ComposerRepository::loadAsyncPackages() fails when the network is down

[nicolas-grekas]

With a warm HTTP cache, I expected composer to still be able to proceed.

But after I shutdown my local network, eg composer create-project symfony/skeleton fails with a curl error.

I suspect that the promises in ComposerRepository::loadAsyncPackages() are missing the part to reuse the data from the cache when an transport exception occurs.

[nicolas-grekas]

(this works in composer 1 btw)

[Seldaek]

Setting COMPOSER_DISABLE_NETWORK=1 should fix this in composer 2, but anyway I agree it should behave nicer by default if possible. Will fix this.