BUG: Сan't install tools if installation was interrupted

[brusherru]

I catch it when installing esp8266:esp8266, so I'll write steps about it.

Steps to reproduce

1. Add the additional URL into .cli-config.yml:

   board_manager:
     additional_urls:
       - http://arduino.esp8266.com/stable/package_esp8266com_index.json

2. Run arduino-cli core install esp8266:esp8266
3. It runs installation and shows progress bars...
4. Press "Ctrl+C" (abort installation) while it loads one of tools.
5. Run arduino-cli core install esp8266:esp8266 again

Expected behavior

It tries to download tools again and then installs the core.

Actual behavior

It exits with a message on each run:

Downloading esp8266:esptool@0.4.13...
esp8266:esptool@0.4.13 downloaded                                                                
Error: server returned a non-2XX status code
Error downloading esp8266:esptool@0.4.13

How to reproduce again

1. Go to the data folder (by default it is arduino15 folder)
2. Open staging/packages directory and remove all archives with esp tools.
3. Run arduino-cli core install esp8266:esp8266 — it will download tools again without error about "non-2XX status code".

So... looks like it can't override archive in the staging folder and throws an incorrect error 🤔

[cmaglie]

Interesting, right now I think that the installer just stops in the middle leaving in an dirty state.
I guess we should catch SIGINT and act accordingly during installation.

[ljcucc]

I have same problem 2. 😕

On windows 10:

username@DESKTOP C:\Users\username\bin\Arduino
$ arduino-cli core install esp8266:esp8266

Downloading esp8266:esptool@0.4.13...
esp8266:esptool@0.4.13 downloaded
Error: server returned a non-2XX status code
Error downloading esp8266:esptool@0.4.13

Then the .cli-config.yml file

board_manager: 
  additional_urls:
    - http://arduino.esp8266.com/stable/package_esp8266com_index.json 

But after I clean the data that failed to uninstall before, the installation will complete and without error message.