Initial vendor packages

Signed-off-by: Valentin Popov <valentin@popov.link>

1 files changed, 765 insertions, 0 deletions

diff --git a/vendor/clap_derive/src/derives/args.rs b/vendor/clap_derive/src/derives/args.rs
new file mode 100644
index 0000000..279f6ca
--- /dev/null
+++ b/vendor/clap_derive/src/derives/args.rs
@@ -0,0 +1,765 @@
+// Copyright 2018 Guillaume Pinot (@TeXitoi) <texitoi@texitoi.eu>,
+// Kevin Knapp (@kbknapp) <kbknapp@gmail.com>, and
+// Ana Hobden (@hoverbear) <operator@hoverbear.org>
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+//
+// This work was derived from Structopt (https://github.com/TeXitoi/structopt)
+// commit#ea76fa1b1b273e65e3b0b1046643715b49bec51f which is licensed under the
+// MIT/Apache 2.0 license.
+
+use proc_macro2::{Ident, Span, TokenStream};
+use quote::{format_ident, quote, quote_spanned};
+use syn::{
+    punctuated::Punctuated, spanned::Spanned, token::Comma, Data, DataStruct, DeriveInput, Field,
+    Fields, FieldsNamed, Generics,
+};
+
+use crate::item::{Item, Kind, Name};
+use crate::utils::{inner_type, sub_type, Sp, Ty};
+
+pub fn derive_args(input: &DeriveInput) -> Result<TokenStream, syn::Error> {
+    let ident = &input.ident;
+
+    match input.data {
+        Data::Struct(DataStruct {
+            fields: Fields::Named(ref fields),
+            ..
+        }) => {
+            let name = Name::Derived(ident.clone());
+            let item = Item::from_args_struct(input, name)?;
+            let fields = collect_args_fields(&item, fields)?;
+            gen_for_struct(&item, ident, &input.generics, &fields)
+        }
+        Data::Struct(DataStruct {
+            fields: Fields::Unit,
+            ..
+        }) => {
+            let name = Name::Derived(ident.clone());
+            let item = Item::from_args_struct(input, name)?;
+            let fields = Punctuated::<Field, Comma>::new();
+            let fields = fields
+                .iter()
+                .map(|field| {
+                    let item = Item::from_args_field(field, item.casing(), item.env_casing())?;
+                    Ok((field, item))
+                })
+                .collect::<Result<Vec<_>, syn::Error>>()?;
+            gen_for_struct(&item, ident, &input.generics, &fields)
+        }
+        _ => abort_call_site!("`#[derive(Args)]` only supports non-tuple structs"),
+    }
+}
+
+pub fn gen_for_struct(
+    item: &Item,
+    item_name: &Ident,
+    generics: &Generics,
+    fields: &[(&Field, Item)],
+) -> Result<TokenStream, syn::Error> {
+    if !matches!(&*item.kind(), Kind::Command(_)) {
+        abort! { item.kind().span(),
+            "`{}` cannot be used with `command`",
+            item.kind().name(),
+        }
+    }
+
+    let (impl_generics, ty_generics, where_clause) = generics.split_for_impl();
+
+    let constructor = gen_constructor(fields)?;
+    let updater = gen_updater(fields, true)?;
+    let raw_deprecated = raw_deprecated();
+
+    let app_var = Ident::new("__clap_app", Span::call_site());
+    let augmentation = gen_augment(fields, &app_var, item, false)?;
+    let augmentation_update = gen_augment(fields, &app_var, item, true)?;
+
+    let group_id = if item.skip_group() {
+        quote!(None)
+    } else {
+        let group_id = item.group_id();
+        quote!(Some(clap::Id::from(#group_id)))
+    };
+
+    Ok(quote! {
+        #[allow(
+            dead_code,
+            unreachable_code,
+            unused_variables,
+            unused_braces,
+            unused_qualifications,
+        )]
+        #[allow(
+            clippy::style,
+            clippy::complexity,
+            clippy::pedantic,
+            clippy::restriction,
+            clippy::perf,
+            clippy::deprecated,
+            clippy::nursery,
+            clippy::cargo,
+            clippy::suspicious_else_formatting,
+            clippy::almost_swapped,
+            clippy::redundant_locals,
+        )]
+        #[automatically_derived]
+        impl #impl_generics clap::FromArgMatches for #item_name #ty_generics #where_clause {
+            fn from_arg_matches(__clap_arg_matches: &clap::ArgMatches) -> ::std::result::Result<Self, clap::Error> {
+                Self::from_arg_matches_mut(&mut __clap_arg_matches.clone())
+            }
+
+            fn from_arg_matches_mut(__clap_arg_matches: &mut clap::ArgMatches) -> ::std::result::Result<Self, clap::Error> {
+                #raw_deprecated
+                let v = #item_name #constructor;
+                ::std::result::Result::Ok(v)
+            }
+
+            fn update_from_arg_matches(&mut self, __clap_arg_matches: &clap::ArgMatches) -> ::std::result::Result<(), clap::Error> {
+                self.update_from_arg_matches_mut(&mut __clap_arg_matches.clone())
+            }
+
+            fn update_from_arg_matches_mut(&mut self, __clap_arg_matches: &mut clap::ArgMatches) -> ::std::result::Result<(), clap::Error> {
