Initial vendor packages

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

vendor/clap/examples/derive_ref/augment_args.rs

@@ -0,0 +1,27 @@
+use clap::{arg, Args, Command, FromArgMatches as _};
+
+#[derive(Args, Debug)]
+struct DerivedArgs {
+    #[arg(short, long)]
+    derived: bool,
+}
+
+fn main() {
+    let cli = Command::new("CLI").arg(arg!(-b - -built).action(clap::ArgAction::SetTrue));
+    // Augment built args with derived args
+    let cli = DerivedArgs::augment_args(cli);
+
+    let matches = cli.get_matches();
+    println!("Value of built: {:?}", matches.get_flag("built"));
+    println!(
+        "Value of derived via ArgMatches: {:?}",
+        matches.get_flag("derived")
+    );
+
+    // Since DerivedArgs implements FromArgMatches, we can extract it from the unstructured ArgMatches.
+    // This is the main benefit of using derived arguments.
+    let derived_matches = DerivedArgs::from_arg_matches(&matches)
+        .map_err(|err| err.exit())
+        .unwrap();
+    println!("Value of derived: {derived_matches:#?}");
+}

vendor/clap/examples/derive_ref/augment_subcommands.rs

@@ -0,0 +1,21 @@
+use clap::{Command, FromArgMatches as _, Parser, Subcommand as _};
+
+#[derive(Parser, Debug)]
+enum Subcommands {
+    Derived {
+        #[arg(short, long)]
+        derived_flag: bool,
+    },
+}
+
+fn main() {
+    let cli = Command::new("Built CLI");
+    // Augment with derived subcommands
+    let cli = Subcommands::augment_subcommands(cli);
+
+    let matches = cli.get_matches();
+    let derived_subcommands = Subcommands::from_arg_matches(&matches)
+        .map_err(|err| err.exit())
+        .unwrap();
+    println!("Derived subcommands: {derived_subcommands:#?}");
+}

vendor/clap/examples/derive_ref/flatten_hand_args.rs

@@ -0,0 +1,91 @@
+use clap::error::Error;
+use clap::{Arg, ArgAction, ArgMatches, Args, Command, FromArgMatches, Parser};
+
+#[derive(Debug)]
+struct CliArgs {
+    foo: bool,
+    bar: bool,
+    quuz: Option<String>,
+}
+
+impl FromArgMatches for CliArgs {
+    fn from_arg_matches(matches: &ArgMatches) -> Result<Self, Error> {
+        let mut matches = matches.clone();
+        Self::from_arg_matches_mut(&mut matches)
+    }
+    fn from_arg_matches_mut(matches: &mut ArgMatches) -> Result<Self, Error> {
+        Ok(Self {
+            foo: matches.get_flag("foo"),
+            bar: matches.get_flag("bar"),
+            quuz: matches.remove_one::<String>("quuz"),
+        })
+    }
+    fn update_from_arg_matches(&mut self, matches: &ArgMatches) -> Result<(), Error> {
+        let mut matches = matches.clone();
+        self.update_from_arg_matches_mut(&mut matches)
+    }
+    fn update_from_arg_matches_mut(&mut self, matches: &mut ArgMatches) -> Result<(), Error> {
+        self.foo |= matches.get_flag("foo");
+        self.bar |= matches.get_flag("bar");
+        if let Some(quuz) = matches.remove_one::<String>("quuz") {
+            self.quuz = Some(quuz);
+        }
+        Ok(())
+    }
+}
+
+impl Args for CliArgs {
+    fn augment_args(cmd: Command) -> Command {
+        cmd.arg(
+            Arg::new("foo")
+                .short('f')
+                .long("foo")
+                .action(ArgAction::SetTrue),
+        )
+        .arg(
+            Arg::new("bar")
+                .short('b')
+                .long("bar")
+                .action(ArgAction::SetTrue),
+        )
+        .arg(
+            Arg::new("quuz")
+                .short('q')
+                .long("quuz")
+                .action(ArgAction::Set),
+        )
+    }
+    fn augment_args_for_update(cmd: Command) -> Command {
+        cmd.arg(
+            Arg::new("foo")
+                .short('f')
+                .long("foo")
+                .action(ArgAction::SetTrue),
+        )
+        .arg(
+            Arg::new("bar")
+                .short('b')
+                .long("bar")
+                .action(ArgAction::SetTrue),
+        )
+        .arg(
+            Arg::new("quuz")
+                .short('q')
+                .long("quuz")
+                .action(ArgAction::Set),
+        )
+    }
+}
+
+#[derive(Parser, Debug)]
+struct Cli {
+    #[arg(short, long)]
+    top_level: bool,
+    #[command(flatten)]
+    more_args: CliArgs,
+}
+
+fn main() {
+    let args = Cli::parse();
+    println!("{args:#?}");
+}

