// Std
use std::ffi::OsString;
use std::mem;
use std::ops::Deref;
// Internal
use crate::builder::{Arg, ArgPredicate, Command};
use crate::parser::Identifier;
use crate::parser::PendingArg;
use crate::parser::{ArgMatches, MatchedArg, SubCommand, ValueSource};
use crate::util::AnyValue;
use crate::util::FlatMap;
use crate::util::Id;
use crate::INTERNAL_ERROR_MSG;
#[derive(Debug, Default)]
pub(crate) struct ArgMatcher {
matches: ArgMatches,
pending: Option<PendingArg>,
}
impl ArgMatcher {
pub(crate) fn new(_cmd: &Command) -> Self {
ArgMatcher {
matches: ArgMatches {
#[cfg(debug_assertions)]
valid_args: {
let args = _cmd.get_arguments().map(|a| a.get_id().clone());
let groups = _cmd.get_groups().map(|g| g.get_id().clone());
args.chain(groups).collect()
},
#[cfg(debug_assertions)]
valid_subcommands: _cmd
.get_subcommands()
.map(|sc| sc.get_name_str().clone())
.collect(),
..Default::default()
},
pending: None,
}
}
pub(crate) fn into_inner(self) -> ArgMatches {
self.matches
}
pub(crate) fn propagate_globals(&mut self, global_arg_vec: &[Id]) {
debug!("ArgMatcher::get_global_values: global_arg_vec={global_arg_vec:?}");
let mut vals_map = FlatMap::new();
self.fill_in_global_values(global_arg_vec, &mut vals_map);
}
fn fill_in_global_values(
&mut self,
global_arg_vec: &[Id],
vals_map: &mut FlatMap<Id, MatchedArg>,
) {
for global_arg in global_arg_vec {
if let Some(ma) = self.get(global_arg) {
// We have to check if the parent's global arg wasn't used but still exists
// such as from a default value.
//
// For example, `myprog subcommand --global-arg=value` where `--global-arg` defines
// a default value of `other` myprog would have an existing MatchedArg for
// `--global-arg` where the value is `other`
let to_update = if let Some(parent_ma) = vals_map.get(global_arg) {
if parent_ma.source() > ma.source() {
parent_ma
} else {
ma
}
} else {
ma
}
.clone();
vals_map.insert(global_arg.clone(), to_update);
}
}
if let Some(ref mut sc) = self.matches.subcommand {
let mut am = ArgMatcher {
matches: mem::take(&mut sc.matches),
pending: None,
};
am.fill_in_global_values(global_arg_vec, vals_map);
mem::swap(&mut am.matches, &mut sc.matches);
}
for (name, matched_arg) in vals_map.iter_mut() {
self.matches.args.insert(name.clone(), matched_arg.clone());
}
}
pub(crate) fn get(&self, arg: &Id) -> Option<&MatchedArg> {
self.matches.args.get(arg)
}
pub(crate) fn get_mut(&mut self, arg: &Id) -> Option<&mut MatchedArg> {
self.matches.args.get_mut(arg)
}
pub(crate) fn remove(&mut self, arg: &Id) -> bool {
self.matches.args.remove(arg).is_some()
}
pub(crate) fn contains(&self, arg: &Id) -> bool {
self.matches.args.contains_key(arg)
}
pub(crate) fn arg_ids(&self) -> std::slice::Iter<'_, Id> {
self.matches.args.keys()
}
pub(crate) fn args(&self) -> crate::util::flat_map::Iter<'_, Id, MatchedArg> {
self.matches.args.iter()
}
pub(crate) fn entry(&mut self, arg: Id) -> crate::util::Entry<'_, Id, MatchedArg> {
self.matches.args.entry(arg)
}
pub(crate) fn subcommand(&mut self, sc: SubCommand) {
self.matches.subcommand = Some(Box::new(sc));
}
