Who is eating data? Xargs?
I am trying to parse a recursive directory of PHP files using the built in PHP linter, which works like this:
$ php -l good.php
No syntax errors detected in good.php
$ php -l bad.php
PHP Parse error: syntax error, unexpected ''foo'' (T_CONSTANT_ENCAPSED_STRING), expecting ')' in bad.php on line 3
Errors parsing bad.php
We can see that files which pass linting output a line containing No syntax errors
and those which fail linting output a line containing Errors parsing
.
I see that I have 12147 PHP files recursively in the current directory, however the PHP linter is only outputting seven lines:
$ find . -name *.php -print0 | xargs -0 ls -l | wc -l
12147
$ find . -name *.php -print0 | xargs -0 php -l | wc -l
7
As there were only 7 files parsed by PHP, I can use my head
with ls
to find some files which have not been parsed:
$ find . -name *.php -print0 | xargs -0 ls -l | head
-rw-r--r-- 1 dotan dotan 1927 Jan 13 10:13 ./bootstrap/app.php
-rw-r--r-- 1 dotan dotan 1076 Jan 13 10:13 ./bootstrap/autoload.php
-rw-rw-r-- 1 dotan dotan 25620 Mar 12 12:29 ./bootstrap/cache/services.php
-rw-r--r-- 1 dotan dotan 2493 Jan 13 10:13 ./bootstrap/paths.php
-rwxrwxr-x 1 dotan dotan 20008 Mar 12 12:30 ./config/app.php
-rw-r--r-- 1 dotan dotan 3304 Jan 13 10:13 ./config/auth.php
-rw-r--r-- 1 dotan dotan 1819 Jan 13 10:13 ./config/cache.php
-rw-r--r-- 1 dotan dotan 3751 Jan 13 10:13 ./config/cartalyst.sentinel-addons.social.php
-rw-r--r-- 1 dotan dotan 6849 Jan 13 10:13 ./config/cartalyst.sentinel.php
-rw-r--r-- 1 dotan dotan 1020 Jan 13 10:13 ./config/compile.php
xargs: ls: terminated by signal 13
$ find . -name *.php -print0 | xargs -0 php -l
No syntax errors detected in ./bootstrap/paths.php
No syntax errors detected in ./vendor/watson/validating/src/ValidatingTrait.php
No syntax errors detected in ./vendor/giggsey/libphonenumber-for-php/src/libphonenumber/data/PhoneNumberMetadata_SI.php
No syntax errors detected in ./vendor/php-vcr/php-vcr/src/VCR/Event/BeforePlaybackEvent.php
No syntax errors detected in ./vendor/laravel/framework/src/Illuminate/Support/Facades/Blade.php
No syntax errors detected in ./resources/views/emails/appointment/updated/body.blade.php
No syntax errors detected in ./app/WL/Modules/Location/Commands/RemoveClientLocationCommand.php
Yet, when I try to parse one of those files I see that it does produce the expected output (either passing or failing parsing):
$ php -l ./bootstrap/cache/services.php
No syntax errors detected in ./bootstrap/cache/services.php
I've checked that neither passing nor failing linting is printing the expected lines to stderr:
$ php -l good.php | grep rr
No syntax errors detected in good.php
$ php -l bad.php | grep rr
PHP Parse error: syntax error, unexpected ''foo'' (T_CONSTANT_ENCAPSED_STRING), expecting ')' in bad.php on line 3
Errors parsing bad.php
What should I check now? My end goal is to lint all the files, then grep for Error parsing
to fix those issues.
bash shell php xargs debugging
add a comment |
I am trying to parse a recursive directory of PHP files using the built in PHP linter, which works like this:
$ php -l good.php
No syntax errors detected in good.php
$ php -l bad.php
PHP Parse error: syntax error, unexpected ''foo'' (T_CONSTANT_ENCAPSED_STRING), expecting ')' in bad.php on line 3
Errors parsing bad.php
We can see that files which pass linting output a line containing No syntax errors
and those which fail linting output a line containing Errors parsing
.
