ben-wpan/scripts/schhist2web

#!/bin/sh
#
# schhist2web - Web-browseable graphical revision history of schematics
#
# Written 2010 by Werner Almesberger
# Copyright 2010 Werner Almesberger
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#


OUTDIR=_out
THUMB_OPTS="-w 3 -d 60 -c 0.5,0.5,0.5 -n 1,1,0"
BG_COLOR="f0f0ff"
FNAME_COLOR="#b0f0ff"
SEP_COLOR="#000000"


shrink()
{
    pnmscale -width 120 "$@" || exit
}


pngdiff()
{
    # pngdiff preproc outfile arg ...
    pp="$1"
    of="$2"
    shift 2
    if ! PATH=$PATH:`dirname $0`/ppmdiff ppmdiff "$@" "$out/_tmp"; then
	rm -f "$out/_tmp"
	return 1
    fi
    $pp "$out/_tmp" | pnmtopng >"$of"
    rm "$out/_tmp"
}


usage()
{
    cat <<EOF 2>&1
usage: $0 [-c cache-dir] [-n] [top-dir] [top-schem] [out-dir]

  top-dir       top-level directory of the git archive (default: locate it)
  top-schem     root sheet of the schematics (default: locate it in top-dir)
  out-dir       output directory (default: $OUTDIR)
  -n            don't use previous cache content (rebuild the cache)
  -c cache-dir  cache directory (default: same as out-dir)
EOF
    exit 1
}


no_cache=false
while true; do
    case "$1" in
    -n)	no_cache=true
	shift;;
    -c)	[ -z "$1" ] && usage
	cache="$1"
	shift 2;;
    -*) usage;;
    *)	break;;
    esac
done

if [ ! -z "$1" -a -d "$1/.git" ]; then
    dir="$1"
    shift
else
    dir=.
    while [ ! -d $dir/.git ]; do
	if [ $dir -ef $dir/.. ]; then
	    echo "no .git/ directory found in hierarchy" 1>&2
	    exit 1
	fi
	dir=$dir/..
    done
    echo "found top-dir: $dir" 1>&2
fi

if [ ! -z "$1" -a -f "$dir/$1" -a \
  -f "$dir"/`dirname "$1"`/`basename "$1" .sch`.pro ]; then
    sch="$1"
    shift
else
    for n in "$dir"/*.sch; do
	[ -f `dirname "$n"`/`basename "$n" .sch`.pro ] || continue
	if [ ! -z "$sch" ]; then
	    echo "multiple choices for top-level .sch file" 1>&2
	    exit 1
	fi
	sch="$n"
    done
    if [ -z "$sch" -o "$sch" = "$dir/*.sch" ]; then
	echo "no candidate for top-level .sch file found" 1>&2
	exit 1
    fi
    echo "found root sheet: $sch" 1>&2
fi

if [ ! -z "$1" ] && [ ! -e "$1" ] || [ -d "$1" -a ! -d "$1"/.git ]; then
    out="$1"
    shift
else
    out=$OUTDIR
fi
[ -z "$cache" ] && cache="$out"

[ -z "$1" ] || usage

PATH=`dirname "$0"`:"$PATH"
first=`gitenealogy "$dir/$sch" | sed '$s/ .*//p;d'`
schname=`gitenealogy "$dir/$sch" | sed '$s/^.* //p;d'`

rm -rf "$out/diff_*" "$out/thumb_*" "$out/names"
$no_cache && rm -rf "$cache"
mkdir -p "$out/names"
mkdir -p "$cache"

for n in $first `git rev-list --reverse $first..HEAD`; do
echo Processing $n
    new=`gitenealogy "$dir/$sch" | sed "/^$n /s///p;d"`
    if [ ! -z "$new" ]; then
	echo Name change $schname to $new 1>&2
	schname="$new"
    fi
    trap "rm -rf \"$cache/ppm_$n\" \"$cache/fat_$n\"" 0
    if [ ! -d "$cache/ppm_$n" ]; then
	rm -rf "$cache/ppm_$n"
	mkdir "$cache/ppm_$n"
	gitsch2ppm "$dir" "$schname" $n "$cache/ppm_$n" || exit
	gitsch2ppm -w 500 "$dir" "$schname" $n "$cache/fat_$n" || exit
    fi
    for m in "$cache/ppm_$n/"*; do
	[ "$m" = "$cache/ppm_$n/*" ] && break
	touch "$out/names/"`basename "$m" .ppm`
    done
    trap 0
done

index="$out/index.html"
cat <<EOF >"$index"
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<HTML>
<BODY>
<TABLE bgcolor="$BG_COLOR" callpadding=1>
<TR bgcolor="$FNAME_COLOR">
EOF
for m in `ls -1 "$out/names"`; do
    echo "<TD><B>$m</B>" >>"$index"
done

head=`git rev-list HEAD~1..HEAD`
next="$head"
for n in `git rev-list $first..HEAD~1` $first; do
    empty=true
    s="<TR><TR>"
    mkdir -p "$out/diff_$next" "$out/thumb_$next"
    for m in `ls -1 "$out/names"`; do
	a="$cache/ppm_$n/$m.ppm"
	fat_a="$cache/fat_$n/$m.ppm"
	b="$cache/ppm_$next/$m.ppm"
	fat_b="$cache/fat_$next/$m.ppm"
	diff="$out/diff_$next/$m.png"
	thumb="$out/thumb_$next/$m.png"

	if [ -f "$a" -a -f "$b" ]; then
	    s="$s<TD>"
	    pngdiff cat "$diff" "$a" "$b" || continue
	    pngdiff shrink "$thumb" -f $THUMB_OPTS "$fat_a" "$fat_b" \
	      "$a" "$b" || exit
	elif [ -f "$a" ]; then
	    s="$s<TD>"
	    pngdiff cat "$diff" -f -c 1,0,0 "$a" "$a" || exit
	    pngdiff shrink "$thumb" -f -c 1,0,0 $THUMB_OPTS "$fat_a" "$fat_a" \
	      || exit
	elif [ -f "$b" ]; then
	    s="$s<TD>"
	    pngdiff cat "$diff" -f -c 0,1,0 "$b" "$b" || exit
	    pngdiff shrink "$thumb" -f -c 0,1,0 $THUMB_OPTS "$fat_b" "$fat_b" \
	      || exit
	else
	    s="$s<TD>"
	    continue
	fi
	echo "$s" >>"$index"
	s=
	empty=false
	echo "<A href=\"diff_$next/$m.png\"><IMG src=\"thumb_$next/$m.png\"></A>" >>"$index"
    done
    if ! $empty; then
	(
	    cat <<EOF
$s<TD valign="middle">
<TABLE bgcolor="$SEP_COLOR" cellspacing=0 width="100%"><TR><TD></TABLE>
EOF
    mkdir -p "$out/diff_$next" "$out/thumb_$next"
	    echo "<PRE>"
	    git log --pretty=short $n..$next |
	      sed 's/&/&amp;/g;s/</\&lt;/g;s/>/\&gt;/g'
	    echo "</PRE>"
	) >>"$index"
    fi
    next=$n
done

cat <<EOF >>"$index"
</TABLE>
<HR>
`date -u '+%F %X'` UTC
</BODY>
</HTML>
EOF
exit 1