Re: [racket-users] Detect version of OS X

2016-02-24 Thread Norman Gray 


Jens Axel, hello.

On 24 Feb 2016, at 14:04, Jens Axel Søgaard wrote:


What happens if  /Library/Tex/texbin is present - but not in the path?


A good point.

Using Matthew's reminder of the existence of find-executable-path (which 
I've used before, but was too focused on "system" here), how about:


#lang racket/base

(require racket/string)

(let ([p (string-join `("/Library/TeX/texbin"
"/usr/texbin"
;; ...plus anywhere else I can think of...
,(getenv "PATH"))
  ":")])
  (parameterize ([current-environment-variables
  (make-environment-variables #"PATH" 
(string->bytes/utf-8 p))])

(let-values ([(base name must-be-dir?)
  (split-path
   (find-executable-path "tex"))])
  (printf "binaries in ~a~%" base

That encodes some platform-specific knowledge in the list of possible 
binary locations, but it can be extended to 'everywhere I've ever heard 
of a LaTeX binary ending up, on any platform, plus some extra 
heuristics', and still be fairly robust.


All the best,

Norman


--
Norman Gray  :  https://nxg.me.uk
SUPA School of Physics and Astronomy, University of Glasgow, UK

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Re: [racket-users] Detect version of OS X

2016-02-24 Thread Jens Axel Søgaard 
What happens if  /Library/Tex/texbin is present - but not in the path?

/Jens Axel


2016-02-24 14:34 GMT+01:00 Stephen De Gabrielle :

> Thank you - very good advice - I'll have to change my pull request.
> S.
>
> On Wed, 24 Feb 2016 at 10:57, Norman Gray  wrote:
>
>>
>> Greetings
>>
>> On 23 Feb 2016, at 20:46, Jens Axel Søgaard wrote:
>>
>> > Use case: The paths to LaTeX has changed on El Capitan,
>> > which makes it difficult to choose a default path, that works
>> > for all.
>>
>> Addressing that particular use-case (following the motto that one should
>> test the functionality rather than switch on the version), and if a
>> system call is OK, then adapting Stephen De Gabrielle's example you
>> could try
>>
>> #lang racket/base
>> (require racket/system racket/port)
>>
>> (let-values (((base name must-be-dir?)
>>(split-path
>> (string->path
>>  (with-output-to-string (λ ()
>>   (system "which tex")))
>>(printf "binaries in ~a~%" base))
>>
>> or call out to "tlmgr conf" or one of its subcommands (if your
>> installation is based on TeXLive).  This would obviously work on other
>> unixes, and there might be a path-searching equivalent on Windows, too.
>>
>> All the best,
>>
>> Norman
>>
>>
>> --
>> Norman Gray  :  https://nxg.me.uk
>> SUPA School of Physics and Astronomy, University of Glasgow, UK
>>
>> --
>> You received this message because you are subscribed to the Google Groups
>> "Racket Users" group.
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>


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-- 
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Re: [racket-users] Detect version of OS X

2016-02-24 Thread Matthew Flatt 
I recommend `find-executable-path` instead of `system` plus "which".

At Wed, 24 Feb 2016 13:34:19 +, Stephen De Gabrielle wrote:
> Thank you - very good advice - I'll have to change my pull request.
> S.
> On Wed, 24 Feb 2016 at 10:57, Norman Gray  wrote:
> 
> >
> > Greetings
> >
> > On 23 Feb 2016, at 20:46, Jens Axel Søgaard wrote:
> >
> > > Use case: The paths to LaTeX has changed on El Capitan,
> > > which makes it difficult to choose a default path, that works
> > > for all.
> >
> > Addressing that particular use-case (following the motto that one should
> > test the functionality rather than switch on the version), and if a
> > system call is OK, then adapting Stephen De Gabrielle's example you
> > could try
> >
> > #lang racket/base
> > (require racket/system racket/port)
> >
> > (let-values (((base name must-be-dir?)
> >(split-path
> > (string->path
> >  (with-output-to-string (λ ()
> >   (system "which tex")))
> >(printf "binaries in ~a~%" base))
> >
> > or call out to "tlmgr conf" or one of its subcommands (if your
> > installation is based on TeXLive).  This would obviously work on other
> > unixes, and there might be a path-searching equivalent on Windows, too.
> >
> > All the best,
> >
> > Norman
> >
> >
> > --
> > Norman Gray  :  https://nxg.me.uk
> > SUPA School of Physics and Astronomy, University of Glasgow, UK
> >
> > --
> > You received this message because you are subscribed to the Google Groups
> > "Racket Users" group.
> > To unsubscribe from this group and stop receiving emails from it, send an
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> >
> 
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Re: [racket-users] Detect version of OS X

