preserves-tools: deps: Update to clap 3 release.

This was previously using a beta release. This helps move towards
updating to the current v4 release.

implementations/rust/preserves-tools/Cargo.toml

@@ -14,9 +14,8 @@ preserves-path = { path = "../preserves-path", version = "4.1.0"}
 preserves-schema = { path = "../preserves-schema", version = "3.1.0"}
 
 bytes = "1.0"
-clap = "=3.0.0-beta.2"
+clap = { version = "3", features = ["derive"] }
-clap_generate = "=3.0.0-beta.2"
+clap_complete = "3"
-clap_derive = "=3.0.0-beta.2"
 
 [package.metadata.workspaces]
 independent = true

implementations/rust/preserves-tools/src/bin/preserves-tool.rs

@@ -2,10 +2,8 @@ use bytes::Buf;
 use bytes::BufMut;
 use bytes::BytesMut;
 
-use clap::ArgEnum;
+use clap:: {ArgEnum, Command, IntoApp, Parser, value_parser};
-use clap::Clap;
+use clap_complete::{generate, Generator, Shell};
-use clap::IntoApp;
-use clap_generate::{generate, generators};
 
 use preserves::value::IOBinarySource;
 use preserves::value::IOValue;
@@ -55,15 +53,6 @@ enum CommasFormat {
     Terminating,
 }
 
-#[derive(ArgEnum, Clone, Debug)]
-enum CompletionDialect {
-    Bash,
-    Zsh,
-    PowerShell,
-    Fish,
-    Elvish,
-}
-
 #[derive(ArgEnum, Clone, Copy, Debug)]
 enum Boolish {
     #[clap(alias = "no", alias = "n", alias = "off", alias = "0", alias = "false")]
@@ -94,7 +83,7 @@ enum SelectOutput {
     Set,
 }
 
-#[derive(Clap, Clone, Debug)]
+#[derive(Clone, Debug, Parser)]
 struct Convert {
     // #[clap(long, arg_enum, default_value = "none")]
     // input_encoding: Encoding,
@@ -149,7 +138,7 @@ enum StringInputTerminator {
     Nul,
 }
 
-#[derive(Clap, Clone, Debug)]
+#[derive(Clone, Debug, Parser)]
 struct StringQuotation {
     #[clap(long, arg_enum, default_value = "eof")]
     input_terminator: StringInputTerminator,
@@ -161,14 +150,14 @@ struct StringQuotation {
     escape_spaces: bool,
 }
 
-#[derive(Clap, Clone, Debug)]
+#[derive(Clone, Debug, Parser)]
 enum QuotationOutput {
     String(StringQuotation),
     ByteString,
     Symbol(StringQuotation),
 }
 
-#[derive(Clap, Clone, Debug)]
+#[derive(Clone, Debug, Parser)]
 struct Quote {
     #[clap(long, short, arg_enum, default_value = "text")]
     output_format: OutputFormat,
@@ -177,35 +166,34 @@ struct Quote {
     output: QuotationOutput,
 }
 
-#[derive(Clap, Clone, Debug)]
+#[derive(Clone, Debug, Parser)]
 enum Subcommand {
     Completions {
-        #[clap(arg_enum, value_name = "dialect")]
+        #[clap(value_parser=value_parser!(Shell))]
-        dialect: CompletionDialect,
+        shell: Shell,
     },
     Convert(Convert),
     Quote(Quote),
 }
 
-#[derive(Clap, Clone, Debug)]
+#[derive(Clone, Debug, Parser)]
+#[clap(name="preserves-tool")]
 #[clap(version)]
 struct CommandLine {
     #[clap(subcommand)]
     command: Subcommand,
 }
 
+fn print_completions<G: Generator>(gen: G, cmd: &mut Command) {
+    generate(gen, cmd, cmd.get_name().to_string(), &mut io::stdout());
+}
+
 fn main() -> io::Result<()> {
     let args = CommandLine::parse();
     Ok(match args.command {
-        Subcommand::Completions { dialect } => {
+        Subcommand::Completions { shell } => {
-            let mut app = CommandLine::into_app();
+            let mut cmd = CommandLine::into_app();
-            match dialect {
+            print_completions(shell, &mut cmd);
-                CompletionDialect::Bash => generate::<generators::Bash, _>(&mut app, "preserves-tool", &mut io::stdout()),
-                CompletionDialect::Zsh => generate::<generators::Zsh, _>(&mut app, "preserves-tool", &mut io::stdout()),
-                CompletionDialect::PowerShell => generate::<generators::PowerShell, _>(&mut app, "preserves-tool", &mut io::stdout()),
-                CompletionDialect::Fish => generate::<generators::Fish, _>(&mut app, "preserves-tool", &mut io::stdout()),
-                CompletionDialect::Elvish => generate::<generators::Elvish, _>(&mut app, "preserves-tool", &mut io::stdout()),
-            }
         },
         Subcommand::Convert(c) => convert(c)?,
         Subcommand::Quote(q) => quote(q)?,