What I'm trying to accomplish
I'd like to use go-mode/lsp-mode together. I struggle to get lsp-mode to even execute at first, finally got it to work by appending the paths :facepalm:.
The issue
The issue now is that when lsp-mode starts up for the working golang directory, I receive this error:
LSP :: Error from the Language Server: no views in the session (Unknown error) [3 times]
I've searched around the internet for answers, but have yet to find anything that is relevant to my problem. I'm reaching out to the community for some guidance.
go-mode.el
(defun custom-go-mode ()
(display-line-numbers-mode 1))
(use-package go-mode
:defer t
:ensure t
:mode ("\\.go\\'" . go-mode)
:init
(setq compile-command "echo Building... && go build -v && echo Testing... && go test -v && echo Linter... && golint")
(setq compilation-read-command nil)
(add-hook 'go-mode-hook 'custom-go-mode)
:bind (("M-," . compile)
("M-." . godef-jump)))
(setq compilation-window-height 14)
(defun my-compilation-hook ()
(when (not (get-buffer-window "*compilation*"))
(save-selected-window
(save-excursion
(let* ((w (split-window-vertically))
(h (window-height w)))
(select-window w)
(switch-to-buffer "*compilation*")
(shrink-window (- h compilation-window-height)))))))
(add-hook 'compilation-mode-hook 'my-compilation-hook)
(global-set-key (kbd "C-c C-c") 'comment-or-uncomment-region)
(setq compilation-scroll-output t)
lsp-mode.el
(setq exec-path (append exec-path '("/Users/seanh/.nvm/versions/node/v12.13.0/bin/npm")))
(setq exec-path (append exec-path '("/Users/seanh/.nvm/versions/node/v12.13.0/bin/")))
(setq exec-path (append exec-path '("/usr/local/bin")))
(setq exec-path (append exec-path '("/Users/seanh/go/bin")))
(setq exec-path (append exec-path '("/Users/seanh/go/bin/gopls")))
(setq exec-path (append exec-path '("/usr/local/go/bin/go")))
(use-package lsp-mode
:ensure t
:commands (lsp lsp-deferred)
:hook (go-mode . lsp-deferred))
;;Set up before-save hooks to format buffer and add/delete imports.
;;Make sure you don't have other gofmt/goimports hooks enabled.
(defun lsp-go-install-save-hooks ()
(add-hook 'before-save-hook #'lsp-format-buffer t t)
(add-hook 'before-save-hook #'lsp-organize-imports t t))
(add-hook 'go-mode-hook #'lsp-go-install-save-hooks)
;;Optional - provides fancier overlays.
(use-package lsp-ui
:ensure t
:commands lsp-ui-mode
:init
)
;;Company mode is a standard completion package that works well with lsp-mode.
;;company-lsp integrates company mode completion with lsp-mode.
;;completion-at-point also works out of the box but doesn't support snippets.
(use-package company
:ensure t
:config
(setq company-idle-delay 0)
(setq company-minimum-prefix-length 1))
(use-package company-lsp
:ensure t
:commands company-lsp)
;;Optional - provides snippet support.
(use-package yasnippet
:ensure t
:commands yas-minor-mode
:hook (go-mode . yas-minor-mode))
;;lsp-ui-doc-enable is false because I don't like the popover that shows up on the right
;;I'll change it if I want it back
(setq lsp-ui-doc-enable nil
lsp-ui-peek-enable t
lsp-ui-sideline-enable t
lsp-ui-imenu-enable t
lsp-ui-flycheck-enable t)
I've had this happen when the go environment is not correct.
As a diagnostic try commenting out the go* exec-paths from your lsp-mode.el and set appropriate environment variables (GOROOT, GOPATH and GO111MODULE if you're using it), including adding $GOROOT/bin and $GOPATH/bin to PATH.
Also if still not working verify within emacs those environment variables are set correctly.
For linux of course you can export all that and run emacs from the terminal to test.
I'm trying to configuring Emacs on Windows and there is one package "use-package" which I wanna to insert in this on my configuration, but when I press to execute on Emacs show the message "Symbol's function definition is void: use-package"
(setq inhibit-startup-message t)
(require 'package)
(setq package-enable-at-startup nil)
(add-to-list 'package-archives '("melpa" . "https://melpa.org/packages/"))
(add-to-list 'package-archives '("gnu" . "https://elpa.gnu.org/packages/"))
(package-initialize)
(unless (package-installed-p 'use-package)
(package-refresh-contents)
(package-install 'use-package))
Sometimes I receive error message "use-package is unavailable."