2016-02-24 Thread Stephen De Gabrielle 
Thank you - very good advice - I'll have to change my pull request.
S.
On Wed, 24 Feb 2016 at 10:57, Norman Gray  wrote:

>
> Greetings
>
> On 23 Feb 2016, at 20:46, Jens Axel Søgaard wrote:
>
> > Use case: The paths to LaTeX has changed on El Capitan,
> > which makes it difficult to choose a default path, that works
> > for all.
>
> Addressing that particular use-case (following the motto that one should
> test the functionality rather than switch on the version), and if a
> system call is OK, then adapting Stephen De Gabrielle's example you
> could try
>
> #lang racket/base
> (require racket/system racket/port)
>
> (let-values (((base name must-be-dir?)
>(split-path
> (string->path
>  (with-output-to-string (λ ()
>   (system "which tex")))
>(printf "binaries in ~a~%" base))
>
> or call out to "tlmgr conf" or one of its subcommands (if your
> installation is based on TeXLive).  This would obviously work on other
> unixes, and there might be a path-searching equivalent on Windows, too.
>
> All the best,
>
> Norman
>
>
> --
> Norman Gray  :  https://nxg.me.uk
> SUPA School of Physics and Astronomy, University of Glasgow, UK
>
> --
> You received this message because you are subscribed to the Google Groups
> "Racket Users" group.
> To unsubscribe from this group and stop receiving emails from it, send an
> email to racket-users+unsubscr...@googlegroups.com.
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>

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Re: [racket-users] Detect version of OS X

2016-02-24 Thread Norman Gray 


Greetings

On 23 Feb 2016, at 20:46, Jens Axel Søgaard wrote:


Use case: The paths to LaTeX has changed on El Capitan,
which makes it difficult to choose a default path, that works
for all.


Addressing that particular use-case (following the motto that one should 
test the functionality rather than switch on the version), and if a 
system call is OK, then adapting Stephen De Gabrielle's example you 
could try


#lang racket/base
(require racket/system racket/port)

(let-values (((base name must-be-dir?)
  (split-path
   (string->path
(with-output-to-string (λ ()
 (system "which tex")))
  (printf "binaries in ~a~%" base))

or call out to "tlmgr conf" or one of its subcommands (if your 
installation is based on TeXLive).  This would obviously work on other 
unixes, and there might be a path-searching equivalent on Windows, too.


All the best,

Norman


--
Norman Gray  :  https://nxg.me.uk
SUPA School of Physics and Astronomy, University of Glasgow, UK

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Re: [racket-users] Detect version of OS X

2016-02-23 Thread Stephen De Gabrielle 
what about this?

#lang racket/base
(require racket/system
 racket/port)

(substring (with-output-to-string (lambda () (system "sw_vers
-productVersion"))) 3 5)

I get "10" or "11" respectively, and I believe it will run on older
versions OS X.

s.



On Tue, Feb 23, 2016 at 9:38 PM Jens Axel Søgaard 
wrote:

> The system-type approach looks like this (it ignores the optional third
> version counter):
>
> (match (regexp-match #px".*Kernel Version ([\\d]+[.][\\d]+).*"
> (system-type 'machine))
>   [(list _ version-str) (string->number version-str)]
>   [_ #f])
>
> The expression returns 15.0 on my machine.
>
> The AppKit approach seems to be less likely to break over time?
>
> /Jens Axel
>
>
>
> 2016-02-23 22:23 GMT+01:00 Matthew Flatt :
>
>> You could parse the result of `(system-type 'machine)`, but you might
>> just as well use a little `ffi/unsafe` binding to get
>> `NSAppKitVersionNumber`:
>>
>>  #lang racket/base
>>  (require ffi/unsafe)
>>
>>  (define appkit
>>(ffi-lib "/System/Library/Frameworks/AppKit.framework/AppKit"))
>>  (define NSAppKitVersionNumber
>>(and appkit (get-ffi-obj 'NSAppKitVersionNumber appkit _double)))
>>
>>  (define (version-10.11-or-later?)
>>(NSAppKitVersionNumber . >= . 1389))
>>
>>
>> At Tue, 23 Feb 2016 21:46:55 +0100, Jens Axel Søgaard wrote:
>> > Hi All,
>> >
>> > The function system-type can be used to detect the system type.
>> > Is there a function that returns the version of the operating system?
>> >
>> > Use case: The paths to LaTeX has changed on El Capitan,
>> > which makes it difficult to choose a default path, that works
>> > for all.
>> >
>> > /Jens Axel
>> >
>> > --
>> > You received this message because you are subscribed to the Google
>> Groups
>> > "Racket Users" group.
>> > To unsubscribe from this group and stop receiving emails from it, send
>> an
>> > email to racket-users+unsubscr...@googlegroups.com.
>> > For more options, visit https://groups.google.com/d/optout.
>>
>> --
>> You received this message because you are subscribed to the Google Groups
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>>
>
>
>
> --
> --
> Jens Axel Søgaard
>
> --
> You received this message because you are subscribed to the Google Groups
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Re: [racket-users] Detect version of OS X

2016-02-23 Thread Jens Axel Søgaard 
The system-type approach looks like this (it ignores the optional third
version counter):

(match (regexp-match #px".*Kernel Version ([\\d]+[.][\\d]+).*"
(system-type 'machine))
  [(list _ version-str) (string->number version-str)]
  [_ #f])

The expression returns 15.0 on my machine.

The AppKit approach seems to be less likely to break over time?

/Jens Axel



2016-02-23 22:23 GMT+01:00 Matthew Flatt :

> You could parse the result of `(system-type 'machine)`, but you might
> just as well use a little `ffi/unsafe` binding to get
> `NSAppKitVersionNumber`:
>
>  #lang racket/base
>  (require ffi/unsafe)
>
>  (define appkit
>(ffi-lib "/System/Library/Frameworks/AppKit.framework/AppKit"))
>  (define NSAppKitVersionNumber
>(and appkit (get-ffi-obj 'NSAppKitVersionNumber appkit _double)))
>
>  (define (version-10.11-or-later?)
>(NSAppKitVersionNumber . >= . 1389))
>
>
> At Tue, 23 Feb 2016 21:46:55 +0100, Jens Axel Søgaard wrote:
> > Hi All,
> >
> > The function system-type can be used to detect the system type.
> > Is there a function that returns the version of the operating system?
> >
> > Use case: The paths to LaTeX has changed on El Capitan,
> > which makes it difficult to choose a default path, that works
> > for all.
> >
> > /Jens Axel
> >
> > --
> > You received this message because you are subscribed to the Google Groups
> > "Racket Users" group.
> > To unsubscribe from this group and stop receiving emails from it, send an
> > email to racket-users+unsubscr...@googlegroups.com.
> > For more options, visit https://groups.google.com/d/optout.
>
> --
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>



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-- 
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Re: [racket-users] Detect version of OS X

2016-02-23 Thread Matthew Flatt 
You could parse the result of `(system-type 'machine)`, but you might
just as well use a little `ffi/unsafe` binding to get
`NSAppKitVersionNumber`:

 #lang racket/base
 (require ffi/unsafe)

 (define appkit
   (ffi-lib "/System/Library/Frameworks/AppKit.framework/AppKit"))
 (define NSAppKitVersionNumber
   (and appkit (get-ffi-obj 'NSAppKitVersionNumber appkit _double)))

 (define (version-10.11-or-later?)
   (NSAppKitVersionNumber . >= . 1389))


At Tue, 23 Feb 2016 21:46:55 +0100, Jens Axel Søgaard wrote:
> Hi All,
> 
> The function system-type can be used to detect the system type.
> Is there a function that returns the version of the operating system?
> 
> Use case: The paths to LaTeX has changed on El Capitan,
> which makes it difficult to choose a default path, that works
> for all.
> 
> /Jens Axel
> 
> -- 
> You received this message because you are subscribed to the Google Groups 
> "Racket Users" group.
> To unsubscribe from this group and stop receiving emails from it, send an 
> email to racket-users+unsubscr...@googlegroups.com.
> For more options, visit https://groups.google.com/d/optout.

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