#!/bin/bash

# Copies all tagged images with defined tag to a new one - using Harbor Retag feature.

# config vars
SRC_TAG="latest"
DST_TAG="v1"
HARBOR_API_URL="https://hostname/api"
HARBOR_USR="username"
HARBOR_PSW="password"

CURL_CMD="curl -Ssq -u $HARBOR_USR:$HARBOR_PSW"

REPOS=$($CURL_CMD -H "accept: application/json" -X GET "$HARBOR_API_URL/search?q=" | jq -r '.repository[] | .repository_name')
for REPO in $REPOS
do
  #echo "INFO: processing repo $REPO..."
  REPO_CODED=`echo $REPO | sed 's/\//\%2f/g'`
  TAGS=$($CURL_CMD -H "accept: application/json" -X GET "$HARBOR_API_URL/repositories/$REPO_CODED/tags?detail=false" | jq -r '.[] | .name')

  # validations
  [[ -z "$TAGS" ]] && { echo "WARN: no tags found in $REPO" && continue; }
  [[ "$TAGS" == *$SRC_TAG* ]] || { echo "WARN: no tag $SRC_TAG found in $REPO" && continue; }
  [[ "$TAGS" == *$DST_TAG* ]] && { echo "WARN: tag $DST_TAG already exists in $REPO" && continue; }

  # retag request
  echo "INFO: retagging tag $SRC_TAG to $DST_TAG on $REPO..."
  $CURL_CMD -X POST "$HARBOR_API_URL/repositories/$REPO_CODED/tags" \
    -H "Content-Type: application/json" \
    -d "{ \"override\": false, \"src_image\": \"$REPO:$SRC_TAG\", \"tag\": \"$DST_TAG\"}"
done