SASS编译器无法从exec运行

Question

In a CentOS container, I am trying to get the SASS to execute from PHP's exec(). SASS is executable, I can execute the command successfully from inside the container manually, but not from the PHP.

Command I am trying is:

PHP

$command = '/usr/local/bin/sass ' . $webFolderPath . '/styles/style_303.scss' . ' ' . $webFolderPath . '/styles/style_303.css';
$command .= " 2>&1";
echo $command;
exec($command, $output, $return);

Translates to:

/usr/local/bin/sass /var/www/html/portal/web/styles/style_303.scss /var/www/html/portal/web/styles/style_303.css 2>&1

I get the following error.

/usr/share/rubygems/rubygems/path_support.rb:68:in `path=': undefined method `+' for nil:NilClass (NoMethodError)
    from /usr/share/rubygems/rubygems/path_support.rb:30:in `initialize'
    from /usr/share/rubygems/rubygems.rb:357:in `new'
    from /usr/share/rubygems/rubygems.rb:357:in `paths'
    from /usr/share/rubygems/rubygems.rb:379:in `path'
    from /usr/share/rubygems/rubygems/specification.rb:794:in `dirs'
    from /usr/share/rubygems/rubygems/specification.rb:658:in `each_normal'
    from /usr/share/rubygems/rubygems/specification.rb:669:in `_all'
    from /usr/share/rubygems/rubygems/specification.rb:822:in `each'
    from /usr/share/rubygems/rubygems/specification.rb:864:in `find'
    from /usr/share/rubygems/rubygems/specification.rb:864:in `find_inactive_by_path'
    from /usr/share/rubygems/rubygems.rb:175:in `try_activate'
    from /usr/share/rubygems/rubygems/core_ext/kernel_require.rb:132:in `rescue in require'
    from /usr/share/rubygems/rubygems/core_ext/kernel_require.rb:144:in `require'
    from <internal:abrt_prelude>:2:in `<compiled>'

Versions:

Sass: 3.5.4 (Bleeding Edge)

Ruby: 2.0.0p648 (2015-12-16) [x86_64-linux]

Gem: 2.0.14.1

CentOS: 7

Any idea, if I am missing something?

Answer 1

Ok, I manage to figure the problem out. The sass requires a home directory to operate correctly. If you are executing PHP as a system user, which in my case it was, it does not have a home directory, that is why it failed.

On Linux, you can use mkhomedir_helper [user] to create a home directory. Once you have created a home directory, sass will start to work.