Update TTY checks #145
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Update TTY checks #145
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The function `stream_isatty()` ([PHP manual](https://www.php.net/manual/en/function.stream-isatty.php)) is available since PHP 7.2.0/8.0. > Determines if stream stream refers to a valid terminal type device. This is a more portable version of posix_isatty(), since it works on Windows systems too. This update also enables the use of an Output stream as an argument without triggering a warning, as in the folowing code. ``` define( 'STDOUT', fopen( 'php://output', 'w' ) ); var_dump(posix_isatty(STDOUT)); var_dump(stream_isatty(STDOUT)); => <b>Warning</b>: posix_isatty(): could not use stream of type 'Output' in <b>/usr/local/var/www/wp-cli/php/boot-fpm.php</b> on line <b>22</b><br /> bool(false) bool(false) ``` It is necessary to define `STDOUT` in this way while using the `fpm-fcgi` SAPI. This is useful when running lots of WP-CLI commands in a high-volume task scheduler where up to 95% of CPU time is wasted on the redundant work of loading PHP code. We found that php-fpm's opcode caching reduces resource usage significantly, idling hundreds of CPUs that are otherwise occupied loading the same code over and over again. The `fpm-fcgi` SAPI runs WP CLI through a modified boot script. A command line program passes commands via an FCGI client and returns results on standard streams. This work will also be contributed to the `wp-cli` project.
schlessera
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Jul 1, 2021
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I notice that spacing is all over the place in this repo, so I'll have to enforce a meaningful CS at some point. But that shouldn't be a blocker for this PR.
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The function isTty() in Streams.php returns wrong information. The function should look like this (in my opinion): The function in Shell.php is correct (as it is also called isPiped()). |
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The function
stream_isatty()(PHP manual) is available since PHP 7.2.0/8.0.This update also enables the use of an Output stream as an argument without triggering a warning, as in the folowing code.
It is necessary to define
STDOUTin this way while using thefpm-fcgiSAPI. This is useful when running lots of WP-CLI commands in a high-volume task scheduler where up to 95% of CPU time is wasted on the redundant work of loading PHP code. We found that php-fpm's opcode caching reduces resource usage significantly, idling hundreds of CPU cores that are otherwise occupied loading the same code over and over again.The
fpm-fcgiSAPI runs WP CLI through a modified boot script. A command line program passes commands via an FCGI client and returns results on standard streams. It is suitable for non-interactive commands. This work will also be contributed to thewp-cliproject.