feat: parse the config file for tessen

the config file also supports pointing rofi and wofi to their config
files which allows for context dependent usage which wasn't possible
earlier (without siginficant annoyance and having to accept arbitrary
input) when environment variables were supported

1 files changed, 78 insertions, 0 deletions

diff --git a/tessen b/tessen
index 46bb24d..c8f6799 100755
--- a/tessen
+++ b/tessen
@@ -644,6 +644,84 @@ _die() {
   exit 1
 }
 
+# this block of code is needed because we can't source the file and execute
+# arbitrary input
+parse_config() {
+  local _opt
+  while [[ "$#" -gt 0 ]]; do
+    _opt="$1"
+    case "$_opt" in
+      -c | --config)
+        if [[ "$#" -lt 2 ]] || ! [[ -s "$2" ]]; then
+          _die "please specify a valid path for the configuration file of tessen"
+        fi
+        tsn_config="$2"
+        shift
+        ;;
+      --config=*)
+        if ! [[ -s "${_opt##--config=}" ]]; then
+          _die "please specify a valid path for the configuration file of tessen"
+        fi
+        tsn_config="${_opt##--config=}"
+        ;;
+    esac
+    shift
+  done
+  unset -v _opt
+
+  local line idx key val
+  local -a config_arr
+  local config_regex='^[[:alpha:]_]+="[[:alnum:]~_.\/^$|()*?-]+"$'
+  # in case the user hasn't provided an explicit location, we'll have to check
+  # if the default file exists before we parse it
+  if [[ -s "$tsn_config" ]]; then
+    while read -r line || [[ -n "$line" ]]; do
+      if [[ "$line" == \#* ]]; then
+        continue
+      elif [[ "$line" =~ $config_regex ]]; then
+        config_arr+=("$line")
+      fi
+    done < "$tsn_config"
+    for idx in "${config_arr[@]}"; do
+      key="${idx%=*}"
+      val="${idx#*\"}"
+      val="${val%*\"}"
+      # here comes the ladder
+      if [[ "$key" == "pass_backend" ]]; then
+        validate_pass_backend "$val"
+      elif [[ "$key" == "dmenu_backend" ]]; then
+        validate_dmenu_backend "$val"
+      elif [[ "$key" == "action" ]]; then
+        validate_action "$val"
+      elif [[ "$key" == "rofi_config_file" ]] && [[ "$dmenu_backend" == "rofi" ]]; then
+        validate_dmenu_backend rofi
+        dmenu_backend_opts+=("-config $val")
+        tmp_opts+=("-config $val")
+      elif [[ "$key" == "wofi_config_file" ]] && [[ "$dmenu_backend" == "wofi" ]]; then
+        dmenu_backend_opts+=("-c $val")
+        tmp_opts+=("-c $val")
+      elif [[ "$key" == "wofi_style_file" ]] && [[ "$dmenu_backend" == "wofi" ]]; then
+        dmenu_backend_opts+=("-s $val")
+        tmp_opts+=("-s $val")
+      elif [[ "$key" == "wofi_color_file" ]] && [[ "$dmenu_backend" == "wofi" ]]; then
+        dmenu_backend_opts+=("-C $val")
+        tmp_opts+=("-C $val")
+      elif [[ "$key" == "userkey" ]]; then
+        tsn_userkey="$val"
+      elif [[ "$key" == "urlkey" ]]; then
+        tsn_urlkey="$val"
+      elif [[ "$key" == "autotype_key" ]]; then
+        tsn_autokey="$val"
+      elif [[ "$key" == "delay" ]]; then
+        tsn_delay="$val"
+      elif [[ "$key" == "web_browser" ]] && is_installed "$val"; then
+        tsn_web_browser="$val"
+      fi
+    done
+  fi
+  unset -v line key val idx config_arr config_regex
+}
+
 main() {
   local _opt