B4(5)

NAME
B4 - Work with code submissions in a public-inbox archive

SYNOPSIS

b4 {mbox,am,attest,pr,ty,diff} [options]

DESCRIPTION

This is a helper utility to work with patches and pull requests made available via a public-inbox archive like lore.kernel.org. It is written to make it easier to participate in a patch-based workflows, like those used in the Linux kernel development.

The name "b4" was chosen for ease of typing and because B-4 was the precursor to Lore and Data in the Star Trek universe.

SUBCOMMANDS

•   b4 mbox: Download a thread as an mbox file

•   b4 am: Create an mbox file that is ready to git-am

•   b4 pr: Work with pull requests

•   b4 diff: Show range-diff style diffs between patch versions

•   b4 ty: Create templated replies for processed patches and pull requests

•   b4 attest: (EXPERIMENTAL) Add cryptographic attestation to patches

•   b4 kr (EXPERIMENTAL) Operate on patatt-compatible keyrings

OPTIONS

-h, --help
    show this help message and exit

-d, --debug
    Add more debugging info to the output (default: False)

-q, --quiet
    Output critical information only (default: False)

SUBCOMMAND OPTIONS

  b4 mbox

usage:
    b4 mbox [-h] [-o OUTDIR] [-p USEPROJECT] [-c] [-n WANTNAME] [-m LOCALMBOX] [msgid]

positional arguments:
    msgid Message ID to process, or pipe a raw message

optional arguments:

-h, --help
    show this help message and exit

-o OUTDIR, --outdir OUTDIR
    Output into this directory (or use - to output mailbox contents to stdout)

-p USEPROJECT, --use-project USEPROJECT
    Use a specific project instead of guessing (linux-mm, linux-hardening, etc)

-c, --check-newer-revisions
    Check if newer patch revisions exist

-n WANTNAME, --mbox-name WANTNAME
    Filename to name the mbox file

-m LOCALMBOX, --use-local-mbox LOCALMBOX
    Instead of grabbing a thread from lore, process this mbox file (or use - for stdin)

-C, --no-cache
    Do not use local cache

-f, --filter-dupes
    When adding messages to existing maildir, filter out duplicates

-M, --save-as-maildir
    Save as maildir (avoids mbox format ambiguities)

    Example: b4 mbox 20200313231252.64999-1-keescook@chromium.org

  b4 am

usage:
    b4 am [-h] [-o OUTDIR] [-p USEPROJECT] [-c] [-n WANTNAME] [-m LOCALMBOX] [-v WANTVER] [-t] [-T] [-s] [-l] [-Q] [msgid]

positional arguments:
    msgid Message ID to process, or pipe a raw message

optional arguments:

-h, --help
    show this help message and exit

-o OUTDIR, --outdir OUTDIR
    Output into this directory (or use - to output mailbox contents to stdout)

-p USEPROJECT, --use-project USEPROJECT
    Use a specific project instead of guessing (linux-mm, linux-hardening, etc)

-c, --check-newer-revisions
    Check if newer patch revisions exist

-n WANTNAME, --mbox-name WANTNAME
    Filename to name the mbox file

-m LOCALMBOX, --use-local-mbox LOCALMBOX
    Instead of grabbing a thread from lore, process this mbox file (or use - for stdin)

-M, --save-as-maildir
    Save as maildir (avoids mbox format ambiguities)

-C, --no-cache
    Do not use local cache

-v WANTVER, --use-version WANTVER
    Get a specific version of the patch/series

-t, --apply-cover-trailers
    Apply trailers sent to the cover letter to all patches

-S, --sloppy-trailers
    Apply trailers without email address match checking

-T, --no-add-trailers
    Do not add or sort any trailers

-s, --add-my-sob
    Add your own signed-off-by to every patch

-l, --add-link
    Add a lore.kernel.org/r/ link to every patch

-Q, --quilt-ready
    Save patches in a quilt-ready folder

-P CHERRYPICK, --cherry-pick CHERRYPICK
    Cherry-pick a subset of patches (e.g. "-P 1-2,4,6-", "-P _" to use just the msgid specified, or "-P *globbing*" to match on commit subject)

