Add custom emacs-notmuch package

This fixes a bug that exists in the package that the Notmuch logo doesn't show
up in notmuch-hello. I'll try and make a couple of other changes before opening
a pull request back to Guix to fix it.

oni/home/config/rincewind.scm

@@ -53,7 +53,8 @@
                 #:select (local-file
                           mixed-text-file))
   #:use-module ((guix packages)
-                #:select (package-name))
+                #:select (package-name
+                          package-input-rewriting))
   #:use-module ((guix transformations)
                 #:select (options->transformation))
   #:use-module ((nongnu packages emacs)
@@ -119,7 +120,8 @@
   #:use-module ((oni packages count-emails)
                 #:select (count-emails))
   #:use-module ((oni packages emacs)
-                #:select (emacs-inkplate))
+                #:select (emacs-inkplate
+                          oni-emacs-notmuch))
   #:use-module ((oni packages emacs-config)
                 #:select (emacs-oni-org-roam
                           emacs-oni-vterm
@@ -195,6 +197,9 @@
     `((with-branch . ,(string-append (package-name package) "=master"))))
    package))
 
+(define with-my-emacs-notmuch-package
+  (package-input-rewriting `((,emacs-notmuch . ,oni-emacs-notmuch))))
+
 (define rincewind-picom-service
   (service home-picom-service-type
            (home-picom-configuration
@@ -262,7 +267,6 @@
                  tmsu
                  mpd-random-albums
                  notmuch
-                 emacs-notmuch
                  emacs-inkplate
                  emacs-outli
                  emacs-guix
@@ -277,7 +281,7 @@
                  emacs-oni-common-lisp
                  emacs-oni-gui
                  emacs-oni-magit
-                 emacs-oni-notmuch
+                 (with-my-emacs-notmuch-package emacs-oni-notmuch)
                  emacs-oni-hy
                  emacs-oni-project
                  emacs-oni-bookmark

oni/packages/emacs.scm

@@ -2,10 +2,14 @@
   #:use-module (guix packages)
   #:use-module (guix utils)
   #:use-module (guix download)
+  #:use-module ((guix gexp)
+                #:select (gexp))
   #:use-module (guix git-download)
   #:use-module (guix build-system emacs)
   #:use-module ((guix licenses) #:prefix license:)
-  #:use-module (gnu packages emacs-xyz))
+  #:use-module (gnu packages emacs-xyz)
+  #:use-module ((gnu packages mail)
+                #:select (notmuch)))
 
 (define-public emacs-inkplate
   (let ((commit "0897721a7b3d84aa3f200ae85fddd5fdd370fc42")
@@ -412,3 +416,31 @@ new-theme for a while. I couldn't think of a name so I named it after him.")
       (synopsis "Completion-At-Point Extension for YASnippet")
       (description "A simple capf (Completion-At-Point Function) for completing yasnippet snippets.")
       (license license:gpl3))))
+
+(define-public oni-emacs-notmuch
+  (package
+    (inherit notmuch)
+    (name "oni-emacs-notmuch")
+    (build-system emacs-build-system)
+    (native-inputs '())
+    (inputs
+     (list notmuch))
+    (arguments
+     (list
+      #:exclude #~(cons* "make-deps.el" "rstdoc.el" %default-exclude)
+      #:include #~(cons* "notmuch-logo.svg" "notmuch-emacs-mua" %default-include)
+      #:phases
+      #~(modify-phases %standard-phases
+          (add-after 'unpack 'chdir
+            (lambda _
+              (chdir "emacs")))
+          (add-after 'chdir 'patch-paths
+            (lambda* (#:key inputs #:allow-other-keys)
+              (let ((notmuch (search-input-file inputs "/bin/notmuch")))
+                (substitute* "notmuch-lib.el"
+                  (("\"notmuch\"")
+                   (string-append "\"" notmuch "\"")))))))))
+    (synopsis "Run Notmuch within Emacs")
+    (description
+     "This package provides an Emacs-based interface to the Notmuch mail
+system.")))