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46:Ta1d,{"@context":"https://schema.org","@graph":[{"@type":"WebSite","@id":"https://app.codemod.com/registry#website","url":"https://app.codemod.com/registry","name":"Codemod Registry"},{"@type":"Organization","@id":"https://app.codemod.com#org","name":"Vinh Nguyen","url":"https://app.codemod.com","logo":"https://avatars.githubusercontent.com/u/1097578?v=4"},{"@type":"BreadcrumbList","@id":"https://app.codemod.com/registry/clap-v3-to-v4#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Registry","item":"https://app.codemod.com/registry"},{"@type":"ListItem","position":2,"name":"clap-v3-to-v4","item":"https://app.codemod.com/registry/clap-v3-to-v4"}]},{"@type":"WebPage","@id":"https://app.codemod.com/registry/clap-v3-to-v4#webpage","url":"https://app.codemod.com/registry/clap-v3-to-v4","name":"clap-v3-to-v4 - Codemod Registry","description":"Migrate Rust clap CLI parser from v3 to v4: derive/value enum renames, builder API updates to num_args, ErrorKind renames, and AppSettings cleanup","isPartOf":{"@id":"https://app.codemod.com/registry#website"},"author":{"@id":"https://app.codemod.com#org"},"breadcrumb":{"@id":"https://app.codemod.com/registry/clap-v3-to-v4#breadcrumb"},"mainEntity":{"@id":"https://app.codemod.com/registry/clap-v3-to-v4#sourcecode"}},{"@type":"SoftwareSourceCode","@id":"https://app.codemod.com/registry/clap-v3-to-v4#sourcecode","name":"clap-v3-to-v4","description":"Migrate Rust clap CLI parser from v3 to v4: derive/value enum renames, builder API updates to num_args, ErrorKind renames, and AppSettings cleanup","url":"https://app.codemod.com/registry/clap-v3-to-v4","publisher":{"@id":"https://app.codemod.com#org"},"image":"https://avatars.githubusercontent.com/u/1097578?v=4","isAccessibleForFree":true,"license":"MIT","version":"1.0.13","keywords":["rust","clap","cli","migration","v3-to-v4","argument-parser","derive","builder"],"datePublished":"2026-03-28 07:57:16.40497+00","dateModified":"2026-05-30 07:22:07.81133+00"},{"@type":"SoftwareApplication","@id":"https://app.codemod.com/registry/clap-v3-to-v4#app","name":"clap-v3-to-v4 codemod","description":"Migrate Rust clap CLI parser from v3 to v4: derive/value enum renames, builder API updates to num_args, ErrorKind renames, and AppSettings cleanup","url":"https://app.codemod.com/registry/clap-v3-to-v4","publisher":{"@id":"https://app.codemod.com#org"},"softwareVersion":"1.0.13","applicationCategory":"DeveloperApplication","operatingSystem":"Cross-platform","offers":{"@type":"Offer","price":"0","priceCurrency":"USD","availability":"https://schema.org/InStock"}}]}48:Ta5c,# clap-v3-to-v4 Automate 80%+ of the Rust [clap](https://github.com/clap-rs/clap) CLI parser migration from v3 to v4. ## What it does ### Derive API transforms - `#[clap(...)]` on structs/enums → `#[command(...)]` - `#[clap(...)]` on fields → `#[arg(...)]` - `arg_enum` → `value_enum` - `ArgEnum` derives → `ValueEnum` - Removes redundant `value_parser` and `action` attributes (implicit in v4) ### Builder API transforms - `.takes_value(true)` → `.num_args(1)` - `.multiple_values(true)` → `.num_args(1..)` - `.min_values(N)` → `.num_args(N..)` - `.max_values(N)` → `.num_args(1..=N)` - `.number_of_values(N)` → `.num_args(N)` - `.multiple(true)` → `.num_args(1..)` - Removes `.takes_value(false)` (now default) - Removes `.require_value_delimiter(true)` (use `.value_delimiter(',')`) - Removes `.setting(AppSettings::ColoredHelp)` (now default) - Removes now-unused `AppSettings` imports when `ColoredHelp` was the only use ### Error kind renames - `ErrorKind::EmptyValue` → `ErrorKind::InvalidValue` - `ErrorKind::UnrecognizedSubcommand` → `ErrorKind::InvalidSubcommand` ### Cargo.toml follow-up - Update `clap = "3.x"` → `clap = "4"` - Update `clap = { version = "3.x", ... }` → `clap = { version = "4", ... }` ## Usage ```bash # Validate the workflow bunx codemod@latest workflow validate -w workflow.yaml # Dry run against your project bunx codemod@latest workflow run -w workflow.yaml --target /path/to/your/rust/project # Run the published package from the registry bunx codemod@latest clap-v3-to-v4 --target /path/to/your/rust/project ``` ## Manual follow-up After running, you should: 1. **Review `Cargo.toml` updates** for any uncommon clap dependency formatting not covered by deterministic rewrites 2. **Remove the `deprecated` feature flag** if present 3. **Run `cargo check`** to catch remaining compile errors 4. **Verify `num_args` ranges** match