E_GSU_NEED_VALUE value required but not given
E_GSU_BAD_BOOL bad value for boolian option
E_GSU_BAD_OPTION_TYPE invalid option type
+E_GSU_BAD_ARG_COUNT invalid number of arguments
E_NO_DEFAULT missing default value
$gsu_errors
"
}
export -f gsu_is_a_number
+# Check number of arguments.
+#
+# Usage: gsu_check_arg_count <num_given> <num1> [<num2>]
+#
+# Check that <num_given> is between <num1> and <num2> inclusively.
+# If only <num1> ist given, num2 is assumed to be infinity.
+#
+# Examples:
+# 0 0 no argument allowed
+# 1 1 exactly one argument required
+# 0 2 at most two arguments admissible
+# 2 at least two arguments reqired
+#
+gsu_check_arg_count()
+{
+ ret=-$E_GSU_BAD_ARG_COUNT
+ if [[ $# -eq 2 ]]; then # only num1 is given
+ result="at least $2 args required, $1 given"
+ [[ $1 -lt $2 ]] && return
+ ret=$GSU_SUCCESS
+ return
+ fi
+ # num1 and num2 given
+ result="need at least $2 args, $1 given"
+ [[ $1 -lt $2 ]] && return
+ result="need at most $3 args, $1 given"
+ [[ $1 -gt $3 ]] && return
+ ret=$GSU_SUCCESS
+}
+export -f gsu_check_arg_count
+
gsu_short_msg()
{
echo "$1" 1>&2
}
export -f gsu_date_msg
+
+
_gsu_banner_msg()
{
- local txt="*** $_gsu_self --"
+ local txt="### $_gsu_self --"
if test -z "$gsu_banner_txt"; then
txt="$txt set \$gsu_banner_txt to customize this message"
else
txt="$txt $gsu_banner_txt"
fi
- gsu_short_msg "$txt ***"
+ gsu_short_msg "$txt ###"
}
export -f _gsu_banner_msg
_gsu_usage()
{
- gsu_short_msg "Usage: $_gsu_self command [options]"
+ gsu_short_msg "# Usage: $_gsu_self command [options]"
}
export -f _gsu_usage
Print out a list of all cmt config variables, together with their current value
and the default value."
-com_prefs()
+_com_prefs()
{
local i
echo
done
}
-export -f com_prefs
+export -f _com_prefs
export gsu_man_txt="
Print the manual.
Usage: man"
-com_man()
+_com_man()
{
local equal_signs="=================================================="
local minus_signs="--------------------------------------------------"
done
ret=$GSU_SUCCESS
}
-export -f com_man
+export -f _com_man
export gsu_help_txt="
Print online help.
Without arguments, print the list of available commands. Otherwise,
print the help text for the given command."
-com_help()
+_com_help()
{
local a b
if test -z "$1"; then
_gsu_banner_msg 2>&1
_gsu_usage 2>&1
- # sed is magic, baby
- (printf "com_help()\n$gsu_help_txt" | head -n 4; echo "--"
- printf "com_man()\n$gsu_man_txt" | head -n 4; echo "--"
- printf "com_prefs()\n$gsu_prefs_txt" | head -n 4; echo "--"
-
- grep -A 2 "^com_\([a-zA-Z_0-9]\+\)()" $0) \
- | grep -v -- '--' \
+ {
+ printf "com_help()\n$gsu_help_txt" | head -n 4; echo "--"
+ printf "com_man()\n$gsu_man_txt" | head -n 4; echo "--"
+ printf "com_prefs()\n$gsu_prefs_txt" | head -n 4; echo "--"
+ grep -A 2 "^com_\([a-zA-Z_0-9]\+\)()" $0
+ } | grep -v -- '--' \
| sed -e '/^com_\([a-zA-Z_0-9]\+\)()/bs' \
-e 'H;$!d;x;s/\n//g;b' \
-e :s \
echo "$b"
done
echo
- echo "Try $_gsu_self help <command> for info on <command>."
+ echo "# Try $_gsu_self help <command> for info on <command>."
ret=$GSU_SUCCESS
return
fi
result="$1"
ret=-$E_GSU_BAD_COMMAND
}
-export -f com_help
+export -f _com_help
# internal gsu function that syntactically checks the gsu_options array
# for errors and parses the config file.
# only. Moreover it must not start with [a-zA-Z].
ret=-$E_GSU_BAD_CONFIG_VAR
- result="$name"
+ 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
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 "$option_type" in
{
local i
+ gsu_is_a_number "${BASH_VERSINFO[0]}"
+ if [[ $ret -lt 0 ]]; then
+ gsu_msg "fatal: failed to determine bash version"
+ exit 1
+ fi
+
+ if [[ "${BASH_VERSINFO[0]}" -lt 4 ]]; then
+ gsu_msg "fatal: This script requires at least bash 4.0"
+ exit 1
+ fi
_gsu_self="$(basename $0)"
gsu_name="${gsu_name:=$_gsu_self}"
gsu_config_var_prefix="${gsu_config_var_prefix:=$gsu_name}"
_gsu_init_errors
_gsu_check_options
if [[ "$ret" -lt 0 ]]; then
- if [[ "$1" != "help" && "$1" != "man" && "$1" != "prefs" ]]; then
+ if [[ "$1" != "help" && "$1" != "man" ]]; then
gsu_err_msg
exit 1
fi
fi
arg="$1"
shift
+ # check internal commands
+ if [[ "$arg" = "help" || "$arg" = "man" || "$arg" = "prefs" ]]; then
+ _com_$arg "$@"
+ if [[ "$ret" -lt 0 ]]; then
+ gsu_err_msg
+ exit 1
+ fi
+ exit 0
+ fi
+
+ # external commands
for i in $gsu_cmds; do
if test "$arg" = "$i"; then
com_$arg "$@"
exit 0
fi
done
+
ret=-$E_GSU_BAD_COMMAND
result="$arg"
gsu_err_msg