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4

1

I need to include file, but I want to manipulate it directly from PDFLaTeX.
I must remove any text which is betweem { and }, including backslashes and parenthesis. I have tried many escaping options, but the best I could get it this and it is not working:

input{|"cat cxf.tex | sed 's|\{.*\}||g'"}

Is this possible at all?

input brackets

share|improve this question

asked 10 hours ago

meolicmeolic

12122 bronze badges

New contributor

meolic is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Welcome to TeX.SE. Are you open to using LuaLaTeX instead of pdfLaTeX?
  
  – Mico
  10 hours ago
  

  
  
  
  

add a comment | 

4

1

I need to include file, but I want to manipulate it directly from PDFLaTeX.
I must remove any text which is betweem { and }, including backslashes and parenthesis. I have tried many escaping options, but the best I could get it this and it is not working:

input{|"cat cxf.tex | sed 's|\{.*\}||g'"}

Is this possible at all?

input brackets

share|improve this question

asked 10 hours ago

meolicmeolic

12122 bronze badges

New contributor

meolic is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Welcome to TeX.SE. Are you open to using LuaLaTeX instead of pdfLaTeX?
  
  – Mico
  10 hours ago
  

  
  
  
  

add a comment | 

I need to include file, but I want to manipulate it directly from PDFLaTeX.
I must remove any text which is betweem { and }, including backslashes and parenthesis. I have tried many escaping options, but the best I could get it this and it is not working:

input{|"cat cxf.tex | sed 's|\{.*\}||g'"}

Is this possible at all?

input brackets

share|improve this question

asked 10 hours ago

meolicmeolic

12122 bronze badges

New contributor

meolic is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

input{|"cat cxf.tex | sed 's|\{.*\}||g'"}

share|improve this question

asked 10 hours ago

meolicmeolic

12122 bronze badges

New contributor

meolic is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

share|improve this question

asked 10 hours ago

meolicmeolic

12122 bronze badges

New contributor

meolic is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

asked 10 hours ago

meolicmeolic

12122 bronze badges

New contributor

meolic is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

asked 10 hours ago

meolicmeolic

12122 bronze badges

2 Answers
2

active

oldest

votes

5

This works for me (with pdflatex -shell-escape, of course) and prints just “abc”.

begin{filecontents*}{jobname-test.tex}

abc{def}

end{filecontents*}



documentclass{article}



begin{document}



input{|"cat jobname-test.tex | sed 's|string\{.*string\}||g'"}



end{document}

The issue is that TeX performs macro expansion on the argument to input; with string\ we nullify the macro nature of \.

I use jobname just for avoiding the risk of clobbering my files.

If you want a non-greedy replacement, it's a bit more complicated (you could use Perl, instead). The search string should be something like

\{[^\}]*\}

This can be more easily accomplished by defining the string beforehand:

begin{filecontents*}{jobname-test.tex}

abc{def}ghi{jkl}

end{filecontents*}



documentclass{article}



begin{document}



edefsearchstring{string\string{[^string\string}]*string\string}}

input{|"cat jobname-test.tex | sed 's|searchstring||g'"}



end{document}

In this case the output would by “abcghi”.

share|improve this answer

edited 7 hours ago

answered 10 hours ago

egregegreg

754k9090 gold badges19771977 silver badges33163316 bronze badges

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  +1 :) just wondered if the match might be .*? so as to be non-greedy?
  
  – cmhughes
  7 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @cmhughes As far as I know, sed doesn't support non-greedy search strings.
  
  – egreg
  7 hours ago
  

  
  
  
  

add a comment | 

4

Assuming you're free to use LuaLaTeX, and assuming further that the material between { and } (including the delimiters) is all on one line, the following solution should work just fine for you.

The solution consists of a Lua function (stored in an external file) and two LaTeX macros; the first assigns the Lua function to the process_input_buffer callback, making it act like a preprocessor, and the second removes the preprocessor-like operation of the Lua function.

The pattern-matching operation, "\{.-\}", uses .- rather than -* to match "zero or more instances of any character". Observe that using -* would be a mistake here, as it would make Lua perform a "greedy" match and thus inappropriately obliterate the middle substring, uvw.