your intended behavior 5. **Check `ArgAction` usage** — v4 changed default actions for flags 6. **Update custom help templates** — format changed in v4 7. **Remove unused imports** (e.g., `AppSettings` if no longer needed) 8. **Run `cargo test`** to verify behavior ## Development ```bash # Run tests bunx codemod@latest jssg test -l rust ./scripts/codemod.ts -v --strictness loose # Validate workflow bunx codemod@latest workflow validate -w workflow.yaml ``` ## References - [clap 4.0 announcement](https://epage.github.io/blog/2022/09/clap4/) - [clap CHANGELOG migration guide](https://github.com/clap-rs/clap/blob/master/CHANGELOG.md#400---2022-09-28) - [clap v4 docs](https://docs.rs/clap/4.0.0/clap/index.html) ## License MIT 18:[["$","script",null,{"type":"application/ld+json","dangerouslySetInnerHTML":{"__html":"$46"}}],["$","$L47",null,{"state":{"mutations":[],"queries":[{"state":{"data":{"json":{"id":"05af32d4-d2de-4dea-9c9d-249a85e1f61a","name":"clap-v3-to-v4","displayName":"clap-v3-to-v4","description":"Migrate Rust clap CLI parser from v3 to v4: derive/value enum renames, builder API updates to num_args, ErrorKind renames, and AppSettings cleanup","scope":null,"visibility":"public","downloadCount":72,"executionCount":9,"createdAt":"2026-03-28 07:57:16.40497+00","updatedAt":"2026-05-30 07:22:07.81133+00","latestVersion":"1.0.13","keywords":["rust","clap","cli","migration","v3-to-v4","argument-parser","derive","builder"],"starCount":2,"author":"Vinh Nguyen 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Arg::new(\"name\")\n .short('n')\n .takes_value(true),\n )\n}\n","output":"use clap::{App, Arg};\n\nfn build_cli() -> App<'static> {\n App::new(\"test\")\n .arg(\n Arg::new(\"name\")\n .short('n')\n .num_args(1..),\n )\n}\n","filename":"input.rs"},{"name":"builder-api","path":"tests/builder-api","input":"use clap::{Arg, Command, AppSettings, ErrorKind};\n\nfn build_cli() -> Command<'static> {\n Command::new(\"myapp\")\n .setting(AppSettings::ColoredHelp)\n .arg(\n Arg::new(\"input\")\n .short('i')\n .long(\"input\")\n .takes_value(true)\n .multiple_values(true)\n .min_values(1)\n .max_values(5)\n .require_value_delimiter(true),\n )\n .arg(\n Arg::new(\"verbose\")\n .short('v')\n .takes_value(false)\n .multiple(true),\n )\n .arg(\n Arg::new(\"config\")\n .long(\"config\")\n .number_of_values(2),\n )\n}\n\nfn handle_error(kind: ErrorKind) {\n match kind {\n ErrorKind::EmptyValue => println!(\"empty\"),\n ErrorKind::UnrecognizedSubcommand => println!(\"unknown\"),\n _ => println!(\"other\"),\n }\n}\n","output":"use clap::{Arg, Command, ErrorKind};\n\nfn build_cli() -> Command<'static> {\n Command::new(\"myapp\")\n .arg(\n Arg::new(\"input\")\n .short('i')\n .long(\"input\")\n .num_args(1..=5),\n )\n .arg(\n Arg::new(\"verbose\")\n .short('v')\n .num_args(1..),\n )\n .arg(\n Arg::new(\"config\")\n .long(\"config\")\n .num_args(2),\n )\n}\n\nfn handle_error(kind: ErrorKind) {\n match kind {\n ErrorKind::InvalidValue => println!(\"empty\"),\n ErrorKind::InvalidSubcommand => println!(\"unknown\"),\n _ => println!(\"other\"),\n }\n}\n","filename":"input.rs"},{"name":"derive-attributes","path":"tests/derive-attributes","input":"use clap::Parser;\n\n/// Simple program to greet a person\n#[derive(Parser, Debug)]\n#[clap(author, version, about, long_about = None)]\nstruct Args {\n /// Name of the person to greet\n #[clap(short, long, value_parser)]\n name: String,\n\n /// Number of times to greet\n #[clap(short, long, value_parser, default_value_t = 1)]\n count: u8,\n\n /// Optional output file\n #[clap(short, long)]\n output: Option,\n}\n","output":"use clap::Parser;\n\n/// Simple program to greet a person\n#[derive(Parser, Debug)]\n#[command(author, version, about, long_about = None)]\nstruct Args {\n /// Name of the person to greet\n #[arg(short, long)]\n name: String,\n\n /// Number of times to greet\n #[arg(short, long, default_value_t = 1)]\n count: u8,\n\n /// Optional output file\n #[arg(short, long)]\n output: Option,\n}\n","filename":"input.rs"},{"name":"error-kind-dedup","path":"tests/error-kind-dedup","input":"use clap::{App, ErrorKind};\n\nfn error_handling() {\n let app = App::new(\"test\");\n let result = app.try_get_matches();\n\n if let Err(e) = result {\n match e.kind {\n ErrorKind::EmptyValue => {\n println!(\"empty\");\n }\n ErrorKind::InvalidValue => {\n println!(\"invalid\");\n }\n ErrorKind::UnrecognizedSubcommand => {\n println!(\"unknown\");\n }\n _ => {\n println!