Merge pull request #192 from OpenVoiceOS/fix/bash_vs_dash

[installer] POSIX compliant

installer.sh

@@ -1,24 +1,24 @@
-#!/bin/env bash
+#!/bin/env sh
 
 # Set global variables based on sudo usage
 if [ -n "$SUDO_USER" ]; then
     export RUN_AS="$SUDO_USER"
 else
-    export RUN_AS=$USER
+    export RUN_AS="$USER"
 fi
 RUN_AS_HOME=$(eval echo ~"$RUN_AS")
 export RUN_AS_HOME
 
 # Check for git command to be installed
-if ! command -v git &>/dev/null; then
-    echo -e "\n\e[31m[fail]\e[0m git command not found..."
-    echo -e "       Please install git package before running the installer.\n"
+if ! command -v git >/dev/null 2>&1; then
+    printf "\n\e[31m[fail]\e[0m git command not found..."
+    printf "\n       Please install git package before running the installer.\n\n"
     exit 1
 fi
 
 # Remove ovos-installer directory if exists
 installer_path="$RUN_AS_HOME/ovos-installer"
-if [[ -d "$installer_path" ]]; then
+if [ -d "$installer_path" ]; then
     rm -rf "$installer_path"
 fi