-g, --guess-base
    Try to guess the base of the series (if not specified)

-3, --prep-3way
    Prepare for a 3-way merge (tries to ensure that all index blobs exist by making a fake commit range)

--cc-trailers
    Copy all Cc'd addresses into Cc: trailers, if not already present

--no-cover
    Do not save the cover letter (on by default when using -o -)

--no-partial-reroll
    Do not reroll partial series when detected

    Example: b4 am 20200313231252.64999-1-keescook@chromium.org

  b4 attest

usage: b4 attest [-h] patchfile [patchfile ...]

positional arguments:
    patchfile Patches to attest

    Example: b4 attest outgoing/*.patch

  b4 pr

usage:
    command.py pr [-h] [-g GITDIR] [-b BRANCH] [-c] [-e] [-o OUTMBOX] [msgid]

positional arguments:
    msgid Message ID to process, or pipe a raw message

optional arguments:

-h, --help
    show this help message and exit

-g GITDIR, --gitdir GITDIR
    Operate on this git tree instead of current dir

-b BRANCH, --branch BRANCH
    Check out FETCH_HEAD into this branch after fetching

-c, --check
    Check if pull request has already been applied

-e, --explode
    Convert a pull request into an mbox full of patches

-o OUTMBOX, --output-mbox OUTMBOX
    Save exploded messages into this mailbox (default: msgid.mbx)

-l, --retrieve-links
    Attempt to retrieve any Link: URLs (use with -e)

-f MAILFROM, --from-addr MAILFROM
    Use this From: in exploded messages (use with -e)

    Example: b4 pr 202003292120.2BDCB41@keescook

  b4 ty

usage:
    b4 ty [-h] [-g GITDIR] [-o OUTDIR] [-l] [-s SEND [SEND ...]] [-d DISCARD [DISCARD ...]] [-a] [-b BRANCH] [--since SINCE]

optional arguments:

-h, --help
    show this help message and exit

-g GITDIR, --gitdir GITDIR
    Operate on this git tree instead of current dir

-o OUTDIR, --outdir OUTDIR
    Write thanks files into this dir (default=.)

-l, --list
    List pull requests and patch series you have retrieved

-s SEND, --send SEND
    Generate thankyous for specific entries from -l (e.g.: 1,3-5,7-; or "all")

-d DISCARD, --discard DISCARD
    Discard specific messages from -l (e.g.: 1,3-5,7-; or "all")

-a, --auto
    Use the Auto-Thankanator to figure out what got applied/merged

-b BRANCH, --branch BRANCH
    The branch to check against, instead of current

--since SINCE
    The --since option to use when auto-matching patches (default=1.week)

    Example: b4 ty --auto

  b4 diff

usage: b4 diff [-h] [-g GITDIR] [-p USEPROJECT] [-C] [-v WANTVERS [WANTVERS ...]] [-n] [-o OUTDIFF] [-c] [-m AMBOX AMBOX] [msgid]

positional arguments:
    msgid Message ID to process, pipe a raw message, or use -m

    optional arguments:

-h, --help
    show this help message and exit

-g GITDIR, --gitdir GITDIR
    Operate on this git tree instead of current dir

-p USEPROJECT, --use-project USEPROJECT
    Use a specific project instead of guessing (linux-mm, linux-hardening, etc)

-C, --no-cache
    Do not use local cache

-v WANTVERS [WANTVERS ...], --compare-versions WANTVERS [WANTVERS ...]
    Compare specific versions instead of latest and one before that, e.g. -v 3 5

-n, --no-diff
    Do not generate a diff, just show the command to do it

-o OUTDIFF, --output-diff OUTDIFF
    Save diff into this file instead of outputting to stdout

-c, --color
    Force color output even when writing to file

-m AMBOX AMBOX, --compare-am-mboxes AMBOX AMBOX
    Compare two mbx files prepared with "b4 am"

