$ bashbrew --help
NAME:
bashbrew - canonical build tool for the official images
USAGE:
bashbrew [global options] command [command options] [arguments...]
COMMANDS:
list, ls list repo:tag combinations for a given repo
build build (and tag) repo:tag combinations for a given repo
tag tag repo:tag into a namespace (especially for pushing)
push push namespace/repo:tag (see also "tag")
put-shared update shared tags in the registry (and multi-architecture tags)
help, h Shows a list of commands or help for one command
plumbing:
children, offspring, descendants, progeny print the repos built FROM a given repo or repo:tag
parents, ancestors, progenitors print the repos this repo or repo:tag is FROM
cat print manifest contents for repo or repo:tag
from print FROM for repo:tag
GLOBAL OPTIONS:
--debug enable more output (esp. all "docker build" output instead of only output on failure) [$BASHBREW_DEBUG]
--no-sort do not apply any sorting, even via --build-order
--arch value the current platform architecture (default: "amd64") [$BASHBREW_ARCH]
--constraint value build constraints (see Constraints in Manifest2822Entry) [$BASHBREW_CONSTRAINTS]
--exclusive-constraints skip entries which do not have Constraints
--arch-namespace value architecture to push namespace mappings for creating indexes/manifest lists ("arch=namespace" ala "s390x=tianons390x") [$BASHBREW_ARCH_NAMESPACES]
--config value where default "flags" configuration can be overridden more persistently (default: "/home/tianon/.config/bashbrew") [$BASHBREW_CONFIG]
--library value where the bodies are buried (default: "/home/tianon/docker/official-images/library") [$BASHBREW_LIBRARY]
--cache value where the git wizardry is stashed (default: "/home/tianon/.cache/bashbrew") [$BASHBREW_CACHE]
--help, -h, -? show helpPre-built binaries are available to download from Jenkins (for a large variety of supported architectures).
For building bashbrew yourself, there are clues in bashbrew.sh and .travis.yml (although it's a pretty standard Go application).
Docker version 1.10 or above is required for use of Bashbrew.
In general, bashbrew build some-repo or bashbrew build ./some-file should be sufficient for using the tool at a surface level, especially for testing. For more complex usage, please see the built-in help (bashbrew --help, bashbrew build --help, etc).
The default "flags" configuration is in ~/.config/bashbrew/flags, but the base path can be overridden with --config or BASHBREW_CONFIG (technically, the full path to the flags configuration file is ${BASHBREW_CONFIG:-${XDG_CONFIG_HOME:-$HOME/.config}/bashbrew}/flags).
To set a default namespace for specific commands only:
Commands: tag, push
Namespace: officialstaging
To set a default namespace for all commands:
Namespace: jsmith
A more complex example:
# comments are allowed anywhere (and are ignored)
Library: /mnt/docker/official-images/library
Cache: /mnt/docker/bashbrew-cache
Constraints: aufs, docker-1.9, tianon
ExclusiveConstraints: true
# namespace just "tag" and "push" (not "build")
Commands: tag, push
Namespace: tianon
Commands: list
ApplyConstraints: true
Commands: tag
Debug: true
In this example, bashbrew tag will get both Namespace and Debug applied.