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tvl-depot/configs/shared/emacs/.emacs.d/elpa/haskell-mode-20180913.348/haskell-load.el
William Carroll 9da3ffee41 Update Emacs packages 
This is a massive diff that I had to do in a hurry - when leaving
Urbint. I'm pretty sure that most of these are updating Emacs packages,
but I'm not positive.
2018-10-02 09:54:39 -04:00

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;;; haskell-load.el --- Compiling and loading modules in the GHCi process -*- lexical-binding: t -*-
;; Copyright © 2014 Chris Done. All rights reserved.
;; 2016 Arthur Fayzrakhmanov
;; This file is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation; either version 3, or (at your option)
;; any later version.
;; This file is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with this program. If not, see <http://www.gnu.org/licenses/>.
;;; Commentary:
;;; Code:
(require 'cl-lib)
(require 'haskell-mode)
(require 'haskell-process)
(require 'haskell-interactive-mode)
(require 'haskell-modules)
(require 'haskell-commands)
(require 'haskell-session)
(require 'haskell-string)
(defun haskell-process-look-config-changes (session)
"Check whether a cabal configuration file has changed.
Restarts the SESSION's process if that is the case."
(let ((current-checksum (haskell-session-get session 'cabal-checksum))
(new-checksum (haskell-cabal-compute-checksum
(haskell-session-get session 'cabal-dir))))
(when (not (string= current-checksum new-checksum))
(haskell-interactive-mode-echo
session
(format "Cabal file changed: %s" new-checksum))
(haskell-session-set-cabal-checksum
session
(haskell-session-get session 'cabal-dir))
(haskell-mode-toggle-interactive-prompt-state)
(unwind-protect
(unless
(and haskell-process-prompt-restart-on-cabal-change
(not
(y-or-n-p "Cabal file changed. Restart GHCi process? ")))
(haskell-process-start (haskell-interactive-session)))
(haskell-mode-toggle-interactive-prompt-state t)))))
(defun haskell-process-live-build (process buffer echo-in-repl)
"Show live updates for loading files."
(cond
((haskell-process-consume
process
(concat "\\[[ ]*\\([0-9]+\\) of \\([0-9]+\\)\\]"
" Compiling \\([^ ]+\\)[ ]+"
"( \\([^ ]+\\), \\([^ ]+\\) )[^\r\n]*[\r\n]+"))
(haskell-process-echo-load-message process buffer echo-in-repl nil)
t)
((haskell-process-consume
process
(concat "\\[[ ]*\\([0-9]+\\) of \\([0-9]+\\)\\]"
" Compiling \\[TH\\] \\([^ ]+\\)[ ]+"
"( \\([^ ]+\\), \\([^ ]+\\) )[^\r\n]*[\r\n]+"))
(haskell-process-echo-load-message process buffer echo-in-repl t)
t)
((haskell-process-consume
process
"Loading package \\([^ ]+\\) ... linking ... done.\n")
(haskell-mode-message-line
(format "Loading: %s"
(match-string 1 buffer)))
t)
((haskell-process-consume
process
"^Preprocessing executables for \\(.+?\\)\\.\\.\\.")
(let ((msg (format "Preprocessing: %s" (match-string 1 buffer))))
(haskell-interactive-mode-echo (haskell-process-session process) msg)
(haskell-mode-message-line msg)))
((haskell-process-consume process "Linking \\(.+?\\) \\.\\.\\.")
(let ((msg (format "Linking: %s" (match-string 1 buffer))))
(haskell-interactive-mode-echo (haskell-process-session process) msg)
(haskell-mode-message-line msg)))
((haskell-process-consume process "\nBuilding \\(.+?\\)\\.\\.\\.")
(let ((msg (format "Building: %s" (match-string 1 buffer))))
(haskell-interactive-mode-echo (haskell-process-session process) msg)
(haskell-mode-message-line msg)))
((string-match "Collecting type info for [[:digit:]]+ module(s) \\.\\.\\."
