examples/gen_example_code.sh

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