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Insert external file and modify each line from script

Absolute script-file line-numbers in Vim-function errorsRead file from vimscript variableCurrent VimL script path from inside a functionEnter insert to insert mode from functionHow do I script Vim to download a thesaurus file and save it?Help to implement script that toggle single and double quotesHow to fake a script file name inside a monolithic vimrc?What is a working setup to use Vim plugins UndoTree and Goyo together?Trim/clear new line character from batch script at Windows7 with gvimThe difference between a plugin script and a sourced script

.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty margin-bottom:0;

3

I'm trying to make a function to insert license header from external file on first line in the buffer. The script is:

 fun InsertLicense()
 if filereadable('LICENSE')
 let license = 'LICENSE'
 elseif filereadable('LICENSE.txt')
 let license = 'LICENSE.txt'
 else
 let license = ''
 endif
 if line('$') < 3 && len(license) > 0
 echo 'inserting license from ' . license
 call append(0, readfile(license))
 endif
 endfun

It's working fine except one problem: LICENSE file is a plaintext file, e.g.:

Copyright 2019 OrgName

Permission is hereby granted, free of charge, to any person
obtaining a copy of this software and associated
...

but I need to wrap it as Java multiline comment:

/*
 * Copyright 2019 OrgName
 *
 * Permission is hereby granted, free of charge, to any person
 * obtaining a copy of this software and associated
...
 */

Is it possible to insert * before each line of license file using vim scripting language?

vimscript

share|improve this question

asked Jun 7 at 12:06

g4s8g4s8

1183

New contributor

g4s8 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

add a comment | 

3

I'm trying to make a function to insert license header from external file on first line in the buffer. The script is:

 fun InsertLicense()
 if filereadable('LICENSE')
 let license = 'LICENSE'
 elseif filereadable('LICENSE.txt')
 let license = 'LICENSE.txt'
 else
 let license = ''
 endif
 if line('$') < 3 && len(license) > 0
 echo 'inserting license from ' . license
 call append(0, readfile(license))
 endif
 endfun

It's working fine except one problem: LICENSE file is a plaintext file, e.g.:

Copyright 2019 OrgName

Permission is hereby granted, free of charge, to any person
obtaining a copy of this software and associated
...

but I need to wrap it as Java multiline comment:

/*
 * Copyright 2019 OrgName
 *
 * Permission is hereby granted, free of charge, to any person
 * obtaining a copy of this software and associated
...
 */

Is it possible to insert * before each line of license file using vim scripting language?

vimscript

share|improve this question

asked Jun 7 at 12:06

g4s8g4s8

1183

New contributor

g4s8 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

add a comment | 

I'm trying to make a function to insert license header from external file on first line in the buffer. The script is:

 fun InsertLicense()
 if filereadable('LICENSE')
 let license = 'LICENSE'
 elseif filereadable('LICENSE.txt')
 let license = 'LICENSE.txt'
 else
 let license = ''
 endif
 if line('$') < 3 && len(license) > 0
 echo 'inserting license from ' . license
 call append(0, readfile(license))
 endif
 endfun

It's working fine except one problem: LICENSE file is a plaintext file, e.g.:

Copyright 2019 OrgName

Permission is hereby granted, free of charge, to any person
obtaining a copy of this software and associated
...

but I need to wrap it as Java multiline comment:

/*
 * Copyright 2019 OrgName
 *
 * Permission is hereby granted, free of charge, to any person
 * obtaining a copy of this software and associated
...
 */

Is it possible to insert * before each line of license file using vim scripting language?

vimscript

share|improve this question

asked Jun 7 at 12:06

g4s8g4s8

1183

New contributor

g4s8 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

 fun InsertLicense()
 if filereadable('LICENSE')
 let license = 'LICENSE'
 elseif filereadable('LICENSE.txt')
 let license = 'LICENSE.txt'
 else
 let license = ''
 endif
 if line('$') < 3 && len(license) > 0
 echo 'inserting license from ' . license
 call append(0, readfile(license))
 endif
 endfun

Copyright 2019 OrgName

Permission is hereby granted, free of charge, to any person
obtaining a copy of this software and associated
...

/*
 * Copyright 2019 OrgName
 *
 * Permission is hereby granted, free of charge, to any person
 * obtaining a copy of this software and associated
...
 */

share|improve this question

asked Jun 7 at 12:06

g4s8g4s8

1183

New contributor

g4s8 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 Jun 7 at 12:06

g4s8g4s8

1183

New contributor

g4s8 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

asked Jun 7 at 12:06

g4s8g4s8

1183

New contributor

g4s8 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

asked Jun 7 at 12:06

g4s8g4s8

1183

2 Answers
2

active

oldest

votes

4

readfile() returns a list, each line being in a separate list item.

You can therefore make use of map() to change the list inplace:

let a=map(readfile('LICENSE'), i,v -> '/* ' . v. ' */')

This makes use of lambda expression and wraps a the comment characters /* and */ around it.

Alternatively, you can do this:

 :let a=['/* '] + map(readfile('LICENSE'), i,v -> '* ' . v) + ['*/']

which adds only /* at the start of the file and */ at the end of the file and for each line simply prepends the *.

share|improve this answer

answered Jun 7 at 12:15

Christian BrabandtChristian Brabandt

16.5k2848

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  Damn, it took me 4 more minutes to come up with a much less elegant solution! :)
  
  – statox♦
  Jun 7 at 12:21
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  Upps, Sorry for that ;)
  
  – Christian Brabandt
  Jun 7 at 12:22
  

  
  
  
  

add a comment | 

2

Christian’s answer is great—for java files. But it requires some care for different filetypes.

