.zsh/functions/prompt_ganneff_setup

   1 # -*- mode:sh -*-
   2
   3 # This prompt is based on work of other people.
   4 #
   5 # The prompt itself is based on various others:
   6 #   - The "design" is taken from Phil!'s ZSH prompt, as found on
   7 #     http://aperiodic.net/phil/prompt/
   8 #
   9 #   - The tech using zstyle is inspired by the prompt as used by
  10 #     the grml-live system <http://grml.org>, see
  11 #     http://git.grml.org/?p=grml-etc-core.git;a=summary for details
  12 #     on theirs.
  13 #     A good number of their support functions are also taken, though
  14 #     they got renamed from grml_* to ganneff_* to have a single namespace
  15 #     here.
  16 #
  17 #   - The winch function as seen in the prompt theme "bart", delivered
  18 #     with zsh
  19
  20 prompt_ganneff_help () {
  21     cat <<__EOF0__
  22   prompt ganneff
  23
  24     This is the prompt as used by (who would have guessed) Ganneff.  By
  25     default it is a two-line prompt.  You can find its latest version at
  26     http://git.ganneff.de/cgi-bin/gitweb.cgi?p=zsh.git;a=summary
  27
  28     The prompt itself is based on various others:
  29       - The "design" is taken from Phil!'s ZSH prompt, as found on
  30         http://aperiodic.net/phil/prompt/
  31
  32       - The technic using zstyle is inspired by the prompt as used by
  33         the grml-live system <http://grml.org>, see
  34         http://git.grml.org/?p=grml-etc-core.git;a=summary for details
  35         on theirs.
  36
  37     The prompt integrates with zsh's prompt themes system and uses the
  38     zstyle system for its configuration. It is configurable as much as
  39     seems to make sense. In particular, these aspects are customisable:
  40
  41         - The items used in the prompt and their order (e.g. you can
  42           remove \`user' from the list of activated items, which will
  43           cause the user name to be omitted from the prompt string).
  44
  45         - The attributes used with the items are customisable via strings
  46           used before and after the actual item.
  47
  48         - An itemset for "small terminals" can be provided. That is, if the
  49           length of the upper line exceeds the terminal width, various
  50           items get removed from the prompt to (hopefully) make it still
  51           look good. Obviously this only works down to a limit.
  52
  53     The available items are: at, battery, change-root, date, history,
  54     host, jobs, newline, path, percent, rc, rc-always, shell-level,
  55     time, user, vcs, ulcorner, llcorner, urcorner, lrcorner, line, pts,
  56     openbracket, closebracket, pipe, space, flexline
  57
  58     Most of those should be self-explanatory, some may need more:
  59      line     - Draws a single line character
  60      XYcorner - Draws a corner. The chars to replace XY are
  61                 X=u for upper, l for lower
  62                 Y=l for left, r for right
  63      flexline - Same as line, but flexible length to fill remaining space
  64                 Only works in a two-line prompt in the upper line, that
  65                 is, a newline MUST appear in the setup!
  66
  67     Should they not fit your need, there is an easy way to have the
  68     prompt include basically anything you want. Just define your own
  69     items. For that you simply define them inside the
  70     ':prompt:ganneff:extra:' namespace.
  71
  72     Example: To have the prompt include the value of the variable
  73     \$FOOBAR, in red and have the variable updated by the function
  74     jj_foobar, use the following:
  75
  76        zstyle ':prompt:ganneff:extra:foobar' pre '${PR_RED}'
  77        zstyle ':prompt:ganneff:extra:foobar' post '${PR_NO_COLOR}'
  78        zstyle ':prompt:ganneff:extra:foobar' token '$FOOBAR'
  79        zstyle ':prompt:ganneff:extra:foobar' precmd jj_foobar
  80
  81     Now you can add the token \`foobar' to the list of items and voila,
  82     your own stuff appears.
