From 00e6e3d05d0fc485a08196060ec05a34823486f3 Mon Sep 17 00:00:00 2001
From: Jeremy Baxter <jeremy@baxters.nz>
Date: Wed, 1 May 2024 11:20:52 +1200
Subject: [PATCH] esv.el: add a package for integrating into Emacs

---
 esv.el | 53 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 53 insertions(+)
 create mode 100644 esv.el

diff --git a/esv.el b/esv.el
new file mode 100644
index 0000000..ff3182a
--- /dev/null
+++ b/esv.el
@@ -0,0 +1,53 @@
+;;; esv.el --- read the Bible from Emacs  -*- lexical-binding:t -*-
+
+(defgroup esv nil
+  "Read the Bible."
+  :prefix "esv-"
+  :group 'applications)
+
+(defcustom esv-columns 72
+  "Length of each line output by `esv'."
+  :type 'natnum
+  :group 'esv)
+(defcustom esv-mode-hook nil
+  "Hook run after entering `esv-mode'."
+  :type 'hook
+  :group 'esv)
+(defcustom esv-process "esv"
+  "Name of the process created by `esv'."
+  :type 'string
+  :group 'esv)
+(defcustom esv-program "esv"
+  "Path to or name of the program started by `esv'."
+  :type 'string
+  :group 'esv)
+
+(define-derived-mode esv-mode text-mode "ESV-Bible"
+  "Major mode used for reading the Bible with `esv'."
+  :group 'esv
+
+  (read-only-mode))
+
+(defun esv (book verses)
+  "Fetch the Bible passage identified by BOOK and VERSES.
+The result will be redirected to a buffer specified by `esv-buffer'."
+  (interactive "MBook: \nMVerses: ")
+  (let ((buffer (concat book " " verses)))
+    (catch 'buffer-exists
+      (when (get-buffer buffer)
+        (message "Buffer `%s' already exists" buffer)
+        (throw 'buffer-exists nil))
+      ;; execute esv
+      (call-process esv-program nil buffer t
+        ;; arguments
+        (format "-l%d" esv-columns) book verses)
+      ;; display buffer in another window
+      (display-buffer buffer)
+      ;; move point to the beginning of the buffer
+      (with-current-buffer buffer
+        (esv-mode)
+        (goto-char (point-min)))
+      (set-window-start (get-buffer-window buffer) (point-min))
+      t)))
+
+(provide 'esv)