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https://golang.org/cl/170920043
93 lines
3.6 KiB
EmacsLisp
93 lines
3.6 KiB
EmacsLisp
;;; Copyright 2014 The Go Authors. All rights reserved.
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;;; Use of this source code is governed by a BSD-style
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;;; license that can be found in the LICENSE file.
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;;;
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;;; Integration of the 'gorename' tool into Emacs.
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;;;
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;;; To install:
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;;; % go get golang.org/x/tools/cmd/gorename
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;;; % go build golang.org/x/tools/cmd/gorename
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;;; % mv gorename $HOME/bin/ # or elsewhere on $PATH
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;;;
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;;; The go-rename-command variable can be customized to specify an
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;;; alternative location for the installed command.
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(require 'compile)
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(require 'go-mode)
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(require 'thingatpt)
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(defgroup go-rename nil
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"Options specific to the Go rename."
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:group 'go)
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(defcustom go-rename-command "gorename"
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"The `gorename' command; by the default, $PATH is searched."
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:type 'string
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:group 'go-rename)
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(defun go-rename (new-name)
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"Rename the entity denoted by the identifier at point, using
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the `gorename' tool."
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(interactive (list (read-string "New name: " (thing-at-point 'symbol))))
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(if (not buffer-file-name)
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(error "Cannot use go-rename on a buffer without a file name"))
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;; It's not sufficient to save the current buffer if modified,
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;; since if gofmt-before-save is on the before-save-hook,
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;; saving will disturb the selected region.
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(if (buffer-modified-p)
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(error "Please save the current buffer before invoking go-rename"))
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;; Prompt-save all other modified Go buffers, since they might get written.
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(save-some-buffers nil #'(lambda ()
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(and (buffer-file-name)
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(string= (file-name-extension (buffer-file-name)) ".go"))))
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(let* ((posflag (format "-offset=%s:#%d"
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buffer-file-name
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(1- (go--position-bytes (point)))))
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(env-vars (go-root-and-paths))
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(goroot-env (concat "GOROOT=" (car env-vars)))
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(gopath-env (concat "GOPATH=" (mapconcat #'identity (cdr env-vars) ":")))
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success)
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(with-current-buffer (get-buffer-create "*go-rename*")
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(setq buffer-read-only nil)
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(erase-buffer)
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(let ((args (list go-rename-command nil t nil posflag "-to" new-name)))
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;; Log the command to *Messages*, for debugging.
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(message "Command: %s:" args)
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(message "Running gorename...")
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;; Use dynamic binding to modify/restore the environment
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(setq success (zerop (let ((process-environment (list* goroot-env gopath-env process-environment)))
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(apply #'call-process args))))
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(insert "\n")
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(compilation-mode)
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(setq compilation-error-screen-columns nil)
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;; On success, print the one-line result in the message bar,
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;; and hide the *go-rename* buffer.
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(let ((w (display-buffer (current-buffer))))
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(if success
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(progn
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(message "%s" (go--buffer-string-no-trailing-space))
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(delete-window w))
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;; failure
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(message "gorename exited")
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(shrink-window-if-larger-than-buffer w)
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(set-window-point w (point-min)))))))
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;; Reload the modified files, saving line/col.
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;; (Don't restore the point since the text has changed.)
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;;
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;; TODO(adonovan): should we also do this for all other files
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;; that were updated (the tool can print them)?
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(let ((line (line-number-at-pos))
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(col (current-column)))
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(revert-buffer t t t) ; safe, because we just saved it
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(goto-char (point-min))
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(forward-line (1- line))
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(forward-char col)))
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(defun go--buffer-string-no-trailing-space ()
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(replace-regexp-in-string "[\t\n ]*\\'"
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""
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(buffer-substring (point-min) (point-max))))
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