  83
  84     Note that the function part only works in zsh 4.3.5 or later (I've
  85     been to lazy to replace add-zsh-hook with something for the older
  86     versions).
  87
  88
  89     The configuration of the predefined items can also be changed using
  90     zsh's \`zstyle' mechanism. The context, that is used while looking
  91     up styles is:
  92
  93         ':prompt:ganneff:<left-or-right>:<full-or-small>:<subcontext>'
  94
  95     Here <left-or-right> is either \`left' or \`right', signifying
  96     whether the style should affect the left or the right prompt.
  97
  98     <full-or-small> is either \`full' or \`small' and only valid in the
  99     item selection, signifying wether the item list should affect the
 100     full length or the "small terminal" prompt. As "small terminal"
 101     prompt does not display the right side prompt, <full-or-small> has
 102     no effect on the right side prompt.
 103
 104     <subcontext> is either \`setup' or 'items:<item>', where \`<item>'
 105     is one of the available items.
 106
 107     The styles/settings available under ':prompt:ganneff:':
 108
 109         - vcs_info (boolean): If \`true' (the default), use \`vcs_info'.
 110
 111         - set_vcs_info_defaults (boolean): If \`true' (the default),
 112           various vcs_info settings will be done. If unset or \`false'
 113           it is assumed that the user has already done this.
 114
 115           The default setup is:
 116             zstyle ':vcs_info:*' max-exports 1
 117             zstyle ':vcs_info:*' use-prompt-escapes
 118             zstyle ':vcs_info:*' use_simple
 119             zstyle ':vcs_info:*' stagedstr      "!"
 120             zstyle ':vcs_info:*' unstagedstr    "?"
 121             zstyle ':vcs_info:*' check-for-changes true
 122             zstyle ':vcs_info:(sv[nk]|bzr):*' branchformat \
 123                       "\${PR_YELLOW}%b%{\${PR_RED}%}:\${PR_YELLOW}%r\${PR_NO_COLOR}"
 124             zstyle ':vcs_info:*' formats \
 125                       "(\${PR_YELLOW}%s\${PR_NO_COLOR})-[\${PR_GREEN}%b\${PR_NO_COLOR}]%m%u%c "
 126             zstyle ':vcs_info:*' actionformats \
 127                       "(\${PR_YELLOW}%s\${PR_NO_COLOR})-[\${PR_GREEN}%b\${PR_NO_COLOR}-\${PR_RED}(%a)\${PR_NO_COLOR}]%m%u%c "
 128
 129         - colors (boolean): If \`true' (the default), use colors. b/w
 130           otherwise.
 131
 132         - nicelines (boolean): If \`true' (the default), use special
 133           magic to draw nice lines and corners. Might not work on every
 134           terminal. If false, draws using plain ascii characters.
 135           Linux console also seems to identify itself as if it could,
 136           but then doesn't do drawing right (not in our way at least).
 137
 138         - battery (string): If \`none' then no battery function at all.
 139           If either \`ibam' or \`acpi' then use those tools to gather
 140           the current battery level.
 141
 142         - use-rprompt (boolean): If \`true' (the default), print the
 143           right side prompt.
 144
 145         - items (list): The list of items used in the prompt. If \`vcs' is
 146           present in the list, the theme's code invokes \`vcs_info'
 147           accordingly. Default (left): rc change-root user at host path vcs
 148           percent; Default (right): sad-smiley
 149
 150     Note that both, nicelines and colors are forced to false in case the
 151     TERM variable is set to dumb.
 152
 153     Available styles in 'items:<item>' are: pre, post, token and precmd.
 154     Pre and Post are strings that are inserted before (pre) and after
 155     (post) the item in question. Token is the token itself that gets
 156     inserted into PS1. Thus, the following would cause the
 157     user name to be printed in red instead of the default blue:
 158
 159         zstyle ':prompt:ganneff:*:items:user' pre '\${PR_RED}'
 160
 161     and
 162
 163         zstyle ':prompt:ganneff:*:items:date' token '%D{%Y-%m-%d [d:%j/w:%V]}'
 164
 165     will output a very different date token compared with the default
 166     definition of '%D{%Y-%m-%d}'.