+                #raw_deprecated
+                #updater
+                ::std::result::Result::Ok(())
+            }
+        }
+
+        #[allow(
+            dead_code,
+            unreachable_code,
+            unused_variables,
+            unused_braces,
+            unused_qualifications,
+        )]
+        #[allow(
+            clippy::style,
+            clippy::complexity,
+            clippy::pedantic,
+            clippy::restriction,
+            clippy::perf,
+            clippy::deprecated,
+            clippy::nursery,
+            clippy::cargo,
+            clippy::suspicious_else_formatting,
+            clippy::almost_swapped,
+            clippy::redundant_locals,
+        )]
+        #[automatically_derived]
+        impl #impl_generics clap::Args for #item_name #ty_generics #where_clause {
+            fn group_id() -> Option<clap::Id> {
+                #group_id
+            }
+            fn augment_args<'b>(#app_var: clap::Command) -> clap::Command {
+                #augmentation
+            }
+            fn augment_args_for_update<'b>(#app_var: clap::Command) -> clap::Command {
+                #augmentation_update
+            }
+        }
+    })
+}
+
+/// Generate a block of code to add arguments/subcommands corresponding to
+/// the `fields` to an cmd.
+pub fn gen_augment(
+    fields: &[(&Field, Item)],
+    app_var: &Ident,
+    parent_item: &Item,
+    override_required: bool,
+) -> Result<TokenStream, syn::Error> {
+    let mut subcommand_specified = false;
+    let mut args = Vec::new();
+    for (field, item) in fields {
+        let kind = item.kind();
+        let genned = match &*kind {
+            Kind::Command(_)
+            | Kind::Value
+            | Kind::Skip(_, _)
+            | Kind::FromGlobal(_)
+            | Kind::ExternalSubcommand => None,
+            Kind::Subcommand(ty) => {
+                if subcommand_specified {
+                    abort!(
+                        field.span(),
+                        "`#[command(subcommand)]` can only be used once per container"
+                    );
+                }
+                subcommand_specified = true;
+
+                let subcmd_type = match (**ty, sub_type(&field.ty)) {
+                    (Ty::Option, Some(sub_type)) => sub_type,
+                    _ => &field.ty,
+                };
+                let implicit_methods = if **ty == Ty::Option {
+                    quote!()
+                } else {
+                    quote_spanned! { kind.span()=>
+                        .subcommand_required(true)
+                        .arg_required_else_help(true)
+                    }
+                };
+
+                let override_methods = if override_required {
+                    quote_spanned! { kind.span()=>
+                        .subcommand_required(false)
+                        .arg_required_else_help(false)
+                    }
+                } else {
+                    quote!()
+                };
+
+                Some(quote! {
+                    let #app_var = <#subcmd_type as clap::Subcommand>::augment_subcommands( #app_var );
+                    let #app_var = #app_var
+                        #implicit_methods
+                        #override_methods;
+                })
+            }
+            Kind::Flatten(ty) => {
+                let inner_type = match (**ty, sub_type(&field.ty)) {
+                    (Ty::Option, Some(sub_type)) => sub_type,
+                    _ => &field.ty,
+                };
+
+                let next_help_heading = item.next_help_heading();
+                let next_display_order = item.next_display_order();
+                if override_required {
+                    Some(quote_spanned! { kind.span()=>
+                        let #app_var = #app_var
+                            #next_help_heading
+                            #next_display_order;
+                        let #app_var = <#inner_type as clap::Args>::augment_args_for_update(#app_var);
+                    })
+                } else {
+                    Some(quote_spanned! { kind.span()=>
+                        let #app_var = #app_var
+                            #next_help_heading
+                            #next_display_order;
+                        let #app_var = <#inner_type as clap::Args>::augment_args(#app_var);
+                    })
+                }
+            }
+            Kind::Arg(ty) => {
+                let value_parser = item.value_parser(&field.ty);
+                let action = item.action(&field.ty);
+                let value_name = item.value_name();
+
+                let implicit_methods = match **ty {
+                    Ty::Unit => {
+                        // Leaving out `value_parser` as it will always fail
+                        quote_spanned! { ty.span()=>
+                            .value_name(#value_name)
