Drop "stage" ending for dev/platform to avoid issue with compatibility

[andig]

Coming from #1170 I've noticed that https://github.com/adafruit/DHT-sensor-library does not support espressif8266 as platform, only arduino.

For multi-platform pio builds that require ldf_compat_mode=2 that will be a problem (Platform incompatible library).

Registering a "foreign" library is already possible using pio lib register according to http://docs.platformio.org/en/latest/userguide/lib/cmd_register.html.

It would be helpful if there was a mechanism to specify additional properties for these foreign libraries like additional supported platforms.

[ivankravets]

It should help #1170 (comment)

[ivankravets]

We will remove _stage prefix for eps8266 dev/platform soon. It depends on PIO Core 3.5

[andig]

@ivankravets even when _stage is dropped, DHT still doesn't support e.g. esp8266 as you can reproduce when setting lib_compat_mode=2.

The problem with multi-platform builds is that I need the lib_compat_mode=2 e.g. for ESPAsyncWebserver and its 2 different platform dependencies. When setting this DHT is ignored.

I think we still need some kind of mechanism to provide additional compatibility information for non-pio libraries. Maybe user can file issues against the library registry?

[andig]

Here's an example:

[platformio]

[common_env_data]
lib_deps=
  ESPAsyncWebServer@^1.1
# Use git version for _stage compatibility (https://github.com/me-no-dev/ESPAsyncWebServer/issues/281)
#  https://github.com/me-no-dev/ESPAsyncWebServer.git
  OneWire@^2.3
  DHT Sensor Library@^1.3
  DallasTemperature@^3.7
  ArduinoJson@^5.1

[env:esp8266]
platform=https://github.com/platformio/platform-espressif8266.git#feature/2.4.0-rc2
board=esp12e
framework=arduino
# lib_compat_mode=1 allows non-git versions of DHT and ESPAsyncWebServer@^1.1
lib_compat_mode=1
lib_ldf_mode=deep
lib_deps=
  ${common_env_data.lib_deps}
  ESPAsyncTCP@^1.1.2
lib_ignore=
  AsyncTCP

[env:esp32]
# use stage version for added SPIFFS support
platform=espressif32_stage
board=featheresp32
framework=arduino
# lib_compat_mode=2 to avoid including ESPAsyncTCP
lib_compat_mode=2
lib_ldf_mode=deep
lib_deps=
  ${common_env_data.lib_deps}
  https://github.com/bbx10/DNSServer_tng
  AsyncTCP@^1.0
#  https://github.com/me-no-dev/AsyncTCP.git
lib_ignore=
  ESPAsyncTCP

The esp32 needs lib_compat_mode=2 or it will include ESPAsyncTCP which breaks the build.

Unfortunately, with lib_compat_mode=2 it does no longer include DHT (this has changed during the 3.5 pre release versions):

Library Dependency Graph
|-- <OneWire> v2.3.2
|-- <DallasTemperature> v3.7.7
|   |-- <OneWire> v2.3.2
|-- <ArduinoJson> v5.11.2
|-- <AsyncTCP> v1.0.0
|-- <WiFi> v1.0
|-- <HTTPClient> v1.1
|   |-- <WiFiClientSecure> v1.0
|   |   |-- <WiFi> v1.0
|   |-- <WiFi> v1.0
|-- <ArduinoOTA> v1.0
|   |-- <WiFi> v1.0
|   |-- <Update> v1.0
|   |-- <ESPmDNS> v1.0
|-- <ESPmDNS> v1.0
|-- <FS> v1.0
|-- <DNSServer> v1.1.0
|   |-- <WiFi> v1.0
|-- <SPIFFS> v1.0
|   |-- <FS> v1.0

Again, build breaks due to missing DHT.

So either additional compatibility can be specified for DHT or it needs to make an assumption to be compatible if not specified otherwise.

[ivankravets]

Done!