summary refs log tree commit diff
path: root/Functions/Newuser/zsh-newuser-install
blob: d8fd437ed02dc0aa11f58f817eb5fedcf851997f (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
# Function to install startup files for a new user.
# Currently it only creates or edits .zshrc.
#
# It can be run again by giving it the option "-f".

# Sanitize environment.
emulate -L zsh
setopt extendedglob nonomatch warncreateglobal

# How the function will be referred to.
local myname=zsh-newuser-install
# The directory in which to look for and save .zshrc.
local zd=${ZDOTDIR:-$HOME}
# The same directory in a user friendly form, i.e. with ~ replacement.
# (We don't want to use glob_subst since that has other side effects.)
local zdmsg
# The message used if an other blank .zshrc is created.
local msg="# Created by newuser for $ZSH_VERSION"
# The lines marking the start and end of the section edited.
local startline="# Lines configured by $myname"
local endline="# End of lines configured by $myname"
# Prompts used for reading a key.  The initial "?" is required.
local shortprompt="?--- Type a key --- "
local longprompt="?--- Type one of the keys in parentheses --- "
# Prefix for all temporary files.  Any files starting with this
# will be removed at the end of the script.
local tmpfile=${TMPPREFIX:-/tmp/zsh}-zni-$$
# Report of the state of settings for the top-level menu.
local -A install_state
# Values of all parameters etc. to be saved (including
# those read in from the existing file.)
local -A parsed_parameters parsed_options parsed_bindings parsed_keymaps
# Corresponding state in a user-readable form.
local -A state_parameters state_options state_bindings state_keymaps
# Lines read in from between $startline and $endline which were
# not understood.  These are retained but moved out of that section
# with a message.
local -a unparsed
# Lines used in submenus: the setting to output in a form
# that can be exeucuted (an assignment, setopt or unsetopt), a brief message
# about the setting, and the state copied from and to state_parameters or
# state_options.  Elements of all three arrays must correspond.
local -a output_lines display_lines state_lines
# Variable indicating some of the lines in the above variables
# have been read in, i.e. the user has already configured the
# particular set of settings.
integer lines_read
# Lines to set up completion.  This is special as it is only
# edited by compinstall, not this function.
local -a completion_lines
# Utility variables
local -a reply match mbegin mend
# Key read from user, used all over the place.
local key
integer save lines_found

install_state[history]=Recommended
install_state[completion]=Recommended

# Don't save anything if interrupted.
trap 'save=0' HUP INT QUIT

# Substitute an initial ~ for human consumption.
if [[ $zd = $HOME(#b)(|/*) ]]; then
  zdmsg="~$match[1]"
else
  zdmsg=$zd
fi

# Don't run unless we can talk to the user.
if [[ ! -t 0 || ! -t 1 ]]; then
  if [[ $1 = -f ]]; then
    print -r "$myname: can only be used interactively." >&2
  fi
  return 1
fi

# Don't run unless terminal is sane.
if (( ${LINES:-0} < 15 || ${COLUMNS:-0} < 72 )); then
  return 1
fi

if [[ $1 != -f ]]; then
  # The zsh/newuser module already tests for the following, so this test only
  # triggers if zsh-newuser-install is run by hand.
  if [[ -e $zd/.zshenv || -e $zd/.zprofile || \
        -e $zd/.zshrc || -e $zd/.zlogin ]]; then
    print -r "$myname:  startup files exist, aborting.

Use the argument -f if you want to force the function to be run again." >&2
    return 1
  fi
fi


# start of try block for tidy-up in always block
{

########################################################################
# Utility functions
########################################################################

