add CI detection

src/entry.sh

···
 
 ### Combination
 
+_ci="$(atfile.util.get_ci)"
 _command="$1"
 _command_args=("${@:2}")
 _os="$(atfile.util.get_os)"
···
 _path_blobs_tmp="$_path_blobs_tmp/at-blobs"
 _path_cache="$_path_cache/atfile"
 _path_envvar="$(atfile.util.get_envvar "${_envvar_prefix}_PATH_CONF" "$_path_envvar/$_file_envvar")" 
+
+## CI detection
+
+atfile.say.debug "Detected CI: $_ci"
 
 ## OS detection
 

src/shared/util.sh

···
     echo "$cdn_uri"
 }
 
+function atfile.util.get_ci() {
+    [[ -d "/tangled/workspace" ]] && echo "tangled"
+}
+
 # TODO: Support BusyBox's shit `date` command
 #       `date -u +"$format" -s "1996-08-11 01:23:34"`
 function atfile.util.get_date() {