1710: Ambiguous suggetions for InferSubcommands r=CreepySkeleton,pksunkara a=pickfire



Co-authored-by: Ivan Tham <pickfire@riseup.net>
This commit is contained in:
bors[bot] 2020-03-01 14:43:41 +00:00 committed by GitHub
commit cb29d1d547
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4 changed files with 63 additions and 29 deletions

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@ -628,7 +628,7 @@ impl Error {
cause: format!("The subcommand '{}' wasn't recognized", s),
message: format!(
"{} The subcommand '{}' wasn't recognized\n\t\
Did you mean '{}'?\n\n\
Did you mean {}?\n\n\
If you believe you received this message in error, try \
re-running with '{} {} {}'\n\n\
{}\n\n\

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@ -1,3 +1,5 @@
use std::cmp::Ordering;
// Third Party
#[cfg(feature = "suggestions")]
use strsim;
@ -6,35 +8,32 @@ use strsim;
use crate::build::App;
use crate::output::fmt::Format;
/// Produces a string from a given list of possible values which is similar to
/// the passed in value `v` with a certain confidence.
/// Produces multiple strings from a given list of possible values which are similar
/// to the passed in value `v` within a certain confidence by least confidence.
/// Thus in a list of possible values like ["foo", "bar"], the value "fop" will yield
/// `Some("foo")`, whereas "blark" would yield `None`.
#[cfg(feature = "suggestions")]
pub fn did_you_mean<T, I>(v: &str, possible_values: I) -> Option<String>
pub fn did_you_mean<T, I>(v: &str, possible_values: I) -> Vec<String>
where
T: AsRef<str>,
I: IntoIterator<Item = T>,
{
let mut candidate: Option<(f64, String)> = None;
for pv in possible_values {
let confidence = strsim::jaro_winkler(v, pv.as_ref());
if confidence > 0.8 && (candidate.is_none() || (candidate.as_ref().unwrap().0 < confidence))
{
candidate = Some((confidence, pv.as_ref().to_owned()));
}
}
candidate.map(|(_, candidate)| candidate)
let mut candidates: Vec<(f64, String)> = possible_values
.into_iter()
.map(|pv| (strsim::jaro_winkler(v, pv.as_ref()), pv.as_ref().to_owned()))
.filter(|(confidence, _pv)| *confidence > 0.8)
.collect();
candidates.sort_by(|a, b| a.0.partial_cmp(&b.0).unwrap_or(Ordering::Equal));
candidates.into_iter().map(|(_confidence, pv)| pv).collect()
}
#[cfg(not(feature = "suggestions"))]
pub fn did_you_mean<T, I>(_: &str, _: I) -> Option<String>
pub fn did_you_mean<T, I>(_: &str, _: I) -> Vec<String>
where
T: AsRef<str>,
I: IntoIterator<Item = T>,
{
None
Vec::new()
}
/// Returns a suffix that can be empty, or is the standard 'did you mean' phrase
@ -47,7 +46,7 @@ where
T: AsRef<str>,
I: IntoIterator<Item = T>,
{
match did_you_mean(arg, longs) {
match did_you_mean(arg, longs).pop() {
Some(ref candidate) => {
let suffix = format!(
"\n\tDid you mean {}{}?",
@ -62,7 +61,9 @@ where
if let Some(ref candidate) = did_you_mean(
arg,
longs!(subcommand).map(|x| x.to_string_lossy().into_owned()),
) {
)
.pop()
{
let suffix = format!(
"\n\tDid you mean to put '{}{}' after the subcommand '{}'?",
Format::Good("--"),
@ -83,7 +84,7 @@ where
T: AsRef<str>,
I: IntoIterator<Item = T>,
{
match did_you_mean(arg, values) {
match did_you_mean(arg, values).pop() {
Some(ref candidate) => {
let suffix = format!("\n\tDid you mean '{}'?", Format::Good(candidate));
(suffix, Some(candidate.to_owned()))
@ -102,6 +103,12 @@ mod test {
assert_eq!(did_you_mean("tst", p_vals.iter()), Some("test"));
}
#[test]
fn possible_values_match() {
let p_vals = ["test", "temp"];
assert_eq!(did_you_mean("te", p_vals.iter()), Some("test"));
}
#[test]
fn possible_values_nomatch() {
let p_vals = ["test", "possible", "values"];

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@ -547,12 +547,13 @@ where
|| self.is_set(AS::AllowExternalSubcommands)
|| self.is_set(AS::InferSubcommands))
{
if let Some(cdate) =
suggestions::did_you_mean(&*arg_os.to_string_lossy(), sc_names!(self.app))
{
let cands =
suggestions::did_you_mean(&*arg_os.to_string_lossy(), sc_names!(self.app));
if !cands.is_empty() {
let cands: Vec<_> = cands.iter().map(|cand| format!("'{}'", cand)).collect();
return Err(ClapError::invalid_subcommand(
arg_os.to_string_lossy().into_owned(),
cdate,
cands.join(" or "),
self.app.bin_name.as_ref().unwrap_or(&self.app.name),
&*Usage::new(self).create_usage_with_title(&[]),
self.app.color(),
@ -608,8 +609,8 @@ where
if self.is_new_arg(n, needs_val_of)
|| sc_match
|| suggestions::did_you_mean(&n.to_string_lossy(), sc_names!(self.app))
.is_some()
|| !suggestions::did_you_mean(&n.to_string_lossy(), sc_names!(self.app))
.is_empty()
{
debugln!("Parser::get_matches_with: Bumping the positional counter...");
pos_counter += 1;
@ -728,12 +729,13 @@ where
self.app.color(),
));
} else if !has_args || self.is_set(AS::InferSubcommands) && self.has_subcommands() {
if let Some(cdate) =
suggestions::did_you_mean(&*arg_os.to_string_lossy(), sc_names!(self.app))
{
let cands =
suggestions::did_you_mean(&*arg_os.to_string_lossy(), sc_names!(self.app));
if !cands.is_empty() {
let cands: Vec<_> = cands.iter().map(|cand| format!("'{}'", cand)).collect();
return Err(ClapError::invalid_subcommand(
arg_os.to_string_lossy().into_owned(),
cdate,
cands.join(" or "),
self.app.bin_name.as_ref().unwrap_or(&self.app.name),
&*Usage::new(self).create_usage_with_title(&[]),
self.app.color(),

View file

@ -39,6 +39,17 @@ USAGE:
For more information try --help";
#[cfg(feature = "suggestions")]
static DYM_SUBCMD_AMBIGUOUS: &str = "error: The subcommand 'te' wasn't recognized
Did you mean 'test' or 'temp'?
If you believe you received this message in error, try re-running with 'dym -- te'
USAGE:
dym [SUBCOMMAND]
For more information try --help";
#[cfg(feature = "suggestions")]
static DYM_ARG: &str =
"error: Found argument '--subcm' which wasn't expected, or isn't valid in this context
@ -136,6 +147,20 @@ fn subcmd_did_you_mean_output() {
assert!(utils::compare_output(app, "dym subcm", DYM_SUBCMD, true));
}
#[test]
#[cfg(feature = "suggestions")]
fn subcmd_did_you_mean_output_ambiguous() {
let app = App::new("dym")
.subcommand(App::new("test"))
.subcommand(App::new("temp"));
assert!(utils::compare_output(
app,
"dym te",
DYM_SUBCMD_AMBIGUOUS,
true
));
}
#[test]
#[cfg(feature = "suggestions")]
fn subcmd_did_you_mean_output_arg() {