From e6df6d596a51ee3d795f8707d43654f4516adc61 Mon Sep 17 00:00:00 2001
From: Ivan Dlugos <dlugos.ivan@gmail.com>
Date: Fri, 7 Feb 2025 15:34:19 +0100
Subject: [PATCH 1/3] fix: truncate changelog if oldTag is missing

---
 updater/scripts/get-changelog.ps1     | 49 ++++++++++++++++++++++-----
 updater/tests/get-changelog.Tests.ps1 | 19 +++++++++++
 2 files changed, 59 insertions(+), 9 deletions(-)

diff --git a/updater/scripts/get-changelog.ps1 b/updater/scripts/get-changelog.ps1
index d7ae438..90d5d72 100644
--- a/updater/scripts/get-changelog.ps1
+++ b/updater/scripts/get-changelog.ps1
@@ -40,32 +40,63 @@ finally
     Remove-Item -Recurse -Force -ErrorAction Continue -Path $tmpDir
 }
 
-$foundFirst = $false
+$startIndex = -1
+$endIndex = -1
 $changelog = ''
 for ($i = 0; $i -lt $lines.Count; $i++)
 {
     $line = $lines[$i]
 
-    if (-not $foundFirst)
+    if ($startIndex -lt 0)
     {
         if ($line -match "^#+ +v?$NewTag\b")
         {
-            $foundFirst = $true
-        }
-        else
-        {
-            continue
+            $startIndex = $i
         }
     }
     elseif ($line -match "^#+ +v?$OldTag\b")
     {
+        $endIndex = $i - 1
         break
     }
+}
 
-    $changelog += "$line`n"
+# If the changelog doesn't have a section for the oldTag, stop at the first SemVer that's lower than oldTag.
+if ($endIndex -lt 0)
+{
+    $endIndex = $lines.Count - 1 # fallback, may be overwritten below
+    try
+    {
+        $semverOldTag = [System.Management.Automation.SemanticVersion]::Parse($OldTag)
+        for ($i = $startIndex; $i -lt $lines.Count; $i++)
+        {
+            $line = $lines[$i]
+            if ($line -match '^#+ +v?([0-9]+.*)$')
+            {
+                try
+                {
+                    if ($semverOldTag -ge [System.Management.Automation.SemanticVersion]::Parse($matches[1]))
+                    {
+                        $endIndex = $i - 1
+                        break
+                    }
+                }
+                catch {}
+            }
+        }
+    }
+    catch {}
 }
 
-$changelog = $changelog.Trim()
+# Slice changelog lines from startIndex to endIndex.
+if ($startIndex -ge 0)
+{
+    $changelog = ($lines[$startIndex..$endIndex] -join "`n").Trim()
+}
+else
+{
+    $changelog = ''
+}
 if ($changelog.Length -gt 1)
 {
     $changelog = "# Changelog`n$changelog"
diff --git a/updater/tests/get-changelog.Tests.ps1 b/updater/tests/get-changelog.Tests.ps1
index 313ec4b..0e2b5c5 100644
--- a/updater/tests/get-changelog.Tests.ps1
+++ b/updater/tests/get-changelog.Tests.ps1
@@ -89,6 +89,25 @@ Features, fixes and improvements in this release have been contributed by:
         $actual | Should -Be $expected
     }
 
+    It 'Does not show versions older than OldTag even if OldTag is missing' {
+        $actual = & "$PSScriptRoot/../scripts/get-changelog.ps1" `
+            -RepoUrl 'https://github.com/getsentry/github-workflows' -OldTag '2.1.5' -NewTag '2.2.1'
+        $actual | Should -Be @'
+## Changelog
+### 2.2.1
+
+#### Fixes
+
+- Support comments when parsing pinned actions in Danger ([#40](https://github-redirect.dependabot.com/getsentry/github-workflows/pull/40))
+
+### 2.2.0
+
+#### Features
+
+- Danger - check for that actions are pinned to a commit ([#39](https://github-redirect.dependabot.com/getsentry/github-workflows/pull/39))
+'@
+    }
+
     It 'truncates too long text' {
         $actual = & "$PSScriptRoot/../scripts/get-changelog.ps1" `
             -RepoUrl 'https://github.com/getsentry/sentry-cli' -OldTag '1.0.0' -NewTag '2.4.0'

From 964582e9c2c9676770867e0136e27f5cb8979c38 Mon Sep 17 00:00:00 2001
From: Ivan Dlugos <dlugos.ivan@gmail.com>
Date: Fri, 7 Feb 2025 15:35:29 +0100
Subject: [PATCH 2/3] chore: changelog

---
 CHANGELOG.md | 1 +
 1 file changed, 1 insertion(+)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index afb7fcc..7a9157d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,7 @@
 
 - Don't update from a manually-updated prerelease to a latest stable release that is earlier than the prerelease ([#78](https://github.com/getsentry/github-workflows/pull/78))
 - Cross-repo links in changelog notes ([#82](https://github.com/getsentry/github-workflows/pull/82))
+- Truncate changelog to the earliest older SemVer even if if the previous version is missing ([#84](https://github.com/getsentry/github-workflows/pull/84))
 
 ## 2.11.0
 

From 1e702e5d795a6053c0745e4c5915371402b9f7b1 Mon Sep 17 00:00:00 2001
From: Ivan Dlugos <dlugos.ivan@gmail.com>
Date: Fri, 7 Feb 2025 15:37:47 +0100
Subject: [PATCH 3/3] chore: changelog

---
 CHANGELOG.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7a9157d..d65c03c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,7 +6,7 @@
 
 - Don't update from a manually-updated prerelease to a latest stable release that is earlier than the prerelease ([#78](https://github.com/getsentry/github-workflows/pull/78))
 - Cross-repo links in changelog notes ([#82](https://github.com/getsentry/github-workflows/pull/82))
-- Truncate changelog to the earliest older SemVer even if if the previous version is missing ([#84](https://github.com/getsentry/github-workflows/pull/84))
+- Truncate changelog to nearest SemVer even if actual previous version is missing ([#84](https://github.com/getsentry/github-workflows/pull/84))
 
 ## 2.11.0