Given a file horrible.wat:
(module (memory
10) (func
$f (param
$n i32) (result
i32) (if
( i32.lt_s
(
local.get $n)
(
i32.const
0))
( then
(
unreachable)))
(
if
(
i32.lt_s
(local.get $n)
(i32.const 2))
(then (return (local.get $n)))) (if
(i32.eqz
(i32.load (i32.mul (i32.const 4) (local.get $n)))) (then local.get $n i32.const 4 i32.mul
(call $f (i32.sub (local.get $n) (i32.const 1)))
(call $f (i32.sub (local.get $n)
(i32.const 2))) i32.add i32.store )) local.get $n i32.const 4 i32.mul i32.load return))Owi will format it like this:
$ owi fmt horrible.wat
(module
(memory 10)
(func $f (param $n i32) (result i32)
local.get $n
i32.const 0
i32.lt_s
(if
(then
unreachable
)
)
local.get $n
i32.const 2
i32.lt_s
(if
(then
local.get $n
return
)
)
i32.const 4
local.get $n
i32.mul
i32.load align=1
i32.eqz
(if
(then
local.get $n
i32.const 4
i32.mul
local.get $n
i32.const 1
i32.sub
call $f
local.get $n
i32.const 2
i32.sub
call $f
i32.add
i32.store align=1
)
)
local.get $n
i32.const 4
i32.mul
i32.load align=1
return
)
)Are you able to recognize the program now?
$ owi fmt --help=plain
NAME
owi-fmt - Format a .wat or .wast file
SYNOPSIS
owi fmt [--inplace] [OPTION]… [ARG]…
OPTIONS
-i, --inplace
Format in-place, overwriting input file
COMMON OPTIONS
--help[=FMT] (default=auto)
Show this help in format FMT. The value FMT must be one of auto,
pager, groff or plain. With auto, the format is pager or plain
whenever the TERM env var is dumb or undefined.
--version
Show version information.
EXIT STATUS
owi fmt exits with:
0 on success.
123 on indiscriminate errors reported on standard error.
124 on command line parsing errors.
125 on unexpected internal errors (bugs).
BUGS
Email them to <contact@ndrs.fr>.
SEE ALSO
owi(1)