first commit

Packages/com.arongranberg.aline/PackageTools/Editor/DependencyCheck.cs

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+// Disable the warning: "Field 'DependencyCheck.Dependency.name' is never assigned to, and will always have its default value null"
+#pragma warning disable 649
+using UnityEditor;
+using System.Linq;
+
+namespace Drawing.Util {
+	[InitializeOnLoad]
+	static class DependencyCheck {
+		struct Dependency {
+			public string name;
+			public string version;
+		}
+
+		static DependencyCheck() {
+			var missingDependencies = new Dependency[] {
+#if !MODULE_BURST
+				new Dependency {
+					name = "com.unity.burst",
+					version = "1.2.1-preview",
+				},
+#endif
+#if !MODULE_MATHEMATICS
+				new Dependency {
+					name = "com.unity.mathematics",
+					version = "1.1.0",
+				},
+#endif
+#if !MODULE_COLLECTIONS
+				new Dependency {
+					name = "com.unity.collections",
+					version = "0.4.0-preview",
+				},
+#endif
+			};
+
+			if (missingDependencies.Length > 0) {
+				string missing = string.Join(", ", missingDependencies.Select(p => p.name + " (" + p.version + ")"));
+				bool res = EditorUtility.DisplayDialog("Missing dependencies", "The packages " + missing + " are required by ALINE but they are not installed, or the installed versions are too old. Do you want to install the latest versions of the packages?", "Ok", "Cancel");
+				if (res) {
+					foreach (var dep in missingDependencies) {
+						UnityEditor.PackageManager.Client.Add(dep.name);
+					}
+				}
+			}
+		}
+	}
+}