Add Dev Container for local development

- colcon/colcon-clean#39

.devcontainer/devcontainer.json

@@ -0,0 +1,16 @@
+{
+    "name": "colcon-clean",
+    "image": "python:3",
+    "workspaceFolder": "/workspace/colcon-clean",
+    "workspaceMount": "source=${localWorkspaceFolder},target=${containerWorkspaceFolder},type=bind",
+    "onCreateCommand": ".devcontainer/on-create-command.sh",
+    "postCreateCommand": ".devcontainer/post-create-command.sh",
+    "customizations": {
+        "vscode": {
+            "settings": {},
+            "extensions": [
+                "ms-python.python"
+            ]
+        }
+    }
+}

.devcontainer/on-create-command.sh

@@ -0,0 +1,20 @@
+#!/bin/bash
+
+# Immediately catch all errors
+set -eo pipefail
+
+# Uncomment for debugging
+# set -x
+# env
+
+git config --global --add safe.directory "*"
+
+CONSTRAINTS_URL=https://raw.githubusercontent.com/colcon/ci/main/constraints.txt
+CONSTRAINTS_FILE=/tmp/constraints.txt
+
+# Download constraints
+curl -sSLo $CONSTRAINTS_FILE $CONSTRAINTS_URL
+# Remove this package from constraints
+sed -i "/^$(python setup.py --name)@/d" $CONSTRAINTS_FILE
+# Install dependencies, including any 'test' extras, as well as pytest-cov
+pip install -U -e .[test] pytest-cov -c $CONSTRAINTS_FILE

.devcontainer/post-create-command.sh

@@ -0,0 +1,11 @@
+#!/bin/bash
+
+# Immediately catch all errors
+set -eo pipefail
+
+# Uncomment for debugging
+# set -x
+# env
+
+# Enable autocomplete for user
+cp /etc/skel/.bashrc ~/

.vscode/settings.json

@@ -10,5 +10,16 @@
         "sched",
         "subverb",
         "subverbs"
-    ]
-}
+    ],
+    "python.languageServer": "Default",
+    "python.testing.pytestArgs": [
+        "--cov",
+        "--cov-branch",
+        "--cov-report",
+        "xml:coverage.xml",
+        "--cov-config",
+        "setup.cfg"
+    ],
+    "python.testing.unittestEnabled": false,
+    "python.testing.pytestEnabled": true
+}