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-rw-r--r--lib/tools/emacs/erlang.el309
1 files changed, 221 insertions, 88 deletions
diff --git a/lib/tools/emacs/erlang.el b/lib/tools/emacs/erlang.el
index 0a3fc0ddff..3d20d86f43 100644
--- a/lib/tools/emacs/erlang.el
+++ b/lib/tools/emacs/erlang.el
@@ -70,8 +70,8 @@
;; `debug-on-error' to `t'. Repeat the error and enclose the debug
;; information in your bug-report.
;;
-;; To set the variable you can use the following command:
-;; M-x set-variable RET debug-on-error RET t RET
+;; To toggle the variable you can use the following command:
+;; M-x toggle-debug-on-error RET
;;; Code:
(eval-when-compile (require 'cl))
@@ -1068,8 +1068,14 @@ behaviour.")
"Font lock keyword highlighting a function header.")
(defface erlang-font-lock-exported-function-name-face
- '((default (:inherit font-lock-function-name-face)))
- "Face used for highlighting exported functions.")
+ (if (featurep 'xemacs)
+ (progn
+ (require 'font-lock)
+ `((t (:foreground ,(face-foreground 'font-lock-function-name-face))
+ (:background ,(face-background 'font-lock-function-name-face)))))
+ '((default (:inherit font-lock-function-name-face))))
+ "Face used for highlighting exported functions."
+ :group 'erlang)
(defvar erlang-font-lock-exported-function-name-face
'erlang-font-lock-exported-function-name-face)
@@ -1338,11 +1344,15 @@ Lock syntax table. The effect is that `apply' in the atom
(defun erlang-version ()
"Return the current version of Erlang mode."
(interactive)
- (if (interactive-p)
+ (if (erlang-interactive-p)
(message "Erlang mode version %s, written by Anders Lindgren"
erlang-version))
erlang-version)
+(defun erlang-interactive-p ()
+ (if (fboundp 'called-interactively-p)
+ (called-interactively-p 'interactive)
+ (funcall (symbol-function 'interactive-p))))
;;;###autoload
(define-derived-mode erlang-mode prog-mode "Erlang"
@@ -1415,7 +1425,11 @@ Other commands:
(erlang-tags-init)
(erlang-font-lock-init)
(erlang-skel-init)
- (tempo-use-tag-list 'erlang-tempo-tags)
+ (when (fboundp 'tempo-use-tag-list)
+ (tempo-use-tag-list 'erlang-tempo-tags))
+ (when (boundp 'xref-backend-functions)
+ (add-hook 'xref-backend-functions #'erlang-etags--xref-backend nil t))
+ (run-hooks 'erlang-mode-hook)
(if (zerop (buffer-size))
(run-hooks 'erlang-new-file-hook)))
@@ -1536,7 +1550,9 @@ Other commands:
table)))
(set (make-local-variable 'font-lock-syntax-table)
erlang-font-lock-syntax-table)
- (set (make-local-variable 'font-lock-beginning-of-syntax-function)
+ (set (make-local-variable (if (boundp 'syntax-begin-function)
+ 'syntax-begin-function
+ 'font-lock-beginning-of-syntax-function))
'erlang-beginning-of-clause)
(make-local-variable 'font-lock-keywords)
(let ((level (cond ((boundp 'font-lock-maximum-decoration)
@@ -2244,6 +2260,7 @@ mode with the command `M-x erlang-mode RET'.")))
;; This code is based on the package `tempo' which is part of modern
;; Emacsen. (GNU Emacs 19.25 (?) and XEmacs 19.14.)
+(defvar erlang-skel)
(defun erlang-skel-init ()
"Generate the skeleton functions and menu items.
The variable `erlang-skel' contains the name and descriptions of
@@ -2970,8 +2987,9 @@ Return nil if inside string, t if in a comment."
(current-column)))
;; Type and Spec indentation
((eq (car stack-top) '::)
- (if (looking-at "}")
- ;; Closing record definition with types
+ (if (looking-at "[},)]")
+ ;; Closing function spec, record definition with types,
+ ;; or a comma at the start of the line
;; pop stack and recurse
(erlang-calculate-stack-indent indent-point
(cons (erlang-pop stack) (cdr state)))
@@ -3742,6 +3760,12 @@ In the future the list may contain more elements."
(if (assoc fk (cdr (car imports)))
(setq mod (car (car imports)))
(setq imports (cdr imports))))
+ (cond ((eq (preceding-char) ?#)
+ (setq fk (concat "-record(" fk)))
+ ((eq (preceding-char) ??)
