5 releases (3 breaking)
0.4.0 | Apr 21, 2024 |
---|---|
0.3.0 | Dec 29, 2018 |
0.2.6 | Dec 14, 2018 |
0.2.0 | Nov 11, 2018 |
0.1.0 | Nov 6, 2018 |
#54 in Email
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notcoal - notmuch filters, not made from (char)coal
notcoal
provides both a library as well as a standalone binary. The latter can be used as an
"initial tagging" system, the former may be integrated into a bigger e-mail client making use of
notmuch-rs.
What?
Takes regex rules from a JSON file and if any match, either adds new tags, removes tags or runs an arbitrary binaries for further processing. Rules support AND as well as OR operations.
Example
[{
"name": "money",
"desc": "Money stuff",
"rules": [
{"from": "@(real\\.bank|gig-economy\\.career)",
"subject": ["report", "month" ]},
{"from": "no-reply@trusted\\.bank",
"subject": "statement"}
],
"op": {
"add": "€£$",
"rm": ["inbox", "unread"],
"run": ["any-binary-in-our-path-or-absolute-path", "--argument"]
}
}]
Here the matching expands to:
( from: ("@real.bank" OR "@gig-economy.career") AND subject: ("report" AND "month") )
OR
( from: "no-reply@trusted.bank" AND subject: "statement" )
If if this filter is applied the operations will
- add the tag
€£$
- remove the tags
inbox
andunread
- run the equivalent of
/bin/sh -c 'any-binary-in-our-path-or-absolute-path --argument'
with 3 additional environment variables:
NOTCOAL_FILTER_NAME=money
NOTCOAL_FILE_NAME=/path/to/maildir/new/filename
NOTCOAL_MSG_ID=e81cadebe7dab1cc6fac7e6a41@some-isp
Filters aren't only restricted to matching from
and subject
headers (all of which are treated
case-insensitive) but may try to match arbitrary headers.
Additionally there are the special match fields:
@path
: matches on the full path of a message@tags
: matches on tags already set by previous filters@thread-tags
: matches on tags already present in the message's thread@attachment
: matches on an attachment name@attachment-body
: matches on everytext/plain
attachment's body@body
: matches on the messages body
The default notcoal::filter
function loops through messages and then tests/applies filters in the
order they have been defined in. Hence, any tag one wants to match on has to have been set by a
previous matching rule.
Standalone use for "initial tagging"
To install the standalone helper binary, the simplest way is:
cargo install --locked notcoal --features=standalone
notcoal
will use the same default database as notmuch itself, and the default location for the
rules file is in $notmuchdb/.notmuch/hooks/notcoal-rules.json
. It also expects all newly added
messages (that are to be filtered) to have the new
tag. To make sure that's being set, edit your
.notmuch-config
to include:
[new]
tags=unread;inbox;new;
Additionally, notcoal
will respect the config file's maildir synchronize setting.
See notcoal --help
for supplying alternative values.
If you're fine with the defaults, you can symlink $notmuchdb/.notmuch/hooks/post-new
to the
notcoal
binary.
Thanks
vhdirk for notmuch-rs
, which made this crate possible in the first place, korrat for a patch
for more sensible database discovery, antifuchs' gmail-britta for inspiring the name, and
Recurse Center, for creating a supportive environment 💟
Dependencies
~8–20MB
~295K SLoC