(\"other\");\n }\n }\n }\n}\n","output":"use clap::{App, ErrorKind};\n\nfn error_handling() {\n let app = App::new(\"test\");\n let result = app.try_get_matches();\n\n if let Err(e) = result {\n match e.kind {\n ErrorKind::InvalidValue => {\n println!(\"empty\");\n }\n ErrorKind::InvalidSubcommand => {\n println!(\"unknown\");\n }\n _ => {\n println!(\"other\");\n }\n }\n }\n}\n","filename":"input.rs"},{"name":"integration-mixed","path":"tests/integration-mixed","input":"use clap::{AppSettings, Arg, Command, ErrorKind, Parser};\n\n#[derive(Parser, Debug)]\n#[clap(author, version)]\nstruct Cli {\n #[clap(short, long, value_parser)]\n input: String,\n}\n\nfn builder() -> Command<'static> {\n Command::new(\"demo\")\n .setting(AppSettings::ColoredHelp)\n .arg(\n Arg::new(\"files\")\n .takes_value(true)\n .multiple_values(true)\n .max_values(3),\n )\n}\n\nfn map(kind: ErrorKind) -> ErrorKind {\n match kind {\n ErrorKind::EmptyValue => ErrorKind::EmptyValue,\n ErrorKind::UnrecognizedSubcommand => ErrorKind::UnrecognizedSubcommand,\n _ => kind,\n }\n}\n","output":"use clap::{Arg, Command, ErrorKind, Parser};\n\n#[derive(Parser, Debug)]\n#[command(author, version)]\nstruct Cli {\n #[arg(short, long)]\n input: String,\n}\n\nfn builder() -> Command<'static> {\n Command::new(\"demo\")\n .arg(\n Arg::new(\"files\")\n .num_args(1..=3),\n )\n}\n\nfn map(kind: ErrorKind) -> ErrorKind {\n match kind {\n ErrorKind::InvalidValue => ErrorKind::InvalidValue,\n ErrorKind::InvalidSubcommand => ErrorKind::InvalidSubcommand,\n _ => kind,\n }\n}\n","filename":"input.rs"},{"name":"no-op","path":"tests/no-op","input":"use clap::Parser;\n\n#[derive(Parser, Debug)]\n#[command(author, version, about)]\nstruct Args {\n #[arg(short, long)]\n name: String,\n\n #[arg(short, long, default_value_t = 1)]\n count: u8,\n}\n\nfn main() {\n let args = Args::parse();\n println!(\"Hello {}!\", args.name);\n}\n","output":"use clap::Parser;\n\n#[derive(Parser, Debug)]\n#[command(author, version, about)]\nstruct Args {\n #[arg(short, long)]\n name: String,\n\n #[arg(short, long, default_value_t = 1)]\n count: u8,\n}\n\nfn main() {\n let args = Args::parse();\n println!(\"Hello {}!\", args.name);\n}\n","filename":"input.rs"},{"name":"non-clap-no-op","path":"tests/non-clap-no-op","input":"struct Builder;\n\nimpl Builder {\n fn takes_value(self, _enabled: bool) -> Self {\n self\n }\n\n fn multiple_values(self, _enabled: bool) -> Self {\n self\n }\n\n fn min_values(self, _count: usize) -> Self {\n self\n }\n}\n\nenum ErrorKind {\n EmptyValue,\n UnrecognizedSubcommand,\n}\n\nfn build() {\n let builder = Builder;\n let _ = builder\n .takes_value(true)\n .multiple_values(true)\n .min_values(2);\n\n let kind = ErrorKind::EmptyValue;\n let _ = match kind {\n ErrorKind::EmptyValue => 0,\n ErrorKind::UnrecognizedSubcommand => 1,\n };\n}\n","output":"struct Builder;\n\nimpl Builder {\n fn takes_value(self, _enabled: bool) -> Self {\n self\n }\n\n fn multiple_values(self, _enabled: bool) -> Self {\n self\n }\n\n fn min_values(self, _count: usize) -> Self {\n self\n }\n}\n\nenum ErrorKind {\n EmptyValue,\n UnrecognizedSubcommand,\n}\n\nfn build() {\n let builder = Builder;\n let _ = builder\n .takes_value(true)\n .multiple_values(true)\n .min_values(2);\n\n let kind = ErrorKind::EmptyValue;\n let _ = match kind {\n ErrorKind::EmptyValue => 0,\n ErrorKind::UnrecognizedSubcommand => 1,\n };\n}\n","filename":"input.rs"},{"name":"num-args-normalization","path":"tests/num-args-normalization","input":"use clap::{Arg, Command};\n\nfn build_cli() -> Command<'static> {\n Command::new(\"myapp\")\n .arg(\n Arg::new(\"files\")\n .num_args(2..=5),\n )\n .arg(\n Arg::new(\"tags\")\n .num_args(3..=7),\n )\n .arg(\n Arg::new(\"mode\")\n .num_args(1),\n )\n}\n","output":"use clap::{Arg, Command};\n\nfn build_cli() -> Command<'static> {\n Command::new(\"myapp\")\n .arg(\n Arg::new(\"files\")\n .num_args(2..=5),\n )\n .arg(\n Arg::new(\"tags\")\n .num_args(3..=7),\n )\n .arg(\n Arg::new(\"mode\")\n .num_args(1),\n )\n}\n","filename":"input.rs"},{"name":"takes-value-cleanup","path":"tests/takes-value-cleanup","input":"// Tests removal of takes_value from derive attrs and setting = AppSettings:: from #[command].