 167
 168     Note, that in the above example the \`post' style may remain at its
 169     default value, because its default value is '\${PR_NO_COLOR}', which
 170     turns the foreground text attribute off (which is exactly, what is
 171     still required with the new \`pre' value).
 172
 173     Possible values for the colors: \${PR_XXX} and \${PR_BOLD_XXX} with
 174     XXX replaced with one of: RED GREEN YELLOW BLUE MAGENTA CYAN WHITE BLACK.
 175     \${PR_NO_COLOR} resets color.
 176     Using the \${PR_XXX} values instead of zsh's internal \%F{xxx} allows
 177     the usage of the colors style to turn of prompt colors easily.
 178
 179     Last note: You really want to have "setopt promptsubst", otherwise you
 180     won't like this prompt.
 181 __EOF0__
 182 }
 183
 184 prompt_ganneff_setup () {
 185     emulate -L zsh
 186     setopt nolocaltraps
 187
 188     # We forcefully overwrite colors and nicelines setting for a dumb
 189     # terminal.
 190     if [[ "$TERM" == "dumb" ]]; then
 191         zstyle ':prompt:ganneff' colors false
 192         zstyle ':prompt:ganneff' nicelines false
 193     fi
 194
 195     # See if we can and should use extended characters to look nicer.
 196     if zstyle -t ':prompt:ganneff' nicelines; then
 197         typeset -A altchar
 198         set -A altchar ${(s..)terminfo[acsc]}
 199         # Some stuff to help us draw nice lines
 200         PR_SET_CHARSET="%{$terminfo[enacs]%}"
 201         PR_SHIFT_IN="%{$terminfo[smacs]%}"
 202         PR_SHIFT_OUT="%{$terminfo[rmacs]%}"
 203         PR_HBAR=${altchar[q]:--}
 204         PR_ULCORNER=${altchar[l]:--}
 205         PR_LLCORNER=${altchar[m]:--}
 206         PR_LRCORNER=${altchar[j]:--}
 207         PR_URCORNER=${altchar[k]:--}
 208     else
 209         PR_SET_CHARSET=""
 210         PR_SHIFT_IN=""
 211         PR_SHIFT_OUT=""
 212         PR_HBAR="-"
 213         PR_ULCORNER=""
 214         PR_LLCORNER=""
 215         PR_LRCORNER=""
 216         PR_URCORNER=""
 217     fi
 218
 219     if zstyle -t ':prompt:ganneff' colors; then
 220         if [[ -n "${BLUE}" ]] && [[ -n "${YELLOW}" ]]; then
 221             # Two defined, so we assume someone already defined themself
 222             # the colors. We just use them and not setup our own.
 223             for color in RED GREEN YELLOW BLUE MAGENTA CYAN WHITE BLACK GREY; do
 224                 eval PR_$color='%{${(P)color}%}'
 225                 eval PR_BOLD_$color='%{$terminfo[bold]${(LP)color}%}'
 226             done
 227             PR_NO_COLOR="%{${reset_color}%}"
 228         else
 229             # Seems like colors are not defined, so set them up
 230             # This duplicates docolors from 01_Terminfo.zsh, but is here to have
 231             # prompt_ganneff_setup not require anything else from my dotfiles
 232             if autoload -Uz colors && colors 2>/dev/null ; then
 233                 for COLOR in RED GREEN YELLOW BLUE MAGENTA CYAN WHITE BLACK GREY; do
 234                     eval PR_$COLOR='%{$fg_no_bold[${(L)COLOR}]%}'
 235                     eval PR_BOLD_$COLOR='%{$fg_bold[${(L)COLOR}]%}'
 236                 done
 237                 eval PR_NO_COLOR='%{$reset_color%}'
 238             else
 239                 PR_BLUE=$'%{\e[1;34m%}'
 240                 PR_RED=$'%{\e[1;31m%}'
 241                 PR_GREEN=$'%{\e[1;32m%}'
 242                 PR_CYAN=$'%{\e[1;36m%}'
 243                 PR_WHITE=$'%{\e[1;37m%}'
 244                 PR_MAGENTA=$'%{\e[1;35m%}'
 245                 PR_YELLOW=$'%{\e[1;33m%}'
 246                 PR_NO_COLOR=$'%{\e[0m%}'
 247             fi
 248         fi
 249     else
 250         PR_BLUE=''
 251         PR_RED=''
 252         PR_GREEN=''
 253         PR_CYAN=''
 254         PR_WHITE=''
 255         PR_MAGENTA=''
 256         PR_YELLOW=''
 257         PR_NO_COLOR="%{${reset_color}%}"
 258     fi
 259
 260     # Easy things first.
