CLI first-run process creates repeating visual artifacts

Steps to reproduce

Build SDK docker container @ https://github.com/dotnet/dotnet-docker/tree/master/2.0/sdk/stretch/amd64

In that directory, run the following command:

docker build -t sdk-test .

Expected behavior

No duplicate artifacts

Actual behavior

A command is running to populate your local package cache to improve restore speed and enable offline access. This command takes up to one minute to complete and only runs once. Decompressing 0%…1%…2%…3%…4%…5%…6%…7%…8%…9%…10%…11%…12%…13%…14%…15%…16%…17%…18%…19%…20%…21%…22%…23%…24%…25%…26%…27%…28%…29%…30%…31%…32%…33%…34%…35%…36%…37%…38%…39%…40%…41%…42%…43%…44%…45%…46%…47%…48%…49%…50%…51%…52%…53%…54%…55%…56%…57%…58%…59%…60%…61%…62%…63%…64%…65%…66%…67%…68%…69%…70%…71%…72%…73%…74%…75%…76%…77%…78%…79%…80%…81%…82%…83%…84%…85%…86%…87%…88%…89%…90%…91%…92%…93%…94%…95%…96%…97%…98%…99%…100% 7108 ms Expanding 0%…1%…2%…3%…4%…5%…6%…7%…8%…9%…10%…11%…12%…13%…14%…15%…16%…17%…18%…19%…20%…21%…22%…23%…24%…25%…26%…27%…28%…29%…30%…31%…32%…33%…34%…35%…36%…37%…38%…39%…40%…41%…42%…43%…44%…45%…46%…47%…48%…49%…50%…51%…52%…53%…54%…55%…56%…57%…58%…59%…60%…61%…62%…63%…64%…65%…66%…67%…68%…69%…70%…71%…72%…73%…74%…75%…76%…77%…78%…79%…80%…81%…82%…83%…84%…85%…86%…87%…88%…89%…90%…91%…92%…93%…94%…95%…96%…97%…98%…99%…100% 16836 ms

Environment

Happens with cmd.exe and bash when building container images with Docker.exe.

[peterhuene]

After changing it to a period representing every 10%, I prefer it as it shows progress without being overly verbose. Let’s go with that unless anyone has objections.

[peterhuene]

I have a fix for this that will print a period for each percentage completed. So it would look like this when redirected:

Foobar .................................................................................................... 5170 ms

Does this work for everyone or is that too long? I’m fine with one period representing 10% too.