\nuse clap::{AppSettings, Parser, Subcommand};\n\n#[derive(Parser, Debug)]\n#[clap(setting = AppSettings::SubcommandRequiredElseHelp)]\npub struct Cli {\n #[clap(subcommand)]\n pub command: Commands,\n\n /// Model override\n #[clap(long, takes_value = true)]\n pub model: Option,\n\n /// Max turns before auto-stop\n #[clap(long, takes_value = true, default_value = \"100\")]\n pub max_turns: u32,\n\n /// Suppress output\n #[clap(long, takes_value = false)]\n pub quiet: bool,\n}\n\n#[derive(Subcommand, Debug)]\npub enum Commands {\n Ask {\n #[clap(takes_value = true)]\n prompt: String,\n },\n}\n","output":"// Tests removal of takes_value from derive attrs and setting = AppSettings:: from #[command].\nuse clap::{Parser, Subcommand};\n\n#[derive(Parser, Debug)]\npub struct Cli {\n #[command(subcommand)]\n pub command: Commands,\n\n /// Model override\n #[arg(long)]\n pub model: Option,\n\n /// Max turns before auto-stop\n #[arg(long, default_value = \"100\")]\n pub max_turns: u32,\n\n /// Suppress output\n #[arg(long)]\n pub quiet: bool,\n}\n\n#[derive(Subcommand, Debug)]\npub enum Commands {\n Ask {\n #[arg()]\n prompt: String,\n },\n}\n","filename":"input.rs"},{"name":"value-enum","path":"tests/value-enum","input":"use clap::Parser;\n\n#[derive(Parser)]\n#[clap(author, version)]\nstruct Cli {\n #[clap(arg_enum)]\n mode: Mode,\n}\n\n#[derive(Clone, clap::ArgEnum)]\nenum Mode {\n Fast,\n Slow,\n}\n","output":"use clap::Parser;\n\n#[derive(Parser)]\n#[command(author, version)]\nstruct Cli {\n #[arg(value_enum)]\n mode: Mode,\n}\n\n#[derive(Clone, clap::ValueEnum)]\nenum Mode {\n Fast,\n Slow,\n}\n","filename":"input.rs"}]},"defaultWorkflowName":"default","createdAt":"2026-05-30T07:22:07.811Z","updatedAt":"2026-09-05 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ErrorKind renames, and AppSettings cleanup","manifest":{"name":"clap-v3-to-v4","author":"Vinh Nguyen ","license":"MIT","targets":{"versions":{},"languages":["rust"],"frameworks":[]},"version":"1.0.12","keywords":["rust","clap","cli","migration","v3-to-v4","argument-parser","derive","builder"],"registry":{"access":"public","visibility":"public"},"workflow":"workflow.yaml","description":"Migrate Rust clap CLI parser from v3 to v4: derive/value enum renames, builder API updates to num_args, ErrorKind renames, and AppSettings cleanup","dependencies":[],"schema_version":"1.0"},"checksum":"89b1a9e6ca03847392a04a01b9d84871414e3781f1ed696464b9133580232467","size":11399,"downloadUrl":"https://registry-cdn.codemod.com/prod/packages/clap-v3-to-v4/1.0.12/public.tar.gz","aiGenerated":false,"sourceArchiveS3Key":null,"targets":{"languages":["typescript"],"frameworks":[]},"dependencies":[],"languages":["rust"],"stepTypes":["js-ast-grep","install-skill"],"workflowMetadata":{"nodes":[{"id":"jssg-apply","name":"Transform Rust source files","steps":[{"name":"Migrate clap v3 APIs to v4","type":"js-ast-grep","language":"rust"},{"name":"Install clap-v3-to-v4 skill","type":"install-skill"}]}]},"validated":false,"validationErrors":null,"publishedBy":"30d9959c-478f-4ef5-9201-c707980a4c14","deprecated":false,"deprecationMessage":null,"downloadCount":3,"cachedTestCases":{"input":"use clap::{App, Arg, AppSettings};\n\nfn build_cli() -> App<'static> {\n App::new(\"test\")\n .setting(AppSettings::ColoredHelp)\n .setting(AppSettings::ArgRequiredElseHelp)\n .arg(\n Arg::new(\"name\")\n .short('n')\n .takes_value(true),\n )\n}\n","output":"use clap::{App, Arg};\n\nfn build_cli() -> App<'static> {\n App::new(\"test\")\n .arg(\n Arg::new(\"name\")\n .short('n')\n .num_args(1..),\n )\n}\n","isValid":true,"examples":[{"name":"appsettings-full-removal","path":"tests/appsettings-full-removal","input":"use clap::{App, Arg, AppSettings};\n\nfn build_cli() -> App<'static> {\n App::new(\"test\")\n .setting(AppSettings::ColoredHelp)\n .setting(AppSettings::ArgRequiredElseHelp)\n .arg(\n Arg::new(\"name\")\n .short('n')\n .takes_value(true),\n )\n}\n","output":"use clap::{App, Arg};\n\nfn build_cli() -> App<'static> {\n App::new(\"test\")\n .arg(\n Arg::new(\"name\")\n .short('n')\n .num_args(1..),\n )\n}\n","filename":"input.rs"},{"name":"builder-api","path":"tests/builder-api","input":"use clap::{Arg, Command, AppSettings, ErrorKind};\n\nfn build_cli() -> Command<'static> {\n Command::new(\"myapp\")\n .setting(AppSettings::ColoredHelp)\n .arg(\n Arg::new(\"input\")\n .short('i')\n .long(\"input\")\n .takes_value(true)\n .multiple_values(true)\n .min_values(1)\n .max_values(5)\n .require_value_delimiter(true),\n )\n .arg(\n Arg::new(\"verbose\")\n .short('v')\n .takes_value(false)\n .multiple(true),\n )\n .arg(\n Arg::new(\"config\")\n .long(\"config\")\n .number_of_values(2),\n )\n}\n\nfn handle_error(kind: ErrorKind) {\n match kind {\n ErrorKind::EmptyValue => println!