8000 [Console] add support for catching `\Throwable` errors by lyrixx · Pull Request #50420 · symfony/symfony · GitHub
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[Console] add support for catching \Throwable errors #50420

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Merged
merged 1 commit into from
Jul 10, 2023
Merged

[Console] add support for catching \Throwable errors #50420

merged 1 commit into from
Jul 10, 2023

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lyrixx
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@lyrixx lyrixx commented May 24, 2023
Q A
Branch? 6.4
Bug fix? no
New feature? yes
Deprecations? no
Tickets Fix #46596
License MIT
Doc PR

@lyrixx lyrixx requested a review from chalasr as a code owner May 24, 2023 17:12
@carsonbot carsonbot added this to the 6.4 milestone May 24, 2023
@ghost
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ghost commented May 24, 2023

Historical question: were all the try..catch blocks in the Symfony code base modified from \Exception to \Throwable after the latter had been introduced? I can still see blocks that catch \Exception and I wonder if this is just an oversight or there is a reason behind this.

maxbeckers
maxbeckers approved these changes May 31, 2023
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LGTM

chalasr
chalasr requested changes Jun 5, 2023
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The broken test covers the behavior for which we cannot just do this unfortunately. Check #22690 for background (tldr errors must keep reaching custom error handlers).

8000
@lyrixx
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lyrixx commented Jun 5, 2023

Hmm, When using the component directly without the error handler, a command can crash badly :/

What about adding a flag to choose if we should handle throwable or not?

@chalasr
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chalasr commented Jun 5, 2023

Sounds like a good idea 👍

@nicolas-grekas
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The very lines before the try/catch setup a global error/exception handler, why does this crash badly as you write, while we have this in place?

@lyrixx
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lyrixx commented Jun 5, 2023

@nicolas-grekas let's say you are building a project that run commands, when someone makes an error in the command, it will produces theses outputs:

Without this patch:

>/tmp/foobar foobar  hello
PHP Fatal error:  Uncaught Error: Call to undefined function hello2() in /tmp/foobar/foobar.php:9
Stack trace:
#0 [internal function]: hello()
#1 /home/gregoire/dev/github.com/jolicode/foobar/src/Console/Command/TaskCommand.php(152): ReflectionFunction->invoke()
#2 /home/gregoire/dev/github.com/jolicode/foobar/vendor/symfony/console/Command/Command.php(326): Foobar\Console\Command\TaskCommand->execute()
#3 /home/gregoire/dev/github.com/jolicode/foobar/vendor/symfony/console/Application.php(1063): Symfony\Component\Console\Command\Command->run()
#4 /home/gregoire/dev/github.com/jolicode/foobar/src/Console/Application.php(57): Symfony\Component\Console\Application->doRunCommand()
#5 /home/gregoire/dev/github.com/jolicode/foobar/vendor/symfony/console/Application.php(320): Foobar\Console\Application->doRunCommand()
#6 /home/gregoire/dev/github.com/jolicode/foobar/src/Console/Application.php(45): Symfony\Component\Console\Application->doRun()
#7 /home/gregoire/dev/github.com/jolicode/foobar/vendor/symfony/console/Application.php(174): Foobar\Console\Application->doRun()
#8 /home/gregoire/dev/github.com/jolicode/foobar/src/Console/ApplicationFactory.php(28): Symfony\Component\Console\Application->run()
#9 /home/gregoire/dev/github.com/jolicode/foobar/bin/foobar(14): Foobar\Console\ApplicationFactory::run()
#10 {main}
  thrown in /tmp/foobar/foobar.php on line 9

