with rustup installed, simply do:
cargo install whatfeatures
```
USAGE:
whatfeatures [FLAGS] [OPTIONS]
FLAGS: -d, --deps Display dependencies for this crate -h, --help Prints help information -j, --json Use JSON as the output format. Defaults to a textual format -l, --list List all versions for the crate -n, --no-features Disable listing the features for the crate -s, --short Display only the name and version, such as foo/0.1.2 -y, --show-yanked Shows any yanked versions. Defaults to hiding them
OPTIONS:
-c, --color
ARGS:
This allows you to lookup a specific crate, at a specific version and get its default and optional features. It also allows listing the deps for the specified crate.
cargo whatfeatures serde
serde/1.0.97 default: std alloc derive: serde_derive rc std unstable
cargo whatfeatures twitchchat -v 0.5.0
twitchchat/0.5.0 default: all all: serde_hashbrown, parking_lot serde_hashbrown: serde, hashbrown/serde
cargo whatfeatures futures --show-yanked
yanked: futures/0.2.3-docs-yank.4 no default features
cargo whatfeatures --list --short lock-api
lock_api/0.3.1 lock_api/0.2.0 lock_api/0.1.5 lock_api/0.1.4 lock_api/0.1.3 lock_api/0.1.1 lock_api/0.1.0
cargo whatfeatures --list --short --show-yanked lock-api
lock_api/0.3.1 yanked: lock_api/0.3.0 lock_api/0.2.0 lock_api/0.1.5 lock_api/0.1.4 lock_api/0.1.3 yanked: lock_api/0.1.2 lock_api/0.1.1 lock_api/0.1.0
cargo whatfeatures simple-logger --list
simple_logger/1.3.0 default: colored simple_logger/1.2.0 default: colored simple_logger/1.1.0 no default features simple_logger/1.0.1 no default features simple_logger/1.0.0 no default features simple_logger/0.5.0 no default features simple_logger/0.4.0 no default features simple_logger/0.3.1 no default features simple_logger/0.3.0 no default features simple_logger/0.1.0 no default features simple_logger/0.0.2 no default features
note use -f false to not list the features
cargo whatfeatures curl --deps
curl/0.4.22 features default: ssl force-system-lib-on-osx: curl-sys/force-system-lib-on-osx http2: curl-sys/http2 ssl: openssl-sys, openssl-probe, curl-sys/ssl static-curl: curl-sys/static-curl static-ssl: curl-sys/static-ssl dependencies normal openssl-probe = ^0.1.2 if cfg(all(unix, not(target_os = "macos"))) openssl-sys = ^0.9.43 if cfg(all(unix, not(target_os = "macos"))) optional curl-sys = ^0.4.18 kernel32-sys = ^0.2.2 if cfg(target_env = "msvc") libc = ^0.2.42 schannel = ^0.1.13 if cfg(target_env = "msvc") socket2 = ^0.3.7 winapi = ^0.2.7 if cfg(windows) dev mio = ^0.6 mio-extras = ^2.0.3
note use -f false to not list the features
cargo whatfeatures curl --deps -v 0.3.0
curl/0.3.0 features no default features dependencies normal optional curl-sys = ^0.2.0 libc = ^0.2 openssl-sys = ^0.7.0 if cfg(all(unix, not(target_os = "macos"))) dev mio = ^0.5
whatfeatures serde -j | jq .
json { "name": "serde", "version": "1.0.97", "yanked": false, "features": { "std": [], "unstable": [], "alloc": [], "default": [ "std" ], "rc": [], "derive": [ "serde_derive" ] } }
whatfeatures twitchchat -v 0.5.0 -j | jq .
json { "name": "twitchchat", "version": "0.5.0", "yanked": false, "features": { "serde_hashbrown": [ "serde", "hashbrown/serde" ], "default": [ "all" ], "all": [ "serde_hashbrown", "parking_lot" ] } }
whatfeatures futures --show-yanked -j | jq .
json { "name": "futures", "version": "0.2.3-docs-yank.4", "yanked": true, "features": {} }
whatfeatures --list --short lock-api -j | jq .
