D01prompt.ztst   [plain text]


%prep

  mkdir prompt.tmp
  cd prompt.tmp
  mydir=$PWD
  SHLVL=2
  setopt extendedglob

%test

  hash -d mydir=$mydir
  print -P '  %%%):  %)
  %%~:  %~
  %%d:  %d
  %%1/: %1/
  %%h:  %h
  %%L:  %L
  %%M:  %M
  %%m:  %m
  %%n:  %n
  %%N:  %N
  %%i:  %i
  a%%{...%%}b:  a%{%}b
  '
0q:Basic prompt escapes as shown.
>  %):  )
>  %~:  ~mydir
>  %d:  $mydir
>  %1/: ${mydir:t}
>  %h:  0
>  %L:  2
>  %M:  $HOST
>  %m:  ${HOST%%.*}
>  %n:  $USERNAME
>  %N:  (eval)
>  %i:  2
>  a%{...%}b:  ab
>  

  true
  print -P '%?'
  false
  print -P '%?'
0:`%?' prompt escape
>0
>1

  PS4="%_> "
  setopt xtrace
  if true; then true; else false; fi
  unsetopt xtrace
0:`%_' prompt escape
?if> true
?then> true
?> unsetopt xtrace

  diff =(print -P '%#') =(print -P '%(!.#.%%)')
0:`%#' prompt escape and its equivalent

  psvar=(caesar adsum jam forte)
  print -P '%v' '%4v'
0:`%v' prompt escape
>caesar forte

  true
  print -P '%(?.true.false)'
  false
  print -P '%(?.true.false)'
0:ternary prompt escapes
>true
>false

  print -P 'start %10<...<truncated at 10%<< Not truncated%3< ...<Not shown'
  print -P 'start %10>...>truncated at 10%>> Not truncated%3> ...>Not shown'
0:prompt truncation
>start ...d at 10 Not truncated ...
>start truncat... Not truncated ...

# It's hard to check the time and date as they are moving targets.
# We therefore just check that various forms of the date are consistent.
# In fact, if you perform this at midnight it can still fail.
# We could test for that, but we can't be bothered.
# I hope LC_ALL is enough to make the format what's expected.

  LC_ALL=C
  date1=$(print -P %w)
  date2=$(print -P %W)
  date3=$(print -P %D)
  if [[ $date1 != [A-Z][a-z][a-z][[:blank:]]##[0-9]## ]]; then
    print "Date \`$date1' is not in the form \`Day DD' (e.g. \`Mon 1'"
  fi
  if [[ $date2 != [0-9][0-9]/[0-9][0-9]/[0-9][0-9] ]]; then
    print "Date \`$date2' is not in the form \`DD/MM/YYYY'"
  fi
  if [[ $date3 != [0-9][0-9]-[0-9][0-9]-[0-9][0-9] ]]; then
    print "Date \`$date3' is not in the form \`YY-MM-DD'"
  fi
  if (( $date1[5,-1] != $date2[4,5] )) || (( $date2[4,5] != $date3[7,8] ))
  then
    print "Days of month do not agree in $date1, $date2, $date3"
  fi
  if (( $date2[1,2] != $date3[4,5] )); then
    print "Months do not agree in $date2, $date3"
  fi
  if (( $date2[7,8] != $date3[1,2] )); then
    print "Years do not agree in $date2, $date3"
  fi
0:Dates produced by prompt escapes

  mkdir foo
  mkdir foo/bar
  mkdir foo/bar/rod
  (zsh_directory_name() {
    emulate -L zsh
    setopt extendedglob
    local -a match mbegin mend
    if [[ $1 = d ]]; then
      if [[ $2 = (#b)(*bar)/rod ]]; then
        reply=(barmy ${#match[1]})
      else
        return 1
      fi
    else
      if [[ $2 = barmy ]]; then
        reply=($mydir/foo/bar)
      else
        return 1
      fi
    fi
  }
  # success
  print ~[barmy]/anything
  cd foo/bar/rod
  print -P %~
  # failure
  setopt nonomatch
  print ~[scuzzy]/rubbish
  cd ../..
  print -P %~
  # catastrophic failure
  unsetopt nonomatch
  print ~[scuzzy]/rubbish
  )
1q:Dynamic named directories
>$mydir/foo/bar/anything
>~[barmy]/rod
>~[scuzzy]/rubbish
>~mydir/foo
?(eval):33: no directory expansion: ~[scuzzy]

  (
  zsh_directory_name() {
  emulate -L zsh
  setopt extendedglob
  local -a match mbegin mend
  if [[ $1 = n ]]; then
      if [[ $2 = *:l ]]; then
	  reply=(${2%%:l}/very_long_directory_name)
	  return 0
      else
	  return 1
      fi
  else
      if [[ $2 = (#b)(*)/very_long_directory_name ]]; then
	reply=(${match[1]}:l ${#2})
	return 0
      else
	return 1
      fi
  fi
  }
  parent=$PWD
  dir=$parent/very_long_directory_name
  mkdir $dir
  cd $dir
  fn() {
     PS4='+%N:%i> '
     setopt localoptions xtrace
     # The following is the key to the test.
     # It invokes zsh_directory_name which does PS4 output stuff
     # while we're doing prompt handling for the parameter
     # substitution.  This checks recursion works OK.
     local d=${(%):-%~}
     print ${d//$parent/\<parent\>}
  }
  fn 2>stderr
  # post process error to remove variable contents
  while read line; do
    # tricky: reply is set to include directory length which is variable
    [[ $line = *reply* ]] && continue
    print ${line//$parent/\<parent\>}
  done <stderr >&2
  )
0:Recursive use of prompts
>~[<parent>:l]
?+zsh_directory_name:1> emulate -L zsh
?+zsh_directory_name:2> setopt extendedglob
?+zsh_directory_name:3> local -a match mbegin mend
?+zsh_directory_name:4> [[ d == n ]]
?+zsh_directory_name:12> [[ <parent>/very_long_directory_name == (#b)(*)/very_long_directory_name ]]
?+zsh_directory_name:14> return 0
?+fn:7> local 'd=~[<parent>:l]'
?+fn:8> print '~[<parent>:l]'