update readme

README.org

@@ -23,6 +23,7 @@
   - [[#feather-keyword][:feather keyword]]
   - [[#el-get-keyword][:el-get keyword]]
   - [[#straight-keyword][:straight keyword]]
+  - [[#elpaca-keyword][:elpaca keyword]]
   - [[#ensure-system-package-keyword][:ensure-system-package keyword]]
 - [[#bind-keywords][Bind keywords]]
   - [[#bind-bind-keywords][:bind, :bind* keywords]]
@@ -438,6 +439,100 @@ Given a list, the arguments are passed as is to ~straight-use-package~.
          (leaf-init)))))
 #+end_src
 
+** :elpaca keyword
+~:eplaca~ provides a frontend for ~elpaca~.
+
+If you specify ~t~, leaf assumes that you specified the name of the leaf-block.
+
+Given a list, the arguments are passed as is to ~elpaca~.
+
+#+begin_src elisp
+(cort-deftest-with-macroexpand leaf/elpaca
+  '(((leaf leaf
+       :init (leaf-pre-init)
+       :elpaca t
+       :config (leaf-init))
+     (prog1 'leaf
+       (elpaca 'leaf
+         (leaf-pre-init)
+         (leaf-init))))
+
+    ((leaf leaf
+       :init (leaf-pre-init)
+       :elpaca nil t
+       :config (leaf-init))
+     (prog1 'leaf
+       (leaf-pre-init)
+       (leaf-init)))
+
+    ((leaf leaf
+       :init (leaf-pre-init)
+       :elpaca leaf leaf-polyfill
+       :config (leaf-init))
+     (prog1 'leaf
+       (elpaca 'leaf)
+       (elpaca 'leaf-polyfill
+         (leaf-pre-init)
+         (leaf-init))))
+
+    ((leaf leaf
+       :init (leaf-pre-init)
+       :elpaca t
+       :elpaca leaf-polyfill
+       :config (leaf-init))
+     (prog1 'leaf
+       (elpaca 'leaf)
+       (elpaca 'leaf-polyfill
+         (leaf-pre-init)
+         (leaf-init))))
+
+    ((leaf leaf
+       :init (leaf-pre-init)
+       :elpaca t leaf-polyfill
+       :config (leaf-init))
+     (prog1 'leaf
+       (elpaca 'leaf)
+       (elpaca 'leaf-polyfill
+         (leaf-pre-init)
+         (leaf-init))))
+
+    ((leaf leaf
+       :init (leaf-pre-init)
+       :elpaca (zenburn-theme :host github :repo "fake/fake")
+       :config (leaf-init))
+     (prog1 'leaf
+       (elpaca '(zenburn-theme :host github :repo "fake/fake")
+         (leaf-pre-init)
+         (leaf-init))))
+
+    ((leaf leaf
+       :init (leaf-pre-init)
+       :elpaca
+       (zenburn-theme :host github :repo "fake/fake")
+       (yaicomplete :host github :repo "fake/faker")
+       (mew :host gitlab :repo "fake/fakest")
+       :config (leaf-init))
+     (prog1 'leaf
+       (elpaca '(zenburn-theme :host github :repo "fake/fake"))
+       (elpaca '(yaicomplete :host github :repo "fake/faker"))
+       (elpaca '(mew :host gitlab :repo "fake/fakest")
+         (leaf-pre-init)
+         (leaf-init))))))
+#+end_src
+
+Nesting is not recommended in elpaca.
+If nesting is used, please specify them together in the first leaf block.
+#+begin_src elisp
+(leaf leaf
+  :elpaca leaf leaf-polyfill
+  :config
+  (leaf-init)
+  (leaf leaf-polyfill
+    :elpaca nil
+    :config
+    (leaf-polyfill-init)))
+#+end_src
+
 ** :ensure-system-package keyword
 ~:ensure-system-package~ provides a frontend for [[https://gitlab.com/jabranham/system-packages][system-packages]].