(haskell-process-response process)
(haskell-process-response-cursor process))
(haskell-mode-message-line (match-string 0 buffer))
;; Do not consume "Ok, modules loaded" that goes before
;; "Collecting type info...", just exit.
nil)))
(defun haskell-process-load-complete (session process buffer reload module-buffer &optional cont)
"Handle the complete loading response. BUFFER is the string of
text being sent over the process pipe. MODULE-BUFFER is the
actual Emacs buffer of the module being loaded."
(when (get-buffer (format "*%s:splices*" (haskell-session-name session)))
(with-current-buffer (haskell-interactive-mode-splices-buffer session)
(erase-buffer)))
(let* ((ok (cond
((haskell-process-consume
process
"Ok, \\(?:[0-9]+\\) modules? loaded\\.$")
t)
((haskell-process-consume
process
"Ok, \\(?:[a-z]+\\) module loaded\\.$") ;; for ghc 8.4
t)
((haskell-process-consume
process
"Failed, \\(?:[0-9]+\\) modules? loaded\\.$")
nil)
((haskell-process-consume
process
"Ok, modules loaded: \\(.+\\)\\.$")
t)
((haskell-process-consume
process
"Failed, modules loaded: \\(.+\\)\\.$")
nil)
(t
(error (message "Unexpected response from haskell process.")))))
(modules (haskell-process-extract-modules buffer))
(cursor (haskell-process-response-cursor process))
(warning-count 0))
(haskell-process-set-response-cursor process 0)
(haskell-check-remove-overlays module-buffer)
(while
(haskell-process-errors-warnings module-buffer session process buffer)
(setq warning-count (1+ warning-count)))
(haskell-process-set-response-cursor process cursor)
(if (and (not reload)
haskell-process-reload-with-fbytecode)
(haskell-process-reload-with-fbytecode process module-buffer)
(haskell-process-import-modules process (car modules)))
(if ok
(haskell-mode-message-line (if reload "Reloaded OK." "OK."))
(haskell-interactive-mode-compile-error session "Compilation failed."))
(when cont
(condition-case-unless-debug e
(funcall cont ok)
(error (message "%S" e))
(quit nil)))))
(defun haskell-process-suggest-imports (session file modules ident)
"Suggest add missed imports to file.
Asks user to add to SESSION's FILE missed import. MODULES is a
list of modules where missed IDENT was found."
(cl-assert session)
(cl-assert file)
(cl-assert ident)
(haskell-mode-toggle-interactive-prompt-state)
(unwind-protect
(let* ((process (haskell-session-process session))
(suggested-already (haskell-process-suggested-imports process))
(module
(cond
((> (length modules) 1)
(when (y-or-n-p
(format
"Identifier `%s' not in scope, choose module to import?"
ident))
(haskell-complete-module-read "Module: " modules)))
((= (length modules) 1)
(let ((module (car modules)))
(unless (member module suggested-already)
(haskell-process-set-suggested-imports
process
(cons module suggested-already))
(when (y-or-n-p
(format "Identifier `%s' not in scope, import `%s'?"
ident
module))
module)))))))
(when module
(haskell-process-find-file session file)
(haskell-add-import module)))
(haskell-mode-toggle-interactive-prompt-state t)))
(defun haskell-process-trigger-suggestions (session msg file line)
"Trigger prompting to add any extension suggestions."
