pio library manager always downloads all libs to .piolibdeps even when building ones from a global storage

[vortigont]

Configuration

Linux x64, platformio cli

PlatformIO Version (platformio --version):
PlatformIO, version 3.6.1a4

Description of problem

Even if some libraries are installed in a global storage ( for ex. ~/.platformio/lib)
Platformio library manager always downloads all dependent libs to .piolibdeps project folder.
Building project with --verbose option shows that includes uses global storage libs. So why trashing every project with unused libs copies?

Steps to Reproduce

1. Install some libs to the global storage
2. Create project with libs existing in a global storage
3. Build project

Actual Results

Copies of all libs are downloaded into the .piolibdeps project folder but builder includes libs from a global storage

Expected Results

Do not download redundant libs to the project's folder

If problems with PlatformIO Build System:

The content of platformio.ini:

[platformio]                                                                                                                                                            src_dir = src                                                                                                                                                           env_default = esp8266_stable                                                                                                                                            lib_extra_dirs = ${sysenv.HOME}/dev/libraries                                                                                                                                                                                                                                                                                                   [common]
lib_deps_builtin =
  ArduinoJson
  Time

[env:esp8266_stable]
platform = espressif8266
board = d1_mini
framework = arduino
lib_deps =
  ${common.lib_deps_builtin}

Source file to reproduce issue:

#include <TimeLib.h>
#include <ArduinoJson.h>
void setup() {}
void loop() {}

Additional info

pio lib --global list | grep ID
Library Storage: /home/emil/.platformio/lib
#ID: 64
#ID: 44

 pio run --verbose
Processing esp8266_stable (platform: espressif8266; lib_deps: ArduinoJson, Time; board: d1_mini; framework: arduino)
Library Storage: /mnt/str/dev/testing/piotest/.piolibdeps
Looking for ArduinoJson library in registry
Found: https://platformio.org/lib/show/64/ArduinoJson
LibraryManager: Installing id=64
Downloading...
Unpacking  [####################################]  100%
ArduinoJson @ 5.13.2 has been successfully installed!
Looking for Time library in registry
Found: https://platformio.org/lib/show/44/Time
LibraryManager: Installing id=44
Downloading...
Unpacking  [####################################]  100%
Time @ 1.5 has been successfully installed!
PLATFORM: Espressif 8266 > WeMos D1 R2 & mini
SYSTEM: ESP8266 80MHz 80KB RAM (4MB Flash)
xtensa-lx106-elf-g++ -o "/mnt/str/dev/testing/piotest/src/test.ino.cpp" -x c++ -fpreprocessed -dD -E "/tmp/tmp5n5lR4"
Library Dependency Finder -> http://bit.ly/configure-pio-ldf
LDF MODES: FINDER(chain) COMPATIBILITY(soft)
Collected 32 compatible libraries
Scanning dependencies...
Dependency Graph
|-- <ArduinoJson> 5.13.2 (/mnt/str/dev/libraries/ArduinoJson_ID64)
|-- <Time> 1.5 (/mnt/str/dev/libraries/Time_ID44)
xtensa-lx106-elf-g++ -o .pioenvs/esp8266_stable/src/test.ino.cpp.o -c -fno-rtti -fno-exceptions -std=c++11 -Os -mlongcalls -mtext-section-literals -falign-functions=4 -U__STRICT_ANSI__ -ffunction-sections -fdata-sections -Wall -DPLATFORMIO=30601 -DESP8266 -DARDUINO_ARCH_ESP8266 -DESP8266_WEMOS_D1MINI -DF_CPU=80000000L -D__ets__ -DICACHE_FLASH -DARDUINO=10805 -DARDUINO_BOARD=\"PLATFORMIO_D1_MINI\" -DLWIP_OPEN_SRC -DVTABLES_IN_FLASH -Isrc -I/mnt/str/dev/libraries/ArduinoJson_ID64/src -I/mnt/str/dev/libraries/Time_ID44 -I/home/emil/.platformio/packages/framework-arduinoespressif8266/tools/sdk/include -I/home/emil/.platformio/packages/framework-arduinoespressif8266/tools/sdk/libc/xtensa-lx106-elf/include -I/home/emil/.platformio/packages/framework-arduinoespressif8266/cores/esp8266 -I/home/emil/.platformio/packages/framework-arduinoespressif8266/tools/sdk/lwip/include -I/home/emil/.platformio/packages/framework-arduinoespressif8266/variants/d1_mini src/test.ino.cpp

ls .piolibdeps/
ArduinoJson_ID64  Time_ID44

[ivankravets]

Starting from PlatformIO Core 4.0 PlatformIO install libraries into isolated storage per project environment. If you would like to have the one library storage per different projects, please use the same path for http://docs.platformio.org/en/latest/projectconf/section_platformio.html#libdeps-dir