summaryrefslogtreecommitdiffstats
path: root/third_party/rust/clap/src/error/mod.rs
diff options
context:
space:
mode:
Diffstat (limited to 'third_party/rust/clap/src/error/mod.rs')
-rw-r--r--third_party/rust/clap/src/error/mod.rs1181
1 files changed, 1181 insertions, 0 deletions
diff --git a/third_party/rust/clap/src/error/mod.rs b/third_party/rust/clap/src/error/mod.rs
new file mode 100644
index 0000000000..5c8a18e397
--- /dev/null
+++ b/third_party/rust/clap/src/error/mod.rs
@@ -0,0 +1,1181 @@
+//! Error reporting
+#![allow(deprecated)]
+
+// Std
+use std::{
+ borrow::Cow,
+ convert::From,
+ error,
+ fmt::{self, Debug, Display, Formatter},
+ io::{self, BufRead},
+ result::Result as StdResult,
+};
+
+// Internal
+use crate::{
+ build::Arg,
+ output::fmt::Colorizer,
+ output::fmt::Stream,
+ parse::features::suggestions,
+ util::{color::ColorChoice, safe_exit, SUCCESS_CODE, USAGE_CODE},
+ AppSettings, Command,
+};
+
+mod context;
+mod kind;
+
+pub use context::ContextKind;
+pub use context::ContextValue;
+pub use kind::ErrorKind;
+
+/// Short hand for [`Result`] type
+///
+/// [`Result`]: std::result::Result
+pub type Result<T, E = Error> = StdResult<T, E>;
+
+/// Command Line Argument Parser Error
+///
+/// See [`Command::error`] to create an error.
+///
+/// [`Command::error`]: crate::Command::error
+#[derive(Debug)]
+pub struct Error {
+ inner: Box<ErrorInner>,
+ /// Deprecated, replaced with [`Error::kind()`]
+ #[deprecated(since = "3.1.0", note = "Replaced with `Error::kind()`")]
+ pub kind: ErrorKind,
+ /// Deprecated, replaced with [`Error::context()`]
+ #[deprecated(since = "3.1.0", note = "Replaced with `Error::context()`")]
+ pub info: Vec<String>,
+}
+
+#[derive(Debug)]
+struct ErrorInner {
+ kind: ErrorKind,
+ context: Vec<(ContextKind, ContextValue)>,
+ message: Option<Message>,
+ source: Option<Box<dyn error::Error + Send + Sync>>,
+ help_flag: Option<&'static str>,
+ color_when: ColorChoice,
+ wait_on_exit: bool,
+ backtrace: Option<Backtrace>,
+}
+
+impl Error {
+ /// Create an unformatted error
+ ///
+ /// This is for you need to pass the error up to
+ /// a place that has access to the `Command` at which point you can call [`Error::format`].
+ ///
+ /// Prefer [`Command::error`] for generating errors.
+ ///
+ /// [`Command::error`]: crate::Command::error
+ pub fn raw(kind: ErrorKind, message: impl std::fmt::Display) -> Self {
+ Self::new(kind).set_message(message.to_string())
+ }
+
+ /// Format the existing message with the Command's context
+ #[must_use]
+ pub fn format(mut self, cmd: &mut Command) -> Self {
+ cmd._build_self();
+ let usage = cmd.render_usage();
+ if let Some(message) = self.inner.message.as_mut() {
+ message.format(cmd, usage);
+ }
+ self.with_cmd(cmd)
+ }
+
+ /// Type of error for programmatic processing
+ pub fn kind(&self) -> ErrorKind {
+ self.inner.kind
+ }
+
+ /// Additional information to further qualify the error
+ pub fn context(&self) -> impl Iterator<Item = (ContextKind, &ContextValue)> {
+ self.inner.context.iter().map(|(k, v)| (*k, v))
+ }
+
+ /// Should the message be written to `stdout` or not?
+ #[inline]
+ pub fn use_stderr(&self) -> bool {
+ self.stream() == Stream::Stderr
+ }
+
+ pub(crate) fn stream(&self) -> Stream {
+ match self.kind() {
+ ErrorKind::DisplayHelp | ErrorKind::DisplayVersion => Stream::Stdout,
+ _ => Stream::Stderr,
+ }
+ }
+
+ /// Prints the error and exits.
+ ///
+ /// Depending on the error kind, this either prints to `stderr` and exits with a status of `2`
+ /// or prints to `stdout` and exits with a status of `0`.
