How can I use the return value of a function in a :set command?

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I want to set an option to a string containing full path of current working directory. For example



set tags=getcwd()."tags" " retrieve the full path of the tags file in current workding directory


However, vim seems only accept expansion for let variables, it don't expand the function in set context.



Is there way to achieve expand things in set?






variables set







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    up vote
    1
    down vote

    favorite












    I want to set an option to a string containing full path of current working directory. For example



    set tags=getcwd()."tags" " retrieve the full path of the tags file in current workding directory


    However, vim seems only accept expansion for let variables, it don't expand the function in set context.



    Is there way to achieve expand things in set?






    variables set







    share|improve this question

























      up vote
      1
      down vote

      favorite









      up vote
      1
      down vote

      favorite











      I want to set an option to a string containing full path of current working directory. For example



      set tags=getcwd()."tags" " retrieve the full path of the tags file in current workding directory


      However, vim seems only accept expansion for let variables, it don't expand the function in set context.



      Is there way to achieve expand things in set?






      variables set







      share|improve this question















      I want to set an option to a string containing full path of current working directory. For example



      set tags=getcwd()."tags" " retrieve the full path of the tags file in current workding directory


      However, vim seems only accept expansion for let variables, it don't expand the function in set context.



      Is there way to achieve expand things in set?






      variables set




      variables set






      share|improve this question















      share|improve this question













      share|improve this question




      share|improve this question








      edited 2 days ago









      Rich

      14.1k11764




      14.1k11764










      asked 2 days ago









      Eric Sun

      82




      82




















          1 Answer
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          You can use :let with Vim options as well, by prefixing the option name with a & sigil; cp. :help :let-option



          let &tags = getcwd().'tags'


          Note that the literal string must be in single quotes (or the backslash doubled); else, the t will expand to a tab character.



          The other way would be by using :execute, but then you'd have to take care of escaping, so this is not recommended:



          execute 'set tags='.escape(getcwd(), ' ').'tags'





          share|improve this answer




















          • Thank you, works perfectly
            – Eric Sun
            2 days ago










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          1 Answer
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          1 Answer
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          active

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          active

          oldest

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          active

          oldest

          votes








          up vote
          8
          down vote



          accepted










          You can use :let with Vim options as well, by prefixing the option name with a & sigil; cp. :help :let-option



          let &tags = getcwd().'tags'


          Note that the literal string must be in single quotes (or the backslash doubled); else, the t will expand to a tab character.



          The other way would be by using :execute, but then you'd have to take care of escaping, so this is not recommended:



          execute 'set tags='.escape(getcwd(), ' ').'tags'





          share|improve this answer




















          • Thank you, works perfectly
            – Eric Sun
            2 days ago














          up vote
          8
          down vote



          accepted










          You can use :let with Vim options as well, by prefixing the option name with a & sigil; cp. :help :let-option



          let &tags = getcwd().'tags'


          Note that the literal string must be in single quotes (or the backslash doubled); else, the t will expand to a tab character.



          The other way would be by using :execute, but then you'd have to take care of escaping, so this is not recommended:



          execute 'set tags='.escape(getcwd(), ' ').'tags'





          share|improve this answer




















          • Thank you, works perfectly
            – Eric Sun
            2 days ago












          up vote
          8
          down vote



          accepted







          up vote
          8
          down vote



          accepted






          You can use :let with Vim options as well, by prefixing the option name with a & sigil; cp. :help :let-option



          let &tags = getcwd().'tags'


          Note that the literal string must be in single quotes (or the backslash doubled); else, the t will expand to a tab character.



          The other way would be by using :execute, but then you'd have to take care of escaping, so this is not recommended:



          execute 'set tags='.escape(getcwd(), ' ').'tags'





          share|improve this answer












          You can use :let with Vim options as well, by prefixing the option name with a & sigil; cp. :help :let-option



          let &tags = getcwd().'tags'


          Note that the literal string must be in single quotes (or the backslash doubled); else, the t will expand to a tab character.



          The other way would be by using :execute, but then you'd have to take care of escaping, so this is not recommended:



          execute 'set tags='.escape(getcwd(), ' ').'tags'






          share|improve this answer












          share|improve this answer



          share|improve this answer










          answered 2 days ago









          Ingo Karkat

          11.5k2538




          11.5k2538











          • Thank you, works perfectly
            – Eric Sun
            2 days ago
















          • Thank you, works perfectly
            – Eric Sun
            2 days ago















          Thank you, works perfectly
          – Eric Sun
          2 days ago




          Thank you, works perfectly
          – Eric Sun
          2 days ago

















           

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