I see that I have 12147 PHP files recursively in the current directory, however the PHP linter is only outputting seven lines:
$ find . -name *.php -print0 | xargs -0 ls -l | wc -l
12147
$ find . -name *.php -print0 | xargs -0 php -l | wc -l
7
As there were only 7 files parsed by PHP, I can use my head
with ls
to find some files which have not been parsed:
$ find . -name *.php -print0 | xargs -0 ls -l | head
-rw-r--r-- 1 dotan dotan 1927 Jan 13 10:13 ./bootstrap/app.php
-rw-r--r-- 1 dotan dotan 1076 Jan 13 10:13 ./bootstrap/autoload.php
-rw-rw-r-- 1 dotan dotan 25620 Mar 12 12:29 ./bootstrap/cache/services.php
-rw-r--r-- 1 dotan dotan 2493 Jan 13 10:13 ./bootstrap/paths.php
-rwxrwxr-x 1 dotan dotan 20008 Mar 12 12:30 ./config/app.php
-rw-r--r-- 1 dotan dotan 3304 Jan 13 10:13 ./config/auth.php
-rw-r--r-- 1 dotan dotan 1819 Jan 13 10:13 ./config/cache.php
-rw-r--r-- 1 dotan dotan 3751 Jan 13 10:13 ./config/cartalyst.sentinel-addons.social.php
-rw-r--r-- 1 dotan dotan 6849 Jan 13 10:13 ./config/cartalyst.sentinel.php
-rw-r--r-- 1 dotan dotan 1020 Jan 13 10:13 ./config/compile.php
xargs: ls: terminated by signal 13
$ find . -name *.php -print0 | xargs -0 php -l
No syntax errors detected in ./bootstrap/paths.php
No syntax errors detected in ./vendor/watson/validating/src/ValidatingTrait.php
No syntax errors detected in ./vendor/giggsey/libphonenumber-for-php/src/libphonenumber/data/PhoneNumberMetadata_SI.php
No syntax errors detected in ./vendor/php-vcr/php-vcr/src/VCR/Event/BeforePlaybackEvent.php
No syntax errors detected in ./vendor/laravel/framework/src/Illuminate/Support/Facades/Blade.php
No syntax errors detected in ./resources/views/emails/appointment/updated/body.blade.php
No syntax errors detected in ./app/WL/Modules/Location/Commands/RemoveClientLocationCommand.php
Yet, when I try to parse one of those files I see that it does produce the expected output (either passing or failing parsing):
$ php -l ./bootstrap/cache/services.php
No syntax errors detected in ./bootstrap/cache/services.php
I've checked that neither passing nor failing linting is printing the expected lines to stderr:
$ php -l good.php | grep rr
No syntax errors detected in good.php
$ php -l bad.php | grep rr
PHP Parse error: syntax error, unexpected ''foo'' (T_CONSTANT_ENCAPSED_STRING), expecting ')' in bad.php on line 3
Errors parsing bad.php
What should I check now? My end goal is to lint all the files, then grep for Error parsing
to fix those issues.
bash shell php xargs debugging
1
Can thephp -l
command take multiple arguments with the syntaxphp -l file1 file2 file3
?xargs
would be passing the results offind
in batches.
– Haxiel
12 hours ago
@Haxiel: Thank you, in factxargs
was batching. Learn something every day!
– dotancohen
11 hours ago
add a comment |
I am trying to parse a recursive directory of PHP files using the built in PHP linter, which works like this:
$ php -l good.php
No syntax errors detected in good.php
$ php -l bad.php
PHP Parse error: syntax error, unexpected ''foo'' (T_CONSTANT_ENCAPSED_STRING), expecting ')' in bad.php on line 3
Errors parsing bad.php
We can see that files which pass linting output a line containing No syntax errors
and those which fail linting output a line containing Errors parsing
.
