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ben-wpan/scripts/dsv
Werner Almesberger 6ec22bc755 Added a data sheet viewer. It improves upon the design used in gta02-core by
allowing a hierarchy of caches, by using only one directory for each cache,
and by putting only one command in the PATH.

- scripts/dsv: new and improved data sheet viewer (successor of gta02-core's
  dsv)
- Makefile: added "dsv" target to update the bookshelf
- ds/INFO, components/INFO, modules/INFO: ds/INFO moved to BOOKSHELF
- components/INFO, modules/INFO: renamed "D" tag to "N", for consistency with
  BOOKSHELF
- BOOKSHELF: changed "stdpass" URL to the actual PDF
2010-08-10 12:26:24 -03:00

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#!/bin/sh
#
# dsv - Improved data sheet viewer
#
#
# Theory of operation:
#
# We download data sheets from the Internet into local caches and provide a
# quick access mechanism for viewing the data sheets. A cache is a directory
# called .dsv/. Caches can be hierarchical. "dsv setup" generates a cache in
# the local directory. "dsv <component>" and "dsv ls" search the hierarchy,
# starting with the current directory.
#
# Caches contain two types of files: dsv-<ref> is the name or alias with
# which a data sheet is referenced. <ref>-<filename> is the actual data
# sheet, with <filename> being the name of the file we downloaded.
#
DSV_DIR=.dsv
usage()
{
echo "usage: $0 <component>" 2>&1
echo " $0 help" 2>&1
echo " $0 [ls]" 2>&1
echo " $0 setup <info-file> .." 2>&1
exit 1
}
up()
{
old="`pwd`"
cd ..
new="`pwd`"
[ "$old" != "$new" ]
}
flush()
{
[ -z "$name" ] && return
if [ -z "$url" ]; then
echo "$name: no URL" 2>&1
exit 1
fi
ds="$name-`basename "$url"`"
mkdir -p $DSV_DIR
if [ ! -r "$DSV_DIR/$ds" ]; then
wget -nv -O "$DSV_DIR/$ds" "$url"
# @@@ should handle error
fi
for n in $name $alias; do
echo "$ds" >$DSV_DIR/dsv-$n
done
name=
alias=
url=
}
set_value()
{
case "$tag" in
N:|n:) flush
name="$value";;
A:|a:) alias="$alias $value";;
D:|d:) url="$value";;
"")
;; # first iteration
*) echo "unrecognized tag \"$tag\"" 2>&1
exit 1;;
esac
value=
}
eof()
{
flush
tag=
}
setup()
{
for n in "$@"; do
if [ ! -r "$n" ]; then
echo "$n: not found" 2>&1
continue
fi
while read line; do
[ "$line" = "${line###}" ] || continue
tmp=`echo "$line" | awk '/^[^\t ]/ { print $1 }'`
tail="`echo "$line" | sed 's/^[^\t ]*[\t ]*//'`"
if [ -z "$tmp" ]; then
[ -z "$tail" ] || value="$value $tail"
else
set_value
tag=$tmp
value="$tail"
fi
done <"$n"
set_value
eof
done
}
list()
{
while true; do
if [ -d $DSV_DIR ]; then
ls -1 $DSV_DIR | sed 's/^dsv-//p;d'
fi
up || break
done | sort | uniq | column
}
search()
{
while true; do
if [ -d $DSV_DIR ]; then
if [ -r "$DSV_DIR/dsv-$1" ]; then
file="`cat $DSV_DIR/dsv-$1`"
if [ ! -r "$DSV_DIR/$file" ]; then
echo "$1 -> $file: does not exist" 2>&1
exit 1
fi
xpdf "$DSV_DIR/$file"
exit
fi
fi
if ! up; then
echo "no data sheet found for \"$1\"" 2>&1
exit 1
fi
done
}
case "$1" in
help|-*) usage;;
""|ls) list;;
setup) shift
setup "$@";;
*) search "$@";;
esac