sunzi.sh in sunzi-1.0.0

- old
+ new
@@ -1,6 +1,47 @@
-# This file is used to define functions under the sunzi:: namespace.
+# This file is used to define functions under the sunzi.* namespace.
 
-function sunzi::silencer() {
+# Set $sunzi_pkg to "aptitude" or "yum", or abort.
+#
+if which aptitude >/dev/null 2>&1; then
+  export sunzi_pkg=aptitude
+elif which yum >/dev/null 2>&1; then
+  export sunzi_pkg=yum
+fi
+
+if [ "$sunzi_pkg" = '' ]; then
+  echo 'sunzi only supports aptitude and yum!' >&2
+  exit 1
+fi
+
+# Mute STDOUT and STDERR
+#
+function sunzi.mute() {
   echo "Running \"$@\""
-  eval "$@ > /dev/null 2>&1"
+  `$@ >/dev/null 2>&1`
+  return $?
+}
+
+# Installer
+#
+function sunzi.installed() {
+  if [ "$sunzi_pkg" = 'aptitude' ]; then
+    dpkg -s $@ >/dev/null 2>&1
+  elif [ "$sunzi_pkg" = 'yum' ]; then
+    rpm -qa | grep $@ >/dev/null
+  fi
+  return $?
+}
+
+function sunzi.install() {
+  for name in $@
+  do
+    if sunzi.installed "$name"; then
+      echo "$name already installed"
+      return 1
+    else
+      echo "No packages found matching $name. Installing..."
+      sunzi.mute "$sunzi_pkg -y install $name"
+      return 0
+    fi
+  done
 }