X-Git-Url: https://git.notmuchmail.org/git?p=notmuch;a=blobdiff_plain;f=emacs%2Fnotmuch-lib.el;h=c3d76d22ab53339adf83cc8b11697023e8b46b7d;hp=9c4ee71811ed8e91b8378c96d2601533e39c5ad7;hb=66c935cff37fcab1ef7b0a5cecf5bc1c62d8d2ed;hpb=5382eebcdcdb50625c038c6caa89968d2f403bd1

diff --git a/emacs/notmuch-lib.el b/emacs/notmuch-lib.el
index 9c4ee718..c3d76d22 100644
--- a/emacs/notmuch-lib.el
+++ b/emacs/notmuch-lib.el
@@ -316,6 +316,75 @@ string), a property list of face attributes, or a list of these."
 	(put-text-property pos next 'face (cons face cur))
 	(setq pos next)))))
 
+(defun notmuch-pop-up-error (msg)
+  "Pop up an error buffer displaying MSG.
+
+This will accumulate error messages in the errors buffer until
+the user dismisses it."
+
+  (let ((buf (get-buffer-create "*Notmuch errors*")))
+    (with-current-buffer buf
+      (view-mode-enter nil #'kill-buffer)
+      (let ((inhibit-read-only t))
+	(goto-char (point-max))
+	(unless (bobp)
+	  (insert "\n"))
+	(insert msg)
+	(unless (bolp)
+	  (insert "\n"))))
+    (pop-to-buffer buf)))
+
+(defun notmuch-check-exit-status (exit-status command &optional output err-file)
+  "If EXIT-STATUS is non-zero, pop up an error buffer and signal an error.
+
+If EXIT-STATUS is non-zero, pop up a notmuch error buffer
+describing the error and signal an Elisp error.  EXIT-STATUS must
+be a number indicating the exit status code of a process or a
+string describing the signal that terminated the process (such as
+returned by `call-process').  COMMAND must be a list giving the
+command and its arguments.  OUTPUT, if provided, is a string
+giving the output of command.  ERR-FILE, if provided, is the name
+of a file containing the error output of command.  OUTPUT and the
+contents of ERR-FILE will be included in the error message."
+
+  ;; This is implemented as a cond to make it easy to expand.
+  (cond
+   ((eq exit-status 0) t)
+   (t
+    (notmuch-pop-up-error
+     (concat
+      (format "Error invoking notmuch.  %s exited with %s%s.\n"
+	      (mapconcat #'identity command " ")
+	      ;; Signal strings look like "Terminated", hence the
+	      ;; colon.
+	      (if (integerp exit-status) "status " "signal: ")
+	      exit-status)
+      (when err-file
+	(concat "Error:\n"
+		(with-temp-buffer
+		  (insert-file-contents err-file)
+		  (if (eobp)
+		      "(no error output)\n"
+		    (buffer-string)))))
+      (when (and output (not (equal output "")))
+	(format "Output:\n%s" output))))
+    ;; Mimic `process-lines'
+    (error "%s exited with status %s" (car command) exit-status))))
+
+(defun notmuch-call-notmuch-json (&rest args)
+  "Invoke `notmuch-command' with `args' and return the parsed JSON output.
+
+The returned output will represent objects using property lists
+and arrays as lists."
+
+  (with-temp-buffer
+    (apply #'call-process notmuch-command nil (list t nil) nil args)
+    (goto-char (point-min))
+    (let ((json-object-type 'plist)
+	  (json-array-type 'list)
+	  (json-false 'nil))
+      (json-read))))
+
 ;; Compatibility functions for versions of emacs before emacs 23.
 ;;
 ;; Both functions here were copied from emacs 23 with the following copyright:
@@ -465,15 +534,19 @@ Entering JSON objects is currently unimplemented."
   (with-current-buffer (notmuch-json-buffer jp)
     ;; Disallow terminators
     (setf (notmuch-json-allow-term jp) nil)
-    (or (notmuch-json-scan-to-value jp)
-	(if (/= (char-after) ?\[)
-	    (signal 'json-readtable-error (list "expected '['"))
-	  (forward-char)
-	  (push ?\] (notmuch-json-term-stack jp))
-	  ;; Expect a value or terminator next
-	  (setf (notmuch-json-next jp) 'expect-value
-		(notmuch-json-allow-term jp) t)
-	  t))))
+    ;; Save "next" so we can restore it if there's a syntax error
+    (let ((saved-next (notmuch-json-next jp)))
+      (or (notmuch-json-scan-to-value jp)
+	  (if (/= (char-after) ?\[)
+	      (progn
+		(setf (notmuch-json-next jp) saved-next)
+		(signal 'json-readtable-error (list "expected '['")))
+	    (forward-char)
+	    (push ?\] (notmuch-json-term-stack jp))
+	    ;; Expect a value or terminator next
+	    (setf (notmuch-json-next jp) 'expect-value
+		  (notmuch-json-allow-term jp) t)
+	    t)))))
 
 (defun notmuch-json-read (jp)
   "Parse the value at point in JP's buffer.