#!/bin/bash
# gsu -- the global subcommand utility
-# (C) 2006-2009 Andre Noll
+# (C) 2006-2010 Andre Noll
_gsu_init_errors()
{
GSU_SUCCESS success
E_GSU_BAD_COMMAND invalid command
E_GSU_NOT_A_NUMBER not a number
-E_GSU_SOURCE error in config file
-E_GSU_CONFIG bad/missing config file option
E_GSU_BAD_CONFIG_VAR invalid config variable
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
+E_GSU_EDITOR failed to execute editor
+E_GSU_MKDIR failed to create directory
+E_GSU_GETOPTS getopts error
$gsu_errors
"
local a b i=0
export gsu_prefs_txt="
Print the current preferences.
-Usage: prefs
+Usage: prefs [-e]
-Print out a list of all cmt config variables, together with their current value
-and the default value."
+If -e is given, the config file is opened with the default editor. Without
+options, the command prints out a list of all cmt config variables, together
+with their current value and the default value."
_com_prefs()
{
- local i
+ local i conf="${gsu_config_file:=$HOME/.$gsu_name.rc}"
+
+ if [[ "$1" = "-e" ]]; then
+ ret=-$E_GSU_MKDIR
+ result="${conf%/*}"
+ mkdir -p "$result"
+ [[ $? -ne 0 ]] && return
+ ret=-$E_GSU_EDITOR
+ result="${EDITOR:-vi}"
+ "$result" "$conf"
+ [[ $? -ne 0 ]] && return
+ ret=$GSU_SUCCESS
+ return
+ fi
for ((i=0; i < ${#gsu_options[@]}; i++)); do
local name= option_type= default_value= required=
fi
ret=$GSU_SUCCESS
if grep -q "^com_$1()" $0; then
- sed -e "1,/com_$1()/d" -e '/^{/,$d' -e 's/^## *//' $0
+ sed -e "1,/^com_$1()$/d" -e '/^{/,$d' -e 's/^## *//' $0
return
fi
_gsu_print_available_commands
}
export -f _gsu_check_options
-gsu()
+# Wrapper for bash's getopts.
+#
+# Aborts on programming errors such as missing or invalid option string. On
+# success $result contains shell code that can be eval'ed. For each defined
+# option x, the local variable o_x will be created when calling eval "$result".
+# o_x contains true/false for options without an argument or the emtpy string/the
+# given argument, depending on whether this option was contained in the "$@"
+# array.
+#
+# Example:
+# gsu_getopts abc:x:y
+# eval "$result"
+# [[ $ret -lt 0 ]] && return
+#
+# [[ "$o_a" = "true ]] && echo "The -a flag was given"
+# [[ -n "$o_c" ]] && echo "The -c option was given with arg $o_c"
+gsu_getopts()
{
- local i
+ local i c tab=' ' cr='
+'
- gsu_is_a_number "${BASH_VERSINFO[0]}"
+ gsu_check_arg_count $# 1 1
if [[ $ret -lt 0 ]]; then
- gsu_msg "fatal: failed to determine bash version"
+ gsu_err_msg
exit 1
fi
- if [[ "${BASH_VERSINFO[0]}" -lt 4 ]]; then
- gsu_msg "fatal: This script requires at least bash 4.0"
+ ret=-$E_GSU_GETOPTS
+ result="invalid optstring $1"
+ if [[ -z "$1" || "$1" =~ "::" ]]; then
+ gsu_err_msg
exit 1
fi
+
+ for ((i=0; i < ${#1}; i++)); do
+ c=${1:$i:1}
+ case "$c" in
+ [a-zA-Z:]);;
+ *)
+ ret=-$E_GSU_GETOPTS
+ result="invalid character $c in optstring"
+ gsu_err_msg
+ exit 1
+ esac
+ done
+ result="local opt"
+ for ((i=0; i < ${#1}; i++)); do
+ c1=${1:$i:1}
+ c2=${1:$(($i + 1)):1}
+ result+=" o_$c1"
+ if [[ "$c2" = ":" ]]; then
+ let i++
+ else
+ result+="=false"
+ fi
+ done
+ result+="
+ OPTIND=1
+ while getopts $1 opt \"\$@\"; do
+ case \"\$opt\" in
+"
+ for ((i=0; i < ${#1}; i++)); do
+ c1=${1:$i:1}
+ c2=${1:$(($i + 1)):1}
+ result+="$tab$tab$c1) o_$c1="
+ if [[ "$c2" = ":" ]]; then
+ result+="\"\$OPTARG\""
+ let i++
+ else
+ result+="true"
+ fi
+ result+=";;$cr"
+ done
+ result+="
+ *)
+ ret=-\$E_GSU_GETOPTS
+ result=\"invalid option given\"
+ return
+ ;;
+ esac
+ done
+ shift \$((\$OPTIND - 1))
+"
+ ret=$GSU_SUCCESS
+}
+export -f gsu_getopts
+
+gsu()
+{
+ local i
_gsu_self="$(basename $0)"
gsu_name="${gsu_name:=$_gsu_self}"
gsu_config_var_prefix="${gsu_config_var_prefix:=$gsu_name}"
for i in $gsu_cmds; do
if test "$arg" = "$i"; then
com_$arg "$@"
- if test $ret -lt 0; then
+ if [[ "$ret" -lt 0 ]]; then
gsu_err_msg
exit 1
fi
projects / gsu.git / blobdiff