# All internal functions start with __zni_.  These will be removed
# when the main function exits.

# Read existing lines from .zshrc, if any.
__zni_retrieve_lines() {
  local line

  reply=()

  lines_found=0

  [[ -f $zd/.zshrc ]] || return 1

  grep "$startline" $zd/.zshrc 1>/dev/null 2>&1 || return 1

  lines_found=1

  sed -n "/^[	]*$startline/,/^[	]*$endline/p" $zd/.zshrc |
  while read -r line; do
    reply+=($line)
  done

  return 0
}


# First argument is a state; other arguments are lines
# to parse.  They should either contain single assignments or
# setopt or unsetopt statements.  The state for each parameter
# or option so parsed is set to the value given by the first argument.
__zni_parse_lines() {
  local line opt warned first
  local -a args
  local state=$1

  shift

  for line in "$@"; do
    case $line in
      ((#b)[[:blank:]]#([[:IDENT:]]##)=(*))
      parsed_parameters[$match[1]]=$match[2]
      state_parameters[$match[1]]=$state
      ;;

      ((#b)[[:blank:]]#(un|)setopt[[:blank:]]##(*))
      # TBD: handle setopt noX / unsetopt X
      for opt in ${=match[2]}; do
	opt=${${opt//(#m)[[:upper:]]/${(L)MATCH}}//_}
	if [[ $match[1] = un ]]; then
	  parsed_options[$opt]=off
	else
	  parsed_options[$opt]=on
	fi
	state_options[$opt]=$state
      done
      ;;

      ((#b)[[:blank:]]#bindkey[[:blank:]]##(*))
      args=(${(z)match[1]})
      # store keys unquoted: will need quoting for output.
      first=${(Q)args[1]}
      shift args
      if [[ $first = -[ev] && ${#args} -eq 0 ]]; then
	case $first in
	  (-e)
	  parsed_keymaps[main]=emacs
	  ;;

	  (-v)
	  parsed_keymaps[main]=vi
	  ;;
	esac
	state_keymaps[main]=$state
      else
	# TODO: handling keymap options
	parsed_bindings[first]=${args[2,-1]}
	state_bindings[first]=$state
      fi
      ;;

      ([[:blank:]]#($startline|$endline|))
      ;;

      (*)
      unparsed+=($line)
      print -r "WARNING: failed to understand line:
  $line
which will be retained but not edited."
      warned=1
      ;;
    esac
  done

  if [[ -n $warned ]]; then
    read -k key$shortprompt
  fi
}

# Apply defaults.  Arguments in the form
#   -p parameter_name default_value description
#      ...
#   -o option_name default=on|off description
#      ...
#   -b bindkey_string default_value description
#      ...
#   -B default_keymap=emacs|vi|none description
#
# They're not really defaults (they're not the same as the
# builtin defaults), so the description output is "not yet saved".
#
# All variables to be edited in this section must be mentioned,
# though defaults can be blank in which case nothing will be
# saved unless the variable is set by the user.  The description
# is then "no value set".
#
# -B is a bit strange: it's simply designed to allow the user to
# select "bindkey -e" for Emacs or "bindkey -v" for vi.  It only
# takes a single argument.  Real key bindings use -b.
#
# This operation transfers some subset of settings from the parsed_*
# and state_* variables to the *_lines variables for editing.
__zni_apply_defaults() {
  local un

  # Reset the lines to be edited.
  state_lines=()
  display_lines=()
  output_lines=()
  lines_read=0

  case $1 in
    (-p)
    shift
    while [[ $# -gt 0 && $1 != -* ]]; do
      # skip default if it was read in
      if [[ -z $state_parameters[$1] ]]; then
	parsed_parameters[$1]=$2
	if [[ -n $2 ]]; then
	  state_parameters[$1]="not yet saved"
	else
	  state_parameters[$1]="no value set"
	fi
      elif [[ $state_parameters[$1] = saved ]]; then
	(( lines_read++ ))
      fi
      state_lines+=($state_parameters[$1])
      display_lines+=("$3")
      output_lines+=("$1=$parsed_parameters[$1]")

      shift 3
    done
    ;;

    (-o)
    shift
    while [[ $# -gt 0 && $1 != -* ]]; do
      # skip default if there was a setting
      if [[ -z $state_options[$1] ]]; then
	parsed_options[$1]=$2
	if [[ -n $2 ]]; then
	  state_options[$1]="not yet saved"
	else
	  state_options[$1]="no value set"
	fi
      elif [[ $state_parameters[$1] = saved ]]; then
	(( lines_read++ ))
      fi
      if [[ $parsed_options[$1] = on ]]; then
	un=
      else
	# display as unsetopt even if no value to save yet
	un=un
      fi
      state_lines+=($state_options[$1])
      display_lines+=("$3")
      output_lines+=("${un}setopt $1")

      shift 3
    done
    ;;

