Refactor vst-install.sh

install/vst-install.sh

@@ -2,75 +2,259 @@
 # Vesta installation wrapper
 # http://vestacp.com
 
+#
+# Style guides
+# https://google.github.io/styleguide/shell.xml
+# https://github.com/icy/bash-coding-style
+#
+
 #
 # Currently Supported Operating Systems:
 #
 #   RHEL 5, 6, 7
 #   CentOS 5, 6, 7
-#   Debian 7, 8
-#   Ubuntu 12.04 - 16.10
+#   Debian 7, 8, 9
+#   Ubuntu LTS 12.04, 14.04, 16.04
 #
 
+
+#----------------------------------------------------------#
+#                  Check system privileges                 #
+#----------------------------------------------------------#
+
 # Am I root?
 if [ "x$(id -u)" != 'x0' ]; then
-    echo 'Error: this script can only be executed by root'
-    exit 1
-fi
+  echo "Error: this script can only be executed by root";
+  exit 1;
+fi;
 
 # Check admin user account
 if [ ! -z "$(grep ^admin: /etc/passwd)" ] && [ -z "$1" ]; then
-    echo "Error: user admin exists"
-    echo
-    echo 'Please remove admin user before proceeding.'
-    echo 'If you want to do it automatically run installer with -f option:'
-    echo "Example: bash $0 --force"
-    exit 1
-fi
+  echo "Error: user admin exists";
+  echo;
+  echo "Please remove admin user before proceeding.";
+  echo "If you want to do it automatically run installer with -f option:";
+  echo "Example: bash $0 --force";
+  exit 1;
+fi;
 
