fix: convert %lua_provides to pure Lua for better control

Converts the logic within the %lua_provides macro from a
multi-line string of RPM macros to native Lua code. This allows
for more robust conditional logic, especially when checking for
default Lua versions and handling provides/obsoletes.

install-lua-rock.sh

@@ -0,0 +1,15 @@
+#!/bin/bash
+set -ex
+
+# 1. %{lua_version}
+# 2. %{buildroot}%{_prefix}
+# 3. %{buildroot}%{luarocks_treedir}/%{mod_name}
+
+SOURCE_DIR="$3"
+luarocks --lua-version="$1" --tree="$2" install --deps-mode=none --no-manifest "${*:$#}"
+
+if  [ -d "${SOURCE_DIR}" ] && [ "$(find "${SOURCE_DIR}" -type f | wc -l)" -gt 0 ]
+then
+  mkdir -p __rocktree
+  mv -v "${SOURCE_DIR}"/*/* __rocktree
+fi

lua-macros.changes

@@ -1,3 +1,9 @@
+-------------------------------------------------------------------
+Mon Oct 20 21:30:36 UTC 2025 - Matej Cepl <mcepl@cepl.eu>
+
+- Rewrite %luarocks_install to use a shell script
+  install-lua-rock.sh, which is packaged as well.
+
 -------------------------------------------------------------------
 Tue Oct 14 23:16:09 UTC 2025 - Matej Cepl <mcepl@cepl.eu>
 

lua-macros.spec

@@ -27,6 +27,7 @@ License:        MIT
 Group:          Development/Languages/Other
 URL:            https://www.lua.org
 Source0:        macros.lua
+Source1:        install-lua-rock.sh
 %if 0%{?suse_version} > 1600
 Requires:       lua-interpreter
 %elif 0%{?suse_version} >= 1500
@@ -46,9 +47,11 @@ cp -p %{SOURCE0} .
 :
 
 %install
-install -Dm644 macros.lua %{buildroot}%{_rpmmacrodir}/macros.lua
+install -Dm644 %{SOURCE0} %{buildroot}%{_rpmmacrodir}/macros.lua
+install -Dm755 %{SOURCE1} %{buildroot}%{_rpmconfigdir}/install-lua-rock.sh
 
 %files
 %{_rpmmacrodir}/macros.lua
+%{_rpmconfigdir}/install-lua-rock.sh
 
 %changelog

macros.lua

@@ -44,14 +44,14 @@ print(rpm.expand("%{_datadir}/lua/%{lua_version}"))
   print(result)
 }
 %lua_version_default %{lua:
-local result = 5.4
+local result = "5.4"
 local ver = rpm.expand("%{?suse_version}")
 if #ver > 0 then
     ver = tonumber(ver)
     if ver < 1500 then
-        result = 5.1
+        result = "5.1"
     elseif ver < 1600 then
-        result = 5.3
+        result = "5.3"
     end
 end
 print(result)
@@ -63,31 +63,39 @@ print(result)
   print(nodots)
 }
 # Lua default version
-# This REQUIRES macro %{mod_name} to be defined.
+# This REQUIRES macro %%{mod_name} to be defined.
 # -e: Exclude lua prefix
 # -n: Specify name
 %lua_provides(en:) %{lua:
 local mod_name = rpm.expand("%{?mod_name}")
-if mod_name == "" then
+if mod_name == "" or mod_name == "%{?mod_name}" then
-    print("-- Error: %{mod_name} is not defined!")
+    print("-- Error: %%{mod_name} is not defined!")
     return
 end
-print([[
+
-%if "%{lua_version_nodots}" == "%{lua_version_default_nodots}"
+local lua_ver_nodots = rpm.expand("%{lua_version_nodots}")
-%if 0%{?-n:1}
+local lua_ver_default_nodots = rpm.expand("%{lua_version_default_nodots}")
-Provides: %{-n*} = %{version}-%{release}
+local flavor = rpm.expand("%{flavor}")
-Obsoletes: %{-n*} < %{version}-%{release}
+local version = rpm.expand("%{version}")
-%else
+local release = rpm.expand("%{release}")
-%if 0%{?-e:1}
+
-Provides: %{mod_name} = %{version}-%{release}
+local provides_name
-Obsoletes: %{mod_name} < %{version}-%{release}
+if rpm.expand("%{-n*}") ~= "" then
-%else
+    provides_name = rpm.expand("%{-n*}")
-Provides: lua-%{mod_name} = %{version}-%{release}
+elseif rpm.expand("%{-e:1}") == "1" then
-Obsoletes: lua-%{mod_name} < %{version}-%{release}
+    provides_name = mod_name
-%endif
+else
-%endif
+    provides_name = "lua-" .. mod_name
-%endif
+end
-]])
+
+if lua_ver_nodots == lua_ver_default_nodots then
+    print("Provides: " .. provides_name .. " = " .. version .. "-" .. release .. "\\n")
+    print("Obsoletes: " .. provides_name .. " < " .. version .. "-" .. release .. "\\n")
+end
+
+if flavor == "luajit" then
+    print("Obsoletes: lua51-" .. mod_name .. " <= " .. version .. "-" .. release .. "\\n")
+end
 }
 
 # LuaRocks
@@ -97,7 +105,4 @@ luarocks --lua-version "%{lua_version}" make --deps-mode none --pack-binary-rock
 %luarocks_treedir %{_prefix}/lib/luarocks/rocks-%{lua_version}
 
 %luarocks_install \
-  /bin/sh -c 'luarocks --lua-version="%{lua_version}" --tree="%{buildroot}%{_prefix}" install --deps-mode=none --no-manifest "$@" && \
+  %{_rpmconfigdir}/install-lua-rock.sh "%{lua_version}" "%{buildroot}%{_prefix}" "%{buildroot}%{luarocks_treedir}/%{mod_name}"
-  source_dir="%{buildroot}%{luarocks_treedir}/%{mod_name}/%{rock_version}" && \
-  [ -d "${source_dir}" ] && [ "$(ls -A "${source_dir}" | wc -l)" -gt 0 ] && \
-  mv -v "${source_dir}" __rocktree' --