 261     # The secondary prompt, printed when the shell needs more
 262     # information to complete a command. %_ displays any shell constructs
 263     # or quotation marks which are currently being processed.
 264     if zstyle -t ':prompt:ganneff' nicelines; then
 265         PS2='${PR_CYAN}${PR_SHIFT_IN}${PR_HBAR}${PR_BLUE}${PR_HBAR}${PR_SHIFT_OUT}\
 266 (${PR_GREEN}%_${PR_BLUE})\
 267 ${PR_SHIFT_IN}${PR_HBAR}${PR_CYAN}${PR_HBAR}${PR_SHIFT_OUT}${PR_NO_COLOR} '
 268     else
 269         PS2='-(%_)- '
 270     fi
 271     # selection prompt used within a select loop.
 272     PS3='?# '
 273     # the execution trace prompt (setopt xtrace). default: '+%N:%i>'
 274     PS4='+%N:%i:%_> '
 275
 276     if zstyle -t ':prompt:ganneff' vcs_info && \
 277         is439 && autoload -Uz vcs_info && vcs_info; then
 278         if zstyle -t ':prompt:ganneff' set_vcs_info_defaults; then
 279             # gather version control information for inclusion in a prompt
 280             # we will only be using one variable, so let the code know now.
 281             zstyle ':vcs_info:*' max-exports 1
 282             zstyle ':vcs_info:*' use-prompt-escapes
 283             zstyle ':vcs_info:*' use_simple
 284             zstyle ':vcs_info:*' stagedstr      "!"
 285             zstyle ':vcs_info:*' unstagedstr    "?"
 286             zstyle ':vcs_info:*' check-for-changes true
 287
 288             # change vcs_info formats for the prompt
 289             zstyle ':vcs_info:(sv[nk]|bzr):*' branchformat "${PR_YELLOW}%b%{${PR_RED}%}:${PR_YELLOW}%r${PR_NO_COLOR}"
 290             zstyle ':vcs_info:*' formats "(${PR_YELLOW}%s${PR_NO_COLOR})-[${PR_GREEN}%b${PR_NO_COLOR}]%m%u%c "
 291             zstyle ':vcs_info:*' actionformats "(${PR_YELLOW}%s${PR_NO_COLOR})-[${PR_GREEN}%b${PR_NO_COLOR}-${PR_RED}(%a)${PR_NO_COLOR}]%m%u%c "
 292         fi
 293     fi
 294
 295     # These maps define default tokens and pre-/post-decoration for items to be
 296     # used within the themes. All defaults may be customised in a context sensitive
 297     # matter by using zsh's `zstyle' mechanism.
