[TerkinData] Build and run using PlatformIO, for POSIX / native builds

Following recent improvements, this patch dissolves previous Makefile-
based build tooling also for native platform targets.

The functional Makefile-based entrypoints are still there, but now they
will divert to `pio run -t exec` right away.

  make csv
  make json
  make urlencoded

Author: amotl

libraries/TerkinData/examples/Makefile

@@ -1,66 +1,55 @@
-.DEFAULT_GOAL := build
+.DEFAULT_GOAL := all
 
-$(eval venvpath  := $(PWD)/.venv)
-$(eval python    := $(venvpath)/bin/python)
-$(eval pip       := $(venvpath)/bin/pip)
-$(eval pio       := $(venvpath)/bin/pio)
+
+# =============
+# Prerequisites
+# =============
+
+include util.mk
+
+
+# =============
+# Configuration
+# =============
 
 export PLATFORMIO_WORKSPACE_DIR := $(PWD)/.pio
 export BUILD_DIR := $(PWD)/.build
 
 
+# =================
+# Workhorse targets
+# =================
+
+# Main entrypoint targets.
+all: run build
+run: posix-run
+
+# Run all POSIX program examples.
+posix-run: csv json urlencoded
+
+
 # ==================================================
 # Build all examples for all PlatformIO environments
 # ==================================================
 
-setup-virtualenv:
-	@test -e $(python) || python3 -m venv $(venvpath)
-	$(pip) --quiet install platformio
-
 build: setup-virtualenv
 	PLATFORMIO_SRC_DIR=csv $(pio) run  # --verbose
 	PLATFORMIO_SRC_DIR=json $(pio) run  # --verbose
 	PLATFORMIO_SRC_DIR=urlencoded $(pio) run  # --verbose
 
-upload: setup-virtualenv
-	$(pio) run --target upload --upload-port=${MCU_PORT}
-
-
-# ==================================
-# Build and run all examples (POSIX)
-# ==================================
-
-posix-build:
-	./compile csv/csv_basic.cpp
-	./compile json/json_basic.cpp
-	./compile urlencoded/urlencoded_basic.cpp
-	@echo
-
-posix-run: posix-build
-	${BUILD_DIR}/csv_basic
-	@echo
-	${BUILD_DIR}/json_basic
-	@echo
-	${BUILD_DIR}/urlencoded_basic
-	@echo
-
-run: posix-run
-
 
 # =========================================
 # Build and run individual examples (POSIX)
 # =========================================
 
-$(BUILD_DIR)/csv_basic:
-	./compile csv/csv_basic.cpp
-$(BUILD_DIR)/json_basic:
-	./compile json/json_basic.cpp
-$(BUILD_DIR)/urlencoded_basic:
-	./compile urlencoded/urlencoded_basic.cpp
-
-csv: $(BUILD_DIR)/csv_basic
-	$(BUILD_DIR)/csv_basic
-json: $(BUILD_DIR)/json_basic
-	$(BUILD_DIR)/json_basic
-urlencoded: $(BUILD_DIR)/urlencoded_basic
-	$(BUILD_DIR)/urlencoded_basic
+.PHONY: csv
+csv:
+	PLATFORMIO_SRC_DIR=csv pio run -e native -t exec
+
+.PHONY: json
+json:
+	PLATFORMIO_SRC_DIR=json pio run -e native -t exec
+
+.PHONY: urlencoded
+urlencoded:
+	PLATFORMIO_SRC_DIR=urlencoded pio run -e native -t exec

libraries/TerkinData/examples/compile

@@ -20,18 +20,45 @@
 
 [common]
 lib_deps =
-    SPI
+    # TODO: `MemoryFree` is currently a strong dependency of `Terrine` - make it an optional one.
     apechinsky/MemoryFree@^0.3
     # TODO: Update to ArduinoJson 6
     bblanchon/ArduinoJson@^5
-    mikem/RadioHead@^1.113
-    #paulstoffregen/Time@^1.6
 lib_extra_dirs =
     ${PROJECT_DIR}/../../../libraries
 
 build_flags =
 
 
+[env:native]
+# About:    Build and invoke example programs on your workstation (native / POSIX).
+# Synopsis: PLATFORMIO_SRC_DIR=csv pio run --environment native --target exec
+# Remark:   Run `pio pkg update` when invoking `exec` target fails.
+# Documentation:
+# - https://docs.platformio.org/en/latest/platforms/native.html
+# - https://docs.platformio.org/en/latest/platforms/creating_platform.html#build-script-main-py
+platform = native
+
+lib_compat_mode = off
+lib_deps =
+    # TODO: Update to ArduinoJson 6
+    bblanchon/ArduinoJson@^5
+    TerkinData
+    Terrine
+lib_extra_dirs =
+    ${PROJECT_DIR}/../../../libraries
+build_flags =
+    -std=gnu++11
+    # FIXME: Why is that needed? What overwrites it?
+    -I ${platformio.libdeps_dir}/${this.__env__}/ArduinoJson
+    -DHAVE_ARDUINO_JSON
+    # -g -lstdc++
+    # -Os -fno-exceptions -ffunction-sections -fdata-sections -fpermissive
+    # -Wno-builtin-macro-redefined -Wno-unused-function -fdiagnostics-color
+    # -Wall
+    # -Wextra
+
+
 [env:avr328]
 platform = atmelavr
 board = pro8MHzatmega328

libraries/TerkinData/examples/platformio.ini

@@ -0,0 +1,11 @@
+$(eval venvpath  := $(PWD)/.venv)
+$(eval python    := $(venvpath)/bin/python)
+$(eval pip       := $(venvpath)/bin/pip)
+$(eval pio       := $(venvpath)/bin/pio)
+
+setup-virtualenv:
+	@test -e $(python) || python3 -m venv $(venvpath)
+	$(pip) --quiet install platformio
+
+upload: setup-virtualenv
+	$(pio) run --target upload --upload-port=${MCU_PORT}