Add collect-changelog script

.gitlab/merge_request_templates/Release.md

@@ -1,6 +1,6 @@
 ### Release checklist
 * [ ] Bump version in `mix.exs`
-* [ ] Compile a changelog
+* [ ] Compile a changelog with the `tools/collect-changelog` script
 * [ ] Create an MR with an announcement to pleroma.social
 #### post-merge
 * [ ] Tag the release on the merge commit

tools/collect-changelog

@@ -0,0 +1,27 @@
+#!/bin/sh
+
+collectType() {
+    local suffix="$1"
+    local header="$2"
+    local printed=0
+    for file in changelog.d/*."$suffix"; do
+        if [ '!' -f "$file" ]; then
+            continue
+        fi
+        if [ "$printed" = 0 ]; then
+            echo
+            echo "### $header"
+            printed=1
+        fi
+        # Normalize any trailing newlines/spaces, etc.
+        echo "- $(cat "$file")"
+    done
+}
+
+collectType security Security
+collectType change Changed
+collectType add Added
+collectType fix Fixed
+collectType remove Removed
+
+rm changelog.d/*