Add script for generating setup summary for troubleshooting support

docs/troubleshooting/README.md

@@ -47,6 +47,9 @@ You can inspect a failing [AliHyperloop test](../hyperloop/userdocumentation.md#
 
 See the [Support](../gettingstarted/support.md) section for the list of Mattermost channels where you can ask for help.
 
+When asking for help with compilation or with running a local analysis, it may be useful to provide basic information about your O2Physics setup.
+You can generate it by running the [`summarise_o2p_setup.sh`](summarise_o2p_setup.sh) bash script in your `alice` directory.
+
 When posting on Mattermost:
 
 - Do not paste the entire content of files or any long blocks of log lines or code directly in the message. If needed, attach the file.

docs/troubleshooting/summarise_o2p_setup.sh

@@ -0,0 +1,22 @@
+#!/bin/bash
+
+# Summarise O2Physics setup
+
+if [[ -n "$(which aliBuild)" ]]; then
+  echo "aliBuild location: $(which aliBuild)"
+  # echo "all aliBuild locations: $(whereis aliBuild)"
+  aliBuild version
+else
+  echo "aliBuild not found."
+fi
+
+for repo in alidist O2 O2Physics; do
+  [[ -d "${repo}" ]] || { echo "Directory ${repo} not found."; continue; }
+  echo "Last commit of ${repo}: $(cd "${repo}" && git log -n 1 --pretty="format:%ci %h")"
+done
+
+for pkg in O2 O2Physics; do
+  log="$ALIBUILD_WORK_DIR/BUILD/${pkg}-latest/log"
+  [[ -f "${log}" ]] || { echo "Log file ${log} not found."; continue; }
+  echo "Last build of ${pkg}: $(stat -c "%y" "${log}")"
+done