1 files changed, 34 insertions, 0 deletions
diff --git a/lisp/ldg-exec.el b/lisp/ldg-exec.el
new file mode 100644
index 00000000..3881f8e9
--- /dev/null
+++ b/lisp/ldg-exec.el
@@ -0,0 +1,34 @@
+(defgroup ledger-exec nil
+  "Interface to the Ledger command-line accounting program."
+  :group 'ledger)
+
+(defcustom ledger-binary-path "ledger"
+  "Path to the ledger executable."
+  :type 'file
+  :group 'ledger)
+
+(defun ledger-exec-ledger (input-buffer &optional output-buffer &rest args)
+  "Run Ledger."
+  (if (null ledger-binary-path)
+      (error "The variable `ledger-binary-path' has not been set"))
+  (let ((buf (or input-buffer (current-buffer)))
+	(outbuf (or output-buffer
+		    (generate-new-buffer " *ledger-tmp*"))))
+    (with-current-buffer buf
+      (let ((coding-system-for-write 'utf-8)
+	    (coding-system-for-read 'utf-8))
+	(apply #'call-process-region
+	       (append (list (point-min) (point-max)
+			     ledger-binary-path nil outbuf nil "-f" "-")
+		       args)))
+      outbuf)))
+
+(defun ledger-exec-read (&optional input-buffer &rest args)
+  (with-current-buffer
+      (apply #'ledger-exec-ledger input-buffer nil "emacs" args)
+    (goto-char (point-min))
+    (prog1
+	(read (current-buffer))
+      (kill-buffer (current-buffer)))))
+
+(provide 'ldg-exec)