(\"empty\"),\n ErrorKind::UnrecognizedSubcommand => println!(\"unknown\"),\n _ => println!(\"other\"),\n }\n}\n","output":"use clap::{Arg, Command, ErrorKind};\n\nfn build_cli() -> Command<'static> {\n Command::new(\"myapp\")\n .arg(\n Arg::new(\"input\")\n .short('i')\n .long(\"input\")\n .num_args(1..=5),\n )\n .arg(\n Arg::new(\"verbose\")\n .short('v')\n .num_args(1..),\n )\n .arg(\n Arg::new(\"config\")\n .long(\"config\")\n .num_args(2),\n )\n}\n\nfn handle_error(kind: ErrorKind) {\n match kind {\n ErrorKind::InvalidValue => println!(\"empty\"),\n ErrorKind::InvalidSubcommand => println!(\"unknown\"),\n _ => println!(\"other\"),\n }\n}\n","filename":"input.rs"},{"name":"derive-attributes","path":"tests/derive-attributes","input":"use clap::Parser;\n\n/// Simple program to greet a person\n#[derive(Parser, Debug)]\n#[clap(author, version, about, long_about = None)]\nstruct Args {\n /// Name of the person to greet\n #[clap(short, long, value_parser)]\n name: String,\n\n /// Number of times to greet\n #[clap(short, long, value_parser, default_value_t = 1)]\n count: u8,\n\n /// Optional output file\n #[clap(short, long)]\n output: Option,\n}\n","output":"use clap::Parser;\n\n/// Simple program to greet a person\n#[derive(Parser, Debug)]\n#[command(author, version, about, long_about = None)]\nstruct Args {\n /// Name of the person to greet\n #[arg(short, long)]\n name: String,\n\n /// Number of times to greet\n #[arg(short, long, default_value_t = 1)]\n count: u8,\n\n /// Optional output file\n #[arg(short, long)]\n output: Option,\n}\n","filename":"input.rs"},{"name":"error-kind-dedup","path":"tests/error-kind-dedup","input":"use clap::{App, ErrorKind};\n\nfn error_handling() {\n let app = App::new(\"test\");\n let result = app.try_get_matches();\n\n if let Err(e) = result {\n match e.kind {\n ErrorKind::EmptyValue => {\n println!(\"empty\");\n }\n ErrorKind::InvalidValue => {\n println!(\"invalid\");\n }\n ErrorKind::UnrecognizedSubcommand => {\n println!(\"unknown\");\n }\n _ => {\n println!(\"other\");\n }\n }\n }\n}\n","output":"use clap::{App, ErrorKind};\n\nfn error_handling() {\n let app = App::new(\"test\");\n let result = app.try_get_matches();\n\n if let Err(e) = result {\n match e.kind {\n ErrorKind::InvalidValue => {\n println!(\"empty\");\n }\n ErrorKind::InvalidSubcommand => {\n println!(\"unknown\");\n }\n _ => {\n println!(\"other\");\n }\n }\n }\n}\n","filename":"input.rs"},{"name":"integration-mixed","path":"tests/integration-mixed","input":"use clap::{AppSettings, Arg, Command, ErrorKind, Parser};\n\n#[derive(Parser, Debug)]\n#[clap(author, version)]\nstruct Cli {\n #[clap(short, long, value_parser)]\n input: String,\n}\n\nfn builder() -> Command<'static> {\n Command::new(\"demo\")\n .setting(AppSettings::ColoredHelp)\n .arg(\n Arg::new(\"files\")\n .takes_value(true)\n .multiple_values(true)\n .max_values(3),\n )\n}\n\nfn map(kind: ErrorKind) -> ErrorKind {\n match kind {\n ErrorKind::EmptyValue => ErrorKind::EmptyValue,\n ErrorKind::UnrecognizedSubcommand => ErrorKind::UnrecognizedSubcommand,\n _ => kind,\n }\n}\n","output":"use clap::{Arg, Command, ErrorKind, Parser};\n\n#[derive(Parser, Debug)]\n#[command(author, version)]\nstruct Cli {\n #[arg(short, long)]\n input: String,\n}\n\nfn builder() -> Command<'static> {\n Command::new(\"demo\")\n .arg(\n Arg::new(\"files\")\n .num_args(1..=3),\n )\n}\n\nfn map(kind: ErrorKind) -> ErrorKind {\n match kind {\n ErrorKind::InvalidValue => ErrorKind::InvalidValue,\n ErrorKind::InvalidSubcommand => ErrorKind::InvalidSubcommand,\n _ => kind,\n }\n}\n","filename":"input.rs"},{"name":"no-op","path":"tests/no-op","input":"use clap::Parser;\n\n#[derive(Parser, Debug)]\n#[command(author, version, about)]\nstruct Args {\n #[arg(short, long)]\n name: String,\n\n #[arg(short, long, default_value_t = 1)]\n count: u8,\n}\n\nfn main() {\n let args = Args::parse();\n println!(\"Hello {}!\", args.name);\n}\n","output":"use clap::Parser;\n\n#[derive(Parser, Debug)]\n#[command(author, version, about)]\nstruct Args {\n #[arg(short, long)]\n name: String,\n\n #[arg(short, long, default_value_t = 1)]\n count: u8,\n}\n\nfn main() {\n let args = Args::parse();\n println!(\"Hello {}!