+                            #action
+                        }
+                    }
+                    Ty::Option => {
+                        quote_spanned! { ty.span()=>
+                            .value_name(#value_name)
+                            #value_parser
+                            #action
+                        }
+                    }
+
+                    Ty::OptionOption => quote_spanned! { ty.span()=>
+                        .value_name(#value_name)
+                        .num_args(0..=1)
+                        #value_parser
+                        #action
+                    },
+
+                    Ty::OptionVec => {
+                        if item.is_positional() {
+                            quote_spanned! { ty.span()=>
+                                .value_name(#value_name)
+                                .num_args(1..)  // action won't be sufficient for getting multiple
+                                #value_parser
+                                #action
+                            }
+                        } else {
+                            quote_spanned! { ty.span()=>
+                                .value_name(#value_name)
+                                #value_parser
+                                #action
+                            }
+                        }
+                    }
+
+                    Ty::Vec => {
+                        if item.is_positional() {
+                            quote_spanned! { ty.span()=>
+                                .value_name(#value_name)
+                                .num_args(1..)  // action won't be sufficient for getting multiple
+                                #value_parser
+                                #action
+                            }
+                        } else {
+                            quote_spanned! { ty.span()=>
+                                .value_name(#value_name)
+                                #value_parser
+                                #action
+                            }
+                        }
+                    }
+
+                    Ty::VecVec | Ty::OptionVecVec => {
+                        quote_spanned! { ty.span() =>
+                            .value_name(#value_name)
+                            #value_parser
+                            #action
+                        }
+                    }
+
+                    Ty::Other => {
+                        let required = item.find_default_method().is_none();
+                        // `ArgAction::takes_values` is assuming `ArgAction::default_value` will be
+                        // set though that won't always be true but this should be good enough,
+                        // otherwise we'll report an "arg required" error when unwrapping.
+                        let action_value = action.args();
+                        quote_spanned! { ty.span()=>
+                            .value_name(#value_name)
+                            .required(#required && #action_value.takes_values())
+                            #value_parser
+                            #action
+                        }
+                    }
+                };
+
+                let id = item.id();
+                let explicit_methods = item.field_methods();
+                let deprecations = if !override_required {
+                    item.deprecations()
+                } else {
+                    quote!()
+                };
+                let override_methods = if override_required {
+                    quote_spanned! { kind.span()=>
+                        .required(false)
+                    }
+                } else {
+                    quote!()
+                };
+
+                Some(quote_spanned! { field.span()=>
+                    let #app_var = #app_var.arg({
+                        #deprecations
+
+                        #[allow(deprecated)]
+                        let arg = clap::Arg::new(#id)
+                            #implicit_methods;
+
+                        let arg = arg
+                            #explicit_methods;
+
+                        let arg = arg
+                            #override_methods;
+
+                        arg
+                    });
+                })
+            }
+        };
+        args.push(genned);
+    }
+
+    let deprecations = if !override_required {
+        parent_item.deprecations()
+    } else {
+        quote!()
+    };
+    let initial_app_methods = parent_item.initial_top_level_methods();
+    let final_app_methods = parent_item.final_top_level_methods();
+    let group_app_methods = if parent_item.skip_group() {
+        quote!()
+    } else {
+        let group_id = parent_item.group_id();
+        let literal_group_members = fields
+            .iter()
+            .filter_map(|(_field, item)| {
+                let kind = item.kind();