vendor/clap/examples/derive_ref/hand_subcommand.rs

@@ -0,0 +1,79 @@
+use clap::error::{Error, ErrorKind};
+use clap::{ArgMatches, Args as _, Command, FromArgMatches, Parser, Subcommand};
+
+#[derive(Parser, Debug)]
+struct AddArgs {
+    name: Vec<String>,
+}
+#[derive(Parser, Debug)]
+struct RemoveArgs {
+    #[arg(short, long)]
+    force: bool,
+    name: Vec<String>,
+}
+
+#[derive(Debug)]
+enum CliSub {
+    Add(AddArgs),
+    Remove(RemoveArgs),
+}
+
+impl FromArgMatches for CliSub {
+    fn from_arg_matches(matches: &ArgMatches) -> Result<Self, Error> {
+        match matches.subcommand() {
+            Some(("add", args)) => Ok(Self::Add(AddArgs::from_arg_matches(args)?)),
+            Some(("remove", args)) => Ok(Self::Remove(RemoveArgs::from_arg_matches(args)?)),
+            Some((_, _)) => Err(Error::raw(
+                ErrorKind::InvalidSubcommand,
+                "Valid subcommands are `add` and `remove`",
+            )),
+            None => Err(Error::raw(
+                ErrorKind::MissingSubcommand,
+                "Valid subcommands are `add` and `remove`",
+            )),
+        }
+    }
+    fn update_from_arg_matches(&mut self, matches: &ArgMatches) -> Result<(), Error> {
+        match matches.subcommand() {
+            Some(("add", args)) => *self = Self::Add(AddArgs::from_arg_matches(args)?),
+            Some(("remove", args)) => *self = Self::Remove(RemoveArgs::from_arg_matches(args)?),
+            Some((_, _)) => {
+                return Err(Error::raw(
+                    ErrorKind::InvalidSubcommand,
+                    "Valid subcommands are `add` and `remove`",
+                ))
+            }
+            None => (),
+        };
+        Ok(())
+    }
+}
+
+impl Subcommand for CliSub {
+    fn augment_subcommands(cmd: Command) -> Command {
+        cmd.subcommand(AddArgs::augment_args(Command::new("add")))
+            .subcommand(RemoveArgs::augment_args(Command::new("remove")))
+            .subcommand_required(true)
+    }
+    fn augment_subcommands_for_update(cmd: Command) -> Command {
+        cmd.subcommand(AddArgs::augment_args(Command::new("add")))
+            .subcommand(RemoveArgs::augment_args(Command::new("remove")))
+            .subcommand_required(true)
+    }
+    fn has_subcommand(name: &str) -> bool {
+        matches!(name, "add" | "remove")
+    }
+}
+
+#[derive(Parser, Debug)]
+struct Cli {
+    #[arg(short, long)]
+    top_level: bool,
+    #[command(subcommand)]
+    subcommand: CliSub,
+}
+
+fn main() {
+    let args = Cli::parse();
+    println!("{args:#?}");
+}