+ pub fn exit(&self) -> ! {
+ if self.use_stderr() {
+ // Swallow broken pipe errors
+ let _ = self.print();
+
+ if self.inner.wait_on_exit {
+ wlnerr!("\nPress [ENTER] / [RETURN] to continue...");
+ let mut s = String::new();
+ let i = io::stdin();
+ i.lock().read_line(&mut s).unwrap();
+ }
+
+ safe_exit(USAGE_CODE);
+ }
+
+ // Swallow broken pipe errors
+ let _ = self.print();
+ safe_exit(SUCCESS_CODE)
+ }
+
+ /// Prints formatted and colored error to `stdout` or `stderr` according to its error kind
+ ///
+ /// # Example
+ /// ```no_run
+ /// use clap::Command;
+ ///
+ /// match Command::new("Command").try_get_matches() {
+ /// Ok(matches) => {
+ /// // do_something
+ /// },
+ /// Err(err) => {
+ /// err.print().expect("Error writing Error");
+ /// // do_something
+ /// },
+ /// };
+ /// ```
+ pub fn print(&self) -> io::Result<()> {
+ self.formatted().print()
+ }
+
+ /// Deprecated, replaced with [`Command::error`]
+ ///
+ /// [`Command::error`]: crate::Command::error
+ #[deprecated(since = "3.0.0", note = "Replaced with `Command::error`")]
+ #[doc(hidden)]
+ pub fn with_description(description: String, kind: ErrorKind) -> Self {
+ Error::raw(kind, description)
+ }
+
+ fn new(kind: ErrorKind) -> Self {
+ Self {
+ inner: Box::new(ErrorInner {
+ kind,
+ context: Vec::new(),
+ message: None,
+ source: None,
+ help_flag: None,
+ color_when: ColorChoice::Never,
+ wait_on_exit: false,
+ backtrace: Backtrace::new(),
+ }),
+ kind,
+ info: vec![],
+ }
+ }
+
+ #[inline(never)]
+ fn for_app(kind: ErrorKind, cmd: &Command, colorizer: Colorizer, info: Vec<String>) -> Self {
+ Self::new(kind)
+ .set_message(colorizer)
+ .with_cmd(cmd)
+ .set_info(info)
+ }
+
+ pub(crate) fn with_cmd(self, cmd: &Command) -> Self {
+ self.set_wait_on_exit(cmd.is_set(AppSettings::WaitOnError))
+ .set_color(cmd.get_color())
+ .set_help_flag(get_help_flag(cmd))
+ }
+
+ pub(crate) fn set_message(mut self, message: impl Into<Message>) -> Self {
+ self.inner.message = Some(message.into());
+ self
+ }
+
+ pub(crate) fn set_info(mut self, info: Vec<String>) -> Self {
+ self.info = info;
+ self
+ }
+
+ pub(crate) fn set_source(mut self, source: Box<dyn error::Error + Send + Sync>) -> Self {
+ self.inner.source = Some(source);
+ self
+ }
+
+ pub(crate) fn set_color(mut self, color_when: ColorChoice) -> Self {
+ self.inner.color_when = color_when;
+ self
+ }
+
+ pub(crate) fn set_help_flag(mut self, help_flag: Option<&'static str>) -> Self {
+ self.inner.help_flag = help_flag;
+ self
+ }
+
+ pub(crate) fn set_wait_on_exit(mut self, yes: bool) -> Self {
+ self.inner.wait_on_exit = yes;
+ self
+ }
+
+ /// Does not verify if `ContextKind` is already present
+ #[inline(never)]
+ pub(crate) fn insert_context_unchecked(
+ mut self,
+ kind: ContextKind,
+ value: ContextValue,
+ ) -> Self {
+ self.inner.context.push((kind, value));
+ self
+ }
+
+ /// Does not verify if `ContextKind` is already present
+ #[inline(never)]
+ pub(crate) fn extend_context_unchecked<const N: usize>(
+ mut self,
+ context: [(ContextKind, ContextValue); N],
+ ) -> Self {
+ self.inner.context.extend(context);
+ self
+ }
+
+ #[inline(never)]
+ fn get_context(&self, kind: ContextKind) -> Option<&ContextValue> {
+ self.inner
+ .context
+ .iter()
+ .find_map(|(k, v)| (*k == kind).then(|| v))
+ }
+
+ pub(crate) fn display_help(cmd: &Command, colorizer: Colorizer) -> Self {
+ Self::for_app(ErrorKind::DisplayHelp, cmd, colorizer, vec![])
+ }
+
+ pub(crate) fn display_help_error(cmd: &Command, colorizer: Colorizer) -> Self {
+ Self::for_app(
+ ErrorKind::DisplayHelpOnMissingArgumentOrSubcommand,
+ cmd,
+ colorizer,
+ vec![],
+ )
+ }
+
+ pub(crate) fn display_version(cmd: &Command, colorizer: Colorizer) -> Self {
+ Self::for_app(ErrorKind::DisplayVersion, cmd, colorizer, vec![])
+ }
+
+ pub(crate) fn argument_conflict(
+ cmd: &Command,
+ arg: &Arg,
+ mut others: Vec<String>,
+ usage: String,
+ ) -> Self {
+ let info = others.clone();
+ let others = match others.len() {