Debugger entered--Lisp error: (void-function package-installed-p)
(package-installed-p (quote use-package))
(if (package-installed-p (quote use-package)) nil (package-refresh-contents) (package-install (quote use-package)))
eval((if (package-installed-p (quote use-package)) nil (package-refresh-contents) (package-install (quote use-package))) nil)
elisp--eval-last-sexp(nil)
eval-last-sexp(nil)
funcall-interactively(eval-last-sexp nil)
call-interactively(eval-last-sexp nil nil)
command-execute(eval-last-sexp)
You should be able to find use-package in the list produced with M-x package-list-packages. If that is the case, then (package-install 'use-package) should succeed: the package is available on MELPA.
To use it, you have to add
(require 'use-package)
to your .emacs (or equivalent).
I would like to load "~/todo.org" file content in scratch buffer at startup.
I have tried:
(setq initial-buffer-choice "~/todo.org")
But it opens the file in a new buffer (not scratch).
I have also tried:
(setq initial-scratch-message "~/todo.org")
But it prints the file path in the scratch buffer and i would like it's content.
I also would like to change the mode of the scratch buffer to org-mode.
I have tried:
(setq initial-major-mode org-mode)
But i have an initialisation error
Symbol's value as variable is void: org-mode
You can achieve the desired effect with a little bit of Lisp code that you put in your init file:
(condition-case err
(with-current-buffer "*scratch*"
(let ((min (point-min))
(max (point-max))
(goto-char max)
(insert-file-contents "~/todo.org")
(delete-region min max)
(org-mode)))
(error (message "%s" error-message-string err)))
But as #phils pointed out in a comment to your question, the *scratch* buffer might not be the best buffer to use for this functionality. Thus, I suggest to consider the following alternative:
(condition-case err
(let ((buffer (get-buffer-create "*todo*")))
(with-current-buffer buffer
(insert-file-contents "~/todo.org")
(org-mode))
(setq initial-buffer-choice buffer))
(error (message "%s" error-message-string err)))
By using this version, you leave the *scratch* buffer alone. Your .org file will be inserted in a separate buffer by the name of *todo*. This buffer is not associated with your ~/todo.org file, so when you first try save it, you will have to specify a file name.
Finally, i'll go for this:
(condition-case err
(when (get-buffer "*scratch*")
(with-current-buffer "*scratch*"
(erase-buffer)
(insert-file-contents "~/todo.org")
(org-mode)
)
)
(error (message "%s" error-message-string err)))
I am unable to access remote files in my usual way:
C-x C-f
[server]:[path][file]
and am thrown this error:
Wrong Type Argument: listp, [[server]:[path][file]
I'm not even sure how to debug this further.
any help is appreciated.
edit:
output when trying to debug:
Debugger entered: nil
(progn (debug) (ido-mode t) (progn (ad-add-advice (quote completing-read) (quote (foo nil
t (advice lambda nil (if (boundp ...) ad-do-it (setq ad-return-value ...))))) (quote
around) (quote nil)) (ad-activate (quote completing-read) nil) (quote completing-read)) (define-key global-map [(meta 120)] (function (lambda nil (interactive) (call-interactively
(intern (ido-completing-read "M-x " (all-completions "" obarray ...))))))))
(if (fboundp (quote ido-mode)) (progn (debug) (ido-mode t) (progn (ad-add-advice (quote
completing-read) (quote (foo nil t (advice lambda nil (if ... ad-do-it ...)))) (quote
around) (quote nil)) (ad-activate (quote completing-read) nil) (quote completing-read))
(define-key global-map [(meta 120)] (function (lambda nil (interactive) (call-
interactively (intern (ido-completing-read "M-x " ...))))))))
eval-buffer() ; Reading at buffer position 16103
call-interactively(eval-buffer)
(lambda nil (interactive) (call-interactively (intern (ido-completing-read "M-x " (all-
completions "" obarray (quote commandp))))))()
call-interactively((lambda nil (interactive) (call-interactively (intern (ido-completing-
read "M-x " (all-completions "" obarray (quote commandp)))))) nil nil)
recursive-edit()
debug(debug)
implement-debug-on-entry()
* ido-find-file()
call-interactively(ido-find-file nil nil)
And this from my init.el:
(require 'ido)
(if (fboundp 'ido-mode)
(progn
(debug)
(ido-mode t)
(defadvice completing-read
(around foo activate)
(if (boundp 'ido-cur-list)
ad-do-it
(setq ad-return-value
(ido-completing-read
prompt
(all-completions "" collection predicate)
nil require-match initial-input hist def))))
(define-key global-map [(meta ?x)]
(lambda ()
(interactive)
(call-interactively
(intern
(ido-completing-read "M-x " (all-completions "" obarray 'commandp))))))))
Check what command C-x C-f is bound to (use C-h k). Is it the standard binding find-file? (It doesn't sound like it.)