 # Check admin group
 if [ ! -z "$(grep ^admin: /etc/group)" ] && [ -z "$1" ]; then
-    echo "Error: group admin exists"
-    echo
-    echo 'Please remove admin group before proceeding.'
-    echo 'If you want to do it automatically run installer with -f option:'
-    echo "Example: bash $0 --force"
-    exit 1
-fi
-
-# Detect OS
-case $(head -n1 /etc/issue | cut -f 1 -d ' ') in
-    Debian)     type="debian" ;;
-    Ubuntu)     type="ubuntu" ;;
-    *)          type="rhel" ;;
-esac
-
-# Fallback to Ubuntu
-if [ ! -e "/etc/redhat-release" ]; then
-    type='ubuntu'
-fi
-
-# Check wget
-if [ -e '/usr/bin/wget' ]; then
-    wget http://vestacp.com/pub/vst-install-$type.sh -O vst-install-$type.sh
-    if [ "$?" -eq '0' ]; then
-        bash vst-install-$type.sh $*
-        exit
-    else
-        echo "Error: vst-install-$type.sh download failed."
-        exit 1
-    fi
-fi
-
-# Check curl
-if [ -e '/usr/bin/curl' ]; then
-    curl -O http://vestacp.com/pub/vst-install-$type.sh
-    if [ "$?" -eq '0' ]; then
-        bash vst-install-$type.sh $*
-        exit
-    else
-        echo "Error: vst-install-$type.sh download failed."
-        exit 1
-    fi
-fi
-
-exit
+  echo "Error: group admin exists";
+  echo;
+  echo "Please remove admin group before proceeding.";
+  echo "If you want to do it automatically run installer with -f option:";
+  echo "Example: bash $0 --force";
+  exit 1;
+fi;
+
+
+#----------------------------------------------------------#
+#                 Check system information                 #
+#----------------------------------------------------------#
+
+# Lookup /etc/os-release file on systemd and newer distros
+if [ -r "/etc/os-release" ]; then
+  source  /etc/os-release;
+  os=$ID;
+  release=$(echo $VERSION_ID | cut -d . -f 1);
+  # Get codename from variable or from other sources
+  if [ -n "$VERSION_CODENAME" ]; then
+    codename=$VERSION_CODENAME;
+  else
+    case $os in
+      debian)
+        codename=$(awk -F"[)(]+" '/VERSION=/ {print $2}' /etc/os-release);
+        ;;
+      ubuntu)
+        codename=$(echo "${VERSION/*, /}" | awk '{print $1}' | tr '[:upper:]' '[:lower:]');
+        ;;
+      centos|rhel)
+        codename="${os}$release";
+        ;;
+    esac;
+  fi;
+
+# Lookup lsb_release binary on newer distros
+elif [ type lsb_release >/dev/null 2>&1 ]; then
+  os=$(lsb_release -si);
+  release=$(lsb_release -sr | cut -d . -f 1);
+  codename=$(lsb_release -sc);
+
+# Lookup /etc/lsb-release file on Ubuntu based distros
+elif [ -r "/etc/lsb-release" ]; then
+  source  /etc/lsb-release;
+  os=$($DISTRIB_ID | tr '[:upper:]' '[:lower:]');
+  release=$(echo $DISTRIB_RELEASE | cut -d . -f 1);
+  codename=$($DISTRIB_CODENAME | tr '[:upper:]' '[:lower:]');
+
+# Lookup /etc/system-release file on newer Red Hat based distros
+elif [ -r "/etc/system-release" ]; then
+  os=$(cut -f 1 -d ' ' /etc/system-release | tr '[:upper:]' '[:lower:]');
+  release=$(grep -o "[0-9]" /etc/system-release | head -n 1);
+  codename="${os}$release";
+
+# Lookup /etc/redhat-release file on older Red Hat based distros
+elif [ -r "/etc/redhat-release" ]; then
+  os=$(cut -f 1 -d ' ' /etc/redhat-release | tr '[:upper:]' '[:lower:]');
+  release=$(grep -o "[0-9]" /etc/redhat-release | head -n 1);
+  codename="${os}$release";
+
+# Unknown system
+else
+  echo "Error: could not detect system or distribution";
+  exit 1;
+fi;
+
+# Validate distribution, release codename and set type
+printf "\nDetected distribution ${os} ${release} (${codename})\n";
+case $os in
+  debian)
+    type="debian";
+    supported_releases=("7 8 9");
+    supported_codenames=("wheezy jessie stretch");
+    ;;
+
+  ubuntu)
+    type="ubuntu";
+    supported_releases=("12 14 16");
+    supported_codenames=("precise trusty xenial");
+    ;;
+
+  centos)
+    type="rhel";
+    supported_releases=("5 6 7");
+    supported_codenames=("centos5 centos6 centos7");
+    ;;
+
+  rhel)
+    type="rhel";
+    supported_releases=("5 6 7");
+    supported_codenames=("rhel5 rhel6 rhel7");
+    ;;
+
+  *)
+    printf "\nUnsupported distribution\n";
+    exit 1;
+    ;;
+esac;
+if [[ ! " ${supported_releases[@]} " =~ " ${release} " ]]; then
+  printf "\nUnsupported distribution release\n";
+  exit 1;
+fi;
+if [[ ! " ${supported_codenames[@]} " =~ " ${codename} " ]]; then