(cond ((let ((case-fold-search nil))
(or
(and (string-match " -X\\([A-Z][A-Za-z]+\\)" msg)
(not (string-match "\\([A-Z][A-Za-z]+\\) is deprecated" msg)))
(string-match "Use \\([A-Z][A-Za-z]+\\) to permit this" msg)
(string-match "Use \\([A-Z][A-Za-z]+\\) to allow" msg)
(string-match "Use \\([A-Z][A-Za-z]+\\) to enable" msg)
(string-match
"Use \\([A-Z][A-Za-z]+\\) if you want to disable this"
msg)
(string-match "use \\([A-Z][A-Za-z]+\\)" msg)
(string-match "You need \\([A-Z][A-Za-z]+\\)" msg)))
(when haskell-process-suggest-language-pragmas
(haskell-process-suggest-pragma
session
"LANGUAGE"
(match-string 1 msg)
file)))
((string-match
" The \\(qualified \\)?import of[ ][‘`‛]\\([^ ]+\\)['’] is redundant"
msg)
(when haskell-process-suggest-remove-import-lines
(haskell-process-suggest-remove-import
session
file
(match-string 2 msg)
line)))
((string-match "[Ww]arning: orphan instance: " msg)
(when haskell-process-suggest-no-warn-orphans
(haskell-process-suggest-pragma
session
"OPTIONS" "-fno-warn-orphans"
file)))
((or (string-match "against inferred type [‘`‛]\\[Char\\]['’]" msg)
(string-match "with actual type [‘`‛]\\[Char\\]['’]" msg))
(when haskell-process-suggest-overloaded-strings
(haskell-process-suggest-pragma
session
"LANGUAGE" "OverloadedStrings"
file)))
((string-match "^Not in scope: .*[‘`‛]\\(.+\\)['’]$" msg)
(let* ((match1 (match-string 1 msg))
(ident (if (string-match "^[A-Za-z0-9_'.]+\\.\\(.+\\)$" match1)
;; Skip qualification.
(match-string 1 match1)
match1)))
(when haskell-process-suggest-hoogle-imports
(let ((modules (haskell-process-hoogle-ident ident)))
(haskell-process-suggest-imports session file modules ident)))
(when haskell-process-suggest-haskell-docs-imports
(let ((modules (haskell-process-haskell-docs-ident ident)))
(haskell-process-suggest-imports session file modules ident)))
(when haskell-process-suggest-hayoo-imports
(let ((modules (haskell-process-hayoo-ident ident)))
(haskell-process-suggest-imports session file modules ident)))))
((string-match "^[ ]+It is a member of the hidden package [‘`‛]\\([^@\r\n]+\\).*['’].$" msg)
(when haskell-process-suggest-add-package
(haskell-process-suggest-add-package session msg)))))
(defun haskell-process-do-cabal (command)
"Run a Cabal command."
(let ((process (ignore-errors
(haskell-interactive-process))))
(cond
((or (eq process nil)
(let ((child (haskell-process-process process)))
(not (equal 'run (process-status child)))))
(message "Process is not running, so running directly.")
(shell-command (concat "cabal " command)
(get-buffer-create "*haskell-process-log*")
(get-buffer-create "*haskell-process-log*"))
(switch-to-buffer-other-window (get-buffer "*haskell-process-log*")))
(t (haskell-process-queue-command
process
(make-haskell-command
:state (list (haskell-interactive-session) process command 0)
:go
(lambda (state)
(haskell-process-send-string
(cadr state)
(format haskell-process-do-cabal-format-string
(haskell-session-cabal-dir (car state))
(format "%s %s"
(cl-ecase (haskell-process-type)
('ghci haskell-process-path-cabal)
('cabal-repl haskell-process-path-cabal)
('cabal-new-repl haskell-process-path-cabal)
('cabal-ghci haskell-process-path-cabal)
('stack-ghci haskell-process-path-stack))
(cl-caddr state)))))
:live
(lambda (state buffer)
(let ((cmd (replace-regexp-in-string "^\\([a-z]+\\).*"
"\\1"
(cl-caddr state))))
(cond ((or (string= cmd "build")
(string= cmd "install"))
(haskell-process-live-build (cadr state) buffer t))
(t
(haskell-process-cabal-live state buffer)))))
:complete
(lambda (state response)
(let* ((process (cadr state))
(session (haskell-process-session process))
(message-count 0)
(cursor (haskell-process-response-cursor process)))
;; XXX: what the hell about the rampant code duplication?