If not, check its interactive spec. The command is expecting to receive a list as argument, and it is instead receiving (what looks like) a string.
This is the interactive spec of find-file:
(interactive
(find-file-read-args "Find file: " (confirm-nonexistent-file-or-buffer)))
If the interactive spec of your C-x C-f command, like this one, has a non-string as its argument, then you can either M-x debug-on-entry THE-FUNCTION, where THE-FUNCTION is the function called for the argument (find-file-read-args, in the case of find-file), or wrap that argument so that the debugger is invoked:
(progn (debug) (WHATEVER-WAS-THERE-BEFORE))
Either way, the debugger will open for the interactive part of reading the file name, and you can walk through the debugger to see what goes wrong.
But probably you can figure out the problem just by inspecting the code -- the interactive spec. The argument to your command (whatever it is) is expected to be a list, but it is a string.
I would start by seeing what happens with a local file name. Do you get an error for that too?
Another thing I notice is that the error reports an extra [, in front of what you say you typed as input. That should provide a clue too. What you think it is reading is not what it has read.
Very often, compilations errors are displayed with the file:line syntax.
It would be nice to copy-paste this directly to open the file at the right line.
Emacs already has some mode to handle this in buffers (compile-mode, iirc), but I would like to have this available from the shell command line, since I use the standard shell most of the time outside of emacs.
Any idea how to tweak emacs to learn file:line syntax to open file at line line? (obviously, if file:line really exists on disk, it should be opened preferably)
You can do this using emacsclient. e.g. to open FILE at line 4, column 3 in a new frame:
emacsclient +4:3 FILE
Leave off the :3 to simply open the file at line 4.
I have the following in my .emacs, but I haven't found it as useful as I thought it would be.
;; Open files and goto lines like we see from g++ etc. i.e. file:line#
;; (to-do "make `find-file-line-number' work for emacsclient as well")
;; (to-do "make `find-file-line-number' check if the file exists")
(defadvice find-file (around find-file-line-number
(filename &optional wildcards)
activate)
"Turn files like file.cpp:14 into file.cpp and going to the 14-th line."
(save-match-data
(let* ((matched (string-match "^\\(.*\\):\\([0-9]+\\):?$" filename))
(line-number (and matched
(match-string 2 filename)
(string-to-number (match-string 2 filename))))
(filename (if matched (match-string 1 filename) filename)))
ad-do-it
(when line-number
;; goto-line is for interactive use
(goto-char (point-min))
(forward-line (1- line-number))))))
I suggest to add following code in your emacs config:
(defadvice server-visit-files (before parse-numbers-in-lines (files proc &optional nowait) activate)
"looks for filenames like file:line or file:line:position and reparses name in such manner that position in file"
(ad-set-arg 0
(mapcar (lambda (fn)
(let ((name (car fn)))
(if (string-match "^\\(.*?\\):\\([0-9]+\\)\\(?::\\([0-9]+\\)\\)?$" name)
(cons
(match-string 1 name)
(cons (string-to-number (match-string 2 name))
(string-to-number (or (match-string 3 name) "")))
)
fn))) files))
)
by now you can open file with a line number right from command line like this:
emacsclient filename:linenumber:position
P.S. I hope i'm not too late with my answer.
And here is my go at it. Calls the original find-file-at-point
(defun find-file-at-point-with-line()
"if file has an attached line num goto that line, ie boom.rb:12"
(interactive)
(setq line-num 0)
(save-excursion
(search-forward-regexp "[^ ]:" (point-max) t)
(if (looking-at "[0-9]+")
(setq line-num (string-to-number (buffer-substring (match-beginning 0) (match-end 0))))))
(find-file-at-point)
(if (not (equal line-num 0))
(goto-line line-num)))
You can use a bash script:
#! /bin/bash
file=$(awk '{sub(/:[0-9]*$/,"")}1' <<< "$1")
line=$(awk '{sub(/^.*:/,"")}1' <<< "$1")
emacs --no-splash "+$line" "$file" &
If you call this script for openline and you get an error message, e.g.
Error: file.cpp:1046
you can do
openline file.cpp:1046
to open the file.cpp in Emacs at line 1046..
