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|
use clap::{App, AppSettings, Arg};
use crate::config::Config;
use crate::error::Result;
// TODO --add-site (in addition to defaults)
pub struct Opts {
pub list_sites: bool,
pub print_config_path: bool,
pub update_sites: bool,
pub set_api_key: Option<String>,
pub query: Option<String>,
pub config: Config,
}
// TODO accept FnOnce() -> Result<Config> so I can test this
pub fn get_opts() -> Result<Opts> {
let config = Config::new()?;
let limit = &config.limit.to_string();
let sites = &config.sites.join(";");
let engine = &config.search_engine.to_string();
let matches = App::new("so")
.setting(AppSettings::ColoredHelp)
.version(clap::crate_version!())
.author(clap::crate_authors!())
.about(clap::crate_description!())
.arg(
Arg::with_name("list-sites")
.long("list-sites")
.help("Print available StackExchange sites"),
)
.arg(
Arg::with_name("update-sites")
.long("update-sites")
.help("Update cache of StackExchange sites"),
)
.arg(
Arg::with_name("set-api-key")
.long("set-api-key")
.number_of_values(1)
.takes_value(true)
.value_name("key")
.help("Set StackExchange API key"),
)
.arg(
Arg::with_name("print-config-path")
.long("print-config-path")
.help("Print path to config file")
.hidden(true),
)
.arg(
Arg::with_name("site")
.long("site")
.short("s")
.multiple(true)
.number_of_values(1)
.takes_value(true)
.default_value(sites)
.value_name("site-code")
.help("StackExchange site to search"),
)
.arg(
Arg::with_name("limit")
.long("limit")
.short("l")
.number_of_values(1)
.takes_value(true)
.default_value(limit)
.value_name("int")
.validator(|s| s.parse::<u32>().map(|_| ()).map_err(|e| e.to_string()))
.help("Question limit"),
)
.arg(
Arg::with_name("lucky")
.long("lucky")
.help("Print the top-voted answer of the most relevant question"),
)
.arg(
Arg::with_name("no-lucky")
.long("no-lucky")
.help("Disable lucky")
.conflicts_with("lucky")
.hidden(!config.lucky),
)
.arg(
Arg::with_name("query")
.multiple(true)
.index(1)
.required_unless_one(&[
"list-sites",
"update-sites",
"set-api-key",
"print-config-path",
]),
)
.arg(
Arg::with_name("search-engine")
.long("search-engine")
.short("e")
.number_of_values(1)
.takes_value(true)
.default_value(engine)
.value_name("engine")
.possible_values(&["duckduckgo", "google", "stackexchange"])
.help("Use specified search engine")
.next_line_help(true),
)
.get_matches();
let lucky = match (matches.is_present("lucky"), matches.is_present("no-lucky")) {
(true, _) => true,
(_, true) => false,
_ => config.lucky,
};
Ok(Opts {
list_sites: matches.is_present("list-sites"),
print_config_path: matches.is_present("print-config-path"),
update_sites: matches.is_present("update-sites"),
set_api_key: matches.value_of("set-api-key").map(String::from),
query: matches
.values_of("query")
.map(|q| q.collect::<Vec<_>>().join(" ")),
config: Config {
// these unwraps are safe via clap default values & validators
limit: matches.value_of("limit").unwrap().parse::<u16>().unwrap(),
search_engine: serde_yaml::from_str(matches.value_of("search-engine").unwrap())?,
sites: matches
.values_of("site")
.unwrap()
.map(|s| s.split(';'))
.flatten()
.map(String::from)
.collect(),
api_key: matches
.value_of("set-api-key")
.map(String::from)
.or(config.api_key),
lucky,
},
})
}
// TODO how can I test this App given
// https://users.rust-lang.org/t/help-with-idiomatic-rust-and-ownership-semantics/43880
// Maybe pass get_opts a closure that produces the Config...?
|
