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Add more robust color support detection in CLI

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This commit is contained in:
John Paul E. Balandan, CPA 2020-06-25 01:12:46 +08:00
parent e9de841818
commit 1c4b4efa23
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GPG Key ID: 6E704127704E21D4
1 changed files with 71 additions and 5 deletions
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76
system/CLI/CLI.php
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@ -468,10 +468,10 @@ class CLI
static::isWindows()
// Windows is a bit crap at this, but their terminal is tiny so shove this in
? static::newLine(40)
? static::newLine(40)
// Anything with a flair of Unix will handle these magic characters
: fwrite(STDOUT, chr(27) . '[H' . chr(27) . '[2J');
: fwrite(STDOUT, chr(27) . '[H' . chr(27) . '[2J');
}
//--------------------------------------------------------------------
@ -489,11 +489,9 @@ class CLI
*/
public static function color(string $text, string $foreground, string $background = null, string $format = null): string
{
if (static::isWindows() && ! isset($_SERVER['ANSICON']))
if (! static::hasColorSupport(STDOUT))
{
// @codeCoverageIgnoreStart
return $text;
// @codeCoverageIgnoreEnd
}
if (! array_key_exists($foreground, static::$foreground_colors))
@ -537,6 +535,7 @@ class CLI
{
return 0;
}
foreach (static::$foreground_colors as $color)
{
$string = strtr($string, ["\033[" . $color . 'm' => '']);
@ -554,6 +553,73 @@ class CLI
//--------------------------------------------------------------------
/**
* Checks whether the current stream resource supports or
* refers to a valid terminal type device.
*
* @param string $function
* @param resource $resource
*
* @return boolean
*/
public static function streamSupports(string $function, $resource): bool
{
if (ENVIRONMENT === 'testing')
{
// In the current setup of the tests we cannot fully check
// if the stream supports the function since we are using
// filtered streams.
return function_exists($function);
}
// @codeCoverageIgnoreStart
return function_exists($function) && @$function($resource);
// @codeCoverageIgnoreEnd
}
//--------------------------------------------------------------------
/**
* Returns true if the stream resource supports colors.
*
* This is tricky on Windows, because Cygwin, Msys2 etc. emulate pseudo
* terminals via named pipes, so we can only check the environment.
*
* Reference: https://github.com/composer/xdebug-handler/blob/master/src/Process.php
*
* @param resource $resource
*
* @return boolean
*/
public static function hasColorSupport($resource): bool
{
// Follow https://no-color.org/
if (isset($_SERVER['NO_COLOR']) || getenv('NO_COLOR') !== false)
{
return false;
}
if (getenv('TERM_PROGRAM') === 'Hyper')
{
return true;
}
if (static::isWindows())
{
// @codeCoverageIgnoreStart
return static::streamSupports('sapi_windows_vt100_support', $resource)
|| isset($_SERVER['ANSICON'])
|| getenv('ANSICON') !== false
|| getenv('ConEmuANSI') === 'ON'
|| getenv('TERM') === 'xterm';
// @codeCoverageIgnoreEnd
}
return static::streamSupports('stream_isatty', $resource);
}
//--------------------------------------------------------------------
/**
* Attempts to determine the width of the viewable CLI window.
*