\", args.name);\n}\n","filename":"input.rs"},{"name":"non-clap-no-op","path":"tests/non-clap-no-op","input":"struct Builder;\n\nimpl Builder {\n fn takes_value(self, _enabled: bool) -> Self {\n self\n }\n\n fn multiple_values(self, _enabled: bool) -> Self {\n self\n }\n\n fn min_values(self, _count: usize) -> Self {\n self\n }\n}\n\nenum ErrorKind {\n EmptyValue,\n UnrecognizedSubcommand,\n}\n\nfn build() {\n let builder = Builder;\n let _ = builder\n .takes_value(true)\n .multiple_values(true)\n .min_values(2);\n\n let kind = ErrorKind::EmptyValue;\n let _ = match kind {\n ErrorKind::EmptyValue => 0,\n ErrorKind::UnrecognizedSubcommand => 1,\n };\n}\n","output":"struct Builder;\n\nimpl Builder {\n fn takes_value(self, _enabled: bool) -> Self {\n self\n }\n\n fn multiple_values(self, _enabled: bool) -> Self {\n self\n }\n\n fn min_values(self, _count: usize) -> Self {\n self\n }\n}\n\nenum ErrorKind {\n EmptyValue,\n UnrecognizedSubcommand,\n}\n\nfn build() {\n let builder = Builder;\n let _ = builder\n .takes_value(true)\n .multiple_values(true)\n .min_values(2);\n\n let kind = ErrorKind::EmptyValue;\n let _ = match kind {\n ErrorKind::EmptyValue => 0,\n ErrorKind::UnrecognizedSubcommand => 1,\n };\n}\n","filename":"input.rs"},{"name":"num-args-normalization","path":"tests/num-args-normalization","input":"use clap::{Arg, Command};\n\nfn build_cli() -> Command<'static> {\n Command::new(\"myapp\")\n .arg(\n Arg::new(\"files\")\n .num_args(2..=5),\n )\n .arg(\n Arg::new(\"tags\")\n .num_args(3..=7),\n )\n .arg(\n Arg::new(\"mode\")\n .num_args(1),\n )\n}\n","output":"use clap::{Arg, Command};\n\nfn build_cli() -> Command<'static> {\n Command::new(\"myapp\")\n .arg(\n Arg::new(\"files\")\n .num_args(2..=5),\n )\n .arg(\n Arg::new(\"tags\")\n .num_args(3..=7),\n )\n .arg(\n Arg::new(\"mode\")\n .num_args(1),\n )\n}\n","filename":"input.rs"},{"name":"takes-value-cleanup","path":"tests/takes-value-cleanup","input":"// Tests removal of takes_value from derive attrs and setting = AppSettings:: from #[command].\nuse clap::{AppSettings, Parser, Subcommand};\n\n#[derive(Parser, Debug)]\n#[clap(setting = AppSettings::SubcommandRequiredElseHelp)]\npub struct Cli {\n #[clap(subcommand)]\n pub command: Commands,\n\n /// Model override\n #[clap(long, takes_value = true)]\n pub model: Option,\n\n /// Max turns before auto-stop\n #[clap(long, takes_value = true, default_value = \"100\")]\n pub max_turns: u32,\n\n /// Suppress output\n #[clap(long, takes_value = false)]\n pub quiet: bool,\n}\n\n#[derive(Subcommand, Debug)]\npub enum Commands {\n Ask {\n #[clap(takes_value = true)]\n prompt: String,\n },\n}\n","output":"// Tests removal of takes_value from derive attrs and setting = AppSettings:: from #[command].\nuse clap::{Parser, Subcommand};\n\n#[derive(Parser, Debug)]\npub struct Cli {\n #[command(subcommand)]\n pub command: Commands,\n\n /// Model override\n #[arg(long)]\n pub model: Option,\n\n /// Max turns before auto-stop\n #[arg(long, default_value = \"100\")]\n pub max_turns: u32,\n\n /// Suppress output\n #[arg(long)]\n pub quiet: bool,\n}\n\n#[derive(Subcommand, Debug)]\npub enum Commands {\n Ask {\n #[arg()]\n prompt: String,\n },\n}\n","filename":"input.rs"},{"name":"value-enum","path":"tests/value-enum","input":"use clap::Parser;\n\n#[derive(Parser)]\n#[clap(author, version)]\nstruct Cli {\n #[clap(arg_enum)]\n mode: Mode,\n}\n\n#[derive(Clone, clap::ArgEnum)]\nenum Mode {\n Fast,\n Slow,\n}\n","output":"use clap::Parser;\n\n#[derive(Parser)]\n#[command(author, version)]\nstruct Cli {\n #[arg(value_enum)]\n mode: Mode,\n}\n\n#[derive(Clone, clap::ValueEnum)]\nenum Mode {\n Fast,\n Slow,\n}\n","filename":"input.rs"}]},"defaultWorkflowName":"default","createdAt":"2026-03-31T08:21:22.885Z","updatedAt":"2026-09-06 12:28:42.656769+00"},"publishedBy":{"id":"30d9959c-478f-4ef5-9201-c707980a4c14","username":"vinhnx","name":"Vinh Nguyen"},"insightsTemplate":null,"workflows":[{"name":"default","path":"workflow.yaml","description":null,"isDefault":true,"languages":["rust"],"stepTypes":["js-ast-grep","install-skill"],"workflowMetadata":{"nodes":[{"id":"jssg-apply","name":"Transform Rust source files","steps":[{"name":"Migrate clap v3 APIs to v4","type":"js-ast-grep","language":"rust"},{"name":"Install clap-v3-to-v4 skill","type":"install-skill"}]}]}}],"packageBehavior":"workflow-and-skill","isBundle":false,"bundleChildren":[],"parentBundles":[]},{"version":{"id":"67167c8a-127a-4dde-a9c4-998aab8ce8fb","packageId":"05af32d4-d2de-4dea-9c9d-249a85e1f61a","version":"1.0.11","description":"Migrate Rust clap CLI parser from v3 to v4: derive/value enum renames, builder API updates to num_args, ErrorKind renames, and AppSettings cleanup","manifest":{"name":"clap-v3-to-v4","author":"Vinh Nguyen ","license":"MIT","targets":{"versions":{},"languages":["rust"],"frameworks":[]},"version":"1.0.11","keywords":["rust","clap","cli","migration","v3-to-v4","argument-parser","derive","builder"],"registry":{"access":"public","visibility":"public"},"workflow":"workflow.yaml","description":"Migrate Rust clap CLI parser from v3 to v4: derive/value enum renames, builder API updates to num_args, ErrorKind renames, and AppSettings cleanup","dependencies":[],"schema_version":"1.0"},"checksum":"9fe495d7ac2c81903cc91220632e165189e3deb769576703a0854d2f90d4ba18","size":10926,"downloadUrl":"https://registry-cdn.codemod.com/prod/packages/clap-v3-to-v4/1.0.11/public.tar.gz","aiGenerated":false,"sourceArchiveS3Key":null,"targets":{"languages":["typescript"],"frameworks":[]},"dependencies":[],"languages":["rust"],"stepTypes":["js-ast-grep","install-skill"],"workflowMetadata":{"nodes":[{"id":"jssg-apply","name":"Transform Rust source files","steps":[{"name":"Migrate clap v3 APIs to v4","type":"js-ast-grep","language":"rust"},{"name":"Install clap-v3-to-v4 skill","type":"install-skill"}]}]},"validated":false,"validationErrors":null,"publishedBy":"30d9959c-478f-4ef5-9201-c707980a4c14","deprecated":false,"deprecationMessage":null,"downloadCount":3,"cachedTestCases":{"input":"use clap::{App, Arg, AppSettings};\n\nfn build_cli() -> App<'static> {\n App::new(\"test\")\n .setting(AppSettings::ColoredHelp)\n .setting(AppSettings::ArgRequiredElseHelp)\n .arg(\n Arg::new(\"name\")\n .short('n')\n .takes_value(true),\n )\n}\n","output":"use clap::{App, Arg};\n\nfn build_cli() -> App<'static> {\n App::new(\"test\")\n .arg(\n Arg::new(\"name\")\n .short('n')\n .num_args(1..),\n )\n}\n","isValid":true},"defaultWorkflowName":"default","createdAt":"2026-03-31T06:08:29.594Z","updatedAt":"2026-09-06 12:28:42.858061+00"},"publishedBy":{"id":"30d9959c-478f-4ef5-9201-c707980a4c14","username":"vinhnx","name":"Vinh Nguyen"},"insightsTemplate":null,"workflows":[{"name":"default","path":"workflow.yaml","description":null,"isDefault":true,"languages":["rust"],"stepTypes":["js-ast-grep","install-skill"],"workflowMetadata":{"nodes":[{"id":"jssg-apply","name":"Transform Rust source files","steps":[{"name":"Migrate clap v3 APIs to v4","type":"js-ast-grep","language":"rust"},{"name":"Install clap-v3-to-v4 skill","type":"install-skill"}]}]}}],"packageBehavior":"workflow-and-skill","isBundle":false,"bundleChildren":[],"parentBundles":[]},{"version":{"id":"770c0680-e17d-4f87-9236-03b735614ff8","packageId":"05af32d4-d2de-4dea-9c9d-249a85e1f61a","version":"1.0.10","description":"Migrate Rust clap CLI parser from v3 to v4: derive/value enum renames, builder API updates to num_args, ErrorKind renames, and AppSettings cleanup","manifest":{"name":"clap-v3-to-v4","author":"Vinh Nguyen ","license":"MIT","targets":{"versions":{},"languages":["rust"],"frameworks":[]},"version":"1.0.10","keywords":["rust","clap","cli","migration","v3-to-v4","argument-parser","derive","builder"],"registry":{"access":"public","visibility":"public"},"workflow":"workflow.yaml","description":"Migrate Rust clap CLI parser from v3 to v4: derive/value enum renames, builder API updates to num_args, ErrorKind renames, and AppSettings cleanup","dependencies":[],"schema_version":"1.0"},"checksum":"268156d8eefe10404e8da0da90b4f97cb5bee7fe511ba426d95098d219e28809","size":10844,"downloadUrl":"https://registry-cdn.codemod.com/prod/packages/clap-v3-to-v4/1.0.10/public.tar.gz","aiGenerated":false,"sourceArchiveS3Key":null,"targets":{"languages":["typescript"],"frameworks":[]},"dependencies":[],"languages":["rust"],"stepTypes":["js-ast-grep"],"workflowMetadata":{"nodes":[{"id":"jssg-apply","name":"Transform Rust source files","steps":[{"name":"Migrate clap v3 APIs to v4","type":"js-ast-grep","language":"rust"}]}]},"validated":false,"validationErrors":null,"publishedBy":"30d9959c-478f-4ef5-9201-c707980a4c14","deprecated":false,"deprecationMessage":null,"downloadCount":3,"cachedTestCases":{"input":"use clap::{App, Arg, AppSettings};\n\nfn build_cli() -> App<'static> {\n App::new(\"test\")\n .setting(AppSettings::ColoredHelp)\n .setting(AppSettings::ArgRequiredElseHelp)\n .arg(\n Arg::new(\"name\")\n .short('n')\n .takes_value(true),\n )\n}\n","output":"use clap::{App, Arg};\n\nfn build_cli() -> App<'static> {\n App::new(\"test\")\n .arg(\n Arg::new(\"name\")\n .short('n')\n .num_args(1..),\n )\n}\n","isValid":true},"defaultWorkflowName":"default","createdAt":"2026-03-29T09:57:56.848Z","updatedAt":"2026-09-06 