Node:Argp User Customization,
Previous:Argp Examples,
Up:Argp
Argp User Customization
The formatting of argp --help
output may be controlled to some
extent by a program's users, by setting the ARGP_HELP_FMT
environment variable to a comma-separated list of tokens. Whitespace is
ignored:
dup-args
no-dup-args
- These turn duplicate-argument-mode on or off. In duplicate
argument mode, if an option that accepts an argument has multiple names,
the argument is shown for each name. Otherwise, it is only shown for the
first long option. A note is subsequently printed so the user knows that
it applies to other names as well. The default is
no-dup-args
,
which is less consistent, but prettier.
dup-args-note
no-dup-args-note
- These will enable or disable the note informing the user of suppressed
option argument duplication. The default is
dup-args-note
.
short-opt-col=n
- This prints the first short option in column n. The default is 2.
long-opt-col=n
- This prints the first long option in column n. The default is 6.
doc-opt-col=n
- This prints `documentation options' (see Argp Option Flags) in
column n. The default is 2.
opt-doc-col=n
- This prints the documentation for options starting in column
n. The default is 29.
header-col=n
- This will indent the group headers that document groups of options to
column n. The default is 1.
usage-indent=n
- This will indent continuation lines in
Usage:
messages to column
n. The default is 12.
rmargin=n
- This will word wrap help output at or before column n. The default
is 79.