Add a few automated tests.

.travis.yml

@@ -0,0 +1 @@
+script: sh tests.sh

tests.sh

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+UPSTREAM=https://github.com/larsbrinkhoff/awesome-cpus
+MAX_DIR_SIZE=27000
+
+error() {
+    echo
+    echo "ERROR: $1"
+    exit 1
+}
+
+test_directory_size() {
+    echo -n "Checking that no directory is too large... "
+
+    git submodule deinit . > /dev/null
+    du -s * | while read i; do
+	set $i
+	if test "$1" -gt $MAX_DIR_SIZE; then
+	    error "The $2 directory is too large"
+	fi
+    done
+
+    echo OK
+}
+
+directories_in_commit() {
+    git show --name-only --format=format: "$1" | grep / | wc -l
+}
+
+test_commits() {
+    echo -n "Checking that each commit touches only one directory... "
+
+    git remote add github-upstream $UPSTREAM
+    git log --format="format:%H%n" origin/master..HEAD | while read i; do
+	if test `directories_in_commit "$i"` -gt 1; then
+	    h=`echo "$i" | cut -c1-7`
+	    error "Commit $h touches more than one directory."
+	fi
+    done
+    git remote remove github-upstream
+
+    echo OK
+}
+
+test_directory_size
+test_commits
+