Initial version: basic CLI

.gitignore

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+*~

args.sh

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+##
+## crdp argument parsing functions
+##
+
+function args-print-version {
+    echo "$0 version $VERSION"
+    exit 0
+}
+
+function args-print-help {
+    echo "usage: $0 <command> [<args>]"
+    echo -e "\tCOMMAND\t\t\t\tDESCRIPTION"
+    for cmd in "${!ACTIONS[@]}"
+    do
+        cmdhelp=${ACTIONS_HELP[$cmd]}
+        echo -e "\t$cmd\t\t\t\t$cmdhelp"
+    done
+}
+
+# register actions provided by this file
+ACTIONS[help]=args-print-help
+ACTIONS_HELP[help]="prints this help message"
+ACTIONS[version]=args-print-version
+ACTIONS_HELP[version]="prints the version string"
+
+# below is mostly a blatant copy of https://stackoverflow.com/questions/192249/how-do-i-parse-command-line-arguments-in-bash
+
+getopt --test > /dev/null
+if [[ $? -ne 4 ]]; then
+    echo "You need getopt installed to use crdp. `getopt --test` failed."
+    exit 1
+fi
+
+# using : means that option has a value (e.g. --verbosity 2)
+ARGS_OPTIONS=
+ARGS_LONGOPTIONS=
+
+# -temporarily store output to be able to check for errors
+# -e.g. use “--options” parameter by name to activate quoting/enhanced mode
+# -pass arguments only via   -- "$@"   to separate them correctly
+ARGS_PARSED=$(getopt --options=$ARGS_OPTIONS --longoptions=$ARGS_LONGOPTIONS --name "$0" -- "$@")
+if [[ $? -ne 0 ]]; then
+    # e.g. $? == 1
+    #  then getopt has complained about wrong arguments to stdout
+    exit 2
+fi
+
+# read getopt’s output this way to handle the quoting right:
+eval set -- "$ARGS_PARSED"
+
+# now enjoy the options in order and nicely split until we see --
+while true; do
+    case "$1" in
+        # -d|--debug)
+        #     d=y
+        #     shift
+        #     ;;
+        # -f|--force)
+        #     f=y
+        #     shift
+        #     ;;
+        # -v|--verbose)
+        #     v=y
+        #     shift
+        #     ;;
+        # -o|--output)
+        #     outFile="$2"
+        #     shift 2
+        #     ;;
+        --)
+            shift
+            break
+            ;;
+        *)
+            echo "Programming error"
+            exit 3
+            ;;
+    esac
+done
+
+# handle non-option arguments
+if [[ $# -ne 1 ]]; then
+    args-print-help    
+    exit 4
+fi
+
+# read command into variable and shift $1 into first argument
+COMMAND="$1"
+shift

cfg.sh

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+##
+## crp configuration related functions
+##
+
+function cfg-create-file {
+    # creates config dir if not exists
+    [[ -d $CONFIG_DIR  ]] || mkdir -p $CONFIG_DIR
+
+    # creates config file if not exists
+    if [[ ! -f $CONFIG_PATH ]]
+    then
+        echo $1 
+        cat > "$CONFIG_PATH" <<EOF
+[general]
+use_secret_tool=1
+EOF
+    fi
+}
+
+# cfg_get <section> <variable> prints the variable's value
+# cfg_get <secion> reads all variable lines under <section> and prefix them with cfg_<section>_
+function cfg-get {    
+    # when you forget how you did this:
+    # https://stackoverflow.com/questions/3717772/regex-grep-for-multi-line-search-needed
+    # https://unix.stackexchange.com/questions/13466/can-grep-output-only-specified-groupings-that-match
+    # because -z replaces $ with \0 and bash warns when it is on the string, delete it with tr
+    [[ ! -z $2 ]] && grep -Poz '(?s).*?\['$1'\].*?'$2'=\K\N*' $CONFIG_PATH | tr -d '\0' \
+            || grep -Poz '(?s).*?\['$1'\]\n\K.*?(?=$|\[)' $CONFIG_PATH | tr '\0' '\n' | grep '=' | sed 's/^\(.*\)$/cfg_'$1'_\1/'
+}
+
+# cfg_read_section <section>
+# populate variables cfg_<section>_<varname> with variable values
+function cfg-read-section {
+    local vals=$(cfg-get $1)
+    # eval will byte me later, this needs fixing
+    eval "$vals"
+}

crdp

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+crdp.sh

crdp.sh

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+#_CONFIG_PATH=~/.local/share/crdp.cfg
+_CONFIG_PATH=crdp.cfg
+CONFIG_PATH=$(realpath $_CONFIG_PATH)
+CONFIG_DIR=$(dirname $CONFIG_PATH)
+VERSION=0.0.1
+
+# ACTIONS is a map between command and function that performs that action
+# ACTIONS_HELP is the help text printed when someone types help
+declare -A ACTIONS
+declare -A ACTIONS_HELP
+
+# source functions
+. cfg.sh
+
+# parse options and put command into $COMMAND and arguments into $*
+. args.sh
+
+# creates config file if not exists
+cfg-create-file
+
+# parses the general config section
+cfg-read-section general
+
+# grap function that operates on that command
+action=${ACTIONS[$COMMAND]}
+
+[[ -z "$action" ]] && { echo "unknown command $COMMAND"; echo "type '$0 help' for help"; exit 5; } || $action $*
+
+exit 0