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Diffstat (limited to 'tools/upbc.lua')
| -rw-r--r-- | tools/upbc.lua | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/tools/upbc.lua b/tools/upbc.lua index f68d25f..955da57 100644 --- a/tools/upbc.lua +++ b/tools/upbc.lua @@ -19,6 +19,12 @@ local upb = require "upb" local src = arg[1] local outbase = arg[2] local basename = arg[3] + +if not (src and outbase and basename) then + print("Usage: upbc <binary descriptor> <output filename base> <symbol prefix>") + return 1 +end + local hfilename = outbase .. ".upb.h" local cfilename = outbase .. ".upb.c" |