RequirePackage{filecontents}

%% External file with "{ ... }" material

begin{filecontents*}{cxf.tex}

$abc {...} uvw { int_0^1 } xyz$



abc{ ... }uvw{ int_0^1 }xyz

end{filecontents*}



% Place the Lua code in a separate external file

begin{filecontents*}{external.lua}

function remove_braced_stuff ( s )

   return ( s:gsub ( "\{.-\}" , "" ) )

end

end{filecontents*}



documentclass{article}

%% Load the Lua function from the external file

directlua{dofile("external.lua")}



%% Two utility LaTeX macros

newcommand{RemoveBracedStuff}{directlua{

  luatexbase.add_to_callback ( "process_input_buffer" , 

    remove_braced_stuff , "removestuff" )}}

newcommand{DontRemoveBracedStuff}{directlua{

  luatexbase.remove_from_callback ( "process_input_buffer" , 

    "removestuff" )}}



begin{document}

RemoveBracedStuff % Enable the Lua function

input cxf % Load the external file



DontRemoveBracedStuff % Disable the Lua function

%% remainder of document

end{document}

share|improve this answer

edited 7 hours ago

answered 10 hours ago

MicoMico

296k3232 gold badges410410 silver badges808808 bronze badges

add a comment | 

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5

This works for me (with pdflatex -shell-escape, of course) and prints just “abc”.

begin{filecontents*}{jobname-test.tex}

abc{def}

end{filecontents*}



documentclass{article}



begin{document}



input{|"cat jobname-test.tex | sed 's|string\{.*string\}||g'"}



end{document}

The issue is that TeX performs macro expansion on the argument to input; with string\ we nullify the macro nature of \.

I use jobname just for avoiding the risk of clobbering my files.

If you want a non-greedy replacement, it's a bit more complicated (you could use Perl, instead). The search string should be something like

\{[^\}]*\}

This can be more easily accomplished by defining the string beforehand:

begin{filecontents*}{jobname-test.tex}

abc{def}ghi{jkl}

end{filecontents*}



documentclass{article}



begin{document}



edefsearchstring{string\string{[^string\string}]*string\string}}

input{|"cat jobname-test.tex | sed 's|searchstring||g'"}



end{document}

In this case the output would by “abcghi”.

share|improve this answer

edited 7 hours ago

answered 10 hours ago

egregegreg

754k9090 gold badges19771977 silver badges33163316 bronze badges

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  +1 :) just wondered if the match might be .*? so as to be non-greedy?
  
  – cmhughes
  7 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @cmhughes As far as I know, sed doesn't support non-greedy search strings.
  
  – egreg
  7 hours ago
  

  
  
  
  

add a comment | 

5

This works for me (with pdflatex -shell-escape, of course) and prints just “abc”.

begin{filecontents*}{jobname-test.tex}

abc{def}

end{filecontents*}



documentclass{article}



begin{document}



input{|"cat jobname-test.tex | sed 's|string\{.*string\}||g'"}



end{document}

The issue is that TeX performs macro expansion on the argument to input; with string\ we nullify the macro nature of \.

I use jobname just for avoiding the risk of clobbering my files.

If you want a non-greedy replacement, it's a bit more complicated (you could use Perl, instead). The search string should be something like

\{[^\}]*\}

This can be more easily accomplished by defining the string beforehand:

begin{filecontents*}{jobname-test.tex}

abc{def}ghi{jkl}

end{filecontents*}



documentclass{article}



begin{document}



edefsearchstring{string\string{[^string\string}]*string\string}}

input{|"cat jobname-test.tex | sed 's|searchstring||g'"}



end{document}

In this case the output would by “abcghi”.

share|improve this answer

edited 7 hours ago

answered 10 hours ago

egregegreg

754k9090 gold badges19771977 silver badges33163316 bronze badges

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  +1 :) just wondered if the match might be .*? so as to be non-greedy?
  
  – cmhughes
  7 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @cmhughes As far as I know, sed doesn't support non-greedy search strings.
  
  – egreg
  7 hours ago
  

  
  
  
  

add a comment | 

This works for me (with pdflatex -shell-escape, of course) and prints just “abc”.

begin{filecontents*}{jobname-test.tex}

abc{def}

end{filecontents*}



documentclass{article}



begin{document}



input{|"cat jobname-test.tex | sed 's|string\{.*string\}||g'"}



end{document}

The issue is that TeX performs macro expansion on the argument to input; with string\ we nullify the macro nature of \.

