Need ncurses for pretty printing to work

[dlorch]

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As the title says. Without ncurses, the output defaults to "TAP", even on an interactive console:

$ docker run -it bats/bats:latest /opt/bats/test
1..78
ok 1 no arguments prints message and usage instructions
ok 2 invalid option prints message and usage instructions
ok 3 -v and --version print version number
ok 4 -h and --help print help
ok 5 invalid filename prints an error
ok 6 empty test file runs zero tests
ok 7 one passing test
ok 8 summary passing tests
...

with ncurses:

$ docker run -it bats/bats:latest /opt/bats/test
 ✓ no arguments prints message and usage instructions
 ✓ invalid option prints message and usage instructions
 ✓ -v and --version print version number
 ✓ -h and --help print help
 ✓ invalid filename prints an error
 ✓ empty test file runs zero tests
 ✓ one passing test
 ✓ summary passing tests
...

Note that -p and --pretty do not work without ncurses.

I don't know if ncurses is actually needed or not, but bats checks for it here:

command -v tput

[sublimino]

Thanks for the contribution @dlorch! 👍

[sublimino]

It occurs to me now this is merged that this is redefining accidental behaviour that CI suites may have been relying on: implicit default in Docker was --tap, it's now --pretty

The fix is to do as in .travis.yml and manually specify the formatter (--tap or --formatter tap):

docker run -it "bats/bats:bash-${BASHVER}" --tap /opt/bats/test

If this will cause anybody problems please LMK here.