dvc list proposal: output examples

file-path-as-url-0.md

$ cd ~
$ dvc list  # Default url = .
ERROR: The current working directory doesn't seem to be part of a DVC project.

file-path-as-url-1.md

$ git clone [email protected]:iterative/example-get-started.git
$ cd example-get-started
$ dvc list .
INFO: Listing LOCAL DVC project files, directories, and data at
      /home/uname/example-get-started/

 17B 2019-09-20 .gitignore
6.0K 2019-09-20 README.md
  9B 2019-09-20 auc.metric
128B 2019-09-20 data/
415B 2019-09-20 evaluate.dvc
367B 2019-09-20 featurize.dvc
337B 2019-09-20 prepare.dvc
224B 2019-09-20 src/
339B 2019-09-20 train.dvc
5.8M            └ out: (model.pkl)

WARNING: There are missing data files in the given path (shown in parentheses).
         Use dvc status to review them or dvc pull to download them.
         See http://man.dvc.org/status and http://man.dvc.org/pull.

file-path-as-url-2.md

# Continuation of file-path-as-url-1.md above. 
$ dvc pull featurize.dvc
$ dvc list featurize.dvc  # With target DVC-file
INFO: Listing LOCAL DVC project files, directories, and data at
      /home/uname/example-get-started/
INFO: Limiting list to data outputs from featurize.dvc stage.

367B 2019-09-20 featurize.dvc
2.7M            └ out: data/features/test.pkl
 11M            └ out: data/features/train.pkl

github-url-1-ssh.md

$ dvc list [email protected]:iterative/example-get-started.git  # SSH URL
 17B 2019-09-03 .gitignore
6.0K 2019-09-03 README.md
  9B 2019-09-03 auc.metric
128B 2019-09-03 data/
415B 2019-09-03 evaluate.dvc
367B 2019-09-03 featurize.dvc
337B 2019-09-03 prepare.dvc
224B 2019-09-03 src/
339B 2019-09-03 train.dvc
5.8M            └ out: model.pkl

github-url-2-http.md

$ dvc list https://github.com/iterative/dataset-registry  # HTTP URL
1.9K 2019-08-27 README.md
160B 2019-08-27 get-started/
128B 2019-08-27 tutorial/

github-url-3-recursive.md

$ dvc list --recursive https://github.com/iterative/dataset-registry tutorial  # Recursive inside target dir
INFO: Limiting list to files and directories in tutorial/
INFO: Expanding list recursively.

 29B 2019-08-29 tutorial/nlp/.gitignore
178B 2019-08-29 tutorial/nlp/Posts.xml.zip.dvc
 10M            └ out: tutorial/nlp/Posts.xml.zip
177B 2019-08-29 tutorial/nlp/pipeline.zip.dvc
4.6K            └ out: tutorial/nlp/pipeline.zip
 26B 2019-08-27 tutorial/ver/.gitignore
173B 2019-08-27 tutorial/ver/data.zip.dvc
 39M            └ out: tutorial/ver/data.zip
179B 2019-08-27 tutorial/ver/new-labels.zip.dvc
 22M            └ out: tutorial/ver/new-labels.zip

Moved over to iterative/dvc#2569.