Another version of Ivan Andrus' nice find-file advice which does both line + optional column number, as you see in node and coffeescript errors:
;; Open files and go places like we see from error messages, i e: path:line:col
;; (to-do "make `find-file-line-number' work for emacsclient as well")
;; (to-do "make `find-file-line-number' check if the file exists")
(defadvice find-file (around find-file-line-number
(path &optional wildcards)
activate)
"Turn files like file.js:14:10 into file.js and going to line 14, col 10."
(save-match-data
(let* ((match (string-match "^\\(.*?\\):\\([0-9]+\\):?\\([0-9]*\\)$" path))
(line-no (and match
(match-string 2 path)
(string-to-number (match-string 2 path))))
(col-no (and match
(match-string 3 path)
(string-to-number (match-string 3 path))))
(path (if match (match-string 1 path) path)))
ad-do-it
(when line-no
;; goto-line is for interactive use
(goto-char (point-min))
(forward-line (1- line-no))
(when (> col-no 0)
(forward-char (1- col-no)))))))
Emacs 25 does not use defadvice anymore. Refs.
So here is the version updated to the new syntax:
(defun find-file--line-number (orig-fun filename &optional wildcards)
"Turn files like file.cpp:14 into file.cpp and going to the 14-th line."
(save-match-data
(let* ((matched (string-match "^\\(.*\\):\\([0-9]+\\):?$" filename))
(line-number (and matched
(match-string 2 filename)
(string-to-number (match-string 2 filename))))
(filename (if matched (match-string 1 filename) filename)))
(apply orig-fun (list filename wildcards))
(when line-number
;; goto-line is for interactive use
(goto-char (point-min))
(forward-line (1- line-number))))))
(advice-add 'find-file :around #'find-file--line-number)
This works if you call open file from inside emacs (C-x C-f), but not works anymore from command line, it seems that emacs 25 is not using find-file when you call it from command line and I don't know how to debug this kind of thing.
You talk about pasting to open a file (I assume you mean at a find file prompt inside of emacs) and also doing something from the command line. If you want to copy & paste then you need to do something like what Ivan showed with the defadvice. If you want something from the command line you can do the following. I've adapted this from something I did a year ago with an emacs:// URI handler (for use from within Firefox):
Put this in your .emacs file:
(defun emacs-uri-handler (uri)
"Handles emacs URIs in the form: emacs:///path/to/file/LINENUM"
(save-match-data
(if (string-match "emacs://\\(.*\\)/\\([0-9]+\\)$" uri)
(let ((filename (match-string 1 uri))
(linenum (match-string 2 uri)))
(while (string-match "\\(%20\\)" filename)
(setq filename (replace-match " " nil t filename 1)))
(with-current-buffer (find-file filename)
(goto-line (string-to-number linenum))))
(beep)
(message "Unable to parse the URI <%s>" uri))))
and then create a shell script in your path (I called mine 'emacsat'):
#!/bin/bash
emacsclient --no-wait -e "(emacs-uri-handler \"emacs://$1/${2:-1}\")"
A DOS batch script would look similar, but I don't know how to do default values (though I'm pretty sure you can do it).
See How to configure firefox to run emacsclientw on certain links? for further instructions if you want to integrate with Firefox, too.
To return42's code, added column number support, and cleaned up case where column number is present, and line number is sought.
;; find file at point, jump to line no.
;; ====================================
(require 'ffap)
(defun find-file-at-point-with-line (&optional filename)
"Opens file at point and moves point to line specified next to file name."
(interactive)
(let* ((filename (or filename (if current-prefix-arg (ffap-prompter) (ffap-guesser))))
(line-number
(and (or (looking-at ".* line \\(\[0-9\]+\\)")
(looking-at "[^:]*:\\(\[0-9\]+\\)"))
(string-to-number (match-string-no-properties 1))))
(column-number
(or
(and (looking-at "[^:]*:\[0-9\]+:\\(\[0-9\]+\\)")
(string-to-number (match-string-no-properties 1)))
(let 'column-number 0))))
(message "%s --> %s:%s" filename line-number column-number)
(cond ((ffap-url-p filename)
(let (current-prefix-arg)
(funcall ffap-url-fetcher filename)))
((and line-number
(file-exists-p filename))
(progn (find-file-other-window filename)
;; goto-line is for interactive use
(goto-char (point-min))
(forward-line (1- line-number))
(forward-char column-number)))
((and ffap-pass-wildcards-to-dired
ffap-dired-wildcards
(string-match ffap-dired-wildcards filename))
(funcall ffap-directory-finder filename))
((and ffap-dired-wildcards
(string-match ffap-dired-wildcards filename)
find-file-wildcards
;; Check if it's find-file that supports wildcards arg
(memq ffap-file-finder '(find-file find-alternate-file)))
(funcall ffap-file-finder (expand-file-name filename) t))
((or (not ffap-newfile-prompt)
(file-exists-p filename)
(y-or-n-p "File does not exist, create buffer? "))
(funcall ffap-file-finder
;; expand-file-name fixes "~/~/.emacs" bug sent by CHUCKR.
