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bug#25083: 26.0.50; poor interaction between flymake and desktop-save-mo


From: Sam Steingold
Subject: bug#25083: 26.0.50; poor interaction between flymake and desktop-save-mode
Date: Thu, 01 Dec 2016 14:13:20 -0500

When I start Emacs after editing a bunch of Python files,
desktop-save-mode restores them and flymake starts syntax checking
processes in each of them.

However, there is a snag: python virtual environments.
Basically, each python projects uses a separate virtual environments
which includes its own python packages, and, moreover, its own python
and pylint executables(!)

This means that flymake fails to find the epylint executable and
displays a GUI popup(!) for each(!) python file that I edited in the
previous session.  Note that this failure should _not_ be fatal (see PS
below).

You can imagine, I am sure, how frustrating it is to have to click on
"OK" (or even hit "esc") 30 times before Emacs actually starts.
The workaround is to customize `flymake-gui-warnings-enabled' to nil,
but this is only one part of the problem.

The necessary fixes would entail:

* flymake should only display GUI warnings in response to a manual
  action, not when desktop-save-mode restores a buffer.

* the initial failure in desktop-save-mode should "defer" flymake rather
  than "disable" it permanently.


PS. Fixing the following will probably require pyvenv-specific work and
is outside the core Emacs issues, but maybe you have suggestions:

This initial failure, apparently, makes flymake _disable_ itself in all
restored buffers, so I have to re-enable it manually (if & when I notice
that it is not running there).

When I select the Python virtual environment using the pyvenv-workon
command (I might also disable virtual environment altogether or switch
between them &c), the location of the epylint executable should change.



In GNU Emacs 26.0.50.2 (x86_64-apple-darwin16.1.0, NS appkit-1504.60 Version 
10.12.1 (Build 16B2555))
 of 2016-12-01 built on clr-sds
Repository revision: bb8e38273e701ad5c65e747e8eda3bd8f3aa4adb
Windowing system distributor 'Apple', version 10.3.1504
Recent messages:
Running hg log -r . -l1 --template {i... ....OK = 0
Compiling /Users/sds/.emacs.el...done
Wrote /Users/sds/.emacs.elc
Mark set
Quit
Mark saved where search started
nil [2 times]
t
nil
Scanning for dabbrevs...done

Configured using:
 'configure --with-ns
 
PKG_CONFIG_PATH=/usr/local/opt/libxml2/lib/pkgconfig:/usr/local/opt/imagemagick/lib/pkgconfig/'

Configured features:
IMAGEMAGICK NOTIFY ACL GNUTLS LIBXML2 ZLIB TOOLKIT_SCROLL_BARS NS

Important settings:
  value of $LANG: C
  locale-coding-system: utf-8-unix

Major mode: Emacs-Lisp

Minor modes in effect:
  pyvenv-mode: t
  diff-auto-refine-mode: t
  rcirc-track-minor-mode: t
  which-function-mode: t
  url-handler-mode: t
  show-paren-mode: t
  desktop-save-mode: t
  shell-dirtrack-mode: t
  tooltip-mode: t
  global-eldoc-mode: t
  electric-indent-mode: t
  mouse-wheel-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  column-number-mode: t
  line-number-mode: t
  abbrev-mode: t

Load-path shadows:
/Users/sds/.emacs.d/elpa/scala-mode-20160902.525/ob-scala hides 
/Users/sds/src/emacs/trunk/lisp/org/ob-scala