+ 0 => ContextValue::None,
+ 1 => ContextValue::String(others.pop().unwrap()),
+ _ => ContextValue::Strings(others),
+ };
+ Self::new(ErrorKind::ArgumentConflict)
+ .with_cmd(cmd)
+ .set_info(info)
+ .extend_context_unchecked([
+ (
+ ContextKind::InvalidArg,
+ ContextValue::String(arg.to_string()),
+ ),
+ (ContextKind::PriorArg, others),
+ (ContextKind::Usage, ContextValue::String(usage)),
+ ])
+ }
+
+ pub(crate) fn empty_value(cmd: &Command, good_vals: &[&str], arg: &Arg, usage: String) -> Self {
+ let info = vec![arg.to_string()];
+ let mut err = Self::new(ErrorKind::EmptyValue)
+ .with_cmd(cmd)
+ .set_info(info)
+ .extend_context_unchecked([
+ (
+ ContextKind::InvalidArg,
+ ContextValue::String(arg.to_string()),
+ ),
+ (ContextKind::Usage, ContextValue::String(usage)),
+ ]);
+ if !good_vals.is_empty() {
+ err = err.insert_context_unchecked(
+ ContextKind::ValidValue,
+ ContextValue::Strings(good_vals.iter().map(|s| (*s).to_owned()).collect()),
+ );
+ }
+ err
+ }
+
+ pub(crate) fn no_equals(cmd: &Command, arg: String, usage: String) -> Self {
+ let info = vec![arg.to_string()];
+ Self::new(ErrorKind::NoEquals)
+ .with_cmd(cmd)
+ .set_info(info)
+ .extend_context_unchecked([
+ (ContextKind::InvalidArg, ContextValue::String(arg)),
+ (ContextKind::Usage, ContextValue::String(usage)),
+ ])
+ }
+
+ pub(crate) fn invalid_value(
+ cmd: &Command,
+ bad_val: String,
+ good_vals: &[&str],
+ arg: &Arg,
+ usage: String,
+ ) -> Self {
+ let mut info = vec![arg.to_string(), bad_val.clone()];
+ info.extend(good_vals.iter().map(|s| (*s).to_owned()));
+
+ let suggestion = suggestions::did_you_mean(&bad_val, good_vals.iter()).pop();
+ let mut err = Self::new(ErrorKind::InvalidValue)
+ .with_cmd(cmd)
+ .set_info(info)
+ .extend_context_unchecked([
+ (
+ ContextKind::InvalidArg,
+ ContextValue::String(arg.to_string()),
+ ),
+ (ContextKind::InvalidValue, ContextValue::String(bad_val)),
+ (
+ ContextKind::ValidValue,
+ ContextValue::Strings(good_vals.iter().map(|s| (*s).to_owned()).collect()),
+ ),
+ (ContextKind::Usage, ContextValue::String(usage)),
+ ]);
+ if let Some(suggestion) = suggestion {
+ err = err.insert_context_unchecked(
+ ContextKind::SuggestedValue,
+ ContextValue::String(suggestion),
+ );
+ }
+ err
+ }
+
+ pub(crate) fn invalid_subcommand(
+ cmd: &Command,
+ subcmd: String,
+ did_you_mean: String,
+ name: String,
+ usage: String,
+ ) -> Self {
+ let info = vec![subcmd.clone()];
+ let suggestion = format!("{} -- {}", name, subcmd);
+ Self::new(ErrorKind::InvalidSubcommand)
+ .with_cmd(cmd)
+ .set_info(info)
+ .extend_context_unchecked([
+ (ContextKind::InvalidSubcommand, ContextValue::String(subcmd)),
+ (
+ ContextKind::SuggestedSubcommand,
+ ContextValue::String(did_you_mean),
+ ),
+ (
+ ContextKind::SuggestedCommand,
+ ContextValue::String(suggestion),
+ ),
+ (ContextKind::Usage, ContextValue::String(usage)),
+ ])
+ }
+
+ pub(crate) fn unrecognized_subcommand(cmd: &Command, subcmd: String, usage: String) -> Self {
+ let info = vec![subcmd.clone()];
+ Self::new(ErrorKind::UnrecognizedSubcommand)
+ .with_cmd(cmd)
+ .set_info(info)
+ .extend_context_unchecked([
+ (ContextKind::InvalidSubcommand, ContextValue::String(subcmd)),
+ (ContextKind::Usage, ContextValue::String(usage)),
+ ])
+ }
+
+ pub(crate) fn missing_required_argument(
+ cmd: &Command,
+ required: Vec<String>,
+ usage: String,
+ ) -> Self {
+ let info = required.clone();
+ Self::new(ErrorKind::MissingRequiredArgument)
+ .with_cmd(cmd)
+ .set_info(info)
+ .extend_context_unchecked([
+ (ContextKind::InvalidArg, ContextValue::Strings(required)),
+ (ContextKind::Usage, ContextValue::String(usage)),
+ ])
+ }
+
+ pub(crate) fn missing_subcommand(cmd: &Command, name: String, usage: String) -> Self {
+ let info = vec![];
+ Self::new(ErrorKind::MissingSubcommand)
+ .with_cmd(cmd)
+ .set_info(info)
+ .extend_context_unchecked([
+ (ContextKind::InvalidSubcommand, ContextValue::String(name)),