(expand-file-name filename)))
;; User does not want to find a non-existent file:
((signal 'file-error (list "Opening file buffer"
"no such file or directory"
filename))))))
I made a little rewrite of the find-file-at-point function.
If there is a line number match, the file will be opened within an other window and the courser will be placed in this line. If no line number match, do what ffap normally does ...
;; find file at point, jump to line no.
;; ====================================
(require 'ffap)
(defun find-file-at-point-with-line (&optional filename)
"Opens file at point and moves point to line specified next to file name."
(interactive)
(let* ((filename (or filename (ffap-prompter)))
(line-number
(and (or (looking-at ".* line \\(\[0-9\]+\\)")
(looking-at ".*:\\(\[0-9\]+\\):"))
(string-to-number (match-string-no-properties 1)))))
(message "%s --> %s" filename line-number)
(cond ((ffap-url-p filename)
(let (current-prefix-arg)
(funcall ffap-url-fetcher filename)))
((and line-number
(file-exists-p filename))
(progn (find-file-other-window filename)
(goto-line line-number)))
((and ffap-pass-wildcards-to-dired
ffap-dired-wildcards
(string-match ffap-dired-wildcards filename))
(funcall ffap-directory-finder filename))
((and ffap-dired-wildcards
(string-match ffap-dired-wildcards filename)
find-file-wildcards
;; Check if it's find-file that supports wildcards arg
(memq ffap-file-finder '(find-file find-alternate-file)))
(funcall ffap-file-finder (expand-file-name filename) t))
((or (not ffap-newfile-prompt)
(file-exists-p filename)
(y-or-n-p "File does not exist, create buffer? "))
(funcall ffap-file-finder
;; expand-file-name fixes "~/~/.emacs" bug sent by CHUCKR.
(expand-file-name filename)))
;; User does not want to find a non-existent file:
((signal 'file-error (list "Opening file buffer"
"no such file or directory"
filename))))))
If you have an old version of the ffap (2008) you should update your emacs or apply
an other small patch ...
--- Emacs/lisp/ffap.el
+++ Emacs/lisp/ffap.el
## -1170,7 +1170,7 ## which may actually result in an url rather than a filename."
;; remote, you probably already have a connection.
((and (not abs) (ffap-file-exists-string name)))
;; Try stripping off line numbers; good for compilation/grep output.
- ((and (not abs) (string-match ":[0-9]" name)
+ ((and (string-match ":[0-9]" name)
(ffap-file-exists-string (substring name 0 (match-beginning 0)))))
;; Try stripping off prominent (non-root - #) shell prompts
Here is a zsh function that works if you put it into your .zshrc file.
Since I'm running my code in zsh usually, and this is where i see the errors. Kudos to #sanityinc for the emacs part. Just thought this should be on google.
emn () {
blah=$1
filen=(${(s.:.)blah})
/Applications/Emacs.app/Contents/MacOS/Emacs +$filen[2] $filen[1] &
}
Use like emn /long/stack/error.rb:123
I've modified ivan-andrus defadvice so it works with emacsclient:
(defadvice find-file-noselect (around find-file-noselect-at-line
(filename &optional nowarn rawfile wildcards)
activate)
"Turn files like file.cpp:14 into file.cpp and going to the 14-th line."
(save-match-data
(let* ((matched (string-match "^\\(.*\\):\\([0-9]+\\):?$" filename))
(line-number (and matched
(match-string 2 filename)
(string-to-number (match-string 2 filename))))
(filename (if matched (match-string 1 filename) filename))
(buffer-name ad-do-it))
(when line-number
(with-current-buffer buffer-name
(goto-char (point-min))
(forward-line (1- line-number)))))))
I use this a lot, I made it with command-line-1:
;;;; Open files and goto lines like we see from g++ etc. i.e. file:line#
(defun command-line-1--line-number (orig-fun args)
(setq new-args ())
(dolist (f args)
(setq new-args
(append new-args
(if (string-match "^\\(.*\\):\\([0-9]+\\):?$" f)
(list (concat "+" (match-string 2 f))
(match-string 1 f))
(list f)))))
(apply orig-fun (list new-args)))
(advice-add 'command-line-1 :around #'command-line-1--line-number)