Fix Go version discovery on Ubuntu versions

Author: deneb-alpha

uyuni-tools.spec

@@ -83,8 +83,14 @@ BuildRequires:  golang(API) >= 1.25
 
 %if 0%{?ubuntu}
 %define go_version      1.22
+# On Ubuntu 22.04, the metapackage golang is too old (1.18) and
+# we must use the versioned package name specifically for this OS version.
+%if 0%{?ubuntu} == 2204
+BuildRequires:  golang-%{go_version}-go
+%else
 BuildRequires:  golang >= %{go_version}
 %endif
+%endif
 # ubuntu
 
 %if 0%{?debian}
@@ -324,15 +330,43 @@ go_tags=""
 
 go_path=""
 %if 0%{?ubuntu}
-  if test -d /usr/lib/go-%{go_version}/bin/; then
-    go_path=/usr/lib/go-%{go_version}/bin/
+  max_major=0
+  max_minor=0
+
+  for dir in /usr/lib/go-*/bin; do
+    if [ -x "$dir/go" ]; then
+      # Extract version string (e.g. from /usr/lib/go-1.22.1/bin to 1.22.1)
+      v_str="${dir%/bin}"
+      v_str="${v_str#/usr/lib/go-}"
+      # Get Major: Everything before the first dot
+      major="${v_str%%.*}"
+      # Get the rest: Everything after the first dot (e.g., 22.1)
+      minor_full="${v_str#*.}"
+      # Get Minor: Everything before the first dot in the 'rest' (e.g., 22)
+      minor="${minor_full%%.*}"
+      if [ "$major" -gt "$max_major" ] || { [ "$major" -eq "$max_major" ] && [ "$minor" -gt "$max_minor" ]; }; then
+        max_major=$major
+        max_minor=$minor
+        go_path="$dir/"
+      fi
+    fi
+  done
+  # Minimum version check against go_version macro
+  req_ver="%{go_version}"
+  req_major="${req_ver%%.*}"
+  req_minor_full="${req_ver#*.}"
+  req_minor="${req_minor_full%%.*}"
+
+  if [ -n "$go_path" ]; then
+    if [ "$max_major" -lt "$req_major" ] || { [ "$max_major" -eq "$req_major" ] && [ "$max_minor" -lt "$req_minor" ]; }; then
+      echo "ERROR: Found Go version ${max_major}.${max_minor} at ${go_path}, but version >= %{go_version} is required."
+      exit 1
+    fi
   fi
 %else
   %if "%{?_go_bin}" != ""
     go_path='%{_go_bin}/'
   %endif
-# "_go_bin" != ""
-
 %endif
 # ubuntu