One alternative would be to lean on the machinery of tpope’s commentary and do something like

" Go comment a paragraph
normal gcap

After you insert the license text.

Note that commentary comments each line individually, which can look less pretty for large chunks of text, but makes uncommenting lines (of code) easier in terms of the plugin code. You may or may not be able to live with this.

share|improve this answer

edited Jun 7 at 16:43

answered Jun 7 at 12:46

D. Ben KnobleD. Ben Knoble

3,2331521

add a comment | 

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4

readfile() returns a list, each line being in a separate list item.

You can therefore make use of map() to change the list inplace:

let a=map(readfile('LICENSE'), i,v -> '/* ' . v. ' */')

This makes use of lambda expression and wraps a the comment characters /* and */ around it.

Alternatively, you can do this:

 :let a=['/* '] + map(readfile('LICENSE'), i,v -> '* ' . v) + ['*/']

which adds only /* at the start of the file and */ at the end of the file and for each line simply prepends the *.

share|improve this answer

answered Jun 7 at 12:15

Christian BrabandtChristian Brabandt

16.5k2848

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  Damn, it took me 4 more minutes to come up with a much less elegant solution! :)
  
  – statox♦
  Jun 7 at 12:21
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  Upps, Sorry for that ;)
  
  – Christian Brabandt
  Jun 7 at 12:22
  

  
  
  
  

add a comment | 

4

readfile() returns a list, each line being in a separate list item.

You can therefore make use of map() to change the list inplace:

let a=map(readfile('LICENSE'), i,v -> '/* ' . v. ' */')

This makes use of lambda expression and wraps a the comment characters /* and */ around it.

Alternatively, you can do this:

 :let a=['/* '] + map(readfile('LICENSE'), i,v -> '* ' . v) + ['*/']

which adds only /* at the start of the file and */ at the end of the file and for each line simply prepends the *.

share|improve this answer

answered Jun 7 at 12:15

Christian BrabandtChristian Brabandt

16.5k2848

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  Damn, it took me 4 more minutes to come up with a much less elegant solution! :)
  
  – statox♦
  Jun 7 at 12:21
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  Upps, Sorry for that ;)
  
  – Christian Brabandt
  Jun 7 at 12:22
  

  
  
  
  

add a comment | 

readfile() returns a list, each line being in a separate list item.

You can therefore make use of map() to change the list inplace:

let a=map(readfile('LICENSE'), i,v -> '/* ' . v. ' */')

This makes use of lambda expression and wraps a the comment characters /* and */ around it.

Alternatively, you can do this:

 :let a=['/* '] + map(readfile('LICENSE'), i,v -> '* ' . v) + ['*/']

which adds only /* at the start of the file and */ at the end of the file and for each line simply prepends the *.

share|improve this answer

answered Jun 7 at 12:15

Christian BrabandtChristian Brabandt

16.5k2848

let a=map(readfile('LICENSE'), i,v -> '/* ' . v. ' */')

 :let a=['/* '] + map(readfile('LICENSE'), i,v -> '* ' . v) + ['*/']

share|improve this answer

answered Jun 7 at 12:15

Christian BrabandtChristian Brabandt

16.5k2848

answered Jun 7 at 12:15

Christian BrabandtChristian Brabandt

16.5k2848

answered Jun 7 at 12:15

Christian BrabandtChristian Brabandt

16.5k2848

2

Christian’s answer is great—for java files. But it requires some care for different filetypes.

One alternative would be to lean on the machinery of tpope’s commentary and do something like

" Go comment a paragraph
normal gcap

After you insert the license text.

Note that commentary comments each line individually, which can look less pretty for large chunks of text, but makes uncommenting lines (of code) easier in terms of the plugin code. You may or may not be able to live with this.

share|improve this answer

edited Jun 7 at 16:43

answered Jun 7 at 12:46

D. Ben KnobleD. Ben Knoble

3,2331521

add a comment | 

2

Christian’s answer is great—for java files. But it requires some care for different filetypes.

One alternative would be to lean on the machinery of tpope’s commentary and do something like

" Go comment a paragraph
normal gcap

After you insert the license text.

Note that commentary comments each line individually, which can look less pretty for large chunks of text, but makes uncommenting lines (of code) easier in terms of the plugin code. You may or may not be able to live with this.

share|improve this answer

edited Jun 7 at 16:43

answered Jun 7 at 12:46

D. Ben KnobleD. Ben Knoble

3,2331521

add a comment | 

Christian’s answer is great—for java files. But it requires some care for different filetypes.

One alternative would be to lean on the machinery of tpope’s commentary and do something like

" Go comment a paragraph
normal gcap

After you insert the license text.

Note that commentary comments each line individually, which can look less pretty for large chunks of text, but makes uncommenting lines (of code) easier in terms of the plugin code. You may or may not be able to live with this.

share|improve this answer

edited Jun 7 at 16:43

answered Jun 7 at 12:46

D. Ben KnobleD. Ben Knoble

3,2331521

" Go comment a paragraph
normal gcap

share|improve this answer

edited Jun 7 at 16:43

answered Jun 7 at 12:46

D. Ben KnobleD. Ben Knoble

3,2331521

answered Jun 7 at 12:46

D. Ben KnobleD. Ben Knoble

3,2331521

answered Jun 7 at 12:46

D. Ben KnobleD. Ben Knoble

3,2331521