bug#73728: 29.3; Specifing an --alternate-editor for emacscleintw.exe with custom --init-directory does not work on Windows

["Jonas Großekathöfer via Bug reports for GNU Emacs, the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>]

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Hi all,

I want emacsclientw.exe to start up an emacs daemon with a custom 
--init-directory in case no server is running. For that case, I think, I 
need to explicitly set the value for the "--alternate-editor"-flag to 
something like:

-a "%UserProfile%\bin\emacs-29.3\bin\runemacs.exe --init-directory 
%APPDATA%\Dotfiles\emacs\.emacs.d\"

However, doing so results in the following error: "file name or argument 
required". This is also true when specifing a relative path (i.e. 
AppData\Dotfiles\emacs\.emacs.d\).

After some more trials with single and/or double qoutes (details see 
below), I got the impression that this behavior is unlikely intentional. 
And I am somewhat confident, that more then one oy my many attempts 
should've been successful. (Note that I raised this issue first here: 
https://emacs.stackexchange.com/a/82355/30098)

For completeness, the full comand ("Target") I am trying to run is:

%UserProfile%\bin\emacs-29.3\bin\emacsclientw.exe -a 
'%UserProfile%\bin\emacs-29.3\bin\runemacs.exe --init-directory 
"AppData\Dotfiles\emacs\.emacs.d\"' -n -c --server-file 
%APPDATA%\Dotfiles\emacs\.emacs.d\server\server

that command starts in

%UserProfile%

ATM, I have as a work around a shortcut to emacscleintw.exe without an 
-a flag. Before using it, I once have to run:

%UserProfile%\bin\emacs-29.3\bin\runemacs.exe --daemon 
----init-directory %APPDATA%\Dotfiles\emacs\.emacs.d\

Obviously, I would rather have to have it all in one place.

And here are the Details, regarding the use of quotes with or without 
relative path for --init-directory:

For the several options using quotes, I got the following problems, 
depending on whether I put single or double quoutes for the whole 
argument or just the path:

Double quotes around the argmument and single quotes for the path, using 
the full path:

-a "%UserProfile%\bin\emacs-29.3\bin\runemacs.exe --init-directory 
'%APPDATA%\Dotfiles\emacs\.emacs.d\'"

--> Warning: "Warning (initialization): Unable to create 
`user-emacs-directory' 
(c:/Users/gross20/'C:/Users/gross20/AppData/Roaming/Dotfiles/emacs/.emacs.d/'/)."

Single quotes around the argmument and double quotes for the path, using 
the full path:

-a '%UserProfile%\bin\emacs-29.3\bin\runemacs.exe --init-directory 
"%APPDATA%\Dotfiles\emacs\.emacs.d\"'

--> Error: Try --help for more information

Double quotes around the argmument and single quotes for the path, using 
a relative path:

-a "%UserProfile%\bin\emacs-29.3\bin\runemacs.exe --init-directory 
'AppData\Roaming\Dotfiles\emacs\.emacs.d\'"

--> Strarts without errors or warning, but the user-emacs-directory is 
"c:/Users/XXX/'AppData/Roaming/Dotfiles/emacs/.emacs.d/'/" (Note the 
single quote in the folder name for AppData)

Single quotes around the argmument and single quotes for the path, using 
a relative path:

-a '%UserProfile%\bin\emacs-29.3\bin\runemacs.exe --init-directory 
"AppData\Dotfiles\emacs\.emacs.d\"'

--> Error: Try --help for more information

And one additional observation: From my many attempts, related or not, I 
also got the impression, that I am closer to what I want ommiting the 
--daemon flag within the argument for the -a flag. However, I need it 
when linking to runemacs.exe directly.

This is my first bug report to this mailing list, hope it contributes a 
tiny tiny bit. (:

Best

Jonas

In GNU Emacs 29.3 (build 2, x86_64-w64-mingw32) of 2024-03-24 built on
  AVALON
Windowing system distributor 'Microsoft Corp.', version 10.0.19045
System Description: Microsoft Windows 10 Enterprise 
(v10.0.2009.19045.4894)

Configured using:
  'configure --with-modules --without-dbus --with-native-compilation=aot
  --without-compress-install --with-sqlite3 --with-tree-sitter
  CFLAGS=-O2'

Configured features:
ACL GIF GMP GNUTLS HARFBUZZ JPEG JSON LCMS2 LIBXML2 MODULES NATIVE_COMP
NOTIFY W32NOTIFY PDUMPER PNG RSVG SOUND SQLITE3 THREADS TIFF
TOOLKIT_SCROLL_BARS TREE_SITTER WEBP XPM ZLIB

(NATIVE_COMP present but libgccjit not available)

Important settings:
   value of $LANG: DEU
   locale-coding-system: cp1252

Major mode: Org-Agenda Week Ddl Grid

Minor modes in effect:
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   server-mode: t
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   line-number-mode: t
   transient-mark-mode: t
   auto-composition-mode: t
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   auto-compression-mode: t

Load-path shadows:
c:/Users/XXX/Dotfiles/emacs/.emacs.d/elpa/transient-0.7.4/transient 
hides c:/Users/gross20/bin/emacs-29.3/share/emacs/29.3/lisp/transient

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hashtable-print-readable backquote threads w32notify w32 lcms2 multi-tty
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