    (-b)
    shift
    # this will barf on bindings beginning -; there's no good
    # reason to rebind that, even in vi command mode, so perhaps
    # we just add it to the sanity checks when we get around to them.
    while [[ $# -gt 0 && $1 != -* ]]; do
      if [[ -z $state_bindings[$1] ]]; then
	parsed_bindings[$1]=$2
	if [[ -n $2 ]]; then
	  state_bindings[$1]="not yet saved"
	else
	  state_bindings[$1]="no value set"
	fi
      elif [[ $state_bindings[$1] = saved ]]; then
	(( lines_read++ ))
      fi
      state_lines+=($state_bindings[$1])
      display_lines+=("$3")
      output_lines+=("bindkey ${(qq)1}${2:+ $2}")

      shift 3
    done
    ;;

    (-B)
    shift
    if [[ -z $state_keymaps[main] ]]; then
      parsed_keymaps[main] = $1
      if [[ $1 = none ]]; then
	state_keymaps[main]="no value set"
      else
	state_keymaps[main]="not yet saved"
      fi
    elif [[ $state_keymaps[main] = saved ]]; then
      (( lines_read++ ))
    fi
    state_lines+=($state_keymaps[main])
    display_lines+=("$2")
    # display as -e even if no value to save yet
    if [[ $parsed_keymaps[main] = vi ]]; then
      output_lines+=("bindkey -v")
    else
      output_lines+=("bindkey -e")
    fi

    shift 2
    ;;
  esac
}


# Display and edit the settings given by the set of *_lines arrays.
# If requested by the user, apply the settings, updating the
# parsed_* and state_* variables.
__zni_display_and_edit() {
  integer i changes
  local default edval ldisp rdisp
  local -a states displays outputs tstval

  states=("${state_lines[@]}")
  displays=("${display_lines[@]}")
  outputs=("${output_lines[@]}")

  while true; do
    clear
    print -r $1
    # snicker...
    print -r ${(l.${#1}..=.):-}
    print
    if (( $# > 1 )); then
      print -rl $argv[2,-1]
      print
    fi

    # Output each setting with a description and state.
    for (( i = 1; i <= ${#output_lines}; i++ )); do
      default=$states[$i]
      if [[ $default = ("no value set"|"not to be saved") ]]; then
	ldisp="# $outputs[$i]"
      else
	ldisp=$outputs[$i]
      fi
      rdisp=${default:+($default)}
      print -r "# ($i) $displays[$i]
$ldisp${(l.$COLUMNS-${#ldisp}-${#rdisp}-1.):-}$rdisp"
    done

    if (( changes )); then
      print -r "
# (0)  Remember edits and return to main menu (does not save file yet)
# (q)  Abandon edits and return to main menu
"
    else
      print -r "
# (0) or (q)  Return to main menu (no changes made yet)
"
    fi
    read -k key$longprompt
    print

    if [[ $key = <-> && $key -ge 1 && $key -le ${#outputs} ]]; then
      (( i = key ))
      case $outputs[$i] in
	((#b)(|un)setopt' '(*))
	while true; do
	  clear
	  print "Option $match[2]:  $displays[$i]
The option is currently ${match[1]:+un}set.
Type:
  (s) to set it
  (u) to unset it
  (n) not to set or unset it (use shell default)
  (k) to keep the current setting:"
	  read -k key$shortprompt
	  print

	  case $key in
	    (s)
	    (( changes++ ))
	    outputs[$i]="setopt $match[2]"
	    states[$i]="set but not saved"
	    ;;

	    (s)
	    (( changes++ ))
	    outputs[$i]="unsetopt $match[2]"
	    states[$i]="set but not saved"
	    ;;