+  printf "\nUnsupported distribution codename\n";
+  exit 1;
+fi;
+
+
+#----------------------------------------------------------#
+#               Install minimum requirements               #
+#----------------------------------------------------------#
+
+# Debian and Ubuntu \
+if [ "$os" == "debian" ] || [ "$os" == "ubuntu" ]; then \
+  printf "Installing minimum requirements...\n" && \
+  \
+  printf "Disable installation of optional apt packages...\n" && \
+  printf "\n# Disable recommended and suggested packages\n\
+APT::Install-Recommends "\""false"\"";\n\
+APT::Install-Suggests "\""false"\"";\n\
+\n" >> /etc/apt/apt.conf && \
+  \
+  # Fix Debian repository configuration \
+  if [ "$os" == "debian" ]; then \
+    printf "Enable contrib and non-free components in debian repositories...\n" && \
+    sed -i "s>main contrib non-free>main>" /etc/apt/sources.list; \
+    sed -i "s>main>main contrib non-free>" /etc/apt/sources.list; \
+  fi && \
+  \
+  printf "Refresh the package manager...\n" && \
+  apt-get update && \
+  \
+  printf "Install the package manager packages...\n" && \
+  apt-get install -qy \
+    apt-utils apt-transport-https && \
+  \
+  printf "Install the selected packages...\n" && \
+  apt-get install -qy \
+    dialog debianutils sed grep wget curl \
+    gnupg gpgv dirmngr openssl ca-certificates && \
+  \
+  printf "Finished installing minimum requirements...\n"; \
+  \
+# CentOS and RHEL \
+elif [ "$os" == "centos" ] || [ "$os" == "rhel" ]; then \
+  # Fix CentOS 5 repository configuration \
+  if [ "$os" == "centos" ] && [ "$release" == "5" ]; then \
+    mkdir -p /var/cache/yum/{base,extras,updates,centosplus} && \
+    echo "http://vault.centos.org/5.11/os/x86_64/" > /var/cache/yum/base/mirrorlist.txt && \
+    echo "http://vault.centos.org/5.11/extras/x86_64/" > /var/cache/yum/extras/mirrorlist.txt && \
+    echo "http://vault.centos.org/5.11/updates/x86_64/" > /var/cache/yum/updates/mirrorlist.txt && \
+    echo "http://vault.centos.org/5.11/centosplus/86_64/" > /var/cache/yum/centosplus/mirrorlist.txt && \
+    sed -i '/\libselinux\]/,/^ *\[/ s/enabled=1/enabled=0/' /etc/yum.repos.d/libselinux.repo; \
+  fi && \
+  \
+  printf "Installing minimum requirements...\n" && \
+  \
+  printf "Refresh the package manager...\n" && \
+  rpm --rebuilddb && yum makecache && \
+  \
+  printf "Install the package manager packages...\n" && \
+  if [ "$os" == "centos" ] && [ "$release" != "5" ]; then \
+    yum install -y \
+      yum-plugin-fastestmirror yum-plugin-priorities \
+      yum-plugin-keys yum-utils; \
+  elif [ "$os" == "centos" ] && [ "$release" == "5" ]; then \
+    yum install -y \
+      yum-utils; \
+  fi && \
+  \
+  printf "Install the selected packages...\n" && \
+  if [ "$os" == "centos" ] && [ "$release" != "5" ]; then \
+    yum install -y \
+      dialog which sed grep wget curl \
+      gnupg openssl ca-certificates; \
+  elif [ "$os" == "centos" ] && [ "$release" == "5" ]; then \
+    yum downgrade -y libselinux && \
+    yum install -y \
+      dialog which sed grep wget curl \
+      gnupg openssl; \
+  fi && \
+  \
+  # Fix CentOS 5 certificates \
+  #if [ "$os" == "centos" ] && [ "$release" == "5" ]; then \
+  #  wget --no-check-certificate --secure-protocol=TLSv1 http://curl.haxx.se/ca/cacert.pem -O /etc/pki/tls/certs/ca-bundle.crt; \
+  #fi && \
+  \
+  printf "Finished installing minimum requirements...\n"; \
+fi;
+
+
+#----------------------------------------------------------#
+#                     Execute installer                    #
+#----------------------------------------------------------#
+
+# Donwload installer if it does not exist or is not readable \
+if [ ! -r "vst-install-$type.sh" ]; then \
+  # Look for wget \
+  if [ -e "/usr/bin/wget" ]; then \
+    wget http://vestacp.com/pub/vst-install-$type.sh -O vst-install-$type.sh; \
+  # Look for curl \
+  elif [ -e "/usr/bin/curl" ]; then \
+    curl -O http://vestacp.com/pub/vst-install-$type.sh; \
+  else \
+    echo "Error: Could not find wget or curl to download installer."; \
+  fi; \
+fi;
+
+# Check if installer exists and is readable \
+if [ -r "vst-install-$type.sh" ]; then \
+  chmod +x vst-install-$type.sh && \
+  source vst-install-$type.sh; \
+else \
+  echo "Error: vst-install-$type.sh download failed." && \
+  exit 1; \
+fi;
+
+exit;