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| 1 | #!/bin/sh |
| 2 | # |
| 3 | # dsv - Improved data sheet viewer |
| 4 | # |
| 5 | # Written 2010-2012 by Werner Almesberger |
| 6 | # Copyright 2010-2012 Werner Almesberger |
| 7 | # |
| 8 | # This program is free software; you can redistribute it and/or modify |
| 9 | # it under the terms of the GNU General Public License as published by |
| 10 | # the Free Software Foundation; either version 2 of the License, or |
| 11 | # (at your option) any later version. |
| 12 | # |
| 13 | |
| 14 | # |
| 15 | # Theory of operation: |
| 16 | # |
| 17 | # We download data sheets from the Internet into local caches and provide a |
| 18 | # quick access mechanism for viewing the data sheets. A cache is a directory |
| 19 | # called .dsv/. Caches can be hierarchical. "dsv setup" generates a cache in |
| 20 | # the local directory. "dsv <component>" and "dsv ls" search the hierarchy, |
| 21 | # starting with the current directory. |
| 22 | # |
| 23 | # Caches contain two types of files: dsv-<ref> is the name or alias with |
| 24 | # which a data sheet is referenced. <ref>-<filename> is the actual data |
| 25 | # sheet, with <filename> being the name of the file we downloaded. |
| 26 | # |
| 27 | |
| 28 | DSV_DIR=.dsv |
| 29 | |
| 30 | |
| 31 | usage() |
| 32 | { |
| 33 | echo "usage: $0 [-p] [-u] <component>" 2>&1 |
| 34 | echo " $0 help" 2>&1 |
| 35 | echo " $0 [ls]" 2>&1 |
| 36 | echo " $0 setup <info-file> ..." 2>&1 |
| 37 | echo 2>&1 |
| 38 | echo " -p show the path instead of displaying the file " 2>&1 |
| 39 | echo " -u show source URL instead of displaying the file " 2>&1 |
| 40 | exit 1 |
| 41 | } |
| 42 | |
| 43 | |
| 44 | up() |
| 45 | { |
| 46 | old=`pwd` |
| 47 | cd .. |
| 48 | new=`pwd` |
| 49 | [ "$old" != "$new" ] |
| 50 | } |
| 51 | |
| 52 | |
| 53 | flush() |
| 54 | { |
| 55 | eval nm=$name |
| 56 | nm=`echo "$nm" | sed 's/%/%25/g;s|/|%2F|g'` |
| 57 | [ -z "$nm" ] && return |
| 58 | if [ -z "$url" ]; then |
| 59 | echo "$nm: no URL" 2>&1 |
| 60 | exit 1 |
| 61 | fi |
| 62 | ds=$nm-`basename "$url"` |
| 63 | mkdir -p $DSV_DIR |
| 64 | if [ ! -r "$DSV_DIR/$ds" ]; then |
| 65 | inside=${url#*.[Zz][Ii][Pp] } |
| 66 | if [ "$inside" = "$url" ]; then |
| 67 | wget -nv -O "$DSV_DIR/$ds" "$url" |
| 68 | # @@@ should handle error |
| 69 | else |
| 70 | url=${url%`echo x"$inside" | sed 's/./?/g'`} |
| 71 | zip=$nm-`basename "$url"` |
| 72 | if [ ! -r "$DSV_DIR/$zip" ]; then |
| 73 | wget -nv -O "$DSV_DIR/$zip" "$url" |
| 74 | # @@@ should handle error |
| 75 | fi |
| 76 | unzip -p "$DSV_DIR/$zip" "$inside" >"$DSV_DIR/$ds" || |
| 77 | { rm -f "$DSV_DIR/$ds"; exit 1; } |
| 78 | fi |
| 79 | fi |
| 80 | eval for n in $name $alias\; do \ |
| 81 | 'nm=`echo "$n" | sed "s/%/%25/g;s|/|%2F|g"`;' \ |
| 82 | \{ echo '"$ds"'\; echo '"$url"'\; \} '>$DSV_DIR/dsv-$nm'\; \ |
| 83 | done |
| 84 | name= |
| 85 | alias= |
| 86 | url= |
| 87 | } |
| 88 | |
| 89 | |
| 90 | set_value() |
| 91 | { |
| 92 | case "$tag" in |
| 93 | N:|n:) flush |
