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xkeyval -- read keys from file

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xkeyval — read keys from file

5

I want to read xkeyval options from an external file, like:

setkeysmy@keysinputconf

I tried several combinations of edef and expandafter, but to no avail. Any ideas?

Best regards,

Nicolas

xkeyval

share|improve this question

asked 4 hours ago

NicolaF_NicolaF_

563

add a comment | 

5

I want to read xkeyval options from an external file, like:

setkeysmy@keysinputconf

I tried several combinations of edef and expandafter, but to no avail. Any ideas?

Best regards,

Nicolas

xkeyval

share|improve this question

asked 4 hours ago

NicolaF_NicolaF_

563

add a comment | 

I want to read xkeyval options from an external file, like:

setkeysmy@keysinputconf

I tried several combinations of edef and expandafter, but to no avail. Any ideas?

Best regards,

Nicolas

xkeyval

share|improve this question

asked 4 hours ago

NicolaF_NicolaF_

563

setkeysmy@keysinputconf

share|improve this question

asked 4 hours ago

NicolaF_NicolaF_

563

share|improve this question

asked 4 hours ago

NicolaF_NicolaF_

563

asked 4 hours ago

NicolaF_NicolaF_

563

asked 4 hours ago

NicolaF_NicolaF_

563

1 Answer
1

active

oldest

votes

5

You can't edef an input because it isn't expandable. You have to first read the contents of the file to a temporary variable and then pass that to setkeys.

Here's an expl3 implementation of setkeysFile. It's the same as the standard setkeys except that the second argument is a file that (should) contain a comma separated list of key-value pairs.

RequirePackagefilecontents
beginfilecontents*conf.tex
hello = world :D,
goodnews = everyone!,
endfilecontents*
documentclassarticle
usepackagexkeyval
makeatletter
define@keymy@keyshellodeftowhom#1
define@keymy@keysgoodnewsdefwho#1
makeatother

usepackagexparse
ExplSyntaxOn
tl_new:N l__nicolas_setkeys_tl
NewDocumentCommand setkeysFile m m 
 
 file_get:nnNTF #2 l__nicolas_setkeys_tl
 exp_args:NnV setkeys #1 l__nicolas_setkeys_tl 
 __kernel_msg_error:nnn kernel file-not-found #2 
 
ExplSyntaxOff

begindocument

setkeysFilemy@keysconf

Hello towhom

Good news who

enddocument

this prints:

share|improve this answer

edited 3 hours ago

egreg

736k8919353261

answered 4 hours ago

Phelype OleinikPhelype Oleinik

25.9k54691

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  exp_args:NnV setkeys#1 l__nicolas_setkeys_tl already supplies the braces and is more correct code anyhow. The ior_open:Nn business is useless.
  
  – egreg
  3 hours ago
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Thanks :-) But why more correct? Oh, nevermind, it's because V gets the value of a register, and a register is an N type. Am I correct?
  
  – Phelype Oleinik
  3 hours ago
  
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  @PhelypeOleinik Because a V-type argument must be a single token
  
  – Joseph Wright♦
  3 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @JosephWright Thanks! Some day I'll learn how to use expl3 properly :)
  
  – Phelype Oleinik
  3 hours ago
  

  
  
  
  

add a comment | 

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5

You can't edef an input because it isn't expandable. You have to first read the contents of the file to a temporary variable and then pass that to setkeys.

Here's an expl3 implementation of setkeysFile. It's the same as the standard setkeys except that the second argument is a file that (should) contain a comma separated list of key-value pairs.

RequirePackagefilecontents
beginfilecontents*conf.tex
hello = world :D,
goodnews = everyone!,
endfilecontents*
documentclassarticle
usepackagexkeyval
makeatletter
define@keymy@keyshellodeftowhom#1
define@keymy@keysgoodnewsdefwho#1
makeatother

usepackagexparse
ExplSyntaxOn
tl_new:N l__nicolas_setkeys_tl
NewDocumentCommand setkeysFile m m 
 
 file_get:nnNTF #2 l__nicolas_setkeys_tl
 exp_args:NnV setkeys #1 l__nicolas_setkeys_tl 
 __kernel_msg_error:nnn kernel file-not-found #2 
 
ExplSyntaxOff

begindocument

setkeysFilemy@keysconf

Hello towhom

Good news who

enddocument

this prints:

share|improve this answer

edited 3 hours ago

egreg

736k8919353261

answered 4 hours ago

Phelype OleinikPhelype Oleinik

25.9k54691

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  exp_args:NnV setkeys#1 l__nicolas_setkeys_tl already supplies the braces and is more correct code anyhow. The ior_open:Nn business is useless.
  
  – egreg
  3 hours ago
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Thanks :-) But why more correct? Oh, nevermind, it's because V gets the value of a register, and a register is an N type. Am I correct?
  
