nextcloud-cronjob/scripts/find-container.sh

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#!/usr/bin/env bash
set -e
if [[ -n "$NEXTCLOUD_PROJECT_NAME" ]]; then
containerName="${NEXTCLOUD_PROJECT_NAME}[_-]"
matchEnd="[\._-]\d+"
else
matchEnd=","
fi
containerName="${containerName}${NEXTCLOUD_CONTAINER_NAME}"
# Get the ID of the first matching container so we can exec something in it later
docker ps --format '{{.Names}},{{.ID}}' | \
grep -E "^${containerName}${matchEnd}" | \
awk '{split($0,a,","); print a[2]}' | \
head -n 1