mirror of
https://github.com/clap-rs/clap
synced 2024-12-13 14:22:34 +00:00
3f2625fc5e
This supersedes #4692
164 lines
4.2 KiB
Rust
164 lines
4.2 KiB
Rust
use std::ffi::OsStr;
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use std::ffi::OsString;
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use std::path::PathBuf;
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use clap::{Args, Parser, Subcommand, ValueEnum};
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/// A fictional versioning CLI
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#[derive(Debug, Parser)] // requires `derive` feature
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#[command(name = "git")]
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#[command(about = "A fictional versioning CLI", long_about = None)]
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struct Cli {
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#[command(subcommand)]
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command: Commands,
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}
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#[derive(Debug, Subcommand)]
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enum Commands {
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/// Clones repos
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#[command(arg_required_else_help = true)]
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Clone {
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/// The remote to clone
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remote: String,
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},
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/// Compare two commits
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Diff {
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#[arg(value_name = "COMMIT")]
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base: Option<OsString>,
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#[arg(value_name = "COMMIT")]
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head: Option<OsString>,
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#[arg(last = true)]
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path: Option<OsString>,
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#[arg(
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long,
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require_equals = true,
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value_name = "WHEN",
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num_args = 0..=1,
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default_value_t = ColorWhen::Auto,
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default_missing_value = "always",
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value_enum
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)]
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color: ColorWhen,
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},
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/// pushes things
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#[command(arg_required_else_help = true)]
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Push {
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/// The remote to target
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remote: String,
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},
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/// adds things
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#[command(arg_required_else_help = true)]
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Add {
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/// Stuff to add
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#[arg(required = true)]
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path: Vec<PathBuf>,
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},
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Stash(StashArgs),
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#[command(external_subcommand)]
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External(Vec<OsString>),
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}
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#[derive(ValueEnum, Copy, Clone, Debug, PartialEq, Eq)]
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enum ColorWhen {
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Always,
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Auto,
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Never,
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}
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impl std::fmt::Display for ColorWhen {
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fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
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self.to_possible_value()
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.expect("no values are skipped")
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.get_name()
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.fmt(f)
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}
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}
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#[derive(Debug, Args)]
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#[command(args_conflicts_with_subcommands = true)]
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struct StashArgs {
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#[command(subcommand)]
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command: Option<StashCommands>,
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#[command(flatten)]
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push: StashPushArgs,
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}
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#[derive(Debug, Subcommand)]
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enum StashCommands {
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Push(StashPushArgs),
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Pop { stash: Option<String> },
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Apply { stash: Option<String> },
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}
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#[derive(Debug, Args)]
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struct StashPushArgs {
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#[arg(short, long)]
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message: Option<String>,
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}
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fn main() {
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let args = Cli::parse();
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match args.command {
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Commands::Clone { remote } => {
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println!("Cloning {remote}");
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}
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Commands::Diff {
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mut base,
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mut head,
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mut path,
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color,
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} => {
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if path.is_none() {
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path = head;
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head = None;
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if path.is_none() {
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path = base;
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base = None;
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}
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}
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let base = base
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.as_deref()
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.map(|s| s.to_str().unwrap())
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.unwrap_or("stage");
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let head = head
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.as_deref()
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.map(|s| s.to_str().unwrap())
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.unwrap_or("worktree");
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let path = path.as_deref().unwrap_or_else(|| OsStr::new(""));
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println!(
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"Diffing {}..{} {} (color={})",
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base,
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head,
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path.to_string_lossy(),
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color
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);
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}
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Commands::Push { remote } => {
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println!("Pushing to {remote}");
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}
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Commands::Add { path } => {
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println!("Adding {path:?}");
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}
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Commands::Stash(stash) => {
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let stash_cmd = stash.command.unwrap_or(StashCommands::Push(stash.push));
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match stash_cmd {
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StashCommands::Push(push) => {
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println!("Pushing {push:?}");
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}
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StashCommands::Pop { stash } => {
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println!("Popping {stash:?}");
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}
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StashCommands::Apply { stash } => {
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println!("Applying {stash:?}");
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}
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}
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}
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Commands::External(args) => {
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println!("Calling out to {:?} with {:?}", &args[0], &args[1..]);
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}
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}
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// Continued program logic goes here...
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}
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