+ (ContextKind::Usage, ContextValue::String(usage)),
+ ])
+ }
+
+ pub(crate) fn invalid_utf8(cmd: &Command, usage: String) -> Self {
+ let info = vec![];
+ Self::new(ErrorKind::InvalidUtf8)
+ .with_cmd(cmd)
+ .set_info(info)
+ .extend_context_unchecked([(ContextKind::Usage, ContextValue::String(usage))])
+ }
+
+ pub(crate) fn too_many_occurrences(
+ cmd: &Command,
+ arg: &Arg,
+ max_occurs: usize,
+ curr_occurs: usize,
+ usage: String,
+ ) -> Self {
+ let info = vec![
+ arg.to_string(),
+ curr_occurs.to_string(),
+ max_occurs.to_string(),
+ ];
+ Self::new(ErrorKind::TooManyOccurrences)
+ .with_cmd(cmd)
+ .set_info(info)
+ .extend_context_unchecked([
+ (
+ ContextKind::InvalidArg,
+ ContextValue::String(arg.to_string()),
+ ),
+ (
+ ContextKind::MaxOccurrences,
+ ContextValue::Number(max_occurs as isize),
+ ),
+ (
+ ContextKind::ActualNumValues,
+ ContextValue::Number(curr_occurs as isize),
+ ),
+ (ContextKind::Usage, ContextValue::String(usage)),
+ ])
+ }
+
+ pub(crate) fn too_many_values(cmd: &Command, val: String, arg: String, usage: String) -> Self {
+ let info = vec![arg.to_string(), val.clone()];
+ Self::new(ErrorKind::TooManyValues)
+ .with_cmd(cmd)
+ .set_info(info)
+ .extend_context_unchecked([
+ (ContextKind::InvalidArg, ContextValue::String(arg)),
+ (ContextKind::InvalidValue, ContextValue::String(val)),
+ (ContextKind::Usage, ContextValue::String(usage)),
+ ])
+ }
+
+ pub(crate) fn too_few_values(
+ cmd: &Command,
+ arg: &Arg,
+ min_vals: usize,
+ curr_vals: usize,
+ usage: String,
+ ) -> Self {
+ let info = vec![arg.to_string(), curr_vals.to_string(), min_vals.to_string()];
+ Self::new(ErrorKind::TooFewValues)
+ .with_cmd(cmd)
+ .set_info(info)
+ .extend_context_unchecked([
+ (
+ ContextKind::InvalidArg,
+ ContextValue::String(arg.to_string()),
+ ),
+ (
+ ContextKind::MinValues,
+ ContextValue::Number(min_vals as isize),
+ ),
+ (
+ ContextKind::ActualNumValues,
+ ContextValue::Number(curr_vals as isize),
+ ),
+ (ContextKind::Usage, ContextValue::String(usage)),
+ ])
+ }
+
+ pub(crate) fn value_validation(
+ arg: String,
+ val: String,
+ err: Box<dyn error::Error + Send + Sync>,
+ ) -> Self {
+ let info = vec![arg.to_string(), val.to_string(), err.to_string()];
+ Self::new(ErrorKind::ValueValidation)
+ .set_info(info)
+ .set_source(err)
+ .extend_context_unchecked([
+ (ContextKind::InvalidArg, ContextValue::String(arg)),
+ (ContextKind::InvalidValue, ContextValue::String(val)),
+ ])
+ }
+
+ pub(crate) fn wrong_number_of_values(
+ cmd: &Command,
+ arg: &Arg,
+ num_vals: usize,
+ curr_vals: usize,
+ usage: String,
+ ) -> Self {
+ let info = vec![arg.to_string(), curr_vals.to_string(), num_vals.to_string()];
+ Self::new(ErrorKind::WrongNumberOfValues)
+ .with_cmd(cmd)
+ .set_info(info)
+ .extend_context_unchecked([
+ (
+ ContextKind::InvalidArg,
+ ContextValue::String(arg.to_string()),
+ ),
+ (
+ ContextKind::ExpectedNumValues,
+ ContextValue::Number(num_vals as isize),
+ ),
+ (
+ ContextKind::ActualNumValues,
+ ContextValue::Number(curr_vals as isize),
+ ),
+ (ContextKind::Usage, ContextValue::String(usage)),
+ ])
+ }
+
+ pub(crate) fn unexpected_multiple_usage(cmd: &Command, arg: &Arg, usage: String) -> Self {
+ let info = vec![arg.to_string()];
+ Self::new(ErrorKind::UnexpectedMultipleUsage)
+ .with_cmd(cmd)
+ .set_info(info)
+ .extend_context_unchecked([
+ (
+ ContextKind::InvalidArg,
+ ContextValue::String(arg.to_string()),
+ ),
+ (ContextKind::Usage, ContextValue::String(usage)),
+ ])
+ }
+
+ pub(crate) fn unknown_argument(
+ cmd: &Command,
+ arg: String,
+ did_you_mean: Option<(String, Option<String>)>,
+ usage: String,
+ ) -> Self {
+ let info = vec![arg.to_string()];
+ let mut err = Self::new(ErrorKind::UnknownArgument)
+ .with_cmd(cmd)
+ .set_info(info)
+ .extend_context_unchecked([
+ (ContextKind::InvalidArg, ContextValue::String(arg)),
+ (ContextKind::Usage, ContextValue::String(usage)),
+ ]);
+ if let Some((flag, sub)) = did_you_mean {
+ err = err.insert_context_unchecked(
