minor fixes in shell scripts

packaging/build_deb.sh

@@ -4,9 +4,10 @@ set -e
 
 if test ! -r "$HOME/.devscripts"; then
 	echo "$HOME/.descripts must exist"
+	exit 1
 fi
 
-cd `dirname "$0"`/..
+cd "$(dirname "$0")/.."
 DEBIAN_FILES="$PWD/packaging/debian"
 DIST="$PWD/dist/${DISTRIBUTION:=debian}"
 
@@ -16,7 +17,8 @@ mkdir -m 0700 -p "$BUILD_DIR"
 python "setup.py" sdist --dist-dir="$BUILD_DIR" --formats=gztar
 
 cd "$BUILD_DIR"
-S=`ls -1 solaar-*.tar.gz`
+S=$(ls -1 solaar-*.tar.gz | head -n 1)
+test -r "$S"
 VERSION=${S#solaar-}
 VERSION=${VERSION%.tar.gz}
 tar xfz "$S"

packaging/build_ppa.sh

@@ -2,7 +2,7 @@
 
 set -e
 
-cd `dirname "$0"`/..
+cd "$(dirname "$0")/.."
 
 DISTRIBUTION=ubuntu
 DEBIAN_FILES_EXTRA="$PWD/packaging/ubuntu"
@@ -12,7 +12,7 @@ DEBIAN_FILES_EXTRA="$PWD/packaging/ubuntu"
 DEBIAN_CHANGELOG="$PWD/packaging/debian/changelog"
 PPA_CHANGELOG="$DEBIAN_FILES_EXTRA/changelog"
 
-latest=`head -n 1 "$DEBIAN_CHANGELOG" | sed -e 's#(\([^)]*\))#(\1ppa1)#; s#UNRELEASED#precise#'`
+latest="$(head -n 1 "$DEBIAN_CHANGELOG" | sed -e 's#(\([^)]*\))#(\1ppa1)#; s#UNRELEASED#precise#')"
 cat - "$DEBIAN_CHANGELOG" > "$PPA_CHANGELOG" <<_CHANGELOG
 $latest
 

tools/clean.sh

@@ -0,0 +1,5 @@
+#!/bin/sh
+
+cd "$(dirname "$0")/.."
+find . -type f -name '*.py[co]' -delete
+find . -type d -name '__pycache__' -delete

tools/scan-registers.sh

@@ -5,8 +5,7 @@ if test -z "$1"; then
 	exit 2
 fi
 
-Z=`readlink -f "$0"`
-HC=`dirname "$Z"`/hidconsole
+HC="$(dirname "$(readlink -f "$0")")/hidconsole"
 
 z='0 1 2 3 4 5 6 7 8 9 a b c d e f'