vendor/clap/examples/derive_ref/interop_tests.md

@@ -0,0 +1,248 @@
+Following are tests for the interop examples in this directory.
+
+## Augment Args
+
+```console
+$ interop_augment_args
+Value of built: false
+Value of derived via ArgMatches: false
+Value of derived: DerivedArgs {
+    derived: false,
+}
+
+```
+
+```console
+$ interop_augment_args -b --derived
+Value of built: true
+Value of derived via ArgMatches: true
+Value of derived: DerivedArgs {
+    derived: true,
+}
+
+```
+
+```console
+$ interop_augment_args -d --built
+Value of built: true
+Value of derived via ArgMatches: true
+Value of derived: DerivedArgs {
+    derived: true,
+}
+
+```
+
+```console
+$ interop_augment_args --unknown
+? failed
+error: unexpected argument '--unknown' found
+
+Usage: interop_augment_args[EXE] [OPTIONS]
+
+For more information, try '--help'.
+
+```
+
+## Augment Subcommands
+
+```console
+$ interop_augment_subcommands
+? failed
+error: A subcommand is required but one was not provided.
+```
+
+```console
+$ interop_augment_subcommands derived
+Derived subcommands: Derived {
+    derived_flag: false,
+}
+
+```
+
+```console
+$ interop_augment_subcommands derived --derived-flag
+Derived subcommands: Derived {
+    derived_flag: true,
+}
+
+```
+
+```console
+$ interop_augment_subcommands derived --unknown
+? failed
+error: unexpected argument '--unknown' found
+
+Usage: interop_augment_subcommands[EXE] derived [OPTIONS]
+
+For more information, try '--help'.
+
+```
+
+```console
+$ interop_augment_subcommands unknown
+? failed
+error: unrecognized subcommand 'unknown'
+
+Usage: interop_augment_subcommands[EXE] [COMMAND]
+
+For more information, try '--help'.
+
+```
+
+## Hand-Implemented Subcommand
+
+```console
+$ interop_hand_subcommand
+? failed
+Usage: interop_hand_subcommand[EXE] [OPTIONS] <COMMAND>
+
+Commands:
+  add     
+  remove  
+  help    Print this message or the help of the given subcommand(s)
+
+Options:
+  -t, --top-level  
+  -h, --help       Print help
+
+```
+
+```console
+$ interop_hand_subcommand add
+Cli {
+    top_level: false,
+    subcommand: Add(
+        AddArgs {
+            name: [],
+        },
+    ),
+}
+
+```
+
+```console
+$ interop_hand_subcommand add a b c
+Cli {
+    top_level: false,
+    subcommand: Add(
+        AddArgs {
+            name: [
+                "a",
+                "b",
+                "c",
+            ],
+        },
+    ),
+}
+
+```
+
+```console
+$ interop_hand_subcommand add --unknown
+? failed
+error: unexpected argument '--unknown' found
+
+  tip: to pass '--unknown' as a value, use '-- --unknown'
+
+Usage: interop_hand_subcommand[EXE] add [NAME]...
+
+For more information, try '--help'.
+
+```
+
+```console
+$ interop_hand_subcommand remove
+Cli {
+    top_level: false,
+    subcommand: Remove(
+        RemoveArgs {
+            force: false,
+            name: [],
+        },
+    ),
+}
+
+```
+
+```console
+$ interop_hand_subcommand remove --force a b c
+Cli {
+    top_level: false,
+    subcommand: Remove(
+        RemoveArgs {
+            force: true,
+            name: [
+                "a",
+                "b",
+                "c",
+            ],
+        },
+    ),
+}
+
+```
+
+```console
+$ interop_hand_subcommand unknown
+? failed
+error: unrecognized subcommand 'unknown'
+
+Usage: interop_hand_subcommand[EXE] [OPTIONS] <COMMAND>
+
+For more information, try '--help'.
+
+```
+
+## Flatten Hand-Implemented Args
+
+```console
+$ interop_flatten_hand_args
+Cli {
+    top_level: false,
+    more_args: CliArgs {
+        foo: false,
+        bar: false,
+        quuz: None,
+    },
+}
+
+```
+
+```console
+$ interop_flatten_hand_args -f --bar
+Cli {
+    top_level: false,
+    more_args: CliArgs {
+        foo: true,
+        bar: true,
+        quuz: None,
+    },
+}
+
+```
+
+```console
+$ interop_flatten_hand_args --quuz abc
+Cli {
+    top_level: false,
+    more_args: CliArgs {
+        foo: false,
+        bar: false,
+        quuz: Some(
+            "abc",
+        ),
+    },
+}
+
+```
+
+```console
+$ interop_flatten_hand_args --unknown
+? failed
+error: unexpected argument '--unknown' found
+
+Usage: interop_flatten_hand_args[EXE] [OPTIONS]
+
+For more information, try '--help'.
+
+```