+ ContextKind::SuggestedArg,
+ ContextValue::String(format!("--{}", flag)),
+ );
+ if let Some(sub) = sub {
+ err = err.insert_context_unchecked(
+ ContextKind::SuggestedSubcommand,
+ ContextValue::String(sub),
+ );
+ }
+ }
+ err
+ }
+
+ pub(crate) fn unnecessary_double_dash(cmd: &Command, arg: String, usage: String) -> Self {
+ let info = vec![arg.to_string()];
+ Self::new(ErrorKind::UnknownArgument)
+ .with_cmd(cmd)
+ .set_info(info)
+ .extend_context_unchecked([
+ (ContextKind::InvalidArg, ContextValue::String(arg)),
+ (ContextKind::TrailingArg, ContextValue::Bool(true)),
+ (ContextKind::Usage, ContextValue::String(usage)),
+ ])
+ }
+
+ pub(crate) fn argument_not_found_auto(arg: String) -> Self {
+ let info = vec![arg.to_string()];
+ Self::new(ErrorKind::ArgumentNotFound)
+ .set_info(info)
+ .extend_context_unchecked([(ContextKind::InvalidArg, ContextValue::String(arg))])
+ }
+
+ fn formatted(&self) -> Cow<'_, Colorizer> {
+ if let Some(message) = self.inner.message.as_ref() {
+ message.formatted()
+ } else {
+ let mut c = Colorizer::new(self.stream(), self.inner.color_when);
+
+ start_error(&mut c);
+
+ if !self.write_dynamic_context(&mut c) {
+ if let Some(msg) = self.kind().as_str() {
+ c.none(msg.to_owned());
+ } else if let Some(source) = self.inner.source.as_ref() {
+ c.none(source.to_string());
+ } else {
+ c.none("Unknown cause");
+ }
+ }
+
+ let usage = self.get_context(ContextKind::Usage);
+ if let Some(ContextValue::String(usage)) = usage {
+ put_usage(&mut c, usage);
+ }
+
+ try_help(&mut c, self.inner.help_flag);
+
+ Cow::Owned(c)
+ }
+ }
+
+ #[must_use]
+ fn write_dynamic_context(&self, c: &mut Colorizer) -> bool {
+ match self.kind() {
+ ErrorKind::ArgumentConflict => {
+ let invalid_arg = self.get_context(ContextKind::InvalidArg);
+ let prior_arg = self.get_context(ContextKind::PriorArg);
+ if let (Some(ContextValue::String(invalid_arg)), Some(prior_arg)) =
+ (invalid_arg, prior_arg)
+ {
+ c.none("The argument '");
+ c.warning(invalid_arg);
+ c.none("' cannot be used with");
+
+ match prior_arg {
+ ContextValue::Strings(values) => {
+ c.none(":");
+ for v in values {
+ c.none("\n ");
+ c.warning(&**v);
+ }
+ }
+ ContextValue::String(value) => {
+ c.none(" '");
+ c.warning(value);
+ c.none("'");
+ }
+ _ => {
+ c.none(" one or more of the other specified arguments");
+ }
+ }
+ true
+ } else {
+ false
+ }
+ }
+ ErrorKind::EmptyValue => {
+ let invalid_arg = self.get_context(ContextKind::InvalidArg);
+ if let Some(ContextValue::String(invalid_arg)) = invalid_arg {
+ c.none("The argument '");
+ c.warning(invalid_arg);
+ c.none("' requires a value but none was supplied");
+
+ let possible_values = self.get_context(ContextKind::ValidValue);
+ if let Some(ContextValue::Strings(possible_values)) = possible_values {
+ c.none("\n\t[possible values: ");
+ if let Some((last, elements)) = possible_values.split_last() {
+ for v in elements {
+ c.good(escape(v));
+ c.none(", ");
+ }
+ c.good(escape(last));
+ }
+ c.none("]");
+ }
+ true
+ } else {
+ false
+ }
+ }
+ ErrorKind::NoEquals => {
+ let invalid_arg = self.get_context(ContextKind::InvalidArg);
+ if let Some(ContextValue::String(invalid_arg)) = invalid_arg {
+ c.none("Equal sign is needed when assigning values to '");
+ c.warning(invalid_arg);
+ c.none("'.");
+ true
+ } else {
+ false
+ }
+ }
+ ErrorKind::InvalidValue => {
+ let invalid_arg = self.get_context(ContextKind::InvalidArg);
+ let invalid_value = self.get_context(ContextKind::InvalidValue);
+ if let (
+ Some(ContextValue::String(invalid_arg)),
+ Some(ContextValue::String(invalid_value)),
+ ) = (invalid_arg, invalid_value)
+ {
+ c.none(quote(invalid_value));
+ c.none(" isn't a valid value for '");
+ c.warning(invalid_arg);
+ c.none("'");
+
+ let possible_values = self.get_context(ContextKind::ValidValue);
+ if let Some(ContextValue::Strings(possible_values)) = possible_values {
+ c.none("\n\t[possible values: ");
