Fsdk/Misc: support <ApplicationVersion>

Before this commit, the only way to get the
current version of a project was to have
AssemblyInfo files with the corresponding
attributes, but that approach is very .NET4.x
(legacy), so this MSBuild-based one is more in
line with the times.

Fsdk/Fsdk-legacy.fsproj

@@ -48,6 +48,11 @@
     <Reference Include="System.Numerics" />
     <Reference Include="System.Web" />
     <Reference Include="System.Web.Extensions" />
+    <Reference Include="System.Xml" />
+    <Reference Include="System.Xml.Linq" />
+    <Reference Include="System.Xml.XDocument">
+      <HintPath>..\packages\System.Xml.XDocument.4.3.0\ref\netstandard1.0\System.Xml.XDocument.dll</HintPath>
+    </Reference>
   </ItemGroup>
   <ItemGroup>
     <Compile Include="AssemblyInfo.fs" />
@@ -59,6 +64,9 @@
     <Compile Include="Git.fs" />
     <Compile Include="Taiga.fs" />
   </ItemGroup>
+  <ItemGroup>
+    <None Include="packages.config" />
+  </ItemGroup>
   <Import Project="..\CommonBuildProps-legacy.proj" />
   <Import Condition="'$(FSharpTargetsPath)' != ''" Project="$(FSharpTargetsPath)" />
   <Target Name="BeforeBuild">

Fsdk/Fsdk.fsproj

@@ -46,6 +46,11 @@
       />
   </ItemGroup>
 
+  <ItemGroup>
+    <PackageReference Include="System.Xml.XDocument" Version="4.3.0">
+      <GeneratePathProperty></GeneratePathProperty>
+    </PackageReference>
+  </ItemGroup>
   <ItemGroup>
     <PackageReference Update="FSharp.Core" Version="4.7.0" />
   </ItemGroup>

Fsdk/Misc.fs

@@ -5,6 +5,9 @@ open System.IO
 open System.Text
 open System.Reflection
 open System.Linq
+open System.Xml
+open System.Xml.Linq
+open System.Xml.XPath
 #if LEGACY_FRAMEWORK
 open System.Configuration
 open System.Security.Cryptography
@@ -636,34 +639,8 @@ module Misc =
 
         not(String.IsNullOrEmpty(gitlabUserEmail))
 
-    let GetCurrentVersion(dir: DirectoryInfo) : Version =
-        let defaultAssemblyVersionFileName = "AssemblyInfo.fs"
-
-        let assemblyVersionFsFiles =
-            (Directory.EnumerateFiles(
-                dir.FullName,
-                defaultAssemblyVersionFileName,
-                SearchOption.AllDirectories
-            ))
-
-        let assemblyVersionFsFile =
-            if assemblyVersionFsFiles.Count() = 1 then
-                assemblyVersionFsFiles.Single()
-            else
-                (Directory.EnumerateFiles(
-                    dir.FullName,
-                    "Common" + defaultAssemblyVersionFileName,
-                    SearchOption.AllDirectories
-                ))
-                    .SingleOrDefault()
-
-        if assemblyVersionFsFile = null then
-            Console.Error.WriteLine(
-                "Canonical AssemblyInfo not found in any subfolder (or found too many), cannot extract version number"
-            )
-
-            Environment.Exit 1
-
+    // TODO: move this as nested func of GetCurrentVersion()
+    let private GetCurrentVersionFromAssemblyInfos(assemblyVersionFsFile: string) : Version =
         let assemblyVersionAttribute = "AssemblyVersion"
 
         let lineContainingVersionNumber =
@@ -713,6 +690,53 @@ module Misc =
 
         Version(version)
 
+    let GetCurrentVersion(dir: DirectoryInfo) : Version =
+        let defaultAssemblyVersionFileName = "AssemblyInfo.fs"
+
+        let assemblyVersionFsFiles =
+            (Directory.EnumerateFiles(
+                dir.FullName,
+                defaultAssemblyVersionFileName,
+                SearchOption.AllDirectories
+            ))
+
+        let assemblyVersionFsFile =
+            if assemblyVersionFsFiles.Count() = 1 then
+                assemblyVersionFsFiles.Single()
+            else
+                (Directory.EnumerateFiles(
+                    dir.FullName,
+                    "Common" + defaultAssemblyVersionFileName,
+                    SearchOption.AllDirectories
+                ))
+                    .SingleOrDefault()
+
+        if not (isNull assemblyVersionFsFile) then
+            GetCurrentVersionFromAssemblyInfos assemblyVersionFsFile
+        else
+            let projectFiles =
+                (Directory.EnumerateFiles(
+                    dir.FullName,
+                    "*.*proj",
+                    SearchOption.AllDirectories
+                ))
+            let versions =
+                seq {
+                    for projFile in projectFiles do
+                        let xmlDoc = XDocument.Load projFile
+                        let query = "//ApplicationVersion"
+                        let appVersionElements = xmlDoc.XPathSelectElements query
+                        for appVersionElement in appVersionElements do
+                            yield appVersionElement.Value
+                } |> Seq.distinct
+            if Seq.isEmpty versions then
+                failwithf "No <ApplicationVersion> tag found in project files"
+            match Seq.tryExactlyOne versions with
+            | None ->
+                let versionsStr = String.Join(",", versions)
+                failwithf "More than one <ApplicationVersion> tag found in project files: %s" versionsStr
+            | Some version ->
+                Version version
 
     let SqlReadOnlyGroupName = "sqlreadonly"
 

Fsdk/packages.config

@@ -1,4 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
   <package id="FSharp.Core" version="5.0.0.0" />
+  <package id="System.Xml.XDocument" version="4.3.0" targetFramework="net471" />
 </packages>