12:28:44.427782+00"},"publishedBy":{"id":"30d9959c-478f-4ef5-9201-c707980a4c14","username":"vinhnx","name":"Vinh Nguyen"},"insightsTemplate":null,"workflows":[{"name":"default","path":"workflow.yaml","description":null,"isDefault":true,"languages":["rust"],"stepTypes":["js-ast-grep"],"workflowMetadata":{"nodes":[{"id":"jssg-apply","name":"Transform Rust source files","steps":[{"name":"Migrate clap v3 APIs to v4","type":"js-ast-grep","language":"rust"}]}]}}],"packageBehavior":"workflow-only","isBundle":false,"bundleChildren":[],"parentBundles":[]},{"version":{"id":"27c7ee7d-f952-4247-9e72-f98a0cc9512c","packageId":"05af32d4-d2de-4dea-9c9d-249a85e1f61a","version":"1.0.9","description":"Migrate Rust clap CLI parser from v3 to v4: derive/value enum renames, builder API updates to num_args, ErrorKind renames, and AppSettings cleanup","manifest":{"name":"clap-v3-to-v4","author":"Vinh Nguyen ","license":"MIT","targets":{"versions":{},"languages":["rust"],"frameworks":[]},"version":"1.0.9","keywords":["rust","clap","cli","migration","v3-to-v4","argument-parser","derive","builder"],"registry":{"access":"public","visibility":"public"},"workflow":"workflow.yaml","description":"Migrate Rust clap CLI parser from v3 to v4: derive/value enum renames, builder API updates to num_args, ErrorKind renames, and AppSettings cleanup","dependencies":[],"schema_version":"1.0"},"checksum":"592d6f7e96dd7e364bf5c5674b87efa24d42baaed294e6891c65616f7a31972b","size":10811,"downloadUrl":"https://registry-cdn.codemod.com/prod/packages/clap-v3-to-v4/1.0.9/public.tar.gz","aiGenerated":false,"sourceArchiveS3Key":null,"targets":{"languages":["typescript"],"frameworks":[]},"dependencies":[],"languages":["rust"],"stepTypes":["js-ast-grep"],"workflowMetadata":{"nodes":[{"id":"jssg-apply","name":"Transform Rust source files","steps":[{"name":"Migrate clap v3 APIs to v4","type":"js-ast-grep","language":"rust"}]}]},"validated":false,"validationErrors":null,"publishedBy":"30d9959c-478f-4ef5-9201-c707980a4c14","deprecated":false,"deprecationMessage":null,"downloadCount":5,"cachedTestCases":{"input":"use clap::{App, Arg, AppSettings};\n\nfn build_cli() -> App<'static> {\n App::new(\"test\")\n .setting(AppSettings::ColoredHelp)\n .setting(AppSettings::ArgRequiredElseHelp)\n .arg(\n Arg::new(\"name\")\n .short('n')\n .takes_value(true),\n )\n}\n","output":"use clap::{App, Arg};\n\nfn build_cli() -> App<'static> {\n App::new(\"test\")\n .arg(\n Arg::new(\"name\")\n .short('n')\n .num_args(1..),\n )\n}\n","isValid":true},"defaultWorkflowName":"default","createdAt":"2026-03-29T08:27:40.296Z","updatedAt":"2026-09-06 12:28:43.524004+00"},"publishedBy":{"id":"30d9959c-478f-4ef5-9201-c707980a4c14","username":"vinhnx","name":"Vinh Nguyen"},"insightsTemplate":null,"workflows":[{"name":"default","path":"workflow.yaml","description":null,"isDefault":true,"languages":["rust"],"stepTypes":["js-ast-grep"],"workflowMetadata":{"nodes":[{"id":"jssg-apply","name":"Transform Rust source files","steps":[{"name":"Migrate clap v3 APIs to v4","type":"js-ast-grep","language":"rust"}]}]}}],"packageBehavior":"workflow-only","isBundle":false,"bundleChildren":[],"parentBundles":[]},{"version":{"id":"84769d51-cd8b-413c-ab2e-bfecf7ed2fe5","packageId":"05af32d4-d2de-4dea-9c9d-249a85e1f61a","version":"1.0.8","description":"Migrate Rust clap CLI parser from v3 to v4: derive/value enum renames, builder API updates to num_args, ErrorKind renames, and AppSettings cleanup","manifest":{"name":"clap-v3-to-v4","author":"Vinh Nguyen ","license":"MIT","targets":{"versions":{},"languages":["rust"],"frameworks":[]},"version":"1.0.8","keywords":["rust","clap","cli","migration","v3-to-v4","argument-parser","derive","builder"],"registry":{"access":"public","visibility":"public"},"workflow":"workflow.yaml","description":"Migrate Rust clap CLI parser from v3 to v4: derive/value enum renames, builder API updates to num_args, ErrorKind renames, and AppSettings cleanup","dependencies":[],"schema_version":"1.0"},"checksum":"2fa6445a772450de2ee6421fa3b8af8809e893d420c66f221df3b9cc2ec8148b","size":10827,"downloadUrl":"https://registry-cdn.codemod.com/prod/packages/clap-v3-to-v4/1.0.8/public.tar.gz","aiGenerated":false,"sourceArchiveS3Key":null,"targets":{"languages":["typescript"],"frameworks":[]},"dependencies":[],"languages":["rust"],"stepTypes":["js-ast-grep"],"workflowMetadata":{"nodes":[{"id":"jssg-apply","name":"Transform Rust source files","steps":[{"name":"Migrate clap v3 APIs to 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