(haskell-process-set-response-cursor process 0)
(while (haskell-process-errors-warnings nil session process response)
(setq message-count (1+ message-count)))
(haskell-process-set-response-cursor process cursor)
(let ((msg (format "Complete: cabal %s (%s compiler messages)"
(cl-caddr state)
message-count)))
(haskell-interactive-mode-echo session msg)
(when (= message-count 0)
(haskell-interactive-mode-echo
session
"No compiler messages, dumping complete output:")
(haskell-interactive-mode-echo session response))
(haskell-mode-message-line msg)
(when (and haskell-notify-p
(fboundp 'notifications-notify))
(notifications-notify
:title (format "*%s*" (haskell-session-name (car state)))
:body msg
:app-name (cl-ecase (haskell-process-type)
('ghci haskell-process-path-cabal)
('cabal-repl haskell-process-path-cabal)
('cabal-new-repl haskell-process-path-cabal)
('cabal-ghci haskell-process-path-cabal)
('stack-ghci haskell-process-path-stack))
:app-icon haskell-process-logo)))))))))))
(defun haskell-process-echo-load-message (process buffer echo-in-repl th)
"Echo a load message."
(let ((session (haskell-process-session process))
(module-name (match-string 3 buffer))
(file-name (match-string 4 buffer)))
(haskell-interactive-show-load-message
session
'compiling
module-name
(haskell-session-strip-dir session file-name)
echo-in-repl
th)))
(defun haskell-process-extract-modules (buffer)
"Extract the modules from the process buffer."
(let* ((modules-string (match-string 1 buffer))
(modules (and modules-string (split-string modules-string ", "))))
(cons modules modules-string)))
;;;###autoload
(defface haskell-error-face
'((((supports :underline (:style wave)))
:underline (:style wave :color "#dc322f"))
(t
:inherit error))
"Face used for marking error lines."
:group 'haskell-mode)
;;;###autoload
(defface haskell-warning-face
'((((supports :underline (:style wave)))
:underline (:style wave :color "#b58900"))
(t
:inherit warning))
"Face used for marking warning lines."
:group 'haskell-mode)
;;;###autoload
(defface haskell-hole-face
'((((supports :underline (:style wave)))
:underline (:style wave :color "#6c71c4"))
(t
:inherit warning))
"Face used for marking hole lines."
:group 'haskell-mode)
(defvar haskell-check-error-fringe (propertize "!" 'display '(left-fringe exclamation-mark)))
(defvar haskell-check-warning-fringe (propertize "?" 'display '(left-fringe question-mark)))
(defvar haskell-check-hole-fringe (propertize "_" 'display '(left-fringe horizontal-bar)))
(defun haskell-check-overlay-p (ovl)
(overlay-get ovl 'haskell-check))
(defun haskell-check-filter-overlays (xs)
(cl-remove-if-not 'haskell-check-overlay-p xs))
(defun haskell-check-remove-overlays (buffer)
(with-current-buffer buffer
(remove-overlays (point-min) (point-max) 'haskell-check t)))
(defmacro haskell-with-overlay-properties (proplist ovl &rest body)
"Evaluate BODY with names in PROPLIST bound to the values of
correspondingly-named overlay properties of OVL."
(let ((ovlvar (cl-gensym "OVL-")))
`(let* ((,ovlvar ,ovl)
,@(mapcar (lambda (p) `(,p (overlay-get ,ovlvar ',p))) proplist))
,@body)))
(defun haskell-overlay-start> (o1 o2)
(> (overlay-start o1) (overlay-start o2)))
(defun haskell-overlay-start< (o1 o2)
(< (overlay-start o1) (overlay-start o2)))
(defun haskell-first-overlay-in-if (test beg end)
(let ((ovls (cl-remove-if-not test (overlays-in beg end))))
(cl-first (sort (cl-copy-list ovls) 'haskell-overlay-start<))))
(defun haskell-last-overlay-in-if (test beg end)
(let ((ovls (cl-remove-if-not test (overlays-in beg end))))
(cl-first (sort (cl-copy-list ovls) 'haskell-overlay-start>))))
(defun haskell-error-overlay-briefly (ovl)
(haskell-with-overlay-properties
(haskell-msg haskell-msg-type) ovl
(cond
((not (eq haskell-msg-type 'warning))
haskell-msg)
((string-prefix-p "[Ww]arning:\n " haskell-msg)
(cl-subseq haskell-msg 13))
(t
(error
"Invariant failed: a warning message from GHC has unexpected form: %s."
haskell-msg)))))
(defun haskell-goto-error-overlay (ovl)
(cond (ovl
(goto-char (overlay-start ovl))
(haskell-mode-message-line (haskell-error-overlay-briefly ovl)))
(t
(message "No further notes from Haskell compiler."))))
