Run eeschema only once (not twice) per commit. 20% speed improvement.

- scripts/gitsch2ppm: new option -k to keep checked-out tree
- scripts/gitsch2ppm: new option -c to reuse Postscript files from -k run
- scripts/gitsch2ppm: removed C-style use of "break" from "case"
- scripts/schhist2web: use gitsch2ppm -k and -c to half number of
  eeschema runs

scripts/gitsch2ppm

@@ -40,6 +40,8 @@ usage()
     cat <<EOF 1>&2
 usage: $0 [options] top-dir top-schem [commit] outdir
 
+  -c         use cached Postscript files (from previous run, with -k)
+  -k         keep checked-out tree (for immediate reuse with -c)
   -r XxY     image resolution (default: $RES)
   -w points  Postscript line width (default: $LINEWIDTH)
 EOF
@@ -47,16 +49,20 @@ EOF
 }
 
 
+cache=false
+keep=false
 while true; do
     case "$1" in
+    -c)	cache=true
+	shift;;
+    -k)	keep=true
+	shift;;
     -r)	[ -z "$2" ] && usage
 	RES="$2"
-	shift 2
-	break;;
+	shift 2;;
     -w)	[ -z "$2" ] && usage
 	LINEWIDTH="$2"
-	shift 2
-	break;;
+	shift 2;;
     -*)
 	usage;;
     *)
@@ -84,7 +90,9 @@ fi
 tmp="$dir/../_gitsch2ppm"
 sch="$tmp/$sdir"
 
+if ! $cache; then
     rm -rf "$tmp"
+    rm -rf "$outdir"
 
     git clone -s -n "$dir/.git" "$tmp" || exit
     ( cd "$tmp" && git checkout -q "$commit"; ) || exit
@@ -95,14 +103,14 @@ if [ ! -f "$tmp/$schem" ]; then
     fi
 
     ( cd "$sch" && rm -f *.ps *.ppm && eeschema --plot "$tmp/$schem"; ) || exit
+fi
 
 for n in "$sch"/*.ps; do
     ps2ppm "$n"
 done
 
-rm -rf "$outdir"
 mkdir -p "$outdir"
 
 mv "$sch"/*.ppm "$outdir"
 
-rm -rf "$tmp"
+$keep || rm -rf "$tmp"

scripts/schhist2web

@@ -136,8 +136,8 @@ for n in $first `git rev-list --reverse $first..HEAD`; do
     if [ ! -d "$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_$n" || exit
+	gitsch2ppm -k "$dir" "$schname" $n "$cache/ppm_$n" || exit
+	gitsch2ppm -c -w 500 "$dir" "$schname" $n "$cache/fat_$n" || exit
     fi
     for m in "$cache/ppm_$n/"*; do
 	[ "$m" = "$cache/ppm_$n/*" ] && break