  – Phelype Oleinik
  3 hours ago
  
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  @PhelypeOleinik Because a V-type argument must be a single token
  
  – Joseph Wright♦
  3 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @JosephWright Thanks! Some day I'll learn how to use expl3 properly :)
  
  – Phelype Oleinik
  3 hours ago
  

  
  
  
  

add a comment | 

5

You can't edef an input because it isn't expandable. You have to first read the contents of the file to a temporary variable and then pass that to setkeys.

Here's an expl3 implementation of setkeysFile. It's the same as the standard setkeys except that the second argument is a file that (should) contain a comma separated list of key-value pairs.

RequirePackagefilecontents
beginfilecontents*conf.tex
hello = world :D,
goodnews = everyone!,
endfilecontents*
documentclassarticle
usepackagexkeyval
makeatletter
define@keymy@keyshellodeftowhom#1
define@keymy@keysgoodnewsdefwho#1
makeatother

usepackagexparse
ExplSyntaxOn
tl_new:N l__nicolas_setkeys_tl
NewDocumentCommand setkeysFile m m 
 
 file_get:nnNTF #2 l__nicolas_setkeys_tl
 exp_args:NnV setkeys #1 l__nicolas_setkeys_tl 
 __kernel_msg_error:nnn kernel file-not-found #2 
 
ExplSyntaxOff

begindocument

setkeysFilemy@keysconf

Hello towhom

Good news who

enddocument

this prints:

share|improve this answer

edited 3 hours ago

egreg

736k8919353261

answered 4 hours ago

Phelype OleinikPhelype Oleinik

25.9k54691

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  exp_args:NnV setkeys#1 l__nicolas_setkeys_tl already supplies the braces and is more correct code anyhow. The ior_open:Nn business is useless.
  
  – egreg
  3 hours ago
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Thanks :-) But why more correct? Oh, nevermind, it's because V gets the value of a register, and a register is an N type. Am I correct?
  
  – Phelype Oleinik
  3 hours ago
  
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  @PhelypeOleinik Because a V-type argument must be a single token
  
  – Joseph Wright♦
  3 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @JosephWright Thanks! Some day I'll learn how to use expl3 properly :)
  
  – Phelype Oleinik
  3 hours ago
  

  
  
  
  

add a comment | 

You can't edef an input because it isn't expandable. You have to first read the contents of the file to a temporary variable and then pass that to setkeys.

Here's an expl3 implementation of setkeysFile. It's the same as the standard setkeys except that the second argument is a file that (should) contain a comma separated list of key-value pairs.

RequirePackagefilecontents
beginfilecontents*conf.tex
hello = world :D,
goodnews = everyone!,
endfilecontents*
documentclassarticle
usepackagexkeyval
makeatletter
define@keymy@keyshellodeftowhom#1
define@keymy@keysgoodnewsdefwho#1
makeatother

usepackagexparse
ExplSyntaxOn
tl_new:N l__nicolas_setkeys_tl
NewDocumentCommand setkeysFile m m 
 
 file_get:nnNTF #2 l__nicolas_setkeys_tl
 exp_args:NnV setkeys #1 l__nicolas_setkeys_tl 
 __kernel_msg_error:nnn kernel file-not-found #2 
 
ExplSyntaxOff

begindocument

setkeysFilemy@keysconf

Hello towhom

Good news who

enddocument

this prints:

share|improve this answer

edited 3 hours ago

egreg

736k8919353261

answered 4 hours ago

Phelype OleinikPhelype Oleinik

25.9k54691

RequirePackagefilecontents
beginfilecontents*conf.tex
hello = world :D,
goodnews = everyone!,
endfilecontents*
documentclassarticle
usepackagexkeyval
makeatletter
define@keymy@keyshellodeftowhom#1
define@keymy@keysgoodnewsdefwho#1
makeatother

usepackagexparse
ExplSyntaxOn
tl_new:N l__nicolas_setkeys_tl
NewDocumentCommand setkeysFile m m 
 
 file_get:nnNTF #2 l__nicolas_setkeys_tl
 exp_args:NnV setkeys #1 l__nicolas_setkeys_tl 
 __kernel_msg_error:nnn kernel file-not-found #2 
 
ExplSyntaxOff

begindocument

setkeysFilemy@keysconf

Hello towhom

Good news who

enddocument

share|improve this answer

edited 3 hours ago

egreg

736k8919353261

answered 4 hours ago

Phelype OleinikPhelype Oleinik

25.9k54691

edited 3 hours ago

egreg

736k8919353261

edited 3 hours ago

egreg

736k8919353261

answered 4 hours ago

Phelype OleinikPhelype Oleinik

25.9k54691

answered 4 hours ago

Phelype OleinikPhelype Oleinik

25.9k54691