I see that I have 12147 PHP files recursively in the current directory, however the PHP linter is only outputting seven lines:
$ find . -name *.php -print0 | xargs -0 ls -l | wc -l
12147
$ find . -name *.php -print0 | xargs -0 php -l | wc -l
7
As there were only 7 files parsed by PHP, I can use my head
with ls
to find some files which have not been parsed:
$ find . -name *.php -print0 | xargs -0 ls -l | head
-rw-r--r-- 1 dotan dotan 1927 Jan 13 10:13 ./bootstrap/app.php
-rw-r--r-- 1 dotan dotan 1076 Jan 13 10:13 ./bootstrap/autoload.php
-rw-rw-r-- 1 dotan dotan 25620 Mar 12 12:29 ./bootstrap/cache/services.php
-rw-r--r-- 1 dotan dotan 2493 Jan 13 10:13 ./bootstrap/paths.php
-rwxrwxr-x 1 dotan dotan 20008 Mar 12 12:30 ./config/app.php
-rw-r--r-- 1 dotan dotan 3304 Jan 13 10:13 ./config/auth.php
-rw-r--r-- 1 dotan dotan 1819 Jan 13 10:13 ./config/cache.php
-rw-r--r-- 1 dotan dotan 3751 Jan 13 10:13 ./config/cartalyst.sentinel-addons.social.php
-rw-r--r-- 1 dotan dotan 6849 Jan 13 10:13 ./config/cartalyst.sentinel.php
-rw-r--r-- 1 dotan dotan 1020 Jan 13 10:13 ./config/compile.php
xargs: ls: terminated by signal 13
$ find . -name *.php -print0 | xargs -0 php -l
No syntax errors detected in ./bootstrap/paths.php
No syntax errors detected in ./vendor/watson/validating/src/ValidatingTrait.php
No syntax errors detected in ./vendor/giggsey/libphonenumber-for-php/src/libphonenumber/data/PhoneNumberMetadata_SI.php
No syntax errors detected in ./vendor/php-vcr/php-vcr/src/VCR/Event/BeforePlaybackEvent.php
No syntax errors detected in ./vendor/laravel/framework/src/Illuminate/Support/Facades/Blade.php
No syntax errors detected in ./resources/views/emails/appointment/updated/body.blade.php
No syntax errors detected in ./app/WL/Modules/Location/Commands/RemoveClientLocationCommand.php
Yet, when I try to parse one of those files I see that it does produce the expected output (either passing or failing parsing):
$ php -l ./bootstrap/cache/services.php
No syntax errors detected in ./bootstrap/cache/services.php
I've checked that neither passing nor failing linting is printing the expected lines to stderr:
$ php -l good.php | grep rr
No syntax errors detected in good.php
$ php -l bad.php | grep rr
PHP Parse error: syntax error, unexpected ''foo'' (T_CONSTANT_ENCAPSED_STRING), expecting ')' in bad.php on line 3
Errors parsing bad.php
What should I check now? My end goal is to lint all the files, then grep for Error parsing
to fix those issues.
bash shell php xargs debugging
I am trying to parse a recursive directory of PHP files using the built in PHP linter, which works like this:
$ php -l good.php
No syntax errors detected in good.php
$ php -l bad.php
PHP Parse error: syntax error, unexpected ''foo'' (T_CONSTANT_ENCAPSED_STRING), expecting ')' in bad.php on line 3
Errors parsing bad.php
We can see that files which pass linting output a line containing No syntax errors
and those which fail linting output a line containing Errors parsing
.