+ (setq fk (concat "-define(" fk)))
+ ((and (null mod) (not (member fk erlang-int-bifs)))
+ (setq mod (erlang-get-module))))
(setq res (list mod fk)))))
(store-match-data md)
res)))
@@ -3812,20 +3836,19 @@ exported function."
(defun erlang-check-module-name-init ()
"Initialize the functionality to compare file and module names.
-Unless we have `before-save-hook', we redefine the function
+Unless we have `before-save-hook', we advice the function
`set-visited-file-name' since it clears the variable
-`local-write-file-hooks'. The original function definition is
-stored in `erlang-orig-set-visited-file-name'."
+`local-write-file-hooks'."
(if (boundp 'before-save-hook)
- ;; If we have that, `make-local-hook' is obsolete.
(add-hook 'before-save-hook 'erlang-check-module-name nil t)
(require 'advice)
- (unless (ad-advised-definition-p 'set-visited-file-name)
- (defadvice set-visited-file-name (after erlang-set-visited-file-name
- activate)
- (if (eq major-mode 'erlang-mode)
- (add-hook 'local-write-file-hooks 'erlang-check-module-name))))
- (add-hook 'local-write-file-hooks 'erlang-check-module-name)))
+ (when (fboundp 'ad-advised-definition-p)
+ (unless (ad-advised-definition-p 'set-visited-file-name)
+ (defadvice set-visited-file-name (after erlang-set-visited-file-name
+ activate)
+ (if (eq major-mode 'erlang-mode)
+ (add-hook 'local-write-file-hooks 'erlang-check-module-name))))
+ (add-hook 'local-write-file-hooks 'erlang-check-module-name))))
(defun erlang-check-module-name ()
@@ -3902,7 +3925,7 @@ non-whitespace characters following the point on the current line."
(newline)
(if (condition-case nil
(progn (erlang-indent-line) t)
- (error (if (bolp) (delete-backward-char 1))))
+ (error (if (bolp) (delete-char -1))))
(if (not (bolp))
(save-excursion
(insert " ->"))
@@ -3914,7 +3937,7 @@ non-whitespace characters following the point on the current line."
(beginning-of-line)
(newline
erlang-electric-semicolon-insert-blank-lines))))
- (error (if (bolp) (delete-backward-char 1))))))))
+ (error (if (bolp) (delete-char -1))))))))
(defun erlang-electric-comma (&optional arg)
@@ -3944,7 +3967,7 @@ non-whitespace characters following the point on the current line."
(newline)
(condition-case nil
(erlang-indent-line)
- (error (if (bolp) (delete-backward-char 1))))))
+ (error (if (bolp) (delete-char -1))))))
(defun erlang-electric-lt (&optional arg)
"Insert a less-than sign, and optionally mark it as an open paren."
@@ -4030,7 +4053,7 @@ non-whitespace characters following the point on the current line."
(newline)
(condition-case nil
(erlang-indent-line)
- (error (if (bolp) (delete-backward-char 1))))))
+ (error (if (bolp) (delete-char -1))))))
;; Then it's just a plain greater-than.
(t
@@ -4070,7 +4093,7 @@ After being split/merged into `erlang-after-arrow' and
(newline)
(condition-case nil
(erlang-indent-line)
- (error (if (bolp) (delete-backward-char 1)))))))
+ (error (if (bolp) (delete-char -1)))))))
(defun erlang-electric-newline (&optional arg)
@@ -4546,6 +4569,11 @@ Tags can be given on the forms `tag', `module:', `module:tag'."
(current-buffer))) ; Return the new buffer.
+
+
+
+
+
;; Process interactive arguments for erlang-find-tag-*.
;;
;; Negative arguments work only for `etags', not `tags'. This is not
@@ -4639,9 +4667,25 @@ Tags can be given on the forms `tag', `module:', `module:tag'."
(set (make-local-variable 'find-tag-regexp-search-function)
'erlang-tags-regexp-search-forward)
(set (make-local-variable 'find-tag-tag-order)
- '(erlang-tag-match-module-p))
+ (mapcar #'erlang-make-order-function-aware-of-modules
+ erlang-tags-orig-tag-order))
(set (make-local-variable 'find-tag-regexp-tag-order)
- '(erlang-tag-match-module-regexp-p))))
+ (mapcar #'erlang-make-order-function-aware-of-modules
+ erlang-tags-orig-regexp-tag-order))))
+
+(defun erlang-make-order-function-aware-of-modules (f)
+ `(lambda (tag)
+ (let (mod)
+ (when (string-match ":" tag)
+ (setq mod (substring tag 0 (match-beginning 0)))
+ (setq tag (substring tag (match-end 0) nil)))
+ (and (funcall ',f tag)
+ (or (null mod)
+ (erlang-tag-at-point-match-module-p mod))))))
+
+(defun erlang-tag-at-point-match-module-p (mod)
+ (string-equal mod (erlang-get-module-from-file-name
+ (funcall (symbol-function 'file-of-tag)))))
(defun erlang-tags-remove-module-check ()
@@ -4718,37 +4762,6 @@ for a tag on the form `module:tag'."
