cli/scripts/updateUID.Dockerfile at main · v-Mathiyarasy/cli · GitHub

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# Licensed under the MIT License. See License.txt in the project root for license information.

ARG BASE_IMAGE

FROM $BASE_IMAGE

USER root

ARG REMOTE_USER

ARG NEW_UID

ARG NEW_GID

SHELL ["/bin/sh", "-c"]

RUN eval $(sed -n "s/${REMOTE_USER}:[^:]*:$[^:]*$:$[^:]*$:[^:]*:$[^:]*$.*/OLD_UID=\1;OLD_GID=\2;HOME_FOLDER=\3/p" /etc/passwd); \

eval $(sed -n "s/$[^:]*$:[^:]*:${NEW_UID}:.*/EXISTING_USER=\1/p" /etc/passwd); \

eval $(sed -n "s/$[^:]*$:[^:]*:${NEW_GID}:.*/EXISTING_GROUP=\1/p" /etc/group); \

if [ -z "$OLD_UID" ]; then \

echo "Remote user not found in /etc/passwd ($REMOTE_USER)."; \

elif [ "$OLD_UID" = "$NEW_UID" -a "$OLD_GID" = "$NEW_GID" ]; then \

echo "UIDs and GIDs are the same ($NEW_UID:$NEW_GID)."; \

elif [ "$OLD_UID" != "$NEW_UID" -a -n "$EXISTING_USER" ]; then \

echo "User with UID exists ($EXISTING_USER=$NEW_UID)."; \

else \

if [ "$OLD_GID" != "$NEW_GID" -a -n "$EXISTING_GROUP" ]; then \

echo "Group with GID exists ($EXISTING_GROUP=$NEW_GID)."; \

NEW_GID="$OLD_GID"; \

fi; \

echo "Updating UID:GID from $OLD_UID:$OLD_GID to $NEW_UID:$NEW_GID."; \

sed -i -e "s/$${REMOTE_USER}:[^:]*:$[^:]*:[^:]*/\1${NEW_UID}:${NEW_GID}/" /etc/passwd; \

if [ "$OLD_GID" != "$NEW_GID" ]; then \

sed -i -e "s/$[^:]*:[^:]*:$${OLD_GID}:/\1${NEW_GID}:/" /etc/group; \

fi; \

chown -R $NEW_UID:$NEW_GID $HOME_FOLDER; \

fi;

ARG IMAGE_USER

USER $IMAGE_USER

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