Fatal error: Uncaught Error: Call to undefined function hello2() in /tmp/foobar/foobar.php:9
Stack trace:
#0 [internal function]: hello()
#1 /home/gregoire/dev/github.com/jolicode/foobar/src/Console/Command/TaskCommand.php(152): ReflectionFunction->invoke()
#2 /home/gregoire/dev/github.com/jolicode/foobar/vendor/symfony/console/Command/Command.php(326): Foobar\Console\Command\TaskCommand->execute()
#3 /home/gregoire/dev/github.com/jolicode/foobar/vendor/symfony/console/Application.php(1063): Symfony\Component\Console\Command\Command->run()
#4 /home/gregoire/dev/github.com/jolicode/foobar/src/Console/Application.php(57): Symfony\Component\Console\Application->doRunCommand()
#5 /home/gregoire/dev/github.com/jolicode/foobar/vendor/symfony/console/Application.php(320): Foobar\Console\Application->doRunCommand()
#6 /home/gregoire/dev/github.com/jolicode/foobar/src/Console/Application.php(45): Symfony\Component\Console\Application->doRun()
#7 /home/gregoire/dev/github.com/jolicode/foobar/vendor/symfony/console/Application.php(174): Foobar\Console\Application->doRun()
#8 /home/gregoire/dev/github.com/jolicode/foobar/src/Console/ApplicationFactory.php(28): Symfony\Component\Console\Application->run()
#9 /home/gregoire/dev/github.com/jolicode/foobar/bin/foobar(14): Foobar\Console\ApplicationFactory::run()
#10 {main}
  thrown in /tmp/foobar/foobar.php on line 9

With this patch (there is color, and Symfony styling):

>/tmp/foobar foobar  hello

In foobar.php line 9:
                                       
  Call to undefined function hello2()  
                                       

hello

And if the developer wants more output, they can run the same command with -v flags

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lyrixx commented Jun 5, 2023 •
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Very simple reproducer :

take only symfony/console, then run:

<?php

require __DIR__.'/vendor/autoload.php';

use Symfony\Component\Console\SingleCommandApplication;

(new SingleCommandApplication())
    ->setCode(function () {
        echo "AAA";
        foobar();
    })
    ->run()
;

@lyrixx lyrixx force-pushed the console-handle-throwable branch from aeac386 to 83417ea Compare July 7, 2023 11:21
@lyrixx
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lyrixx commented Jul 7, 2023 •
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I have rebased the PR, restored BC, added a new flag to handle errors, and added some tests.

I think it's ready ✅

@lyrixx lyrixx force-pushed the console-handle-throwable branch from 83417ea to 8fc6dd2 Compare July 7, 2023 11:54
@lyrixx lyrixx changed the title [Console] The application also catch \Throwable exceptions [Console] add support for catching \Throwable errors Jul 7, 2023
@lyrixx lyrixx force-pushed the console-handle-throwable branch from 8fc6dd2 to 0c2552e Compare July 10, 2023 08:00
@lyrixx lyrixx force-pushed the console-handle-throwable branch from 0c2552e to 7a35645 Compare July 10, 2023 08:05
@lyrixx lyrixx force-pushed the console-handle-throwable branch from 7a35645 to 1baeb3d Compare July 10, 2023 11:49
@chalasr
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chalasr commented Jul 10, 2023

Thank you @lyrixx.

@chalasr
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chalasr commented Jul 10, 2023

@Seldaek FYI

@chalasr chalasr merged commit 43066ff into symfony:6.4 Jul 10, 2023
@lyrixx lyrixx deleted the console-handle-throwable branch July 10, 2023 18:48
Seldaek added a commit to composer/composer that referenced this pull request Jul 28, 2023
@Seldaek
Add support for Application::setCatchErrors in symfony 6.4+, refs sym…
f4738d9 
…fony/symfony#50420
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Seldaek commented Jul 28, 2023

@chalasr thanks for the ping, see composer/composer@f4738d97b (I guess that's why you pinged me :)

This was referenced Oct 21, 2023
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@llupa llupa mentioned this pull request Feb 22, 2024
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@GromNaN GromNaN GromNaN approved these changes

@derrabus derrabus derrabus approved these changes

@chalasr chalasr chalasr approved these changes

@maxbeckers maxbeckers maxbeckers approved these changes

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No catch Throwable errors
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@lyrixx @chalasr @nicolas-grekas @Seldaek @GromNaN @derrabus @maxbeckers @carsonbot
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