(funcall erlang-tags-orig-regexp-search-function
tag bound noerror count)))
-
-;; t if point is at a tag line that matches TAG, containing
-;; module information. Assumes that all other order functions
-;; are stored in `erlang-tags-orig-[regex]-tag-order'.
-
-(defun erlang-tag-match-module-p (tag)
- (erlang-tag-match-module-common-p tag erlang-tags-orig-tag-order))
-
-(defun erlang-tag-match-module-regexp-p (tag)
- (erlang-tag-match-module-common-p tag erlang-tags-orig-regexp-tag-order))
-
-(defun erlang-tag-match-module-common-p (tag order)
- (let ((mod nil)
- (found nil))
- (if (string-match ":" tag)
- (progn
- (setq mod (substring tag 0 (match-beginning 0)))
- (setq tag (substring tag (match-end 0) nil))))
- (while (and order (not found))
- (setq found
- (and (not (memq (car order)
- '(erlang-tag-match-module-p
- erlang-tag-match-module-regexp-p)))
- (funcall (car order) tag)))
- (setq order (cdr order)))
- (and found
- (or (null mod)
- (string= mod (erlang-get-module-from-file-name
- (file-of-tag)))))))
-
-
;;; Tags completion, Emacs 19 `etags' specific.
;;;
;;; The basic idea is to create a second completion table `erlang-tags-
@@ -4786,10 +4799,10 @@ about Erlang modules."
(cond ((and erlang-tags-installed
(fboundp 'etags-tags-completion-table)
(fboundp 'tags-lazy-completion-table)) ; Emacs 23.1+
- ;; This depends on the advice called erlang-replace-tags-table
- ;; above. It is not enough to let-bind
- ;; tags-completion-table-function since that will not override
- ;; the buffer-local value in the TAGS buffer.
+ ;; This depends on the advice called
+ ;; erlang-replace-tags-table above. It is not enough to
+ ;; let-bind tags-completion-table-function since that may be
+ ;; overwritten in etags-recognize-tags-table.
(let ((find-tag-default-function 'erlang-find-tag-for-completion))
(complete-tag)))
((and erlang-tags-installed
@@ -4911,6 +4924,132 @@ about Erlang modules."
(progress-reporter-update progress-reporter (point))))))
table))
+
+;;; Xref backend erlang-etags
+
+;; In GNU Emacs 25 xref was introduced. It is a framework for cross
+;; referencing commands, in particular commands for finding
+;; definitions. It does not replace etags. It rather resides on top
+;; of it and provides user-friendly commands. The idea is that the
+;; user commands should be the same regardless of what backend does
+;; the actual finding of definitions.
+
+;; The backend below is a wrapper around the built-in etags backend.
+;; It adds awareness of the module:tag syntax in a similar way that is
+;; done above for the old etags commands.
+
+
+(defun erlang-etags--xref-backend () 'erlang-etags)
+
+(defun erlang-soft-require (feature)
+ (when (locate-library (symbol-name feature))
+ (require feature)))
+
+(and (erlang-soft-require 'xref)
+ (erlang-soft-require 'cl-generic)
+ ;; The purpose of using eval here is to avoid compilation
+ ;; warnings in emacsen without cl-defmethod.
+ (eval
+ '(progn
+ (cl-defmethod xref-backend-identifier-at-point
+ ((_backend (eql erlang-etags)))
+ (erlang-find-tag-default))
+
+ (cl-defmethod xref-backend-definitions
+ ((_backend (eql erlang-etags)) identifier)
+ (erlang-xref-find-definitions identifier))
+
+ (cl-defmethod xref-backend-apropos
+ ((_backend (eql erlang-etags)) identifier)
+ (erlang-xref-find-definitions identifier t))
+
+ ;; PENDING - This remains to be properly implemented.