pub(crate) fn subcommand_name(&self) -> Option<&str> {
self.matches.subcommand_name()
}
pub(crate) fn check_explicit(&self, arg: &Id, predicate: &ArgPredicate) -> bool {
self.get(arg)
.map(|a| a.check_explicit(predicate))
.unwrap_or_default()
}
pub(crate) fn start_custom_arg(&mut self, arg: &Arg, source: ValueSource) {
let id = arg.get_id().clone();
debug!("ArgMatcher::start_custom_arg: id={id:?}, source={source:?}");
let ma = self.entry(id).or_insert(MatchedArg::new_arg(arg));
debug_assert_eq!(ma.type_id(), Some(arg.get_value_parser().type_id()));
ma.set_source(source);
ma.new_val_group();
}
pub(crate) fn start_custom_group(&mut self, id: Id, source: ValueSource) {
debug!("ArgMatcher::start_custom_arg: id={id:?}, source={source:?}");
let ma = self.entry(id).or_insert(MatchedArg::new_group());
debug_assert_eq!(ma.type_id(), None);
ma.set_source(source);
ma.new_val_group();
}
pub(crate) fn start_occurrence_of_external(&mut self, cmd: &Command) {
let id = Id::from_static_ref(Id::EXTERNAL);
debug!("ArgMatcher::start_occurrence_of_external: id={id:?}");
let ma = self.entry(id).or_insert(MatchedArg::new_external(cmd));
debug_assert_eq!(
ma.type_id(),
Some(
cmd.get_external_subcommand_value_parser()
.expect(INTERNAL_ERROR_MSG)
.type_id()
)
);
ma.set_source(ValueSource::CommandLine);
ma.new_val_group();
}
pub(crate) fn add_val_to(&mut self, arg: &Id, val: AnyValue, raw_val: OsString) {
let ma = self.get_mut(arg).expect(INTERNAL_ERROR_MSG);
ma.append_val(val, raw_val);
}
pub(crate) fn add_index_to(&mut self, arg: &Id, idx: usize) {
let ma = self.get_mut(arg).expect(INTERNAL_ERROR_MSG);
ma.push_index(idx);
}
pub(crate) fn needs_more_vals(&self, o: &Arg) -> bool {
let num_pending = self
.pending
.as_ref()
.and_then(|p| (p.id == *o.get_id()).then_some(p.raw_vals.len()))
.unwrap_or(0);
debug!(
"ArgMatcher::needs_more_vals: o={}, pending={}",
o.get_id(),
num_pending
);
let expected = o.get_num_args().expect(INTERNAL_ERROR_MSG);
debug!("ArgMatcher::needs_more_vals: expected={expected}, actual={num_pending}");
expected.accepts_more(num_pending)
}
pub(crate) fn pending_arg_id(&self) -> Option<&Id> {
self.pending.as_ref().map(|p| &p.id)
}
pub(crate) fn pending_values_mut(
&mut self,
id: &Id,
ident: Option<Identifier>,
trailing_values: bool,
) -> &mut Vec<OsString> {
let pending = self.pending.get_or_insert_with(|| PendingArg {
id: id.clone(),
ident,
raw_vals: Default::default(),
trailing_idx: None,
});
debug_assert_eq!(pending.id, *id, "{INTERNAL_ERROR_MSG}");
if ident.is_some() {
debug_assert_eq!(pending.ident, ident, "{INTERNAL_ERROR_MSG}");
}
if trailing_values {
pending.trailing_idx.get_or_insert(pending.raw_vals.len());
}
&mut pending.raw_vals
}
pub(crate) fn start_trailing(&mut self) {
if let Some(pending) = &mut self.pending {
// Allow asserting its started on subsequent calls
pending.trailing_idx.get_or_insert(pending.raw_vals.len());
}
}
pub(crate) fn take_pending(&mut self) -> Option<PendingArg> {
self.pending.take()
}
}
impl Deref for ArgMatcher {
type Target = ArgMatches;
fn deref(&self) -> &Self::Target {
&self.matches
}
}