I see that I have 12147 PHP files recursively in the current directory, however the PHP linter is only outputting seven lines:
$ find . -name *.php -print0 | xargs -0 ls -l | wc -l
12147
$ find . -name *.php -print0 | xargs -0 php -l | wc -l
7
As there were only 7 files parsed by PHP, I can use my head
with ls
to find some files which have not been parsed:
$ find . -name *.php -print0 | xargs -0 ls -l | head
-rw-r--r-- 1 dotan dotan 1927 Jan 13 10:13 ./bootstrap/app.php
-rw-r--r-- 1 dotan dotan 1076 Jan 13 10:13 ./bootstrap/autoload.php
-rw-rw-r-- 1 dotan dotan 25620 Mar 12 12:29 ./bootstrap/cache/services.php
-rw-r--r-- 1 dotan dotan 2493 Jan 13 10:13 ./bootstrap/paths.php
-rwxrwxr-x 1 dotan dotan 20008 Mar 12 12:30 ./config/app.php
-rw-r--r-- 1 dotan dotan 3304 Jan 13 10:13 ./config/auth.php
-rw-r--r-- 1 dotan dotan 1819 Jan 13 10:13 ./config/cache.php
-rw-r--r-- 1 dotan dotan 3751 Jan 13 10:13 ./config/cartalyst.sentinel-addons.social.php
-rw-r--r-- 1 dotan dotan 6849 Jan 13 10:13 ./config/cartalyst.sentinel.php
-rw-r--r-- 1 dotan dotan 1020 Jan 13 10:13 ./config/compile.php
xargs: ls: terminated by signal 13
$ find . -name *.php -print0 | xargs -0 php -l
No syntax errors detected in ./bootstrap/paths.php
No syntax errors detected in ./vendor/watson/validating/src/ValidatingTrait.php
No syntax errors detected in ./vendor/giggsey/libphonenumber-for-php/src/libphonenumber/data/PhoneNumberMetadata_SI.php
No syntax errors detected in ./vendor/php-vcr/php-vcr/src/VCR/Event/BeforePlaybackEvent.php
No syntax errors detected in ./vendor/laravel/framework/src/Illuminate/Support/Facades/Blade.php
No syntax errors detected in ./resources/views/emails/appointment/updated/body.blade.php
No syntax errors detected in ./app/WL/Modules/Location/Commands/RemoveClientLocationCommand.php
Yet, when I try to parse one of those files I see that it does produce the expected output (either passing or failing parsing):
$ php -l ./bootstrap/cache/services.php
No syntax errors detected in ./bootstrap/cache/services.php
I've checked that neither passing nor failing linting is printing the expected lines to stderr:
$ php -l good.php | grep rr
No syntax errors detected in good.php
$ php -l bad.php | grep rr
PHP Parse error: syntax error, unexpected ''foo'' (T_CONSTANT_ENCAPSED_STRING), expecting ')' in bad.php on line 3
Errors parsing bad.php
What should I check now? My end goal is to lint all the files, then grep for Error parsing
to fix those issues.
bash shell php xargs debugging
bash shell php xargs debugging
asked 12 hours ago
dotancohendotancohen
6,423195996
6,423195996
1
Can thephp -l
command take multiple arguments with the syntaxphp -l file1 file2 file3
?xargs
would be passing the results offind
in batches.
– Haxiel
12 hours ago
@Haxiel: Thank you, in factxargs
was batching. Learn something every day!
– dotancohen
11 hours ago
add a comment |
1
Can thephp -l
command take multiple arguments with the syntaxphp -l file1 file2 file3
?xargs
would be passing the results offind
in batches.
– Haxiel
12 hours ago
@Haxiel: Thank you, in factxargs
was batching. Learn something every day!
– dotancohen
11 hours ago
1
1
Can the
php -l
command take multiple arguments with the syntax php -l file1 file2 file3
? xargs
would be passing the results of find
in batches.– Haxiel
12 hours ago
Can the
php -l
command take multiple arguments with the syntax php -l file1 file2 file3
? xargs
would be passing the results of find
in batches.– Haxiel
12 hours ago
@Haxiel: Thank you, in fact
xargs
was batching. Learn something every day!– dotancohen
11 hours ago
@Haxiel: Thank you, in fact
xargs
was batching. Learn something every day!– dotancohen
11 hours ago
add a comment |
1 Answer
1
active
oldest
votes
To see whether xargs makes a difference, run the command lines that it runs. Here are a couple of ways to see exactly what it runs, while not risking changing what it runs:
- Write a script called
php
in a temporary directory and put it at the beginning of$PATH
. In this script, log the arguments (and optionally run the realphp
afterwards). - Run the whole command line under a logging mechanism such as
strace
.