+ if let Some((last, elements)) = possible_values.split_last() {
+ for v in elements {
+ c.good(escape(v));
+ c.none(", ");
+ }
+ c.good(escape(last));
+ }
+ c.none("]");
+ }
+
+ let suggestion = self.get_context(ContextKind::SuggestedValue);
+ if let Some(ContextValue::String(suggestion)) = suggestion {
+ c.none("\n\n\tDid you mean ");
+ c.good(quote(suggestion));
+ c.none("?");
+ }
+ true
+ } else {
+ false
+ }
+ }
+ ErrorKind::InvalidSubcommand => {
+ let invalid_sub = self.get_context(ContextKind::InvalidSubcommand);
+ if let Some(ContextValue::String(invalid_sub)) = invalid_sub {
+ c.none("The subcommand '");
+ c.warning(invalid_sub);
+ c.none("' wasn't recognized");
+
+ let valid_sub = self.get_context(ContextKind::SuggestedSubcommand);
+ if let Some(ContextValue::String(valid_sub)) = valid_sub {
+ c.none("\n\n\tDid you mean ");
+ c.good(valid_sub);
+ c.none("?");
+ }
+
+ let suggestion = self.get_context(ContextKind::SuggestedCommand);
+ if let Some(ContextValue::String(suggestion)) = suggestion {
+ c.none(
+ "\n\nIf you believe you received this message in error, try re-running with '",
+ );
+ c.good(suggestion);
+ c.none("'");
+ }
+ true
+ } else {
+ false
+ }
+ }
+ ErrorKind::UnrecognizedSubcommand => {
+ let invalid_sub = self.get_context(ContextKind::InvalidSubcommand);
+ if let Some(ContextValue::String(invalid_sub)) = invalid_sub {
+ c.none("The subcommand '");
+ c.warning(invalid_sub);
+ c.none("' wasn't recognized");
+ true
+ } else {
+ false
+ }
+ }
+ ErrorKind::MissingRequiredArgument => {
+ let invalid_arg = self.get_context(ContextKind::InvalidArg);
+ if let Some(ContextValue::Strings(invalid_arg)) = invalid_arg {
+ c.none("The following required arguments were not provided:");
+ for v in invalid_arg {
+ c.none("\n ");
+ c.good(&**v);
+ }
+ true
+ } else {
+ false
+ }
+ }
+ ErrorKind::MissingSubcommand => {
+ let invalid_sub = self.get_context(ContextKind::InvalidSubcommand);
+ if let Some(ContextValue::String(invalid_sub)) = invalid_sub {
+ c.none("'");
+ c.warning(invalid_sub);
+ c.none("' requires a subcommand but one was not provided");
+ true
+ } else {
+ false
+ }
+ }
+ ErrorKind::InvalidUtf8 => false,
+ ErrorKind::TooManyOccurrences => {
+ let invalid_arg = self.get_context(ContextKind::InvalidArg);
+ let actual_num_occurs = self.get_context(ContextKind::ActualNumOccurrences);
+ let max_occurs = self.get_context(ContextKind::MaxOccurrences);
+ if let (
+ Some(ContextValue::String(invalid_arg)),
+ Some(ContextValue::Number(actual_num_occurs)),
+ Some(ContextValue::Number(max_occurs)),
+ ) = (invalid_arg, actual_num_occurs, max_occurs)
+ {
+ let were_provided = Error::singular_or_plural(*actual_num_occurs as usize);
+ c.none("The argument '");
+ c.warning(invalid_arg);
+ c.none("' allows at most ");
+ c.warning(max_occurs.to_string());
+ c.none(" occurrences but ");
+ c.warning(actual_num_occurs.to_string());
+ c.none(were_provided);
+ true
+ } else {
+ false
+ }
+ }
+ ErrorKind::TooManyValues => {
+ let invalid_arg = self.get_context(ContextKind::InvalidArg);
+ let invalid_value = self.get_context(ContextKind::InvalidValue);
+ if let (
+ Some(ContextValue::String(invalid_arg)),
+ Some(ContextValue::String(invalid_value)),
+ ) = (invalid_arg, invalid_value)
+ {
+ c.none("The value '");
+ c.warning(invalid_value);
+ c.none("' was provided to '");
+ c.warning(invalid_arg);
+ c.none("' but it wasn't expecting any more values");
+ true
+ } else {
+ false
+ }
+ }
+ ErrorKind::TooFewValues => {
+ let invalid_arg = self.get_context(ContextKind::InvalidArg);
+ let actual_num_values = self.get_context(ContextKind::ActualNumValues);
+ let min_values = self.get_context(ContextKind::MinValues);
+ if let (
+ Some(ContextValue::String(invalid_arg)),
+ Some(ContextValue::Number(actual_num_values)),
+ Some(ContextValue::Number(min_values)),
+ ) = (invalid_arg, actual_num_values, min_values)
+ {
+ let were_provided = Error::singular_or_plural(*actual_num_values as usize);
+ c.none("The argument '");
