Use constraints to install development HEADs (#3)

Rather than using the freeze-then-update strategy to ensure that the
development HEAD of colcon repositories are used for colcon package CI,
use a constraints file.

This should be a bit more efficient.

action.yaml

@@ -18,10 +18,10 @@ runs:
         echo ::endgroup::
 
         echo ::group::Install dependencies
-        # Install dependencies, including any 'test' extras
-        python -m pip install -c $GITHUB_ACTION_PATH/constraints.txt -U -e .[test]
-        # Install pytest-cov and use HEAD for any colcon packages
-        python -m pip freeze | { grep ^colcon || :; } | sed 's|\(.*\)==.*|git+https://github.com/colcon/\1.git|g' | xargs python -m pip install -c $GITHUB_ACTION_PATH/constraints.txt -U pytest-cov
+        # Remove this package from constraints
+        grep -v "^$(python setup.py --name)@" ${GITHUB_ACTION_PATH}/constraints.txt > constraints.txt
+        # Install dependencies, including any 'test' extras, as well as pytest-cov
+        python -m pip install -U -e .[test] pytest-cov -c constraints.txt
         echo ::endgroup::
 
         echo ::group::Run tests

constraints.txt

@@ -1 +1,46 @@
+colcon-alias@ git+https://github.com/colcon/colcon-alias.git
+colcon-argcomplete@ git+https://github.com/colcon/colcon-argcomplete.git
+colcon-bash@ git+https://github.com/colcon/colcon-bash.git
+colcon-bazel@ git+https://github.com/colcon/colcon-bazel.git
+colcon-bundle@ git+https://github.com/colcon/colcon-bundle.git
+colcon-cargo@ git+https://github.com/colcon/colcon-cargo.git
+colcon-cd@ git+https://github.com/colcon/colcon-cd.git
+colcon-clean@ git+https://github.com/colcon/colcon-clean.git
+colcon-cmake@ git+https://github.com/colcon/colcon-cmake.git
+colcon-common-extensions@ git+https://github.com/colcon/colcon-common-extensions.git
+colcon-core@ git+https://github.com/colcon/colcon-core.git
+colcon-coveragepy-result@ git+https://github.com/colcon/colcon-coveragepy-result.git
+colcon-defaults@ git+https://github.com/colcon/colcon-defaults.git
+colcon-devtools@ git+https://github.com/colcon/colcon-devtools.git
+colcon-ed@ git+https://github.com/colcon/colcon-ed.git
+colcon-gradle@ git+https://github.com/colcon/colcon-gradle.git
+colcon-graphviz-anim@ git+https://github.com/colcon/colcon-graphviz-anim.git
+colcon-hardware-acceleration@ git+https://github.com/colcon/colcon-hardware-acceleration.git
+colcon-installed-package-information@ git+https://github.com/colcon/colcon-installed-package-information.git
+colcon-lcov-result@ git+https://github.com/colcon/colcon-lcov-result.git
+colcon-library-path@ git+https://github.com/colcon/colcon-library-path.git
+colcon-meson@ git+https://github.com/colcon/colcon-meson.git
+colcon-metadata@ git+https://github.com/colcon/colcon-metadata.git
+colcon-mixin@ git+https://github.com/colcon/colcon-mixin.git
+colcon-notification@ git+https://github.com/colcon/colcon-notification.git
+colcon-output@ git+https://github.com/colcon/colcon-output.git
+colcon-override-check@ git+https://github.com/colcon/colcon-override-check.git
+colcon-package-information@ git+https://github.com/colcon/colcon-package-information.git
+colcon-package-selection@ git+https://github.com/colcon/colcon-package-selection.git
+colcon-parallel-executor@ git+https://github.com/colcon/colcon-parallel-executor.git
+colcon-pkg-config@ git+https://github.com/colcon/colcon-pkg-config.git
+colcon-powershell@ git+https://github.com/colcon/colcon-powershell.git
+colcon-python-setup-py@ git+https://github.com/colcon/colcon-python-setup-py.git
+colcon-recursive-crawl@ git+https://github.com/colcon/colcon-recursive-crawl.git
+colcon-rerun@ git+https://github.com/colcon/colcon-rerun.git
+colcon-ros-bazel@ git+https://github.com/colcon/colcon-ros-bazel.git
+colcon-ros-bundle@ git+https://github.com/colcon/colcon-ros-bundle.git
+colcon-ros-cargo@ git+https://github.com/colcon/colcon-ros-cargo.git
+colcon-ros-domain-id-coordinator@ git+https://github.com/colcon/colcon-ros-domain-id-coordinator.git
+colcon-ros@ git+https://github.com/colcon/colcon-ros.git
+colcon-ros-gradle@ git+https://github.com/colcon/colcon-ros-gradle.git
+colcon-sanitizer-reports@ git+https://github.com/colcon/colcon-sanitizer-reports.git
+colcon-spawn-shell@ git+https://github.com/colcon/colcon-spawn-shell.git
+colcon-test-result@ git+https://github.com/colcon/colcon-test-result.git
+colcon-zsh@ git+https://github.com/colcon/colcon-zsh.git
 flake8<6