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976: Do not send empty emails #1128

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@@ -114,7 +114,7 @@ private Repository materializeArchive(Path scratchPath) {

private final static Pattern commandPattern = Pattern.compile("^\\s*/([A-Za-z]+).*$");
private static final Pattern commandPattern = Pattern.compile("^\\s*/([A-Za-z]+).*$", Pattern.MULTILINE | Pattern.DOTALL);

private boolean ignoreComment(HostUser author, String body) {
if (pr.repository().forge().currentUser().equals(author)) {
@@ -124,11 +124,12 @@ private boolean ignoreComment(HostUser author, String body) {
return true;
// Check if this comment only contains command lines
var commandOnly = body.strip().lines()
if (body.strip().lines().count() > 0 && commandOnly) {
return true;
var commandLineMatcher = commandPattern.matcher(body);
if (commandLineMatcher.find()) {
var filteredBody = commandLineMatcher.replaceAll("");
if (filteredBody.strip().isEmpty()) {
return true;
for (var ignoredCommentPattern : bot.ignoredComments()) {
var ignoredCommentMatcher = ignoredCommentPattern.matcher(body);
@@ -1516,6 +1516,18 @@ void filterComments(TestInfo testInfo) throws IOException {
assertFalse(archiveContains(archiveFolder.path(), "/newline"));
assertFalse(archiveContains(archiveFolder.path(), "/multiline"));
assertFalse(archiveContains(archiveFolder.path(), "will be dropped"));

// There should not be consecutive empty lines due to a filtered multiline message
var lines = archiveContents(archiveFolder.path(), "").orElseThrow();
assertFalse(lines.contains("\n\n\n"), lines);

// And a stand-alone multiline comment should not cause another mail to be sent
pr.addComment("/another\nmultiline\nwill not cause another mail");
Repository.materialize(archiveFolder.path(), archive.url(), "master");
lines = archiveContents(archiveFolder.path(), "").orElseThrow();
var mails = Mbox.splitMbox(lines, EmailAddress.from(""));
assertEquals(2, mails.size());