+ c.warning(invalid_arg);
+ c.none("' requires at least ");
+ c.warning(min_values.to_string());
+ c.none(" values but only ");
+ c.warning(actual_num_values.to_string());
+ c.none(were_provided);
+ true
+ } else {
+ false
+ }
+ }
+ ErrorKind::ValueValidation => {
+ let invalid_arg = self.get_context(ContextKind::InvalidArg);
+ let invalid_value = self.get_context(ContextKind::InvalidValue);
+ if let (
+ Some(ContextValue::String(invalid_arg)),
+ Some(ContextValue::String(invalid_value)),
+ ) = (invalid_arg, invalid_value)
+ {
+ c.none("Invalid value ");
+ c.warning(quote(invalid_value));
+ c.none(" for '");
+ c.warning(invalid_arg);
+ if let Some(source) = self.inner.source.as_deref() {
+ c.none("': ");
+ c.none(source.to_string());
+ } else {
+ c.none("'");
+ }
+ true
+ } else {
+ false
+ }
+ }
+ ErrorKind::WrongNumberOfValues => {
+ let invalid_arg = self.get_context(ContextKind::InvalidArg);
+ let actual_num_values = self.get_context(ContextKind::ActualNumValues);
+ let num_values = self.get_context(ContextKind::ExpectedNumValues);
+ if let (
+ Some(ContextValue::String(invalid_arg)),
+ Some(ContextValue::Number(actual_num_values)),
+ Some(ContextValue::Number(num_values)),
+ ) = (invalid_arg, actual_num_values, num_values)
+ {
+ let were_provided = Error::singular_or_plural(*actual_num_values as usize);
+ c.none("The argument '");
+ c.warning(invalid_arg);
+ c.none("' requires ");
+ c.warning(num_values.to_string());
+ c.none(" values, but ");
+ c.warning(actual_num_values.to_string());
+ c.none(were_provided);
+ true
+ } else {
+ false
+ }
+ }
+ ErrorKind::UnexpectedMultipleUsage => {
+ let invalid_arg = self.get_context(ContextKind::InvalidArg);
+ if let Some(ContextValue::String(invalid_arg)) = invalid_arg {
+ c.none("The argument '");
+ c.warning(invalid_arg.to_string());
+ c.none("' was provided more than once, but cannot be used multiple times");
+ true
+ } else {
+ false
+ }
+ }
+ ErrorKind::UnknownArgument => {
+ let invalid_arg = self.get_context(ContextKind::InvalidArg);
+ if let Some(ContextValue::String(invalid_arg)) = invalid_arg {
+ c.none("Found argument '");
+ c.warning(invalid_arg.to_string());
+ c.none("' which wasn't expected, or isn't valid in this context");
+
+ let valid_sub = self.get_context(ContextKind::SuggestedSubcommand);
+ let valid_arg = self.get_context(ContextKind::SuggestedArg);
+ match (valid_sub, valid_arg) {
+ (
+ Some(ContextValue::String(valid_sub)),
+ Some(ContextValue::String(valid_arg)),
+ ) => {
+ c.none("\n\n\tDid you mean ");
+ c.none("to put '");
+ c.good(valid_arg);
+ c.none("' after the subcommand '");
+ c.good(valid_sub);
+ c.none("'?");
+ }
+ (None, Some(ContextValue::String(valid_arg))) => {
+ c.none("\n\n\tDid you mean '");
+ c.good(valid_arg);
+ c.none("'?");
+ }
+ (_, _) => {}
+ }
+
+ let invalid_arg = self.get_context(ContextKind::InvalidArg);
+ if let Some(ContextValue::String(invalid_arg)) = invalid_arg {
+ if invalid_arg.starts_with('-') {
+ c.none(format!(
+ "\n\n\tIf you tried to supply `{}` as a value rather than a flag, use `-- {}`",
+ invalid_arg, invalid_arg
+ ));
+ }
+
+ let trailing_arg = self.get_context(ContextKind::TrailingArg);
+ if trailing_arg == Some(&ContextValue::Bool(true)) {
+ c.none(format!(
+ "\n\n\tIf you tried to supply `{}` as a subcommand, remove the '--' before it.",
+ invalid_arg
+ ));
+ }
+ }
+ true
+ } else {
+ false
+ }
+ }
+ ErrorKind::ArgumentNotFound => {
+ let invalid_arg = self.get_context(ContextKind::InvalidArg);
+ if let Some(ContextValue::String(invalid_arg)) = invalid_arg {
+ c.none("The argument '");
+ c.warning(invalid_arg.to_string());
+ c.none("' wasn't found");
+ true
+ } else {
+ false
+ }
+ }
+ ErrorKind::DisplayHelp
+ | ErrorKind::DisplayHelpOnMissingArgumentOrSubcommand
+ | ErrorKind::DisplayVersion
+ | ErrorKind::Io
+ | ErrorKind::Format => false,
+ }
+ }
+
+ /// Returns the singular or plural form on the verb to be based on the argument's value.