(defun haskell-goto-first-error ()
(interactive)
(haskell-goto-error-overlay
(haskell-first-overlay-in-if 'haskell-check-overlay-p
(buffer-end 0) (buffer-end 1))))
(defun haskell-goto-prev-error ()
(interactive)
(haskell-goto-error-overlay
(let ((ovl-at
(cl-first (haskell-check-filter-overlays (overlays-at (point))))))
(or (haskell-last-overlay-in-if 'haskell-check-overlay-p
(point-min)
(if ovl-at (overlay-start ovl-at) (point)))
ovl-at))))
(defun haskell-goto-next-error ()
(interactive)
(haskell-goto-error-overlay
(let ((ovl-at
(cl-first (haskell-check-filter-overlays (overlays-at (point))))))
(or (haskell-first-overlay-in-if
'haskell-check-overlay-p
(if ovl-at (overlay-end ovl-at) (point)) (point-max))
ovl-at))))
(defun haskell-check-paint-overlay
(buffer error-from-this-file-p line msg file type hole coln)
(with-current-buffer buffer
(let (beg end)
(goto-char (point-min))
;; XXX: we can avoid excess buffer walking by relying on the maybe-fact
;; that GHC sorts error messages by line number, maybe.
(cond
(error-from-this-file-p
(forward-line (1- line))
(forward-char (1- coln))
(setq beg (point))
(if (eq type 'hole)
(forward-char (length hole))
(skip-chars-forward "^[:space:]" (line-end-position)))
(setq end (point)))
(t
(setq beg (point))
(forward-line)
(setq end (point))))
(let ((ovl (make-overlay beg end)))
(overlay-put ovl 'haskell-check t)
(overlay-put ovl 'haskell-file file)
(overlay-put ovl 'haskell-msg msg)
(overlay-put ovl 'haskell-msg-type type)
(overlay-put ovl 'help-echo msg)
(overlay-put ovl 'haskell-hole hole)
(cl-destructuring-bind
(face fringe)
(cl-case type
(warning
(list 'haskell-warning-face haskell-check-warning-fringe))
(hole
(list 'haskell-hole-face haskell-check-hole-fringe))
(error
(list 'haskell-error-face haskell-check-error-fringe)))
(overlay-put ovl 'before-string fringe)
(overlay-put ovl 'face face))))))
(defun haskell-process-errors-warnings
(module-buffer session process buffer &optional return-only)
"Trigger handling type errors or warnings.
Either prints the messages in the interactive buffer or if CONT
is specified, passes the error onto that.
When MODULE-BUFFER is non-NIL, paint error overlays."
