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

up vote
1
down vote

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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?

edited Nov 16 at 11:43

Rich

14.2k11764

asked Nov 16 at 7:42

Eric Sun

132

add a comment |

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?

edited Nov 16 at 11:43

Rich

14.2k11764

asked Nov 16 at 7:42

Eric Sun

132

add a comment |

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?

edited Nov 16 at 11:43

Rich

14.2k11764

asked Nov 16 at 7:42

Eric Sun

132

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

edited Nov 16 at 11:43

Rich

14.2k11764

asked Nov 16 at 7:42

Eric Sun

132

edited Nov 16 at 11:43

Rich

14.2k11764

asked Nov 16 at 7:42

Eric Sun

132

edited Nov 16 at 11:43

Rich

14.2k11764

edited Nov 16 at 11:43

Rich

14.2k11764

edited Nov 16 at 11:43

Rich

14.2k11764

asked Nov 16 at 7:42

Eric Sun

132

asked Nov 16 at 7:42

Eric Sun

132

asked Nov 16 at 7:42

Eric Sun

132

add a comment |

1 Answer
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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'

answered Nov 16 at 8:32

Ingo Karkat

11.6k2538

Thank you, works perfectly
– Eric Sun
Nov 16 at 13:13

add a comment |

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1 Answer
1

active

oldest

votes

1 Answer
1

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'

answered Nov 16 at 8:32

Ingo Karkat

11.6k2538

Thank you, works perfectly
– Eric Sun
Nov 16 at 13:13

add a comment |

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'

answered Nov 16 at 8:32

Ingo Karkat

11.6k2538

Thank you, works perfectly
– Eric Sun
Nov 16 at 13:13

add a comment |

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'

answered Nov 16 at 8:32

Ingo Karkat

11.6k2538

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'

answered Nov 16 at 8:32

Ingo Karkat

11.6k2538

answered Nov 16 at 8:32

Ingo Karkat

11.6k2538

answered Nov 16 at 8:32

Ingo Karkat

11.6k2538

answered Nov 16 at 8:32

Ingo Karkat

11.6k2538

Thank you, works perfectly
– Eric Sun
Nov 16 at 13:13

add a comment |

Thank you, works perfectly
– Eric Sun
Nov 16 at 13:13

Thank you, works perfectly
– Eric Sun
Nov 16 at 13:13

add a comment |

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