| 94 | name="\"$value\"";; |
| 95 | A:|a:) alias="$alias \"$value\"";; |
| 96 | D:|d:) url=$value;; |
| 97 | "") |
| 98 | ;; # first iteration |
| 99 | *) echo "unrecognized tag \"$tag\"" 2>&1 |
| 100 | exit 1;; |
| 101 | esac |
| 102 | value= |
| 103 | } |
| 104 | |
| 105 | |
| 106 | eof() |
| 107 | { |
| 108 | flush |
| 109 | tag= |
| 110 | } |
| 111 | |
| 112 | |
| 113 | setup() |
| 114 | { |
| 115 | for n in "$@"; do |
| 116 | if [ ! -r "$n" ]; then |
| 117 | echo "$n: not found" 2>&1 |
| 118 | continue |
| 119 | fi |
| 120 | # |
| 121 | # "read" doesn't recognize lines that don't end with a newline. |
| 122 | # The cat-sed hack below works around this problems. |
| 123 | # |
| 124 | cat -E "$n" | sed 's/[^$]$/&\n/;s/$$//' | { |
| 125 | while read line; do |
| 126 | [ "$line" = "${line###}" ] || continue |
| 127 | tmp=`echo "$line" | awk '/^[^\t ]/ { print $1 }'` |
| 128 | tail=`echo "$line" | sed 's/^[^\t ]*[\t ]*//;s/[\t ]*$//'` |
| 129 | if [ -z "$tmp" ]; then |
| 130 | [ -z "$tail" ] || value="$value $tail" |
| 131 | else |
| 132 | set_value |
| 133 | tag=$tmp |
| 134 | value=$tail |
| 135 | fi |
| 136 | done |
| 137 | set_value |
| 138 | eof |
| 139 | } |
| 140 | done |
| 141 | } |
| 142 | |
| 143 | |
| 144 | list() |
| 145 | { |
| 146 | while true; do |
| 147 | if [ -d $DSV_DIR ]; then |
| 148 | ls -b -1 $DSV_DIR | sed 's/^dsv-//p;d' | sed 's|%2F|/|g;s/%25/%/g' |
| 149 | fi |
| 150 | up || break |
| 151 | done | sort | uniq | column |
| 152 | } |
| 153 | |
| 154 | |
| 155 | search() |
| 156 | { |
| 157 | while true; do |
| 158 | if [ -d $DSV_DIR ]; then |
| 159 | name=`echo "$1" | sed 's/%/%25/g;s|/|%2F|g'` |
| 160 | if [ -r "$DSV_DIR/dsv-$name" ]; then |
| 161 | file=`sed 1q "$DSV_DIR/dsv-$name"` |
| 162 | if [ ! -r "$DSV_DIR/$file" ]; then |
| 163 | echo "$1 -> $file: does not exist" 2>&1 |
| 164 | exit 1 |
| 165 | fi |
| 166 | if $path; then |
| 167 | echo "`pwd`/$DSV_DIR/$file" |
| 168 | elif ! $show_url; then |
| 169 | ${DSV_VIEWER:-${DSV_PDFVIEWER:-xdg-open}} "$DSV_DIR/$file" |
| 170 | fi |
| 171 | if $show_url; then |
| 172 | url=`sed 1d "$DSV_DIR/dsv-$name"` |
| 173 | if [ "$url" ]; then |
| 174 | echo "$url" |
| 175 | else |
| 176 | echo "$DSV_DIR/dsv-$name" \ |
| 177 | "does not contain an URL - please regenerate" 1>&2 |
| 178 | exit 1 |
| 179 | fi |
| 180 | fi |
| 181 | exit |
| 182 | fi |
| 183 | fi |
| 184 | if ! up; then |
| 185 | echo "no data sheet found for \"$1\"" 2>&1 |
| 186 | exit 1 |
| 187 | fi |
| 188 | done |
| 189 | } |
| 190 | |
| 191 | |
| 192 | path=false |
| 193 | show_url=false |
| 194 | |
| 195 | while true; do |
| 196 | case "$1" in |
| 197 | -p) path=true |
| 198 | shift;; |
| 199 | -u) show_url=true |
| 200 | shift;; |
| 201 | -*) usage;; |
| 202 | *) break;; |
| 203 | esac |
| 204 | done |
| 205 | |
| 206 | case "$1" in |
| 207 | help|-*) usage;; |
| 208 | ""|ls) list;; |
| 209 | setup) shift |
| 210 | [ "$1" ] || usage |
| 211 | setup "$@";; |
| 212 | *) search "$@";; |
| 213 | esac |
| 214 |
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