I use jobname just for avoiding the risk of clobbering my files.

If you want a non-greedy replacement, it's a bit more complicated (you could use Perl, instead). The search string should be something like

\{[^\}]*\}

This can be more easily accomplished by defining the string beforehand:

begin{filecontents*}{jobname-test.tex}

abc{def}ghi{jkl}

end{filecontents*}



documentclass{article}



begin{document}



edefsearchstring{string\string{[^string\string}]*string\string}}

input{|"cat jobname-test.tex | sed 's|searchstring||g'"}



end{document}

In this case the output would by “abcghi”.

share|improve this answer

edited 7 hours ago

answered 10 hours ago

egregegreg

754k9090 gold badges19771977 silver badges33163316 bronze badges

begin{filecontents*}{jobname-test.tex}

abc{def}

end{filecontents*}



documentclass{article}



begin{document}



input{|"cat jobname-test.tex | sed 's|string\{.*string\}||g'"}



end{document}

\{[^\}]*\}

begin{filecontents*}{jobname-test.tex}

abc{def}ghi{jkl}

end{filecontents*}



documentclass{article}



begin{document}



edefsearchstring{string\string{[^string\string}]*string\string}}

input{|"cat jobname-test.tex | sed 's|searchstring||g'"}



end{document}

share|improve this answer

edited 7 hours ago

answered 10 hours ago

egregegreg

754k9090 gold badges19771977 silver badges33163316 bronze badges

answered 10 hours ago

egregegreg

754k9090 gold badges19771977 silver badges33163316 bronze badges

answered 10 hours ago

egregegreg

754k9090 gold badges19771977 silver badges33163316 bronze badges

4

Assuming you're free to use LuaLaTeX, and assuming further that the material between { and } (including the delimiters) is all on one line, the following solution should work just fine for you.

The solution consists of a Lua function (stored in an external file) and two LaTeX macros; the first assigns the Lua function to the process_input_buffer callback, making it act like a preprocessor, and the second removes the preprocessor-like operation of the Lua function.

The pattern-matching operation, "\{.-\}", uses .- rather than -* to match "zero or more instances of any character". Observe that using -* would be a mistake here, as it would make Lua perform a "greedy" match and thus inappropriately obliterate the middle substring, uvw.

RequirePackage{filecontents}

%% External file with "{ ... }" material

begin{filecontents*}{cxf.tex}

$abc {...} uvw { int_0^1 } xyz$



abc{ ... }uvw{ int_0^1 }xyz

end{filecontents*}



% Place the Lua code in a separate external file

begin{filecontents*}{external.lua}

function remove_braced_stuff ( s )

   return ( s:gsub ( "\{.-\}" , "" ) )

end

end{filecontents*}



documentclass{article}

%% Load the Lua function from the external file

directlua{dofile("external.lua")}



%% Two utility LaTeX macros

newcommand{RemoveBracedStuff}{directlua{

  luatexbase.add_to_callback ( "process_input_buffer" , 

    remove_braced_stuff , "removestuff" )}}

newcommand{DontRemoveBracedStuff}{directlua{

  luatexbase.remove_from_callback ( "process_input_buffer" , 

    "removestuff" )}}



begin{document}

RemoveBracedStuff % Enable the Lua function

input cxf % Load the external file



DontRemoveBracedStuff % Disable the Lua function

%% remainder of document

end{document}

share|improve this answer

edited 7 hours ago

answered 10 hours ago

MicoMico

296k3232 gold badges410410 silver badges808808 bronze badges

add a comment | 

4

Assuming you're free to use LuaLaTeX, and assuming further that the material between { and } (including the delimiters) is all on one line, the following solution should work just fine for you.

The solution consists of a Lua function (stored in an external file) and two LaTeX macros; the first assigns the Lua function to the process_input_buffer callback, making it act like a preprocessor, and the second removes the preprocessor-like operation of the Lua function.

The pattern-matching operation, "\{.-\}", uses .- rather than -* to match "zero or more instances of any character". Observe that using -* would be a mistake here, as it would make Lua perform a "greedy" match and thus inappropriately obliterate the middle substring, uvw.

