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|
use std::io::Write;
use clap::builder::StyledStr;
use clap::*;
use crate::generator::{utils, Generator};
use crate::INTERNAL_ERROR_MSG;
/// Generate elvish completion file
#[derive(Copy, Clone, PartialEq, Eq, Debug)]
pub struct Elvish;
impl Generator for Elvish {
fn file_name(&self, name: &str) -> String {
format!("{name}.elv")
}
fn generate(&self, cmd: &Command, buf: &mut dyn Write) {
let bin_name = cmd
.get_bin_name()
.expect("crate::generate should have set the bin_name");
let subcommands_cases = generate_inner(cmd, "");
let result = format!(
r#"
use builtin;
use str;
set edit:completion:arg-completer[{bin_name}] = {{|@words|
fn spaces {{|n|
builtin:repeat $n ' ' | str:join ''
}}
fn cand {{|text desc|
edit:complex-candidate $text &display=$text' '(spaces (- 14 (wcswidth $text)))$desc
}}
var command = '{bin_name}'
for word $words[1..-1] {{
if (str:has-prefix $word '-') {{
break
}}
set command = $command';'$word
}}
var completions = [{subcommands_cases}
]
$completions[$command]
}}
"#,
);
w!(buf, result.as_bytes());
}
}
// Escape string inside single quotes
fn escape_string(string: &str) -> String {
string.replace('\'', "''")
}
fn get_tooltip<T: ToString>(help: Option<&StyledStr>, data: T) -> String {
match help {
Some(help) => escape_string(&help.to_string()),
_ => data.to_string(),
}
}
fn generate_inner(p: &Command, previous_command_name: &str) -> String {
debug!("generate_inner");
let command_name = if previous_command_name.is_empty() {
p.get_bin_name().expect(INTERNAL_ERROR_MSG).to_string()
} else {
format!("{};{}", previous_command_name, &p.get_name())
};
let mut completions = String::new();
let preamble = String::from("\n cand ");
for option in p.get_opts() {
if let Some(shorts) = option.get_short_and_visible_aliases() {
let tooltip = get_tooltip(option.get_help(), shorts[0]);
for short in shorts {
completions.push_str(&preamble);
completions.push_str(format!("-{short} '{tooltip}'").as_str());
}
}
if let Some(longs) = option.get_long_and_visible_aliases() {
let tooltip = get_tooltip(option.get_help(), longs[0]);
for long in longs {
completions.push_str(&preamble);
completions.push_str(format!("--{long} '{tooltip}'").as_str());
}
}
}
for flag in utils::flags(p) {
if let Some(shorts) = flag.get_short_and_visible_aliases() {
let tooltip = get_tooltip(flag.get_help(), shorts[0]);
for short in shorts {
completions.push_str(&preamble);
completions.push_str(format!("-{short} '{tooltip}'").as_str());
}
}
if let Some(longs) = flag.get_long_and_visible_aliases() {
let tooltip = get_tooltip(flag.get_help(), longs[0]);
for long in longs {
completions.push_str(&preamble);
completions.push_str(format!("--{long} '{tooltip}'").as_str());
}
}
}
for subcommand in p.get_subcommands() {
let data = &subcommand.get_name();
let tooltip = get_tooltip(subcommand.get_about(), data);
completions.push_str(&preamble);
completions.push_str(format!("{data} '{tooltip}'").as_str());
}
let mut subcommands_cases = format!(
r"
&'{}'= {{{}
}}",
&command_name, completions
);
for subcommand in p.get_subcommands() {
let subcommand_subcommands_cases = generate_inner(subcommand, &command_name);
subcommands_cases.push_str(&subcommand_subcommands_cases);
}
subcommands_cases
}
|