+                if matches!(*kind, Kind::Arg(_)) {
+                    Some(item.id())
+                } else {
+                    None
+                }
+            })
+            .collect::<Vec<_>>();
+        let literal_group_members_len = literal_group_members.len();
+        let mut literal_group_members = quote! {{
+            let members: [clap::Id; #literal_group_members_len] = [#( clap::Id::from(#literal_group_members) ),* ];
+            members
+        }};
+        // HACK: Validation isn't ready yet for nested arg groups, so just don't populate the group in
+        // that situation
+        let possible_group_members_len = fields
+            .iter()
+            .filter(|(_field, item)| {
+                let kind = item.kind();
+                matches!(*kind, Kind::Flatten(_))
+            })
+            .count();
+        if 0 < possible_group_members_len {
+            literal_group_members = quote! {{
+                let members: [clap::Id; 0] = [];
+                members
+            }};
+        }
+
+        let group_methods = parent_item.group_methods();
+
+        quote!(
+            .group(
+                clap::ArgGroup::new(#group_id)
+                    .multiple(true)
+                    #group_methods
+                    .args(#literal_group_members)
+            )
+        )
+    };
+    Ok(quote! {{
+        #deprecations
+        let #app_var = #app_var
+            #initial_app_methods
+            #group_app_methods
+            ;
+        #( #args )*
+        #app_var #final_app_methods
+    }})
+}
+
+pub fn gen_constructor(fields: &[(&Field, Item)]) -> Result<TokenStream, syn::Error> {
+    let fields = fields.iter().map(|(field, item)| {
+        let field_name = field.ident.as_ref().unwrap();
+        let kind = item.kind();
+        let arg_matches = format_ident!("__clap_arg_matches");
+        let genned = match &*kind {
+            Kind::Command(_)
+            | Kind::Value
+            | Kind::ExternalSubcommand => {
+                abort! { kind.span(),
+                    "`{}` cannot be used with `arg`",
+                    kind.name(),
+                }
+            }
+            Kind::Subcommand(ty) => {
+                let subcmd_type = match (**ty, sub_type(&field.ty)) {
+                    (Ty::Option, Some(sub_type)) => sub_type,
+                    _ => &field.ty,
+                };
+                match **ty {
+                    Ty::Option => {
+                        quote_spanned! { kind.span()=>
+                            #field_name: {
+                                if #arg_matches.subcommand_name().map(<#subcmd_type as clap::Subcommand>::has_subcommand).unwrap_or(false) {
+                                    Some(<#subcmd_type as clap::FromArgMatches>::from_arg_matches_mut(#arg_matches)?)
+                                } else {
+                                    None
+                                }
+                            }
+                        }
+                    },
+                    Ty::Other => {
+                        quote_spanned! { kind.span()=>
+                            #field_name: {
+                                <#subcmd_type as clap::FromArgMatches>::from_arg_matches_mut(#arg_matches)?
+                            }
+                        }
+                    },
+                    Ty::Unit |
+                    Ty::Vec |
+                    Ty::OptionOption |
+                    Ty::OptionVec |
+                    Ty::VecVec |
+                    Ty::OptionVecVec => {
+                        abort!(
+                            ty.span(),
+                            "{} types are not supported for subcommand",
+                            ty.as_str()
+                        );
+                    }
+                }
+            }
+
+            Kind::Flatten(ty) => {
+                let inner_type = match (**ty, sub_type(&field.ty)) {
+                    (Ty::Option, Some(sub_type)) => sub_type,
+                    _ => &field.ty,
+                };
+                match **ty {
+                    Ty::Other => {
+                        quote_spanned! { kind.span()=>
+                            #field_name: <#inner_type as clap::FromArgMatches>::from_arg_matches_mut(#arg_matches)?
+                        }
+                    },
+                    Ty::Option => {
+                        quote_spanned! { kind.span()=>
+                            #field_name: {
+                                let group_id = <#inner_type as clap::Args>::group_id()
+                                    .expect("`#[arg(flatten)]`ed field type implements `Args::group_id`");
+                                if #arg_matches.contains_id(group_id.as_str()) {
+                                    Some(
+                                        <#inner_type as clap::FromArgMatches>::from_arg_matches_mut(#arg_matches)?
