From 04f828f50f305a4843837dccde6549289a14fc30 Mon Sep 17 00:00:00 2001
From: Christian Pointner <equinox@helsinki.at>
Date: Wed, 8 Aug 2018 18:08:14 +0200
Subject: added script to clean docker registry


diff --git a/clean-docker-registry.sh b/clean-docker-registry.sh
new file mode 100755
index 0000000..b16087c
--- /dev/null
+++ b/clean-docker-registry.sh
@@ -0,0 +1,45 @@
+#!/bin/bash
+
+REPO_BASE_D="/srv/docker-registry/docker/registry/v2/repositories"
+
+cd "$REPO_BASE_D"
+declare -A revisions
+for repo in $(ls -d *); do
+  revisions=()
+  echo "$repo: "
+  echo " revisions:"
+  pushd "$repo/_manifests/revisions/" > /dev/null
+  for algo in $(ls -d *); do
+    pushd "$algo" > /dev/null
+    for revision in $(ls -d *); do
+      echo "  $algo:$revision"
+      revisions["$algo:$revision"]=0
+    done
+    popd > /dev/null
+  done
+  popd > /dev/null
+  echo " tags current:"
+  pushd "$repo/_manifests/tags/" > /dev/null
+  for tag in $(ls -d *); do
+     link=$(cat "$tag/current/link")
+     echo "  $tag: $link"
+     revisions["$link"]=1
+  done
+  popd > /dev/null
+  echo ""
+
+  for rev in "${!revisions[@]}"; do
+    if [ "${revisions[$rev]}" -eq 1 ]; then
+       echo -e " keeping \033[1;32m""$rev""\033[0m";
+    else
+       echo -n -e " removing \033[1;31m""$rev""\033[0m";
+       rm -rf "$repo/_manifests/revisions/$(echo $rev | tr ':' '/')"
+       rm -rf "$repo/_manifests/tags/"*"/index/$(echo $rev | tr ':' '/')"
+       echo " done."
+    fi
+  done
+
+  echo ""
+done
+
+docker exec -it docker-registry registry garbage-collect /etc/docker/registry/config.yml
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