
Date: Sat, 27 Jan 2024 00:24:48 -0500
Subject: [PATCH 29/29] Try Python 3.8

---
 .github/workflows/cygwin-test.yml | 25 +++++++++----------------
 1 file changed, 9 insertions(+), 16 deletions(-)

diff --git a/.github/workflows/cygwin-test.yml b/.github/workflows/cygwin-test.yml
index c6ad8623c..84a7f6490 100644
--- a/.github/workflows/cygwin-test.yml
+++ b/.github/workflows/cygwin-test.yml
@@ -30,7 +30,7 @@ jobs:
     - name: Install Cygwin
       uses: cygwin/cygwin-install-action@v4
       with:
-        packages: python39 python39-pip python39-virtualenv git
+        packages: python38 python38-pip python38-virtualenv git
         add-to-path: false  # No need to change $PATH outside the Cygwin environment.
 
     - name: Arrange for verbose output
@@ -55,30 +55,23 @@ jobs:
         # and cause subsequent tests to fail
         cat test/fixtures/.gitconfig >> ~/.gitconfig
 
-    - name: Ensure the "pip" command is available
+    - name: Update PyPA packages
       run: |
-        # This is used unless, and before, an updated pip is installed.
-        ln -s pip3 /usr/bin/pip
+        # Get the latest pip, setuptools, and wheel.
+        python3.8 -m pip install -U pip setuptools wheel
 
     - name: Install project and test dependencies
       run: |
-        set +e
-        for t in {1..10}; do
-          echo "Starting try $t."
-          timeout -s KILL "$((10 + t * 20))"s pip install ".[test]"
-          status="$?"
-          ((status == 137)) || break
-        done
-        exit "$status"
+        python3.8 -m pip install ".[test]"
 
     - name: Show version and platform information
       run: |
         uname -a
-        command -v git python
+        command -v git python3.8
         git version
-        python --version
-        python -c 'import os, sys; print(f"sys.platform={sys.platform!r}, os.name={os.name!r}")'
+        python3.8 --version
+        python3.8 -c 'import os, sys; print(f"sys.platform={sys.platform!r}, os.name={os.name!r}")'
 
     - name: Test with pytest
       run: |
-        pytest --color=yes -p no:sugar --instafail -vv
+        python3.8 -m pytest --color=yes -p no:sugar --instafail -vv