Move all files to the top level directory.

[gsu.git] / config

diff --git a/config b/config
new file mode 100644 (file)
index 0000000..09330f3
--- /dev/null
+++ b/config
@@ -0,0 +1,85 @@
+#!/bin/bash
+
+# Syntactically check the gsu_options array for errors and parse the config
+# file.
+gsu_check_options()
+{
+       local i conf="${gsu_config_file:=${HOME:-}/.$gsu_name.rc}" val
+
+       for ((i=0; i < ${#gsu_options[@]}; i++)); do
+               eval "${gsu_options[$i]}"
+               eval val='"'\${${name}:-}'"'
+               eval orig_${gsu_config_var_prefix}_$name='"'${val}'"'
+       done
+
+       [[ -r "$conf" ]] && source "$conf"
+
+       for ((i=0; i < ${#gsu_options[@]}; i++)); do
+               local name= option_type= default_value= required=
+               local description= help_text=
+               local val orig_val
+
+               eval "${gsu_options[$i]}"
+
+               # Check name. It must be non-empty and consist of [a-zA-Z_0-9]
+               # only.  Moreover it must not start with [a-zA-Z].
+               ret=-$E_GSU_BAD_CONFIG_VAR
+               result="name: '$name'"
+               # bash's =~ works only for 3.2 and newer, so use grep
+               echo "$name" | grep '^[a-zA-Z][a-zA-Z_0123456789]*$' &> /dev/null;
+               [[ $? -ne 0 ]] && return
+
+               eval orig_val='"'\$orig_${gsu_config_var_prefix}_$name'"'
+               if [[ -z "$orig_val" ]]; then
+                       eval val='"'\${$name:-}'"'
+               else
+                       val="$orig_val"
+               fi
+               case "$required" in
+               true|yes)
+                       ret=-$E_GSU_NEED_VALUE
+                       result="$name"
+                       [[ -z "$val" ]] && return
+                       ;;
+               false|no)
+                       ;;
+               *)
+                       ret=-$E_GSU_BAD_BOOL
+                       result="required: $required, name: $name, val: $val"
+                       return
+               esac
+
+               eval ${gsu_config_var_prefix}_$name='"'\${val:="$default_value"}'"'
+               # Check option type. ATM, only num and string are supported
+               # Other types may be added without breaking compatibility
+               case "$option_type" in
+               string)
+                       ;;
+               num)
+                       gsu_is_a_number "$val"
+                       [[ $ret -lt 0 ]] && return
+                       ;;
+               *)
+                       ret=-$E_GSU_BAD_OPTION_TYPE
+                       result="$name/$option_type"
+                       return
+               esac
+       done
+       ret=$GSU_SUCCESS
+}
+
+# Call gsu_check_options(), die on errors.
+gsu_check_options_or_die()
+{
+       gsu_check_options
+       if (($ret < 0)); then
+               gsu_err_msg
+               exit 1
+       fi
+}
+
+if [[ "$(type -t _gsu_setup)" != "function" ]]; then
+       gsu_dir=${gsu_dir:=${HOME:-}/.gsu}
+       . $gsu_dir/common || exit 1
+       _gsu_setup
+fi