+ fn singular_or_plural(n: usize) -> &'static str {
+ if n > 1 {
+ " were provided"
+ } else {
+ " was provided"
+ }
+ }
+}
+
+impl From<io::Error> for Error {
+ fn from(e: io::Error) -> Self {
+ Error::raw(ErrorKind::Io, e)
+ }
+}
+
+impl From<fmt::Error> for Error {
+ fn from(e: fmt::Error) -> Self {
+ Error::raw(ErrorKind::Format, e)
+ }
+}
+
+impl error::Error for Error {
+ #[allow(trivial_casts)]
+ fn source(&self) -> Option<&(dyn error::Error + 'static)> {
+ self.inner.source.as_ref().map(|e| e.as_ref() as _)
+ }
+}
+
+impl Display for Error {
+ fn fmt(&self, f: &mut Formatter) -> fmt::Result {
+ // Assuming `self.message` already has a trailing newline, from `try_help` or similar
+ write!(f, "{}", self.formatted())?;
+ if let Some(backtrace) = self.inner.backtrace.as_ref() {
+ writeln!(f)?;
+ writeln!(f, "Backtrace:")?;
+ writeln!(f, "{}", backtrace)?;
+ }
+ Ok(())
+ }
+}
+
+fn start_error(c: &mut Colorizer) {
+ c.error("error:");
+ c.none(" ");
+}
+
+fn put_usage(c: &mut Colorizer, usage: impl Into<String>) {
+ c.none("\n\n");
+ c.none(usage);
+}
+
+fn get_help_flag(cmd: &Command) -> Option<&'static str> {
+ if !cmd.is_disable_help_flag_set() {
+ Some("--help")
+ } else if cmd.has_subcommands() && !cmd.is_disable_help_subcommand_set() {
+ Some("help")
+ } else {
+ None
+ }
+}
+
+fn try_help(c: &mut Colorizer, help: Option<&str>) {
+ if let Some(help) = help {
+ c.none("\n\nFor more information try ");
+ c.good(help);
+ c.none("\n");
+ } else {
+ c.none("\n");
+ }
+}
+
+fn quote(s: impl AsRef<str>) -> String {
+ let s = s.as_ref();
+ format!("{:?}", s)
+}
+
+fn escape(s: impl AsRef<str>) -> String {
+ let s = s.as_ref();
+ if s.contains(char::is_whitespace) {
+ quote(s)
+ } else {
+ s.to_owned()
+ }
+}
+
+#[derive(Clone, Debug)]
+pub(crate) enum Message {
+ Raw(String),
+ Formatted(Colorizer),
+}
+
+impl Message {
+ fn format(&mut self, cmd: &Command, usage: String) {
+ match self {
+ Message::Raw(s) => {
+ let mut c = Colorizer::new(Stream::Stderr, cmd.get_color());
+
+ let mut message = String::new();
+ std::mem::swap(s, &mut message);
+ start_error(&mut c);
+ c.none(message);
+ put_usage(&mut c, usage);
+ try_help(&mut c, get_help_flag(cmd));
+ *self = Self::Formatted(c);
+ }
+ Message::Formatted(_) => {}
+ }
+ }
+
+ fn formatted(&self) -> Cow<Colorizer> {
+ match self {
+ Message::Raw(s) => {
+ let mut c = Colorizer::new(Stream::Stderr, ColorChoice::Never);
+ start_error(&mut c);
+ c.none(s);
+ Cow::Owned(c)
+ }
+ Message::Formatted(c) => Cow::Borrowed(c),
+ }
+ }
+}
+
+impl From<String> for Message {
+ fn from(inner: String) -> Self {
+ Self::Raw(inner)
+ }
+}
+
+impl From<Colorizer> for Message {
+ fn from(inner: Colorizer) -> Self {
+ Self::Formatted(inner)
+ }
+}
+
+#[cfg(feature = "debug")]
+#[derive(Debug)]
+struct Backtrace(backtrace::Backtrace);
+
+#[cfg(feature = "debug")]
+impl Backtrace {
+ fn new() -> Option<Self> {
+ Some(Self(backtrace::Backtrace::new()))
+ }
+}
+
+#[cfg(feature = "debug")]
+impl Display for Backtrace {
+ fn fmt(&self, f: &mut Formatter) -> fmt::Result {
+ // `backtrace::Backtrace` uses `Debug` instead of `Display`
+ write!(f, "{:?}", self.0)
+ }
+}
+
+#[cfg(not(feature = "debug"))]
+#[derive(Debug)]
+struct Backtrace;
+
+#[cfg(not(feature = "debug"))]
+impl Backtrace {
+ fn new() -> Option<Self> {
+ None
+ }
+}
+
+#[cfg(not(feature = "debug"))]
+impl Display for Backtrace {
+ fn fmt(&self, _: &mut Formatter) -> fmt::Result {
+ Ok(())
+ }
+}
+
+#[cfg(test)]
+mod tests {
+ /// Check `clap::Error` impls Send and Sync.
+ mod clap_error_impl_send_sync {
+ use crate::Error;
+ trait Foo: std::error::Error + Send + Sync + 'static {}
+ impl Foo for Error {}
+ }
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-23 23:23:00 +0000