 298     typeset -gA ganneff_prompt_pre_default \
 299         ganneff_prompt_post_default \
 300         ganneff_prompt_token_default
 301
 302     ganneff_prompt_pre_default=(
 303         at                 ''
 304         battery            ' '
 305         change-root        ''
 306         date               '${PR_BLUE}'
 307         history            '${PR_GREEN}'
 308         host               '${PR_RED}'
 309         jobs               '${PR_CYAN}'
 310         newline            ''
 311         path               '${PR_MAGENTA}'
 312         percent            ''
 313         rc                 '${PR_RED}'
 314         rc-always          ''
 315         shell-level        '${PR_RED}'
 316         time               '${PR_BLUE}'
 317         user               '${PR_BLUE}'
 318         vcs                ''
 319         ulcorner           '${PR_SHIFT_IN}'
 320         llcorner           '${PR_SHIFT_IN}'
 321         urcorner           '${PR_SHIFT_IN}'
 322         lrcorner           '${PR_SHIFT_IN}'
 323         line               '${PR_SHIFT_IN}'
 324         pts                ''
 325         privileges         ''
 326         openparentheses    ''
 327         closeparentheses   ''
 328         openbracket        ''
 329         closebracket       ''
 330         openbraces         ''
 331         closebraces        ''
 332         openanglebracket   ''
 333         closeanglebracket  ''
 334         pipe               ''
 335         space              ''
 336         colon              ''
 337         flexline           '${PR_SHIFT_IN}'
 338     )
 339
 340
 341     ganneff_prompt_post_default=(
 342         at                ''
 343         battery           ''
 344         change-root       ''
 345         date              '${PR_NO_COLOR}'
 346         history           '${PR_NO_COLOR}'
 347         host              '${PR_NO_COLOR}'
 348         jobs              '${PR_NO_COLOR}'
 349         newline           ''
 350         path              '${PR_NO_COLOR}'
 351         percent           ''
 352         rc                '${PR_NO_COLOR}'
 353         rc-always         ''
 354         shell-level       '${PR_NO_COLOR}'
 355         time              '${PR_NO_COLOR}'
 356         user              '${PR_NO_COLOR}'
 357         vcs               ''
 358         ulcorner          '${PR_SHIFT_OUT}'
 359         llcorner          '${PR_SHIFT_OUT}'
 360         urcorner          '${PR_SHIFT_OUT}'
 361         lrcorner          '${PR_SHIFT_OUT}'
 362         line              '${PR_SHIFT_OUT}'
 363         pts               ''
 364         privileges        ''
 365         openparentheses   ''
 366         closeparentheses  ''
 367         openbracket       ''
 368         closebracket      ''
 369         openbraces        ''
 370         closebraces       ''
 371         openanglebracket  ''
 372         closeanglebracket ''
 373         pipe              ''
 374         space             ''
 375         colon             ''
 376         flexline          '${PR_SHIFT_OUT}'
 377     )
 378
 379     ganneff_prompt_token_default=(
 380         at                '@'
 381         battery           'PERCENT'
 382         change-root       'debian_chroot'
 383         date              '%D{%Y-%m-%d}'
 384         history           '{#%!}'
 385         host              '%m'
 386         jobs              '[%j running job(s)] '
 387         newline           $'\n'
 388         path              '%40<..<%~%<<'
 389         percent           '% # '
 390         rc                '%(?..%? )'
 391         rc-always         '%?'
 392         shell-level       '%(2L.%L.)'
