Update change log generation tool to deal with private commits (#10096)

tools/releaseTools.psm1

@@ -33,6 +33,9 @@ class CommitNode {
 # We have their names in this array so that we don't need to query GitHub to find out if they are powershell team members.
 $Script:powershell_team = @(
     "Robert Holt"
+    "Travis Plunk"
+    "dependabot-preview[bot]"
+    "Joey Aiello"
 )
 
 # They are very active contributors, so we keep their email-login mappings here to save a few queries to Github.
@@ -150,7 +153,10 @@ function Get-ChangeLog
 
     # Find the merge commit that merged the release branch to master.
     $child_merge_commit = Get-ChildMergeCommit -CommitHash $tag_hash
-    $commit_hash, $parent_hashes = $child_merge_commit.Split("||")
+    if($child_merge_commit)
+    {
+        $commit_hash, $parent_hashes = $child_merge_commit.Split("||")
+    }
     # Find the other parent of the merge commit, which represents the original head of master right before merging.
     $other_parent_hash = ($parent_hashes -replace $tag_hash).Trim()
 
@@ -169,7 +175,11 @@ function Get-ChangeLog
         # Find the commits that were only in the release branch, excluding those that were cherry-picked from master branch.
         $new_commits_from_last_release = git --no-pager log --first-parent --cherry-pick --left-only "$tag_hash...$other_parent_hash" --format=$format | New-CommitNode
         # Find the commits that are actually duplicate but having different patch-ids due to resolving conflicts during the cherry-pick.
-        $duplicate_commits = Compare-Object $new_commits_from_last_release $new_commits_from_other_parent -Property PullRequest -ExcludeDifferent -IncludeEqual -PassThru
+        $duplicate_commits = $null
+        if($new_commits_from_last_release -and $new_commits_from_other_parent)
+        {
+            $duplicate_commits = Compare-Object $new_commits_from_last_release $new_commits_from_other_parent -Property PullRequest -ExcludeDifferent -IncludeEqual -PassThru
+        }
         if ($duplicate_commits) {
             $duplicate_pr_numbers = @($duplicate_commits | ForEach-Object -MemberName PullRequest)
             $new_commits_from_other_parent = $new_commits_from_other_parent | Where-Object PullRequest -NotIn $duplicate_pr_numbers
@@ -234,14 +244,17 @@ function Get-ChangeLog
     $clExperimental = @()
 
     foreach ($commit in $new_commits) {
+        Write-Verbose "authorname: $($commit.AuthorName)"
         if ($commit.AuthorEmail.EndsWith("@microsoft.com") -or $powershell_team -contains $commit.AuthorName -or $Script:attribution_ignore_list -contains $commit.AuthorEmail) {
-            $commit.ChangeLogMessage = "- {0}" -f $commit.Subject
+            $commit.ChangeLogMessage = "- {0}" -f (Get-ChangeLogMessage $commit.Subject)
         } else {
             if ($community_login_map.ContainsKey($commit.AuthorEmail)) {
                 $commit.AuthorGitHubLogin = $community_login_map[$commit.AuthorEmail]
             } else {
                 $uri = "https://api.github.com/repos/PowerShell/PowerShell/commits/$($commit.Hash)"
-                $response = Invoke-WebRequest -Uri $uri -Method Get -Headers $header -ErrorAction SilentlyContinue
+                try{
+                    $response = Invoke-WebRequest -Uri $uri -Method Get -Headers $header -ErrorAction Ignore
+                } catch{}
                 if($response)
                 {
                     $content = ConvertFrom-Json -InputObject $response.Content
@@ -249,7 +262,7 @@ function Get-ChangeLog
                     $community_login_map[$commit.AuthorEmail] = $commit.AuthorGitHubLogin
                 }
             }
-            $commit.ChangeLogMessage = "- {0} (Thanks @{1}!)" -f $commit.Subject, $commit.AuthorGitHubLogin
+            $commit.ChangeLogMessage = ("- {0} (Thanks @{1}!)" -f (Get-ChangeLogMessage $commit.Subject), $commit.AuthorGitHubLogin)
         }
 
         if ($commit.IsBreakingChange) {
@@ -262,12 +275,19 @@ function Get-ChangeLog
         }
         catch {
             if ($_.Exception.Response.StatusCode -eq '404') {
-                Write-Warning -Message "Ignoring commit $($commit.Hash) by $($commit.AuthorName), as it does not have a PR."
-                continue
+                $pr = $null
+                #continue
             }
         }
 
-        $clLabel = $pr.labels | Where-Object { $_.Name -match "^CL-"}
+        if($pr)
+        {
+            $clLabel = $pr.labels | Where-Object { $_.Name -match "^CL-"}
+        }
+        else {
+            Write-Warning -Message "Tagging $($commit.Hash) by $($commit.AuthorName), as CL-BuildPackaging as it does not have a PR."
+            $clLabel = [PSCustomObject]@{Name ='CL-BuildPackaging'}
+        }
 
         if ($clLabel.count -gt 1 -and $clLabel.Name -notcontains 'CL-BreakingChange') {
             $multipleLabelsPRs += $pr
@@ -329,6 +349,24 @@ function PrintChangeLog($clSection, $sectionTitle) {
     }
 }
 
+function Get-ChangeLogMessage
+{
+    param($OriginalMessage)
+
+    switch -regEx ($OriginalMessage)
+    {
+        '^Merged PR (\d*): ' {
+            return $OriginalMessage.replace($Matches.0,'') + " (Internal $($Matches.1))"
+        }
+        '^Build\(deps\): ' {
+            return $OriginalMessage.replace($Matches.0,'')
+        }
+        default {
+            return $OriginalMessage
+        }
+    }
+}
+
 ##############################
 #.SYNOPSIS
 #Gets packages which have newer packages in nuget.org