- fixes errant top level directory creation, regression introduced in #3313
- fixes `mc ls -r` regression introduced in #3476
- fixes other bugs such as `mc mirror` would perpetually hang if the
destination bucket doesn't exist, create and proceed instead.
- removes DirOpt style implementations for List, ListIncompleteUploads
these are not useful anymore.
--rewind will go back in time and select specific object versions that are
the latest at the specified time.
--versions will display all the versions
cp will just ignore if the latest version is a delete marker
ls will print delete markers with a (deleted) at the end
app.Before receives a cli.Context but without flags parsed. There is no
point calling ctx.Bool() or ctx.IsSet() at that stage.
However, flags are parsed in commands, so minio initialization and
setting global variables (globalJSON, globalQuiet, etc..) can be moved
to the Before function of all commands.
Avoid setting command.Before for non leaf commands, otherwise Before
function will be called multiples times until it reaches the leaf
command.
The compression parameter is not actually used, but always guessed from the file extension.
Only guess the compression type if it is not explicitly set.
Uploading a file called `out.csv.geezipd`:
Before:
```
λ mc sql -e="SELECT * from s3object LIMIT 1" --compression=GZIP --csv-input "rd=\n,fh=USE,fd=;" local/test/out.csv.geezipd
�""���k↔��Xs��W.v� ��)��{2#��,r���:�|D▲�.��f♫��→�i�p�2l�♫��ʭ���Q��v▲�5ر�c
```
(content actually not ungzipped)
After:
```
λ mc sql -e="SELECT * from s3object LIMIT 1" --compression=GZIP --csv-input "rd=\n,fh=USE,fd=;" local/test/out.csv.geezipd
"281,1285,159625,159627,2637,20000827.0117590018,1239029,1663,-6.7535419,1533,0.53597438,8"
```
We leave validation of the compression value to the server.
