Support to Branch without SemVer

Hello again @mob-sakai , i thinking if its okey to you to add support to Non-SemVer dependence resolver. I already implemented inside my project to manage this.

The logic behind is:

if (Has any previous InstalledPackage with this name && dependence.version == null) { //Keep any previous downloaded version } else if(InstalledPackage with this name not present) { //Download using dependence URL (probably is a head or a branch, like UPM branch) }

IMPLEMENTATION

PackageMeta.cs

		public static PackageMeta FromNameAndUrl (string name, string url)
		{
. . .
				if (first.Contains ("://"))
				{
					meta.path = first;
					meta.branch = 0 < second.Length ? second : "HEAD";
					SemVersion version;
					if (!SemVersion.TryParse(meta.branch, out version))
						version = null;//empty version
					meta.version = version;
				}
. . .
		}

GitDependencyResolver.cs

		static void UninstallUnusedPackages ()
		{
. . .		
				// Collect unused pakages.
				var unusedPackages = autoInstalledPackages
					.Where (x => Path.GetFileName(x.path).StartsWith (".", Ordinal))         // Directory name starts with '.'. This is 'auto-installed package'
					.Where (x => !allDependencies.Any (y => y.name == x.name && (y.version == null || y.version == x.version)))   // No depended from other packages
					;
. . .
		}

		static void StartResolve ()
		{
. . .
			// Check all dependencies.
			foreach (var dependency in dependencies)
			{
                // Is the depended package installed already?
                bool isInstalled = installedPackages
                        .Concat(requestedPackages)
                        .Any(x => dependency.name == x.name && ((dependency.version != null && dependency.version <= x.version) || (dependency.version == null)));

				// Install the depended package later.
				if (!isInstalled)
				{
					requestedPackages.RemoveAll (x => dependency.name == x.name);
					requestedPackages.Add (dependency);
				}
			}
. . .
		}

Best Regards Rafael

[rafcsoares]

done @mob-sakai

#20

[mob-sakai]

To my shame, I misunderstood that this is UpmGitExtension. 😉