RequirePackage{filecontents}

%% External file with "{ ... }" material

begin{filecontents*}{cxf.tex}

$abc {...} uvw { int_0^1 } xyz$



abc{ ... }uvw{ int_0^1 }xyz

end{filecontents*}



% Place the Lua code in a separate external file

begin{filecontents*}{external.lua}

function remove_braced_stuff ( s )

   return ( s:gsub ( "\{.-\}" , "" ) )

end

end{filecontents*}



documentclass{article}

%% Load the Lua function from the external file

directlua{dofile("external.lua")}



%% Two utility LaTeX macros

newcommand{RemoveBracedStuff}{directlua{

  luatexbase.add_to_callback ( "process_input_buffer" , 

    remove_braced_stuff , "removestuff" )}}

newcommand{DontRemoveBracedStuff}{directlua{

  luatexbase.remove_from_callback ( "process_input_buffer" , 

    "removestuff" )}}



begin{document}

RemoveBracedStuff % Enable the Lua function

input cxf % Load the external file



DontRemoveBracedStuff % Disable the Lua function

%% remainder of document

end{document}

share|improve this answer

edited 7 hours ago

answered 10 hours ago

MicoMico

296k3232 gold badges410410 silver badges808808 bronze badges

add a comment | 

Assuming you're free to use LuaLaTeX, and assuming further that the material between { and } (including the delimiters) is all on one line, the following solution should work just fine for you.

The solution consists of a Lua function (stored in an external file) and two LaTeX macros; the first assigns the Lua function to the process_input_buffer callback, making it act like a preprocessor, and the second removes the preprocessor-like operation of the Lua function.

The pattern-matching operation, "\{.-\}", uses .- rather than -* to match "zero or more instances of any character". Observe that using -* would be a mistake here, as it would make Lua perform a "greedy" match and thus inappropriately obliterate the middle substring, uvw.

RequirePackage{filecontents}

%% External file with "{ ... }" material

begin{filecontents*}{cxf.tex}

$abc {...} uvw { int_0^1 } xyz$



abc{ ... }uvw{ int_0^1 }xyz

end{filecontents*}



% Place the Lua code in a separate external file

begin{filecontents*}{external.lua}

function remove_braced_stuff ( s )

   return ( s:gsub ( "\{.-\}" , "" ) )

end

end{filecontents*}



documentclass{article}

%% Load the Lua function from the external file

directlua{dofile("external.lua")}



%% Two utility LaTeX macros

newcommand{RemoveBracedStuff}{directlua{

  luatexbase.add_to_callback ( "process_input_buffer" , 

    remove_braced_stuff , "removestuff" )}}

newcommand{DontRemoveBracedStuff}{directlua{

  luatexbase.remove_from_callback ( "process_input_buffer" , 

    "removestuff" )}}



begin{document}

RemoveBracedStuff % Enable the Lua function

input cxf % Load the external file



DontRemoveBracedStuff % Disable the Lua function

%% remainder of document

end{document}

share|improve this answer

edited 7 hours ago

answered 10 hours ago

MicoMico

296k3232 gold badges410410 silver badges808808 bronze badges

RequirePackage{filecontents}

%% External file with "{ ... }" material

begin{filecontents*}{cxf.tex}

$abc {...} uvw { int_0^1 } xyz$



abc{ ... }uvw{ int_0^1 }xyz

end{filecontents*}



% Place the Lua code in a separate external file

begin{filecontents*}{external.lua}

function remove_braced_stuff ( s )

   return ( s:gsub ( "\{.-\}" , "" ) )

end

end{filecontents*}



documentclass{article}

%% Load the Lua function from the external file

directlua{dofile("external.lua")}



%% Two utility LaTeX macros

newcommand{RemoveBracedStuff}{directlua{

  luatexbase.add_to_callback ( "process_input_buffer" , 

    remove_braced_stuff , "removestuff" )}}

newcommand{DontRemoveBracedStuff}{directlua{

  luatexbase.remove_from_callback ( "process_input_buffer" , 

    "removestuff" )}}



begin{document}

RemoveBracedStuff % Enable the Lua function

input cxf % Load the external file



DontRemoveBracedStuff % Disable the Lua function

%% remainder of document

end{document}

share|improve this answer

edited 7 hours ago

answered 10 hours ago

MicoMico

296k3232 gold badges410410 silver badges808808 bronze badges

answered 10 hours ago

MicoMico

296k3232 gold badges410410 silver badges808808 bronze badges

answered 10 hours ago

MicoMico

296k3232 gold badges410410 silver badges808808 bronze badges