Handle path translation for calling windows executables from WSL

launch.php

#!/usr/bin/php
<?php

// In php first element of $argv is the path to the current script.
$a = $argv;

if(count($a) === 2) {
  // Single argument. Just launch it.
  shell_exec($a[1]);
}
elseif(count($a) > 2) {
  $cmd = $a[1];
  array_splice($a, 0, 2);

  for($i = 0; $i < count($a); $i++) {
    $value = $a[$i];

    if (strpos($value, '/') > -1) {
      // Do path transalation
      // If it doesn't start with a /, convert to full path
      if ($value[0] != '/') {
        $real = realpath($value);
        if ($real) {
          $value = $real;
        }
      }

      // We now have the full path. Run wsl on it.
      $path = shell_exec("wslpath -w $value");
      if ($path) {
        // Escape slashes
        $value = str_replace('\\', '\\\\', $path);
      }
    }

    $a[$i] = $value;
  }

  $args = implode(' ', $a);
  shell_exec("$cmd $args");
}

Converts WSL paths to Windows paths which makes it easier to launch windows executables from wsl. For example, for VS Code I could add a code function into my bashrc:

function code {
  launch.php code $@
}

...and now I can type code ~/code/somefile rather than code $(wslpath -w ~/code/somefile)