+ (cl-defmethod xref-backend-identifier-completion-table
+ ((_backend (eql erlang-etags)))
+ (tags-lazy-completion-table)))))
+
+
+(defun erlang-xref-find-definitions (identifier &optional is-regexp)
+ (let ((id-list (split-string identifier ":")))
+ (cond
+ ;; Handle "tag"
+ ((null (cdr id-list))
+ (erlang-xref-find-definitions-tag identifier is-regexp))
+ ;; Handle "module:"
+ ((string-equal (cadr id-list) "")
+ (erlang-xref-find-definitions-module (car id-list)))
+ ;; Handle "module:tag"
+ (t
+ (erlang-xref-find-definitions-module-tag (car id-list)
+ (cadr id-list)
+ is-regexp)))))
+
+(defun erlang-xref-find-definitions-tag (tag is-regexp)
+ "Find all definitions of TAG and reorder them so that
+definitions in the currently visited file comes first."
+ (when (fboundp 'etags--xref-find-definitions)
+ (let* ((current-file (and (buffer-file-name)
+ (file-truename (buffer-file-name))))
+ (xrefs (etags--xref-find-definitions tag is-regexp))
+ local-xrefs non-local-xrefs)
+ (while xrefs
+ (if (string-equal (erlang-xref-truename-file (car xrefs))
+ current-file)
+ (push (car xrefs) local-xrefs)
+ (push (car xrefs) non-local-xrefs))
+ (setq xrefs (cdr xrefs)))
+ (append (reverse local-xrefs)
+ (reverse non-local-xrefs)))))
+
+(defun erlang-xref-find-definitions-module (module)
+ (and (fboundp 'xref-make)
+ (fboundp 'xref-make-file-location)
+ (let* ((first-time t)
+ xrefs matching-files)
+ (save-excursion
+ (while (visit-tags-table-buffer (not first-time))
+ (setq first-time nil)
+ (let ((files (tags-table-files)))
+ (while files
+ (let* ((file (car files))
+ (m (erlang-get-module-from-file-name file)))
+ (when (and m (string-equal m module))
+ (unless (member file matching-files)
+ (push file
+ matching-files)
+ (push (xref-make file
+ (xref-make-file-location file 1 0))
+ xrefs))))
+ (setq files (cdr files))))))
+ (nreverse xrefs))))
+
+(defun erlang-xref-find-definitions-module-tag (module tag is-regexp)
+ "Find all definitions of TAG and filter away definitions
+outside of MODULE."
+ (when (fboundp 'etags--xref-find-definitions)
+ (let ((xrefs (etags--xref-find-definitions tag is-regexp))
+ xrefs-in-module)
+ (while xrefs
+ (when (string-equal module (erlang-xref-module (car xrefs)))
+ (push (car xrefs) xrefs-in-module))
+ (setq xrefs (cdr xrefs)))
+ xrefs-in-module)))
+
+(defun erlang-xref-module (xref)
+ (erlang-get-module-from-file-name (erlang-xref-file xref)))
+
+(defun erlang-xref-truename-file (xref)
+ (let ((file (erlang-xref-file xref)))
+ (and file
+ (file-truename file))))
+
+(defun erlang-xref-file (xref)
+ (and (fboundp 'xref-location-group)
+ (fboundp 'xref-item-location)
+ (xref-location-group (xref-item-location xref))))
+
+
+
;;;
;;; Prepare for other methods to run an Erlang slave process.
;;;
@@ -5309,8 +5448,7 @@ frame will become deselected before the next command."
()
(or (inferior-erlang-running-p)
(error "No inferior Erlang shell is running"))
- (save-excursion
- (set-buffer inferior-erlang-buffer)
+ (with-current-buffer inferior-erlang-buffer
(let ((msg nil))
(while (save-excursion
(goto-char (process-mark inferior-erlang-process))
@@ -5330,8 +5468,7 @@ frame will become deselected before the next command."
The empty command resembles hitting RET. This is useful in some
situations, for instance if a crash or error report from sasl
has been printed after the last prompt."
- (save-excursion
- (set-buffer inferior-erlang-buffer)
+ (with-current-buffer inferior-erlang-buffer
(if (> (point-max) 1)
;; make sure we get a prompt if buffer contains data
(if (save-excursion
@@ -5397,7 +5534,7 @@ Return the position after the newly inserted command."
(boundp 'comint-last-output-start))
(save-excursion
(goto-char
- (if (interactive-p)
+ (if (erlang-interactive-p)
(symbol-value 'comint-last-input-end)
(symbol-value 'comint-last-output-start)))
(while (progn (skip-chars-forward "^\C-h")
@@ -5416,7 +5553,7 @@ Return the position after the newly inserted command."