	    (n)
	    (( changes++ ))
	    outputs[$i]="unsetopt $match[2]"
	    states[$i]="no value set"
	    ;;

	    (k)
	    ;;

	    (*)
	    continue
	    ;;
	  esac
	  break;
	done
	;;

	((#b)([^=]##)=(*))
	print -r "Variable ${match[1]}:  $displays[$i]
Edit a value.  If it is left blank, nothing will be saved:"
	edval=$match[2]
	if vared -p "$match[1]> " -h edval; then
	  # check this assignment doesn't produce multiple words
	  # e.g. "HISTFILE=never rm -f ~" does produce multiple words...
	  # this isn't perfect, e.g. "(this would get split on assignment)",
	  # but that's fairly benign.
	  tstval=(${=edval})
	  if (( ${#tstval} > 1 )); then
	    print "Error: value isn't a single word.
Use quotes or backslashes if your value contains spaces.
Note that you shouldn't quote an initial ~ in file names." >&2
	    read -k key$shortprompt
	    # now check the assignment works...
	    # don't suppress any errors, they may be useful.
	    # this means we need to suppress warncreateglobal.
	  elif ! ( typeset -g $match[1]; eval "$match[1]=$edval" ); then
	    print "Error: bad shell syntax in value.
The value will be assigned to the variable exactly as you enter it.
Make sure all quotes are paired." >&2
	    read -k key$shortprompt
	  else
	    outputs[$i]="$match[1]=$edval"
	    if [[ -n $edval ]]; then
	      states[$i]="set but not saved"
	    else
	      states[$i]="no value set"
	    fi
	    (( changes++ ))
	  fi
	else
	  read -k key'?--- Edit abandoned, type a key --- '
	fi
	;;

	(bindkey' '-[ev])
	while true; do
	  print -nr "Pick a keymap (set of keys) to use when editing.
Type:
  (e) for Emacs keymap (recommended unless you are vi user)
  (v) for Vi keymap
  (n) not to set a keymap (allow shell to choose)
  (k) to keep the current setting, "
	  if [[ $state_lines[$i] = ("no value set"|"not to be saved") ]]
	  then
	    print -r "(n):"
	  elif [[ $output_lines[$i] = *-v ]]; then
	    print -r "(v):"
	  else
	    print -r "(e):"
	  fi
	  read -k key$longprompt
	  case $key in
	    (e)
	    (( changes++ ))
	    outputs[$i]="bindkey -e"
	    states[$i]="set but not saved"
	    ;;

	    (v)
	    (( changes++ ))
	    outputs[$i]="bindkey -v"
	    states[$i]="set but not saved"
	    ;;

	    (n)
	    (( changes++ ))
	    outputs[$i]="bindkey -e"
	    states[$i]="not to be saved"
	    ;;

	    (k)
	    ;;

	    (*)
	    continue
	    ;;
	  esac
	  break
	done
	;;

	(bindkey' '*)
	# TODO: this needs writing.  We need to be able to read
	# keys and translate them, sanity check them, and ideally
	# handle keymaps, at least vi command and insert.
	;;

	(*)
	print "*** Internal error: bad setting '$outputs[$i]' ***" >&2
	read -k key'?--- Type a key in forlorn hope --- '
	;;
      esac
    elif [[ $key = 0 ]]; then
      # Update the *_lines variables
      state_lines=("${states[@]}")
      display_lines=("${displays[@]}")
      output_lines=("${outputs[@]}")

      # Also save any lines suitably marked to parsed_* and state_*
      # by rerunning __zni_parse_lines on each such line.
      for (( i = 1; i <= ${#output_lines}; i++ )); do
	if [[ $state_lines[$i] = ("set but not saved"|"not to be saved") ]]
	then
	  __zni_parse_lines $state_lines[$i] $output_lines[$i]
	fi
      done

      return $(( changes == 0 ))
    elif [[ $key = [qQ] ]]; then
      return 1
    fi
  done
}


