Fix epilog not showing with `luarocks help`

Argparse will print the help when we call :parse(), so the epilog has to
be set at that time. We also want to show an up to date config text when
using `luarocks`, so update the epilog then.

1 files changed, 11 insertions, 3 deletions

diff --git a/src/luarocks/cmd.lua b/src/luarocks/cmd.lua
index 26780eed..0bbb9715 100644
--- a/src/luarocks/cmd.lua
+++ b/src/luarocks/cmd.lua
@@ -338,10 +338,17 @@ local function get_config_text(cfg)
 end
 
 local function get_parser(description, cmd_modules)
+   local epilog = [[
+Variables:
+   Variables from the "variables" table of the configuration file can be
+   overridden with VAR=VALUE assignments.
+
+]]..get_config_text(cfg)
+
    local basename = dir.base_name(program)
    local parser = argparse(
       basename, "LuaRocks "..cfg.program_version..", the Lua package manager\n\n"..
-      program.." - "..description)
+      program.." - "..description, epilog)
       :help_max_width(80)
       :add_help("--help")
       :add_help_command()
@@ -557,14 +564,15 @@ function cmd.run_command(description, commands, external_namespace, ...)
       cfg.local_cache = dir.path(fs.system_cache_dir(), "luarocks")
    end
 
-   parser:epilog([[
+   if not args.command then
+      -- Update the config text
+      parser:epilog([[
 Variables:
    Variables from the "variables" table of the configuration file can be
    overridden with VAR=VALUE assignments.
 
 ]]..get_config_text(cfg))
 
-   if not args.command then
       util.printout()
       util.printout(parser:get_help())
       util.printout()