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.TH B4 5 "2020-03-23" "0.3.4" ""
.SH NAME
B4 \- Work with patches in a public-inbox archive
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.SH SYNOPSIS
.sp
b4 {mbox,am,attest,attverify} [options]
.SH DESCRIPTION
.sp
This is a helper utility to work with patches 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.
.sp
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.
.SH SUBCOMMANDS
.INDENT 0.0
.IP \(bu 2
\fIb4 mbox\fP: Download a thread as an mbox file
.IP \(bu 2
\fIb4 am\fP: Create an mbox file that is ready to git\-am
.IP \(bu 2
\fIb4 attest\fP: Submit cryptographic attestation for patches
.UNINDENT
.SH OPTIONS
.INDENT 0.0
.TP
.B \-h\fP,\fB  \-\-help
show this help message and exit
.TP
.B \-d\fP,\fB  \-\-debug
Add more debugging info to the output (default: False)
.TP
.B \-q\fP,\fB  \-\-quiet
Output critical information only (default: False)
.UNINDENT
.SH SUBCOMMAND OPTIONS
.SS b4 mbox
.INDENT 0.0
.TP
.B usage:
b4 mbox [\-h] [\-o OUTDIR] [\-p USEPROJECT] [\-c] [\-n WANTNAME] [\-m LOCALMBOX] [msgid]
.TP
.B positional arguments:
msgid                 Message ID to process, or pipe a raw message
.TP
.B optional arguments:
.INDENT 7.0
.TP
.B \-h\fP,\fB  \-\-help
show this help message and exit
.TP
.BI \-o \ OUTDIR\fP,\fB \ \-\-outdir \ OUTDIR
Output into this directory
.TP
.BI \-p \ USEPROJECT\fP,\fB \ \-\-use\-project \ USEPROJECT
Use a specific project instead of guessing (linux\-mm,
linux\-hardening, etc)
.TP
.B \-c\fP,\fB  \-\-check\-newer\-revisions
Check if newer patch revisions exist
.TP
.BI \-n \ WANTNAME\fP,\fB \ \-\-mbox\-name \ WANTNAME
Filename to name the mbox file
.TP
.BI \-m \ LOCALMBOX\fP,\fB \ \-\-use\-local\-mbox \ LOCALMBOX
Instead of grabbing a thread from lore, process this
mbox file
.UNINDENT
.UNINDENT
.sp
\fIExample\fP: b4 mbox \fI\%20200313231252.64999\-1\-keescook@chromium.org\fP
.SS b4 am
.INDENT 0.0
.TP
.B usage:
b4 am [\-h] [\-o OUTDIR] [\-p USEPROJECT] [\-c] [\-n WANTNAME] [\-m LOCALMBOX] [\-v WANTVER] [\-t] [\-T] [\-s] [\-l] [\-Q] [msgid]
.TP
.B positional arguments:
msgid                 Message ID to process, or pipe a raw message
.TP
.B optional arguments:
.INDENT 7.0
.TP
.B \-h\fP,\fB  \-\-help
show this help message and exit
.TP
.BI \-o \ OUTDIR\fP,\fB \ \-\-outdir \ OUTDIR
Output into this directory
.TP
.BI \-p \ USEPROJECT\fP,\fB \ \-\-use\-project \ USEPROJECT
Use a specific project instead of guessing (linux\-mm,
linux\-hardening, etc)
.TP
.B \-c\fP,\fB  \-\-check\-newer\-revisions
Check if newer patch revisions exist
.TP
.BI \-n \ WANTNAME\fP,\fB \ \-\-mbox\-name \ WANTNAME
Filename to name the mbox file
.TP
.BI \-m \ LOCALMBOX\fP,\fB \ \-\-use\-local\-mbox \ LOCALMBOX
Instead of grabbing a thread from lore, process this
mbox file
.TP
.BI \-v \ WANTVER\fP,\fB \ \-\-use\-version \ WANTVER
Get a specific version of the patch/series
.TP
.B \-t\fP,\fB  \-\-apply\-cover\-trailers
Apply trailers sent to the cover letter to all patches
.TP
.B \-T\fP,\fB  \-\-no\-add\-trailers
Do not add or sort any trailers
.TP
.B \-s\fP,\fB  \-\-add\-my\-sob
Add your own signed\-off\-by to every patch
.TP
.B \-l\fP,\fB  \-\-add\-link
Add a lore.kernel.org/r/ link to every patch
.TP
.B \-Q\fP,\fB  \-\-quilt\-ready
Save mbox patches in a quilt\-ready folder
.UNINDENT
.UNINDENT
.sp
\fIExample\fP: b4 am \fI\%20200313231252.64999\-1\-keescook@chromium.org\fP
.SS b4 attest
.INDENT 0.0
.TP
.B usage:
b4 attest [\-h] [\-f SENDER] [\-n] [\-o OUTPUT] patchfile [patchfile ...]
.TP
.B positional arguments:
patchfile             Patches to attest
.TP
.B optional arguments:
.INDENT 7.0
.TP
.B \-h\fP,\fB  \-\-help
show this help message and exit
.TP
.BI \-f \ SENDER\fP,\fB \ \-\-from \ SENDER
Use a custom From field
.TP
.B \-n\fP,\fB  \-\-no\-submit
Do not submit attestation, just save the message ready
to send
.TP
.BI \-o \ OUTPUT\fP,\fB \ \-\-output \ OUTPUT
Save attestation message in this file if not
submitting it
.UNINDENT
.UNINDENT
.sp
\fIExample\fP: b4 attest \-n \-o output/xxxx\-attestation.patch output/*.patch
.SH CONFIGURATION
.sp
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.
.sp
Default configuration, with explanations:
.INDENT 0.0
.INDENT 3.5
.sp
.nf
.ft C
[b4]
   # Where to look up threads by message id
   midmask = https://lore.kernel.org/r/%s\(aq
   #
   # When recording Link: trailers, use this mask
   linkmask = https://lore.kernel.org/r/%s\(aq
   #
   # When processing thread trailers, use this order. Can use shell\-globbing
   # and must end with ,*
   # Common alternative order:
   #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*,*
   #
   # 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 = check
   #
   # "gpg" (whatever gpg is configured to do) or "tofu" to force TOFU mode
   # If you don\(aqt already have a carefully maintained web of trust setup, it is
   # strongly recommended to set this to "tofu"
   attestation\-trust\-model = gpg
   #
   # How strict should we be when comparing the email address in From to the
   # email addresses in the key\(aqs UIDs?
   # strict: must match one of the uids on the key to pass
   # loose: any valid and trusted key will be accepted
   attestation\-uid\-match = loose
   #
   # When showing attestation check results, do you like "fancy" (color, unicode)
   # or simple checkmarks?
   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\(aqll use what we find in
   # git\-config for gpg.program; and if that\(aqs not set,
   # we\(aqll use "gpg" and hope for the best
   gpgbin = None
   #
   # How long to keep downloaded threads in cache (minutes)?
   cache\-expire = 10
.ft P
.fi
.UNINDENT
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.SH SUPPORT
.sp
Please email \fI\%tools@linux.kernel.org\fP with support requests.
.SH AUTHOR
mricon@kernel.org

License: GPLv2+
.SH COPYRIGHT
The Linux Foundation and contributors
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