    Example: b4 diff 20200526205322.23465-1-mic@digikod.net

  b4 kr

usage: b4 kr [-h] [-p USEPROJECT] [-m LOCALMBOX] [-C] [--show-keys] [msgid]

positional arguments:
    msgid Message ID to process, or pipe a raw message

optional arguments:

-h, --help
    show this help message and exit

-p USEPROJECT, --use-project USEPROJECT
    Use a specific project instead of guessing (linux-mm, linux-hardening, etc)

-m LOCALMBOX, --use-local-mbox LOCALMBOX
    Instead of grabbing a thread from lore, process this mbox file (or - for stdin)

-C, --no-cache
    Do not use local cache

--show-keys
    Show all developer keys from the thread

    Example: b4 kr --show-keys 20210521184811.617875-1-konstantin@linuxfoundation.org

CONFIGURATION

B4 configuration is handled via git-config(1), so you can store it in either the toplevel $HOME/.gitconfig file, or in a per-repository .git/config file if your workflow changes per project.

Default configuration, with explanations:

[b4]
   # Where to look up threads by message id
   midmask = https://lore.kernel.org/r/%s
   #
   # When recording Link: trailers, use this mask
   linkmask = https://lore.kernel.org/r/%s
   #
   # When duplicate messages exist, use the following order to decide
   # which list-id is likely to have the least mangled version. Default
   # preference is listed below, in the order of lists most likely to
   # preserve proper DKIM validation. Use shell-style globbing and
   # separate multiple entries with commas. Must end with ,*
   listid-preference = *.feeds.kernel.org,*.linux.dev,*.kernel.org,*
   #
   # Set to "yes" to save maildirs instead of mailboxes
   # This will help avoid mboxo/mboxrd format inconsistencies between
   # public-inbox, python, and git
   save-maildirs = no
   #
   # When processing thread trailers, sort them in this order.
   # Can use shell-globbing and must end with ,*
   # Some sorting orders:
   #trailer-order=link*,fixes*,cc*,reported*,suggested*,original*,co-*,tested*,reviewed*,acked*,signed-off*,*
   #trailer-order = fixes*,reported*,suggested*,original*,co-*,signed-off*,tested*,reviewed*,acked*,cc*,link*,*
   trailer-order = _preserve_
   #
   # Attestation-checking configuration parameters
   # off: do not bother checking attestation
   # check: print an attaboy when attestation is found
   # softfail: print a warning when no attestation found
   # hardfail: exit with an error when no attestation found
   attestation-policy = softfail
   #
   # Perform DKIM attestation?
   attestation-check-dkim = yes
   #
   # When showing attestation check results, do you like "fancy" (color, unicode)
   # or simple markers?
   attestation-checkmarks = fancy
   #
   # How long before we consider attestation to be too old?
   attestation-staleness-days = 30
   #
   # You can point this at a non-default home dir, if you like, or leave out to
   # use the OS default.
   attestation-gnupghome = None
   #
   # If this is not set, we'll use what we find in
   # git-config for gpg.program; and if that's not set,
   # we'll use "gpg" and hope for the best
   gpgbin = None
   #
   # How long to keep downloaded threads in cache (minutes)?
   cache-expire = 10
   # Used when creating summaries for b4 ty, and can be set to a value like
   # thanks-commit-url-mask = https://git.kernel.org/username/c/%.12s
   # See this page for more info on convenient git.kernel.org shorterners:
   # https://korg.wiki.kernel.org/userdoc/git-url-shorterners
   thanks-commit-url-mask = None
   # See thanks-pr-template.example. If not set, a default template will be used.
   thanks-pr-template = None
   # See thanks-am-template.example. If not set, a default template will be used.
   thanks-am-template = None

SUPPORT

Please email tools@linux.kernel.org with support requests, or browse the list archive at https://lore.kernel.org/tools.

AUTHOR
mricon@kernel.org License: GPLv2+

COPYRIGHT
The Linux Foundation and contributors