This commit fixes an issue where a user may provider a nil input via
`tea.WithInput(nil)`. This option method does not check if the input
is nil and sets the `withCustomInput` attribute with a nil input.
This logic is sound since a Tea program may not necessarily want to
handle any inputs from users (such as those in non-TTY environments).
However, a nil pointer exception is thrown during `tea.Run` because a
`cancelReader` is always invoked after the main renderer. However,
its instantiation is variable and dependent on whether an input is
provided. To mitigate against this, this commit checks if a
`cancelReader` is non-nil.
Signed-off-by: Alexander Jung <alex@nderjung.net>
WithContext lets you specify a context in which to run the Program.
This is useful if you want to cancel the execution from outside.
When a Program gets cancelled it will exit with an error
ErrProgramKilled.
Based on @knz's work in #499, but slightly supersedes this change.
A little more coupling in the resize handling, but a lot less code
& logic repetition.
Co-authored-by: Raphael 'kena' Poss <knz@thaumogen.net>
* merge Adjective-Object/tea_log_renderer into standard renderer
* rename queuedMessages -> queuedMessageLines & break apart strings during message processing
* delete cursorDownBy
* += 1 -> ++ to make the linter happy
* add skipLines[] tracking back to standard renderer, and add rename skippedLines local to jumpedLines to clarify they are separate comments
* request repaint when a message is recieved
* Convert Println and Printf to commands
* Add package manager example demonstrating tea.Printf
* Use Unix instead of UnixMicro for Go 1.13 support in CI
* fix off by one in std renderer
* add Printf/Println to tea.go
* revert attempt at sequence compression + cursorUpBy
Co-authored-by: Maxwell Huang-Hobbs <mahuangh@microsoft.com>
Co-authored-by: Christian Rocha <christian@rocha.is>
I didn't realise at the time, but the tea.Program and the renderer share
the mutex. This make the code difficult to reason about - it turns out
the program sometimes acquires the lock and then calls the
`setAltScreen` method of the renderer which in turns calls `repaint`.
That causes a deadlock as `repaint` is trying to acquire the lock too.
* feat: add OSExec helper function for running exec.Cmds
* chore: for now, un-expose WrapExecCommand
* chore: move exec struff into its own file
* chore(exec): better name for Exec func that wraps exec.Cmd (thanks, @toby)
* add: program.ReleaseTerminal and RestoreTerminal to re-use input & terminal
* chore(examples): add altscreen toggling to exec demo
* chore: put low-level altscreen stuff alongside other screen funcs
* docs: edit GoDocs for ReleaseTerminal and RestoreTerminal
* feat(renderer): add internal Msg renderMsg to immediately repaint
* fix: repaint instantly on RestoreTerminal
* fix: restore the altscreen state when restoring the terminal
* feat: implement Cmd-based API for blocking *exec.Cmds
* feat: allow Exec to return custom messages
* feat: allow Exec to be run without a callback
* fix: separate parameters for exec.Command examples
* fix: error message would get printed over by prompt in exec example
* fix: ignore signals while child process is running
* feat: allow to execute other things besides exec.Commands (#280)
* feat: allow to execute other things besides exec.Commands.
* fix: lint issues
* fix: renames, examples
* fix: callback type should be exported
* docs(exce): tiny ExecCommand doc comment correction
* chore(exec): break out Cmd for clarity's sake in example
* fix(exec): give the terminal a moment to catch up if exiting altscreen
* docs(exec): tidy up doc comments
* chore(exec): disambiguate methods for restoring the terminal state vs input
Co-authored-by: Christian Rocha <christian@rocha.is>
Co-authored-by: Carlos A Becker <caarlos0@gmail.com>
Christian Muehlhaeuser
Alexander Jung
Christoffer Åström
Alexander Jung
treilik
Raphael 'kena' Poss
Josh Soref
Leandro López (inkel)
Christian Rocha
Johann Cruz
Maas Lalani
Max
Georgi Dimitrov
Carlos A Becker