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Welcome to the main channel on the development of MoarVM, a virtual machine for NQP and Rakudo (moarvm.org). This channel is being logged for historical purposes. Set by lizmat on 24 May 2021. |
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| lizmat | so, do we have a way to re-open STDIN when procing out? | 19:29 | |
| case in point: | |||
| raku -e '$*IN.slurp; run "vim" < foo | 19:30 | ||
| raku -e '$*IN.slurp; run "vim"' < foo | |||
| I either get: Vim: Warning: Input is not from a terminal and a delay of ~ 2 seconds and "mouse droppings" in my terminal | 19:31 | ||
| or, if I close $*IN, I get: | |||
| The spawned command 'vim' exited unsuccessfully (exit code: 1, signal: 0) | 19:32 | ||
| japhb | Well, if you are redirecting from a file, it is indeed not a terminal. | ||
| I suppose you could dry reopening on '/dev/tty', which should be the controlling terminal on Posix systems | 19:33 | ||
| *could try | |||
| lizmat | that'd be hardly portable.. :-) | ||
| but it indeed does the right thing! | 19:34 | ||
| japhb | lizmat: Portable to all the platforms that matter *cough*. ;-) | 19:36 | |
| But seriously, it should even work under WSL2. | |||
| lizmat | ok, then I'll use that for now | ||
| the idea being that you can: | 19:37 | ||
| raku foo.raku 2> 2(rak --backtrace --edit) | |||
| raku foo.raku 2> >(rak --backtrace --edit) | |||
| to run a raku script, and then be able to edit all the source locations of the stack trace | 19:38 | ||
| japhb | ah yeah, makes sense | 19:39 | |
| lizmat | I sorta thought nqp::getstdin would do the right thing, but it doesn't seem to | 19:44 | |
| japhb | Well as far as its concerned, stdin is the redirect ... it's not paying attention to controlling terminal at that point. | 19:47 | |
| (/dev/tty wasn't just a random hack -- that's apparently how you're Supposed To Do That) | 19:48 | ||
| nine | Well, /dev/tty is only correct if STDIN was connected to the terminal before. If it was a pipe or a file, you'd still be off. The correct way is to dup() the file descriptor before closing it and later dup2() it back to STDIN | 20:24 | |
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| japhb | nine: /dev/tty is, to my understanding, how you recover the controlling terminal when STDIN was connected to a pipe or file outside of your program's control. | 21:43 | |
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| MasterDuke | any thoughts on github.com/MoarVM/MoarVM/pull/1723 ? | 23:51 | |
| japhb | MasterDuke: First, it's somewhat annoying how many files have to change just to replace a deprecated op with a live one. :-P Second, does libuv have any way to set *just one* of uid and gid, leaving the other unchanged? Read-update-write for chown seems like a race condition .... | 23:57 | |