(save-excursion
(cond
((haskell-process-consume
process
"\\(Module imports form a cycle:[ \n]+module [^ ]+ ([^)]+)[[:unibyte:][:nonascii:]]+?\\)\nFailed")
(let ((err (match-string 1 buffer)))
(if (string-match "module [`'‘‛]\\([^ ]+\\)['’`] (\\([^)]+\\))" err)
(let* ((default-directory (haskell-session-current-dir session))
(module (match-string 1 err))
(file (match-string 2 err))
(relative-file-name (file-relative-name file)))
(unless return-only
(haskell-interactive-show-load-message
session
'import-cycle
module
relative-file-name
nil
nil)
(haskell-interactive-mode-compile-error
session
(format "%s:1:0: %s"
relative-file-name
err)))
(list :file file :line 1 :col 0 :msg err :type 'error))
t)))
((haskell-process-consume
process
(concat "[\r\n]\\([A-Z]?:?[^ \r\n:][^:\n\r]+\\):\\([0-9()-:]+\\):"
"[ \n\r]+\\([[:unibyte:][:nonascii:]]+?\\)\n[^ ]"))
(haskell-process-set-response-cursor
process
(- (haskell-process-response-cursor process) 1))
(let* ((buffer (haskell-process-response process))
(file (match-string 1 buffer))
(location-raw (match-string 2 buffer))
(error-msg (match-string 3 buffer))
(type (cond ((string-match "^[Ww]arning:" error-msg) 'warning)
((string-match "^Splicing " error-msg) 'splice)
(t 'error)))
(critical (not (eq type 'warning)))
;; XXX: extract hole information, pass down to
;; `haskell-check-paint-overlay'
(final-msg (format "%s:%s: %s"
(haskell-session-strip-dir session file)
location-raw
error-msg))
(location (haskell-process-parse-error
(concat file ":" location-raw ": x")))
(line (plist-get location :line))
(col1 (plist-get location :col)))
(when (and module-buffer haskell-process-show-overlays)
(haskell-check-paint-overlay
module-buffer
(string= (file-truename (buffer-file-name module-buffer))
(file-truename file))
line error-msg file type nil col1))
(if return-only
(list :file file :line line :col col1 :msg error-msg :type type)
(progn (funcall (cl-case type
(warning 'haskell-interactive-mode-compile-warning)
(splice 'haskell-interactive-mode-compile-splice)
(error 'haskell-interactive-mode-compile-error))
session final-msg)
(when critical
(haskell-mode-message-line final-msg))
(haskell-process-trigger-suggestions
session
error-msg
file
line)
t)))))))
(defun haskell-interactive-show-load-message (session type module-name file-name echo th)
"Show the '(Compiling|Loading) X' message."
(let ((msg (concat
(cl-ecase type
('compiling
(if haskell-interactive-mode-include-file-name
(format "Compiling: %s (%s)" module-name file-name)
(format "Compiling: %s" module-name)))
('loading (format "Loading: %s" module-name))
('import-cycle
(format "Module has an import cycle: %s" module-name)))
(if th " [TH]" ""))))
(haskell-mode-message-line msg)
(when haskell-interactive-mode-delete-superseded-errors
(haskell-interactive-mode-delete-compile-messages session file-name))
(when echo
(haskell-interactive-mode-echo session msg))))
;;;###autoload
(defun haskell-process-reload-devel-main ()
"Reload the module `DevelMain' and then run `DevelMain.update'.
This is for doing live update of the code of servers or GUI
applications. Put your development version of the program in
`DevelMain', and define `update' to auto-start the program on a
new thread, and use the `foreign-store' package to access the
running context across :load/:reloads in GHCi."
(interactive)
(haskell-mode-toggle-interactive-prompt-state)
(unwind-protect
(with-current-buffer
(or (get-buffer "DevelMain.hs")
(if (y-or-n-p
"You need to open a buffer named DevelMain.hs. Find now?")
(ido-find-file)
(error "No DevelMain.hs buffer.")))
(let ((session (haskell-interactive-session)))
(let ((process (haskell-interactive-process)))
(haskell-process-queue-command
process
(make-haskell-command
:state (list :session session
:process process
:buffer (current-buffer))
:go (lambda (state)
(haskell-process-send-string (plist-get state ':process)
":l DevelMain"))
:live (lambda (state buffer)
(haskell-process-live-build (plist-get state ':process)
buffer
nil))
:complete (lambda (state response)
(haskell-process-load-complete
(plist-get state ':session)
(plist-get state ':process)
response
nil
(plist-get state ':buffer)
(lambda (ok)
(when ok
(haskell-process-queue-without-filters
(haskell-interactive-process)
"DevelMain.update")
(message "DevelMain updated."))))))))))
(haskell-mode-toggle-interactive-prompt-state t)))
(provide 'haskell-load)
;;; haskell-load.el ends here
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