Request Feature: Support customize environment variable in c_cpp_properites.json

[453jerry]

When a project has a lot of include path and all include path is absolute path, then maintain c_cpp_properites.json is very uncomfortable.
for example:

"name": "Win32",
            "includePath": [
                "C:/Program Files (x86)/GNU Tools ARM Embedded/7 2017-q4-major/arm-none-eabi/include",
                "C:/Program Files (x86)/GNU Tools ARM Embedded/7 2017-q4-major/arm-none-eabi/include/c++/7.2.1",
                "C:/Program Files (x86)/GNU Tools ARM Embedded/7 2017-q4-major/arm-none-eabi/include/c++/7.2.1/arm-none-eabi",
                "C:/Program Files (x86)/GNU Tools ARM Embedded/7 2017-q4-major/lib/gcc/arm-none-eabi/7.2.1/include",
                "C:/Program Files (x86)/GNU Tools ARM Embedded/7 2017-q4-major/lib/gcc/arm-none-eabi/7.2.1/include-fixed",
                "${workspaceFolder}",
                "C:/nRF5_SDK_15.0.0_a53641a/components",
                "C:/nRF5_SDK_15.0.0_a53641a/components/libraries/experimental_memobj",
                "C:/nRF5_SDK_15.0.0_a53641a/components/libraries/experimental_section_vars",
                "C:/nRF5_SDK_15.0.0_a53641a/components/libraries/balloc",
                "C:/nRF5_SDK_15.0.0_a53641a/components/libraries/experimental_log",
                "C:/nRF5_SDK_15.0.0_a53641a/components/libraries/experimental_log/src",
                "C:/nRF5_SDK_15.0.0_a53641a/components/libraries/delay",
                "C:/nRF5_SDK_15.0.0_a53641a/components/libraries/bsp",
                "C:/nRF5_SDK_15.0.0_a53641a/components/libraries/strerror",
                "C:/nRF5_SDK_15.0.0_a53641a/components/libraries/util",
                "C:/nRF5_SDK_15.0.0_a53641a/components/drivers_nrf/nrf_soc_nosd",
                "C:/nRF5_SDK_15.0.0_a53641a/components/softdevice/mbr/nrf52832/headers",
                "C:/nRF5_SDK_15.0.0_a53641a/components/boards",
                "C:/nRF5_SDK_15.0.0_a53641a/components/toolchain/cmsis/include",
                "C:/nRF5_SDK_15.0.0_a53641a/modules/nrfx",
                "C:/nRF5_SDK_15.0.0_a53641a/modules/nrfx/templates",
                "C:/nRF5_SDK_15.0.0_a53641a/modules/nrfx/mdk",
                "C:/nRF5_SDK_15.0.0_a53641a/modules/nrfx/hal",
                "C:/nRF5_SDK_15.0.0_a53641a/integration/nrfx",
                "${workspaceFolder}/config"
            ]

I hope there this a way to customize env variable in c_cpp_properites.json, it will be very easy to maintain c_cpp_properites.json, and very simple to remove project to other environment.
for example:

"name": "Win32",
            "env": {

                "ARM_GCC":"C:/Program Files (x86)/GNU Tools ARM Embedded/7 2017-q4-major",
                "NRF52_SDK":"C:/nRF5_SDK_15.0.0_a53641a"
            },
            "includePath": [
                "${ARM_GCC}/arm-none-eabi/include",
                "${ARM_GCC}/arm-none-eabi/include/c++/7.2.1",
                "${ARM_GCC}/arm-none-eabi/include/c++/7.2.1/arm-none-eabi",
                "${ARM_GCC}/lib/gcc/arm-none-eabi/7.2.1/include",
                "${ARM_GCC}/lib/gcc/arm-none-eabi/7.2.1/include-fixed",
                "${workspaceFolder}",
                "${NRF52_SDK}/components",
                "${NRF52_SDK}/components/libraries/experimental_memobj",
                "${NRF52_SDK}/components/libraries/experimental_section_vars",
                "${NRF52_SDK}/components/libraries/balloc",
                "${NRF52_SDK}/components/libraries/experimental_log",
                "${NRF52_SDK}/components/libraries/experimental_log/src",
                "${NRF52_SDK}/components/libraries/delay",
                "${NRF52_SDK}/components/libraries/bsp",
                "${NRF52_SDK}/components/libraries/strerror",
                "${NRF52_SDK}/components/libraries/util",
                "${NRF52_SDK}/components/drivers_nrf/nrf_soc_nosd",
                "${NRF52_SDK}/components/softdevice/mbr/nrf52832/headers",
                "${NRF52_SDK}/components/boards",
                "${NRF52_SDK}/components/toolchain/cmsis/include",
                "${NRF52_SDK}/modules/nrfx",
                "${NRF52_SDK}/modules/nrfx/templates",
                "${NRF52_SDK}/modules/nrfx/mdk",
                "${NRF52_SDK}/modules/nrfx/hal",
                "${NRF52_SDK}/integration/nrfx",
                "${workspaceFolder}/config"
            ],

[bobbrow]

This will probably make it into the next release. I have a PR open for it.

[bobbrow]

This is implemented in 0.17.0. However, the "env" is at the root of the JSON object, not in the configuration.

{
   "env": { ... },
   "configurations": { ... },
   "version": 4
}

[453jerry]

Cool ! It's very helpful. Thank your