Support HHVM 4

v2.1.0

update dependencies

Updated hsl-experimental dependency

This release requires hsl-experimental 3.28.5, as an implementation detail of the terminal input/output handles

Use the hsl-experimental IO interfaces

This release replaces InputInterface and OutputInterface with the hsl-experimental IO interfaces; see https://github.com/hhvm/hsl-experimental/releases/tag/v3.29.2

These are truly non-blocking and async; when specific ordering is required (e.g. for REPLs), this needs to be implemented by the user - for example, this is required when hhast-lint is running interactively: hhvm/hhast@92c989a

async output

This release:

• adds OutputInterface::writeAsync(string): Awaitable<void> that will write the complete provided buffer
• adds OutputInterface::rawWrite(string): int, which returns the number of bytes written
• adds CLIBase::displayHelpAsync(OutputInterface): Awaitable<void> to replace CLIBase::displayHelp

OutputInterface::write() and CLIBase::displayHelp() are still present, but will be removed in a future release.

Support HHVM 3.28

This release:

• adds support for HHVM 3.28

Improving handling of `readLineAsync` when there is an fd event, but not a full ilne

This led to readLineAsync() returning '' when there was no actual input available, but not at EOF.

Fix FileHandlerInput::readLineAsync() when a line is already available

v1.1.0 blocks waiting for more data when it doesn't need more data. This affects reading from STDIN a line at a time.

Add Terminal encapsulation, and `InputInterface` for stdin

This release:

• adds InputInterface, StringInput, FileHandleInput, and CLIBase::getStdIn(); these provide async read support, enabling automated testing of interactive programs
• adds the ITerminal interface and Terminal classes, providing access to supportsColor(), isInteractive(), and standard input/output/error. CLIBase still exposes these via convenience accessors, in addition to getTerminal()

Initial release

This is an initial release of CLILib, a high-level CLI library for Hack.

hh-clilib is derived from the original CLI code for HHAST, and is also in use in several other projects.