Add recuperation of the current version from git if available.

[teromene]

Include the version when auto-reporting an error.
When creating a new release, we can just update the version in the configuration class.

[logmanoriginal]

Good idea, this should help improve issue requests 👍

One point for consideration in my comment below.

[logmanoriginal]

Maybe include $VERSION as well?

return Configuration::$VERSION . ' (' . trim(file_get_contents($revisionHashFile)) . ')';

=> 2018-06-10 (937ea492716b9251211a2a0f73f3afd1ac871505)

---

.git/refs/heads/master always returns the latest commit in master! It wouldn't show branches. Here is an alternative implementation for consideration:

Notice: It uses exec to extract the latest commit hash in short form and reads the hash file only if that operation fails. This is purely cosmetic.

	public static function getVersion() {
		$headFile = '.git/HEAD';

		$version = Configuration::$VERSION;

		exec('git log --pretty="%h" -n1 HEAD', $output, $return);

		if(!$return) {
			$version .= ' (' . trim($output[0]) . ')';
		} elseif(file_exists($headFile)) {
			$head = trim(explode(':', file_get_contents($headFile))[1]);
			$revisionHashFile = '.git/' . $head;
			if(file_exists($revisionHashFile)) {
				$version .= ' (' . trim(file_get_contents($revisionHashFile)) . ')';
			}
		}

		return $version;
	}

[teromene]

The reason I decided to read the .git/refs/heads/master is for simplicity: I know it only shows the master revision, but if we have a bug report, we only consider it for the version we maitain, that is master. Moreover, a lot of shared hosts do not allow exec, which is why I decided to go for simplicity.

However I believe that we could include the branch name in the version string.

[logmanoriginal]

Including the branch name sounds like a much simpler alternative.

Using exec was just for cosmetic reasons (the full hash is quite long), as you can see it'll fall back to reading files if exec isn't working. But I'm not fixated on making this more complex than need be, so just leave it out 😄

[teromene]

Modified so it also includes the branch name. I also changed the hash so it is the same as the short hash (7 first chars of the hash)

[logmanoriginal]

Works on my end 👍