You will find that the command is something like
php -l ./bootstrap/app.php ./bootstrap/autoload.php ./bootstrap/cache/services.php …
The next step is to investigate what this command does.
I'm not familiar with php
but I guess it only treats the first file name as a PHP script name, and that in lint mode it simply ignores all subsequent arguments. So you need to run php -l
once for each script, 12147 times in total, instead of using xargs
's grouping behavior.
The easiest way to do that is
find . -name *.php -exec php -l {} ;
but this command will always return 0 even if some invocations of php
return a nonzero status. While find mostly doesn't need xargs in the 21st century, a benefit of xargs is that it returns a nonzero status if any invocation of the command returns a nonzero status. So run xargs, but tell it to only process one file at a time with the -n
option.
find . -name *.php -print0 | xargs -0 -n 1 php -l
As usual, you've hit the nail right on the head.xargs
was batching the arguments, and the-n 1
flag was the right solution. In fact I was using-exec
to continue working while this question was being resolved, but I preferxargs
as I feel it is a more flexible solution. Thank you.
– dotancohen
12 hours ago
add a comment |
Your Answer
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1 Answer
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active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
To see whether xargs makes a difference, run the command lines that it runs. Here are a couple of ways to see exactly what it runs, while not risking changing what it runs:
- Write a script called
php
in a temporary directory and put it at the beginning of$PATH
. In this script, log the arguments (and optionally run the realphp
afterwards). - Run the whole command line under a logging mechanism such as
strace
.
You will find that the command is something like
php -l ./bootstrap/app.php ./bootstrap/autoload.php ./bootstrap/cache/services.php …
The next step is to investigate what this command does.
I'm not familiar with php
but I guess it only treats the first file name as a PHP script name, and that in lint mode it simply ignores all subsequent arguments. So you need to run php -l
once for each script, 12147 times in total, instead of using xargs
's grouping behavior.
The easiest way to do that is
find . -name *.php -exec php -l {} ;
but this command will always return 0 even if some invocations of php
return a nonzero status. While find mostly doesn't need xargs in the 21st century, a benefit of xargs is that it returns a nonzero status if any invocation of the command returns a nonzero status. So run xargs, but tell it to only process one file at a time with the -n
option.
find . -name *.php -print0 | xargs -0 -n 1 php -l
As usual, you've hit the nail right on the head.xargs
was batching the arguments, and the-n 1
flag was the right solution. In fact I was using-exec
to continue working while this question was being resolved, but I preferxargs
as I feel it is a more flexible solution. Thank you.
– dotancohen
12 hours ago
add a comment |
To see whether xargs makes a difference, run the command lines that it runs. Here are a couple of ways to see exactly what it runs, while not risking changing what it runs:
- Write a script called
php
in a temporary directory and put it at the beginning of$PATH
. In this script, log the arguments (and optionally run the realphp
afterwards). - Run the whole command line under a logging mechanism such as
strace
.
You will find that the command is something like
php -l ./bootstrap/app.php ./bootstrap/autoload.php ./bootstrap/cache/services.php …
The next step is to investigate what this command does.
I'm not familiar with php
but I guess it only treats the first file name as a PHP script name, and that in lint mode it simply ignores all subsequent arguments. So you need to run php -l
once for each script, 12147 times in total, instead of using xargs
's grouping behavior.
The easiest way to do that is
find . -name *.php -exec php -l {} ;
but this command will always return 0 even if some invocations of php
return a nonzero status. While find mostly doesn't need xargs in the 21st century, a benefit of xargs is that it returns a nonzero status if any invocation of the command returns a nonzero status. So run xargs, but tell it to only process one file at a time with the -n
option.
find . -name *.php -print0 | xargs -0 -n 1 php -l
As usual, you've hit the nail right on the head.xargs
was batching the arguments, and the-n 1
flag was the right solution. In fact I was using-exec
to continue working while this question was being resolved, but I preferxargs
as I feel it is a more flexible solution. Thank you.