# Print and despatch a submenu.
# The first argument is the title.  The remaining arguments
# are pairs of descriptions and functions to execute.
# There shouldn't be more than 9 entries.
# The usual entries 0 and q are added automatically.
__zni_submenu() {
  local title=$1
  local desc func
  local -a descs funcs
  integer i

  shift

  clear
  print -r $title
  print -r ${(l.${#title}..=.):-}

  for desc func; do
    if [[ -z $func ]]; then
      print "*** Internal error: bad argument set for __zni_submenu ***" >&2
      read -k key'?--- Type a key in forlorn hope --- '
      return 1
    fi

    descs+=($desc)
    funcs+=($func)
  done

  while true; do
    for (( i = 1; i <= ${#descs}; i++ )); do
      print -r "
($i)  $descs[$i]"
    done
    print -r "
(0) or (q)  Return to previous menu"

    read -k key$longprompt

    if [[ $key = [0qQ] ]]; then
      return 1
    elif (( key >= 1 && key <= ${#funcs} )); then
      $funcs[$key]
    fi
  done
}


# Save all values that have been edited to .zshrc.
__zni_save() {
  local key optline newline
  local -a on_opts off_opts lines lines2
  integer i

  # Record lines containing parameter settings, sorted.
  for key in ${(ok)parsed_parameters}; do
    if [[ $state_parameters[$key] != ("no value set"|"not to be saved") ]]
    then
      lines+=("$key=$parsed_parameters[$key]")
    fi
  done

  # Search through sorted options, make list of those to
  # be turned on and off.  Those marked "no value set" aren't
  # to be output.
  for key in ${(ok)parsed_options}; do
    if [[ $state_options[$key] != ("no value set"|"not to be saved") ]]; then
      if [[ $parsed_options[$key] = on ]]; then
	on_opts+=($key)
      else
	off_opts+=($key)
      fi
    fi
  done

  # Construct lines of options to turn on, keeping them short.
  optline="setopt"
  for (( i = 1; i <= ${#on_opts}; i++ )); do
    newline="$optline $on_opts[$i]"
    if [[ ${#newline} -ge 72 ]]; then
      lines+=($optline)
      optline="setopt $on_opts[$i]"
    else
      optline=$newline
    fi
    if (( i == ${#on_opts} )); then
      lines+=($optline)
    fi
  done

  # Construct lines of options to turn off, keeping them short.
  optline="unsetopt "
  for (( i = 1; i <= ${#off_opts}; i++ )); do
    newline="$optline $off_opts[$i]"
    if [[ ${#newline} -ge 72 ]]; then
      lines+=($optline)
      optline="unsetopt $off_opts[$i]"
    else
      optline=$newline
    fi
    if (( i == ${#off_opts} )); then
      lines+=($optline)
    fi
  done

  # Construct lines of bindkey commands.  First the keymap.
  if [[ $state_keymaps[main] != (|"no value set"|"not to be saved") ]]; then
    case $parsed_keymaps[main] in
      (emacs)
      lines+=("bindkey -e")
      ;;

      (vi)
      lines+=("bindkey -v")
      ;;
    esac
  fi
  # Now bindings.
  for key in ${(ok)parsed_bindings}; do
    if [[ $state_bindings[$key] != ("no value set"|"not to be saved") ]]; then
      lines+=("bindkey ${(qq)key} ${parsed_bindings[$key]}")
    fi
  done

  # Save the lines with a start and end marker to a temporary file.
  print -rl $startline $lines $endline >$tmpfile

  if (( ${#unparsed} )); then
    print "# The following lines were read by $myname.
# They were moved here as they could not be understood.
# $(date)
${(F)unparsed}
# End of lines moved by $myname." >>$tmpfile
  fi

  if grep "$startline"  $zd/.zshrc 1>/dev/null 2>&1; then
    # Found the start line; replace the section.
    # We could this by reading the lines in zsh, but in case
    # the .zshrc is huge it's perhaps better to use sed.
    sed -e "/^[		]*$endline/r $tmpfile
/^[	]*$startline/,/^[	]*$endline/d" $zd/.zshrc >${tmpfile}.repl &&
    cp ${tmpfile}.repl $zd/.zshrc
  else
    # No current start marker; just append.
    cat $tmpfile >>$zd/.zshrc
  fi
}


