Description Mina Galić 2020-01-21 08:15:32 UTC

When using a builtin in fish wrongly, fish tries to helpfully render that builtin's help page. Unfortunately, by default groff isn't installed, and fish, despite using nroff doesn't depend on it, so the result is:

~ $ set -e /usr/local/llvm80/bin fish_user_paths
fish: Unknown command nroff
/usr/local/share/fish/functions/__fish_print_help.fish (line 1):
gunzip -c "$__fish_data_dir/man/man1/$item.1.gz" 2>/dev/null | nroff -c -man $mfish -t $rLL 2>/dev/null
                                                               ^
in command substitution
        called on line 28 of file /usr/local/share/fish/functions/__fish_print_help.fish

in function '__fish_print_help'
        called on standard input
        with parameter list 'set'

in command substitution
        called on standard input

set --erase: Expected 1 args, got 2


after installing groff, the same invocation yields:

~ $ set -e /usr/local/llvm80/bin fish_user_paths
set --erase: Expected 1 args, got 2

       set

   Synopsis
       set [SCOPE_OPTIONS]
       set [OPTIONS] VARIABLE_NAME VALUES...
       set [OPTIONS] VARIABLE_NAME[INDICES]... VALUES...
       set ( -q | --query ) [SCOPE_OPTIONS] VARIABLE_NAMES...
       set ( -e | --erase ) [SCOPE_OPTIONS] VARIABLE_NAME
       set ( -e | --erase ) [SCOPE_OPTIONS] VARIABLE_NAME[INDICES]...
       set ( -S | --show ) [SCOPE_OPTIONS] [VARIABLE_NAME]...

set: Type 'help set' for related documentation