Cache downloaded files

[mbanzi]

The tool MUST cache downloaded files.

Currently it downloads the update every time. If you need to update multiple boards , or just one board multiple times waiting for 2.3 GB to download is not practical and a waste of resources.

Additional context

Related

• Add download command to download images #18

[lucarin91]

@mbanzi, this issue is already solved in this PR. We added a download command, so if you want to flash multiple boards, you can first download the image and then flash it multiple times as follows:

arduino-flasher-cli download latest path/to/store/image
arduino-flasher-cli flash path/to/store/image/image.tar.gz

We decided to handle the issue in that way because otherwise we would need to provide a way to manage and clean up the downloaded cache of the user. Instead, with the download command, the user can handle their collections of images and flash as many times as they want.

Do you think this is sufficient for your case? We plan to release this feature next week.