########################################################################
# Specific configurations
########################################################################

__zni_history_config() {
  __zni_apply_defaults -p \
    HISTORY 1000 "Number of lines of history kept within shell" \
    HISTFILE $zdmsg/.histfile "File where history is saved" \
    SAVEHIST 1000 "Number of lines of history to save to \$HISTFILE"

  if __zni_display_and_edit "History configuration"; then
    install_state[history]="Unsaved changes"
    save=1
  fi
}


__zni_completion_config() {
  autoload -Uz compinstall
  if compinstall -d; then
    print "The completion system has already been activated.
You can run the configuration tool (compinstall) at any time by typing
   autoload -Uz compinstall
   compinstall
Do you wish to run it now [y/n]?"
    read -k key$shortprompt
    if [[ $key = [yY] ]]; then
      compinstall
    fi
    print
  else
    while true; do
      clear
      print "The new completion system (compsys) allows you to complete
commands, arguments and special shell syntax such as variables.  It provides
completions for a wide range of commonly used commands in most cases simply
by typing the TAB key.  Documentation is in the zshcompsys manual page.
If it is not turned on, only a few simple completions such as filenames
are available but the time to start the shell is slightly shorter.

You can:
  (1)  Turn on completion with the default options.

  (2)  Run the configuration tool (compinstall).  You can also run
       this from the command line with the following commands:
        autoload -Uz compinstall
        compinstall
       if you don't want to configure completion now.

  (0)  Don't turn on completion.
"
      read -k key$longprompt
      case $key in
	(1)
	completion_lines=${(f)"$(compinstall -o)"}
	install_state[completion]="Unsaved changes"
	save=1
	;;

	(2)
	compinstall
	install_state[completion]="Configured"
	;;

	(0)
	completion_lines=()
	install_state[completion]="Recommended"
	;;

	(*)
	continue
	;;
      esac
      break
    done
  fi
}

__zni_bindkey_config() {
  __zni_apply_defaults -B none "Change default editing configuration"

  if __zni_display_and_edit "Default editing configuration" \
    "The keys in the shell's line editor can be made to behave either" \
    "like Emacs or like Vi, two common Unix editors.  If you have no" \
    "experience of either, Emacs is recommended.  If you don't pick one," \
    "the shell will try to guess based on the EDITOR environment variable." \
    "Usually it's better to pick one explicitly."; then
    install_state[bindkey]="Unsaved changes"
    save=1
  fi
}

__zni_completion_save() {
  if (( ${#completion_lines} )); then
    # We don't try to replace existing lines of completion configuration ---
    # that's up to compinstall.  We should already have tested that
    # there was no existing completion set up.
    print -rl $completion_lines >>$zd/.zshrc
  fi
}


__zni_options_config() {
  # when we have enough, should use:
  #   __zni_submenu "Common shell options"

  # This is deliberately just a tiny selection.
  # Feel free to extend it, but if you do, consider using __zni_submenu.
  # The "no" prefix is used to indicate options on by default.
  __zni_apply_defaults -o autocd '' "Change directory given just path" \
    extendedglob '' "Use additional pattern matching features" \
    appendhistory '' "Append new history lines instead of overwriting" \
    nonomatch '' "Pass unmatched patterns to command instead of error" \
    nobeep '' "Don't beep on errors" \
    notify '' "Immediately report changes in background job status"

  if __zni_display_and_edit "Common shell options" \
  "The following are some of the shell options that are most often used." \
  "The descriptions are very brief; if you would like more information," \
  "read the zshoptions manual page (type \"man zshoptions\")."; then
    install_state[options]="Unsaved changes"
    save=1
  fi
}


########################################################################
# Main function
########################################################################