Features:
(shadow sort bbdb-message mailalias cookie1 mail-extr gnus-msg gnus-art
mm-uu mml2015 mm-view mml-smime smime dig mailcap gnus-sum gnus-group
gnus-undo gnus-start gnus-cloud nnimap nnmail mail-source tls gnutls
utf7 netrc nnoo parse-time gnus-spec gnus-int gnus-range gnus-win
dabbrev emacsbug sendmail skeleton cl-indent misearch multi-isearch
find-func apropos log-edit message puny rfc822 mml mml-sec epa epg
epg-config mm-decode mm-bodies mm-encode mail-parse rfc2231 gmm-utils
mailheader pcvs-util time-stamp smerge-mode pp vc-bzr vc-src vc-sccs
vc-svn vc-cvs vc-rcs add-log view dired-aux dired dired-loaddefs
company-oddmuse company-keywords company-etags company-gtags
company-dabbrev-code company-dabbrev company-files company-cmake
company-xcode company-clang company-eclim company-template company-css
company-nxml company-bbdb yasnippet flymake company help-fns radix-tree
elpy find-file-in-project ivy delsel ivy-overlay ffap pyvenv
elpy-refactor derived edmacro kmacro grep files-x etags xref project
cus-edit python tramp-sh json vc-dir ewoc vc vc-git diff-mode map
vc-dispatcher vc-hg flyspell ispell finder-inf info package warnings
midnight ein-loaddefs gnus nnheader subr-x gnus-util rmail
rmail-loaddefs rfc2047 rfc2045 ietf-drums mail-utils mm-util mail-prsvr
wid-edit bbdb-mua bbdb-com crm mailabbrev bbdb-loaddefs bbdb bbdb-site
timezone rcirc server which-func imenu url-handlers url-parse url-vars
paren help-at-pt desktop frameset cus-start cus-load ido seq ess-toolbar
ess-mouse mouseme thingatpt browse-url ess-menu ess-swv ess-noweb
ess-noweb-font-lock-mode ess-bugs-l essd-els ess-sas-d ess-sas-l
ess-sas-a ess-sta-d ess-sta-l cc-vars cc-defs make-regexp ess-sp6-d
ess-dde ess-sp3-d ess-julia ess-r-d ess-r-syntax ess-r-completion
ess-roxy essddr noutline outline easy-mmode hideshow ess-help
ess-r-package ess-s-l ess ess-inf ess-tracebug compile tramp
tramp-compat tramp-loaddefs trampver shell pcomplete comint ansi-color
ring format-spec advice auth-source cl-seq eieio byte-opt bytecomp
byte-compile cl-extra help-mode cconv eieio-core cl-macs eieio-loaddefs
password-cache ess-mode ess-noweb-mode ess-utils ess-generics ess-custom
executable easymenu ess-compat ess-site cl gv cl-loaddefs pcase cl-lib
time-date mule-util tooltip eldoc electric uniquify ediff-hook vc-hooks
lisp-float-type mwheel term/ns-win ns-win ucs-normalize term/common-win
tool-bar dnd fontset image regexp-opt fringe tabulated-list replace
newcomment text-mode elisp-mode lisp-mode prog-mode register page
menu-bar rfn-eshadow isearch timer select scroll-bar mouse jit-lock
font-lock syntax facemenu font-core term/tty-colors frame cl-generic
cham georgian utf-8-lang misc-lang vietnamese tibetan thai tai-viet lao
korean japanese eucjp-ms cp51932 hebrew greek romanian slovak czech
european ethiopic indian cyrillic chinese composite charscript
case-table epa-hook jka-cmpr-hook help simple abbrev obarray minibuffer
cl-preloaded nadvice loaddefs button faces cus-face macroexp files
text-properties overlay sha1 md5 base64 format env code-pages mule
custom widget hashtable-print-readable backquote kqueue cocoa ns
multi-tty make-network-process emacs)

Memory information:
((conses 16 642163 39633)
 (symbols 48 46093 0)
 (miscs 40 7223 57)
 (strings 32 210073 19420)
 (string-bytes 1 5186064)
 (vectors 16 81486)
 (vector-slots 8 1396247 7356)
 (floats 8 1232 676)
 (intervals 56 10786 54)
 (buffers 976 58))

-- 
Sam Steingold (http://sds.podval.org/) on darwin Ns 10.3.1504
http://steingoldpsychology.com http://www.childpsy.net
http://memri.org https://ffii.org http://thereligionofpeace.com
Those who value Life above Freedom are destined to lose both.





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