Add code for forming a Redis command

lib/cli.sh

@@ -0,0 +1,60 @@
+get_cmd() {
+  if (( $# )); then
+    IFS= read -ep "$(build_prompt)" "$1"
+  fi
+}
+
+parse_cmd() {
+  local cmd=( ) arg
+  declare -n serialized=$1
+
+  route_cmd "$2"
+
+  serialized=*${#cmd[@]}$'\r\n'
+  serialized+=${cmd[0]^^}
+
+  for arg in "${cmd[@]:1}"; do
+    serialized+=$arg
+  done
+}
+
+route_cmd() {
+  case $1 in
+  [[:space:]]*)
+    parse_ws "$1"
+    ;;
+  "")
+    return 0
+    ;;
+  *)
+    parse_word "$1"
+  esac
+}
+
+parse_ws() {
+  local line=$1
+
+  while (( ${#line} )) && [[ $line = [[:space:]]* ]]; do
+    line=${line:1}
+  done
+
+  route_cmd "$line"
+}
+
+parse_word() {
+  local arg line=$1
+
+  while (( ${#line} )); do
+    local next=${line:0:1}
+
+    if [[ $next != [[:space:]] ]]; then
+      arg+=$next
+      line=${line:1}
+    else
+      break
+    fi
+  done
+
+  cmd+=( "\$${#arg}"$'\r\n'"$arg"$'\r\n' )
+  route_cmd "$line"
+}

lib/net.sh

@@ -0,0 +1,13 @@
+###
+# redis sock
+###
+
+exec {sock}<>/dev/tcp/"$host"/"$port"
+
+###
+# net wrappers
+###
+
+redis_send() {
+  printf %s "$@" >&"$sock"
+}

lib/util.sh

@@ -0,0 +1,7 @@
+build_prompt() {
+  if (( table )); then
+    printf '%s:%d[%d]> ' "$host" "$port" "$table"
+  else
+    printf '%s:%d> ' "$host" "$port"
+  fi
+}

redi.sh

@@ -0,0 +1,5 @@
+shopt -s nullglob
+
+for file in "${REDISH_LIB_PATH:-.}"/lib/*.sh; do
+  . "$file"
+done

redish-cli

@@ -0,0 +1,33 @@
+#!/usr/bin/env bash
+
+###
+# defaults
+###
+
+host=127.0.0.1
+port=6379
+table=0
+
+###
+# config
+###
+
+if (( $# )); then
+  . "$1"
+  shift
+fi
+
+###
+# library
+###
+
+. "${REDISH_LIB_PATH:-.}"/redi.sh
+
+###
+# driver
+###
+
+while get_cmd line; do
+  parse_cmd redis_cmd "$line"
+  redis_send "$redis_cmd"
+done