examples/gen_example_code.sh

   1 #!/bin/bash
   2 ##
   3 ##  Copyright (c) 2010 The VP8 project authors. All Rights Reserved.
   4 ##
   5 ##  Use of this source code is governed by a BSD-style license and patent
   6 ##  grant that can be found in the LICENSE file in the root of the source
   7 ##  tree. All contributing project authors may be found in the AUTHORS
   8 ##  file in the root of the source tree.
   9 ##
  10
  11
  12 # gen_example_code.sh
  13
  14 self=$0
  15
  16 die_usage() {
  17     echo "Usage: $self <example.txt>"
  18     exit 1
  19 }
  20
  21 die() {
  22     echo "$@"
  23     exit 1
  24 }
  25
  26 include_block() {
  27     show_bar=$1
  28     block_name=${line##*@}
  29     indent=${line%%${block_name}}
  30     indent=${#indent}
  31     [ $indent -eq 1 ] && indent=0
  32     local on_block
  33     while IFS=$'\n' read -r t_line; do
  34         case "$t_line" in
  35             \~*\ ${block_name})
  36                 if [ "x$on_block" == "xyes" ]; then
  37                     return 0;
  38                 else
  39                     on_block=yes
  40                 fi
  41                 ;;
  42             @DEFAULT)
  43                 if [ "x$on_block" == "xyes" ]; then
  44                     include_block $show_bar < "${template%.c}.txt"
  45                     return 0
  46                 fi
  47                 ;;
  48             *)
  49                 if [ "x$on_block" == "xyes" ]; then
  50                     local rem
  51                     (( rem = 78 - indent ))
  52                     case "$block_name" in
  53                       \**) printf "%${indent}s * %s\n" "" "$t_line" ;;
  54                         *)
  55                             if [ "$show_bar" == "yes" ]; then
  56                                 printf "%${indent}s%-${rem}s//\n" "" "$t_line"
  57                             else
  58                                 printf "%${indent}s%s\n" "" "$t_line"
  59                             fi
  60                             ;;
  61                     esac
  62                 fi
  63         esac
  64     done
  65     return 1
  66 }
  67
  68 txt=$1
  69 [ -f "$txt" ] || die_usage
  70 read -r template < "$txt"
  71 case "$template" in
  72     @TEMPLATE*) template=${txt%/*}/${template##@TEMPLATE } ;;
  73     *) die "Failed to parse template name from '$template'" ;;
  74 esac
  75
  76 while IFS=$'\n' read -r line; do
  77     case "$line" in
  78         @*) include_block yes < "$txt" \
  79             || include_block < "${template%.c}.txt" \
  80             #|| echo "WARNING: failed to find text for block $block_name" >&2
  81             ;;
  82         *)  echo "$line" ;;
  83     esac
  84 done < "$template"