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Trying for infix bash completion

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0

I'm trying to make a bash-completion function that will match infix like this:

candidates: Ay Axy Axx Bx

$ x<tab>

Should suggest Axx Axy Bx.

So far, I've come up with this:

f1 () {

  local cur

  cur=${2:-"."}



  cand="Ay Axy Axx Bx"

  COMPREPLY=( $(compgen -W "${cand}" | grep "$cur") )



  return 0

}

complete -F f1 echo

Which seems to work in case 1:

$ echo x<tab>

Axx  Axy  Bx

But not in case 2:

$ echo y<tab>      # -> readline substitutes with this:

$ echo A<tab><tab> # -> A expands to this:

Axx  Axy  Ay

The difference is that in case 1, there is no common prefix between the two candidates, so readline (I guess) leaves the x alone.
But in case 2, readline substitutes the y with an A, being the longest common prefix between the three matching candidates. Next completion now looks at the A and expands accordingly, thus defeating my purpose of expanding to any candidate with a y infix.

I've looked into the readline settings variables, to see if I can prevent it for replacing the y with A but had no luck.

Does anybody know how to prevent this, or another way to expand via infix? I'm aware that there are libraries like "fuzzy_bash_completion", but I'm trying to learn by doing here.

bash autocomplete

share|improve this question

asked 2 days ago

NoMannNoMann

1322 bronze badges

add a comment | 

0

I'm trying to make a bash-completion function that will match infix like this:

candidates: Ay Axy Axx Bx

$ x<tab>

Should suggest Axx Axy Bx.

So far, I've come up with this:

f1 () {

  local cur

  cur=${2:-"."}



  cand="Ay Axy Axx Bx"

  COMPREPLY=( $(compgen -W "${cand}" | grep "$cur") )



  return 0

}

complete -F f1 echo

Which seems to work in case 1:

$ echo x<tab>

Axx  Axy  Bx

But not in case 2:

$ echo y<tab>      # -> readline substitutes with this:

$ echo A<tab><tab> # -> A expands to this:

Axx  Axy  Ay

The difference is that in case 1, there is no common prefix between the two candidates, so readline (I guess) leaves the x alone.
But in case 2, readline substitutes the y with an A, being the longest common prefix between the three matching candidates. Next completion now looks at the A and expands accordingly, thus defeating my purpose of expanding to any candidate with a y infix.

I've looked into the readline settings variables, to see if I can prevent it for replacing the y with A but had no luck.

Does anybody know how to prevent this, or another way to expand via infix? I'm aware that there are libraries like "fuzzy_bash_completion", but I'm trying to learn by doing here.

bash autocomplete

share|improve this question

asked 2 days ago

NoMannNoMann

1322 bronze badges

add a comment | 

I'm trying to make a bash-completion function that will match infix like this:

candidates: Ay Axy Axx Bx

$ x<tab>

Should suggest Axx Axy Bx.

So far, I've come up with this:

f1 () {

  local cur

  cur=${2:-"."}



  cand="Ay Axy Axx Bx"

  COMPREPLY=( $(compgen -W "${cand}" | grep "$cur") )



  return 0

}

complete -F f1 echo

Which seems to work in case 1:

$ echo x<tab>

Axx  Axy  Bx

But not in case 2:

$ echo y<tab>      # -> readline substitutes with this:

$ echo A<tab><tab> # -> A expands to this:

Axx  Axy  Ay

The difference is that in case 1, there is no common prefix between the two candidates, so readline (I guess) leaves the x alone.
But in case 2, readline substitutes the y with an A, being the longest common prefix between the three matching candidates. Next completion now looks at the A and expands accordingly, thus defeating my purpose of expanding to any candidate with a y infix.

I've looked into the readline settings variables, to see if I can prevent it for replacing the y with A but had no luck.

Does anybody know how to prevent this, or another way to expand via infix? I'm aware that there are libraries like "fuzzy_bash_completion", but I'm trying to learn by doing here.

bash autocomplete

share|improve this question

asked 2 days ago

NoMannNoMann

1322 bronze badges

$ x<tab>

f1 () {

  local cur

  cur=${2:-"."}



  cand="Ay Axy Axx Bx"

  COMPREPLY=( $(compgen -W "${cand}" | grep "$cur") )



  return 0

}

complete -F f1 echo

$ echo x<tab>

Axx  Axy  Bx

$ echo y<tab>      # -> readline substitutes with this:

$ echo A<tab><tab> # -> A expands to this:

Axx  Axy  Ay

share|improve this question

asked 2 days ago

NoMannNoMann

1322 bronze badges

share|improve this question

asked 2 days ago

NoMannNoMann

1322 bronze badges

asked 2 days ago

NoMannNoMann

1322 bronze badges

asked 2 days ago

NoMannNoMann

1322 bronze badges