Fix install script

install.sh

@@ -11,26 +11,6 @@ set -o nounset
 DOTDIR="/var/lib/dotfiles"
 _SCRIPT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
 
-[[ -e './.git' ]] && git submodule update --init
-
-if [[ "$(readlink "${_SCRIPT_DIR}")" != "${DOTDIR}" ]] && [[ "${_SCRIPT_DIR}" != "${DOTDIR}" ]] ; then
-    if [[ -e "${DOTDIR}" ]] ; then
-        2>&1 printf "${DOTDIR} already exists. This seems unsafe.\n"
-        exit 1
-    fi
-    printf "Moving directory to $DOTDIR ...\n"
-    sudo=""
-    if (( $(id -u ) != 0 )) ; then
-        sudo=sudo
-    fi
-    $sudo mv --no-target-directory "${_SCRIPT_DIR}" "${DOTDIR}"
-    printf "Done\n"
-else
-    printf "Already working in ${DOTDIR}, nothing to do\n"
-fi
-
-cd "${DOTDIR}"
-
 os_release_file=/etc/os-release
 if [[ ! -e "${os_release_file}" ]] ; then
     2>&1 printf "Could not find ${os_release_file}, exiting"
@@ -51,7 +31,11 @@ cache_updated=0
 _install() {
     _package="$1" ; shift
     if [[ $NAME == "Arch Linux" ]] ; then
-        sudowrap pacman -S --noconfirm "${_package}"
+        if (( ! cache_updated )) ; then
+            sudowrap pacman -Sy
+            cache_updated=1
+        fi
+        sudowrap pacman -S --needed --noconfirm "${_package}"
     else
         2>&1 printf "Unsupported distro $NAME, exiting"
         exit 1
@@ -80,4 +64,24 @@ if [[ $NAME == "Arch Linux" ]] ; then
     _install "ansible"
 fi
 
+[[ -e './.git' ]] && git submodule update --init
+
+if [[ "$(readlink "${_SCRIPT_DIR}")" != "${DOTDIR}" ]] && [[ "${_SCRIPT_DIR}" != "${DOTDIR}" ]] ; then
+    if [[ -e "${DOTDIR}" ]] ; then
+        2>&1 printf "${DOTDIR} already exists. This seems unsafe.\n"
+        exit 1
+    fi
+    printf "Moving directory to $DOTDIR ...\n"
+    sudo=""
+    if (( $(id -u ) != 0 )) ; then
+        sudo=sudo
+    fi
+    $sudo mv --no-target-directory "${_SCRIPT_DIR}" "${DOTDIR}"
+    printf "Done\n"
+else
+    printf "Already working in ${DOTDIR}, nothing to do\n"
+fi
+
+cd "${DOTDIR}"
+
 cd "$DOTDIR" && make