[pams] improve installation

pams

@@ -24,6 +24,17 @@ err_add_args() {
     exit 1
 }
 
+audit() {
+    less "$aur"/"$1"/PKGBUILD
+}
+
+download() {
+    mkdir "$aur" 2>/dev/null
+    cd "$aur" || exit
+    echo downloading "$1"
+    git clone https://aur.archlinux.org/"$1".git 2>/dev/null
+    audit "$1"
+}
 
 # main program
 
@@ -42,29 +53,23 @@ else
     -a)     if [ $# -ne 2 ]; then
                 err_add_args
             else
-                less "$aur"/"$2"/PKGBUILD
+                audit "$2"
             fi
             ;;
 
     -d)     if [ $# -ne 2 ]; then
                 err_add_args
             else
-                originaldir="$(pwd)"
-                mkdir "$aur" 2>/dev/null
-                cd "$aur" || exit
-                git clone https://aur.archlinux.org/"$2".git
-                less "$aur"/"$2"/PKGBUILD
-                cd "$originaldir" || exit
+                download "$2"
             fi
             ;;
 
     -i)     if [ $# -ne 2 ]; then
                 err_add_args
             else
-                originaldir="$(pwd)"
-                                cd "$aur"/"$2" || exit
+                cd "$aur"/"$2" 2>/dev/null || (echo "package not downloaded" && download "$2")
+                cd "$aur"/"$2"
                 makepkg -si
-                cd "$originaldir" || exit
             fi
             ;;