Add a new function GetOldVesion to VersionBumper to avoid duplicated version (#12084)

* Add a new function GetOldVersion and change the way of getting oldversion.

* Add return value to function GetOldVersion and change some logic to make it more readable.

* Merge the logic of judging preview version into GetOldVersion and return both version and ispreview.

Author: chenlei-yang

tools/VersionController/Models/VersionBumper.cs

@@ -3,6 +3,7 @@
 using System.IO;
 using System.Linq;
 using System.Management.Automation;
+using System.Management.Automation.Language;
 using System.Reflection;
 using System.Text.RegularExpressions;
 using Tools.Common.Models;
@@ -33,26 +34,16 @@ public void BumpAllVersions()
         {
             var moduleName = _fileHelper.ModuleName;
             Console.WriteLine("Bumping version for " + moduleName + "...");
-            using (PowerShell powershell = PowerShell.Create())
-            {
-                powershell.AddScript("Set-ExecutionPolicy -ExecutionPolicy Unrestricted -Scope Process;");
-                powershell.AddScript("$metadata = Test-ModuleManifest -Path " + _fileHelper.OutputModuleManifestPath + ";$metadata.Version;$metadata.PrivateData.PSData.Prerelease");
-                var cmdletResult = powershell.Invoke();
-                _oldVersion = cmdletResult[0]?.ToString();
-                _isPreview = !string.IsNullOrEmpty(cmdletResult[1]?.ToString());
-            }
 
-            if (_oldVersion == null)
-            {
-                throw new Exception("Unable to obtain old version of " + moduleName + " using the built module manifest.");
-            }
+            (_oldVersion, _isPreview) = GetOldVersion();
 
             _newVersion = IsNewModule() ? _oldVersion : GetBumpedVersion();
-            if(MinimalVersion != null && MinimalVersion > new AzurePSVersion(_newVersion))
+            if (MinimalVersion != null && MinimalVersion > new AzurePSVersion(_newVersion))
             {
                 Console.WriteLine($"Adjust version from {_newVersion} to {MinimalVersion} due to MinimalVersion.csv");
                 _newVersion = MinimalVersion.ToString();
             }
+
             if (_oldVersion == _newVersion)
             {
                 Console.WriteLine(_fileHelper.ModuleName + " is a new module. Keeping the version at " + _oldVersion);
@@ -78,6 +69,86 @@ public void BumpAllVersions()
             Console.WriteLine("Finished bumping version " + moduleName + "\n");
         }
 
+        /// <summary>
+        /// Get the old version of the module.
+        /// Compare the version from PSGallery and TestGallery to the version obtain from manifest.
+        /// Choose the maximum one as the old version.
+        /// </summary>
+        /// <returns>The old version and is or not preview before the bump.</returns>
+        public Tuple<string, bool> GetOldVersion()
+        {
+            string version;
+            string localVersion = null, psVersion = null, testVersion = null;
+            bool isPreview;
+            bool localPreview = false, psPreview = false, testPreview = false;
+            var moduleName = _fileHelper.ModuleName;
+            
+            using (PowerShell powershell = PowerShell.Create())
+            {
+                powershell.AddScript("Set-ExecutionPolicy -ExecutionPolicy Unrestricted -Scope Process;");
+                powershell.AddScript("$metadata = Test-ModuleManifest -Path " + _fileHelper.OutputModuleManifestPath + ";$metadata.Version;$metadata.PrivateData.PSData.Prerelease");
+                var cmdletResult = powershell.Invoke();
+                localVersion = cmdletResult[0]?.ToString();
+                localPreview = !string.IsNullOrEmpty(cmdletResult[1]?.ToString());
+            }
+            if (localVersion == null)
+            {
+                throw new Exception("Unable to obtain old version of " + moduleName + " using the built module manifest.");
+            }
+            version = localVersion;
+            isPreview = localPreview;
+
+            using (PowerShell powetshell = PowerShell.Create())
+            {
+                powetshell.AddScript("Register-PackageSource -Name PSGallery -Location https://www.powershellgallery.com/api/v2 -ProviderName PowerShellGet");
+                powetshell.AddScript("Find-Module -Name " + moduleName + " -AllowPrerelease -Repository PSGallery -AllVersions");
+                var cmdletResult = powetshell.Invoke();
+                if (cmdletResult.Count != 0)
+                {
+                    var psVersionImformation = cmdletResult[0].ToString();
+                    Regex reg = new Regex("Version=(.*?)(-|;)");
+                    Match match = reg.Match(psVersionImformation);
+                    psVersion = match.Groups[1].Value;
+                    psPreview = Regex.IsMatch(psVersionImformation, "preview");
+                }
+            }
+            if (psVersion == null)
+            {
+                psVersion = "0.1.0";
+            }
+            if (new AzurePSVersion(psVersion) > new AzurePSVersion(version))
+            {
+                version = psVersion;
+                isPreview = psPreview;
+            }
+
+            using (PowerShell powetshell = PowerShell.Create())
+            {
+                powetshell.AddScript("Register-PackageSource -Name TestGallery -Location https://www.poshtestgallery.com/api/v2 -ProviderName PowerShellGet");
+                powetshell.AddScript("Find-Module -Name " + moduleName + " -AllowPrerelease -Repository TestGallery -AllVersions");
+                var cmdletResult = powetshell.Invoke();
+                if (cmdletResult.Count != 0)
+                {
+                    var testVersionImformation = cmdletResult[0].ToString();
+                    Regex reg = new Regex("Version=(.*?)(-|;)");
+                    Match match = reg.Match(testVersionImformation);
+                    testVersion = match.Groups[1].Value;
+                    testPreview = Regex.IsMatch(testVersionImformation, "preview");
+                }
+            }
+            if (testVersion == null)
+            {
+                testVersion = "0.1.0";
+            }
+            if (new AzurePSVersion(testVersion) > new AzurePSVersion(version))
+            {
+                version = testVersion;
+                isPreview = testPreview;
+            }
+
+            return Tuple.Create(version, isPreview);
+        }
+
         /// <summary>
         /// Apply a version bump to a given version.
         /// </summary>