Smart Docker Build

Intro

• Build a Docker image using only the Dockerfile.
• Tag calculation based on Dockerfile data.
• Build only after finding changes.
• Gathering facts after assembly.
• Create and publish tags using the collected facts.

Usage

$ cat examples/Dockerfile.example 
FROM alpine:latest

$ ./sdb examples/Dockerfile.example
smart docker build
 -> file examples/Dockerfile.example
 --> (abatalev/example:47e00eaa) image exists. build skipped
 --> gathering facts
 ---> fact: os-name = alpine
 ---> fact: os-version = 3.21.0
 --> create tags
 ---> mask $os-name|-|@os-version
 ----> tag alpine-3
 ----> tag alpine-3.21
 ----> tag alpine-3.21.0

 $ docker image list | grep example
abatalev/example  47e00eaa       4048db5d3672  6 weeks ago  7.83MB
abatalev/example  alpine-3       4048db5d3672  6 weeks ago  7.83MB
abatalev/example  alpine-3.21    4048db5d3672  6 weeks ago  7.83MB
abatalev/example  alpine-3.21.0  4048db5d3672  6 weeks ago  7.83MB

Build

go build -o sdb .

Usage

sdb build/Dockerfile.example

for develop

./mk.sh

TO DO

• fix golangci-lint

• enable linters

• coverage: 90%

• use kaniko? (gcr.io/kaniko-project/executor:v1.23.2) -- build and push to registry -- q: tags?