avoid output when tput is missing. fixes #5

Author: splitbrain

src/TableFormatter.php

@@ -29,15 +29,7 @@ class TableFormatter
  public function __construct(Colors $colors = null)
  {
  // try to get terminal width
- $width = 0;
- if (isset($_SERVER['COLUMNS'])) {
- // from environment
- $width = (int)$_SERVER['COLUMNS'];
- }
- if (!$width) {
- // via tput command
- $width = @exec('tput cols');
- }
+ $width = $this->getTerminalWidth();
  if ($width) {
  $this->max = $width - 1;
  }
@@ -92,6 +84,27 @@ public function setMaxWidth($max)
  $this->max = $max;
  }
 
+ /**
+ * Tries to figure out the width of the terminal
+ *
+ * @return int terminal width, 0 if unknown
+ */
+ protected function getTerminalWidth()
+ {
+ // from environment
+ if (isset($_SERVER['COLUMNS'])) return (int)$_SERVER['COLUMNS'];
+
+ // via tput
+ $process = proc_open('tput cols', array(
+ 1 => array('pipe', 'w'),
+ 2 => array('pipe', 'w'),
+ ), $pipes);
+ $width = (int)stream_get_contents($pipes[1]);
+ proc_close($process);
+
+ return $width;
+ }
+
  /**
  * Takes an array with dynamic column width and calculates the correct width
  *