+                                    )
+                                } else {
+                                    None
+                                }
+                            }
+                        }
+                    },
+                    Ty::Unit |
+                    Ty::Vec |
+                    Ty::OptionOption |
+                    Ty::OptionVec |
+                    Ty::VecVec |
+                    Ty::OptionVecVec => {
+                        abort!(
+                            ty.span(),
+                            "{} types are not supported for flatten",
+                            ty.as_str()
+                        );
+                    }
+                }
+            },
+
+            Kind::Skip(val, _) => match val {
+                None => quote_spanned!(kind.span()=> #field_name: Default::default()),
+                Some(val) => quote_spanned!(kind.span()=> #field_name: (#val).into()),
+            },
+
+            Kind::Arg(ty) | Kind::FromGlobal(ty) => {
+                gen_parsers(item, ty, field_name, field, None)?
+            }
+        };
+        Ok(genned)
+    }).collect::<Result<Vec<_>, syn::Error>>()?;
+
+    Ok(quote! {{
+        #( #fields ),*
+    }})
+}
+
+pub fn gen_updater(fields: &[(&Field, Item)], use_self: bool) -> Result<TokenStream, syn::Error> {
+    let mut genned_fields = Vec::new();
+    for (field, item) in fields {
+        let field_name = field.ident.as_ref().unwrap();
+        let kind = item.kind();
+
+        let access = if use_self {
+            quote! {
+                #[allow(non_snake_case)]
+                let #field_name = &mut self.#field_name;
+            }
+        } else {
+            quote!()
+        };
+        let arg_matches = format_ident!("__clap_arg_matches");
+
+        let genned = match &*kind {
+            Kind::Command(_) | Kind::Value | Kind::ExternalSubcommand => {
+                abort! { kind.span(),
+                    "`{}` cannot be used with `arg`",
+                    kind.name(),
+                }
+            }
+            Kind::Subcommand(ty) => {
+                let subcmd_type = match (**ty, sub_type(&field.ty)) {
+                    (Ty::Option, Some(sub_type)) => sub_type,
+                    _ => &field.ty,
+                };
+
+                let updater = quote_spanned! { ty.span()=>
+                    <#subcmd_type as clap::FromArgMatches>::update_from_arg_matches_mut(#field_name, #arg_matches)?;
+                };
+
+                let updater = match **ty {
+                    Ty::Option => quote_spanned! { kind.span()=>
+                        if let Some(#field_name) = #field_name.as_mut() {
+                            #updater
+                        } else {
+                            *#field_name = Some(<#subcmd_type as clap::FromArgMatches>::from_arg_matches_mut(
+                                #arg_matches
+                            )?);
+                        }
+                    },
+                    _ => quote_spanned! { kind.span()=>
+                        #updater
+                    },
+                };
+
+                quote_spanned! { kind.span()=>
+                    {
+                        #access
+                        #updater
+                    }
+                }
+            }
+
+            Kind::Flatten(ty) => {
+                let inner_type = match (**ty, sub_type(&field.ty)) {
+                    (Ty::Option, Some(sub_type)) => sub_type,
+                    _ => &field.ty,
+                };
+
+                let updater = quote_spanned! { ty.span()=>
+                    <#inner_type as clap::FromArgMatches>::update_from_arg_matches_mut(#field_name, #arg_matches)?;
+                };
+
+                let updater = match **ty {
+                    Ty::Option => quote_spanned! { kind.span()=>
+                        if let Some(#field_name) = #field_name.as_mut() {
+                            #updater
+                        } else {
+                            *#field_name = Some(<#inner_type as clap::FromArgMatches>::from_arg_matches_mut(
+                                #arg_matches
+                            )?);
+                        }
+                    },
+                    _ => quote_spanned! { kind.span()=>
+                        #updater
+                    },
+                };
+
+                quote_spanned! { kind.span()=>
+                    {
+                        #access
+                        #updater
+                    }
+                }
+            }
+
+            Kind::Skip(_, _) => quote!(),
+
+            Kind::Arg(ty) | Kind::FromGlobal(ty) => {
+                gen_parsers(item, ty, field_name, field, Some(&access))?
