Improve VS Code with GN build (project-chip#1878)

* Fix VSCode problem matcher for GN

GN runs the compiler in the build directory, so add that as the base
path for the VSCode task.

* Copy Nordic SDK into vscode container

This is not currently included in the devcontainer. Add it by copying it
from the chip-build-nrf-platform container.

* Configure VS Code C/C++ extension to use GN compilation database

This fixes include paths & #defines to enable the richer IntelliSense
features of VS Code.

Usage:
  - Run Task: Update Compilation Database
  - Control-Shift-P -> C/C++ - Select a Configuration.

.vscode/c_cpp_properties.json

@@ -0,0 +1,53 @@
+{
+    "configurations": [
+        {
+            "name": "gcc debug (GN)",
+            "compileCommands": "${workspaceFolder}/out/debug/compile_commands.gcc.json",
+            "compilerPath": "/usr/bin/gcc",
+            "cStandard": "c11",
+            "cppStandard": "c++11",
+            "intelliSenseMode": "gcc-x64",
+            "browse": {
+                "path": ["${workspaceFolder}/out/debug/"],
+                "limitSymbolsToIncludedHeaders": true
+            }
+        },
+        {
+            "name": "clang debug (GN)",
+            "compileCommands": "${workspaceFolder}/out/debug/compile_commands.clang.json",
+            "compilerPath": "/usr/bin/clang",
+            "cStandard": "c11",
+            "cppStandard": "c++11",
+            "intelliSenseMode": "clang-x64",
+            "browse": {
+                "path": ["${workspaceFolder}/out/debug/"],
+                "limitSymbolsToIncludedHeaders": true
+            }
+        },
+        {
+            "name": "gcc MbedTLS debug (GN)",
+            "compileCommands": "${workspaceFolder}/out/debug/compile_commands.mbedtls.json",
+            "compilerPath": "/usr/bin/gcc",
+            "cStandard": "c11",
+            "cppStandard": "c++11",
+            "intelliSenseMode": "gcc-x64",
+            "browse": {
+                "path": ["${workspaceFolder}/out/debug/"],
+                "limitSymbolsToIncludedHeaders": true
+            }
+        },
+        {
+            "name": "nRF5 examples debug (GN)",
+            "cStandard": "c11",
+            "cppStandard": "c++11",
+            "intelliSenseMode": "gcc-x64",
+            "compileCommands": "${workspaceFolder}/out/debug/compile_commands.nrf5.json",
+            "compilerPath": "/var/gcc-arm-none-eabi-9-2019-q4-major/bin/arm-none-eabi-gcc",
+            "browse": {
+                "path": ["${workspaceFolder}/out/debug/"],
+                "limitSymbolsToIncludedHeaders": true
+            }
+        }
+    ],
+    "version": 4
+}

.vscode/tasks.json

@@ -30,7 +30,23 @@
                 "reveal": "always",
                 "panel": "shared"
             },
-            "problemMatcher": ["$gcc"]
+            "problemMatcher": {
+                "base": "$gcc",
+                "fileLocation": ["relative", "${workspaceFolder}/out/debug/"]
+            }
+        },
+        {
+            "label": "Update compilation database",
+            "type": "shell",
+            "command": "scripts/helpers/update_compile_commands.sh",
+            "group": "none",
+            "dependsOn": "GN Build",
+            "isBackground": false,
+            "presentation": {
+                "reveal": "always",
+                "panel": "shared"
+            },
+            "problemMatcher": []
         },
         {
             "label": "Auto-enforce coding style",

integrations/docker/images/chip-build-vscode/Dockerfile

@@ -1,5 +1,11 @@
 ARG VERSION=latest
 FROM connectedhomeip/chip-build:${VERSION}
-FROM connectedhomeip/chip-build-nrf-platform:${VERSION}
+FROM connectedhomeip/chip-build-nrf-platform:${VERSION} AS nrf
 FROM connectedhomeip/chip-build-esp32:${VERSION}
 FROM connectedhomeip/chip-build-esp32-qemu:${VERSION}
+COPY --from=nrf /var/nRF5_tools /var/nRF5_tools
+COPY --from=nrf /var/nRF5_SDK_for_Thread_and_Zigbee /var/nRF5_SDK_for_Thread_and_Zigbee
+COPY --from=nrf /var/gcc-arm-none-eabi-9-2019-q4-major /var/gcc-arm-none-eabi-9-2019-q4-major
+ENV NRF5_SDK_ROOT=/var/nRF5_SDK_for_Thread_and_Zigbee
+ENV NRF5_TOOLS_ROOT=/var/nRF5_tools
+ENV ARM_GCC_INSTALL_ROOT=/var/gcc-arm-none-eabi-9-2019-q4-major/bin/

scripts/helpers/update_compile_commands.sh

@@ -0,0 +1,38 @@
+#!/usr/bin/env bash
+#
+# Copyright (c) 2020 Project CHIP Authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+# Update compilation database in VS Code devcontainer.
+
+set -e
+
+CHIP_ROOT="$(dirname "$0")/../.."
+
+set +e
+source "$CHIP_ROOT/scripts/activate.sh"
+set -e
+
+gn --root="$CHIP_ROOT" gen "$CHIP_ROOT/out/debug" --export-compile-commands=all_host_gcc
+mv "$CHIP_ROOT/out/debug/compile_commands.json" "$CHIP_ROOT/out/debug/compile_commands.gcc.json"
+
+gn --root="$CHIP_ROOT" gen "$CHIP_ROOT/out/debug" --export-compile-commands=all_host_clang
+mv "$CHIP_ROOT/out/debug/compile_commands.json" "$CHIP_ROOT/out/debug/compile_commands.clang.json"
+
+gn --root="$CHIP_ROOT" gen "$CHIP_ROOT/out/debug" --export-compile-commands=all_host_gcc_mbedtls
+mv "$CHIP_ROOT/out/debug/compile_commands.json" "$CHIP_ROOT/out/debug/compile_commands.mbedtls.json"
+
+gn --root="$CHIP_ROOT" gen "$CHIP_ROOT/out/debug" --export-compile-commands=nrf5_lock_app,nrf5_lighting_app
+mv "$CHIP_ROOT/out/debug/compile_commands.json" "$CHIP_ROOT/out/debug/compile_commands.nrf5.json"