 393         time              '%D{%H:%M:%S}'
 394         user              '%n'
 395         vcs               '0'
 396         ulcorner          '${PR_ULCORNER}'
 397         llcorner          '${PR_LLCORNER}'
 398         urcorner          '${PR_URCORNER}'
 399         lrcorner          '${PR_LRCORNER}'
 400         line              '${PR_HBAR}'
 401         pts               '%y'
 402         privileges        '%#'
 403         openparentheses   '('
 404         closeparentheses  ')'
 405         openbracket       '['
 406         closebracket      ']'
 407         openbraces        '{'
 408         closebraces       '}'
 409         openanglebracket  '<'
 410         closeanglebracket '>'
 411         pipe              '|'
 412         space             ' '
 413         colon             ':'
 414         flexline          'PR_FLEXLINE'
 415     )
 416
 417     PR_FLEXLINE=""
 418     add-zsh-hook precmd prompt_ganneff_precmd
 419     # Call the winch function once to ensure the length gets calculated
 420     # correctly
 421     prompt_ganneff_winch
 422     local pr_battery
 423     zstyle -s ':prompt:ganneff' battery pr_battery
 424     if [[ $pr_battery != "none" ]]; then
 425         add-zsh-hook precmd prompt_ganneff_battery
 426         prompt_ganneff_battery
 427     fi
 428
 429     functions[TRAPWINCH]="${functions[TRAPWINCH]//prompt_ganneff_winch}
 430         prompt_ganneff_winch"
 431 }
 432
 433 prompt_ganneff_precmd () {
 434     emulate -L zsh
 435     setopt nolocaltraps
 436
 437     zstyle -t ':prompt:ganneff' vcs_info && vcs_info
 438     local -a left_items right_items
 439     left_items=(ulcorner line openbracket user at host pts closebracket line history flexline
 440                          openbracket path closebracket line urcorner newline
 441                 llcorner line rc openbracket time closebracket line vcs line change-root pipe space)
 442     PR_PS1=""; nomore=0
 443     ganneff_prompt_addto PS1 full "${left_items[@]}"
 444     if zstyle -T ":prompt:ganneff:right:setup" use-rprompt; then
 445         right_items=(space pipe line openbracket date closebracket line lrcorner)
 446         ganneff_prompt_addto RPS1 full "${right_items[@]}"
 447     fi
 448
 449     # Now a kind-of-hack to reduce the prompt when we run out of space.
 450     promptsize=${#PR_PS1}
 451     if [[ ${promptsize} -lt ${TERMWIDTH} ]]; then
 452         # the q here should be ${PR_HBAR}, but for some reason zsh didn't like me,
 453         # so meh
 454         if zstyle -t ':prompt:ganneff' nicelines && [[ "$TERM" != dumb ]] \
 455             && [[ "$TERM" != "linux" ]]; then
 456             PR_FLEXLINE="${(l.(($TERMWIDTH - $promptsize ))..q.)}"
 457         else
 458             PR_FLEXLINE="${(l.(($TERMWIDTH - $promptsize ))..-.)}"
 459         fi
 460     else
 461         # Small size prompt is needed
 462         left_items=(ulcorner line openbracket user at host closebracket line openbracket path closebracket newline
 463             llcorner line rc openbracket time closebracket line vcs line pipe space)
 464         ganneff_prompt_addto PS1 small "${left_items[@]}"
 465         # And with a small prompt, we don't show the right size at all.
 466         RPS1=""
 467     fi
 468 }
 469
 470 prompt_ganneff_length () {
 471     (( TERMWIDTH = ${COLUMNS} - 1 ))
 472 }
 473
 474 prompt_ganneff_winch () {
 475     emulate -L zsh
 476     setopt nolocaltraps noksharrays unset
 477
 478     # Delete ourself from TRAPWINCH if not using our precmd insert.
