checkout/pull should write a summary of the working space changes

[shcheklein]

Now it writes the same message:

Preparing to collect status from https://remote.dvc.org/get-started
[##############################] 100% Collecting information
[##############################] 100% Analysing status.
[##############################] 100% Checkout finished!

Everything is up to date.

no matter if something changed or not. It's hard to see if it actually update the working space. I would suggest to write summary, similar to the way git is doing when you pull/push something.

[shcheklein]

Now w/o a progress bar it's even worse - Everything is up to date. for dvc pull and an empty output for the dvc checkout. I even though for a moment that I didn't know how dvc pull works and went to check the docs, before I realized that something is actually happening, it's changing something.

[jorgeorpinel]

Seems like both @bhavaniravi and @leehanchung also reported this in #2667 and #2838, respectively. Their comments:

When I do a dev pull and the data is fetched I don't get any response saying Sucess I have do a ls to verify whether the data folder has been created

---

(base) PS B:\user\example-get-started> ls .\data\

    Directory: B:\user\example-get-started\data

Mode                LastWriteTime         Length Name
----                -------------         ------ ----
-a----       11/22/2019  12:52 PM             11 .gitignore
-a----       11/22/2019  12:52 PM            155 data.xml.dvc

(base) PS B:\user\example-get-started> dvc pull
Everything is up to date.
(base) PS B:\user\example-get-started> ls data

    Directory: B:\user\example-get-started\data
Mode                LastWriteTime         Length Name
----                -------------         ------ ----
-a----       11/22/2019  12:52 PM             11 .gitignore
-a----       11/22/2019   2:52 PM       37916850 data.xml
-a----       11/22/2019  12:52 PM            155 data.xml.dvc

basically it doesnt tell what is pulled/changed at the moment.
And i do see a point of doing it none-verbose-ly if the dataset contains thousands of images inside a directory. :p

[casperdcl]

so should #2667 be closed as a duplicate?

[jorgeorpinel]

Idk. Already asked over there. Ivan and Ruslan have a long conversation in there, so let them decide.

[efiop]

Closed #2667 in favor of this one. Thanks for the heads up!