* Unable to use Cygwin RCS commands in Windows Emacs
@ 2017-09-20 20:12 Heinz Werner Kramski-Grote
2017-09-20 20:40 ` Brian Inglis
` (2 more replies)
0 siblings, 3 replies; 8+ messages in thread
From: Heinz Werner Kramski-Grote @ 2017-09-20 20:12 UTC (permalink / raw)
To: cygwin
At some point in history, /usr/bin/co, /usr/bin/ci, /usr/bin/rlog etc. turned
from .exe into shell scripts, which are now wrappers for the main program
/usr/bin/rcs.exe.
However, these shell scripts can not be called directly from a Windows command
line and moreover can not be invoked by a Windows (not Cygwin) Emacs (25.2
currentlly).
Windows Emacs expects external Windows commands/binaries like co, ci, rlog,
etc. to exist somewhere in the PATH. The commands to be invoked for version
control with RCS are hardcoded into "C:\Program Files\emacs-25.2\share\emacs
\25.2\lisp\vc\vc-rcs.el" and can not be customized, as far as I know.
I tried to create wrapper scripts for Windows too (co.cmd, ci.cmd etc. -
basically just "c:\cygwin\bin\bash -c '/bin/%~n0 %*'"), which work to some
extend on the Windows command line, but mostly fail when invoked from Emacs'
version control functions.
The most recent native Windows port of RCS I could find is version 5.7 and
dates back to 1999. In addition, it uses filenames like "RCS/somefile" instead
of the usual "RCS/somefile,v", so this does not look like a way to go either.
I'm clueless now. Does someone successfully use Cygwin's RCS commands in
Windows Emacs? Is there still an older Cygwin RCS package around which
contains "real" co.exe, ci.exe etc.?
Any help is greatly appreciated.
Heinz
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^ permalink raw reply [flat|nested] 8+ messages in thread* Re: Unable to use Cygwin RCS commands in Windows Emacs
2017-09-20 20:12 Unable to use Cygwin RCS commands in Windows Emacs Heinz Werner Kramski-Grote
@ 2017-09-20 20:40 ` Brian Inglis
2017-09-21 18:57 ` Heinz Werner Kramski-Grote
2017-09-20 21:01 ` cyg Simple
2017-09-22 16:51 ` Andy Moreton
2 siblings, 1 reply; 8+ messages in thread
From: Brian Inglis @ 2017-09-20 20:40 UTC (permalink / raw)
To: cygwin
On 2017-09-20 14:12, Heinz Werner Kramski-Grote wrote:
> At some point in history, /usr/bin/co, /usr/bin/ci, /usr/bin/rlog etc. turned
> from .exe into shell scripts, which are now wrappers for the main program
> /usr/bin/rcs.exe.
>
> However, these shell scripts can not be called directly from a Windows command
> line and moreover can not be invoked by a Windows (not Cygwin) Emacs (25.2
> currentlly).
>
> Windows Emacs expects external Windows commands/binaries like co, ci, rlog,
> etc. to exist somewhere in the PATH. The commands to be invoked for version
> control with RCS are hardcoded into "C:\Program Files\emacs-25.2\share\emacs
> \25.2\lisp\vc\vc-rcs.el" and can not be customized, as far as I know.
>
> I tried to create wrapper scripts for Windows too (co.cmd, ci.cmd etc. -
> basically just "c:\cygwin\bin\bash -c '/bin/%~n0 %*'"), which work to some
> extend on the Windows command line, but mostly fail when invoked from Emacs'
> version control functions.
>
> The most recent native Windows port of RCS I could find is version 5.7 and
> dates back to 1999. In addition, it uses filenames like "RCS/somefile" instead
> of the usual "RCS/somefile,v", so this does not look like a way to go either.
>
> I'm clueless now. Does someone successfully use Cygwin's RCS commands in
> Windows Emacs? Is there still an older Cygwin RCS package around which
> contains "real" co.exe, ci.exe etc.?
>
> Any help is greatly appreciated.
