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misc/emacs: allow godef to work in coverage buffers

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Jumps to the same file will use the original buffer, not the
coverage buffer. Making it work for the coverage buffer isn't
worth the trouble, especially because it would break as soon as
you jump to a different file and back.

Use error instead of message so it actually terminates

R=adonovan
CC=golang-dev
https://golang.org/cl/13041043
This commit is contained in:
Dominik Honnef 2013-08-16 00:22:38 -04:00 committed by Alan Donovan
parent c320cf85d9
commit 0b25ba9ced
1 changed files with 15 additions and 4 deletions
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19
misc/emacs/go-mode.el
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@ -948,13 +948,24 @@ visit FILENAME and go to line LINE and column COLUMN."
"Call godef, acquiring definition position and expression
description at POINT."
(if (go--xemacs-p)
(message "godef does not reliably work in XEmacs, expect bad results"))
(if (not buffer-file-name)
(message "Cannot use godef on a buffer without a file name")
(error "godef does not reliably work in XEmacs, expect bad results"))
(if (not (buffer-file-name (go--coverage-origin-buffer)))
(error "Cannot use godef on a buffer without a file name")
(let ((outbuf (get-buffer-create "*godef*")))
(with-current-buffer outbuf
(erase-buffer))
(call-process-region (point-min) (point-max) "godef" nil outbuf nil "-i" "-t" "-f" (file-truename buffer-file-name) "-o" (number-to-string (go--position-bytes (point))))
(call-process-region (point-min)
(point-max)
"godef"
nil
outbuf
nil
"-i"
"-t"
"-f"
(file-truename (buffer-file-name (go--coverage-origin-buffer)))
"-o"
(number-to-string (go--position-bytes (point))))
(with-current-buffer outbuf
(split-string (buffer-substring-no-properties (point-min) (point-max)) "\n")))))