Respect case-sensitive branches in release PR associations

Author: MariusStorhaug

.github/actions/Get-PSModuleSettings/src/Get-PSModuleSettings.Helpers.psm1

@@ -105,7 +105,7 @@ function Select-PullRequestForPush {
 
     $PullRequest |
         Where-Object {
-            $_.Base.Ref -eq $DefaultBranch -and
+            $_.Base.Ref -ceq $DefaultBranch -and
             -not [string]::IsNullOrWhiteSpace($_.merged_at) -and
             $_.merge_commit_sha -eq $CommitSha
         } |
@@ -161,7 +161,7 @@ function Get-DiscardedReleasePullRequest {
 
     foreach ($candidate in ($PullRequest | Where-Object { $null -ne $_ })) {
         $isMergedToDefaultBranch = (
-            $candidate.Base.Ref -eq $DefaultBranch -and
+            $candidate.Base.Ref -ceq $DefaultBranch -and
             -not [string]::IsNullOrWhiteSpace($candidate.merged_at)
         )
         if (-not $isMergedToDefaultBranch) { continue }

.github/actions/Get-PSModuleSettings/tests/Get-PSModuleSettings.Helpers.Tests.ps1

@@ -83,6 +83,15 @@ Describe 'Resolve-WorkflowEventRouting' {
 }
 
 Describe 'Select-PullRequestForPush' {
+    It 'does not select a merged PR targeting a differently cased branch' {
+        $request = [pscustomobject]@{
+            Base = [pscustomobject]@{ Ref = 'Main' }; merged_at = '2026-09-01T00:00:00Z'; merge_commit_sha = 'pushed-sha'
+        }
+
+        Select-PullRequestForPush -PullRequest @($request) -DefaultBranch main -CommitSha pushed-sha |
+            Should -BeNullOrEmpty
+    }
+
     It 'selects the merged PR whose merge commit matches the pushed commit' {
         $pullRequests = @(
             [pscustomobject]@{
@@ -357,6 +366,14 @@ Describe 'Resolve-ReleasePullRequest' {
 }
 
 Describe 'Get-DiscardedReleasePullRequest' {
+    It 'does not reject a release based on another differently cased branch' {
+        $request = [pscustomobject]@{
+            Base = [pscustomobject]@{ Ref = 'Main' }; merged_at = '2026-09-01T00:00:00Z'; merge_commit_sha = 'other-sha'
+        }
+
+        @(Get-DiscardedReleasePullRequest -PullRequest @($request) -DefaultBranch main -CommitSha pushed-sha).Count |
+            Should -Be 0
+    }
     It 'reports a merged default-branch pull request that does not match the released commit' {
         $pullRequests = @(
             [pscustomobject]@{