Add golden-ratio to Emacs configuration

oni/home/config/rincewind.scm

@@ -76,7 +76,8 @@
                           home-emacs-dashboard-configuration
                           home-emacs-eros-service-type
                           home-emacs-ace-link-service-type
-                          home-emacs-ace-link-configuration))
+                          home-emacs-ace-link-configuration
+                          home-emacs-golden-ratio-service-type))
   #:use-module ((oni home services environment)
                 #:select (home-environment-service))
   #:use-module ((oni home services flameshot)
@@ -427,6 +428,7 @@
              (default-key "C-S-e")
              (goto-address-key "C-S-e")
              (org-mode-key "C-S-e")))
+   (service home-emacs-golden-ratio-service-type)
 
    (service home-flameshot-service-type)
 

oni/home/services/emacs.scm

@@ -30,7 +30,8 @@
   #:use-module ((guix packages)
                 #:select (package?))
   #:use-module ((oni packages emacs)
-                #:select (emacs-yasnippet-capf))
+                #:select (emacs-yasnippet-capf
+                          emacs-golden-ratio))
 
   #:export (home-emacs-service-type
             home-emacs-configuration
@@ -48,7 +49,10 @@
             home-emacs-eros-configuration
 
             home-emacs-ace-link-service-type
-            home-emacs-ace-link-configuration))
+            home-emacs-ace-link-configuration
+
+            home-emacs-golden-ratio-service-type
+            home-emacs-golden-ratio-configuration))
 
 (define-maybe string)
 
@@ -298,3 +302,40 @@
    (compose identity)
    (default-value (home-emacs-ace-link-configuration))
    (description "Install and configure emacs-ace-link.")))
+
+(define-configuration/no-serialization home-emacs-golden-ratio-configuration
+  (package
+    (package emacs-golden-ratio)
+    "Package to use for setting emacs-golden-ratio.")
+  (configurations
+   (text-config '())
+   "Configuration for emacs-golden-ratio."))
+
+(define (add-emacs-golden-ratio-configuration config)
+  (home-emacs-extension
+   (configurations
+    (append
+     (list (mixed-text-file "golden-ratio-config"
+                            ";;;;; golden-ratio-config starts here.\n"
+                            "(golden-ratio-mode)\n"
+                            "(with-eval-after-load 'ace-window\n"
+                            "  (advice-add 'ace-window :after #'golden-ratio))\n"
+                            ";;;;; golden-ratio-config ends here.\n"))
+     (home-emacs-golden-ratio-configuration-configurations config)))))
+
+(define (add-emacs-golden-ratio-packages config)
+  (list (home-emacs-golden-ratio-configuration-package config)))
+
+(define home-emacs-golden-ratio-service-type
+  (service-type
+   (name 'home-emacs-golden-ratio)
+   (extensions
+    (list (service-extension
+           home-emacs-service-type
+           add-emacs-golden-ratio-configuration)
+          (service-extension
+           home-profile-service-type
+           add-emacs-golden-ratio-packages)))
+   (compose identity)
+   (default-value (home-emacs-golden-ratio-configuration))
+   (description "Install and configure emacs-golden-ratio.")))

oni/packages/emacs.scm

@@ -444,3 +444,31 @@ new-theme for a while. I couldn't think of a name so I named it after him.")
     (description
      "This package provides an Emacs-based interface to the Notmuch mail
 system.")))
+
+(define-public emacs-golden-ratio
+  (let ((commit "375c9f287dfad68829582c1e0a67d0c18119dab9")
+        (revision "0"))
+    (package
+      (name "emacs-golden-ratio")
+      (version (git-version "1.0.0" revision commit))
+      (source
+       (origin
+         (uri (git-reference
+               (url "https://github.com/roman/golden-ratio.el.git")
+               (commit commit)))
+         (method git-fetch)
+         (file-name (git-file-name name version))
+         (sha256
+          (base32 "0a635a3h6jx0clgwmhwc48i14y3xy5q29y37lp2sjnbxx1hlmkli"))))
+      (build-system emacs-build-system)
+      (home-page "https://github.com/roman/golden-ratio.el")
+      (synopsis "Automatic resizing of Emacs windows to the golden ratio")
+      (description "When working with many windows at the same time, each window has a size that is
+not convenient for editing.
+
+golden-ratio helps on this issue by resizing automatically the windows you are
+working on to the size specified in the \"Golden Ratio\". The window that has
+the main focus will have the perfect size for editing, while the ones that are
+not being actively edited will be re-sized to a smaller size that doesn't get in
+the way, but at the same time will be readable enough to know it's content.")
+      (license license:expat))))