 479     [[ $precmd_functions = *prompt_ganneff_precmd* ]] && prompt_ganneff_length ||
 480         functions[TRAPWINCH]="${functions[TRAPWINCH]//prompt_ganneff_winch}"
 481 }
 482
 483 ganneff_typeset_and_wrap () {
 484     emulate -L zsh
 485     local target="$1"
 486     local new="$2"
 487     local left="$3"
 488     local right="$4"
 489
 490     if (( ${+parameters[$new]} )); then
 491         typeset -g "${target}=${(P)target}${left}${(P)new}${right}"
 492     fi
 493 }
 494
 495 ganneff_prompt_addto () {
 496     emulate -L zsh
 497     local target="$1"
 498     local size="$2"
 499     local lr it apre apost new v prefunc
 500     local -a items
 501     shift
 502     shift
 503
 504     [[ $target == PS1 ]] && lr=left || lr=right
 505     zstyle -a ":prompt:ganneff:${lr}:${size}:setup" items items || items=( "$@" )
 506     typeset -g "${target}="
 507     for it in "${items[@]}"; do
 508         zstyle -s ":prompt:ganneff:${lr}:items:$it" pre apre \
 509             || zstyle -s ":prompt:ganneff:extra:$it" pre apre \
 510             || apre=${ganneff_prompt_pre_default[$it]}
 511         zstyle -s ":prompt:ganneff:${lr}:items:$it" post apost \
 512             || zstyle -s ":prompt:ganneff:extra:$it" post apost \
 513             || apost=${ganneff_prompt_post_default[$it]}
 514         zstyle -s ":prompt:ganneff:${lr}:items:$it" token new \
 515             || zstyle -s ":prompt:ganneff:extra:$it" token new \
 516             || new=${ganneff_prompt_token_default[$it]}
 517
 518         # Now check if there is the wish for a precmd function and if so,
 519         # run it
 520         zstyle -s ":prompt:ganneff:extra:$it" precmd prefunc
 521         if [[ -n "${prefunc}" ]]; then
 522             ${prefunc} || true
 523         fi
 524
 525         typeset -g "${target}=${(P)target}${apre}"
 526         # Store the expanded value in PR_PS1, as we use that for length calculations
 527         [[ $it == "newline" ]] && nomore=1
 528         if [[ $nomore -eq 0 ]] && [[ $it != "flexline" ]] &&  PR_PS1+=${(e%)new}
 529         case $it in
 530             battery)
 531                 ganneff_typeset_and_wrap $target $new '' ''
 532                 ;;
 533             change-root)
 534                 ganneff_typeset_and_wrap $target $new '(' ')'
 535                 ;;
 536             flexline)
 537                 typeset -g "${target}=${(P)target}\${${new}}"
 538                 ;;
 539             ganneff-chroot)
 540                 if [[ -n ${(P)new} ]]; then
 541                     typeset -g "${target}=${(P)target}(CHROOT)"
 542                 fi
 543                 ;;
 544             vcs)
 545                 v="vcs_info_msg_${new}_"
 546                 if (( ${+parameters[$v]} )) && [[ -n "${(P)v}" ]]; then
 547                     typeset -g "${target}=${(P)target}${(P)v}"
 548                 fi
 549                 ;;
 550             *) typeset -g "${target}=${(P)target}${new}" ;;
 551         esac
 552         typeset -g "${target}=${(P)target}${apost}"
 553     done
 554 }
 555
 556 prompt_ganneff_battery() {
 557     zstyle -s ':prompt:ganneff' battery pr_battery
 558     case $pr_battery in
 559             ibam)
 560                     local ACPIDATA=$(ibam --percentbattery 2>/dev/null || echo "")
 561             PERCENT=${${ACPIDATA[(f)1]}[(w)-2]}
 562             ;;
 563         acpi)
 564             PERCENT="${${"$(acpi 2>/dev/null)"}/(#b)[[:space:]]#Battery <->: [^0-9]##, (<->)%*/${match[1]}}"
 565             ;;
 566         *)
 567             PERCENT=""
 568             ;;
 569     esac
 570
 571     if [[ -z "$PERCENT" ]] ; then
 572         PERCENT="No battery or $pr_battery not present "
 573     else
 574         if [[ "$PERCENT" -lt 20 ]] ; then
 575             PERCENT="warning: ${PERCENT}%%"
 576         else
 577             PERCENT="${PERCENT}%%"
 578         fi
 579     fi
 580 }
 581
 582 is439(){
 583     [[ $ZSH_VERSION == 4.3.<9->* || $ZSH_VERSION == 4.<4->* \
 584                                  || $ZSH_VERSION == <5->* ]] && return 0
 585     return 1
 586 }
 587
 588 prompt_ganneff_setup "$@"