Merge pull request #8 from carterpeel/main

Added logging facility & non-builtin package sanity checks

centos2rocky.sh

@@ -1,17 +1,30 @@
-#!/bin/bash
+#!/usr/bin/env bash
 # label <label@rockylinux.org>
 # Supports only CentOS 8.3
 
 ## Rocky is RC status. Using this script means you accept all risks of system instability.
 
+(
+# Pass everything to a subshell so the output can be piped to /var/log/centos2rocky.log
+
 set -e
 unset CDPATH
 
-if [ "$(id -u)" -ne 0 ]; then
+if [[ "$(id -u)" -ne 0 ]]; then
   echo "You must run this script as root."
   echo "Either use sudo or 'su -c ${0}'"
 fi
 
+if [[ "$(wget 2>/dev/null || echo $?)" == 127 ]]; then
+  echo "Wget is not installed! Installing it..."
+  dnf -y install wget
+fi
+
+if [[ "$(curl 2>/dev/null || echo $?)" == 127 ]]; then
+  echo "Curl is not installed! Installing it..."
+  dnf -y install curl libcurl
+fi
+
 export LANG=en_US.UTF-8
 
 SUPPORTED_RELEASE="8.3"
@@ -59,6 +72,11 @@ exit_message() {
 
 final_message() {
   echo "An error occurred while we were attempting to convert your system to Rocky Linux. Your system may be unstable. Script will now exit to prevent possible damage."
+  logmessage
+}
+
+logmessage(){
+echo "A log of this installation can be found at /var/log/centos2rocky.log"
 }
 
 ## The actual work
@@ -69,6 +87,7 @@ bin_hash() {
 bin_check() {
   if ! bin_hash "$1"; then
     exit_message "'${1}' command not found. Please ensure you are running bash or that your PATH is set correctly."
+    logmessage
   fi
 }
 
@@ -85,7 +104,7 @@ package_swaps() {
   pushd /root/release
 
   for x in "${release_to_install[@]}"; do
-    wget -q "${current_url}/${x}" || { echo "failed to download ${x}" ; exit 20; }
+    wget -q "${current_url}/${x}" || { echo "failed to download ${x}" && logmessage ; exit 20; }
   done
 
   # Remove packages we need to swap
@@ -103,7 +122,9 @@ package_swaps() {
     dnf distro-sync -y
   else
     exit_message "We failed to install the release package."
+    logmessage
   fi
+
   popd
 }
 
@@ -130,7 +151,8 @@ module_check() {
     select yn in "Yes" "No"; do
       case $yn in
         Yes)
-          echo "Ensure how to switch modules, so we are leaving."
+          echo "Unsure how to switch modules, so we are leaving."
+          logmessage
           exit 1
           ;;
         No)
@@ -151,6 +173,7 @@ module_fix() {
         ;;
       *)
         echo "Unsure how to deal with the module presented."
+        logmessage
         ;;
       esac
     # Final update
@@ -158,6 +181,7 @@ module_fix() {
   done
 }
 
+
 ## End actual work
 
 while getopts "hrVR" option; do
@@ -189,14 +213,17 @@ done
 echo "Ensuring your version of CentOS is supported"
 if ! old_release=$(rpm -q --whatprovides /etc/redhat-release); then
   exit_message "You are not running a supported distribution."
+  logmessage
 fi
 
 if [ "$(echo "${old_release}" | wc -l)" -ne 1 ]; then
   exit_message "You seem to have package issues. More than one package provides redhat-release."
+  logmessage
 fi
 
 if ! grep ${SUPPORTED_RELEASE} -q /etc/redhat-release; then
   exit_message "${SUPPORTED_RELEASE} is only supported for conversion at this time. Stream is not supported."
+  logmessage
 fi
 
 if "${verify_all_rpms}"; then
@@ -207,9 +234,11 @@ case "${old_release}" in
   centos-linux-release*);;
   rocky-release*)
     exit_message "You are already running Rocky."
+    logmessage
     ;;
   *)
     exit_message "You are running an unsupported distribution. Good bye."
+    logmessage
 esac
 
 # Check our modules before a swap
@@ -243,3 +272,7 @@ if "${verify_all_rpms}"; then
 fi
 
 echo "Done, please reboot your system."
+logmessage
+
+) | tee /var/log/centos2rocky.log
+# Pipe output to /var/log/centos2rocky.log