src/vimtutor

   1 #! /bin/sh
   2
   3 # Start Vim on a copy of the tutor file.
   4
   5 # Usage: vimtutor [-g] [xx]
   6 # Where optional argument -g starts vimtutor in gvim (GUI) instead of vim.
   7 # and xx is a language code like "es" or "nl".
   8 # When an argument is given, it tries loading that tutor.
   9 # When this fails or no argument was given, it tries using 'v:lang'
  10 # When that also fails, it uses the English version.
  11
  12 # Vim could be called "vim" or "vi".  Also check for "vimN", for people who
  13 # have Vim installed with its version number.
  14 # We anticipate up to a future Vim 8 version :-).
  15 seq="vim vim8 vim75 vim74 vim73 vim72 vim71 vim70 vim7 vim6 vi"
  16 if test "$1" = "-g"; then
  17   # Try to use the GUI version of Vim if possible, it will fall back
  18   # on Vim if Gvim is not installed.
  19   seq="gvim gvim8 gvim75 gvim74 gvim73 gvim72 gvim71 gvim70 gvim7 gvim6 $seq"
  20   shift
  21 fi
  22
  23 xx=$1
  24 export xx
  25
  26 # We need a temp file for the copy.  First try using a standard command.
  27 tmp="${TMPDIR-/tmp}"
  28 TUTORCOPY=`mktemp $tmp/tutorXXXXXX || tempfile -p tutor || echo none`
  29
  30 # If the standard commands failed then create a directory to put the copy in.
  31 # That is a secure way to make a temp file.
  32 if test "$TUTORCOPY" = none; then
  33         tmpdir=$tmp/vimtutor$$
  34         OLD_UMASK=`umask`
  35         umask 077
  36         getout=no
  37         mkdir $tmpdir || getout=yes
  38         umask $OLD_UMASK
  39         if test $getout = yes; then
  40                 echo "Could not create directory for tutor copy, exiting."
  41                 exit 1
  42         fi
  43         TUTORCOPY=$tmpdir/tutorcopy
  44         touch $TUTORCOPY
  45         TODELETE=$tmpdir
  46 else
  47         TODELETE=$TUTORCOPY
  48 fi
  49
  50 export TUTORCOPY
  51
  52 # remove the copy of the tutor on exit
  53 trap "rm -rf $TODELETE" 0 1 2 3 9 11 13 15
  54
  55 for i in $seq; do
  56         testvim=`which $i 2>/dev/null`
  57         if test -f "$testvim"; then
  58                 VIM=$i
  59                 break
  60         fi
  61 done
  62
  63 # When no Vim version was found fall back to "vim", you'll get an error message
  64 # below.
  65 if test -z "$VIM"; then
  66         VIM=vim
  67 fi
  68
  69 # Use Vim to copy the tutor, it knows the value of $VIMRUNTIME
  70 # The script tutor.vim tells Vim which file to copy
  71 $VIM -f -u NONE -c 'so $VIMRUNTIME/tutor/tutor.vim'
  72
  73 # Start vim without any .vimrc, set 'nocompatible'
  74 $VIM -f -u NONE -c "set nocp" $TUTORCOPY