(let ((pmark (process-mark (get-buffer-process (current-buffer)))))
(save-excursion
(goto-char
- (if (interactive-p)
+ (if (erlang-interactive-p)
(symbol-value 'comint-last-input-end)
(symbol-value 'comint-last-output-start)))
(while (re-search-forward "\r+$" pmark t)
@@ -5443,23 +5580,21 @@ There exists two workarounds for this bug:
(save-some-buffers)
(inferior-erlang-prepare-for-input)
(let* ((dir (inferior-erlang-compile-outdir))
-;;; (file (file-name-nondirectory (buffer-file-name)))
(noext (substring (erlang-local-buffer-file-name) 0 -4))
(opts (append (list (cons 'outdir dir))
(if current-prefix-arg
(list 'debug_info 'export_all))
erlang-compile-extra-opts))
end)
- (save-excursion
- (set-buffer inferior-erlang-buffer)
- (compilation-forget-errors))
+ (with-current-buffer inferior-erlang-buffer
+ (when (fboundp 'compilation-forget-errors)
+ (compilation-forget-errors)))
(setq end (inferior-erlang-send-command
(inferior-erlang-compute-compile-command noext opts)
nil))
(sit-for 0)
(inferior-erlang-wait-prompt)
- (save-excursion
- (set-buffer inferior-erlang-buffer)
+ (with-current-buffer inferior-erlang-buffer
(setq compilation-error-list nil)
(set-marker compilation-parsing-end end))
(setq compilation-last-buffer inferior-erlang-buffer)))
@@ -5499,7 +5634,8 @@ unless the optional NO-DISPLAY is non-nil."
(let ((ccfn erlang-compile-command-function-alist)
(res (inferior-erlang-compute-erl-compile-command module-name opts))
ccfn-entry
- done)
+ done
+ result)
(if (not (null (erlang-local-buffer-file-name)))
(while (and (not done) (not (null ccfn)))
(setq ccfn-entry (car ccfn))
@@ -5629,12 +5765,14 @@ unless the optional NO-DISPLAY is non-nil."
(tramp-tramp-file-p (buffer-file-name))))
(defun erlang-tramp-get-localname ()
- (let ((tramp-info (tramp-dissect-file-name (buffer-file-name))))
- (if (fboundp 'tramp-file-name-localname)
- (tramp-file-name-localname tramp-info)
- ;; In old versions of tramp, it was `tramp-file-name-path'
- ;; instead of the newer `tramp-file-name-localname'
- (tramp-file-name-path tramp-info))))
+ (when (fboundp 'tramp-dissect-file-name)
+ (let ((tramp-info (tramp-dissect-file-name (buffer-file-name))))
+ (if (fboundp 'tramp-file-name-localname)
+ (tramp-file-name-localname tramp-info)
+ ;; In old versions of tramp, it was `tramp-file-name-path'
+ ;; instead of the newer `tramp-file-name-localname'
+ (when (fboundp 'tramp-file-name-path)
+ (tramp-file-name-path tramp-info))))))
;; `next-error' only accepts buffers with major mode `compilation-mode'
;; or with the minor mode `compilation-minor-mode' activated.
@@ -5651,16 +5789,14 @@ Capable of finding error messages in an inferior Erlang buffer."
(and (boundp 'compilation-last-buffer)
compilation-last-buffer))))
(if (and (bufferp buf)
- (save-excursion
- (set-buffer buf)
+ (with-current-buffer buf
(and (eq major-mode 'erlang-shell-mode)
(setq major-mode 'compilation-mode))))
(unwind-protect
(progn
(setq done t)
(next-error argp))
- (save-excursion
- (set-buffer buf)
+ (with-current-buffer buf
(setq major-mode 'erlang-shell-mode))))
(or done
(next-error argp))))
@@ -5763,7 +5899,7 @@ Simplified version of a combination `defalias' and `make-obsolete',
it assumes that NEWDEF is loaded."
(defalias sym (symbol-function newdef))
(if (fboundp 'make-obsolete)
- (make-obsolete sym newdef)))
+ (make-obsolete sym newdef "long ago")))
(erlang-obsolete 'calculate-erlang-indent 'erlang-calculate-indent)
@@ -5781,11 +5917,8 @@ it assumes that NEWDEF is loaded."
(erlang-obsolete 'name-of-erlang-function 'erlang-name-of-function)
-;; Fixme: shouldn't redefine `set-visited-file-name' anyhow -- see above.
(defconst erlang-unload-hook
(list (lambda ()
- (defalias 'set-visited-file-name
- 'erlang-orig-set-visited-file-name)
(when (featurep 'advice)
(ad-unadvise 'Man-notify-when-ready)
(ad-unadvise 'set-visited-file-name)))))