json { "lock_api": [ { "version": "0.3.1", "yanked": false }, { "version": "0.2.0", "yanked": false }, { "version": "0.1.5", "yanked": false }, { "version": "0.1.4", "yanked": false }, { "version": "0.1.3", "yanked": false }, { "version": "0.1.1", "yanked": false }, { "version": "0.1.0", "yanked": false } ] }
whatfeatures --list --short --show-yanked lock-api -j | jq .
json { "lock_api": [ { "version": "0.3.1", "yanked": false }, { "version": "0.3.0", "yanked": true }, { "version": "0.2.0", "yanked": false }, { "version": "0.1.5", "yanked": false }, { "version": "0.1.4", "yanked": false }, { "version": "0.1.3", "yanked": false }, { "version": "0.1.2", "yanked": true }, { "version": "0.1.1", "yanked": false }, { "version": "0.1.0", "yanked": false } ] }
whatfeatures simple-logger --list -j | jq .
json { "simple_logger": [ { "version": "1.3.0", "features": { "default": [ "colored" ] }, "yanked": false }, { "version": "1.2.0", "features": { "default": [ "colored" ] }, "yanked": false }, { "version": "1.1.0", "features": {}, "yanked": false }, { "version": "1.0.1", "features": {}, "yanked": false }, { "version": "1.0.0", "features": {}, "yanked": false }, { "version": "0.5.0", "features": {}, "yanked": false }, { "version": "0.4.0", "features": {}, "yanked": false }, { "version": "0.3.1", "features": {}, "yanked": false }, { "version": "0.3.0", "features": {}, "yanked": false }, { "version": "0.1.0", "features": {}, "yanked": false }, { "version": "0.0.2", "features": {}, "yanked": false } ] }
whatfeatures curl --deps -j | jq .
json { "name": "curl", "version": "0.4.22", "yanked": false, "features": { "ssl": [ "openssl-sys", "openssl-probe", "curl-sys/ssl" ], "force-system-lib-on-osx": [ "curl-sys/force-system-lib-on-osx" ], "static-curl": [ "curl-sys/static-curl" ], "default": [ "ssl" ], "http2": [ "curl-sys/http2" ], "static-ssl": [ "curl-sys/static-ssl" ] }, "dependencies": { "normal": [ { "curl-sys": { "req": "^0.4.18", "optional": false, "default_features": false, "features": [], "target": null } }, { "kernel32-sys": { "req": "^0.2.2", "optional": false, "default_features": true, "features": [], "target": "cfg(target_env = \"msvc\")" } }, { "libc": { "req": "^0.2.42", "optional": false, "default_features": true, "features": [], "target": null } }, { "schannel": { "req": "^0.1.13", "optional": false, "default_features": true, "features": [], "target": "cfg(target_env = \"msvc\")" } }, { "socket2": { "req": "^0.3.7", "optional": false, "default_features": true, "features": [], "target": null } }, { "winapi": { "req": "^0.2.7", "optional": false, "default_features": true, "features": [], "target": "cfg(windows)" } }, { "openssl-probe": { "req": "^0.1.2", "optional": true, "default_features": true, "features": [], "target": "cfg(all(unix, not(target_os = \"macos\")))" } }, { "openssl-sys": { "req": "^0.9.43", "optional": true, "default_features": true, "features": [], "target": "cfg(all(unix, not(target_os = \"macos\")))" } } ], "dev": [ { "mio": { "req": "^0.6", "optional": false, "default_features": true, "features": [], "target": null } }, { "mio-extras": { "req": "^2.0.3", "optional": false, "default_features": true, "features": [], "target": null } } ] } }
whatfeatures curl --deps -v 0.3.0 -j | jq .
json { "name": "curl", "version": "0.3.0", "yanked": false, "features": {}, "dependencies": { "normal": [ { "curl-sys": { "req": "^0.2.0", "optional": false, "default_features": true, "features": [], "target": null } }, { "libc": { "req": "^0.2", "optional": false, "default_features": true, "features": [], "target": null } }, { "openssl-sys": { "req": "^0.7.0", "optional": false, "default_features": true, "features": [], "target": "cfg(all(unix, not(target_os = \"macos\")))" } } ], "dev": [ { "mio": { "req": "^0.5", "optional": false, "default_features": true, "features": [], "target": null } } ] } }