Option to remove docker image built after execution

[davidferlay]

Observed

• After executing an action relying on a Docker image, image is built and stored in local docker registry
• Image can be found with docker images command
• Image is kept indifinitely and can become outdated

Expected

• Image should not be kept indifinitely
• User may want to delete image right after it is used

Expected

• Plasmactl could provide the option to remove built image after action is executed, whether it succeeds or not
• Option -rmi or --remove-image would automatically remove the image

[iignatevich]

#15

[davidferlay]

Working fine with ./launchr_Linux_x86_64 platform:test --remove-image

Image "platform-actions-compare-artifact:latest" doesn't exist locally, building...
Step 1/9 : FROM alpine:3.18
 ---> b541f2080109
Step 2/9 : RUN apk update --no-cache --quiet &&     apk upgrade --no-cache -a
 ---> Using cache
 ---> 99a1764c2f7e
Step 3/9 : RUN apk add --no-cache --quiet git curl diffutils
 ---> Using cache
 ---> 58090ed0f82a
Step 4/9 : ARG USER_ID
 ---> Using cache
 ---> 32378c4337e7
Step 5/9 : ARG GROUP_ID
 ---> Using cache
 ---> a9d4e745289f
Step 6/9 : RUN echo ${USER_ID}
 ---> Using cache
 ---> ec27ced977b0
Step 7/9 : RUN echo ${GROUP_ID}
 ---> Using cache
 ---> 76032574ec1b
Step 8/9 : RUN adduser -D -u $USER_ID -g $GROUP_ID plasma || true
 ---> Using cache
 ---> 328f01dd60b3
Step 9/9 : USER plasma
 ---> Running in 1494f6cc0298
 ---> 80cc5d6aed2b
Successfully built 80cc5d6aed2b
Successfully tagged platform-actions-compare-artifact:latest
+ pwd
/host
+ ls -lah /
+ grep host
drwxrwxrwx    1 plasma   plasma       566 Dec  5 15:07 host
+ id
uid=1000(plasma) gid=1000(plasma) groups=1000(plasma)
+ rm -rf new_file
+ echo YAY
+ ls -lah
+ grep new_file
-rw-r--r--    1 plasma   plasma         4 Dec  5 15:08 new_file
Image "platform-actions-compare-artifact:latest" was successfuly removed

However, I believe it would be better to have that behavior by default, and have an option to keep built image