– dotancohen
12 hours ago
add a comment |
To see whether xargs makes a difference, run the command lines that it runs. Here are a couple of ways to see exactly what it runs, while not risking changing what it runs:
- Write a script called
php
in a temporary directory and put it at the beginning of$PATH
. In this script, log the arguments (and optionally run the realphp
afterwards). - Run the whole command line under a logging mechanism such as
strace
.
You will find that the command is something like
php -l ./bootstrap/app.php ./bootstrap/autoload.php ./bootstrap/cache/services.php …
The next step is to investigate what this command does.
I'm not familiar with php
but I guess it only treats the first file name as a PHP script name, and that in lint mode it simply ignores all subsequent arguments. So you need to run php -l
once for each script, 12147 times in total, instead of using xargs
's grouping behavior.
The easiest way to do that is
find . -name *.php -exec php -l {} ;
but this command will always return 0 even if some invocations of php
return a nonzero status. While find mostly doesn't need xargs in the 21st century, a benefit of xargs is that it returns a nonzero status if any invocation of the command returns a nonzero status. So run xargs, but tell it to only process one file at a time with the -n
option.
find . -name *.php -print0 | xargs -0 -n 1 php -l
To see whether xargs makes a difference, run the command lines that it runs. Here are a couple of ways to see exactly what it runs, while not risking changing what it runs:
- Write a script called
php
in a temporary directory and put it at the beginning of$PATH
. In this script, log the arguments (and optionally run the realphp
afterwards). - Run the whole command line under a logging mechanism such as
strace
.
You will find that the command is something like
php -l ./bootstrap/app.php ./bootstrap/autoload.php ./bootstrap/cache/services.php …
The next step is to investigate what this command does.
I'm not familiar with php
but I guess it only treats the first file name as a PHP script name, and that in lint mode it simply ignores all subsequent arguments. So you need to run php -l
once for each script, 12147 times in total, instead of using xargs
's grouping behavior.
The easiest way to do that is
find . -name *.php -exec php -l {} ;
but this command will always return 0 even if some invocations of php
return a nonzero status. While find mostly doesn't need xargs in the 21st century, a benefit of xargs is that it returns a nonzero status if any invocation of the command returns a nonzero status. So run xargs, but tell it to only process one file at a time with the -n
option.
find . -name *.php -print0 | xargs -0 -n 1 php -l
answered 12 hours ago
GillesGilles
542k12810961615
542k12810961615
As usual, you've hit the nail right on the head.xargs
was batching the arguments, and the-n 1
flag was the right solution. In fact I was using-exec
to continue working while this question was being resolved, but I preferxargs
as I feel it is a more flexible solution. Thank you.
– dotancohen
12 hours ago
add a comment |
As usual, you've hit the nail right on the head.xargs
was batching the arguments, and the-n 1
flag was the right solution. In fact I was using-exec
to continue working while this question was being resolved, but I preferxargs
as I feel it is a more flexible solution. Thank you.
– dotancohen
12 hours ago
As usual, you've hit the nail right on the head.
xargs
was batching the arguments, and the -n 1
flag was the right solution. In fact I was using -exec
to continue working while this question was being resolved, but I prefer xargs
as I feel it is a more flexible solution. Thank you.– dotancohen
12 hours ago
As usual, you've hit the nail right on the head.
xargs
was batching the arguments, and the -n 1
flag was the right solution. In fact I was using -exec
to continue working while this question was being resolved, but I prefer xargs
as I feel it is a more flexible solution. Thank you.– dotancohen
12 hours ago
add a comment |
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1
Can the
php -l
command take multiple arguments with the syntaxphp -l file1 file2 file3
?xargs
would be passing the results offind
in batches.– Haxiel
12 hours ago
@Haxiel: Thank you, in fact
xargs
was batching. Learn something every day!– dotancohen
11 hours ago