Exception when `tput` not found [Document ncurses dependency]

[dhampik]

php:7.4.8-fpm-alpine3.12 docker image does not have ncurses (and thus tput command) installed by default. That causes the following error when running phive:

phive install
PHP Fatal error:  Uncaught PharIo\Phive\EnvironmentException: Command tput not found in phar:///usr/local/bin/phive/src/shared/environment/Environment.php:30
Stack trace:
#0 phar:///usr/local/bin/phive/src/shared/environment/UnixoidEnvironment.php(51): PharIo\Phive\Environment->getPathToCommand('tput')
#1 phar:///usr/local/bin/phive/src/shared/cli/output/OutputLocator.php(16): PharIo\Phive\UnixoidEnvironment->supportsColoredOutput()
#2 phar:///usr/local/bin/phive/src/Factory.php(199): PharIo\Phive\Cli\OutputLocator->getOutput(Object(PharIo\Phive\UnixoidEnvironment), true)
#3 phar:///usr/local/bin/phive/src/Factory.php(32): PharIo\Phive\Factory->getOutput()
#4 /usr/local/bin/phive(349): PharIo\Phive\Factory->getRunner()
#5 {main}
  thrown in phar:///usr/local/bin/phive/src/shared/environment/Environment.php on line 30

Fatal error: Uncaught PharIo\Phive\EnvironmentException: Command tput not found in phar:///usr/local/bin/phive/src/shared/environment/Environment.php on line 30

PharIo\Phive\EnvironmentException: Command tput not found in phar:///usr/local/bin/phive/src/shared/environment/Environment.php on line 30

Call Stack:
    0.0017     457912   1. {main}() /usr/local/bin/phive:0
    0.0112     770048   2. PharIo\Phive\Factory->getRunner() /usr/local/bin/phive:349
    0.0127     823488   3. PharIo\Phive\Factory->getOutput() phar:///usr/local/bin/phive/src/Factory.php:32
    0.0143     868528   4. PharIo\Phive\Cli\OutputLocator->getOutput() phar:///usr/local/bin/phive/src/Factory.php:199
    0.0143     868528   5. PharIo\Phive\UnixoidEnvironment->supportsColoredOutput() phar:///usr/local/bin/phive/src/shared/cli/output/OutputLocator.php:16
    0.0143     868904   6. PharIo\Phive\UnixoidEnvironment->getPathToCommand() phar:///usr/local/bin/phive/src/shared/environment/UnixoidEnvironment.php:51

I actually didn't know about tput command in linux and thought that it's actually a typo and it should be "output" instead, so I had to look into source files to understand what's going on.

There is also dependency on gnupg, but there is a clear output for it:

phive install
Phive 0.14.4 - Copyright (C) 2015-2020 by Arne Blankerts, Sebastian Heuer and Contributors
[ERROR]    No executable gpg binary found.  
[ERROR]     Either install gpg or enable the gnupg extension in PHP. 

Maybe it would be good to document it somewhere (readme?).

[theseer]

We might also provide an alternative / backup implementation, in case tput is not available.

[theseer]

Yes, looking at the code in question the exception certainly should not bubble up like this to begin with. But indeed there should also be alternative means to detect color capabilities.