misc/completions/mkcomp.sh

   1 #!/bin/sh
   2 # mkcomp --- make completion files
   3 #
   4 # Usage: mkcomp <template file>
   5
   6 parse_infile () {
   7     # Output list of file extensions from all input files, one per line.
   8     # Delete lines beginning with `#', empty lines, and strip leading and
   9     # trailing whitespace.
  10     sed -f - <<EOF $@
  11 /^#/d
  12 /^[[:space:]]*$/d
  13 s/^[[:space:]]+//g
  14 s/[[:space:]]+$//g
  15 EOF
  16 }
  17
  18 print_regex () {
  19     # print regex of the file extensions from all input files
  20     # e.g. (foo|bar|baz)
  21     n=0
  22
  23     printf '('
  24     parse_infile $@ | \
  25         while read -r line; do
  26             if test -n "$line"; then
  27                 if test $n -eq 0; then
  28                     printf "%s" "$line"
  29                 else
  30                     printf "|%s" "$line"
  31                 fi
  32             fi
  33             n=$((n+1))
  34         done
  35     printf ')'
  36 }
  37
  38 # combine llpp.in and llppac.in if making a llppac completion
  39 f="$1"
  40
  41 if test "$(basename "$f")" = llppac; then
  42     llppac=llppac.in
  43 fi
  44 re="$(print_regex llpp.in $llppac)"
  45
  46 sed -e "s/@re@/$re/g" "$f.mk" > "$f"
  47 printf "wrote: %s\n" "$f"