[PATCH v2 13/18] remote-mediawiki: fix duplicate revisions being imported

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From: Simon Legner <Simon.Legner@xxxxxxxxx>

Fix a bug with revisions being imported twice. This commit is being
backported from Git-Mediawiki.git's e41ee9b ("All revisions imported
twice", 2018-02-02) to git.git. See [1] for the original commit and
[2] and [3] for the upstream PR and issue.

1. https://github.com/Git-Mediawiki/Git-Mediawiki/commit/e41ee9b3a32416df381cdc79f63350665c84151e
2. https://github.com/Git-Mediawiki/Git-Mediawiki/pull/61
3. https://github.com/Git-Mediawiki/Git-Mediawiki/issues/29

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@xxxxxxxxx>
---
 contrib/mw-to-git/git-remote-mediawiki.perl | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/contrib/mw-to-git/git-remote-mediawiki.perl b/contrib/mw-to-git/git-remote-mediawiki.perl
index 08190e23e1..26d5e1a174 100755
--- a/contrib/mw-to-git/git-remote-mediawiki.perl
+++ b/contrib/mw-to-git/git-remote-mediawiki.perl
@@ -807,7 +807,10 @@ sub get_more_refs {
 sub mw_import {
 	# multiple import commands can follow each other.
 	my @refs = (shift, get_more_refs('import'));
+	my $processedRefs;
 	foreach my $ref (@refs) {
+		next if $processedRefs->{$ref}; # skip duplicates: "import refs/heads/master" being issued twice; TODO: why?
+		$processedRefs->{$ref} = 1;
 		mw_import_ref($ref);
 	}
 	print {*STDOUT} "done\n";
-- 
2.28.0.297.g1956fa8f8d




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