+            }
+        };
+        genned_fields.push(genned);
+    }
+
+    Ok(quote! {
+        #( #genned_fields )*
+    })
+}
+
+fn gen_parsers(
+    item: &Item,
+    ty: &Sp<Ty>,
+    field_name: &Ident,
+    field: &Field,
+    update: Option<&TokenStream>,
+) -> Result<TokenStream, syn::Error> {
+    let span = ty.span();
+    let convert_type = inner_type(&field.ty);
+    let id = item.id();
+    let get_one = quote_spanned!(span=> remove_one::<#convert_type>);
+    let get_many = quote_spanned!(span=> remove_many::<#convert_type>);
+    let get_occurrences = quote_spanned!(span=> remove_occurrences::<#convert_type>);
+
+    // Give this identifier the same hygiene
+    // as the `arg_matches` parameter definition. This
+    // allows us to refer to `arg_matches` within a `quote_spanned` block
+    let arg_matches = format_ident!("__clap_arg_matches");
+
+    let field_value = match **ty {
+        Ty::Unit => {
+            quote_spanned! { ty.span()=>
+                ()
+            }
+        }
+
+        Ty::Option => {
+            quote_spanned! { ty.span()=>
+                #arg_matches.#get_one(#id)
+            }
+        }
+
+        Ty::OptionOption => quote_spanned! { ty.span()=>
+            if #arg_matches.contains_id(#id) {
+                Some(
+                    #arg_matches.#get_one(#id)
+                )
+            } else {
+                None
+            }
+        },
+
+        Ty::OptionVec => quote_spanned! { ty.span()=>
+            if #arg_matches.contains_id(#id) {
+                Some(#arg_matches.#get_many(#id)
+                    .map(|v| v.collect::<Vec<_>>())
+                    .unwrap_or_else(Vec::new))
+            } else {
+                None
+            }
+        },
+
+        Ty::Vec => {
+            quote_spanned! { ty.span()=>
+                #arg_matches.#get_many(#id)
+                    .map(|v| v.collect::<Vec<_>>())
+                    .unwrap_or_else(Vec::new)
+            }
+        }
+
+        Ty::VecVec => quote_spanned! { ty.span()=>
+            #arg_matches.#get_occurrences(#id)
+                .map(|g| g.map(::std::iter::Iterator::collect).collect::<Vec<Vec<_>>>())
+                .unwrap_or_else(Vec::new)
+        },
+
+        Ty::OptionVecVec => quote_spanned! { ty.span()=>
+            #arg_matches.#get_occurrences(#id)
+                .map(|g| g.map(::std::iter::Iterator::collect).collect::<Vec<Vec<_>>>())
+        },
+
+        Ty::Other => {
+            quote_spanned! { ty.span()=>
+                #arg_matches.#get_one(#id)
+                    .ok_or_else(|| clap::Error::raw(clap::error::ErrorKind::MissingRequiredArgument, concat!("The following required argument was not provided: ", #id)))?
+            }
+        }
+    };
+
+    let genned = if let Some(access) = update {
+        quote_spanned! { field.span()=>
+            if #arg_matches.contains_id(#id) {
+                #access
+                *#field_name = #field_value
+            }
+        }
+    } else {
+        quote_spanned!(field.span()=> #field_name: #field_value )
+    };
+    Ok(genned)
+}
+
+#[cfg(feature = "raw-deprecated")]
+pub fn raw_deprecated() -> TokenStream {
+    quote! {}
+}
+
+#[cfg(not(feature = "raw-deprecated"))]
+pub fn raw_deprecated() -> TokenStream {
+    quote! {
+        #![allow(deprecated)]  // Assuming any deprecation in here will be related to a deprecation in `Args`
+
+    }
+}
+
+pub fn collect_args_fields<'a>(
+    item: &'a Item,
+    fields: &'a FieldsNamed,
+) -> Result<Vec<(&'a Field, Item)>, syn::Error> {
+    fields
+        .named
+        .iter()
+        .map(|field| {
+            let item = Item::from_args_field(field, item.casing(), item.env_casing())?;
+            Ok((field, item))
+        })
+        .collect()
+}