Reuh/candran
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Use argparse to parse CLI args, separate preprocessor constants from options

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This commit is contained in:
Étienne Fildadut 2021-06-17 19:45:53 +02:00
parent dd22f2de3d
commit e9ae8e21a3
8 changed files with 253 additions and 346 deletions
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44
bin/can
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@ -1,28 +1,30 @@
#!/usr/bin/env lua
local candran = require("candran").setup()
local cmdline = require("candran.cmdline")
local util = require("candran.util")
local argparse = require("argparse")
local args = cmdline(arg)
-- Parse args --
if args.help or args.h then
print("Candran "..candran.VERSION.." interpreter by Reuh")
print("Usage: "..arg[0].." [options] filename")
print("Specify no options to start the REPL.")
print("Use - instead of a filename to read from the standard input.")
print("Interpreter options:")
print(" -help or -h print this text")
print("Default options:")
for opt, val in pairs(candran.default) do
if type(val) == "string" then val = val:gsub("\n", "\\n") end
print((" %s=%q"):format(opt, tostring(val)))
end
return
end
local parser = argparse()
:name "can"
:description("Candran "..candran.VERSION.." interpreter by Reuh.")
:epilog "For more info, see https://github.com/Reuh/candran"
parser:argument("filename", "Candran file to run. Use - to read from standard input. Start the REPL if no filename given.")
:args "?"
util.cli.addCandranOptions(parser)
local args = parser:parse()
local options = util.cli.makeCandranOptions(args)
-- Run --
-- stdin
if arg[#arg] == "-" then
local f, err = candran.load(io.read("*a"), "stdin", nil, args)
if args.filename == "-" then
local f, err = candran.load(io.read("*a"), "stdin", nil, options)
if not f then
io.stderr:write("can: "..err.."\n")
os.exit(1)
@ -33,8 +35,8 @@ if arg[#arg] == "-" then
os.exit(1)
end
-- file
elseif #args >= 1 then
local f, err = candran.loadfile(args[1], nil, args)
elseif args.filename then
local f, err = candran.loadfile(args.filename, nil, options)
if not f then
io.stderr:write("can: "..err.."\n")
os.exit(1)
@ -47,6 +49,8 @@ elseif #args >= 1 then
end
-- REPL
else
candran.default = util.merge(candran.default, options)
-- Setup linenoise
local s, l = pcall(require, "linenoise")
if not s then -- pure Lua compatibility thingy