Tried creating shortcuts to the commands in $HOME/bin/, running C:\Cygwin\bin\sh
/bin/cmd %*, and adding $HOME/bin to the start of your Windows PATH?
--
Take care. Thanks, Brian Inglis, Calgary, Alberta, Canada
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^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: Unable to use Cygwin RCS commands in Windows Emacs
2017-09-20 20:12 Unable to use Cygwin RCS commands in Windows Emacs Heinz Werner Kramski-Grote
2017-09-20 20:40 ` Brian Inglis
@ 2017-09-20 21:01 ` cyg Simple
2017-09-21 19:09 ` Heinz Werner Kramski-Grote
2017-09-22 16:51 ` Andy Moreton
2 siblings, 1 reply; 8+ messages in thread
From: cyg Simple @ 2017-09-20 21:01 UTC (permalink / raw)
To: cygwin
On 9/20/2017 4:12 PM, Heinz Werner Kramski-Grote wrote:
> At some point in history, /usr/bin/co, /usr/bin/ci, /usr/bin/rlog etc. turned
> from .exe into shell scripts, which are now wrappers for the main program
> /usr/bin/rcs.exe.
>
> However, these shell scripts can not be called directly from a Windows command
> line and moreover can not be invoked by a Windows (not Cygwin) Emacs (25.2
> currentlly).
>
I suggest you ask your Windows Emacs support list. They would have the
most users with suggestions.
--
cyg Simple
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^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: Unable to use Cygwin RCS commands in Windows Emacs
2017-09-20 20:12 Unable to use Cygwin RCS commands in Windows Emacs Heinz Werner Kramski-Grote
2017-09-20 20:40 ` Brian Inglis
2017-09-20 21:01 ` cyg Simple
@ 2017-09-22 16:51 ` Andy Moreton
2 siblings, 0 replies; 8+ messages in thread
From: Andy Moreton @ 2017-09-22 16:51 UTC (permalink / raw)
To: cygwin
On Wed 20 Sep 2017, Heinz Werner Kramski-Grote wrote:
> At some point in history, /usr/bin/co, /usr/bin/ci, /usr/bin/rlog etc. turned
> from .exe into shell scripts, which are now wrappers for the main program
> /usr/bin/rcs.exe.
>
> However, these shell scripts can not be called directly from a Windows command
> line and moreover can not be invoked by a Windows (not Cygwin) Emacs (25.2
> currentlly).
I don't use RCS, but have other Cygwin tools successfully with the
Windows port of emacs.
The advice below fixes your problem: if a program is an executable then
start-process runs normally, but if it is a script then the arguments
are modified to run the script via the shell:
(setq shell-file-name "/usr/bin/bash")
(setq shell-command-switch "-c")
(defun ajm:start-process-filter-scripts (args)
"Ensure `start-process' can handle executable Cygwin shell scripts."
(let ((program (nth 2 args)))
(if (or (null program) (executable-find program))
args
(list (nth 0 args) (nth 1 args)
shell-file-name shell-command-switch
(mapconcat #'identity (nthcdr 2 args) " ")))))
(advice-add 'start-process :filter-args #'ajm:start-process-filter-scripts)
Using "/usr/bin/bash" for shell-file-name requires using the cygwin-mount
package (available from the MELPA package archive). If you do not use cygwin-mount,
then you will need to use something like "C:\cygwin\bin\bash.exe".
HTH,
AndyM
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^ permalink raw reply [flat|nested] 8+ messages in thread
end of thread, other threads:[~2017-09-22 16:51 UTC | newest]
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2017-09-20 20:12 Unable to use Cygwin RCS commands in Windows Emacs Heinz Werner Kramski-Grote
2017-09-20 20:40 ` Brian Inglis
2017-09-21 18:57 ` Heinz Werner Kramski-Grote
2017-09-20 21:01 ` cyg Simple
2017-09-21 19:09 ` Heinz Werner Kramski-Grote
2017-09-22 2:26 ` David Standish
2017-09-22 10:31 ` Heinz Werner Kramski-Grote
2017-09-22 16:51 ` Andy Moreton
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