pkgs: Add function to check for dependencies

bin/pkgs:
Add function to generically search for and fail in the abscence of
dependencies to the script (e.g. svn and git).

1 files changed, 16 insertions, 1 deletions

diff --git a/bin/pkgs b/bin/pkgs
index e8281b3..253ca91 100755
--- a/bin/pkgs
+++ b/bin/pkgs
@@ -33,7 +33,18 @@ declare -A package_dirs=(
   ["extra"]="${package_dir_base}extra"
 )
 
-# TODO: check whether git and subversion are installed
+check_dependencies() {
+  # check whether required commands are installed
+  local _commands=('svn' 'git')
+  local _command
+
+  for _command in "${_commands[@]}"; do
+    if ! command -v s > /dev/null; then
+      printf "The required command %s can not be found. Exiting...\n" "$_command"
+      exit 1
+    fi
+  done
+}
 
 create_tmp_packagelist() {
   local list_file=""
@@ -247,6 +258,7 @@ case "${mode}" in
       echo "A package must be defined for adding a package."
       exit 1
     else
+      check_dependencies
       add_package "$package"
       [ $new_package -gt 0 ] && create_package "$package"
     fi
@@ -260,10 +272,12 @@ case "${mode}" in
       echo "A package must be defined for removing a package."
       exit 1
     else
+      check_dependencies
       remove_package "$package"
     fi
     ;;
   update)
+    check_dependencies
     if [ -z "$repo" ];then
       for list in aur community core extra; do
         if [ -f "${package_lists[$list]}" ]; then
@@ -289,6 +303,7 @@ case "${mode}" in
     fi
     ;;
   clean)
+    check_dependencies
     if [ -z "$repo" ]; then
       for list in aur community core extra; do
         repo="$list"