Tokenize nuget versions for dependencies

In our template.nuspec files we had some cases where just using `$version$` wasn’t enough, since say Arch.Lifecycle.Runtime would be a different version than Arch.Core.Runtime.  So, now the nuget-setup build task will go through and replace a pattern of `$package.id.artifact-id$` with the correlating version from the ARTIFACTS list in the build script.

So, we can put something like: `$android.arch.lifecycle.common$` in the nuspec template and it will be replaced with `1.0.0` for example.

Author: Redth

arch-core/common/nuget/template.nuspec

@@ -14,7 +14,7 @@
     <iconUrl>https://raw.githubusercontent.com/xamarin/AndroidSupportComponents/master/icons/arch-core-common_128x128.png</iconUrl>
     <dependencies>
       <group targetFramework="MonoAndroid80">
-        <dependency id="Xamarin.Android.Support.Annotations" version="26.1.0" />
+        <dependency id="Xamarin.Android.Support.Annotations" version="$com.android.support.support-annotations$" />
       </group>
     </dependencies>
   </metadata>

arch-core/runtime/nuget/template.nuspec

@@ -14,8 +14,8 @@
     <iconUrl>https://raw.githubusercontent.com/xamarin/AndroidSupportComponents/master/icons/arch-core-runtime_128x128.png</iconUrl>
     <dependencies>
       <group targetFramework="MonoAndroid80">
-        <dependency id="Xamarin.Android.Support.Annotations" version="26.1.0" />
-        <dependency id="Xamarin.Android.Arch.Core.Common" version="1.0.0" />
+        <dependency id="Xamarin.Android.Support.Annotations" version="$com.android.support.support-annotations$" />
+        <dependency id="Xamarin.Android.Arch.Core.Common" version="$android.arch.core.common$" />
       </group>
     </dependencies>
   </metadata>

arch-lifecycle/common/nuget/template.nuspec

@@ -14,7 +14,7 @@
     <iconUrl>https://raw.githubusercontent.com/xamarin/AndroidSupportComponents/master/icons/arch-lifecycle-common_128x128.png</iconUrl>
     <dependencies>
       <group targetFramework="MonoAndroid80">
-        <dependency id="Xamarin.Android.Support.Annotations" version="26.1.0" />
+        <dependency id="Xamarin.Android.Support.Annotations" version="$com.android.support.support-annotations$" />
       </group>
     </dependencies>
   </metadata>

arch-lifecycle/extensions/nuget/template.nuspec

@@ -14,12 +14,12 @@
     <iconUrl>https://raw.githubusercontent.com/xamarin/AndroidSupportComponents/master/icons/arch-lifecycle-extensions_128x128.png</iconUrl>
     <dependencies>
       <group targetFramework="MonoAndroid80">
-        <dependency id="Xamarin.Android.Support.Annotations" version="26.1.0" />
-        <dependency id="Xamarin.Android.Support.Fragment" version="26.1.0" />
-        <dependency id="Xamarin.Android.Arch.Lifecycle.Runtime" version="1.0.3" />
-        <dependency id="Xamarin.Android.Arch.Lifecycle.Common" version="1.0.3" />
-        <dependency id="Xamarin.Android.Arch.Core.Common" version="1.0.0" />
-        <dependency id="Xamarin.Android.Arch.Core.Runtime" version="1.0.0" />
+        <dependency id="Xamarin.Android.Support.Annotations" version="$com.android.support.support-annotations$" />
+        <dependency id="Xamarin.Android.Support.Fragment" version="$com.android.support.support-fragment$" />
+        <dependency id="Xamarin.Android.Arch.Lifecycle.Runtime" version="$android.arch.lifecycle.runtime$" />
+        <dependency id="Xamarin.Android.Arch.Lifecycle.Common" version="$android.arch.lifecycle.common$" />
+        <dependency id="Xamarin.Android.Arch.Core.Common" version="$android.arch.core.common$" />
+        <dependency id="Xamarin.Android.Arch.Core.Runtime" version="$android.arch.core.runtime$" />
       </group>
     </dependencies>
   </metadata>

arch-lifecycle/runtime/nuget/template.nuspec

@@ -14,9 +14,9 @@
     <iconUrl>https://raw.githubusercontent.com/xamarin/AndroidSupportComponents/master/icons/arch-lifecycle-runtime_128x128.png</iconUrl>
     <dependencies>
       <group targetFramework="MonoAndroid80">
-        <dependency id="Xamarin.Android.Support.Annotations" version="26.1.0" />
-        <dependency id="Xamarin.Android.Arch.Lifecycle.Common" version="1.0.1" />
-        <dependency id="Xamarin.Android.Arch.Core.Common" version="1.0.0" />
+        <dependency id="Xamarin.Android.Support.Annotations" version="$com.android.support.support-annotations$" />
+        <dependency id="Xamarin.Android.Arch.Lifecycle.Common" version="$android.arch.lifecycle.common$" />
+        <dependency id="Xamarin.Android.Arch.Core.Common" version="$android.arch.core.common$" />
       </group>
     </dependencies>
   </metadata>

build.cake

@@ -392,6 +392,15 @@ Task ("nuget-setup")
 
 		// Transform all template.nuspec files
 		var nuspecText = FileReadText(art.PathPrefix + art.ArtifactId + "/nuget/template.nuspec");
+
+		// We use a pattern of $package.id.artifact.id$ as a placeholder in nuspec templates
+		// which we want to substitute the actual nuget version into
+		// So for example $com.android.support.support-compat$ would get replaced with the nuget version for Xamarin.Android.Support.Compat
+		foreach (var artifactInfo in ARTIFACTS) {
+			var placeholder = "$" + artifactInfo.Package + "." + artifactInfo.ArtifactId + "$";
+			nuspecText = nuspecText.Replace(placeholder, artifactInfo.NuGetVersion);
+		}
+
 		//nuspecText = nuspecText.Replace ("$xbdversion$", XBD_VERSION);
 		var nuspecFile = new FilePath(art.PathPrefix + art.ArtifactId + "/nuget/" + art.NugetId + ".nuspec");
 		FileWriteText(nuspecFile, nuspecText);