# Read and parse any existing lines, in case the function
# was called again.
__zni_retrieve_lines &&
  __zni_parse_lines saved "$reply[@]"

if [[ $state_parameters[HISTORY] = saved ]]; then
  install_state[history]="Saved"
fi
autoload -Uz compinstall
zstyle :compinstall filename $zd/.zshrc
if compinstall -d; then
  install_state[completion]="Saved"
fi


clear
print -r "This is the Z Shell configuration function for new users, $myname."
if [[ $1 != -f ]]; then
  print -r "You are seeing this message because you have no zsh startup files
(the files .zshenv, .zprofile, .zshrc, .zlogin in the directory
$zdmsg).  This function can help you with a few settings that should
make your use of the shell easier."
fi

print -r "
You can:

(q)  Quit and do nothing.  The function will be run again next time."
if [[ ! -f $zd/.zshrc ]]; then
  print -r "
(0)  Exit, creating the file $zdmsg/.zshrc containing just a comment.
     That will prevent this function being run again."
fi
print -r "
(1)  Continue to main menu.
"

read -k key$longprompt
print

case $key in
  ([qQ])
  return 0
  ;;

  (0)
  print -r $msg >$zd/.zshrc
  return 0
  ;;

  (1)
  ;;

  (*)
  print -r "Aborting."
  if [[ $1 != -f ]]; then
    print "The function will be run again next time.  To prevent this, execute:
  touch $zdmsg/.zshrc"
  fi
  return 1
  ;;
esac

while true; do
  clear
  print -nr "Please pick one of the following options:

(1)  Configure settings for history, i.e. command lines remembered
     and saved by the shell.\
${install_state[history]:+  ($install_state[history].)}

(2)  "
  if [[ $install_state[completion] = Recommended ]]; then
    print -nr "Configure"
  else
    print -nr "Use"
  fi
  print -r " the new completion system.\
${install_state[completion]:+  ($install_state[completion].)}

(3)  Configure how keys behave when editing command lines.

(4)  Pick some of the more common shell options.  These are simple on
     or off switches controlling the shell's features.  \
${install_state[options]:+  ($install_state[options].)}
"
  print -nr "(0)  Exit, "
  if (( save )); then
    print -r "saving the new settings.  They will take effect immediately."
  elif [[ -f $zd/.zshrc ]]; then
    print -r "leaving the existing $zdmsg/.zshrc alone."
  else
    print -r "creating a blank $zdmsg/.zshrc file."
  fi
  print -r "
(a)  Abort all settings and start from scratch.  Note this will overwrite
     any settings from $myname already in the startup file.
     It will not alter any of your other settings, however."
  if [[ $1 = -f ]]; then
    print -r "
(q)  Quit and do nothing else."
  else
    print -r "
(q)  Quit and do nothing else.  The function will be run again next time."
  fi

  read -k key$longprompt
  print

  case $key in
    ([qQ])
    break
    ;;

    ([aA])
    parsed_parameters=()
    state_parameters=()
    parsed_options=()
    state_options=()
    parsed_keymaps=()
    state_keymaps=()
    parsed_bindings=()
    state_bindings=()
    unparsed=()
    ;;

    (0)
    clear
    if (( save )); then
      if [[ -f $zd/.zshrc ]]; then
	cp $zd/.zshrc $zd/.zshrc.zni &&
	print -r "Copied old '$zdd/.zshrc' to '$zdd/.zshrc.zni'.
"
      fi

      __zni_save
      __zni_completion_save
    elif [[ ! -f $zd/.zshrc ]]; then
      print -r $msg >$zd/.zshrc
    fi
    if [[ $1 != -f ]]; then
      print -r "The function will not be run in future, but you can run
it yourself as follows:
  autoload $myname
  $myname -f

The code added to $zdmsg/.zshrc is marked by the lines
$startline
$endline
You should not edit anything between these lines if you intend to
run $myname again.  You may, however, edit any other part
of the file."
    fi
    break
    ;;

    (1)
    __zni_history_config
    ;;

    (2)
    __zni_completion_config
    ;;

    (3)
    __zni_bindkey_config
    ;;

    (4)
    __zni_options_config
    ;;
  esac
done

} always {
  # Tidy up: always executed unless the shell is stopped dead
  # in its tracks.
  unfunction -m $myname __zni_\*
  rm -f $tmpfile*
}