[bug#44501] [PATCH] gnu: Add mblaze.

["B. Wilson via Guix-patches" via <guix-patches@gnu.org>]

* gnu/packages/mail.scm (mblaze): New variable.
---
 gnu/packages/mail.scm | 47 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 47 insertions(+)

diff --git a/gnu/packages/mail.scm b/gnu/packages/mail.scm
index 44a156fd99..3d3e8ab540 100644
--- a/gnu/packages/mail.scm
+++ b/gnu/packages/mail.scm
@@ -37,6 +37,7 @@
 ;;; Copyright © 2020 Alexey Abramov <levenson@mmer.org>
 ;;; Copyright © 2020 Tim Gesthuizen <tim.gesthuizen@yahoo.de>
 ;;; Copyright © 2020 Alexandru-Sergiu Marton <brown121407@posteo.ro>
+;;; Copyright © 2020 B. Wilson <elaexuotee@wilsonb.com>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -3960,3 +3961,49 @@ black lists.  Each message is analysed by Rspamd and given a spam
 score.")
     (home-page "https://www.rspamd.com/")
     (license license:asl2.0)))
+
+(define-public mblaze
+  (package
+    (name "mblaze")
+    (version "0.2")
+    (source
+     (origin
+       (method git-fetch)
+       (uri (git-reference
+             (url "https://github.com/leahneukirchen/mblaze")
+             (commit (string-append "v" version))))
+       (file-name (git-file-name name version))
+       (sha256
+        (base32 "0p97zfl35ilrnrx9ynj82igsb698m9klikfaicw5jhjpf6qp2n3y"))))
+    (build-system gnu-build-system)
+    (native-inputs `(("perl" ,perl)))
+    (arguments
+     `(#:tests? #f        ; XXX: Upstream tests appear to be broken
+       #:make-flags (list "CC=gcc" "PREFIX="
+                          (string-append "DESTDIR=" %output))
+       #:phases (modify-phases %standard-phases (delete 'configure))))
+    (home-page "https://github.com/leahneukirchen/mblaze")
+    (synopsis "Unix utilities to deal with Maildir")
+    (description
+     "The mblaze message system is a set of Unix utilities for processing and
+interacting with mail messages which are stored in maildir folders.
+
+Its design is roughly inspired by MH, the RAND Message Handling System, but it
+is a complete implementation from scratch.
+
+mblaze is a classic command line MUA and has no features for receiving or
+transferring messages; you can operate on messages in a local maildir spool, or
+fetch your messages using fdm(1), getmail(1), offlineimap(1), or similar
+utilities, and send it using dma(8), msmtp(1), sendmail(8), as provided by
+OpenSMTPD, Postfix, or similar.
+
+mblaze operates directly on maildir folders and doesn't use its own caches or
+databases.  There is no setup needed for many uses.  All utilities have been
+written with performance in mind.  Enumeration of all messages in a maildir
+is avoided unless necessary, and then optimized to limit syscalls.  Parsing
+message metadata is optimized to limit I/O requests.  Initial operations on a
+large maildir may feel slow, but as soon as they are in the file system cache,
+everything is blazingly fast.  The utilities are written to be memory efficient
+(i.e. not wasteful), but whole messages are assumed to fit into RAM easily
+(one at a time).")
+    (license license:public-domain)))
-- 
2.29.2