Run Cygwin CI workflow commands in login shells

.github/workflows/cygwin-test.yml

@@ -10,30 +10,36 @@ jobs:
  fail-fast: false
 
  env:
- CHERE_INVOKING: 1
- TMP: "/tmp"
- TEMP: "/tmp"
+ CHERE_INVOKING: "1"
+ CYGWIN_NOWINPATH: "1"
 
  defaults:
  run:
- shell: C:\cygwin\bin\bash.exe --noprofile --norc -exo pipefail -o igncr "{0}"
+ shell: C:\cygwin\bin\bash.exe --login --norc -eo pipefail -o igncr "{0}"
 
  steps:
  - name: Force LF line endings
  run: |
  git config --global core.autocrlf false # Affects the non-Cygwin git.
- shell: bash
+ shell: bash # Use Git Bash instead of Cygwin Bash for this step.
 
  - uses: actions/checkout@v4
  with:
  fetch-depth: 0
  submodules: recursive
 
- - uses: cygwin/cygwin-install-action@v4
+ - name: Install Cygwin
+ uses: cygwin/cygwin-install-action@v4
  with:
  packages: python39 python39-pip python39-virtualenv git
+ add-to-path: false # No need to change $PATH outside the Cygwin environment.
 
- - name: Special configuration for Cygwin's git
+ - name: Arrange for verbose output
+ run: |
+ # Arrange for verbose output but without shell environment setup details.
+ echo 'set -x' >~/.bash_profile
+
+ - name: Special configuration for Cygwin git
  run: |
  git config --global --add safe.directory "$(pwd)"
  git config --global core.autocrlf false
@@ -57,7 +63,7 @@ jobs:
 
  - name: Install project and test dependencies
  run: |
- python -m pip install ".[test]"
+ pip install ".[test]"
 
  - name: Show version and platform information
  run: |
@@ -71,4 +77,4 @@ jobs:
 
  - name: Test with pytest
  run: |
- python -m pytest --color=yes -p no:sugar --instafail -vv
+ pytest --color=yes -p no:sugar --instafail -vv