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use std::{ffi::OsString, path::PathBuf};
use crate::{construct, Args};
#[derive(Clone, Debug, Copy)]
pub enum Style {
Bash,
Zsh,
Fish,
Elvish,
}
fn dump_bash_completer(name: &str) {
println!(
"\
_bpaf_dynamic_completion()
{{
_init_completion || return
local kw;
COMPREPLY=()
IFS=$'\\n' BPAF_REPLY=($( \"$1\" --bpaf-complete-rev={rev} \"${{COMP_WORDS[@]:1}}\" ))
for line in \"${{BPAF_REPLY[@]}}\" ; do
IFS=$'\\t' parts=( $line )
if [[ \"${{parts[0]}}\" == \"literal\" ]] ; then
declare -A table;
kw=\"\"
for part in \"${{parts[@]}}\" ; do
if [ -z \"$kw\" ] ; then
kw=\"$part\"
else
table[\"$kw\"]=\"$part\"
kw=\"\"
fi
done
if [ ${{table[\"show\"]+x}} ] ; then
COMPREPLY+=(\"${{table[\"show\"]}}\")
else
COMPREPLY+=(\"${{table[\"literal\"]}}\")
fi
elif [[ \"${{parts[0]}}\" == \"bash\" ]] ; then
eval ${{parts[1]}}
else
COMPREPLY+=(\"${{parts[0]}}\")
fi
done
}}
complete -F _bpaf_dynamic_completion {name}",
name = name,
rev = 3
);
}
fn dump_zsh_completer(name: &str) {
println!(
"\
#compdef {name}
IFS=$'\\n' lines=($( \"${{words[1]}}\" --bpaf-complete-rev={rev} \"${{words[@]:1}}\" ))
for line in \"${{(@)lines}}\" ; do
IFS=$'\\t' parts=( $(echo \"$line\") )
if [[ \"${{parts[1]}}\" == \"literal\" ]] ; then
typeset -A table
IFS=$'\\t' table=( $(echo -e \"$line\") )
show=( $table[show] )
if [[ ${{#table[@]}} -ne 0 ]] ; then
cmd+=(-d show)
fi
if [[ -n $table[vis_group] ]] ; then
cmd+=(-X $table[vis_group])
fi
if [[ -n $table[hid_group] ]] ; then
cmd+=(-J $table[vis_group])
fi
compadd ${{cmd[@]}} -- $table[literal]
elif [[ \"${{parts[1]}}\" == \"zsh\" ]] ; then
${{parts[2]}}
else
compadd -- \"${{parts[1]}}\"
fi
done",
name = name,
rev = 4,
);
}
fn dump_fish_completer(name: &str) {
println!(
"\
function _bpaf_dynamic_completion
set -l app (commandline --tokenize --current-process)[1]
set -l tmpline --bpaf-complete-rev={rev}
set tmpline $tmpline (commandline --tokenize --current-process)[2..-1]
if test (commandline --current-process) != (string trim (commandline --current-process))
set tmpline $tmpline \"\"
end
for opt in ($app $tmpline)
echo -E \"$opt\"
end
end
complete --no-files --command {name} --arguments '(_bpaf_dynamic_completion)'",
name = name,
rev = 1,
);
}
fn dump_elvish_completer(name: &str) {
println!(
"\
set edit:completion:arg-completer[{name}] = {{ |@args| var args = $args[1..];
var @lines = ( {name} --bpaf-complete-rev={rev} $@args );
use str;
for line $lines {{
var @arg = (str:split \"\\t\" $line)
try {{
edit:complex-candidate $arg[0] &display=( printf \"%-19s %s\" $arg[0] $arg[1] )
}} catch {{
edit:complex-candidate $line
}}
}}
}}",
name = name,
rev = 1,
);
}
enum CompOptions {
Dump { style: Style },
Complete { revision: usize },
}
fn parse_comp_options() -> crate::OptionParser<CompOptions> {
use crate::{long, Parser};
let zsh = long("bpaf-complete-style-zsh").req_flag(Style::Zsh);
let bash = long("bpaf-complete-style-bash").req_flag(Style::Bash);
let fish = long("bpaf-complete-style-fish").req_flag(Style::Fish);
let elvish = long("bpaf-complete-style-elvish").req_flag(Style::Elvish);
let style = construct!([zsh, bash, fish, elvish]);
let dump = construct!(CompOptions::Dump { style });
let revision = long("bpaf-complete-rev").argument::<usize>("REV");
let complete = construct!(CompOptions::Complete { revision });
construct!([complete, dump]).to_options()
}
pub(crate) fn args_with_complete(
os_name: OsString,
arguments: &[OsString],
complete_arguments: &[OsString],
) -> Args {
let path = PathBuf::from(os_name);
let path = path.file_name().expect("binary with no name?").to_str();
if complete_arguments.is_empty() {
return Args::from(arguments);
}
let cargs = Args::from(complete_arguments);
match parse_comp_options().run_inner(cargs) {
Ok(comp) => {
let name = match path {
Some(path) => path,
None => panic!("app name is not utf8, giving up rendering completer"),
};
let rev = match comp {
CompOptions::Dump { style } => {
match style {
Style::Bash => dump_bash_completer(name),
Style::Zsh => dump_zsh_completer(name),
Style::Fish => dump_fish_completer(name),
Style::Elvish => dump_elvish_completer(name),
}
std::process::exit(0)
}
CompOptions::Complete { revision } => revision,
};
Args::from(arguments).set_comp(rev)
}
Err(err) => {
eprintln!("Can't parse bpaf complete options: {:?}", err);
std::process::exit(1);
}
}
}